Multi-stage filtering and sampling device convenient to maintain

Abstract

The utility model discloses a multi-stage filtering and sampling device convenient to maintain, which realizes multi-stage filtering of sample gas through the combination of a pre-filter and a built-in filter, can ensure the cleanliness of the sample gas, effectively protects the service life of a subsequent flue gas analysis instrument, and improves the accuracy and reliability of a sampling result. The overall structural design of the device is reasonable, most parts are of spliced sealing structures, on the premise that the sealing performance of the device is guaranteed, the front filter and the built-in filter can be easily disassembled and replaced, and the maintenance cost and time are greatly reduced; particularly, the sampling rod can serve as a whole, during maintenance, the whole probe does not need to be disassembled, all accessories on the sampling rod can be cleaned and replaced only by disassembling the whole sampling rod part from the probe body, convenience and rapidness are achieved, the weight of the sampling rod part is small after the sampling rod part is pulled out, and labor cost and dangerousness are reduced; the sampling rod is assembled, and an internal cavity is small in size and convenient to clean.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas sampling technical field especially, relate to a multistage filtration sampling device of convenient maintenance. BACKGROUND

[0002] In the flue gas emission continuous monitoring system, need to continuously extract the flue gas in the chimney as the measurement sample gas, transport to the analysis cabinet and carry out sampling analysis, so the sampling device plays the vital role in the flue gas monitoring system.

[0003] In part complex, dustier use site, the traditional device is more prone to failure, specifically like Figure 5 As shown in the prior art, the flue gas sampling probe has only one built-in filter device, the sampling rod and the built-in filter device are easy to be blocked, the sample gas impurities are easy to be insufficiently filtered, the service life of the matching analytical instrument is affected, and the device is fixed by directly installing the sampling rod on the flange of the main base, so that the probe can be completely removed from the chimney during maintenance (cleaning or replacing the sampling rod or filter and the like accessories), and subsequent work can be carried out, which is a huge workload, and the overall weight of the probe is large, which is very dangerous, and if there are impurities in the cavity of the base, it is difficult to clean due to the large depth of the cavity, and it needs to be improved. SUMMARY

[0004] This section aims to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, in order to solve the above technical problems, the utility model provides the following technical scheme: a multistage filtration sampling device convenient to maintain, comprising a sampling mechanism and a filtering mechanism.

[0006] The sampling mechanism comprises a sampling rod, the rear side of the sampling rod is connected with an adapter pipe, the adapter pipe is provided with a probe shell outside, a heater is arranged outside the probe shell, the rear side of the probe shell is connected with a sealing cover, an exhaust passage is formed in the sealing cover, a sample gas outlet is formed in the probe shell corresponding to the exhaust passage and communicates with the exhaust passage, and the sample gas outlet is used to connect an exhaust joint.

[0007] The filtering mechanism comprises a pre-filter and a built-in filter, the pre-filter is arranged at the inlet of the sampling rod, the built-in filter is arranged in the probe shell, the tail end of the built-in filter is connected with the sealing cover, and the tail end outlet of the built-in filter communicates with the exhaust passage.

[0008] As a preferred scheme of the convenient maintenance multistage filtering sampling device, the tail end of the sampling rod is communicated with the adapter pipe, a sampling sealing ring is arranged at the connecting position of the sampling rod and the adapter pipe, and an adapter sealing ring is arranged at the connecting position of the end of the adapter pipe and the probe shell.

[0009] As a preferred scheme of the convenient maintenance multistage filtering sampling device, the adapter pipe is provided with a front-narrow-and-back-wide air inlet at the position corresponding to the sampling rod, and the built-in filter is arranged on the inner side of the air inlet.

[0010] As a preferred scheme of the convenient maintenance multistage filtering sampling device, a sealing gasket is arranged between the sealing cover and the probe shell, and the sealing gasket is made of high-temperature-resistant material.

[0011] As a preferred scheme of the convenient maintenance multistage filtering sampling device, the probe shell is provided with a mounting flange, and the main body base is connected to the mounting flange, the cross section of the main body base is in an L-shaped structure, a triangular rib plate is arranged in the concave portion of the main body base, two outer right-angle surfaces of the triangular rib plate are connected to the inner right-angle surface of the main body base, and the structural stability of the main body base is enhanced.

[0012] As a preferred scheme of the convenient maintenance multistage filtering sampling device, the rear side of the pre-filter is provided with an integrated pre-connection portion, the pre-connection portion is inserted into the front end inner cavity of the pre-filter, and a pre-sealing ring is arranged at the connecting position of the pre-connection portion and the sampling rod.

[0013] As a preferred scheme of the convenient maintenance multistage filtering sampling device, the rear end of the built-in filter is provided with an integrated post-connection portion, the post-connection portion is inserted into the corresponding slot of the sealing cover, and a post-sealing ring is arranged between the post-connection portion and the sealing cover.

[0014] The beneficial effects of the present utility model are as follows:

[0015] 1. The combination of the pre-filter and the built-in filter realizes multistage filtering of sample gas, guarantees the cleanliness of the sample gas, effectively protects the service life of subsequent flue gas analysis instruments, and improves the accuracy and reliability of sampling results.

[0016] 2、The whole structure of the device is reasonable in design, most of the parts are of a spliced sealing structure, under the premise of ensuring the sealing of the device, the front filter and the built-in filter can be easily disassembled and replaced, greatly reducing the maintenance cost and time; Especially the sampling rod can be used as a whole, when maintaining, the probe does not need to be disassembled as a whole, only the sampling rod part is disassembled from the probe body as a whole, the cleaning and replacement work of each accessory thereon can be carried out, which is convenient and fast, and the weight of the sampling rod part after being pulled out is very small, reducing the labor cost and danger; The sampling rod is spliced, the internal cavity is small in size, and cleaning is facilitated.

[0017] 3、The utility model discloses a heater is arranged outside the probe shell, effectively prevents sample gas condensation, improves sampling efficiency;Through the design of mounting flange and main base, and the reinforcement of triangular rib plate, the device structure is more stable, and can withstand various sampling environments. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiment of the utility model, the drawings needed in the embodiment description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor intensity. Among them:

[0019] Figure 1 It is the whole structure schematic diagram of the utility model.

[0020] Figure 2 It is the structure schematic diagram when the structure of the utility model is exploded.

[0021] Figure 3 It is the sectional structure schematic diagram of the utility model.

[0022] Figure 4 It is the sample gas flow path structure schematic diagram of the utility model.

[0023] Figure 5 It is the whole structure schematic diagram of prior art.

[0024] In the drawing: 100, sampling mechanism;101, sampling rod;1011, sampling sealing ring;102, adapter pipe;1021, adapter sealing ring;1022, gas inlet;103, probe shell;104, heater;105, sealing cover;1051, sealing gasket;106, exhaust passage;107, sample gas outlet;108, main base;109, triangular rib plate;110, mounting flange;

[0025] 200, filtering mechanism; 201, pre-filter; 2011, pre-connection part; 2012, pre-sealing ring; 202, built-in filter; 2021, post-connection part; 2022, post-sealing ring. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0027] In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the connotation of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0028] Secondly, the "one embodiment" or "embodiment" referred to herein can include specific features, structures or characteristics contained in at least one implementation of the present application. In this specification, "in one embodiment" does not mean the same embodiment, nor is it an independent or alternative embodiment that excludes other embodiments.

[0029] Thirdly, the present application is described in detail in conjunction with the schematic diagram, and in order to facilitate the description, the sectional view of the device structure will be partially enlarged without the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in actual manufacture.

[0030] Reference Figures 1-4 For the embodiments of the present application, a multi-stage filtering sampling device convenient to maintain is provided, which comprises a sampling mechanism 100 and a filtering mechanism 200;

[0031] The sampling mechanism 100 comprises a sampling rod 101, the rear side of the sampling rod 101 is connected with an adapter pipe 102, the tail end of the sampling rod 101 communicates with the adapter pipe 102, the connecting place of the sampling rod 101 and the adapter pipe 102 is arranged with a sampling sealing ring 1011, the adapter pipe 102 is arranged with a front-narrow-and-rear-wide air inlet 1022 corresponding to the position of the sampling rod 101, and an inner filter 202 is arranged on the inner side of the air inlet 1022; the end of the adapter pipe 102 is arranged with an adapter sealing ring 1021 at the connecting place with a probe shell 103, the adapter pipe 102 is sleeved with the probe shell 103, and the outside of the probe shell 103 is arranged with a heater 104; the probe shell 103 is arranged with a mounting flange 110, and a main body base 108 is connected through the mounting flange 110, the cross section of the main body base 108 is in an L-shaped structure, the inner recess of the main body base 108 is arranged with a triangular rib plate 109, the two outer right-angle surfaces of the triangular rib plate 109 are connected with the inner right-angle surfaces of the main body base 108, so that the structural stability of the main body base 108 is enhanced; the rear side of the probe shell 103 is connected with a sealing cover 105, a sealing gasket 1051 is arranged between the sealing cover 105 and the probe shell 103, and the sealing gasket 1051 is made of high-temperature-resistant material; an exhaust passage 106 is formed in the sealing cover 105, and the probe shell 103 is arranged with a sample gas outlet 107 corresponding to the exhaust passage 106, the sample gas outlet 107 is used for connecting an exhaust joint;

[0032] The filtering mechanism 200 comprises a front filter 201 and an inner filter 202, the front filter 201 is arranged at the inlet of the sampling rod 101, and the inner filter 202 is arranged in the probe shell 103, the tail end of the inner filter 202 is connected with the sealing cover 105, and the tail end outlet of the inner filter 202 communicates with the exhaust passage 106; the rear side of the front filter 201 is arranged with an integrated front connecting part 2011, the front connecting part 2011 is inserted into the front end inner cavity of the front filter 201, and the connecting place of the front connecting part 2011 and the sampling rod 101 is arranged with a front sealing ring 2012; the rear end of the inner filter 202 is arranged with an integrated rear connecting part 2021, the rear connecting part 2021 is inserted into the corresponding groove of the sealing cover 105, and the rear connecting part 2021 and the sealing cover 105 are arranged with a rear sealing ring 2022.

[0033] In the embodiment, during actual installation, the pre-filter 201 is spliced with the sampling rod 101 through the pre-connection part 2011, and the connection part is sealed through the pre-sealing ring 2012; the tail end of the sampling rod 101 is connected with the front end of the adapter pipe 102, and the connection part is sealed through the sampling sealing ring 1011; the post-filter 202 is inserted on the sealing cover 105 through the post-connection part 2021 at the tail of the post-filter 202, and the connection part is sealed through the post-sealing ring 2022; the sealing cover 105 is spliced on the probe shell 103, the connection part is sealed through the sealing gasket 1051, and then the above spliced whole is fixed on the main body base 108 through the installation flange 110, so as to realize the fixation of the device, and the main body outside of the device is reserved for the installation positions of the sampling cutoff and back flushing control valve bodies; when the device parts need to be overhauled later, the device parts can be disassembled quickly, and the parts can be cleaned and replaced conveniently, so that the operation and maintenance labor cost and danger are greatly reduced.

[0034] During actual use, the sample gas enters the device through the sampling rod 101, and before this, the sample gas is preliminarily filtered through the pre-filter 201 to remove large-particle impurities; the sample gas enters the built-in filter 202 through the gas inlet 1022 at the front end of the adapter pipe 102, and then the sample gas is further filtered to remove small-particle impurities and harmful substances; the filtered sample gas is discharged through the exhaust passage 106 and the sample gas outlet 107, and enters the sample gas analysis equipment connected with the sample gas outlet 107 for subsequent analysis through the exhaust joint connected with the sample gas outlet 107.

[0035] During the process, the power supply of the heater 104 can be turned on, and then the sample gas in the device is heated to prevent condensation; the sealing of the device is ensured through the sampling sealing ring 1011, the adapter sealing ring 1021, the pre-sealing ring 2012 and the post-sealing ring 2022 to prevent sample gas leakage.

[0036] It is worth noting that the whole device is controlled by the controller, and since the controller is a commonly used device and belongs to the existing mature technology, the electrical connection relationship and the specific circuit structure are not described herein.

[0037] It should be noted that the above embodiment is only used to illustrate the technical scheme of the present application, and is not limited. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical scheme of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical scheme of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A multi-stage filtration sampling device that is easy to maintain, characterized by: It includes a sampling mechanism (100) and a filtering mechanism (200); The sampling mechanism (100) comprises a sampling rod (101), the rear side of the sampling rod (101) is connected to a transfer tube (102), the transfer tube (102) is provided with a probe housing (103) on its outer shell, and a heater (104) is arranged on the outside of the probe housing (103); the rear side of the probe housing (103) is connected to a sealing cover (105), an exhaust channel (106) is provided in the sealing cover (105), and a sample gas outlet (107) in communication with the exhaust channel (106) is provided in the probe housing (103) at a position corresponding to the exhaust channel (106), and the sample gas outlet (107) is used to connect to an exhaust joint; The filtering mechanism (200) comprises a pre-filter (201) and a built-in filter (202), wherein the pre-filter (201) is arranged at the inlet of the sampling rod (101), and the built-in filter (202) is arranged in the probe housing (103), the tail end of the built-in filter (202) is connected to the sealing cover (105), and the tail end outlet of the built-in filter (202) is communicated with the exhaust channel (106).

2. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: The tail end of the sampling rod (101) is connected to the transfer tube (102), a sampling sealing ring (1011) is arranged at the connection between the sampling rod (101) and the transfer tube (102), and a transfer sealing ring (1021) is arranged at the connection between the end of the transfer tube (102) and the probe housing (103).

3. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: An air inlet (1022) that is narrow in front and wide in the back is arranged at a position of the transfer tube (102) corresponding to the sampling rod (101), and a built-in filter (202) is arranged on the inner side of the air inlet (1022).

4. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: A sealing gasket (1051) is arranged between the sealing cover (105) and the probe housing (103), and the sealing gasket (1051) is made of a high-temperature resistant material.

5. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: The probe housing (103) is provided with a mounting flange (110) and is connected to a main body base (108) via the mounting flange (110). The cross section of the main body base (108) is an "L"-shaped structure. A triangular rib (109) is provided in the inner recess of the main body base (108). The two outer right-angled surfaces of the triangular rib (109) are connected to the inner right-angled surface of the main body base (108), thereby enhancing the structural stability of the main body base (108).

6. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: An integrated pre-connecting portion (2011) is arranged on the rear side of the pre-filter (201), the pre-connecting portion (2011) is inserted into the front end inner cavity of the pre-filter (201), and a pre-sealing ring (2012) is arranged at the connection between the pre-connecting portion (2011) and the sampling rod (101).

7. The multi-stage filtration sampling device with easy maintenance as claimed in claim 1, characterized in that: An integrated rear connection portion (2021) is arranged at the rear end of the built-in filter (202), the rear connection portion (2021) is inserted into a corresponding slot of the sealing cover (105), and a rear sealing ring (2022) is arranged between the rear connection portion (2021) and the sealing cover (105).

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