CN212596496U

CN212596496U - Space universal self-rotating ejector

Info

Publication number: CN212596496U
Application number: CN202021044324.2U
Authority: CN
Inventors: 椤捐搐; 顾贤
Original assignee: Jiangyin Huaneng Electric Heating Product Co ltd
Current assignee: Jiangyin Huaneng Electric Heating Product Co ltd
Priority date: 2020-06-09
Filing date: 2020-06-09
Publication date: 2021-02-26
Anticipated expiration: 2030-06-09

Abstract

The utility model discloses a space universal self-rotating ejector, which belongs to the technical field of ejectors, and comprises a filter chamber, a first rotating chamber and a second rotating chamber, wherein the first rotating chamber is arranged above the filter chamber, the second rotating chamber is arranged above the first rotating chamber, first jet assemblies are arranged at two sides of the first rotating chamber, the first jet assemblies can jet at two sides of the ejector, the second jet assemblies are arranged at two sides of the second rotating chamber, the second jet assemblies can jet in multiple angles, and a unidirectional flow assembly is arranged in the filter chamber, the utility model has the advantages of scientific and reasonable structure, safe and convenient use, filtering chamber can filter and clean sundries, and the unidirectional flow assembly can prevent the sundries from being flushed into a pipeline of an inlet port when the water in the filter chamber is washed, thus prolonging the service life of a nozzle or the ejector, the cost is saved.

Description

Space universal self-rotating ejector

Technical Field

The invention relates to the technical field of ejectors, in particular to a space universal self-rotating ejector.

Background

At present, injectors are used in a plurality of industrial fields, but most of the existing injectors can only fixedly inject along the direction of the injector, and cannot inject in other directions, and the speed of fluid entering the injector is relatively stable, so that the pressure of the fluid of the nozzle cannot be easily changed, and the pressure of the nozzle cannot be adjusted according to the distance of the injection position.

In addition, fluid sprayed in the sprayer is possibly not filtered, so that sundries in the fluid possibly block a spray head of the sprayer, the spray head needs to be replaced or the sprayer needs to be replaced, the service life of the sprayer is shortened, the use cost is increased, and therefore a new sprayer is needed to solve the problems.

Disclosure of Invention

The invention aims to provide a space universal self-rotating ejector to solve the problems in the prior art.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a universal autogyration sprayer in space, includes filter chamber, first whirling chamber and second whirling chamber, the top of filter chamber is equipped with first whirling chamber, the top of first whirling chamber is equipped with the second whirling chamber, first injection subassembly is installed to the both sides of first whirling chamber, and first injection subassembly can spray the position of sprayer both sides, second injection subassembly is installed to the both sides of second whirling chamber, and second injection subassembly can carry out the injection of multi-angle, filter chamber internally mounted has the unidirectional flow subassembly, and the unidirectional flow subassembly can prevent in the pipeline that fluid refluence can be imported.

The first injection assembly comprises a first spray head, an air bag, a buffer plate, an air conveying pipe and a one-way valve, the air bag is installed on the inner side of the first spray head and can control the size of an outlet of the first spray head to adjust the water pressure of the first spray head, the buffer plate is installed on one side of the air bag and can block impact of fluid on the air bag to prevent the air bag from being damaged, a first mounting hole and a second mounting hole are formed in a spray head wall of the air bag, which is in contact with the first spray head, the air conveying pipe is installed on the air bag and can convey gas to the air bag, the air conveying pipe penetrates through the first mounting hole, the one-way valve is installed on the air bag and adjusts the pressure of the first spray head by controlling the expansion degree of the air bag, the smaller the nozzle of the first spray head is, the faster the fluid flowing depth is, the greater the pressure is, and the larger the, the one-way valve allows airflow from the interior of the bladder to the exterior of the bladder.

The second spraying assembly comprises a second spraying head, a universal rotary joint, a sealing ring, a first support, a second support and a fixing ball, the universal rotary joint is mounted in the middle of the second spraying head and can enable the second spraying head to spray in multiple angles, the sealing ring is mounted inside the universal rotary joint and can guarantee the sealing performance of the universal rotary joint, the first support is mounted on the universal rotary joint and is connected with one end of a chain, a plurality of fixing balls are connected between the chains, the second support is connected with the other end of the chain, the positions of the chains and the fixing balls can be fixed by the first support and the second support, so that the direction of the universal rotary joint is not changed after the chains and the fixing balls are fixed, a circular cavity is formed inside the second support and used for placing the fixing ball, and the fixing ball can be clamped after the fixing ball is placed in the circular cavity, the second support can be divided into an upper part and a lower part, the upper part and the lower part of the second support are connected through hinges, one sides of the upper part and the lower part of the second support are provided with protrusions, threaded holes are formed in the protrusions, threaded bolts are installed in the threaded holes, and nuts are installed at two ends of the threaded bolts.

The unidirectional flow subassembly includes mounting bracket, connecting rod, round pin axle, valve clack and rubber circle, the round pin axle is installed to the upper end of mounting bracket, and the round pin axle can make the connecting rod not deviate from the mounting bracket when round the round pin axle is rotatory, the mounting bracket has the connecting rod through the round pin hub connection, and the connecting rod can make the valve clack can not break away from the support when being strikeed by the fluid, can the valve clack fall back original position after there is not the fluid process, the valve clack is installed to the below of connecting rod, the rubber circle is installed with the position that the valve clack contacted to the filter chamber.

The first nozzle is connected with the first rotating chamber through the turbine rod, one end of the turbine rod is meshed with the first gears on two sides, a plurality of first flow holes are formed in the first gears, a first rotating sealing element is installed at the position where the first nozzle is in contact with the first rotating chamber, and the first rotating sealing element can guarantee the sealing performance of the first nozzle during rotation.

The turbine pole other end is connected with the rotation axis, the blade is installed in the outside of rotation axis, and the blade can rotate under the impact of rivers and provide power for the rotation of first shower nozzle, the second flow hole has been seted up to the top of first whirling chamber, and fluid accessible second flow hole gets into the second whirling chamber.

The inside of second whirling chamber is equipped with the rotator, and the rotator can drive the second shower nozzle and rotate, the rotator is connected with the second injection subassembly, the rotatory sealing member of second is installed to the position that the second injection subassembly is connected with the second whirling chamber, and the leakproofness of second whirling chamber can be guaranteed to the rotatory sealing member of second, the inner wall top of second whirling chamber passes through the impeller dead lever with the upper surface of first whirling chamber and is connected.

The impeller is installed in the outside of impeller dead lever, and the impeller rotates and can provide power for the rotation of rotator, the impeller dead lever passes the rotator, the second gear is installed to the position that impeller dead lever and rotator contact.

The opening has been seted up to the position of contact between filter chamber and the first rotating chamber, open-ended internally mounted has solenoid valve and filter screen, the clearance mouth is installed to the both sides of filter chamber.

An inlet is arranged below the filtering chamber, a unidirectional flow assembly is arranged between the filtering chamber and the inlet, and the unidirectional flow assembly can prevent sundries from being flushed into a pipeline of the inlet when the filtering chamber is flushed with water.

Compared with the prior art, the invention has the beneficial effects that:

1. the general universal rotary injector usually realizes the universal rotation of the injector by the circular motion of the spray head, but the angle of the rotary injection cannot be changed and only the injection can be carried out along the direction of the injector, while the injector of the invention can enlarge the injection direction of the injector by adjusting the direction of the universal rotary joint and simultaneously realize the universal rotation of the injector by the circular motion of the spray head.

2. When the pressure of fluid at a nozzle is adjusted by a common ejector, the pressure can be increased by changing the speed of the fluid entering the ejector, so that the nozzle can eject the fluid to a far position, but the adjustment and control of the pressure of the nozzle are not sensitive enough, and much time is often wasted for adjustment.

3. The fluid sprayed by the common sprayer may not be filtered, so that impurities in the fluid may block the spray head of the sprayer, so that the spray head or the sprayer needs to be replaced.

Drawings

FIG. 1 is a schematic diagram of a spatial-gimbal self-rotating injector according to the present invention;

FIG. 2 is an enlarged view of part A of FIG. 1;

FIG. 3 is a schematic diagram of a second showerhead of a space-gimbal self-rotating injector according to the present invention;

FIG. 4 is an enlarged view of the portion B of FIG. 3;

FIG. 5 is a schematic view of a connection structure of a first support and a second support of the space-gimbal self-rotating injector according to the present invention;

FIG. 6 is a schematic diagram of a unidirectional flow assembly of a space-gimbal self-rotating injector in accordance with the present invention.

Reference numbers in the figures: 1. an inlet port; 2. a filter screen; 3. an electromagnetic valve; 4. a first rotating chamber; 5. a rotating shaft; 6. a blade; 7. a turbine rod; 8. a first gear; 9. a first flow aperture; 10. a buffer plate; 11. an air bag; 12. a gas delivery pipe; 13. a first nozzle; 14. a first rotary seal; 15. a second rotating chamber; 16. an impeller fixing rod; 17. an impeller; 18. a rotating body; 19. a second flow aperture; 20. a second rotary seal; 21. a universal swivel joint; 22. a second nozzle; 23. a seal ring; 24. a first bracket; 25. a second bracket; 26. fixing the ball; 27. a chain; 28. a protrusion; 29. A stud bolt; 30. a nut; 31. a hinge; 32. a first gear; 33. cleaning the opening; 34. a mounting frame; 35. a connecting rod; 36. a pin shaft; 37. a valve flap; 38. a rubber ring; 39. a filtering chamber; 40. a one-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example (b): as shown in fig. 1 to 6, a space universal self-rotating injector comprises a filtering chamber 39, a first rotating chamber 4 and a second rotating chamber 15, wherein the first rotating chamber 4 is arranged above the filtering chamber 39, the second rotating chamber 15 is arranged above the first rotating chamber 4, first spraying components are arranged on two sides of the first rotating chamber 4, the first spraying components can spray on two sides of the injector, the second spraying components are arranged on two sides of the second rotating chamber 15, the second spraying components can spray in multiple angles, a one-way flowing component is arranged inside the filtering chamber 39, and the one-way flowing component can prevent fluid from flowing backwards in a pipeline which can be input.

The first injection assembly comprises a first spray head 13, an air bag 11, a buffer plate 10, an air pipe 12 and a one-way valve 40, the air bag 11 is installed on the inner side of the first spray head 13, the air bag 11 can control the size of an outlet of the first spray head 13 to adjust the water pressure of the first spray head 13, the buffer plate 10 is installed on one side of the air bag 11, the buffer plate 10 can block the impact of fluid on the air bag 11 to prevent the air bag 11 from being damaged, a first mounting hole and a second mounting hole are formed in a spray head wall of the air bag 11, which is in contact with the first spray head 13, the air pipe 12 is installed on the air bag 11, the air pipe 12 can convey gas to the air bag 11, the air pipe 12 penetrates through the first mounting hole, the one-way valve 40 is installed on the air bag 11, the smaller the nozzle of the first spray head 13 is, the faster the fluid flowing depth is, the greater the pressure is, the check valve 40 allows the air flow to flow from the inside of the air bag 11 to the outside of the air bag 11, when the fluid reaches the first nozzle 13 through the first flow hole 9, the fluid is firstly provided with the buffer plate 10, the buffer plate 10 prevents the fluid from directly impacting the air bag 11, and when the pressure of the air bag 11 is controlled, the pressure of the first nozzle 13 can be adjusted by controlling the expansion degree of the air bag 11 through the air pipe 12 and the check valve 40.

The second spraying component comprises a second spraying head 22, a universal rotating joint 21, a sealing ring 23, a first support 24, a second support 25 and a fixing ball 26, the middle of the second spraying head 22 is provided with the universal rotating joint 21, the universal rotating joint 21 can enable the second spraying head 22 to spray in multiple angles, the sealing ring 23 is arranged inside the universal rotating joint 21, the sealing ring 23 can guarantee the sealing performance of the universal rotating joint 21, the universal rotating joint 21 is provided with the first support 24, the first support 24 is connected with one end of a chain 27, the middle of the chain 27 is connected with the fixing balls 26, the other end of the chain 27 is connected with the second support 25, the first support 24 and the second support 25 can fix the positions of the chain 27 and the fixing balls 26 so that the direction of the universal rotating joint 21 does not change after being fixed, a circular cavity is formed inside the second support 25, the circular cavity is used for placing a fixing ball 26, the fixing ball 26 can be clamped after the fixing ball 26 is placed in the circular cavity, the second support 25 can be divided into an upper portion and a lower portion, the upper portion and the lower portion of the second support 25 are connected through a hinge 31, a protrusion 28 is arranged on one side of the upper portion and the lower portion of the second support 25, a threaded hole is formed in the protrusion 28, a stud 29 is installed in the threaded hole, nuts 30 are installed at two ends of the stud 29, the upper portion and the lower portion of the second support 25 can be separated when the angle of the second spray head 22 needs to be adjusted, then the fixing ball 26 is selected to be clamped into the circular cavity of the second support 25 according to the angle to be adjusted, so that the angles of the two spray heads 22 are fixed, and then the upper portion and the lower portion of the second support 25 are combined through the stud 29 and the nuts, and the upper portion and the.

The unidirectional flow assembly comprises a mounting bracket 34, a connecting rod 35, a pin shaft 36, a valve clack 37 and a rubber ring 38, the upper end of the mounting bracket 34 is provided with a pin shaft 36, the pin shaft 36 enables the connecting rod 35 to rotate around the pin shaft 36 without being separated from the mounting bracket 34, the mounting bracket 34 is connected with a connecting rod 35 through a pin shaft 36, the connecting rod 35 can ensure that the valve clack 37 can not be separated from the bracket when being impacted by fluid, the flap 37 can fall back into its position after no fluid has passed, the flap 37 being mounted below the connecting rod 35, the position where the filter chamber 39 contacts with the valve flap 37 is provided with a rubber ring 38, the rubber ring 38 can ensure the tightness of the valve flap 37, when the injector is required to operate, fluid firstly enters from the inlet 1 to jack the valve flap 37 open, the valve flap 37 is fixedly connected with the connecting rod 35, and therefore the valve flap 37 rotates to bring the connecting rod 35 to rotate around the pin shaft 36.

The first nozzle 13 is connected with the first rotating chamber 4 through a turbine rod 7, one end of the turbine rod 7 is meshed with the first gears 8 on two sides, the first gear 8 is provided with a plurality of first flow holes 9, a first rotating sealing element 14 is installed at the position where the first nozzle 13 is in contact with the first rotating chamber 4, and the first rotating sealing element 14 can guarantee the sealing performance of the first nozzle 13 during rotation.

The other end of the turbine rod 7 is connected with a rotating shaft 5, a blade 6 is installed on the outer side of the rotating shaft 5, the blade 6 can rotate under the impact of water flow to provide power for the rotation of the first spray head 13, a second flow hole 19 is formed above the first rotating chamber 4, fluid can enter the second rotating chamber 15 through the second flow hole 19, the fluid is filtered through the filter screen 2 and then enters the first rotating chamber 4 through the electromagnetic valve 3, when the fluid reaches the first rotating chamber 4, the blade 6 is installed to provide impact force for the blade, then the blade 6 is driven by the fluid to rotate, the rotating shaft 5 is driven by the rotation of the blade 6 to rotate together, the turbine rod 7 is driven by the rotating shaft 5 to rotate, the turbine rod 7 is meshed with the first gears 8 on the two sides, the first gears 8 are driven to rotate, and a gear meshing part is arranged at the position where the first gears 8 are contacted with the first spray head 13, the first gear 8 drives the first nozzle 13 to rotate.

A rotating body 18 is arranged in the second rotating chamber 15, the rotating body 18 can drive a second nozzle 22 to rotate, the rotating body 18 is connected with a second injection assembly, a second rotating sealing element 20 is installed at the position where the second injection assembly is connected with the second rotating chamber 15, the second rotating sealing element 20 can ensure the sealing performance of the second rotating chamber 15, and the top end of the inner wall of the second rotating chamber 15 is connected with the upper surface of the first rotating chamber 4 through an impeller fixing rod 16.

An impeller 17 is mounted on the outer side of the impeller fixing rod 16, the impeller 17 rotates to provide power for the rotation of the rotating body 18, the impeller fixing rod 16 penetrates through the rotating body 18, a second gear 32 is mounted at a position where the impeller fixing rod 16 is in contact with the rotating body 18, then fluid enters the second rotating chamber 15 and drives the impeller 17 to rotate, the impeller 17 rotates to drive the impeller fixing rod 16 to rotate, the impeller fixing rod 16 drives the second gear 32 to rotate, the second gear 32 can drive the rotating body 18 to rotate, and the rotating body 18 rotates to enable the second nozzle to rotate along the second rotating chamber 15.

The opening has been seted up to the position of contact between filter chamber 39 and the first rotating chamber 4, open-ended internally mounted has solenoid valve 3 and filter screen 2, clearance mouth 33 is installed to the both sides of filter chamber 39, closes solenoid valve 3 when filter chamber 39 clears up, then opens the clearance mouth 33 of both sides, and the water is washed filter chamber 39, and the one-way flow subassembly can prevent to wash filter chamber 39 water in debris can be rushed into the pipeline of inlet port 1.

An inlet port 1 is arranged below the filtering chamber 39, a unidirectional flow assembly is arranged between the filtering chamber 39 and the inlet port 1, and the unidirectional flow assembly can prevent sundries from being flushed into a pipeline of the inlet port 1 when the filtering chamber 39 is flushed with water.

The working principle is as follows: when the injector is required to operate, fluid firstly enters from the inlet 1 to jack the valve flap 37 open, the valve flap 37 is fixedly connected with the connecting rod 35, and therefore the valve flap 37 rotates to bring the connecting rod 35 to rotate around the pin shaft 36.

Then the fluid filters through filter screen 2 and then gets into first rotatory chamber 4 through solenoid valve 3, the fluid reachs first rotatory chamber 4 and can install blade 6, give an impact force of blade, then blade 6 is driven by the fluid and rotates, blade 6 rotates and just drives rotation axis 5 and rotate together, rotation axis 5 drives turbine pole 7 and rotates, turbine pole 7 advances with the first gear 8 of both sides and meshes, just also driving first gear 8 and rotating, the position that first gear 8 and first shower nozzle 13 contacted is equipped with the meshing portion of gear, so first gear 8 also drives first shower nozzle 13 and advances rotatoryly.

When the fluid reaches the first nozzle 13 through the first flow hole 9, the fluid is firstly provided with the buffer plate 10, the buffer plate 10 prevents the fluid from directly impacting the air bag 11, and when the pressure of the air bag 11 is controlled to be adjusted, the pressure of the first nozzle 13 can be adjusted by controlling the expansion degree of the air bag 11 through the air pipe 12 and the one-way valve 40.

Then, after the fluid enters the second rotating chamber 15, the fluid drives the impeller 17 to rotate, the impeller 17 rotates to drive the impeller fixing rod 16 to rotate, the impeller fixing rod 16 drives the second gear 32 to rotate, the second gear 32 can drive the rotating body 18 to rotate, and the rotating body 18 rotates to enable the second nozzle to rotate along the second rotating chamber 15.

When the angle of the second nozzle 22 needs to be adjusted, the upper and lower parts of the second bracket 25 can be separated, and then the fixing ball 26 is clamped into the circular cavity of the second bracket 25 according to the angle to be adjusted, so as to fix the angle of the second nozzle 22.

When the electromagnetic valve 3 is closed when the filtering chamber 39 is cleaned, and then the cleaning ports 33 on both sides are opened to wash the filtering chamber 39 with water, the unidirectional flow assembly can prevent impurities from being washed into the pipe of the inlet port 1 when the filtering chamber 39 is washed with water. It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A space-gimbal self-rotating ejector, comprising: including filter chamber (39), first whirling chamber (4) and second whirling chamber (15), the top of filter chamber (39) is equipped with first whirling chamber (4), the top of first whirling chamber (4) is equipped with second whirling chamber (15), first injection subassembly is installed to the both sides of first whirling chamber (4), second injection subassembly is installed to the both sides of second whirling chamber (15), filter chamber (39) internally mounted has the uniflow subassembly.

2. A space-gimbal self-rotating injector as claimed in claim 1, wherein: first injection subassembly includes first shower nozzle (13), gasbag (11), buffer board (10), gas-supply pipe (12) and check valve (40), gasbag (11) are installed to the inboard of first shower nozzle (13), buffer board (10) are installed to one side of gasbag (11), first mounting hole and second mounting hole have been seted up on the shower nozzle wall that gasbag (11) and first shower nozzle (13) contacted, install gas-supply pipe (12) on gasbag (11), first mounting hole is passed in gas-supply pipe (12), install check valve (40) on gasbag (11), check valve (40) pass the second mounting hole, check valve (40) allow the air current from gasbag (11) inside to gasbag (11) external flow.

3. A space-gimbal self-rotating injector as claimed in claim 1, wherein: the second injection assembly comprises a second spray head (22), a universal rotating joint (21), a sealing ring (23), a first support (24), a second support (25) and fixing balls (26), the middle of the second spray head (22) is provided with the universal rotating joint (21), the sealing ring (23) is arranged inside the universal rotating joint (21), the first support (24) is arranged on the universal rotating joint (21), the first support (24) is connected with one end of a chain (27), the middle of the chain (27) is connected with a plurality of fixing balls (26), the other end of the chain (27) is connected with the second support (25), a circular cavity is formed inside the second support (25) and used for placing the fixing balls (26), the second support (25) can be divided into an upper part and a lower part, and the upper part and the lower part of the second support (25) are connected through a hinge (31), one side of two parts all is equipped with arch (28) about second support (25), the inside of arch (28) is equipped with the screw hole, install stud (29) in the screw hole, nut (30) are installed at the both ends of stud (29).

4. A space-gimbal self-rotating injector as claimed in claim 1, wherein: the unidirectional flow subassembly includes mounting bracket (34), connecting rod (35), round pin axle (36), valve clack (37) and rubber circle (38), round pin axle (36) are installed to the upper end of mounting bracket (34), mounting bracket (34) are connected with connecting rod (35) through round pin axle (36), valve clack (37) are installed to the below of connecting rod (35), rubber circle (38) are installed to the position that filter chamber (39) and valve clack (37) contacted.

5. A space-gimbal self-rotating injector as claimed in claim 2, wherein: first shower nozzle (13) are connected through turbine pole (7) with first rotatory room (4), the one end of turbine pole (7) meshes with first gear (8) of both sides, a plurality of first flow holes (9) have been seted up on first gear (8), first rotary seal (14) are installed with the position that first rotatory room (4) contacted in first shower nozzle (13).

6. A space-gimbal self-rotating injector as claimed in claim 5, wherein: the other end of the turbine rod (7) is connected with a rotating shaft (5), blades (6) are installed on the outer side of the rotating shaft (5), and a second flow hole (19) is formed in the upper portion of the first rotating chamber (4).

7. A space-gimbal self-rotating injector as claimed in claim 1, wherein: a rotating body (18) is arranged in the second rotating chamber (15), the rotating body (18) is connected with a second spraying assembly, a second rotating sealing element (20) is installed at the position where the second spraying assembly is connected with the second rotating chamber (15), and the top end of the inner wall of the second rotating chamber (15) is connected with the upper surface of the first rotating chamber (4) through an impeller fixing rod (16).

8. A space-gimbal self-rotating injector as claimed in claim 7, wherein: an impeller (17) is installed on the outer side of the impeller fixing rod (16), the impeller fixing rod (16) penetrates through the rotating body (18), and a second gear (32) is installed at the position where the impeller fixing rod (16) is in contact with the rotating body (18).

9. A space-gimbal self-rotating injector as claimed in claim 1, wherein: the opening has been seted up to the position of contact between filter chamber (39) and first rotatory room (4), open-ended internally mounted has solenoid valve (3) and filter screen (2), clearance mouth (33) are installed to the both sides of filter chamber (39).

10. A space-gimbal self-rotating injector as claimed in claim 9, wherein: an inlet opening (1) is arranged below the filtering chamber (39), and a unidirectional flow assembly is arranged between the filtering chamber (39) and the inlet opening (1).