Novel smoke sampling probe rod structure

Abstract

The utility model discloses a novel smoke sampling feeler lever structure. A feeler lever comprises a pre-filter, a feeler lever sampling pipe and a secondary filtering assembly, the pre-filter is fixed on the outer end surface of one end of the probe rod sampling pipe and is communicated with the probe rod sampling pipe; a detachable secondary filtering assembly is fixed on the outer end surface of the other end of the probe rod sampling pipe and is communicated with the probe rod sampling pipe; the device has the advantages that the secondary filtering assembly is detachably arranged on the end face of one end of the probe rod sampling pipe, and the external flue gas measuring device is arranged on the secondary filtering assembly, so that when the probe rod sampling pipe is blocked, the external flue gas measuring device and the secondary filtering assembly do not need to be disassembled one by one; the secondary filter assembly is directly disassembled together with the external smoke measuring device, so that the disassembly steps are simplified, the maintenance and replacement time is reduced, the secondary filter can be independently replaced, and the feeler lever sampling pipe can be maintained and replaced by a single person due to the light weight of the feeler lever sampling pipe, so that the workload is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas sampling, in particular to a novel flue gas sampling probe structure. Background Technique

[0002] With the continuous enhancement of people's awareness of environmental protection, the requirements for domestic monitoring of air pollution, especially the online monitoring of flue gas from major flue gas emission sources such as power plants, are increasing day by day. In response to national policies and to meet the monitoring requirements of incineration tail gas, combined with the engineering experience accumulated over the years in the fields of environmental monitoring, pollution control, and process monitoring, in the case of special working conditions such as high temperature, high humidity, and high corrosiveness in the existing flue gas sampling device, when the filter of the probe is blocked, the sampling pipe of the probe is blocked, and the components are worn in high-temperature, high-speed, and high-dust flue gas, it is necessary to pull out the probe for replacement or maintenance. Due to frequent blockage of the probe, the filter device on the probe also needs to be frequently replaced. When the probe is connected to an external flue gas measuring device for use, the overall weight of the probe and the external flue gas measuring device is relatively large, and multiple people are required to cooperate for maintenance and replacement. At present, the existing structure requires the external flue gas measuring device and the probe to be removed one by one, and then the sampling pipe of the probe and the filter device arranged on the probe are removed separately for maintenance and replacement. The operation is complex, wasting a lot of time, increasing the workload of the staff, and being not conducive to frequent replacement and maintenance. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is that when the existing probe structure is replaced and maintained, the operation is complex, time-consuming, increasing the workload of the staff, and being not conducive to replacement and maintenance.

[0004] The utility model realizes that when maintaining and replacing the probe, it is not necessary to remove the external flue gas measuring device and the secondary filtering component one by one by detachably arranging the secondary filtering component on one end face of the probe sampling pipe and arranging the external flue gas measuring device on the secondary filtering component. The operation is simple, reducing the time and workload of maintenance and replacement.

[0005] The technical solution adopted is: a novel flue gas sampling probe structure, the probe includes a pre-filter, a probe sampling pipe, and a secondary filtering component; the pre-filter is fixed on the outer end face of one end of the probe sampling pipe and is communicated with the probe sampling pipe; a detachable secondary filtering component is fixed on the outer end face of the other end of the probe sampling pipe, and the secondary filtering component is communicated with the probe sampling pipe.

[0006] For further optimization of the technical solution of the utility model, the outer end face of the probe sampling pipe fixed with the secondary filtering component is an outward-expanded annular end face, which is convenient for the disassembly and installation of the secondary filter tank.

[0007] For further optimization of the technical solution of the present utility model, a secondary filter tank, a secondary filter cover plate detachably arranged on the outer end surface of the end of the probe sampling tube not connected to the pre-filter, and a secondary filter arranged in the secondary filter tank, the secondary filter cover plate is detachably arranged on the outer end surface of the end of the secondary filter tank not connected to the probe sampling tube; it is convenient to repair and replace the secondary filtering component.

[0008] For further optimization of the technical solution of the present utility model, an external flue gas measuring device is provided on the secondary filtering component, and the external flue gas measuring device is fixed on the outer side wall of the secondary filter tank; it is convenient when maintaining and replacing the secondary filter, without being affected by the external flue gas measuring device.

[0009] For further optimization of the technical solution of the present utility model, an air outlet hole is also opened on the secondary filter cover plate to facilitate communication with the external flue gas measuring device, so as to input the sampled gas collected by the probe into the external flue gas measuring device through the air outlet hole for measurement.

[0010] For further optimization of the technical solution of the present utility model, an annular installation groove for facilitating the fixing of the secondary filter is provided in the secondary filter tank, the annular installation groove is fixed on the inner wall of the secondary filter tank, and the secondary filter is fixed in the annular installation groove for defining the installation position of the secondary filter.

[0011] For further optimization of the technical solution of the present utility model, a sealing gasket is respectively provided on the front and rear sides of the secondary filter along the extending direction of the secondary filter tank, and the two sealing gaskets are respectively arranged between the annular installation groove and the secondary filter and between the secondary filter and the secondary filter cover plate, for strengthening the sealing between the secondary filter and the secondary filter tank, ensuring that the flue gas collected through the probe sampling tube can be filtered by the secondary filter, and at the same time defining the installation position of the secondary filter.

[0012] For further optimization of the technical solution of the present utility model, an interface for communicating with external equipment for back blowing and realizing the calibration function is opened on the side wall of the secondary filter tank, the interface is communicated with the secondary filter tank, the interface is located between the end of the secondary filter tank connected to the probe sampling tube and the annular installation groove, during back blowing, the secondary filter can play a current limiting role, and during calibration, it is filtered by the secondary filter and input into the external flue gas measuring device to realize the calibration function.

[0013] For further optimization of the technical solution of the present utility model, the external flue gas measuring device is fixed on the outer side wall of the secondary filter tank through a fixing clamp plate, and a round hole for facilitating the connection of the external back blowing pipe or the external booster pump interface is opened on the fixing clamp plate, and the round hole is coaxial with the interface, which is convenient for maintaining and replacing the secondary filtering component without being affected by the external flue gas measuring device.

[0014] For further optimization of the technical solution of the present utility model, a flange is provided on the probe sampling tube to facilitate subsequent fixing of the probe in the external flue. The flange is fixed on the outer side wall of the probe sampling tube. A high-temperature resistant gasket is provided on the side of the flange plate of the flange facing the pre-filter, which facilitates strengthening the sealing performance between the flange and the installation flange during subsequent installation and matching, and avoiding the outflow of flue gas in the flue from the gap between the flange and the installation flange.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1. In the present utility model, the secondary filtration assembly is detachably arranged on one end face of the probe sampling tube, and the external flue gas measuring device is arranged on the secondary filtration assembly. When the probe sampling tube is blocked, it is not necessary to remove the external flue gas measuring device and the secondary filtration assembly one by one. When directly removing the secondary filtration assembly, the external flue gas measuring device is removed together, which simplifies the disassembly steps and reduces the maintenance and replacement time. Since the probe sampling tube is relatively light in weight, a single person can maintain and replace the probe sampling tube, reducing the workload.

[0017] 2. In the present utility model, the secondary filter can be separately maintained and replaced through the secondary filter cover plate, without removing the secondary filter assembly from the probe sampling tube or removing the external flue gas measuring device from the secondary filtration assembly for maintenance and replacement. Description of the Drawings

[0018] Figure 1 It is the structure of the probe connected to the external flue gas measuring device and installed in the external flue;

[0019] Figure 2 It is the overall structure schematic diagram of the probe;

[0020] Figure 3 It is Figure 2 The partial enlarged view of the structure at A in

[0021] Figure 4 It is the partial cross-sectional view of the secondary filtration assembly;

[0022] Description of the reference numerals: 1 - probe, 2 - external flue gas measuring device, 3 - installation flange, 11 - pre-filter, 12 - probe sampling tube, 13 - secondary filtration assembly, 14 - flange, 15 - high-temperature resistant gasket, 131 - secondary filter tank, 132 - secondary filter, 133 - secondary filter cover plate, 134 - gasket, 135 - interface, 136 - air outlet. Detailed Embodiment

[0023] In order to make the purpose, technical solution and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. Embodiment

[0024] As Figures 1-4 shown, for a novel flue gas sampling probe structure of this embodiment, the probe 1 includes a probe sampling tube 12. A pre-filter 11 is provided on the outer end surface of one end of the probe sampling tube 12, and a detachable secondary filter assembly 13 is provided on the outer end surface of the other end of the probe sampling tube 12.

[0025] The pre-filter 11 is threadedly connected to the probe sampling tube 12. When the pre-filter is blocked, it is convenient to disassemble for maintenance and replacement.

[0026] The secondary filter assembly 13 includes a secondary filter tank 132, a secondary filter 131, and a secondary filter cover plate 133.

[0027] As Figure 4 shown, in this embodiment, the secondary filter tank 132 is cylindrical with a hollowed-out middle part. One end is fixed to the outer end surface of the probe sampling tube 12 by six M5 bolts from left to right, and the secondary filter cover plate 133 is fixed to the other end of the secondary filter tank 132 by six M5 bolts.

[0028] In this embodiment, an annular groove is formed on the contact surface between the secondary filter tank 132 and the probe sampling tube 12, and a seal is provided in the annular groove. The end surface of one end of the probe sampling tube 12 connected to the secondary filter assembly 13 is an outward-expanded annular end surface, which is convenient for fixing the probe sampling tube 12 to the secondary filter tank 132. An annular protrusion is also provided on the annular end surface of the probe sampling tube 12, which is matched with the annular groove provided on the contact surface between the secondary filter tank 132 and the probe sampling tube 12. When the secondary filter tank 132 is fixed on the probe sampling tube 12, the cooperation of the annular protrusion, the annular groove, and the seal ensures the sealing performance at the connection between the probe sampling tube 12 and the secondary filter tank 132, avoiding the leakage of the sampled gas collected by the probe sampling tube 12.

[0029] Similarly, an annular groove is also formed on the contact surface between the secondary filter tank 132 and the secondary filter cover plate 133, and a seal is provided in the annular groove. An annular protrusion is provided on the contact surface between the secondary filter cover plate 133 and the secondary filter tank 132, which is matched with the annular groove. When the secondary filter cover plate 133 is fixed on the secondary filter tank 132, the action of the annular groove, the annular protrusion, and the seal ensures the sealing performance at the connection between the secondary filter tank 132 and the secondary filter cover plate 133, avoiding the leakage of the sampled gas in the secondary filter tank 132.

[0030] As Figure 4As shown, an air outlet hole 136 is formed on the secondary filter cover plate 133, and the external flue gas measuring device 2 is communicated with the air outlet hole 136 through an external pipeline, facilitating the output of the sampled gas collected by the probe 1 to the external flue gas measuring device 2 for measurement.

[0031] An annular installation groove for facilitating the installation of the secondary filter 131 is provided inside the secondary filter tank 132. The annular installation groove is arranged along the inner side wall of the secondary filter tank 132 and is welded to the inner side wall of the probe sampling pipe 12. The cross-section of the annular installation groove is stepped. The installation position of the annular installation groove is close to the secondary filter cover plate 133, and the secondary filter 131 is installed on the annular installation groove.

[0032] In this embodiment, sealing gaskets 134 for strengthening the sealing between the secondary filter 131 and the secondary filter tank 132 are respectively arranged on the front and rear sides of the secondary filter 131 to prevent the flue gas that has not passed through the secondary filter 131 from being discharged. The two sealing gaskets 134 are respectively arranged between the secondary filter 131 and the annular installation groove, and between the secondary filter 131 and the secondary filter cover plate 133. The two sealing gaskets 134 are both arranged close to the secondary filter 131, and the two sealing gaskets 134 can also play a role in defining the installation position of the secondary filter 131.

[0033] In this embodiment, the sealing gasket 134 is made of polytetrafluoroethylene, and the secondary filter 131 is filtered by filter sheets.

[0034] A square groove is formed on the outer side wall of the secondary filter tank 132, and an interface 135 communicated with external equipment is formed at the bottom of the square groove. The interface 135 is communicated with the secondary filter tank 132, and the interface 135 is located between the end of the secondary filter tank 132 connected to the probe sampling pipe 12 and the annular installation groove.

[0035] When the interface 135 is connected to external equipment through an external pipeline for backwashing, the pressure and flow rate inside the secondary filter tank 132 are large, and the sintered secondary filter 131 plays a role in restricting the flow, thereby reducing the impact of the backwashing gas on the external flue gas measuring device 2; during calibration, the external flue gas measuring device 2 is connected to an external auxiliary suction pump. Under the action of the external auxiliary suction pump, the calibration gas or zero gas enters the external flue gas measuring device 2 through the interface 135 and the secondary filter 131, realizing the calibration function.

[0036] The external flue gas measuring device 2 is fixed on the outer side wall of the secondary filter tank 132 through a fixed clamp. When it is necessary to maintain and replace the secondary filter 131, it is not necessary to disassemble the external flue gas measuring device 2. A round hole for facilitating the communication between external equipment and the interface 135 is formed on the side wall of the fixed clamp, and the round hole is coaxial with the interface 135.

[0037] The contact surface between the fixed splint and the secondary filter tank 132 is an arc surface, and the contact surface between the external flue gas measuring device 2 and the secondary filter tank 132 is also an arc surface, which is convenient for better fitting the secondary filter tank 132. The fixed splint presses the secondary filter tank 132 and the external flue gas measuring device 2, and the fixed splint is fixed on the external flue gas measuring device 2 by screws, so as to realize the fixed connection between the secondary filter tank 132 and the external flue gas measuring device 2.

[0038] As Figure 2 shown, a flange 14 for facilitating the subsequent fixing of the probe 1 in the external flue is provided on the probe sampling tube 12. The flange 14 is fixed on the outer side wall of the probe sampling tube 12, close to the secondary filter assembly 13, which is convenient for subsequently fixing the probe 1 in the flue by fixing the flange 14 on the installation flange 3.

[0039] On the side of the flange plate of the flange 14 facing the pre-filter 11, a high-temperature resistant gasket 15 is provided, which is convenient for strengthening the sealing performance between the flange 14 and the installation flange 3 during the subsequent installation and cooperation of the flange 14 and the installation flange 3, and avoiding the flue gas in the flue from flowing out through the gap between the flange 14 and the installation flange 3.

[0040] In this embodiment, a tubular flanging is welded at the edge of the flange 14.

[0041] As Figure 1 shown, when the probe 1 is installed and used, an installation flange 3 is sleeved on the probe 1. The installation flange 3 is fixedly connected with the flange 14, and the flange plate of the flange 14 abuts against the flange plate of the installation flange 3. Four probe pressing plates are fixed on the side of the installation flange 3 facing the secondary filter assembly 13 by bolts. The four probe pressing plates firmly fix the flange 14 on the installation flange 3, so as to complete the fixing of the probe 1 in the external flue through the installation flange 3.

[0042] The specific usage method of the novel flue gas sampling probe structure in this embodiment is as follows: when using the probe 1 to sample the flue gas of the external flue, the probe 1 is fixedly connected with the external flue gas measuring device 2. The flange 14 on the probe 1 is fixedly connected with the installation flange 3, so as to fix the probe 1 in the external flue for sampling. If the probe 1 is blocked during the sampling process, the probe 1 is removed from the flue. If the secondary filter 131 is blocked, the end cover of the secondary filter 131 is removed for maintenance and replacement of the secondary filter 131. If the probe sampling tube 12 is blocked, the secondary filter assembly 13 and the external flue gas measuring device 2 are removed together, and the probe sampling tube 12 is maintained and replaced; after maintenance and replacement, the probe 1 is fixed in the flue again through the cooperation of the flange 14 and the installation flange 3 to sample the gas.

[0043] The above embodiments are only used to illustrate the technical idea of the present utility model, and the protection scope of the present utility model cannot be limited thereby. Any modification made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A novel smoke sampling probe structure, characterized in that: The probe rod (1) comprises a pre-filter (11), a probe rod sampling tube (12) and a secondary filter assembly (13); the pre-filter (11) is fixed to the outer end surface of one end of the probe rod sampling tube (12) and is in communication with the probe rod sampling tube (12); a detachable secondary filter assembly (13) is fixed to the outer end surface of the other end of the probe rod sampling tube (12), and the secondary filter assembly (13) is in communication with the probe rod sampling tube (12).

2. The novel smoke sampling probe structure according to claim 1 is characterized in that: The outer end surface of the probe sampling tube (12) on which the secondary filter assembly (13) is fixed is an outwardly expanded annular end surface.

3. The novel smoke sampling probe structure according to claim 1 is characterized in that: The secondary filter assembly (13) comprises a secondary filter tank (131) detachably arranged on the outer end surface of one end of the probe sampling tube (12) not connected to the pre-filter (11), a secondary filter cover plate (133), and a secondary filter (132) arranged in the secondary filter tank (131); the secondary filter cover plate (133) is detachably arranged on the outer end surface of one end of the secondary filter tank (131) not connected to the probe sampling tube (12).

4. The novel smoke sampling probe structure according to claim 3 is characterized in that: An external smoke measuring device (2) is provided on the secondary filter assembly (13), and the external smoke measuring device (2) is fixed on the outer side wall of the secondary filter tank (131).

5. The novel smoke sampling probe structure according to claim 4 is characterized in that: The secondary filter cover plate (133) is also provided with an air outlet hole (136) for convenient communication with an external smoke measuring device (2).

6. The novel smoke sampling probe structure according to claim 3 is characterized in that: An annular mounting groove for facilitating fixing of the secondary filter (132) is provided in the secondary filter tank (131); the annular mounting groove is fixed on the inner wall of the secondary filter tank (131); and the secondary filter (132) is fixed in the annular mounting groove.

7. The novel smoke sampling probe structure according to claim 6 is characterized in that: A sealing gasket (134) is respectively provided on the front and rear sides of the secondary filter (132) along the extension direction of the secondary filter tank (131), and the two sealing gaskets (134) are respectively arranged between the annular mounting groove and the secondary filter (132) and between the secondary filter (132) and the secondary filter cover plate (133).

8. The novel smoke sampling probe structure according to claim 3 is characterized by: An interface (135) for communicating with an external device for back-blowing and realizing a calibration function is provided on a side wall of the secondary filter tank (131). The interface (135) is communicated with the secondary filter tank (131). The interface (135) is located between one end of the secondary filter tank (131) connected to the probe sampling tube (12) and the annular mounting groove.

9. The novel smoke sampling probe structure according to claim 8 is characterized in that: The external flue gas measuring device (2) is fixed to the outer wall of the secondary filter tank (131) via a fixing clamp, and a circular hole is provided on the fixing clamp for facilitating the connection of an external pipeline, and the circular hole is coaxial with the interface (135).

10. The novel smoke sampling probe structure according to claim 1 is characterized in that: The probe sampling tube (12) is provided with a flange (14) for facilitating the subsequent fixing of the probe (1) in the external flue. The flange (14) is fixed to the outer wall of the probe sampling tube (12). A high temperature resistant sealing gasket (15) is provided on the side of the flange plate of the flange (14) facing the pre-filter (11).

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