Safety detector for dangerous chemical leakage

Abstract

The invention discloses a safety detector for dangerous chemical leakage, and belongs to the technical field of detectors, the safety detector comprises a shell and a base for supporting the shell, the side end of the base is connected with a purification mechanism for purifying chemicals left in the shell, both ends of the shell are provided with wind tunnels, one end of the interior of the shell is provided with a motor seat, and the motor seat is provided with a motor. And a servo motor is mounted on the motor base. According to the invention, substances volatilized by dangerous chemicals can be treated, so that the substances volatilized by the dangerous chemicals are prevented from staying in the detector for a long time, a servo motor and a detection integrated module are prevented from being corroded, the service life of the detector is prolonged, and in addition, in the process that the servo motor drives fan blades to gradually stop rotating, the detection efficiency is improved. The detector can gradually form a completely sealed environment, so that air inside and outside the detector can be prevented from being exchanged, and a servo motor and a detection integrated module can be further prevented from being corroded.

Description

Technical Field

[0001] The present invention relates to the technical field of detectors, and specifically to a safety detector for dangerous chemical leakage. Background Art

[0002] A safety detector for dangerous chemical leakage is a device used to detect the leakage of dangerous chemicals. It mainly includes a structure for sucking in outside air and a sensor module for detecting the leakage of dangerous chemicals. The main sensors among them are electrochemical sensors, photoionization sensors, and infrared absorption sensors;

[0003] By using the safety detector for dangerous chemical leakage, it is possible to detect whether dangerous chemicals are leaking, so as to facilitate the staff to take effective measures in time to avoid the further expansion of hazards;

[0004] When the existing safety detectors for dangerous chemical leakage are in use, there are still the following technical problems, such as:

[0005] On the traditional safety detector for dangerous chemical leakage, there is only a structure for sucking in outside air and a detection module. In the structure for sucking in outside air, it mainly includes a motor and a fan. Generally, dangerous chemicals are corrosive. When the air containing volatile substances of dangerous chemicals from the outside is sucked into the interior of the detector, due to the presence of a structure for absorbing volatile substances of dangerous chemicals and the fact that the volatile substances of dangerous chemicals cannot be completely discharged from the detector, the motor and the detection module will be corroded, thereby greatly reducing the service life of the detector;

[0006] Therefore, a safety detector for dangerous chemical leakage is needed to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a safety detector for dangerous chemical leakage to solve the problem in the above-mentioned background art that the existing safety detector for dangerous chemical leakage does not have a structure for absorbing volatile substances of dangerous chemicals, which easily leads to the overlong residence time of volatile substances of dangerous chemicals in the detector and causes the motor or the detection module to be corroded.

[0008] To achieve the above purpose, the present invention provides the following technical solutions:

[0009] A safety detector for leakage of hazardous chemicals, comprising a housing and a base for supporting the housing. A purification mechanism is connected to the side end of the base for purifying the chemicals remaining in the housing. Wind tunnels are provided at both ends of the housing, and a motor base is installed at one end inside the housing. A servo motor is installed on the motor base, and the servo motor is connected to a fan blade through a centrifugal support mechanism. Four mounting shafts are equiangularly arranged at the other end inside the housing, and the four mounting shafts respectively pass through the four corners of the mounting frame movably. A detection integration module for detecting the leakage of hazardous chemicals is installed inside the mounting frame.

[0010] Preferably, an acoustic-optic alarm structure is provided on the detection integration module for timely alarming and reminding the staff after detecting the leakage of hazardous chemicals.

[0011] Preferably, the centrifugal support mechanism includes two rear disc bodies and a front disc body arranged face to face. One ends of three support rods are equiangularly axially connected to the opposite sides of the rear disc body and the front disc body. The other ends of the two opposite support rods are axially connected to the corresponding axles. Connecting discs are axially connected to the opposite sides of the rear disc body and the front disc body, and connecting shafts coaxial with them are provided on the opposite sides of the rear disc body and the front disc body. The connecting shafts movably pass through the corresponding connecting discs, and the two connecting shafts also respectively extend into the interiors of the first axle seat and the second axle seat movably. The first axle seat is coaxially fixedly connected to the shaft end of the servo motor. The fan blade is arranged outside the second axle seat, and the second axle seat is coaxially penetrated by a connecting frame bearing, and the connecting frame is fixedly connected to the inner side of the housing. Springs are provided between the interiors of the first axle seat and the second axle seat and the corresponding connecting shafts. Three connecting rods are equiangularly connected to the opposite sides of the two connecting discs, and the connecting rods on both sides respectively pass through the housing movably through the through holes provided at both ends of the housing. The ends of the connecting rods on the same side are connected by a blocking plate.

[0012] Preferably, a circular protrusion is provided on the part of the housing close to the detection integration module. The inner diameter of the circular protrusion coincides with the maximum distance of the fan blade from the axis of the second axle seat, ensuring that during the rotation of the fan blade, the outside air can be effectively sucked into the interior of the housing. The connecting rod connecting the front disc body through the connecting disc is zigzag, and the zigzag connecting rod movably passes through the circular protrusion, improving the installation stability of the zigzag connecting rod.

[0013] Preferably, the connecting rod connecting the rear disc body through the connecting disc is straight. Three protrusion blocks are equiangularly arranged on the part of the housing close to the servo motor, and the three straight connecting rods respectively pass through the three protrusion blocks movably. The three straight protrusion blocks also movably pass through the three corners of the reinforcing plate, and the reinforcing plate is coaxially and bearing-connected to the outside of the first axle seat.

[0014] Preferably, the slot holes in the first shaft seat and the second shaft seat for the connecting shaft to pass through and the connecting shaft are in a prismatic structure that matches each other. When the first shaft seat and the second shaft seat generate relative displacement with the corresponding connecting shaft respectively, it is ensured that the first shaft seat, the second shaft seat and the connecting shaft rotate synchronously.

[0015] Preferably, the blocking plate is composed of a metal disk body and a frustum-shaped rubber body. The connecting rods are connected to the corresponding metal disk body at equal angles. The inner diameter value of the wind tunnel is between the maximum diameter value and the minimum diameter value of the corresponding frustum-shaped rubber body, ensuring that the frustum-shaped rubber body can completely block the corresponding wind tunnel.

[0016] Preferably, the two support rods connected by the shaft core form a V-shaped structure, and the tip of the V-shaped structure faces the axis of the front disk body.

[0017] Preferably, the purification mechanism includes a mounting seat for mounting the liquid storage tank. The upper end of the mounting seat and the lower end of the liquid storage tank are connected by threads, and the mounting seat is fixedly connected to the side end of the base. The lower surface of the housing is provided with two through holes penetrating its inner and outer sides, and one end of the exhaust pipe and one end of the intake pipe are respectively connected through the two through holes. The two through holes are respectively close to the detection integration module and the servo motor, and two blocking plates are slidably connected to the inner bottom surface of the housing. The two blocking plates are used to block the two through holes respectively, and the two blocking plates are fixedly connected to the connecting rod in a zigzag shape and the connecting rod in a straight line respectively. The other end of the exhaust pipe is connected through to the upper end of the liquid storage tank, and the other end of the intake pipe is connected through to the lower end of the mounting seat.

[0018] Preferably, a liquid medicine for absorbing hazardous chemicals is arranged in the liquid storage tank, and the other ends of the exhaust pipe and the intake pipe are respectively above and below the liquid level of the liquid medicine. A one-way valve is arranged on the other end of the intake pipe to prevent the liquid medicine from flowing into the interior of the housing.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows: The safety detector for hazardous chemical leakage can process the substances volatilized from hazardous chemicals, thereby preventing the substances volatilized from hazardous chemicals from staying in the interior of the detector for a long time, thus avoiding the corrosion of the servo motor and the detection integration module, which helps to improve the service life of the detector. In addition, when the servo motor drives the fan blade to gradually stop rotating, a completely sealed environment will be gradually formed in the detector, which can further prevent the air inside and outside the detector from exchanging, helping to further avoid the corrosion of the servo motor and the detection integration module.

[0020] 1. When the servo motor drives the fan blade to rotate at a relatively high speed, the structure formed by the supporting rod and the shaft core will cause the rear disc body and the front disc body to move away from each other due to centrifugal force. During this process, the connecting rod will drive the blocking plate to move away from each other, and then the shell can communicate with the outside through the air duct, so that the outside air can enter the inside of the shell. During this process, the blocking plate will also block the through hole, so that the liquid storage tank is no longer communicated with the shell, so as to facilitate the detection integrated module to detect the volatile substances of dangerous chemicals contained in the air inhaled into the shell. When the servo motor stops and the rotation speed of the fan blade decreases, the rear disc body and the front disc body will approach each other under the action of the spring. At this time, not only the blocking plate will block the air duct to form a sealed environment inside the shell, but also the blocking plate will move away from the through hole, so that the liquid storage tank can communicate with the shell. Due to the rotation of the fan blade, negative pressure will still be generated, so that the air inside the shell will enter the liquid storage tank through the air inlet pipe under the sealed state, be processed by the liquid medicine in the liquid storage tank, and the processed air will flow back into the shell through the exhaust pipe, so that the volatile substances of the remaining dangerous chemicals inside the shell can be processed after the shell is sealed, avoiding the corrosion of the servo motor and the detection integrated module;

[0021] 2. The mounting seat and the liquid storage tank are connected by threads, and the liquid medicine in the liquid storage tank can be replaced after being used for a period of time, which is convenient for ensuring the treatment effect of the liquid medicine in the liquid storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is the front view structural schematic diagram of the present invention;

[0023] Figure 2 is the partial sectional view structural schematic diagram of the present invention;

[0024] Figure 3 is the present invention Figure 2 the enlarged structural schematic diagram of point A therein;

[0025] Figure 4 is the present invention Figure 2 the enlarged structural schematic diagram of point B therein;

[0026] Figure 5 is the connection structural schematic diagram of the blocking plate and the servo motor of the present invention;

[0027] Figure 6 is the present invention Figure 5 the enlarged structural schematic diagram of point C therein;

[0028] Figure 7 is the connection structural schematic diagram of the shell and the detection integrated module of the present invention;

[0029] Figure 8 is the rear view structural schematic diagram of the present invention.

[0030] In the figure: 1, base; 2, housing; 3, mounting seat; 4, liquid storage tank; 5, exhaust pipe; 6, intake pipe; 7, motor seat; 8, servo motor; 9, first shaft seat; 10, connecting shaft; 11, rear disc body; 12, front disc body; 13, second shaft seat; 14, connecting frame; 15, connecting disc; 16, connecting rod; 17, reinforcing plate; 18, fan blade; 19, mounting frame; 20, detection integration module; 21, blocking plate; 22, through hole; 23, plugging plate; 24, through hole; 25, wind tunnel; 26, support rod; 27, shaft core; 28, mounting shaft; 29, spring. Specific implementation manner

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figures 1-8 , the present invention provides the following technical solutions:

[0033] Embodiment 1: To solve the problem that the safety detector for hazardous chemical leakage in the past is not convenient for treating the volatile substances of the hazardous chemicals remaining inside it, the following technical solution is provided. Specifically, a safety detector for hazardous chemical leakage includes a housing 2 and a base 1 for supporting the housing 2. A purification mechanism is connected to the side end of the base 1 for purifying the chemicals remaining in the housing 2. Wind tunnels 25 are provided at both ends of the housing 2, and a motor base 7 is installed at one end inside the housing 2. A servo motor 8 is installed on the motor base 7, and the servo motor 8 is connected to a fan blade 18 through a centrifugal support mechanism. Four mounting shafts 28 are equiangularly arranged at the other end inside the housing 2, and the four mounting shafts 28 respectively pass through the four corners of a mounting frame 19 movably. A detection integration module 20 for detecting hazardous chemical leakage is installed inside the mounting frame 19. An acoustic-optic alarm structure is provided on the detection integration module 20 for timely alarming and reminding the staff after detecting hazardous chemical leakage. The centrifugal support mechanism includes two rear disc bodies 11 and front disc bodies 12 arranged face to face, and one ends of three support rods 26 are equiangularly pivotally connected to the opposite side surfaces of the rear disc body 11 and the front disc body 12. The other ends of the two opposite support rods 26 are pivotally connected to corresponding axles 27. Connecting discs 15 are pivotally connected to the opposite side surfaces of the rear disc body 11 and the front disc body 12, and connecting shafts 10 coaxial with them are provided on the opposite side surfaces of the rear disc body 11 and the front disc body 12. The connecting shafts 10 movably pass through the corresponding connecting discs 15. The two connecting shafts 10 also respectively extend into the inside of a shaft seat one 9 and a shaft seat two 13 movably. The shaft seat one 9 is coaxially and fixedly connected to the shaft end of the servo motor 8. The fan blade 18 is arranged outside the shaft seat two 13, and the shaft seat two 13 is axially penetrated by a connecting frame 14 coaxial with it. The connecting frame 14 is fixedly connected to the inner side of the housing 2. Springs 29 are provided between the inside of the shaft seat one 9 and the shaft seat two 13 and the corresponding connecting shafts 10. Three connecting rods 16 are equiangularly connected to the opposite side surfaces of the two connecting discs 15, and the connecting rods 16 on both sides respectively pass through the housing 2 movably through through holes 24 provided at both ends of the housing 2. The ends of the connecting rods 16 on the same side are connected by a blocking plate 21.

[0034] An annular protrusion is provided on the part of the housing 2 near the detection integration module 20. The inner diameter of the annular protrusion coincides with the farthest distance of the fan blade 18 from the axis of the second shaft seat 13, ensuring that during the rotation of the fan blade 18, the outside air can be effectively sucked into the interior of the housing 2. The connecting rod 16 connected by the front disc body 12 through the connecting disc 15 is zigzag, and the zigzag connecting rod 16 movably penetrates through the annular protrusion, improving the installation stability of the zigzag connecting rod 16. The connecting rod 16 connected by the rear disc body 11 through the connecting disc 15 is straight. Three protruding blocks are equiangularly arranged on the part of the housing 2 near the servo motor 8, and the three straight connecting rods 16 respectively movably penetrate through the three protruding blocks. The three straight protruding blocks also movably penetrate through the three corners of the reinforcing plate 17, and the reinforcing plate 17 is coaxially and bearing-connected to the outside of the first shaft seat 9. The slot holes for the first shaft seat 9 and the second shaft seat 13 to penetrate the connecting shaft 10 and the connecting shaft 10 are prismatic structures that match each other, so as to ensure that when the first shaft seat 9 and the second shaft seat 13 respectively generate relative displacements with the corresponding connecting shaft 10, the first shaft seat 9, the second shaft seat 13 and the connecting shaft 10 rotate synchronously. Two support rods 26 connected by the shaft core 27 form a V-shaped structure, and the tip of the V-shaped structure faces the axis of the front disc body 12.

[0035] The purification mechanism includes a mounting seat 3 for mounting the liquid storage tank 4. The upper end of the mounting seat 3 and the lower end of the liquid storage tank 4 are threadedly connected, and the mounting seat 3 is fixedly connected to the side end of the base 1. Two through holes 22 penetrating the inner and outer sides of the housing 2 are provided on the lower surface of the housing 2, and one end of the exhaust pipe 5 and one end of the intake pipe 6 are respectively and through-connected to the two through holes 22. The two through holes 22 are respectively arranged near the detection integration module 20 and the servo motor 8, and two plugging plates 23 are slidably connected to the inner bottom surface of the housing 2. The two plugging plates 23 are used to respectively plug the two through holes 22, and the two plugging plates 23 are respectively fixedly connected to the zigzag connecting rod 16 and the straight connecting rod 16. The other end of the exhaust pipe 5 is through-connected to the upper end of the liquid storage tank 4, and the other end of the intake pipe 6 is through-connected to the lower end of the mounting seat 3. During use, by controlling the rotation speed of the rear disc body 11 and the front disc body 12 by the servo motor 8, the distance between the rear disc body 11 and the front disc body 12 can be controlled, so that the blocking plate 21 can block the air duct 25, and the plugging plate 23 can be moved away from the through hole 22, thereby opening the through hole 22. At this time, when the fan blade 18 rotates, the air inside the housing 2 will be sucked into the liquid storage tank 4 through the intake pipe 6, and after being processed by the liquid medicine in the liquid storage tank 4, it will flow back into the housing 2 through the exhaust pipe 5, preventing the air containing volatile substances of dangerous chemicals from remaining inside the housing 2, so that the servo motor 8 and the detection integration module 20 inside the housing 2 are not corroded, which helps to improve the service life of the detector. A liquid medicine for absorbing dangerous chemicals is provided in the liquid storage tank 4, and the other end of the exhaust pipe 5 and the other end of the intake pipe 6 are respectively arranged above and below the liquid level of the liquid medicine. A one-way valve is provided at the other end of the intake pipe 6 to prevent the liquid medicine from flowing into the interior of the housing 2.

[0036] Embodiment 2: To solve the problem that after the safety detector for leakage of hazardous chemicals stops detecting, air exchange still occurs inside and outside it, which easily causes the volatile substances of hazardous chemicals to enter its interior. The following technical solution is provided. Specifically, the blocking plate 21 is composed of a metal disk body and a frustum-shaped rubber body. The connecting rods 16 are connected to the corresponding metal disk body at equal angles. The inner diameter value of the air duct 25 is between the maximum diameter value and the minimum diameter value of the corresponding frustum-shaped rubber body, ensuring that the frustum-shaped rubber body can completely block the corresponding air duct 25. During use, when the servo motor 8 drives the fan blade 18 to gradually stop rotating, the distance between the rear disk body 11 and the front disk body 12 will gradually decrease, and then the two blocking plates 21 will respectively block the two air ducts 25. At this time, the interior of the housing 2 will be in a sealed state, avoiding air exchange with the outside world, so as to prevent the air containing volatile substances of hazardous chemicals from entering the housing 2, which helps to ensure that after the air inside the housing 2 in the sealed state is treated, the air inside the housing 2 is clean, and further helps to ensure the service life of the detector.

[0037] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0038] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A safety detector for leaking hazardous chemicals, comprising a housing (2) and a base (1) for supporting the housing (2), characterized in that: The side end of the base (1) is connected to a purification mechanism for purifying chemicals retained in the shell (2); both ends of the shell (2) are provided with wind tunnels (25); one end of the shell (2) is provided with a motor seat (7); a servo motor (8) is installed on the motor seat (7); and the servo motor (8) is connected to the fan blade (18) through a centrifugal support mechanism; four installation shafts (28) are arranged at equal angles at the other end of the shell (2); and the four installation shafts (28) are respectively movable and penetrate the four corners of the installation frame (19); and a detection integrated module (20) for detecting leakage of dangerous chemicals is installed inside the installation frame (19).

2. A safety detector for dangerous chemical leakage according to claim 1, characterized in that: The detection integrated module (20) is provided with an audible and visual alarm structure for promptly sounding an alarm to remind staff members after a leak of hazardous chemicals is detected.

3. A safety detector for dangerous chemical leakage according to claim 2, characterized in that: The centrifugal support mechanism comprises two rear disc bodies (11) and a front disc body (12) arranged face to face, and the opposite sides of the rear disc body (11) and the front disc body (12) are axially connected with one end of three support rods (26) at equal angles, and the other ends of the two opposite support rods (26) are axially connected to the corresponding shaft core (27), and the opposite sides of the rear disc body (11) and the front disc body (12) are axially connected with a connecting disc (15), and the opposite sides of the rear disc body (11) and the front disc body (12) are both provided with a connecting shaft (10) coaxial therewith, and the connecting shaft (10) movably passes through the corresponding connecting disc (15), and the two connecting shafts (10) are also movably extended into the interior of the shaft seat 1 (9) and the shaft seat 2 (13), respectively. The shaft seat one (9) is coaxially fixedly connected to the shaft end of the servo motor (8), the fan blade (18) is arranged on the outer side of the shaft seat two (13), and the bearing of the shaft seat two (13) passes through the connecting frame (14) coaxial with it, and the connecting frame (14) is fixedly connected to the inner side of the shell (2), and springs (29) are arranged between the interior of the shaft seat one (9) and the shaft seat two (13) and the corresponding connecting shaft (10), and three connecting rods (16) are connected at equal angles to the opposite sides of the two connecting plates (15), and the connecting rods (16) on both sides are movably penetrated through the shell (2) through the through holes (24) set at both ends of the shell (2), and the ends of the connecting rods (16) on the same side are connected by a blocking plate (21).

4. A safety detector for dangerous chemical leakage according to claim 3, characterized in that: An annular protrusion is provided on the portion of the shell (2) near the detection integrated module (20), and the inner diameter of the annular protrusion coincides with the farthest distance between the fan blade (18) and the axis of the second shaft seat (13), thereby ensuring that during the rotation of the fan blade (18), external air can be effectively sucked into the interior of the shell (2); the connecting rod (16) connected to the front disk body (12) through the connecting disk (15) is in a broken line shape, and the broken line connecting rod (16) movably passes through the annular protrusion, thereby improving the stability of the installation of the broken line connecting rod (16).

5. A safety detector for dangerous chemical leakage according to claim 4, characterized in that: The connecting rod (16) connected to the rear plate (11) through the connecting plate (15) is linear, and three protrusions are arranged at equal angles on the part of the housing (2) close to the servo motor (8), and the three protrusions are respectively movably penetrated by three linear connecting rods (16), and the three linear protrusions also movably penetrate the three corners of the reinforcing plate (17), and the reinforcing plate (17) is coaxially connected to the outer side of the shaft seat (9).

6. A safety detector for dangerous chemical leakage according to claim 5, characterized in that: The slots of the shaft seat 1 (9) and the shaft seat 2 (13) for the connecting shaft (10) to pass through and the connecting shaft (10) are mutually matching prismatic structures, and are used to ensure that the shaft seat 1 (9), the shaft seat 2 (13) and the connecting shaft (10) rotate synchronously when the shaft seat 1 (9) and the shaft seat 2 (13) are respectively relatively displaced with the corresponding connecting shaft (10).

7. A safety detector for dangerous chemical leakage according to claim 6, characterized in that: The blocking plate (21) is composed of a metal disc and a truncated cone-shaped rubber body, and the connecting rod (16) is connected to the corresponding metal disc at an equal angle. The inner diameter value of the wind tunnel (25) is between the maximum diameter value and the minimum diameter value of the corresponding truncated cone-shaped rubber body, ensuring that the truncated cone-shaped rubber body can completely block the corresponding wind tunnel (25).

8. A safety detector for dangerous chemical leakage according to claim 7, characterized in that: Two supporting rods (26) connected by the shaft core (27) form a V-shaped structure, and the tip of the V-shaped structure faces the axis of the front disk body (12).

9. A safety detector for dangerous chemical leakage according to claim 8, characterized in that: The purification mechanism comprises a mounting seat (3) for mounting a liquid storage tank (4), the upper end of the mounting seat (3) and the lower end of the liquid storage tank (4) being threadedly connected, and the mounting seat (3) being fixedly connected to the side end of the base (1), the lower surface of the shell (2) being provided with two through holes (22) penetrating the inner and outer sides thereof, and the two through holes (22) are respectively connected to one end of the exhaust pipe (5) and one end of the intake pipe (6), and the two through holes (22) are respectively close to the detection integrated circuit. A module (20) and a servo motor (8) are provided, and two sealing plates (23) are slidably connected to the inner bottom surface of the shell (2), the two sealing plates (23) are used to respectively seal the two through holes (22), and the two sealing plates (23) are respectively fixedly connected to a zigzag connecting rod (16) and a straight connecting rod (16), the other end of the exhaust pipe (5) is connected to the upper end of the liquid storage tank (4), and the other end of the intake pipe (6) is connected to the lower end of the mounting seat (3).

10. A safety detector for dangerous chemical leakage according to claim 9, characterized in that: The liquid storage tank (4) contains a liquid for absorbing hazardous chemicals, and the other end of the exhaust pipe (5) and the other end of the air intake pipe (6) are respectively arranged above and below the liquid level of the liquid, and a one-way valve is arranged on the other end of the air intake pipe (6) to prevent the liquid from flowing into the interior of the housing (2).

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