Filter eliminator

Abstract

The present invention relates to a filter degasser, comprising a main cavity, a liquid inlet channel and a liquid outlet channel are respectively provided on both sides of the main cavity, an exhaust channel is provided on the upper part of the main cavity, a solid waste discharge channel is provided on the lower part of the main cavity, a filter exhaust unit is arranged in the main cavity, the filter exhaust unit comprises a filter inner cylinder fixedly arranged along the up and down directions, a buoyancy unit is arranged in the filter inner cylinder, the upper end of the buoyancy unit is higher than the liquid inlet channel and the liquid outlet channel, an exhaust assembly connected to the exhaust channel is arranged on the upper end surface of the buoyancy unit, the buoyancy unit is movable up and down along the cylinder length direction of the filter inner cylinder, the exhaust assembly drives the buoyancy unit to move, a counterweight unit is arranged in the buoyancy unit, the counterweight unit and the buoyancy unit are detachably connected, a counterweight ball is arranged on the counterweight unit, and a sealed cavity for increasing and decreasing the counterweight ball is arranged in the counterweight unit. The present invention has a simple and ingenious structure, high structural stability during operation, and good processing effect of filter degassing.

Description

Technical Field

[0001] The invention belongs to the technical field of filtering and degassing of pipeline fluid, and in particular relates to a filtering and degassing device. Background Art

[0002] The degassing filter is an important equipment for pipeline fluid processing. Its main function is to filter solid impurities (solid waste) in pipeline fluid and separate gas impurities in pipeline fluid, so as to obtain pure liquid after filtering and degassing. Especially in the field of gasoline, its application in the field of gasoline detection and processing of gas station is very important.

[0003] The existing filter degasser mainly includes a main cavity, a liquid inlet channel and a liquid outlet channel are respectively provided on both sides of the main cavity, an exhaust channel is provided at the upper part of the main cavity, a solid waste discharge channel is provided at the lower part of the main cavity, and a filter exhaust unit is arranged in the main cavity. The separated gas impurities are discharged from the exhaust channel through the filter exhaust unit, and the filtered solid waste is discharged through the solid waste discharge channel. Therefore, the filter exhaust unit, the exhaust channel components, and the solid waste discharge channel components are the core technologies of the filter degasser. Chinese patent "A New Type of Degassing Filter" (authorization announcement number CN 204767696 U; authorization announcement date 2015.11.18) discloses a degassing filter. In order to address the insufficient degassing capacity of existing degassing filters, an inverted filter cartridge is used in conjunction with a float piston sealing device to form a gas space. Although a connecting rod mechanism is used to switch exhaust by a float liquid level control valve, the components at the exhaust channel need to operate independently, that is, the components at the exhaust channel are independent of the filter exhaust unit. Regardless of the structural complexity and volume structure, the structural matching is not high, that is, for pipelines with different hydraulic requirements, since they are controlled by independent float liquid level control valves, they cannot match pipelines with different liquid pressures. Chinese patent "A degassing filter" (authorization announcement number CN 207986870 U; authorization announcement date 2018.10.19) discloses another degassing filter. Although it uses a breathing valve to replace the lever exhaust mechanism, its exhaust channel components are still independent of the filter exhaust unit; in addition, its filter exhaust unit adopts a traditional filter mesh structure. In actual use, due to the different sources of flow pressure of the pipeline fluid, the stability of this traditional filter mesh structure is not high for the source of high pressure, resulting in the need to improve the processing effect of filtering degassing, especially during the exhaust process, which is a pressure relief process, that is, the pressure will change during this process, and the stability of the degassing cannot be guaranteed. Summary of the invention

[0004] The purpose of the present invention is to provide a filter degasser with a simple and ingenious structure, a small size, high structural stability during operation, good filtering and degassing treatment effect, and the ability to match pipelines with different fluid pressures to meet the use of pipelines with different hydraulic requirements.

[0005] In order to achieve the above objectives, the technical solution adopted by the present invention is: a filter degasser, comprising a main cavity, a liquid inlet channel and a liquid outlet channel are respectively provided on both sides of the main cavity, an exhaust channel is provided on the upper part of the main cavity, and a solid waste discharge channel is provided at the lower part of the main cavity, a filter exhaust unit is arranged in the main cavity, the filter exhaust unit comprises a filter inner cylinder fixedly arranged along the up and down directions, a buoyancy unit is arranged in the filter inner cylinder, the upper end of the buoyancy unit is higher than the liquid inlet channel and the liquid outlet channel, an exhaust assembly connected to the exhaust channel is arranged on the upper end surface of the buoyancy unit, the buoyancy unit is movable up and down along the length direction of the filter inner cylinder, the exhaust assembly drives the buoyancy unit to move, a counterweight unit is arranged in the buoyancy unit, the counterweight unit and the buoyancy unit are detachably connected, a counterweight ball is arranged on the counterweight unit, and a sealed cavity for increasing or decreasing the counterweight ball is arranged in the counterweight unit.

[0006] Furthermore, the solid waste discharge channel is a through groove arranged below the filter inner cylinder, and a detachable piston is threadedly connected to the bottom of the through groove.

[0007] Furthermore, the exhaust channel and the solid waste discharge channel are arranged coaxially, the axis of the filter inner cylinder is located on the axis line of the exhaust channel, the cylinder wall of the filter inner cylinder is provided with filter holes, the upper end of the filter inner cylinder is fixedly connected to the lower cavity wall of the exhaust channel, and fixed reinforcement ribs are arranged between the lower end of the filter inner cylinder and the upper cavity wall of the solid waste discharge channel.

[0008] Furthermore, the upper part of the buoyancy unit is cylindrical and the lower part is an inverted truncated cone. The radius of the cylinder is equal to the radius of the large bottom surface of the truncated cone, and the cylinder and the truncated cone are coaxially arranged. The axis of the buoyancy unit coincides with the axis of the filter inner tube. A connecting cavity is provided in the buoyancy unit. The cavity mouth of the connecting cavity is located at the lower end of the buoyancy unit. The sealing cavity of the counterweight unit is inserted into the connecting cavity from the cavity mouth of the connecting cavity. A sealing seat is provided at the bottom of the sealing cavity. The sealing seat at the bottom of the sealing cavity is threadedly connected to the cavity mouth of the connecting cavity.

[0009] Furthermore, a limiting circular groove is fixedly provided at the lower end of the buoyancy unit, the axis of the limiting circular groove coincides with the axis of the buoyancy unit, the opening of the connecting cavity is located on the bottom surface of the limiting circular groove, and the outer diameter of the limiting circular groove is equal to the inner diameter of the filter inner cylinder.

[0010] Furthermore, a sealing ring is arranged between the sealing seat at the bottom of the sealing cavity and the cavity opening of the connecting cavity.

[0011] Further preferably, the fixed reinforcement ribs are two rods symmetrically arranged on both sides of the lower end of the filter inner cylinder.

[0012] Furthermore, the exhaust passage is opened at the middle position of the upper end cover on the upper part of the main cavity, and the outer edge of the upper end cover is threadedly connected to the upper end cavity wall of the main cavity.

[0013] Further preferably, the exhaust assembly includes a push rod fixed on the upper end surface of the buoyancy unit, and a connecting pushing portion is arranged on the upper part of the push rod. The connecting pushing portion includes two side connecting rods symmetrically arranged on both sides of the bottom surface of the upper end cover and a push rod located in the upward extension direction of the push rod. The piston of the exhaust assembly is arranged on the push rod, and a hinge shaft is arranged at the connection position between the push rod and the push rod. The upper ends of the two side connecting rods are hinged to the hinge seats on the bottom surface of the upper end cover, and the lower ends of the two side connecting rods are hinged to the hinge shaft. The rod body of the push rod has a ventilation cavity along the length direction of the rod; when the piston on the push rod is pushed upward, the chamber of the main cavity is connected to the exhaust channel through the ventilation cavity, and when the piston on the push rod returns downward, the piston is plugged in the exhaust channel.

[0014] Furthermore, a sealing gasket is arranged between the upper end of the main cavity and the upper end cover.

[0015] The technical effect of the present invention is as follows: the present invention adopts a filter inner cylinder fixedly arranged in the main cavity, a buoyancy unit is arranged in the filter inner cylinder, and a counterweight unit is arranged in the buoyancy unit, and the exhaust channel and the solid waste discharge channel are both integrally arranged structures on the main cavity. During operation, the fluid enters the main cavity from the liquid inlet channel. Due to the action of the firmly arranged filter inner cylinder, the solid impurities in the fluid entering the main cavity are filtered and deposited in the solid waste discharge channel, and the gas impurities pass through the filter inner cylinder and float to the lower chamber of the exhaust channel. The degassing process of the present invention is as follows: under normal working conditions (degassing is not started), the pressure of the entire main cavity chamber remains basically unchanged during the working process. As more and more fluid passes through the main cavity chamber, the amount of gas floating in the main cavity chamber increases, resulting in a decrease in the buoyancy of the fluid (liquid) on the buoyancy unit in the main cavity chamber and the counterweight unit therein, (the buoyancy of the buoyancy unit and the counterweight unit therein) Under the action of gravity, the exhaust assembly (including the buoyancy unit and the counterweight unit therein) starts to release air outwards to complete degassing; as the gas is released, the liquid level in the main cavity rises, and the buoyancy of the (liquid) in the main cavity increases, and the buoyancy unit and the counterweight unit therein drive the exhaust assembly to push the exhaust assembly to a sealed position again; that is, the moment the exhaust channel is opened: the gravity of the buoyancy unit and the counterweight unit therein is equal to the sum of the buoyancy in the main cavity and the pressure on the piston surface of the exhaust assembly; the moment the exhaust assembly is pushed into place: the gravity of the buoyancy unit and the counterweight unit therein is equal to the buoyancy of the (liquid) in the main cavity. In this way, the degassing and closing actions are completed and the frequent execution of the degassing work is avoided. The present invention has a simple and ingenious structure, a small size, high structural stability during operation, and a good filtering and degassing treatment effect. First, it is more effective in removing air than the existing design. Second, it ensures that the airflow is effectively discharged upward. Third, the number of weighted balls can be adjusted through the detachable weighted unit part at the bottom of the buoyancy unit 22, which can simply and effectively match the pipeline degassing of different fluid pressures on site, meet the use of pipelines with different hydraulic requirements, and adapt to different liquids and the pressure requirements of different pressure valves on the filter degasser. And the upper end of the buoyancy unit is higher than the liquid inlet channel and the liquid outlet channel, ensuring the effectiveness of the device of the present invention when working. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is an external structural diagram of the present invention (without the detachable piston 15 on the solid waste discharge channel 14);

[0017] Figure 2 It is the internal structure diagram of the present invention;

[0018] Figure 3 This is a front view structural diagram of the filter inner cylinder of the present invention;

[0019] Figure 4 It is a top view of the filter inner cylinder of the present invention;

[0020] Figure 5is a structural diagram of the buoyancy unit of the present invention;

[0021] Figure 6 It is a structural diagram of the counterweight unit of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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 making creative work are within the scope of protection of the present invention.

[0023] Referring to the accompanying drawings, a filter degasser includes a main cavity 10, a liquid inlet channel 11 and a liquid outlet channel 12 are respectively opened on both sides of the main cavity 10, an exhaust channel 13 is opened at the upper part of the main cavity 10, and a solid waste discharge channel 14 is opened at the lower part of the main cavity 10. A filter exhaust unit 20 is arranged in the main cavity 10, and the filter exhaust unit 20 includes a filter inner cylinder 21 fixedly arranged in the up and down directions, and a buoyancy unit 22 is arranged in the filter inner cylinder 21, and the upper end of the buoyancy unit 22 is higher than the liquid inlet channel 11 and the outlet channel 12. Liquid channel 12, an exhaust assembly 26 connected to the exhaust channel 13 is arranged on the upper end surface of the buoyancy unit 22, the buoyancy unit 22 is movable up and down along the length direction of the filter inner tube 21, the exhaust assembly 26 drives the buoyancy unit 22 to move, a counterweight unit 23 is arranged in the buoyancy unit 22, the counterweight unit 23 and the buoyancy unit 22 are detachably connected, a counterweight ball 24 is arranged on the counterweight unit 23, and a sealed cavity 23a for increasing or decreasing the counterweight ball 24 is arranged in the counterweight unit 23.

[0024] The present invention adopts a filter inner cylinder 21 fixedly arranged in the main cavity 10, a buoyancy unit 22 is arranged in the filter inner cylinder 21, and a counterweight unit 23 is arranged in the buoyancy unit 22, and the exhaust channel 13 and the solid waste discharge channel 14 are both integrally arranged on the main cavity 10. During operation, the fluid enters the main cavity 10 from the liquid inlet channel 11. Due to the effect of the firmly arranged filter inner cylinder 21, the solid impurities of the fluid entering the main cavity 10 are filtered out and deposited in the solid waste discharge channel 14, and the gas impurities pass through the filter inner cylinder 21 and float to the lower chamber of the exhaust channel 13. The degassing process of the present invention is as follows: under normal working conditions (degassing is not started), the pressure of the entire main cavity 10 chamber remains basically unchanged during the working process. As more and more fluid passes through the main cavity 10 chamber, the amount of floating gas in the main cavity 10 chamber increases, resulting in a decrease in the buoyancy of the fluid (liquid) on the buoyancy unit 22 and the counterweight unit 23 therein in the main cavity 10. Under the action of gravity, the exhaust assembly 26 is started (specifically, the connecting rod structure of its push part 26a pulls The piston on the push rod) releases air outward to complete the degassing; as the gas is released, the liquid level in the chamber of the main cavity 10 rises, the buoyancy of the (liquid) in the chamber of the main cavity 10 increases, and the buoyancy unit 22 and the counterweight unit 23 therein drive the exhaust assembly 26 (specifically, the connecting rod structure of its push part 26a) to push the exhaust assembly 26 (specifically, the connecting rod structure of its push part 26a pulls the piston on the push rod) to the sealed position again; that is, the moment the exhaust channel 13 is opened: the gravity of the buoyancy unit 22 and the counterweight unit 23 therein is equal to the sum of the buoyancy in the chamber of the main cavity 10 and the pressure on the piston surface of the exhaust assembly 26 (specifically, the piston on the push rod of the push part 26a); the moment the exhaust assembly 26 is pushed into place: the gravity of the buoyancy unit 22 and the counterweight unit 23 therein is equal to the buoyancy of the (liquid) in the chamber of the main cavity 10. In this way, the degassing and closing actions are completed and the frequent execution of the degassing work is avoided. The present invention has a simple and ingenious structure, a small size, high structural stability during operation, and good filtering and degassing treatment effect. First, it is more effective in degassing than existing designs. Second, it ensures that the airflow is effectively discharged upward. Third, the number of counterweight balls 24 can be adjusted through the detachable counterweight unit 23 at the bottom of the buoyancy unit 22, which can simply and effectively match the degassing of pipelines with different fluid pressures on site, meet the use of pipelines with different hydraulic requirements, and adapt to different liquids and the pressure requirements of different pressure valves on the filter degasser. In addition, the upper end of the buoyancy unit 22 is higher than the liquid inlet channel 11 and the liquid outlet channel 12, ensuring the effectiveness of the device of the present invention at all times during operation.

[0025] Furthermore, the solid waste discharge channel 14 is a through groove arranged below the filter inner tube 21, and a detachable piston 15 is threadedly connected to the bottom of the through groove.

[0026] By twisting the detachable piston 15, the solid impurities deposited in the solid waste discharge channel 14 can be discharged at any time, effectively and conveniently.

[0027] Furthermore, the exhaust channel 13 and the solid waste discharge channel 14 are arranged coaxially, the axis of the filter inner cylinder 21 is located on the axis line of the exhaust channel 13, the cylinder wall of the filter inner cylinder 21 is provided with filter holes, the upper end of the filter inner cylinder 21 is fixedly connected to the lower cavity wall of the exhaust channel 13, and a fixed reinforcement rib 21a is arranged between the lower end of the filter inner cylinder 21 and the upper cavity wall of the solid waste discharge channel 14.

[0028] This is the specific structure of the fixed filter inner cylinder 21. Referring to the attached drawings, the upper end of the filter inner cylinder 21 is fixed to the lower cavity wall of the exhaust channel 13, and the lower end of the filter inner cylinder 21 is fixed to the upper cavity wall of the solid waste discharge channel 14 through the fixed reinforcement ribs 21a, thereby ensuring the stability of the filter exhaust unit 20 during operation. Here, the design of the fixed reinforcement ribs 21a is especially effective, which not only further strengthens the support of the filter inner cylinder 21, but also ensures the stability of the working state of the lower end of the filter inner cylinder 21, and does not interfere with the deposition of solid impurities.

[0029] Furthermore, the upper part of the buoyancy unit 22 is cylindrical and the lower part is an inverted truncated cone. The radius of the cylinder is equal to the radius of the large bottom surface of the truncated cone, and the cylinder and the truncated cone are coaxially arranged; the axis of the buoyancy unit 22 coincides with the axis of the filter inner tube 21, and a connecting cavity 22a is provided in the buoyancy unit 22, and the cavity opening of the connecting cavity 22a is located at the lower end of the buoyancy unit 22, and the sealing cavity 23a of the counterweight unit 23 is inserted into the connecting cavity 22a from the cavity opening of the connecting cavity 22a, and a sealing seat is provided at the bottom of the sealing cavity 23a, and the sealing seat at the bottom of the sealing cavity 23a is threadedly connected to the cavity opening of the connecting cavity 22a.

[0030] The buoyancy unit 22 arranged in this way has good practical use effect, and there will be no jamming in the exhaust and closing stages of deflation. Moreover, the connection between the counterweight unit 23 and the buoyancy unit 22 is convenient and reliable.

[0031] Furthermore, a limiting circular groove 25 is fixedly provided at the lower end of the buoyancy unit 22, the axis of the limiting circular groove 25 coincides with the axis of the buoyancy unit 22, the opening of the connecting cavity 22a is located on the bottom surface of the limiting circular groove 25, and the outer diameter of the limiting circular groove 25 is equal to the inner diameter of the filter inner cylinder 21.

[0032] The set limiting circular groove 25 ensures the smoothness of the degassing activity driven by the exhaust assembly 26 without deviation, that is, it drives the buoyancy unit 22 to move up and down along the length direction of the filter inner cylinder 21 smoothly and stably, thereby further ensuring the high stability of the structure when the present invention is working, and having a better filtering and degassing treatment effect.

[0033] Furthermore, a sealing ring is provided between the sealing seat at the bottom of the sealing cavity 23a and the cavity opening of the connecting cavity 22a.

[0034] This seal ensures the stability of the counterweight.

[0035] Further preferably, the fixed reinforcement ribs 21 a are two rods symmetrically arranged on both sides of the lower end of the filter inner cylinder 21 .

[0036] Furthermore, the exhaust passage 13 is opened in the middle position of the upper end cover 16 on the upper part of the main cavity 10 , and the outer edge of the upper end cover 16 is threadedly connected to the upper cavity wall of the main cavity 10 .

[0037] In this way, through the design of the upper end cover 16, the main cavity 10 is completely opened, which facilitates the adjustment of the counterweight unit 23 in the main cavity 10. That is, the connecting nut between the upper end cover 16 and the main cavity 10 is removed, and the upper end cover 16 is lifted. Due to the limiting effect between the limiting circular groove 25 and the filter inner cylinder 21, the entire filter exhaust unit 20 is conveniently lifted out of the main cavity 10, and then the sealed cavity 23a in the counterweight unit 23 is removed, and the counterweight ball 24 can be added or removed, which is very convenient.

[0038] Further preferably, the exhaust assembly 26 includes a push rod fixed on the upper end surface of the buoyancy unit 22, and a connecting push portion 26a is arranged on the upper part of the push rod. The connecting push portion 26a includes two side connecting rods symmetrically arranged on both sides of the bottom surface of the upper end cover 16 and a push rod located in the upward extension direction of the push rod. The piston of the exhaust assembly 26 is arranged on the push rod, and a hinge shaft is arranged at the connection position between the push rod and the push rod. The upper ends of the two side connecting rods are hinged to the hinge seats on the bottom surface of the upper end cover 16, and the lower ends of the two side connecting rods are hinged to the hinge shaft. The rod body of the push rod has a ventilation cavity along the length direction of the rod; when the piston on the push rod is pushed upward, the chamber of the main cavity 10 is connected to the exhaust channel 13 through the ventilation cavity, and when the piston on the push rod returns downward, the piston is plugged in the exhaust channel 13.

[0039] This is the specific structure of the exhaust assembly 26, which achieves smooth upward pushing to eliminate air and downward retraction to close through the symmetrical connecting rod structure of the pushing portion 26a and the ventilation cavity structure of the rod body of the pushing rod, thereby further ensuring the high stability of the structure when the present invention is working and having a better filtering and eliminating air treatment effect.

[0040] Furthermore, a sealing gasket is provided between the upper end of the main cavity 10 and the upper end cover 16 .

[0041] This seal is to ensure the airtightness and effectiveness of the device of the present invention, and the accuracy of filtering and degassing of the fluid in the main cavity 10.

[0042] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A filter degasser, comprising a main chamber (10), a liquid inlet channel (11) and a liquid outlet channel (12) are respectively provided on both sides of the main chamber (10), an exhaust channel (13) is provided on the upper part of the main chamber (10), a solid waste discharge channel (14) is provided on the lower part of the main chamber (10), and a filter exhaust unit (20) is arranged in the main chamber (10), characterized in that: The filter exhaust unit (20) comprises a filter inner cylinder (21) fixedly arranged in the up-down direction, a buoyancy unit (22) being arranged in the filter inner cylinder (21), the upper end of the buoyancy unit (22) being higher than the liquid inlet channel (11) and the liquid outlet channel (12), an exhaust assembly (26) connected to the exhaust channel (13) being arranged on the upper end surface of the buoyancy unit (22), the buoyancy unit (22) being movable up-down along the length direction of the filter inner cylinder (21), and the exhaust assembly (26) driving the filter inner cylinder (21) to move the filter inner cylinder (21) upward and downward. The buoyancy unit (22) moves, a counterweight unit (23) is arranged in the buoyancy unit (22), the counterweight unit (23) and the buoyancy unit (22) are detachably connected, a counterweight ball (24) is arranged on the counterweight unit (23), and a sealed cavity (23a) for increasing or decreasing the counterweight ball (24) is arranged in the counterweight unit (23); the exhaust passage (13) is opened in the middle position of the upper end cover (16) on the upper part of the main cavity (10), and the outer edge of the upper end cover (16) is adjacent to the main cavity (10). The exhaust assembly (26) comprises a push rod fixed on the upper end surface of the buoyancy unit (22); a connecting push portion (26a) is arranged on the upper part of the push rod; the connecting push portion (26a) comprises two side connecting rods symmetrically arranged on both sides of the bottom surface of the upper end cover (16) and a push rod located in the upward extension direction of the push rod; the piston of the exhaust assembly (26) is arranged on the push rod; a hinge shaft is arranged at the connection position between the push rod and the push rod; the two side connecting rods are symmetrically arranged on the bottom surface of the upper end cover (16); and the connecting push portion (26a) is symmetrically arranged on both sides of the bottom surface of the upper end cover (16). The upper end of the connecting rod is hinged to the hinge seat on the bottom surface of the upper end cover (16), and the lower ends of the two side connecting rods are hinged to the hinge shaft. The rod body of the push rod is provided with a ventilation cavity along the length direction of the rod; when the piston on the push rod is pushed upward, the chamber of the main cavity (10) is connected to the exhaust channel (13) through the ventilation cavity; when the piston on the push rod returns downward, the piston is plugged in the exhaust channel (13), and a sealing gasket is provided between the upper end of the main cavity (10) and the upper end cover (16).

2. The filter degasser according to claim 1, characterized in that: The solid waste discharge channel (14) is a through groove arranged below the filter inner cylinder (21), and a detachable piston (15) is threadedly connected to the bottom of the through groove.

3. The filter degasser according to claim 1 or 2, characterized in that: The exhaust passage (13) and the solid waste discharge passage (14) are coaxially arranged, the axis of the filter inner cylinder (21) is located on the axis line of the exhaust passage (13), filter holes are provided on the cylinder wall of the filter inner cylinder (21), the upper end of the filter inner cylinder (21) is fixedly connected to the lower cavity wall of the exhaust passage (13), and a fixed reinforcing rib (21a) is provided between the lower end of the filter inner cylinder (21) and the upper cavity wall of the solid waste discharge passage (14).

4. The filter eliminator according to claim 3, characterized in that: The upper part of the buoyancy unit (22) is cylindrical and the lower part is an inverted truncated cone. The radius of the cylinder is equal to the radius of the large bottom surface of the truncated cone, and the cylinder and the truncated cone are coaxially arranged. The axis of the buoyancy unit (22) coincides with the axis of the filter inner cylinder (21). A connecting cavity (22a) is provided in the buoyancy unit (22). The cavity opening of the connecting cavity (22a) is located at the lower end of the buoyancy unit (22). The sealing cavity (23a) of the counterweight unit (23) is inserted into the connecting cavity (22a) from the cavity opening of the connecting cavity (22a). A sealing seat is provided at the bottom of the sealing cavity (23a). The sealing seat at the bottom of the sealing cavity (23a) is threadedly connected to the cavity opening of the connecting cavity (22a).

5. The filter eliminator according to claim 4, characterized in that: A limiting circular groove (25) is fixedly provided at the lower end of the buoyancy unit (22); the axis of the limiting circular groove (25) coincides with the axis of the buoyancy unit (22); the opening of the connecting cavity (22a) is located on the bottom surface of the limiting circular groove (25); and the outer diameter of the limiting circular groove (25) is equal to the inner diameter of the filter inner cylinder (21).

6. The filter degasser according to claim 4, characterized in that: A sealing ring is provided between the sealing seat at the bottom of the sealing cavity (23a) and the cavity opening of the connecting cavity (22a).

7. The filter eliminator according to claim 3, characterized in that: The fixed reinforcing ribs (21a) are two rods symmetrically arranged on both sides of the lower end of the filtering inner cylinder (21).

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