A sampling device for boiler flue gases

Abstract

The utility model discloses a kind of sampling device for boiler flue gas, belong to the insertion position of sampling bottle in sampling device technical field is installed with check valve, sampling bottle is connected with sampling base butt joint, sampling port is installed in the one side of check valve, air inlet is opened outside sampling port, push extrusion cavity is opened around inside sampling base, spring is installed in push extrusion cavity, the outer end of spring is lifted and installed with piston plate, push connection thread is installed around in the sampling base inner ring on piston plate, sampling bottle is rotated outward after sampling ends, piston plate is sealed with the outward movement of sampling bottle, the pressure in sampling bottle pushes check valve and seals operation, the function of fast collection flue gas is realized, avoid overflow, the gas pressure in boiler will flue gas top into sampling bottle, after passing guide outlet into guide pipe, realize the function of continuous collection continuous export, the equipment structure is simple, can be repeatedly operated, cost is reduced.

Description

Technical Field

[0001] This utility model relates to a sampling device for boiler flue gas, belonging to the technical field of sampling devices. Background Technology

[0002] After searching, the closest prior art is the prior art with application number 202021635806.5. The prior art disclosed in this prior art document is a sampling device for flue gas detection in industrial boilers, which includes a connecting cylinder, an outer protective mesh plate connected to the left side of the connecting cylinder, a reinforcing rod connected to the inner side of the outer protective mesh plate, an inner protective mesh plate connected to the other end of the reinforcing rod, a ceramic filter plate installed inside the inner protective mesh plate, and an extension cylinder connected to the left side of the inner protective mesh plate.

[0003] The inner protective mesh plate of the sampling device is equipped with a ceramic filter plate. An extension cylinder is connected to the left side of the inner protective mesh plate. However, the sampling device in the prior art has a complex structure, high cost, and is not convenient for rapid sampling operation. It is also not convenient for sampling and testing on the spot and for preventing spillage. Therefore, a sampling device for boiler flue gas is needed to optimize the shortcomings of the prior art. Utility Model Content

[0004] The main purpose of this invention is to provide a sampling device for boiler flue gas.

[0005] The objective of this utility model can be achieved by adopting the following technical solution:

[0006] A sampling device for boiler flue gas includes a sampling bottle for collecting flue gas.

[0007] A one-way valve is installed at the insertion position of the sampling bottle. The sampling bottle is connected to the sampling base. A sampling port is installed on one side of the one-way valve, and an air inlet is opened on the outside of the sampling port.

[0008] The sampling base is equipped with a connecting and opening assembly, and the sampling bottle is equipped with a gas guiding assembly.

[0009] Preferably, the connection opening and closing assembly includes a connection flange, a pushing extrusion chamber, a pushing connection thread, a piston plate, and a spring;

[0010] The outer ring of the sampling base is equipped with a connecting flange, and the inner side of the sampling base is provided with a pushing and squeezing chamber. A spring is installed in the pushing and squeezing chamber, and a piston plate is installed at the outer end of the spring. The inner ring of the sampling base on the piston plate is provided with a pushing connecting thread.

[0011] Preferably, the gas guiding assembly includes an outlet and a sealing cap, with the outlet installed at the outer end of the sampling bottle and the outlet covered by a sealing cap.

[0012] Preferably, the sampling bottle is connected by a sampling port and a push-connecting thread.

[0013] Preferably, the one-way valve has an inlet-only structure, and the piston plate inside the sampling base has an outlet-only structure.

[0014] Preferably, the air inlet is connected to the inside of the sampling base.

[0015] The beneficial technical effects of this utility model are as follows:

[0016] This utility model provides a sampling device for boiler flue gas.

[0017] 1. Install the sampling base on top of the boiler cover or pot body. After the sampling base is installed, hold the sampling bottle and rotate it to align the sampling port with the push connection thread. Rotating the sampling bottle pushes the piston plate to move inward to the sampling base. During the movement, the sampling base is opened, the boiler is turned on, and the gas pressure inside the pot pushes the one-way valve to open, injecting gas into the sampling bottle. After sampling, hold the sampling bottle and rotate it outward. As the sampling bottle moves outward, the piston plate seals, and the pressure inside the sampling bottle pushes the one-way valve to seal, achieving the function of quickly collecting flue gas and preventing spillage.

[0018] 2. The outer end of the sampling bottle is sealed by a sealing cap. When continuous sampling or continuous export is required, a gas guide tube can be connected to the export port. The sampling bottle is placed in the sampling base. The gas pressure in the boiler pushes the flue gas into the sampling bottle and then into the guide tube through the export port to achieve the function of continuous sampling and export. This equipment has a simple structure, can be repeatedly operated, and reduces costs. The connecting flange 201 has an arc or parallel structure, which is convenient for fitting and sealing. Attached Figure Description

[0019] Figure 1 This is an exploded three-dimensional structural diagram of a preferred embodiment of a sampling device for boiler flue gas according to the present invention.

[0020] Figure 2 This is a schematic diagram of the sampling base structure of a preferred embodiment of a sampling device for boiler flue gas according to the present invention;

[0021] Figure 3 This is a schematic diagram of the internal structure of the sampling base of a preferred embodiment of a sampling device for boiler flue gas according to the present invention.

[0022] Figure 4 This is a schematic diagram of the sampling bottle opening structure of a preferred embodiment of a sampling device for boiler flue gas according to the present invention.

[0023] In the diagram: 1. Sampling bottle; 101. Sampling port; 102. Air inlet; 103. One-way valve; 104. Outlet; 105. Sealing cap; 2. Sampling base; 201. Connecting flange; 202. Pushing and squeezing chamber; 203. Pushing connecting thread; 204. Piston plate; 205. Spring. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the claimed invention, but merely represents some embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0026] It should be noted that, unless otherwise specified, the embodiments and features and technical solutions in the present invention can be combined with each other.

[0027] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0028] In the description of this utility model, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art. These terms are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used to distinguish the description and should not be construed as indicating or implying relative importance.

[0029] Example 1

[0030] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown in the figure, this embodiment provides a sampling device for boiler flue gas. The sampling base 2 consists of a connecting flange 201, a pushing and squeezing chamber 202, a pushing and connecting thread 203, a piston plate 204, and a spring 205. The pushing and squeezing chamber 202 has a cylindrical cavity structure, and its inner diameter is interference-fitted with the outer diameter of the piston plate 204 (interference amount 0.2~0.3mm). The inner wall of the cavity is hard anodized, and the surface hardness is ≥HV500. A guide limiting protrusion is set in the length direction, which cooperates with the guide groove on the outer periphery of the piston plate to limit the movement trajectory of the piston plate and avoid deflection. A circular metal plate with a thickness of 8mm is used, and a fluororubber sealing ring with a cross-sectional diameter of 5mm is inlaid on the edge. The compression of the sealing ring is controlled at 15%~20% to ensure sealing performance. A spring mounting post is set in the center of the piston plate to fix one end of the spring 205.

[0031] After aging treatment, the elastic modulus is 15-20 N / mm, ensuring that the sealing pressure of the piston plate on the sampling base 2 is not less than 0.5 MPa when the piston plate is reset. The sampling base 2 is connected to the sampling bottle 1, which consists of a sampling port 101, an air inlet 102, a one-way valve 103, an outlet 104, and a sealing cap 105. The main body of the sampling bottle 1 adopts a double-layer vacuum heat insulation structure, which can withstand the highest temperature of boiler flue gas up to 600℃, while keeping the outer surface temperature of the sampling bottle ≤50℃ to ensure the safety of the operator. The outer surface of the sampling bottle 1 is provided with annular anti-slip texture with a depth of 1.5 mm and a pitch of 3 mm.

[0032] Install the sampling base 2 on top of the boiler cover or pot body via the connecting flange 201, tighten the bolts to ensure a seal, hold the sampling bottle 1, align the internal thread of the sampling port 101 with the push connecting thread 203, rotate the sampling bottle clockwise, the sampling bottle moves forward along the thread, pushing the piston plate 204 to move inward to the sampling base, the spring 205 is compressed, when the piston plate moves 15mm (reaches the limit position), it pushes the extrusion chamber 202 to open completely, at this time the high-pressure flue gas (pressure 0.3-0.5MPa) in the boiler pushes open the one-way valve 103, and is quickly injected into the sampling bottle 1 through the air inlet 102;

[0033] After sampling is completed, rotate sampling bottle 1 counterclockwise. The sampling bottle moves outward, and piston plate 204 moves outward under the restoring force of spring 205. When piston plate moves to the initial position, it completely seals and pushes squeezing chamber 202. At the same time, the gas pressure in the sampling bottle (which is consistent with the gas pressure in the pot) causes one-way valve 103 to close, preventing gas from escaping.

[0034] Example 2

[0035] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, this embodiment provides a sampling device for boiler flue gas. The outer end of the sampling bottle 1 is sealed by a sealing cap 105. When continuous sampling or export is required, the sealing cap 105 is removed, and a gas guide tube (with an inner diameter of 8 mm and made of high-temperature resistant silicone material) is connected to the export port 104. The sampling bottle 1 is placed into the sampling base 2, and the base is opened by the same rotation operation described above.

[0036] The internal pressure of the boiler forces the flue gas into sampling bottle 1, which then enters the subsequent processing equipment through outlet 104 and gas guide pipe to achieve continuous collection and export. The connecting flange 201 is an arc-shaped or parallel structure. When used for a circular boiler cover, the radius of curvature of the inner arc surface of the arc-shaped flange is consistent with the curvature of the outer arc of the boiler cover (tolerance ±0.5mm). It is used with a 3mm thick high-temperature resistant graphite sealing gasket and is fastened to the boiler cover by evenly distributed bolts. When used for a flat boiler body, the surface roughness Ra of the parallel structure flange is ≤1.6μm to ensure a close and sealed fit with the boiler body surface.

[0037] The above description is only a further embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope disclosed by the present utility model, based on the technical solution and concept of the present utility model, shall fall within the protection scope of the present utility model.

Claims

1. A sampling device for boiler flue gas, comprising a sampling bottle (1) for flue gas collection; Its features are: A one-way valve (103) is installed at the insertion position of the sampling bottle (1). The sampling bottle (1) is connected to the sampling base (2). A sampling port (101) is installed on one side of the one-way valve (103). An air inlet (102) is opened on the outside of the sampling port (101). The sampling base (2) is equipped with a connecting opening and closing component, and the sampling bottle (1) is equipped with a gas guiding component at the outer end.

2. The sampling device for boiler flue gas according to claim 1, characterized in that: The connection opening and closing assembly includes a connection flange (201), a push extrusion chamber (202), a push connection thread (203), a piston plate (204), and a spring (205); A connecting flange (201) is installed on the outer ring of the sampling base (2). A pushing and squeezing chamber (202) is opened around the inner side of the sampling base (2). A spring (205) is installed in the pushing and squeezing chamber (202). A piston plate (204) is installed on the outer end of the spring (205). A pushing connecting thread (203) is installed around the inner ring of the sampling base (2) on the piston plate (204).

3. The sampling device for boiler flue gas according to claim 1, characterized in that: The gas delivery assembly includes an outlet (104) and a sealing cap (105). The outer end of the sampling bottle (1) is equipped with an outlet (104), and the outlet (104) is wrapped with a sealing cap (105).

4. A sampling device for boiler flue gas according to claim 2, characterized in that: The sampling bottle (1) is connected by a sampling port (101) and a push connection thread (203).

5. A sampling device for boiler flue gas according to claim 2, characterized in that: The one-way valve (103) is a one-way valve that only allows inflow and not outflow, and the piston plate (204) inside the sampling base (2) is a one-way valve that only allows outflow and not inflow.

6. A sampling device for boiler flue gas according to claim 4, characterized in that: The air inlet (102) is connected to the inside of the sampling base (2).

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