A wet forming device for increasing the density of activated carbon filter cartridges

Abstract

The utility model discloses a kind of wet forming device for increasing the density of activated carbon filter element, comprising: installation main body is equipped with adsorption passage and negative pressure adsorption mechanism;Center tube, its internal passage is connected with adsorption passage, is equipped with multiple drainage holes distributed along its length direction;Soft sleeve, sleeve is set to the outside of center tube;Lower end cap and upper end cap, lower end cap and / or upper end cap can reciprocate along the internal passage of soft sleeve, lower end cap, upper end cap, soft sleeve and center tube are enclosed and form the closed forming space for containing filter element slurry containing water;Axial pressure mechanism, for driving lower end cap and upper end cap along the axial of soft sleeve mutually close;Radial pressure mechanism, for pressure to the radial inward of soft sleeve;It can make that filter element slurry after dehydration is uniformly, stably attached in skeleton cylinder, avoid the problem that traditional rolling forming mode is easy to cause filter element slurry to fall off, also can increase the density of activated carbon filter element.

Description

Technical Field

[0001] This utility model relates to a wet forming device for increasing the density of activated carbon filter elements. Background Technology

[0002] Wet activated carbon molding is a technology used to manufacture composite activated carbon filter elements. The main process steps of this technology are roughly as follows: activated carbon particles, fiber materials and other additives are mixed with binders, and after being fully slurried in water, they are stirred evenly to form a mixed slurry. Then, the mixed slurry is placed on the skeleton cylinder, and the mixed slurry is adhered to the outside of the skeleton cylinder by negative pressure adsorption to form a filter material layer. Then, the manufacturing process is completed through rolling molding, drying, and cloth wrapping.

[0003] The negative pressure adsorption and rolling forming processes are mainly for dehydration and increasing the density of carbon fiber rods. Rolling forming involves using a rolling shaft to press the adsorbed carbon fiber rods into a cylindrical shape. If the diameter of the carbon fiber rods before rolling is too large, the rolling shaft may push the material away or cause the material to separate, resulting in failure to form properly. This means that this process cannot give the carbon fiber filter element a very high density, and the filtration accuracy of the carbon fiber filter element produced by this process cannot meet the high accuracy requirements. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a wet forming device capable of squeezing water along the axial and radial directions of the activated carbon filter element and stably adhering the filter slurry to the skeleton cylinder, thereby increasing the density of the activated carbon filter element.

[0005] A wet forming device for increasing the density of activated carbon filter elements according to an embodiment of the present invention includes: a mounting body, wherein the mounting body is provided with an adsorption channel, the adsorption channel being connected to a negative pressure adsorption mechanism; a central tube, disposed on the mounting body, wherein its internal channel is connected to the adsorption channel, and the central tube is provided with a plurality of drainage holes distributed along its length; a soft sleeve, sleeved on the outside of the central tube; a lower end cover and an upper end cover, respectively disposed at both ends of the soft sleeve, the lower end cover and / or the upper end cover being capable of reciprocating along the internal channel of the soft sleeve, the lower end cover, the upper end cover, the soft sleeve and the central tube forming a closed forming space for accommodating water-containing filter element slurry; an axial pressure mechanism, connected to the lower end cover and / or the upper end cover, for driving the lower end cover and the upper end cover to move closer to each other along the axial direction of the soft sleeve; and a radial pressure mechanism, disposed on the outside of the soft sleeve, for applying pressure radially inward toward the soft sleeve.

[0006] The wet forming apparatus for increasing the density of activated carbon filter elements according to embodiments of the present invention has at least the following beneficial effects: In the process of manufacturing activated carbon filter elements, the skeleton cylinder is fitted onto the central tube, and the water-containing filter element slurry is poured into the molding space. The axial pressure mechanism and the radial pressure mechanism work together to squeeze out the water in the filter element slurry in the axial and radial directions. The squeezed water is absorbed by the negative pressure adsorption mechanism through the drainage hole, so that the dehydrated filter element slurry is evenly and stably attached to the skeleton cylinder. This avoids the problem of filter element slurry falling off that is easy to cause by traditional rolling molding method, and can also increase the density of activated carbon filter elements.

[0007] In some embodiments of this utility model, the radial pressure mechanism includes a rigid sleeve sleeved outside the soft sleeve. A closed cavity is formed between the inner peripheral wall of the rigid sleeve and the outer peripheral wall of the soft sleeve. A plurality of through holes communicating with the closed cavity are provided through the outer peripheral wall of the rigid sleeve. The through holes are connected to a hydraulic system to make the soft sleeve tightly clamp the filter slurry located in the molding space.

[0008] In some embodiments of this utility model, the outer periphery of the upper and lower ends of the rigid sleeve is respectively provided with a first mounting ring and a second mounting ring, the upper end of the soft sleeve is provided with a first annular flange that is tightly attached to the first mounting ring, and the lower end of the soft sleeve is provided with a second annular flange that is tightly attached to the second mounting ring.

[0009] In some embodiments of this utility model, a first fixing ring is connected to the first mounting ring to clamp and fix the first annular flange, and a second fixing ring is connected to the second mounting ring to clamp and fix the second annular flange. The upper end cover can abut against the first fixing ring and seal the upper port of the soft sleeve. The upper end cover and / or the hard sleeve are connected to a first lifting drive. The lower end cover is movably inserted through the second mounting ring, and the central tube is movably inserted through the lower end cover. The outer peripheral wall of the lower end cover fits against the inner peripheral wall of the soft sleeve. The lower end cover is connected to a second lifting drive that drives it to move up and down along the internal channel of the soft sleeve.

[0010] In some embodiments of this utility model, the first fixing ring is provided with a plurality of first through holes spaced apart along its circumference, the second fixing ring is provided with a plurality of second through holes spaced apart along its circumference, the first mounting ring is provided with a first threaded sleeve corresponding to each of the first through holes, the second mounting ring is provided with a second threaded sleeve corresponding to each of the second through holes, the fastening screw passes through the first through hole and is tightened to the first threaded sleeve, and the fastening screw passes through the second through hole and is tightened to the second threaded sleeve.

[0011] In some embodiments of this utility model, the upper end cover includes a plug that fits against the inner peripheral wall of the first fixing ring and a limiting plate connected to the upper end of the plug and capable of abutting downward against the upper surface of the first fixing ring. The outer peripheral wall of the plug is provided with a first sealing ring that elastically contacts the inner peripheral wall of the first fixing ring, and the middle part of the plug is provided with a positioning hole for the upper end of the central tube to be inserted.

[0012] In some embodiments of this utility model, the mounting body includes a main pipe coaxially and movably sleeved outside the central pipe, the main pipe passing through the second fixing ring, a flange seat connected to the lower end of the main pipe, the internal channel of the main pipe forming the adsorption channel, the lower end cover formed on the outer periphery of the upper end of the main pipe, the lower end face of the second fixing ring or the lower end cover being provided with a second sealing ring located on the outer periphery of the main pipe, and the second lifting drive being connected to the flange seat.

[0013] In some embodiments of this utility model, the upper end of the adsorption channel is provided with a constricted portion that matches the outer diameter of the central tube, and a limiting step is formed between the constricted portion and the adsorption channel. The lower end of the central tube is provided with an annular guide portion that slides in the adsorption channel and can abut against the limiting step. The adsorption channel is provided with a return spring whose two ends abut against the mounting body and the annular guide portion respectively, and the return spring drives the mounting body to move downward relative to the central tube.

[0014] In some embodiments of this utility model, the first lifting driver includes two lifting cylinders respectively connected to the upper end cover and the rigid sleeve. One of the lifting cylinders drives the upper end cover away from the upper end of the central tube, and the other lifting cylinder drives the rigid sleeve to move downward relative to the central tube to expose the upper middle part of the central tube.

[0015] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a cross-sectional schematic diagram of an embodiment of the wet molding device for increasing the density of activated carbon filter elements according to this utility model, when the upper end cover is far away from the lower end cover. Figure 2 for Figure 1 A cross-sectional schematic diagram of the upper end cap closing the upper port of the soft sleeve and injecting filter slurry in the embodiment; Figure 3 for Figure 1 An exploded view of the wet molding apparatus in this embodiment.

[0017] Figure label: Frame cylinder 10; filter slurry 20; mounting body 100; adsorption channel 101; main pipe 110; flange seat 120; center pipe 200; drain hole 201; annular guide part 210; soft sleeve 300; first annular flange 310; second annular flange 320; lower end cover 400; upper end cover 500; plug 510; limiting plate 520; first sealing ring 530; positioning insertion hole 540; forming space 600; hard sleeve 700; closed chamber 701; through hole 702; first mounting ring 710; second mounting ring 720; first fixing ring 810; second fixing ring 820; return spring 900. Detailed Implementation

[0018] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0019] In the description of this utility model, it should be understood that the directional descriptions, such as the terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] See Figures 1 to 3 This utility model discloses a wet-process molding device for increasing the density of activated carbon filter elements, comprising: a mounting body 100, wherein the mounting body 100 is provided with an adsorption channel 101, the adsorption channel 101 being connected to a negative pressure adsorption mechanism; a central tube 200, disposed on the mounting body 100, the internal channel of which is connected to the adsorption channel 101, the central tube 200 having a plurality of drainage holes 201 distributed along its length; a soft sleeve 300, sleeved on the outside of the central tube 200; a lower end cap 400 and an upper end cap 500, respectively disposed at both ends of the soft sleeve 300, the lower end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the lower end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the lower end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the upper end cap 500 and the lower end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the upper end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the lower end cap 400 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the upper end cap 5 ... upper end cap 500 and the upper end cap 500 being respectively disposed at both ends of the soft sleeve 300, the upper / Or the upper end cap 500 can reciprocate along the internal channel of the flexible sleeve 300, and the lower end cap 400, the upper end cap 500, the flexible sleeve 300 and the central tube 200 form a closed molding space 600 for accommodating the water-containing filter slurry 20; an axial pressure mechanism, connected to the lower end cap 400 and / or the upper end cap 500, is used to drive the lower end cap 400 and the upper end cap 500 to move closer to each other along the axial direction of the flexible sleeve 300; a radial pressure mechanism, located on the outside of the flexible sleeve 300, is used to apply pressure radially inward toward the flexible sleeve 300.

[0023] In the process of making activated carbon filter elements, the skeleton cylinder 10 is fitted onto the central tube 200, and the water-containing filter element slurry 20 is put into the molding space 600. The axial pressure mechanism and the radial pressure mechanism work together to squeeze out the water in the filter element slurry 20 in the axial and radial directions. The squeezed water is absorbed by the negative pressure adsorption mechanism through the drain hole 201, so that the dehydrated filter element slurry 20 is uniformly and stably attached to the skeleton cylinder 10. This avoids the problem of filter element slurry 20 falling off easily caused by the traditional rolling molding method, and can also increase the density of the activated carbon filter element.

[0024] See Figure 1 and Figure 2In some embodiments of this utility model, the radial pressure mechanism includes a rigid sleeve 700 sleeved outside the soft sleeve 300. A closed chamber 701 is formed between the inner peripheral wall of the rigid sleeve 700 and the outer peripheral wall of the soft sleeve 300. A plurality of through holes 702 communicating with the closed chamber 701 are provided through the outer peripheral wall of the rigid sleeve 700. The through holes 702 are connected to a hydraulic system to make the soft sleeve 300 tightly clamp the filter slurry 20 located in the molding space 600. Understandably, by using a hydraulic system to input constant-pressure oil into the closed chamber 701, a balanced and stable radial-inward pressure can be applied to various positions on the outer peripheral wall of the soft sleeve 300. This slightly reduces the radial dimension of the molding space 600, allowing the water in the filter slurry 20 to be extruded radially inward within the molding space 600. This helps ensure the stability of the radius dimension of the dehydrated carbon fiber filter element and the consistency of density at various positions in the circumferential direction, thereby guaranteeing the quality stability of the final carbon fiber filter element product. It is conceivable that in other embodiments, the radial pressure mechanism could be replaced by multiple fan-shaped annular pressure blocks and a driver that moves these pressure blocks closer together, but this method is less uniform in force application compared to the hydraulic system approach.

[0025] See Figure 2 and Figure 3 In some embodiments of this utility model, the upper and lower outer peripheries of the rigid sleeve 700 are respectively provided with a first mounting ring 710 and a second mounting ring 720. The upper end of the flexible sleeve 300 is provided with a first annular flange 310 tightly attached to the first mounting ring 710, and the lower end of the flexible sleeve 300 is provided with a second annular flange 320 tightly attached to the second mounting ring 720. This structure facilitates the formation of a stable closed chamber 701, helps to tension the flexible sleeve 300 along its length, avoids wrinkling, and ensures the airtightness of the closed chamber 701.

[0026] See Figure 2 and Figure 3In some embodiments of this utility model, a first fixing ring 810 is connected to the first mounting ring 710 to clamp and fix the first annular flange 310, and a second fixing ring 820 is connected to the second mounting ring 720 to clamp and fix the second annular flange 320. The upper end cover 500 can abut against the first fixing ring 810 and seal the upper port of the soft sleeve 300. The upper end cover 500 and / or the hard sleeve 700 are connected to a first lifting drive. The lower end cover 400 is movably inserted through the second mounting ring 720, and the central tube 200 is movably inserted through the lower end cover 400. The outer peripheral wall of the lower end cover 400 fits against the inner peripheral wall of the soft sleeve 300. The lower end cover 400 is connected to a second lifting drive that drives it to move up and down along the internal channel of the soft sleeve 300. It should be noted that the first lifting drive and the second lifting drive constitute the above-mentioned axial pressure mechanism. In the process of manufacturing activated carbon filter elements, see Figure 1 First, the first lifting driver is used to drive the upper end cover 500 away from the upper end of the rigid sleeve 700. Then, the skeleton cylinder 10 is fitted onto the central tube 200. At this time, the water-containing filter slurry 20 can be put into the molding space 600. Then, the second lifting driver drives the lower end cover 400 to move upward, which can compress the height dimension of the molding space 600, thereby squeezing out the water of the filter slurry 20 in the axial direction of the activated carbon filter element, which is beneficial to improving the density of the activated carbon filter element in the length direction.

[0027] See Figure 2 and Figure 3 In some embodiments of this utility model, to ensure that the first annular flange 310 is tightly attached to the first mounting ring 710 and the second annular flange 320 is tightly attached to the second mounting ring 720, thereby ensuring the sealing of the closed chamber 701, the first fixing ring 810 is provided with a plurality of first through holes spaced apart along its circumference, and the second fixing ring 820 is provided with a plurality of second through holes spaced apart along its circumference. The first mounting ring 710 is provided with a first threaded sleeve corresponding to each of the first through holes, and the second mounting ring 720 is provided with a second threaded sleeve corresponding to each of the second through holes. Fastening screws pass through the first through holes and are tightened onto the first threaded sleeves, and fastening screws pass through the second through holes and are tightened onto the second threaded sleeves. The soft sleeve 300 can be made of soft materials such as rubber or silicone. When the soft sleeve 300 reaches the end of its service life or its sealing performance is insufficient, the above structure allows for convenient replacement of the soft sleeve 300. Of course, in other embodiments, the first annular flange 310 and the second annular flange 320 can also be installed by adhesive fixation.

[0028] See Figure 1 and Figure 2In some embodiments of this utility model, the upper end cover 500 includes a plug 510 that fits against the inner peripheral wall of the first fixing ring 810 and a limiting plate 520 connected to the upper end of the plug 510 and capable of abutting downward against the upper surface of the first fixing ring 810. The outer peripheral wall of the plug 510 is provided with a first sealing ring 530 that elastically contacts the inner peripheral wall of the first fixing ring 810. The middle part of the plug 510 is provided with a positioning insertion hole 540 for the upper end of the central tube 200 to be inserted. It can be understood that the plug 510 abuts downward against the first annular flange 310, and the first sealing ring 530 can prevent the filter slurry 20 from overflowing from the gap between the plug 510 and the first fixing ring 810.

[0029] See Figure 2 In some embodiments of this utility model, the mounting body 100 includes a main pipe 110 coaxially and movably sleeved outside the central pipe 200. The main pipe 110 passes through the second fixing ring 820. The lower end of the main pipe 110 is connected to a flange seat 120. The internal channel of the main pipe 110 forms the adsorption channel 101. The lower end cover 400 is formed on the outer periphery of the upper end of the main pipe 110. The lower end face of the second fixing ring 820 or the lower end cover 400 is provided with a second sealing ring located on the outer periphery of the main pipe 110. The second lifting drive is connected to the flange seat 120. Understandably, the second lifting drive moves the entire assembly consisting of flange seat 120, main pipe 110 and lower end cover 400 upward together to compress the filter slurry 20 located in the molding space 600. During this process, the main pipe 110 moves upward relative to the central pipe 200, but the internal channel of the main pipe 110 and the internal channel of the central pipe 200 remain connected. Driven by the negative pressure adsorption mechanism (such as a vacuum pump), the squeezed water can flow sequentially through the drain hole 201, the central pipe 200 and the adsorption channel 101.

[0030] See Figure 2 In some embodiments of this utility model, the upper end of the adsorption channel 101 is provided with a constricted portion that matches the outer diameter of the central tube 200. A limiting step is formed between the constricted portion and the adsorption channel 101. The lower end of the central tube 200 is provided with an annular guide portion 210 that slides in the adsorption channel 101 and abuts against the limiting step. A return spring 900 is provided inside the adsorption channel 101, with its two ends abutting against the mounting body 100 and the annular guide portion 210 respectively. The return spring 900 drives the mounting body 100 to move downward relative to the central tube 200. The annular guide portion 210 acts as a telescopic limiter when abutting against the limiting step, and the return spring 900 helps the mounting body 100 return to its downward position relative to the central tube 200.

[0031] See Figure 1 In some embodiments of this utility model, the first lifting actuator includes two lifting cylinders respectively connected to the upper end cover 500 and the rigid sleeve 700. One lifting cylinder drives the upper end cover 500 away from the upper end of the central tube 200, and the other lifting cylinder drives the rigid sleeve 700 to move downward relative to the central tube 200 to expose the upper-middle part of the central tube 200. In this case, the height distance between the upper end cover 500 and the upper end of the central tube 200 is slightly greater than the length of the skeleton tube 10. In automated production, a robotic arm is used to insert the skeleton cylinder 10 into the outside of the central tube 200 until the lower end of the skeleton cylinder 10 abuts against the upper surface of the upper end cover 500. Then, the rigid sleeve 700 and the soft sleeve 300 move upward together to reset. The user pours the filter slurry 20 into the outside of the soft sleeve 300. Then, the upper end cover 500 closes the upper port of the soft sleeve 300. Next, the axial pressure mechanism, the radial pressure mechanism and the negative pressure adsorption mechanism work synchronously to squeeze out the water from the filter slurry 20 and press the filter slurry 20 onto the skeleton cylinder 10.

[0032] See Figures 1 to 3 The production method of the wet forming device for increasing the density of activated carbon filter elements according to any of the above technical solutions includes the following steps: To prepare filter cartridge slurry 20, raw materials are crushed, ground, and mixed in a solvent to form a water-containing filter cartridge slurry 20, which is used to form activated carbon filter cartridges. The skeleton cylinder 10 is fitted over the outside of the central tube 200, and the filter cartridge slurry 20 is placed into the forming space 600 of the wet forming device. An axial pressure mechanism drives the lower end cap 400 and the upper end cap 500 to move closer to each other, and a radial pressure mechanism applies pressure radially inward toward the soft sleeve 300, thereby squeezing the filter cartridge slurry 20 in the axial and radial directions of the forming space 600 to squeeze out the water in the filter cartridge slurry 20. The squeezed-out water is absorbed by a negative pressure adsorption mechanism through the drain hole 201 of the central tube 200, thus obtaining a filter cartridge semi-finished product that is stably attached to the outside of the skeleton cylinder 10. The filter cartridge semi-finished product is dried, and a non-woven fabric is wrapped around the outer surface of the dried filter cartridge semi-finished product. The above production method ensures that the dehydrated filter slurry 20 adheres evenly and stably to the skeleton cylinder 10, avoiding the problem of filter slurry 20 falling off easily caused by the traditional rolling molding method, and can also increase the density of the activated carbon filter element.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wet forming apparatus for increasing the density of activated carbon filter elements, characterized in that, include: The mounting body (100) is provided with an adsorption channel (101), which is connected to a negative pressure adsorption mechanism; A central tube (200) is provided on the installation body (100), and its internal channel is connected to the adsorption channel (101). The central tube (200) is provided with a plurality of drainage holes (201) distributed along its length. A soft sleeve (300) is fitted over the outside of the central tube (200); The lower end cap (400) and the upper end cap (500) are respectively disposed at both ends of the soft sleeve (300). The lower end cap (400) and / or the upper end cap (500) can reciprocate along the internal channel of the soft sleeve (300). The lower end cap (400), the upper end cap (500), the soft sleeve (300) and the central tube (200) form a closed molding space (600) for accommodating the water-containing filter slurry (20). An axial pressure mechanism, connected to the lower end cap (400) and / or the upper end cap (500), is used to drive the lower end cap (400) and the upper end cap (500) to move closer to each other along the axial direction of the soft sleeve (300). A radial pressure mechanism, located outside the soft sleeve (300), is used to apply radial inward pressure toward the soft sleeve (300).

2. The wet forming device for increasing the density of activated carbon filter elements according to claim 1, characterized in that: The radial pressure mechanism includes a rigid sleeve (700) sleeved on the outside of the soft sleeve (300). A closed chamber (701) is formed between the inner peripheral wall of the rigid sleeve (700) and the outer peripheral wall of the soft sleeve (300). A plurality of through holes (702) communicating with the closed chamber (701) are provided through the outer peripheral wall of the rigid sleeve (700). The through holes (702) are connected to a hydraulic system to make the soft sleeve (300) tightly clamp the filter slurry (20) located in the molding space (600).

3. The wet forming device for increasing the density of activated carbon filter elements according to claim 2, characterized in that: The upper and lower ends of the rigid sleeve (700) are respectively provided with a first mounting ring (710) and a second mounting ring (720). The upper end of the soft sleeve (300) is provided with a first annular flange (310) that is close to the first mounting ring (710), and the lower end of the soft sleeve (300) is provided with a second annular flange (320) that is close to the second mounting ring (720).

4. The wet forming device for increasing the density of activated carbon filter elements according to claim 3, characterized in that: The first mounting ring (710) is connected to a first fixing ring (810) that clamps and fixes the first annular flange (310). The second mounting ring (720) is connected to a second fixing ring (820) that clamps and fixes the second annular flange (320). The upper end cover (500) can abut against the first fixing ring (810) and seal the upper port of the soft sleeve (300). The upper end cover (500) and / or the hard sleeve (700) are connected to a first lifting driver. The lower end cover (400) is movably inserted through the second mounting ring (720). The central tube (200) is movably inserted through the lower end cover (400). The outer peripheral wall of the lower end cover (400) fits against the inner peripheral wall of the soft sleeve (300). The lower end cover (400) is connected to a second lifting driver that drives it to move up and down along the internal channel of the soft sleeve (300).

5. The wet forming device for increasing the density of activated carbon filter elements according to claim 4, characterized in that: The first fixing ring (810) is provided with a plurality of first through holes spaced apart along its circumference, and the second fixing ring (820) is provided with a plurality of second through holes spaced apart along its circumference. The first mounting ring (710) is provided with a first threaded sleeve corresponding to each of the first through holes, and the second mounting ring (720) is provided with a second threaded sleeve corresponding to each of the second through holes. The fastening screw passes through the first through hole and is tightened to the first threaded sleeve, and the fastening screw passes through the second through hole and is tightened to the second threaded sleeve.

6. The wet forming device for increasing the density of activated carbon filter elements according to claim 4, characterized in that: The upper end cap (500) includes a plug (510) that fits against the inner peripheral wall of the first fixing ring (810) and a limiting plate (520) connected to the upper end of the plug (510) and capable of abutting downward against the upper surface of the first fixing ring (810). The outer peripheral wall of the plug (510) is provided with a first sealing ring (530) that elastically contacts the inner peripheral wall of the first fixing ring (810). The middle part of the plug (510) is provided with a positioning insertion hole (540) for the upper end of the central tube (200) to be inserted.

7. The wet forming device for increasing the density of activated carbon filter elements according to claim 4, characterized in that: The mounting body (100) includes a main pipe (110) coaxially and movably sleeved outside the central pipe (200). The main pipe (110) passes through the second fixing ring (820). The lower end of the main pipe (110) is connected to a flange seat (120). The internal channel of the main pipe (110) constitutes the adsorption channel (101). The lower end cap (400) is formed on the outer periphery of the upper end of the main pipe (110). The lower end face of the second fixing ring (820) or the lower end cap (400) is provided with a second sealing ring located on the outer periphery of the main pipe (110). The second lifting drive is connected to the flange seat (120).

8. The wet forming apparatus for increasing the density of activated carbon filter elements according to claim 7, characterized in that: The upper end of the adsorption channel (101) is provided with a constricted portion that matches the outer diameter of the central tube (200). A limiting step is formed between the constricted portion and the adsorption channel (101). The lower end of the central tube (200) is provided with an annular guide portion (210) that slides in the adsorption channel (101) and can abut against the limiting step. The adsorption channel (101) is provided with a return spring (900) whose two ends abut against the mounting body (100) and the annular guide portion (210) respectively. The return spring (900) drives the mounting body (100) to move downward relative to the central tube (200).

9. A wet forming device for increasing the density of activated carbon filter elements according to claim 4, characterized in that: The first lifting actuator includes two lifting cylinders connected to the upper end cover (500) and the rigid sleeve (700) respectively. One of the lifting cylinders drives the upper end cover (500) away from the upper end of the central tube (200), and the other lifting cylinder drives the rigid sleeve (700) to move downward relative to the central tube (200) to expose the upper middle part of the central tube (200).

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