Gas-liquid sample multi-bypass filter

Abstract

The gas-liquid sample multi-bypass filter comprises a filter head, a filter bin, a sealing gasket, a filter support and a filter element, a sample inlet and a sample outlet are formed in the side wall of the filter head, a circulation opening is formed in the bottom wall of the filter head, the sealing gasket is arranged on the top wall of the circulation opening, and the filter bin is connected to the inner wall of the circulation opening. One end of the filter support is connected to the inner wall of the sample inlet, the other end of the filter support penetrates through the sealing gasket and extends into the filter bin, the filter element is sleeved on the outer wall of one end of the filter support extending into the filter bin, and a filter cavity is formed between the outer wall of the filter bin and the sealing surface of the sealing gasket; the sample outlet is communicated with the inner cavity of the filter bin through the filter element and the filter cavity; at least one bypass sample outlet communicated with the inner cavity of the filter bin is formed in the outer wall of the filter head. According to the utility model, the working condition filtering requirements of gas and liquid samples can be simultaneously met, a plurality of bypass ports are additionally arranged, and the pipeline design of a small-space sample pretreatment system is optimized.

Description

Technical Field

[0001] The utility model relates to a gas-liquid sample multi-bypass filter, belonging to the technical field of online analysis equipment. Background Art

[0002] Sample pretreatment refers to eliminating interfering factors, completely retaining the components to be tested, and concentrating the components to be tested in order to obtain reliable analysis results.

[0003] In the common sample pretreatment systems on the market, the working conditions of most samples are not the same. Due to the differences in the physical and chemical properties of gases and liquids, as well as their different requirements on analytical instruments, sample pretreatment equipment cannot be used for the analysis of gases and liquids at the same time. In fact, different analytical instruments (such as gas chromatography and liquid chromatography) have different requirements for sample pretreatment, which means that different pretreatment methods are needed to prepare gas and liquid samples to ensure the accuracy and reliability of the analysis. This also leads to the fact that there are few devices on the market that can simultaneously realize the online analysis function of two forms of samples, and the online analysis of multiple forms of samples through multiple devices will lead to more types of equipment maintenance, low efficiency and difficulty in ensuring the synchronization of sample quality.

[0004] To this end, it is necessary to develop a multi-bypass filter that is suitable for both gas and liquid sample pretreatment systems. It is mainly aimed at online analysis points where gas and liquid samples appear at the same time, reducing the types of maintenance spare parts, improving maintenance efficiency, ensuring sample quality, and improving the applicability of the same product in the pretreatment system. In addition, multiple bypass ports are added to optimize the pipeline design of the sample pretreatment system in a small space. At the same time, the difficulty and time of pretreatment maintenance operations are improved, and the overall work efficiency and stability of the pretreatment system are improved. Utility Model Content

[0005] The purpose of the utility model is to provide a filter that can meet the filtering requirements of gas and liquid sample working conditions at the same time and has a redundant bypass design, thereby improving the overall working efficiency and stability of the pretreatment system.

[0006] 20. The air filter assembly of claim 19, wherein the filter is constructed so that the filter assembly can be easily installed and operated. The filter assembly includes a first port, a second port, and a second port. The filter assembly includes a first port, a second port, and a second port. The filter assembly includes a first port, a second port, and a second port. The filter assembly includes a first port, a second port, and a second port. The first port, the second port, and the second port are connected to each other via a filter.

[0007] At least one bypass sample outlet is provided on the outer wall of the filter head on the side away from the flow port, and the bypass sample outlet is communicated with the inner cavity of the filter chamber.

[0008] Preferably, an external thread is provided on the outer wall of one end of the filter cartridge connected to the flow port, a thread groove adapted to the external thread is provided on the inner wall of the flow port, and an external hexagonal block is provided on the end face of the filter cartridge away from the filter head.

[0009] Preferably, a flow gap is formed between the end surface of the filter cartridge and the top wall of the flow port, and the bypass sample outlet is connected to the inner cavity of the filter cartridge through the flow gap.

[0010] Preferably, the filter bracket is cylindrical, and the filter bracket includes a connecting part, a first boss and a second boss. One end of the connecting part is threadedly connected to the inner wall of the injection port and the other end is coaxially connected to the first boss. The end of the first boss away from the connecting part is coaxially connected to the second boss. The outer diameters of the connecting part, the first boss and the second boss increase successively. The filter element is sleeved on the outer wall of the first boss and is positioned between the second boss and the side wall of the sealing gasket.

[0011] Furthermore, a plurality of supporting prisms for supporting the filter element are evenly spaced on the outer wall of the connecting portion.

[0012] Preferably, internal thread grooves are provided on the inner walls of the sample inlet and the sample outlet openings.

[0013] Preferably, a sealing ring is embedded on the inner wall of the connection between the flow port and the filter bin.

[0014] Preferably, two bypass sample outlets are symmetrically arranged.

[0015] Preferably, the sealing gasket is made of metal.

[0016] The utility model provides a gas-liquid sample multi-bypass filter, which has the following advantages:

[0017] 1. The gas-liquid sample multi-bypass filter of the utility model has a sample inlet and outlet filter head, which contains a backup and a reserve sample bypass channel. Depending on the installation method, it can be applied to gas and liquid sample working conditions.

[0018] 2. The filter chamber of the utility model filter is connected to the filter head by threads, and an external hexagonal block is provided at the tail to facilitate the removal of the filter chamber. The split design allows for quick removal and installation.

[0019] 3. The metal filter element sealing gasket of the utility model ensures the sealing performance of the sealing surface of the filter element, filters large particles of foreign matter and prevents clogging in the event of accidental filter element damage.

[0020] 4. The utility model has an anti-clogging filter bracket with supporting prisms, so that the product can be adapted to a variety of filter elements to match different working conditions, reducing a large number of non-standard filter spare parts, standardizing products, reducing the difficulty of later maintenance, and stabilizing sample quality.

[0021] 5. The gas-liquid sample multi-bypass filter of the present invention can protect the safety and measurement accuracy of the entire flow path and subsequent detection equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic cross-sectional view of the explosion structure of a gas-liquid sample multi-bypass filter of the utility model;

[0023] Figure 2 This is a cross-sectional schematic diagram of the structure of the bypass sample outlet on the filter head of the utility model;

[0024] Figure 3 This is a schematic diagram of sample bypass circulation in a sample pretreatment state when a gas-liquid sample multi-bypass filter is vertically installed according to the present invention;

[0025] Figure 4 This is a schematic diagram of sample inlet and outlet flow in a sample pretreatment state when a gas-liquid sample multi-bypass filter is installed horizontally according to the utility model;

[0026] In the picture:

[0027] 1-Filter head; 11-Inlet; 12-Outlet; 13-Circulation port; 14-Bypass sample outlet; 2-Filter chamber; 21-External hexagonal block; 3-Sealing gasket; 4-Filter bracket; 41-Connecting part; 42-First boss; 43-Second boss; 5-Filter element; 6-Internal thread groove; 7-Filter cavity; 8-Circulation gap; 9-Supporting prism; 10-Sealing ring. DETAILED DESCRIPTION

[0028] The following will be combined with the accompanying drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this utility model, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technical personnel in this field without making creative efforts are within the scope of protection of this utility model.

[0029] Reference Figures 1-4 , a gas-liquid sample multi-bypass filter, comprising a filter head 1, a filter cartridge 2, a sealing gasket 3, a filter bracket 4 and a filter element 5, an inlet 11 and an outlet 12 are respectively provided on the two opposite side walls of the filter head 1, and an internal thread groove 6 is provided on the inner wall of the opening of the inlet 11 and the outlet 12 to connect the external inlet and outlet sample pipelines, a flow port 13 is provided on the bottom wall of the filter head 1, and the sealing gasket 3 is fixedly installed on the top wall of the flow port 13, the filter cartridge 2 is detachably connected to the inner wall of the flow port 13, and one end of the filter bracket 4 is detachably connected to the inlet A sealing gasket 3 is provided on the other end of the inner wall of the sample port 11 and extends into the filter cartridge 2. The filter bracket 4 is hollow and has openings at both ends. The filter element 5 is sleeved on the outer wall of one end of the filter bracket 4 extending into the filter cartridge 2 and forms a filter chamber 7 between the outer wall of the filter cartridge 2 and the sealing surface of the sealing gasket 3. The inner cavity of the filter cartridge 2 is connected to the filter chamber 7 through the filter element 5, and the sample outlet 12 is connected to the filter chamber 7 through the sealing gasket 3, thereby forming a filter passage. In this embodiment, the sealing gasket 3 is preferably made of metal, and the opening of the internal thread groove 6 is a prior art and will not be elaborated on.

[0030] In a further embodiment, a flow gap 8 is formed between the filter cartridge 2 and the top wall of the flow port 13, and at least one bypass sample outlet 14 is provided on the outer wall of the filter head 1 facing away from the flow port 13. In this embodiment, two bypass sample outlets 14 are preferably provided symmetrically, and the bypass sample outlet 14 is connected to the inner cavity of the filter cartridge 2 through the flow gap 8. When in use, excess sample will return to the sample pipeline from the bypass sample outlet 14 of the filter head 1. The redundant bypass design can be used for emergency bypass circulation design, such as high-pressure discharge.

[0031] Reference Figures 1-4 In a further embodiment, an external thread is integrally formed on the outer wall of one end of the filter cartridge 2 connected to the flow port 13, and a thread groove compatible with the external thread is provided on the inner wall of the flow port 13. An external hexagonal block 21 is integrally formed on the end surface of the filter cartridge 2 facing away from the filter head 1, realizing a split design of the filter cartridge 2 and the filter head 1 for quick disassembly and assembly.

[0032] Reference Figures 1-4The filter holder 4 is cylindrical and includes a coaxially arranged connecting portion 41, a first boss 42 and a second boss 43. One end of the connecting portion 41 is threadedly connected to the inner wall of the injection port 11 and the other end is integrally formed with a first boss 42. The end of the first boss 42 away from the connecting portion 41 is integrally formed with a second boss 43. The outer diameters of the connecting portion 41, the first boss 42 and the second boss 43 increase successively. The filter element 5 is coaxially sleeved on the outer wall of the first boss 42 and abuts against the second boss 43 and the side wall of the sealing gasket 3.

[0033] Furthermore, a plurality of supporting prisms 9 for supporting the filter element 5 are evenly spaced on the outer wall of the connecting portion 41 around the circumferential direction of the connecting portion 41 and along the axial direction of the connecting portion 41. The supporting prisms 9 and the connecting portion 41 are integrally formed to prevent blockage in the filter cavity 7, so that the product can be adapted to a variety of filter elements 5 to match different working conditions. At the same time, a large number of non-standard filter spare parts can be reduced, products can be standardized, the difficulty of later maintenance can be reduced, and the sample quality can be stabilized.

[0034] Reference Figures 1-4 In a further embodiment, a sealing ring 10 is embedded on the inner wall of the connection between the flow port 13 and the filter cartridge 2 to ensure the sealing of the connection between the filter cartridge 2 and the filter head 1.

[0035] The sample pretreatment working principle of the utility model's gas-liquid sample multi-bypass filter is as follows:

[0036] The sample enters from the sampling port 11, enters the through hole in the filter support bracket through the built-in pipeline of the filter head 1, and reaches the bottom of the filter cartridge 2. This design can keep the sample flowing into the filter cartridge 2 while pushing the sample previously retained in the filter cartridge 2.

[0037] Reference Figure 3 and Figure 4 In the case of gas samples, the gas-liquid sample multi-bypass filter needs to be installed vertically. The gas will rush into the bottom and then flow upward, ensuring that the filtering contact process between the sample and the filter element 5 is uniform, rather than just filtering a local area of ​​the filter element 5, causing the life of the filter element 5 to be overdrawn prematurely. The gas then passes through the metal sealing gasket 3 through the hollow part of the filter element 5 and the filter bracket 4 to reach the sample outlet 12.

[0038] Reference Figure 4 In the case of liquid samples, the gas-liquid sample multi-bypass filter needs to be installed horizontally to ensure that the liquid sample will flow evenly into the filter chamber 2 cavity of the filter. The sample inlet 11 is installed facing upwards and the sample outlet 12 is facing downwards. In this way, the liquid flows into the filter from top to bottom, allowing the sample to flow in the filter chamber, thereby improving the filtration efficiency and quality.

[0039] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form or substance. It should be pointed out that ordinary technicians in this technical field can make several improvements and supplements without departing from the present invention, and these improvements and supplements should also be considered as the scope of protection of the present invention. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the present invention, which are all equivalent embodiments of the present invention; at the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A gas-liquid sample multi-bypass filter, characterized in that: The invention comprises a filter head (1), a filter chamber (2), a sealing gasket (3), a filter bracket (4) and a filter element (5), wherein the filter head (1) is provided with an inlet (11) and an outlet (12) on two opposite side walls, a flow opening (13) is provided on the bottom wall of the filter head (1), the sealing gasket (3) is arranged on the top wall of the flow opening (13), the filter chamber (2) is detachably connected to the inner wall of the flow opening (13), and one end of the filter bracket (4) is detachably connected to the inlet. A sealing gasket (3) is provided on the other end of the inner wall of the port (11) and extends into the filter chamber (2); the filter bracket (4) is hollow and has openings at both ends; the filter element (5) is sleeved on the outer wall of one end of the filter bracket (4) extending into the filter chamber (2) and forms a filter chamber (7) between the outer wall of the filter chamber (2) and the sealing surface of the sealing gasket (3); the inner cavity of the filter chamber (2) and the filter chamber (7) are communicated through the filter element (5); and the sample outlet (12) and the filter chamber (7) are communicated through the sealing gasket (3); At least one bypass sample outlet (14) is provided on the outer wall of the filter head (1) facing away from the flow port (13), and the bypass sample outlet (14) is communicated with the inner cavity of the filter chamber (2).

2. A gas-liquid sample multi-bypass filter according to claim 1, characterized in that: An external thread is provided on the outer wall of one end of the filter chamber (2) connected to the circulation port (13), a thread groove adapted to the external thread is provided on the inner wall of the circulation port (13), and an external hexagonal block (21) is provided on the end surface of the filter chamber (2) facing away from the filter head (1).

3. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: A flow gap (8) is formed between the end surface of the filter cartridge (2) and the top wall of the flow port (13), and the bypass sample outlet (14) is connected to the inner cavity of the filter cartridge (2) through the flow gap (8).

4. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: The filter holder (4) is cylindrical and comprises a connecting portion (41), a first boss (42) and a second boss (43). One end of the connecting portion (41) is threadedly connected to the inner wall of the injection port (11) and the other end is coaxially connected to the first boss (42). One end of the first boss (42) facing away from the connecting portion (41) is coaxially connected to the second boss (43). The outer diameters of the connecting portion (41), the first boss (42) and the second boss (43) increase in sequence. The filter element (5) is sleeved on the outer wall of the first boss (42) and abuts against the second boss (43) and the side wall of the sealing gasket (3).

5. The gas-liquid sample multi-bypass filter according to claim 4, characterized in that: A plurality of supporting prisms (9) for supporting the filter element (5) are evenly spaced and arranged on the outer wall of the connecting portion (41).

6. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: Internal thread grooves (6) are provided on the inner walls of the openings of the sample inlet (11) and the sample outlet (12).

7. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: A sealing ring (10) is embedded on the inner wall of the connection between the flow port (13) and the filter bin (2).

8. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: The bypass sample outlets (14) are symmetrically arranged with two each.

9. The gas-liquid sample multi-bypass filter according to claim 1, characterized in that: The sealing gasket (3) is made of metal.

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