A phosphorus trifluoride filter

Abstract

The invention discloses a phosphorus trifluoride filter, comprising an outer shell, a filter element shell, and further comprising: a reciprocating recoil assembly, comprising a rocking piece and a guide seat, wherein when a fluid is introduced into the filter element shell, the filter element shell is squeezed toward the rocking piece on one side of the fluid flow direction, and when the fluid is cut off, the filter element shell swings left and right under the action of the rocking piece; a multi-baffle filter element structure, which is arranged in the filter element shell, the filter element shell is a diamond structure, and the multi-baffle filter element structure comprises a first feed filter, a first filter ring plate, a second feed filter cartridge, an outer ring baffle, a second closing plate, a second filter ring plate, and a retention frame; an outer bottom extraction structure, wherein a plurality of horizontal connecting frames are arranged at intervals at the lower end of the diamond structure, and the outer bottom extraction structure comprises a fixing seat, a plurality of elastic tubes, and a plurality of quick connectors. The invention cleans the filter membrane or the filter plate immediately after a single filtration, thereby improving the service life of the filter membrane or the filter plate and the filtration quality.

Description

Technical Field

[0001] The invention relates to a filter, in particular to a phosphorus trifluoride filter. Background Art

[0002] Phosphorus trifluoride can be used as a fluorinating agent. Phosphorus trifluoride can perform ion transfer and is used in the fields of electronics industry, battery manufacturing, polymer materials and catalysts. In semiconductor manufacturing, phosphorus trifluoride becomes plasma gas under the action of microwaves and is doped into semiconductors to significantly improve semiconductor performance. In the field of polymer materials, phosphorus trifluoride can be used as a reactant to synthesize fluorinated organic dithiophosphates, terephthalate esters and other polymer materials with excellent anti-corrosion properties. Phosphorus trifluoride is a gas at room temperature and needs to be condensed into a liquid at low temperature before filling. Before filling, it needs to be filtered again to ensure the purity of the filled product.

[0003] Traditional phosphorus trifluoride filter elements all use corrosion-resistant filter membranes to filter phosphorus trifluoride liquids in an osmotic filtering manner. However, the accuracy of such filter membranes is difficult to control. If the filter membrane is set finer, the front end load of the filter membrane is too large and is easily blocked. If the filter membrane is set coarser, small particles will leak through. Therefore, the prior art sets the filter membrane to multiple channels, from coarse to fine, to form multiple filter layers, thereby filtering out particles layer by layer to improve the purity of phosphorus trifluoride. Although this can improve the purity, the repeated and dense filter layers will not only affect the filtration efficiency, but also in the recoil stage, the multi-layer filter cloth will also hinder the recoil efficiency. The recoil effect of the front-end filter cloth is extremely poor, and the front-end filter cloth often cannot be recoiled clean.

[0004] Therefore, this case aims to provide a phosphorus trifluoride filter, which can not only form multi-stage, interval filtering, but also the entire filter element will automatically vibrate due to the loss of external pressure after filtration. The force after vibration will make the filter membrane automatically return the material and concentrate the return material to the bottom of the filter element. After a single filtration, the filter membrane or filter plate is immediately cleaned, thereby improving the life of the filter membrane or filter plate and the filtration quality. Summary of the invention

[0005] The present invention provides a phosphorus trifluoride filter, which can effectively solve the above problems.

[0006] The present invention is achieved in that:

[0007] A phosphorus trifluoride filter comprises an outer shell, wherein a feed end and a discharge end are respectively arranged at the left and right ends of the outer shell, wherein the feed end is connected to a liquid infusion tube, and the discharge end is connected to a filling pipe, and a filter element housing is further arranged inside the outer shell, wherein the phosphorus trifluoride filter further comprises:

[0008] A reciprocating recoil assembly, wherein a plurality of bosses are arranged on the inner side of the outer shell, and the reciprocating recoil assembly comprises a swinging member fixedly connected to the boss, wherein one end of the swinging member away from the boss is connected to the filter element housing, and a plurality of guide seats slidingly matched with the inner wall of the outer shell are fixedly connected to the outer side of the filter element housing, and when fluid is introduced into the filter element housing, the filter element housing is squeezed by the swinging member on the side of the fluid flow direction, and when the fluid flow is cut off, the filter element housing swings left and right under the action of the swinging member;

[0009] A multi-baffle filter element structure is arranged in the filter element housing, the filter element housing is a diamond-shaped structure, the multi-baffle filter element structure comprises a first feed filter cartridge movably connected to the feed end, the first feed filter cartridge is connected to the first closing plate, the first closing plate is fixedly connected to the outer side of the first closing plate with a first filter ring plate, the rear side of the first closing plate is connected to the second feed filter cartridge, the outer side of the middle position of the second feed filter cartridge is connected to an outer ring baffle, the end of the second feed filter cartridge is connected to the second closing plate, the outer side of the second closing plate is fixedly connected to the second filter ring plate, the filter element housing is in communication with the discharge end, a retention frame is further arranged at the inner side of the short symmetry axis of the diamond-shaped structure, some particles of the fluid flow through the middle position of the diamond-shaped structure and adhere to the retention frame, and the other end of the filter element housing is movably connected to the discharge end through a discharge slide pipe;

[0010] An outsole pull-out structure, wherein a plurality of horizontal connecting frames are spaced apart at the lower end of the diamond-shaped structure, wherein the outsole pull-out structure comprises a fixing seat fixed to the inner bottom of the outer shell, wherein a plurality of elastic tubes are arranged at the upper end of the fixing seat, and a plurality of quick connectors are arranged at the lower end of the fixing seat, and the quick connectors are connected to the suction structure.

[0011] As a further improvement, the rocking member includes a stabilizing head connected to the boss, and the stabilizing head is slidably sleeved on a limiting cavity tube in the direction of one side of the filter element housing. A spring is also sleeved on the outer side of the stabilizing head, one end of the spring is connected to the boss, and the other end of the boss is fixed to the limiting cavity tube.

[0012] As a further improvement, mounting frames are respectively provided at both ends of the filter element housing, and the mounting frames are fixedly connected to the limiting cavity tube.

[0013] As a further improvement, the inner wall of the outer shell is provided with a plurality of dovetail grooves, the guide seat is dovetail-shaped, and the guide seat is engaged with the dovetail grooves.

[0014] As a further improvement, the length of the second feed filter cartridge is twice that of the first feed filter cartridge, and both ends of the outer ring baffle extend to the vertices of the short symmetry axis of the filter element housing respectively.

[0015] As a further improvement, the retention frame includes a first retention member arranged on the left side of the outer ring baffle and a second retention member arranged on the right side of the outer ring baffle. The first retention member has the same structure as the second retention member, and the proportion of the first retention member is 1.5 times that of the second retention member.

[0016] As a further improvement, the first retention member includes a plurality of sets of inner oblique shafts and outer oblique shafts fixedly connected to the bottom of the inner part of the filter element housing, and the inner oblique shafts and the outer oblique shafts form an X-shaped structure.

[0017] As a further improvement, the fixing seat comprises a mounting seat fixed to the inner bottom of the outer shell, an angular limiting seat is arranged above the mounting seat, and the limiting seat is located at the bottom of the filter element shell.

[0018] As a further improvement, the elastic tube includes a butt joint connected to the quick connector, a corrugated tube is connected to the top of the butt joint, and the top of the corrugated tube is connected to a connecting tube plugged into the transverse connecting frame.

[0019] The beneficial effects of the present invention are:

[0020] When filtering, the existing filters will improve the accuracy of fluid filtration by gradually increasing the number and accuracy of filter plates or filter membranes. Although this can improve the accuracy of filtration, during the recoil processing stage, the impact force of the recoil structure at the end is already very small when it impacts the front end, resulting in the filter plate or filter membrane at the end being cleaned relatively cleanly, while the recoil effect of the filter plates or filter membranes at the front end and the middle section is extremely poor, and the utilization efficiency after cleaning is low. Therefore, the present invention divides the filtration area into a first feed filter cartridge, a first filter ring plate, a second feed filter cartridge, and a second filter ring plate through a multi-baffle filter element structure, so that the phosphorus trifluoride flowing into the filter can be filtered through at least four layers of filter layers with gradually increasing accuracy, and the single filtration area is smaller than the area of ​​the existing filter layer, thereby achieving multiple and small-area filtration, less impact on the recoil medium during the recoil stage, and better recoil effect.

[0021] In the position of the second feed filter cartridge, particles in phosphorus trifluoride will be intercepted by the retention frame. Therefore, the length of the second feed filter cartridge needs to be set longer, twice that of the first feed filter cartridge. Therefore, the length of the single-stage second feed filter cartridge separated by the outer ring baffle is actually equal to that of the first feed filter cartridge, and plays a similar filtering role during filtration.

[0022] During the filtration and retention process of the retention frame, it is divided into two parts, respectively on the left and right sides of the outer ring baffle. Although the locations are different, the structural composition is the same. Moreover, since the area where the first retention member is located contacts phosphorus trifluoride earlier, the setting ratio of the first retention member is greater than that of the second retention member.

[0023] When the first retention member retains particles, it retains the particles inside through a woven net structure composed of an inner oblique axis and an outer oblique axis. After being vibrated by the reciprocating recoil component, the particles can fall downward, thereby achieving the effect of retaining particles and quickly recovering them.

[0024] The existing backwashing method generally involves passing water for backwashing. However, since the filter in this case is horizontal, if water is passed for backwashing, when water remains in the filter, passing phosphorus trifluoride will easily lead to a violent reaction. Therefore, the present invention provides a reciprocating backwashing component based on the multi-baffle filter element structure. When phosphorus trifluoride is flushed into the filter element housing, the entire filter element housing will be pushed in the direction of fluid flow, so that the swing member on the right side is squeezed. When the supply source of phosphorus trifluoride is closed, the filter element housing loses pressure, the swing member will begin to reset, and start to swing left and right, driving the entire filter element housing to swing left and right. At this time, the residual phosphorus trifluoride is drawn out at the feed end, so that under the action of the external suction force and the left and right swinging force of the filter element housing, the particles blocked on the multi-baffle filter element structure will fall to the bottom of the filter element housing. Both the front filter end and the rear filter end can be subjected to a uniform swinging effect, so that the backwashing effect at each position can be formed, thereby improving the practical effect of the present invention.

[0025] When the rocking member swings, it needs to be reset after the introduced phosphorus trifluoride liquid loses pressure. At the same time, continuous rocking force is also required when it drives the filter element housing to shake. However, if only the spring is used to support and buffer the filter element housing, it is not enough to support the solid weight of the filter element. Therefore, the rocking member of the present invention is achieved by the cooperation of the limiting cavity and the stabilizing head, and the spring is loaded to the outside of the stabilizing head. The sliding cooperation of the limiting cavity and the stabilizing head is used as the support end, and the cooperation of the spring and the stabilizing head is used as the displacement end, thereby achieving both stable support and the effect of providing reciprocating support force.

[0026] In order to ensure that the filter element housing can always follow a fixed path when sliding, and not easily affect the cooperation between the limiting cavity tube and the stabilizing head, and the spring and the stabilizing head, the present invention opens a dovetail groove on the inner wall of the outer shell, and then sets the guide seat to a dovetail type, so that the filter element housing can always remain in a straight line when moving, making it more stable when moving.

[0027] After the multi-baffle filter element structure is recoiled, the particles will fall to the bottom of the filter element housing. At this time, it is difficult to extract the particles shaken down from the bottom by conventional air blowing, and the particles will be blocked by the closing plate or the outer ring baffle. Therefore, the present invention provides an outer bottom extraction structure on the basis of the multi-baffle filter element structure, so that the particles at the bottom of the filter element housing can be sucked into the fixed seat through the elastic tube, and transferred to the outside through the quick connector. Moreover, due to the elastic setting of the elastic tube, it can be deformed according to the displacement of the filter element housing, so as to realize dynamic extraction and extract the particles at the bottom of the inclined filter element housing. Compared with the traditional recoil, the inclined bottom suction method has better effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0030] Figure 2 It is a schematic diagram of the top structure of the present invention.

[0031] Figure 3 The present invention Figure 2 Cross-section view of AA.

[0032] Figure 4 The present invention Figure 2 Isometric section view of the middle AA.

[0033] Figure 5 It is a structural schematic diagram of the multi-baffle filter element structure of the present invention.

[0034] Figure 6 It is a structural schematic diagram of the swing member of the present invention.

[0035] Figure 7 It is a structural schematic diagram of the outer sole extraction structure of the present invention

[0036] In the figure:

[0037] Outer shell 1, feed end 101, discharge end 102, boss 103, filter element shell 2, cross connecting frame 201, mounting frame 202, reciprocating recoil assembly 3, rocking member 301, stabilizing head 3011, limiting cavity tube 3012, spring 3013, guide seat 302, multi-baffle filter element structure 4, first feed filter cartridge 401, first closing plate 402, first filter ring plate 403, second feed filter cartridge 404, outer The annular baffle 405, the second closing plate 406, the second filter ring plate 407, the retention frame 408, the first retention piece 4081, the inner oblique shaft 40801, the outer oblique shaft 40802, the second retention piece 4082, the discharge slide pipe 409, the outer bottom extraction structure 5, the fixing seat 501, the mounting seat 5011, the limiting seat 5012, the elastic tube 502, the butt tube 5021, the bellows 5022, and the connecting tube 5023. DETAILED DESCRIPTION

[0038] In order to make the embodiments of the present invention, all belong to the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0039] In the description of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as referring to the purpose, technical solutions and advantages of the methods. To be more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work indicate or imply relative importance or implicitly indicate the number of indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0040] Reference Figure 1 to Figure 7As shown, a phosphorus trifluoride filter comprises an outer shell 1, wherein the left and right ends of the outer shell 1 are respectively provided with a feed end 101 and a discharge end 102, wherein the feed end 101 is connected to a liquid infusion tube, and the discharge end 102 is connected to a filling pipe, and a filter element housing 2 is further provided inside the outer shell 1, and the phosphorus trifluoride filter further comprises: a reciprocating recoil assembly 3, wherein a plurality of groups of bosses 103 are provided on the inner side of the outer shell 1, and the reciprocating recoil assembly 3 comprises a rocking member 301 fixedly connected to the boss 103, wherein the rocking member 301 is away from the boss 103. One end is connected to the filter element housing 2, and the outer side of the filter element housing 2 is fixedly connected with a plurality of guide seats 302 that slide with the inner wall of the outer shell 1. When the fluid is passed into the filter element housing 2, the filter element housing 2 is squeezed by the rocking member 301 on the side of the fluid flow direction. When the fluid is cut off, the filter element housing 2 swings left and right under the action of the rocking member 301; a multi-baffle filter element structure 4 is arranged in the filter element housing 2, and the filter element housing 2 is a diamond structure. The multi-baffle filter element structure 4 includes a first feed filter cartridge 401 movably connected to the feed end 101. The first feed filter The cartridge 401 is connected to the first closing plate 402, the first closing plate 402 is fixedly connected to the outside of the first closing plate 402 with a first filter ring plate 403, the rear side of the first closing plate 402 is connected to the second feed filter cartridge 404, the middle part of the second feed filter cartridge 404 is connected to the outside of an outer ring baffle 405, the end of the second feed filter cartridge 404 is connected to the second closing plate 406, the second closing plate 406 is fixedly connected to the outside of the second filter ring plate 407, the filter element housing 2 is connected to the discharge end 102, and the inner side of the short symmetry axis of the rhombus structure is also provided with a hysteresis A retention frame 408, after the fluid flows through the middle position of the diamond structure, some particles adhere to the retention frame 408, and the other end of the filter element housing 2 is movably connected to the discharge end 102 through a discharge slide pipe 409; an outer bottom extraction structure 5, a plurality of horizontal connecting frames 201 are arranged at intervals at the lower end of the diamond structure, and the outer bottom extraction structure 5 includes a fixed seat 501 fixedly connected to the bottom of the inner part of the outer shell 1, a plurality of elastic tubes 502 are arranged at the upper end of the fixed seat 501, and a plurality of quick connectors are arranged at the lower end of the fixed seat 501, and the quick connectors are connected to the suction structure.

[0041] When filtering, the existing filters will improve the accuracy of fluid filtration by gradually increasing the number and accuracy of filter plates or filter membranes. Although this can improve the accuracy of filtration, during the recoil treatment stage, the impact force of the recoil structure at the end is already very small when it impacts the front end, resulting in the filter plate or filter membrane at the end being cleaned relatively cleanly, while the recoil effect of the filter plates or filter membranes at the front end and the middle section is extremely poor, and the utilization efficiency after cleaning is low. Therefore, the present invention divides the filtration area into a first feed filter cartridge 401, a first filter ring plate 403, a second feed filter cartridge 404, and a second filter ring plate 407 through the multi-baffle filter element structure 4 set up, so that the phosphorus trifluoride flowing into the filter can be filtered by at least four layers of filter layers with gradually increasing accuracy, and the single filtration area is smaller than the area of ​​the existing filter layer, thereby achieving multiple and small-area filtration, less impact on the recoil medium during the recoil stage, and better recoil effect.

[0042] In the position of the second feed filter cartridge 404, the particles in the phosphorus trifluoride will be intercepted by the retention frame 408. Therefore, the length of the second feed filter cartridge 404 in this embodiment is twice that of the first feed filter cartridge 401, and the two ends of the outer ring baffle 405 extend to the vertices of the short symmetry axis of the filter element housing 2 respectively. The length of the second feed filter cartridge 404 needs to be set longer, which is twice that of the first feed filter cartridge 401. Therefore, the length of the single-section second feed filter cartridge 404 separated by the outer ring baffle 405 is actually equal to that of the first feed filter cartridge 401, and plays a similar filtering role during filtration.

[0043] During the filtering and retention process of the retention frame 408, it is divided into two parts, respectively on the left and right sides of the outer ring baffle 405. Specifically, the retention frame 408 includes a first retention member 4081 arranged on the left side of the outer ring baffle 405 and a second retention member 4082 arranged on the right side of the outer ring baffle 405. The first retention member 4081 and the second retention member 4082 have the same structure, and the proportion of the first retention member 4081 is 1.5 times that of the second retention member 4082. Although the setting positions are different, the structural composition is the same, and because the area where the first retention member 4081 is located contacts phosphorus trifluoride earlier, the setting proportion of the first retention member 4081 is greater than that of the second retention member 4082.

[0044] When the first retention member 4081 retains particles, the first retention member 4081 includes a plurality of groups of inner inclined shafts 40801 and outer inclined shafts 40802 fixedly connected to the bottom of the filter element housing 2, and the inner inclined shafts 40801 and the outer inclined shafts 40802 form an X-shaped structure, which is a net-like structure composed of the inner inclined shafts 40801 and the outer inclined shafts 40802, so that the particles are retained therein, and after being vibrated by the reciprocating recoil component 3, the particles can fall downward, thereby achieving the effect of retaining particles and quickly recovering the particles.

[0045] The existing backwashing method generally uses water to backwash. However, since the filter of this case is horizontal, if water is used for backwashing, when water remains in the filter, the introduction of phosphorus trifluoride will easily lead to a violent reaction. Therefore, the present invention provides a reciprocating backwashing assembly 3 on the basis of the multi-baffle filter element structure 4. When phosphorus trifluoride is flushed into the filter element housing 2, the entire filter element housing 2 is pushed in the direction of fluid flow, so that the swing member 301 on the right is squeezed. When the supply source of phosphorus trifluoride is closed, the filter element housing 2 loses pressure. The rocking member 301 starts to reset and start to swing left and right, driving the entire filter element housing 2 to swing left and right. At this time, the residual phosphorus trifluoride is sucked out at the position of the feed end 101. Therefore, under the action of the external suction force and the left and right swinging force of the filter element housing 2, the particles blocked on the multi-baffle filter element structure 4 will fall to the bottom of the filter element housing 2. Both the front filter end and the rear filter end can be evenly swung, so that the recoil effect at each position can be formed, thereby improving the practical effect of the present invention.

[0046] When the rocking member 301 swings, it needs to be reset after the phosphorus trifluoride liquid introduced loses pressure. At the same time, it also needs a continuous rocking force when it drives the filter housing 2 to shake. However, if the filter housing 2 is supported and buffered only by the spring, it is not enough to support the solid weight of the filter. Therefore, the rocking member 301 of this embodiment includes a stabilizing head 3011 connected to the boss 103. The stabilizing head 3011 is slidably sleeved with a limiting cavity tube 3012 in the direction of one side of the filter housing 2. The outer side of the stabilizing head 3011 is also sleeved with A spring 3013, one end of which is connected to the boss 103, and the other end of which is fixed to the limiting cavity 3012. The rocking member 301 is connected to the limiting cavity 3012 through the cooperation between the limiting cavity 3012 and the stabilizing head 3011, and then the spring 3013 is loaded to the outside of the stabilizing head 3011, with the sliding cooperation between the limiting cavity 3012 and the stabilizing head 3011 as the supporting end, and the cooperation between the spring 3013 and the stabilizing head 3011 as the displacement end, thereby achieving both stable support and the effect of providing reciprocating support force.

[0047] In order to make the connection between the filter element housing 2 and the rocking member 301 more stable, mounting frames 202 are respectively provided at both ends of the filter element housing 2, and the mounting frames 202 are fixedly connected to the limiting cavity tube 3012, so that when the rocking member 301 moves, the filter element housing 2 is driven to move through the mounting frames 202.

[0048] In order to ensure that the filter element housing 2 can always follow a fixed path when it slides, and not easily affect the cooperation between the limiting cavity tube 3012 and the stabilizing head 3011, and the spring 3013 and the stabilizing head 3011, the inner wall of the outer shell 1 of this embodiment is provided with a plurality of dovetail grooves, and the guide seat 302 is a dovetail type, and the guide seat 302 is engaged with the dovetail grooves. By providing a dovetail groove on the inner wall of the outer shell 1 and then setting the guide seat 302 to a dovetail type, the filter element housing 2 can always remain in a straight line when moving, making it more stable when moving.

[0049] After the multi-baffle filter element structure 4 is backflushed, the particles will fall to the bottom of the filter element housing 2. At this time, it is difficult to extract the particles shaken off the bottom by conventional air blowing, and the particles will be blocked by the closing plate or the outer ring baffle. Therefore, the present invention is provided with an outer bottom extraction structure 5 on the basis of the multi-baffle filter element structure 4, so that the particles at the bottom of the filter element housing 2 can be sucked into the fixed seat 501 through the elastic tube 502, and transferred to the outside through the quick connector. Moreover, due to the elastic setting of the elastic tube 502, it can be deformed according to the displacement of the filter element housing 2, so as to realize dynamic extraction and extract the particles at the bottom of the inclined filter element housing 2. Compared with the traditional backflushing, the inclined bottom suction method has better effect.

[0050] In order to better adapt and limit the diamond structure of the filter element housing 2, the fixed seat 501 of this embodiment includes a mounting seat 5011 fixed to the bottom of the inner part of the outer shell 1, and an angular limiting seat 5012 is arranged above the mounting seat 5011. The limiting seat 5012 is located at the bottom of the filter element housing 2. The two ends of the limiting seat 5012 can limit the sliding filter element housing 2, so as to rigidly limit the filter element housing 2.

[0051] The elastic tube 502 will be slightly deformed during the movement of the filter element housing 2, but it itself is fixed. Therefore, the elastic tube 502 includes a butt joint 5021 connected to the quick connector, and a bellows 5022 is connected to the top of the butt joint 5021. The top of the bellows 5022 is connected to a connecting tube 5023 plugged into the horizontal connecting frame 201. The position of the butt joint 5021 remains unchanged, while the bellows 5022 will continue to twist as the position of the filter element housing 2 changes, so that even for a filter element housing 2 with mobility, the particles settled at the bottom can be sucked away.

[0052] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A phosphorus trifluoride filter, comprising an outer shell (1), wherein a feed end (101) and a discharge end (102) are respectively arranged at the left and right ends of the outer shell (1), wherein the feed end (101) is connected to a liquid infusion tube, and the discharge end (102) is connected to a filling pipe, and a filter element housing (2) is further arranged inside the outer shell (1), characterized in that: The phosphorus trifluoride filter also includes: A reciprocating recoil assembly (3), wherein a plurality of groups of bosses (103) are arranged on the inner side of the outer shell (1), the reciprocating recoil assembly (3) comprises a swinging member (301) fixedly connected to the boss (103), one end of the swinging member (301) away from the boss (103) being connected to the filter element housing (2), and a plurality of groups of guide seats (302) slidingly engaged with the inner wall of the outer shell (1) being fixedly connected to the outer side of the filter element housing (2), when fluid is passed into the filter element housing (2), the filter element housing (2) is squeezed by the swinging member (301) on the side of the fluid flow direction, and when the fluid flow is cut off, the filter element housing (2) swings left and right under the action of the swinging member (301); The multi-baffle filter element structure (4) is arranged in the filter element housing (2), the filter element housing (2) is a diamond-shaped structure, and the multi-baffle filter element structure (4) comprises a first feed filter cartridge (401) movably connected to the feed end (101), the first feed filter cartridge (401) is connected to a first closing plate (402), a first filter ring plate (403) is fixedly connected to the outer side of the first closing plate (402), a second feed filter cartridge (404) is connected to the rear side of the first closing plate (402), and an outer filter ring plate (403) is connected to the outer side of the middle portion of the second feed filter cartridge (404). annular baffle (405), the end of the second feed filter cartridge (404) is connected to a second closing plate (406), the outer side of the second closing plate (406) is fixedly connected to a second filter ring plate (407), the filter element housing (2) is in communication with the discharge end (102), a retention frame (408) is also provided at the inner side of the short symmetry axis of the rhombus structure, some particles of the fluid adhere to the retention frame (408) after flowing through the middle part of the rhombus structure, and the other end of the filter element housing (2) is movably connected to the discharge end (102) via a discharge slide pipe (409); The retention frame (408) comprises a first retention member (4081) arranged on the left side of the outer ring baffle (405) and a second retention member (4082) arranged on the right side of the outer ring baffle (405), the first retention member (4081) and the second retention member (4082) having the same structure, and the proportion of the first retention member (4081) is 1.5 times that of the second retention member (4082); The first retention member (4081) comprises a plurality of sets of inner oblique shafts (40801) and outer oblique shafts (40802) fixedly connected to the inner bottom of the filter element housing (2), wherein the inner oblique shafts (40801) and the outer oblique shafts (40802) form an X-shaped structure; An outer sole extraction structure (5), wherein a plurality of transverse connecting frames (201) are spaced apart at the lower end of the diamond-shaped structure, the outer sole extraction structure (5) comprises a fixing seat (501) fixedly connected to the inner bottom of the outer shell (1), a plurality of elastic tubes (502) are arranged at the upper end of the fixing seat (501), and a plurality of quick connectors are arranged at the lower end of the fixing seat (501), and the quick connectors are connected to the suction structure.

2. A phosphorus trifluoride filter according to claim 1, characterized in that: The rocking member (301) comprises a stabilizing head (3011) connected to the boss (103); the stabilizing head (3011) is slidably sleeved with a limiting cavity tube (3012) in a direction toward one side of the filter element housing (2); a spring (3013) is sleeved on the outer side of the stabilizing head (3011); one end of the spring (3013) is connected to the boss (103), and the other end of the boss (103) is fixedly connected to the limiting cavity tube (3012).

3. A phosphorus trifluoride filter according to claim 1, characterized in that: Mounting frames (202) are respectively provided at both ends of the filter element housing (2), and the mounting frames (202) are fixedly connected to the limiting cavity tube (3012).

4. A phosphorus trifluoride filter according to claim 3, characterized in that: The inner wall of the outer shell (1) is provided with a plurality of dovetail grooves, the guide seat (302) is dovetail-shaped, and the guide seat (302) is engaged with the dovetail grooves.

5. A phosphorus trifluoride filter according to claim 1, characterized in that: The length of the second feed filter cartridge (404) is twice that of the first feed filter cartridge (401), and both ends of the outer ring baffle (405) extend to the vertices of the short symmetry axis of the filter element housing (2).

6. A phosphorus trifluoride filter according to claim 1, characterized in that: The fixing seat (501) comprises a mounting seat (5011) fixed to the inner bottom of the outer shell (1), an angular limiting seat (5012) is arranged above the mounting seat (5011), and the limiting seat (5012) is located at the bottom of the filter element shell (2).

7. A phosphorus trifluoride filter according to claim 6, characterized in that: The elastic tube (502) comprises a butt joint (5021) connected to the quick connector, the top of the butt joint (5021) is connected to a bellows (5022), and the top of the bellows (5022) is connected to a connecting tube (5023) plugged into the transverse connecting frame (201).

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