High-pressure-resistant online filtering device

Abstract

The utility model provides a high-pressure-resistant online filtering device, and relates to the technical field of filtering devices.The high-pressure-resistant online filtering device comprises a shell and a filtering assembly arranged in the shell, through the design of a first connecting screw hole and a second connecting screw hole, connection with external adaptive equipment is facilitated, and the convenience of the filtering device is greatly improved; the filtering assembly comprises a first core head, a second core head and a filtering material, the filtering material is clamped by the first core head and the second core head, and the first core head and the second core head are clamped by the upper shell and the lower shell, so that high-pressure sealing is realized by manually screwing the upper shell and the lower shell on a shell with a smaller diameter, the sealing performance of the filtering device is greatly ensured, and the filtering efficiency is improved. Compared with the prior art, the high-pressure-resistant online filtering device has the advantages that other tools are not needed, the convenience of replacing the filtering assembly is improved, and in conclusion, the sealing reliability is greatly guaranteed while the convenience is obtained through the high-pressure-resistant online filtering device.

Description

Technical Field

[0001] The present application relates to the technical field of filtering devices, and in particular to a high-pressure resistant online filtering device. Background Art

[0002] In the field of liquid chromatography analysis, with the influence of factors such as the wear of the plunger seal, small particles or other impurities may fall into the sample injection valve along the pipeline. The mobile phase entering the liquid chromatography system and the tiny impurities in the analytical sample can easily cause the entire liquid chromatography instrument system to be blocked, resulting in an increase in system pressure; or the input liquid contains soluble impurities, which flow into the instrument and affect the test process or even damage the instrument.

[0003] The existing filter device is inconvenient to assemble and assemble, and it is difficult to achieve rapid high-pressure sealing. In the process of replacing the filter component, other tools may be needed, which makes it inconvenient to use. Utility Model Content

[0004] The embodiment of the present application provides a high-pressure resistant online filtering device, which greatly ensures the sealing reliability while achieving convenience, and solves the problems of the existing filtering devices, such as inconvenient assembly and difficulty in achieving rapid high-pressure sealing.

[0005] The embodiment of the present application provides a high-pressure resistant online filtering device, comprising a housing and a filtering assembly disposed inside the housing;

[0006] The housing comprises an upper housing and a lower housing which are screwed together, a sealed cavity is formed between the upper housing and the lower housing, and the filter assembly is arranged in the sealed cavity;

[0007] The upper shell is provided with a first sample inlet through hole connected to the sealed cavity, and the outer wall of the upper shell is provided with a first connecting screw hole connected to the first sample inlet through hole; the lower shell is provided with a first sample outlet through hole connected to the sealed cavity, and the outer wall of the lower shell is provided with a second connecting screw hole connected to the first sample outlet through hole;

[0008] The filter assembly comprises a first core head, a second core head and a filter material, the first core head is provided with a second sample inlet through hole in the middle, the second core head is provided with a second sample outlet through hole in the middle, and the first core head and the second core head clamp the filter material;

[0009] The upper shell and the lower shell clamp the first core head and the second core head; the first sample inlet through hole, the second sample inlet through hole, the second sample outlet through hole and the first sample outlet through hole are located correspondingly.

[0010] In a feasible implementation, the inner wall of the upper shell is provided with a first sealing limit groove connected to the first sample inlet through hole, and the inner wall of the lower shell is provided with a second sealing limit groove connected to the first sample outlet through hole;

[0011] The outer end of the first core head is provided with a first sealing limit head matching the first sealing limit groove, and the outer end of the second core head is provided with a second sealing limit head matching the second sealing limit groove;

[0012] When the upper shell and the lower shell clamp the first core head and the second core head, the first sealing limiting head is inserted into the first sealing limiting groove, and the second sealing limiting head is inserted into the second sealing limiting groove.

[0013] In a feasible implementation, the first sealing limit head and the second sealing limit head are both conical protrusions, and the first sealing limit groove and the second sealing limit groove are both conical grooves;

[0014] The second sample inlet through hole and the second sample outlet through hole both pass through the tapered end of the tapered protrusion.

[0015] In a feasible implementation, the upper shell includes an upper cylinder, a first connecting member and a first limiting member, the first connecting member includes a first connecting portion and a first clamping portion, and the first connecting portion and the first clamping portion are an integrated structure;

[0016] A through hole is provided at the top of the upper cylinder, the first connecting portion of the first connecting member passes through the through hole from the inside of the upper cylinder, the outer wall of the first clamping portion is clamped with the inner wall of the top of the upper cylinder, the first limiting member is provided on the first connecting portion, and the first limiting member is clamped with the outer wall of the upper cylinder;

[0017] The lower shell includes a lower cylinder, a second connecting member and a second limiting member, the second connecting member includes a second connecting portion and a second clamping portion, and the second connecting portion and the second clamping portion are an integrated structure;

[0018] A through hole is provided at the bottom end of the lower cylinder, the second connecting portion of the second connecting member passes through the through hole from the inside of the lower cylinder, the outer wall of the second clamping portion is clamped with the inner wall of the bottom end of the lower cylinder, the second limiting member is provided on the second connecting portion, and the second limiting member is clamped with the outer wall of the lower cylinder;

[0019] The end of the first clamping part and / or the second clamping part is provided with a first connecting groove, the upper cylinder is threadedly connected to the lower cylinder, the filter assembly is inserted into the first connecting groove, and the first clamping part and the second clamping part clamp the filter assembly.

[0020] In a feasible implementation, the upper shell and the lower shell are both integral structures;

[0021] The outer wall of the upper shell is provided with an external thread, the inner wall of the lower shell is provided with an internal thread, and the outer wall of the upper shell is screwed with the inner wall of the lower shell;

[0022] Or, the inner wall of the upper shell is provided with an internal thread, the outer wall of the lower shell is provided with an external thread, and the outer wall of the lower shell is threadedly connected to the inner wall of the upper shell;

[0023] The end of the upper shell and / or the lower shell is provided with a second connecting groove, the filter assembly is plugged into the second connecting groove, and the upper shell and the lower shell clamp the filter assembly.

[0024] In a feasible implementation, the upper shell and the lower shell are both integral structures, the outer wall of the upper shell is provided with an external thread, the inner wall of the lower shell is provided with an internal thread, and the inner wall of the lower shell is threadedly connected to the outer wall of the upper shell;

[0025] A third connecting groove is provided at the end of the lower shell, a fourth connecting groove is provided at the end of the upper shell, two ends of the filter assembly are respectively plugged into the third connecting groove and the fourth connecting groove, and the upper shell and the lower shell clamp the filter assembly.

[0026] In a feasible implementation, the filter assembly further includes a core sleeve, the first core head and the second core head clamp the filter material, and the core sleeve sleeves the first core head, the filter material and the second core head.

[0027] In a feasible implementation, the end surface of the first core head and / or the second core head is provided with a groove, and the filter material is inserted into the groove.

[0028] In a feasible implementation, the first core head further includes a first plate body and a collar, the first sealing limiter is arranged on one side of the first plate body, the collar is arranged on the other side of the first plate body, and the second injection through hole passes through the first sealing limiter and the first plate body;

[0029] The second core head further includes a second plate body and a column body, the second sealing limiter head is arranged on one side of the second plate body, the column body is arranged on the other side of the second plate body, and the second sample outlet hole passes through the second sealing limiter head and the second plate body;

[0030] The filter material is arranged in the ring, the column is inserted into the ring, the end face of the ring abuts against the outer wall of the second plate, the first plate, the ring, the second plate and the column constitute an inner cavity, and the filter material is located in the inner cavity.

[0031] In a feasible implementation, the filter assembly further includes a cover body and a sleeve;

[0032] A circular hole is provided at the end of the cover body, and the two cover bodies are respectively sleeved with the first core head and the second core head, and the first sealing limit head and the second sealing limit head both pass through the adjacent circular holes;

[0033] The sleeve comprises an outer sleeve and an annular plate, wherein the annular plate is fixedly arranged at the end of the outer sleeve, and the outer sleeve is sleeved with the two covers;

[0034] The annular plate is inserted into the third connecting groove, and the circumferential surface of the annular plate is in contact with the inner wall of the third connecting groove; the outer cylinder is inserted into the fourth connecting groove, and the outer wall of the outer cylinder is in contact with the inner wall of the fourth connecting groove.

[0035] An embodiment of the present application provides a high-pressure resistant online filtering device, which is convenient for connection with an external adapter device by providing a first sample inlet through hole in the upper shell, providing a first connecting screw hole connected to the first sample inlet through hole on the outer wall of the upper shell, providing a first sample outlet through hole in the lower shell, and providing a second connecting screw hole connected to the first sample outlet through hole on the outer wall of the lower shell. The first connecting screw hole and the second connecting screw hole are designed to facilitate connection with an external adapter device, thereby greatly improving the convenience of the filtering device;

[0036] The filter assembly includes a first core head, a second core head and a filter material, the first core head and the second core head clamp the filter material, and the upper shell and the lower shell clamp the first core head and the second core head, so that on a shell with a smaller diameter, high-pressure sealing is achieved by manually tightening the upper shell and the lower shell, which greatly ensures the sealing of the filter device, does not require the use of other tools, and improves the convenience of replacing the filter assembly;

[0037] In summary, the high-pressure resistant online filtering device provided in the present application achieves convenience while greatly ensuring sealing reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural schematic diagram of a high-pressure resistant online filtration device provided in the present application;

[0039] Figure 2 is a cross-sectional view of a high-pressure resistant online filtration device provided by the present application;

[0040] Figure 3 is a schematic diagram of the structure of the filter component;

[0041] Figure 4 is a cross-sectional view of another high pressure resistant in-line filtration device;

[0042] Figure 5is a schematic diagram of the structure of the filter component;

[0043] Figure 6 is a cross-sectional view of another high pressure resistant online filtration device;

[0044] Figure 7 is a schematic diagram of the structure of another filter component;

[0045] Figure 8 It is a structural schematic diagram of another filtering component.

[0046] Description of reference numerals:

[0047] 1-housing; 2-filter assembly;

[0048] 11-upper shell; 12-lower shell; 13-sealed cavity; 14-first connecting groove; 15-second connecting groove; 16-third connecting groove; 17-fourth connecting groove; 21-first core head; 22-second core head; 23-filter material; 24-core sleeve; 25-cover body; 26-sleeve;

[0049] 111-first sample inlet hole; 112-first connecting screw hole; 113-first sealing limit groove; 114-upper cylinder; 115-first connecting piece; 116-first limit piece; 121-first sample outlet hole; 122-second connecting screw hole; 123-second sealing limit groove; 124-lower cylinder; 125-second connecting piece; 126-second limit piece; 211-second sample inlet hole; 212-first sealing limit head; 213-first plate; 214-ring; 221-second sample outlet hole; 222-second sealing limit head; 223-second plate; 224-column; 261-outer cylinder; 262-annular plate. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application.

[0051] In the field of liquid chromatography analysis, with the influence of factors such as the wear of the plunger seal, small particles or other impurities may fall into the sample injection valve along the pipeline. The mobile phase entering the liquid chromatography system and the tiny impurities in the analytical sample can easily cause the entire liquid chromatography instrument system to be blocked, resulting in an increase in system pressure; or the input liquid contains soluble impurities, which flow into the instrument and affect the test process or even damage the instrument.

[0052] Therefore, an online filtration device is needed to filter impurities in the mobile phase and sample and protect the liquid chromatography instrument system. However, the existing filtration devices are inconvenient to assemble and assemble, and it is difficult to achieve rapid high-pressure sealing. When connecting with other equipment, other tools may be needed, which makes it inconvenient to use.

[0053] The high-pressure resistant online filtering device provided in the present application can be quickly assembled and connected with the adapter equipment and realize high-pressure sealing, which greatly improves the convenience of the filtering device.

[0054] The specific structure of the high-pressure resistant online filtering device provided by the present application is described in detail below in conjunction with the accompanying drawings.

[0055] Reference Figure 1-Figure 8 As shown, the embodiment of the present application provides a high-pressure resistant online filtering device, comprising a housing 1 and a filtering assembly 2 disposed inside the housing 1;

[0056] The housing 1 comprises an upper housing 11 and a lower housing 12 which are screwed together, a sealed cavity 13 is formed between the upper housing 11 and the lower housing 12, and the filter assembly 2 is disposed in the sealed cavity 13;

[0057] The outer walls of the upper shell 11 and the lower shell 12 are provided with opposite sides, four sides, six sides and other structures to assist in connecting the filter device to a universal joint assembly. The surfaces of the upper shell 11 and the lower shell 12 are also provided with structures such as protrusions, depressions, knurling, etc. to increase the surface roughness and improve the torque when twisting by hand.

[0058] A first sample inlet through hole 111 communicating with the sealed cavity 13 is provided in the upper shell 11, and a first connecting screw hole 112 communicating with the first sample inlet through hole 111 is provided on the outer wall of the upper shell 11; a first sample outlet through hole 121 communicating with the sealed cavity 13 is provided in the lower shell 12, and a second connecting screw hole 122 communicating with the first sample outlet through hole 121 is provided on the outer wall of the lower shell 12. The design of the first connecting screw hole 112 and the second connecting screw hole 122 facilitates connection with an external adapter device, greatly improving the convenience of the filtering device;

[0059] The filter assembly 2 includes a first core head 21, a second core head 22 and a filter material 23. The filter material 23 is a filter membrane, a sieve plate filter disc, a particle filler, or a combination of one or more. A second sample inlet through hole 211 is provided in the middle of the first core head 21, and a second sample outlet through hole 221 is provided in the middle of the second core head 22. The first core head 21 and the second core head 22 clamp the filter material 23. Both the first core head 21 and the second core head 22 can be made of corrosion-resistant flexible materials.

[0060] The upper shell 11 and the lower shell 12 clamp the first core head 21 and the second core head 22, so that on the shell 1 with a smaller diameter, high-pressure sealing can be achieved by manually tightening the upper shell 11 and the lower shell 12, which greatly ensures the sealing performance of the filtering device; the first sample inlet through hole 111, the second sample inlet through hole 211, the second sample outlet through hole 221 and the first sample outlet through hole 121 are located in corresponding positions to form a sample liquid filtration channel, and the filter material 23 is located between the second sample inlet through hole 211 and the second sample outlet through hole 221. When the sample liquid flows through the sample liquid filtration channel, small particles and other impurities are filtered out of the sample liquid through the filter material 23.

[0061] Reference Figure 2-Figure 8 As shown, in some embodiments, the inner wall of the upper shell 11 is provided with a first sealing limit groove 113 connected to the first sample inlet through hole 111, and the inner wall of the lower shell 12 is provided with a second sealing limit groove 123 connected to the first sample outlet through hole 121;

[0062] The outer end of the first core head 21 is provided with a first sealing stopper 212 matching the first sealing stopper groove 113, and the outer end of the second core head 22 is provided with a second sealing stopper groove 123 matching the second sealing stopper groove 123;

[0063] When the upper shell 11 and the lower shell 12 clamp the first core head 21 and the second core head 22, the first sealing limit head 212 is inserted into the first sealing limit groove 113, and the second sealing limit head 222 is inserted into the second sealing limit groove 123, so that the first core head 21 and the second core head 22 stably clamp the filter material 23.

[0064] Further, in some embodiments, the first sealing stopper 212 and the second sealing stopper 222 are both conical protrusions, the first sealing stopper 212 is coaxial with the second sample inlet through hole 211, and the second sealing stopper 222 is coaxial with the second sample outlet through hole 221, that is, the second sample inlet through hole 211 and the second sample outlet through hole 221 both pass through the conical end of the conical protrusion, the first sealing stopper groove 113 and the second sealing stopper groove 123 are both conical grooves, the first sample inlet through hole 111 is coaxial with the conical first sealing stopper groove 113, and the first sample outlet through hole 121 is coaxial with the conical second sealing stopper groove 123;

[0065] When the upper shell 11 and the lower shell 12 clamp the first core head 21 and the second core head 22, the outer wall of the first sealing stopper 212 is slidably connected to the inner wall of the first sealing stopper groove 113, and the outer wall of the second sealing stopper 222 is slidably connected to the inner wall of the second sealing stopper groove 123, thereby automatically adjusting the positions of the first core head 21 and the second core head 22, so that the upper shell 11, the first core head 21, the second core head 22 and the lower shell 12 are automatically aligned, so that the positions of the first sample inlet through hole 111, the second sample inlet through hole 211, the second sample outlet through hole 221 and the first sample outlet through hole 121 correspond. In addition, the conical design of the sealing stopper and the sealing stopper groove can improve the stability and sealing performance of the filter assembly 2.

[0066] Reference Figure 1 and Figure 2 As shown, in some embodiments, the upper shell 11 includes an upper cylinder 114, a first connecting member 115 and a first stopper 116, and the first connecting member 115 includes a first connecting portion and a first clamping portion. Figure 2 A is the first connecting part, B is the first clamping part, and the first connecting part and the first clamping part are an integrated structure;

[0067] The open end of the upper cylinder 114 is vertically downward, and a through hole is provided at the top of the upper cylinder 114. The inner diameter of the through hole is smaller than the inner diameter of the upper cylinder 114. The first connecting portion of the first connecting member 115 passes through the through hole from the inside of the upper cylinder 114, and the outer wall of the first clamping portion is clamped with the inner wall of the top end of the upper cylinder 114. Both the first connecting portion and the first clamping portion can be columnar structures. The diameter of the first connecting portion matches the through hole, and the diameter of the first clamping portion matches the inner diameter of the upper cylinder 114. When the first connecting portion passes through the through hole from the inside of the upper cylinder 114, the outer wall of the top end of the first clamping portion is clamped with the inner wall of the top end of the upper cylinder 114.

[0068] The first stopper 116 can be a collar, and the first stopper 116 is arranged on the first connecting portion, and an annular groove is arranged on the outer wall of the first connecting portion, and the first stopper 116 is clamped in the annular groove, and the lower surface of the first stopper 116 is clamped with the outer wall of the top end of the upper cylinder 114, so that the upper cylinder 114, the first connecting member 115 and the first stopper 116 are stably connected;

[0069] The structure of the lower shell 12 is completely the same as that of the upper shell 11. The lower shell 12 includes a lower cylinder 124, a second connecting member 125 and a second stopper 126. The second connecting member 125 includes a second connecting portion and a second clamping portion. The second connecting portion and the second clamping portion are an integrated structure.

[0070] The top of the lower cylinder 124 is open, and a through hole is provided at the bottom of the lower cylinder 124. The through hole is a circular through hole, and its inner diameter is smaller than the inner diameter of the lower cylinder 124. The second connecting portion of the second connecting member 125 passes through the through hole from the inside of the lower cylinder 124, and the outer wall of the second clamping portion is clamped with the inner wall of the bottom end of the lower cylinder 124. Both the second connecting portion and the second clamping portion can be cylindrical, and the outer diameter of the second connecting portion matches the inner diameter of the through hole, and the outer diameter of the second clamping portion matches the inner diameter of the lower cylinder 124. When the second connecting portion passes through the through hole from the inside of the lower cylinder 124, the outer wall of the bottom end of the second clamping portion is clamped with the inner wall of the bottom end of the lower cylinder 124.

[0071] The second stopper 126 is an annular structure, and is disposed on the second connecting portion. An annular groove is disposed on the outer wall of the second connecting portion, and the second stopper 126 is clamped in the annular groove. The upper surface of the second stopper 126 is clamped with the outer wall of the bottom end of the lower cylinder 124, so that the lower cylinder 124, the second connecting member 125 and the second stopper 126 are stably connected.

[0072] The upper cylinder 114 and the lower cylinder 124 are screwed together, the first sample inlet through hole 111 and the first sealing limit groove 113 are arranged in the first connecting member 115 , and the first sample outlet through hole 121 and the second sealing limit groove 123 are arranged in the second connecting member 125 .

[0073] The first connecting groove 14 is provided at the end of the first clamping part and / or the second clamping part. The first connecting groove 14 is a circular blind groove. The first connecting groove 14 matches the filter assembly 2. The upper cylinder 114 and the lower cylinder 124 are screwed together. One end of the filter assembly 2 is plugged into the first connecting groove 14. The first clamping part and the second clamping part clamp the filter assembly 2.

[0074] like Figure 2 As shown, the top of the second clamping part is provided with a first connecting groove 14, the bottom end of the filter assembly 2 is inserted into the first connecting groove 14, and after the upper cylinder 114 and the lower cylinder 124 are screwed together, the first clamping part and the second clamping part are clamped.

[0075] Reference Figure 4 and Figure 6 As shown, in some embodiments, the upper shell 11 and the lower shell 12 are both integral structures;

[0076] The outer wall of the upper shell 11 is provided with an external thread, and the inner wall of the lower shell 12 is provided with an internal thread. The outer wall of the upper shell 11 and the inner wall of the lower shell 12 are screwed together;

[0077] Or, the inner wall of the upper shell 11 is provided with an internal thread, the outer wall of the lower shell 12 is provided with an external thread, and the outer wall of the lower shell 12 is screwed to the inner wall of the upper shell 11;

[0078] The end of the upper shell 11 and / or the lower shell 12 is provided with a second connecting groove 15, the second connecting groove 15 is a circular groove, the filter assembly 2 is plugged into the second connecting groove 15, and the upper shell 11 and the lower shell 12 clamp the filter assembly 2;

[0079] like Figure 4 As shown, a second connecting groove 15 is provided at the end of the lower shell 12, and the bottom end of the filter assembly 2 is inserted into the second connecting groove 15. When the upper shell 11 and the lower shell 12 are tightened, the filter assembly 2 is clamped to be stably fixed.

[0080] Reference Figure 6 As shown, in some embodiments, the upper shell 11 and the lower shell 12 are both integral structures, the outer wall of the upper shell 11 is provided with an external thread, the inner wall of the lower shell 12 is provided with an internal thread, and the inner wall of the lower shell 12 is screwed to the outer wall of the upper shell 11;

[0081] A third connecting groove 16 is provided at the end of the lower shell 12, and a fourth connecting groove 17 is provided at the end of the upper shell 11. Both the third connecting groove 16 and the fourth connecting groove 17 can be circular blind grooves. The bottom end of the filter component 2 is plugged into the third connecting groove 16, and the top end of the filter component 2 is plugged into the fourth connecting groove 17. The upper shell 11 and the lower shell 12 clamp the filter component 2.

[0082] Reference Figure 7 As shown, in some embodiments, the filter assembly 2 also includes a core sleeve 24, which is an annular sleeve. The core sleeve 24 is made of corrosion-resistant metal material. The outer contours of the first core head 21 and the second core head 22 are both circular and match the inner wall of the core sleeve 24. The first core head 21 and the second core head 22 clamp the filter material 23. The core sleeve 24 is sleeved on the first core head 21, the filter material 23 and the second core head 22. The core sleeve 24, the first core head 21 and the second core head 22 completely wrap the filter material 23.

[0083] Reference Figure 2 As shown, in some embodiments, the end surface of the first core head 21 and / or the second core head 22 is provided with a groove, which may be a circular blind groove, and the filter material 23 is inserted into the groove;

[0084] exist Figure 3 In the embodiment, a groove is provided in the middle of the lower surface of the first core head 21, and the upper end of the filter material 23 is inserted into the groove. The height of the filter material 23 is slightly greater than the depth of the groove, so that the first core head 21 and the second core head 22 can clamp the material.

[0085] Reference Figure 5As shown, in some embodiments, the first core head 21 further includes a first plate body 213 and a collar 214, the first plate body 213 may be a circular plate body, the collar 214 is a circular ring structure, the first sealing stopper 212 is arranged on the upper surface of the first plate body 213, the collar 214 is arranged on the lower surface of the first plate body 213, and the first sealing stopper 212, the first plate body 213 and the collar 214 are coaxial, and the second injection through hole 211 passes through the first sealing stopper 212 and the first plate body 213;

[0086] The second core head 22 also includes a second plate 223 and a column 224, the second plate 223 is a circular plate, the column 224 is a cylindrical body, the second sealing limiter 222 is arranged on the lower surface of the second plate 223, the column 224 is arranged on the upper surface of the second plate 223, and the second sealing limiter 222, the second plate 223 and the column 224 are adjusted, and the second sample outlet hole 221 passes through the second sealing limiter 222 and the second plate 223;

[0087] The filter material 23 is arranged in the ring 214, the column 224 is inserted into the ring 214, and the end surface of the ring 214 abuts against the outer wall of the second plate 223. The first plate 213, the ring 214, the second plate 223 and the column 224 constitute an inner cavity, and the filter material 23 is located in the inner cavity.

[0088] Reference Figure 6 As shown, in some embodiments, the filter assembly 2 further includes a cover body 25 and a sleeve 26, the two cover bodies 25 are respectively sleeved with the first core head 21 and the second core head 22, and the sleeve 26 is sleeved with the two cover bodies 25;

[0089] The open ends of the two covers 25 are arranged opposite to each other, and the sealed ends of the two covers 25 are provided with circular holes. The two covers 25 are respectively sleeved with the first core head 21 and the second core head 22, and the first sealing stopper 212 and the second sealing stopper 222 both penetrate the adjacent circular holes;

[0090] The sleeve 26 includes an outer sleeve 261 and an annular plate 262. The outer sleeve 261 is an annular sleeve. The central hole of the annular plate 262 corresponds to the sample liquid filtering channel. The annular plate 262 is fixedly arranged at the end of the outer sleeve 261. The outer sleeve 261 is sleeved with two covers 25.

[0091] The annular plate 262 is inserted into the third connecting groove 16, and the circumferential surface of the annular plate 262 fits with the inner wall of the third connecting groove 16; the outer cylinder 261 is inserted into the fourth connecting groove 17, and the outer wall of the outer cylinder 261 fits with the inner wall of the fourth connecting groove 17, so that the filter assembly 2 is stably fixed.

[0092] The embodiment of the present application provides a high-pressure resistant online filtering device, by providing a first sample inlet through hole 111 in the upper shell 11, providing a first connecting screw hole 112 connected to the first sample inlet through hole 111 on the outer wall of the upper shell 11, providing a first sample outlet through hole 121 in the lower shell 12, and providing a second connecting screw hole 122 connected to the first sample outlet through hole 121 on the outer wall of the lower shell 12. The first connecting screw hole 112 and the second connecting screw hole 122 are designed to facilitate connection with an external adapter device, thereby greatly improving the convenience of the filtering device;

[0093] The filter assembly 2 includes a first core head 21, a second core head 22 and a filter material 23. The first core head 21 and the second core head 22 clamp the filter material 23. The upper shell 11 and the lower shell 12 clamp the first core head 21 and the second core head 22, so that on the shell 1 with a smaller diameter, high-pressure sealing is achieved by manually tightening the upper shell 11 and the lower shell 12, which greatly ensures the sealing performance of the filter device.

[0094] In summary, the high-pressure resistant online filtering device provided in the present application achieves convenience while greatly ensuring sealing reliability.

[0095] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application to obtain other embodiments based on the several embodiments provided in the present application, and these embodiments do not exceed the protection scope of the present application.

[0096] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not used to limit the protection scope of the embodiments of the present application. Any modifications, equivalent substitutions, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the protection scope of the embodiments of the present application.

Claims

1. A high pressure resistant online filtering device, characterized in that: It comprises a housing (1) and a filter assembly (2) arranged inside the housing (1); The housing (1) comprises an upper housing (11) and a lower housing (12) which are screwed together, a sealed cavity (13) is formed between the upper housing (11) and the lower housing (12), and the filter assembly (2) is arranged in the sealed cavity (13); The upper shell (11) is provided with a first sample inlet through hole (111) in communication with the sealed cavity (13), and the outer wall of the upper shell (11) is provided with a first connecting screw hole (112) in communication with the first sample inlet through hole (111); the lower shell (12) is provided with a first sample outlet through hole (121) in communication with the sealed cavity (13), and the outer wall of the lower shell (12) is provided with a second connecting screw hole (122) in communication with the first sample outlet through hole (121); The filter assembly (2) comprises a first core head (21), a second core head (22) and a filter material (23); a second sample inlet through hole (211) is provided in the middle of the first core head (21); a second sample outlet through hole (221) is provided in the middle of the second core head (22); the first core head (21) and the second core head (22) clamp the filter material (23); The upper shell (11) and the lower shell (12) clamp the first core head (21) and the second core head (22); the first sample inlet through hole (111), the second sample inlet through hole (211), the second sample outlet through hole (221), and the first sample outlet through hole (121) are located in corresponding positions.

2. The high pressure resistant online filtering device according to claim 1, characterized in that: The inner wall of the upper shell (11) is provided with a first sealing limit groove (113) connected to the first sample inlet through hole (111), and the inner wall of the lower shell (12) is provided with a second sealing limit groove (123) connected to the first sample outlet through hole (121); The outer end of the first core head (21) is provided with a first sealing limit head (212) matching the first sealing limit groove (113), and the outer end of the second core head (22) is provided with a second sealing limit head (222) matching the second sealing limit groove (123); When the upper shell (11) and the lower shell (12) clamp the first core head (21) and the second core head (22), the first sealing limit head (212) is plugged into the first sealing limit groove (113), and the second sealing limit head (222) is plugged into the second sealing limit groove (123).

3. The high pressure resistant online filtering device according to claim 2, characterized in that: The first sealing limit head (212) and the second sealing limit head (222) are both conical protrusions, and the first sealing limit groove (113) and the second sealing limit groove (123) are both conical grooves; The second sample inlet through hole (211) and the second sample outlet through hole (221) both pass through the tapered end of the tapered protrusion.

4. The high pressure resistant online filtering device according to claim 3, characterized in that: The upper shell (11) comprises an upper cylinder (114), a first connecting member (115) and a first limiting member (116); the first connecting member (115) comprises a first connecting portion and a first clamping portion; the first connecting portion and the first clamping portion are an integral structure; A through hole is provided at the top end of the upper cylinder (114); the first connecting portion of the first connecting member (115) passes through the through hole from the inside of the upper cylinder (114); the outer wall of the first clamping portion is clamped with the inner wall of the top end of the upper cylinder (114); the first limiting member (116) is provided on the first connecting portion; and the first limiting member (116) is clamped with the outer wall of the upper cylinder (114); The lower shell (12) comprises a lower cylinder (124), a second connecting member (125) and a second limiting member (126); the second connecting member (125) comprises a second connecting portion and a second clamping portion; the second connecting portion and the second clamping portion are an integral structure; A through hole is provided at the bottom end of the lower cylinder (124); the second connecting portion of the second connecting member (125) passes through the through hole from the inside of the lower cylinder (124); the outer wall of the second clamping portion is clamped with the inner wall of the bottom end of the lower cylinder (124); the second limiting member (126) is provided on the second connecting portion; and the second limiting member (126) is clamped with the outer wall of the lower cylinder (124); A first connecting groove (14) is provided at the end of the first clamping portion and / or the second clamping portion, the upper cylinder (114) and the lower cylinder (124) are threadedly connected, the filter assembly (2) is plugged into the first connecting groove (14), and the first clamping portion and the second clamping portion clamp the filter assembly (2).

5. The high pressure resistant online filtering device according to claim 3, characterized in that: The upper shell (11) and the lower shell (12) are both integral structures; The outer wall of the upper shell (11) is provided with an external thread, the inner wall of the lower shell (12) is provided with an internal thread, and the outer wall of the upper shell (11) and the inner wall of the lower shell (12) are threadedly connected; Or, the inner wall of the upper shell (11) is provided with an internal thread, the outer wall of the lower shell (12) is provided with an external thread, and the outer wall of the lower shell (12) is threadedly connected to the inner wall of the upper shell (11); A second connection groove (15) is provided at the end of the upper shell (11) and / or the lower shell (12), the filter assembly (2) is plugged into the second connection groove (15), and the upper shell (11) and the lower shell (12) clamp the filter assembly (2).

6. The high pressure resistant online filtering device according to claim 3, characterized in that: The upper shell (11) and the lower shell (12) are both integral structures, the outer wall of the upper shell (11) is provided with an external thread, the inner wall of the lower shell (12) is provided with an internal thread, and the inner wall of the lower shell (12) is threadedly connected to the outer wall of the upper shell (11); A third connecting groove (16) is provided at the end of the lower shell (12), and a fourth connecting groove (17) is provided at the end of the upper shell (11); two ends of the filter assembly (2) are respectively plugged into the third connecting groove (16) and the fourth connecting groove (17); and the upper shell (11) and the lower shell (12) clamp the filter assembly (2).

7. The high pressure resistant online filtering device according to claim 4 or 5, characterized in that: The filter assembly (2) further comprises a core sleeve (24), the first core head (21) and the second core head (22) clamp the filter material (23), and the core sleeve (24) sleeves the first core head (21), the filter material (23) and the second core head (22).

8. The high pressure resistant online filtering device according to claim 7, characterized in that: The end surface of the first core head (21) and / or the second core head (22) is provided with a groove, and the filter material (23) is inserted into the groove.

9. The high pressure resistant online filtering device according to claim 4 or 5, characterized in that: The first core head (21) further comprises a first plate body (213) and a collar (214); the first sealing stopper (212) is arranged on one side of the first plate body (213); the collar (214) is arranged on the other side of the first plate body (213); and the second injection through hole (211) penetrates the first sealing stopper (212) and the first plate body (213); The second core head (22) further comprises a second plate body (223) and a column body (224); the second sealing limit head (222) is arranged on one side of the second plate body (223), the column body (224) is arranged on the other side of the second plate body (223), and the second sample outlet through hole (221) passes through the second sealing limit head (222) and the second plate body (223); The filter material (23) is arranged in the collar (214), the column (224) is inserted into the collar (214), the end surface of the collar (214) abuts against the outer wall of the second plate (223), the first plate (213), the collar (214), the second plate (223) and the column (224) form an inner cavity, and the filter material (23) is located in the inner cavity.

10. The high pressure resistant online filtering device according to claim 6, characterized in that: The filter assembly (2) further comprises a cover body (25) and a sleeve (26); A circular hole is provided at the end of the cover body (25); the two cover bodies (25) are respectively sleeved with the first core head (21) and the second core head (22); the first sealing limit head (212) and the second sealing limit head (222) both penetrate adjacent circular holes; The sleeve (26) comprises an outer sleeve (261) and an annular plate (262), wherein the annular plate (262) is fixedly arranged at the end of the outer sleeve (261), and the outer sleeve (261) is sleeved with the two cover bodies (25); The annular plate (262) is plugged into the third connecting groove (16), and the circumferential surface of the annular plate (262) fits in contact with the inner wall of the third connecting groove (16); the outer cylinder (261) is plugged into the fourth connecting groove (17), and the outer wall of the outer cylinder (261) fits in contact with the inner wall of the fourth connecting groove (17).

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