CN112489264B

CN112489264B - Entrance guard's device for parking area based on thing networking auto-induction recognition function

Info

Publication number: CN112489264B
Application number: CN202011312554.7A
Authority: CN
Inventors: 张春凤; 葛成娟
Original assignee: Shenzhen Ruidiyou Technology Co ltd
Current assignee: Shenzhen ruidiyou Technology Co.,Ltd.
Priority date: 2020-11-20
Filing date: 2020-11-20
Publication date: 2021-12-24
Anticipated expiration: 2040-11-20
Also published as: CN112489264A

Abstract

The invention discloses an entrance guard device for a parking lot based on an automatic sensing and identifying function of the Internet of things, which comprises a base, a rotating disc, a rotating handle, a rotating column, a second screw, a fixing block, a rotating strip, a spring bottom plate, a supporting frame and a water pump, wherein an anti-theft box is arranged above the base, the first screw is arranged in the anti-theft box, a supporting leg is arranged above the base, the water pump is arranged on the right side of the supporting frame, and a liquid tank is arranged on the right side of the water pump. This entrance guard's device for parking area based on thing networking auto-induction recognition function is provided with first screw and rotating disc, in the use, the motor can not work when having a power failure, open the shutter of burglary-resisting case top with the key, twist and move first screw, make first screw rebound in the base, thereby make first screw below and first through-hole break away from, the pulling is rotated the handle and is made the supporting leg can rotate above the base this moment, thereby make and to open entrance guard manually, the functionality of device has been increased.

Description

Entrance guard's device for parking area based on thing networking auto-induction recognition function

Technical Field

The invention relates to the technical field of parking lot entrance guards, in particular to a parking lot entrance guard device based on an Internet of things automatic induction recognition function.

Background

Along with the development of the times, more and more families own automobiles, automobiles are popularized to a certain degree, parking lots are arranged in public areas such as communities or squares to provide parking places for people, and in order to manage parking of the automobiles, access control devices are usually arranged at entrances and exits of the parking lots, the automobiles need to be scanned and record license plates through the access control devices before entering the parking lots, and then are opened, so that the automobiles can be managed in and out, the entering and exiting of external automobiles are avoided, and the entering and exiting time of the automobiles can be conveniently recorded, so that reasonable charging processing is carried out on the automobiles.

But the parking lot entrance guard device on the market still has some shortages at present, for example: when having a power failure, the railing is forbidden, at this moment the entering of car will block, thereby can not carry out artifical emergency treatment to this condition, and present entrance guard railing causes the scratch easily to the car, the car is careless slightly will lead to its and entrance guard railing to produce the collision, very big loss has been caused, and the railing can rot after long-time use, perhaps is run into the damage by the car, and now, entrance guard railing all is inconvenient the change, so maintain it and can waste a large amount of time and manpower, and because the severity of epidemic situation, lead to can not carrying out automatic disinfection to the car of business turn over.

Therefore, the entrance guard device for the parking lot based on the automatic sensing and identifying function of the internet of things is provided so as to solve the problems.

Disclosure of Invention

The invention aims to provide an entrance guard device for a parking lot based on an automatic sensing and identifying function of the Internet of things, and aims to solve the problems that the existing entrance guard device for the parking lot in the market is inconvenient to replace a railing, open when power is off and cannot protect an automobile from colliding with the railing.

In order to achieve the purpose, the invention provides the following technical scheme: an entrance guard device for a parking lot based on an automatic sensing and recognition function of the Internet of things comprises a base, a rotating disc, a rotating handle, a rotating column, a second screw, a fixed block, a rotating strip, a spring bottom plate, a support frame and a water pump, wherein an anti-theft box is installed above the base, a first screw is installed inside the anti-theft box, a support leg is installed above the base, the rotating disc is installed below the support leg, a first through hole is formed inside the rotating disc, a license plate detector is installed in front of the support leg, the rotating handle is installed on the left side of the support leg, a rotating groove is formed inside the upper portion of the support leg, a linkage switch is installed inside the rotating groove, the rotating column is installed in the rotating groove, a slot is formed inside the rotating column, a railing is installed outside the rotating column, a reflecting strip is installed in front of the railing, and a rain baffle is installed above the railing, and the outer side of the left end of the handrail is provided with a connecting block, the second screw is arranged in the connecting block, the end of the handrail is provided with an inserting column, the front part of the left side of the handrail is provided with a fixed support, the inside of the handrail is provided with a cylindrical through hole, the fixed block is arranged in the front part of the handrail, the side surface of the fixed block is provided with a first spring, the outer side of the first spring is provided with a buffer block, the inner side of the buffer block is provided with a moving column, the inside of the supporting leg is provided with a servo motor, the front side and the back side of the rotating column are respectively provided with a first rotating shaft and a second rotating shaft, the rotating strip is arranged in the supporting leg, the side surface of the rotating strip is provided with a rotating strip shaft, the back side of the rotating strip is provided with a second spring, the spring bottom plate is connected with the second spring, the inner side of the spring bottom plate is provided with a hook, the supporting frame is arranged on the right side of the handrail, and the supporting frame is provided with a water through pipe, and the atomizing nozzle is installed to support frame top side, the water pump is installed on the support frame right side, and the water pump right side is provided with the liquid tank.

Preferably, the first screw is in threaded connection with the upper portion of the base, the first screw can be clamped with the first through hole in the upper portion of the rotating disk, and the first through hole is provided with 2 through holes which are equidistant relative to the center of the rotating disk.

Preferably, the rotating disc is clamped with the groove in the base, the center of the rotating disc and the center of the supporting leg are on the same axis, and the size of the rotating disc in the groove in the base is larger than that of the connecting end of the rotating disc and the supporting leg.

Preferably, the rotary column is engaged with the rotary groove, the length of the rotary column is greater than that of the rotary groove, the first rotary shaft behind the rotary groove is connected with a shaft of the servo motor, and the linkage switch in the rotary groove is arranged above the rotary groove.

Preferably, groove between the connecting block can with the mutual block of right-hand member of column spinner, and the post of inserting between the connecting block can with the mutual block of slot to connecting block and second screw threaded connection, the second screw can with the inside through-hole looks block of column spinner in addition, the second screw sets up 2 about the connecting block symmetry simultaneously.

Preferably, the size that removes the post inner is greater than the through-hole size of cylindricality through-hole outer end, and removes the mutual block of post and cylindricality through-hole to the first spring of removing the post both sides is installed between fixed block and buffer block, and the rubber packing is installed in the buffer block outside moreover.

Preferably, the first rotating shaft and the second rotating shaft are connected in the rotating groove, the second rotating shaft is connected with the rotating strip shaft, the rotating strip shaft and the rotating strip shaft are connected in a groove inside the supporting leg, and the right end of the rotating strip is outside the supporting leg.

Preferably, the second spring is connected between the spring bottom plate and the rotating strip, and the clamping hook on the inner side of the spring bottom plate is clamped with the clamping buckle in front of the fixing support.

Preferably, the atomizing nozzle is connected with a through hole of the water pipe, the water pipe is connected with a through hole of a water outlet of the water pump, and a water inlet of the water pump is connected with a through hole of the liquid tank.

Compared with the prior art, the invention has the beneficial effects that: the entrance guard device for the parking lot based on the automatic induction and identification function of the Internet of things;

1. the door guard is provided with a first screw and a rotating disc, when the power is off in the use process, the motor cannot work, a shutter above the anti-theft box is opened by a key, the first screw is screwed, so that the first screw moves upwards in the base, the lower part of the first screw is separated from the first through hole, the rotating handle is pulled at the moment, the supporting leg can rotate above the base, and meanwhile, the rotating disc rotates in a groove in the base, so that the door guard can be opened manually, and the functionality of the device is improved;

2. the connecting block is arranged, when the handrail is damaged and needs to be replaced in the using process, the second screw is twisted to move outwards in the connecting block, so that the inner end of the second screw is separated from the through hole in the side face of the rotating column, the inserting column at the left end of the handrail can be separated from the inserting slot by pulling the handrail at the moment, and meanwhile, the connecting block is separated from the rotating column, so that the handrail can be replaced, the problem that the whole device needs to be replaced due to the damage of the handrail is avoided, the replacement cost is saved, and the practicability of the device is improved;

3. the buffer block is moved inwards, the moving column slides towards the inside of the cylindrical through hole, and the first spring enables the extrusion to generate buffer force, so that damage caused by slight collision is reduced, and the functionality of the device is improved;

4. be provided with atomizing nozzle, in the use, when the car process, the water pump operation inhales the water service pipe with the inside antiseptic solution of liquid tank, then discharges through atomizing nozzle atomizing for can disinfect to the vehicle of process, increase the practicality of device.

Drawings

FIG. 1 is a schematic front view of the present invention;

FIG. 2 is a schematic main sectional view of the present invention;

FIG. 3 is a schematic view of a partial cross-sectional top view of the present invention;

FIG. 4 is a top cross-sectional view of the rotatable disk of the present invention;

FIG. 5 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 6 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 3 at C according to the present invention.

In the figure: 1. a base; 2. an anti-theft box; 3. a first screw; 4. supporting legs; 5. rotating the disc; 6. a first through hole; 7. a license plate detector; 8. rotating the handle; 9. rotating the groove; 10. a ganged switch; 11. a spin column; 12. a slot; 13. a railing; 14. a light-reflecting strip; 15. a rain shield; 16. connecting blocks; 17. a second screw; 18. inserting a column; 19. fixing a bracket; 20. a cylindrical through hole; 21. a fixed block; 22. a first spring; 23. a buffer block; 24. moving the column; 25. a servo motor; 26. a first rotating shaft; 27. a second rotating shaft; 28. rotating the strip; 29. a rotating shaft; 30. a second spring; 31. A spring bottom plate; 32. a hook; 33. a support frame; 34. a water pipe; 35. an atomizing nozzle; 36. a water pump; 37. a liquid tank.

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.

Referring to fig. 1-7, the present invention provides a technical solution: an entrance guard device for a parking lot based on an Internet of things automatic induction recognition function comprises a base 1, an anti-theft box 2, a first screw 3, a supporting leg 4, a rotating disc 5, a first through hole 6, a license plate detector 7, a rotating handle 8, a rotating groove 9, a linked switch 10, a rotating column 11, an inserting groove 12, a railing 13, a reflecting strip 14, a rain baffle 15, a connecting block 16, a second screw 17, an inserting column 18, a fixing support 19, a cylindrical through hole 20, a fixing block 21, a first spring 22, a buffer block 23, a moving column 24, a servo motor 25, a first rotating shaft 26, a second rotating shaft 27, a rotating strip 28, a rotating strip shaft 29, a second spring 30, a spring bottom plate 31, a clamping hook 32, a supporting frame 33, a water pipe 34, an atomizing nozzle 35, a water pump 36 and a liquid tank 37, wherein the anti-theft box 2 is installed above the base 1, the first screw 3 is installed inside the anti-theft box 2, and the supporting leg 4 is installed above the base 1, the rotary disc 5 is arranged below the supporting leg 4, a first through hole 6 is arranged in the rotary disc 5, a license plate detector 7 is arranged in front of the supporting leg 4, the rotary handle 8 is arranged on the left side of the supporting leg 4, a rotary groove 9 is arranged in the upper portion of the supporting leg 4, a linkage switch 10 is arranged in the rotary groove 9, the rotary column 11 is arranged in the rotary groove 9, a slot 12 is arranged in the rotary column 11, a railing 13 is arranged on the outer side of the rotary column 11, a light reflecting strip 14 is arranged in front of the railing 13, a rain baffle 15 is arranged above the railing 13, a connecting block 16 is arranged on the outer side of the left end of the railing 13, a second screw 17 is arranged in the connecting block 16, an inserting column 18 is arranged at the end of the railing 13, a fixing bracket 19 is arranged on the front of the left side of the railing 13, a cylindrical through hole 20 is arranged in the railing 13, a fixing block 21 is arranged in front of the railing 13, and a first spring 22 is arranged on the side surface of the fixing block 21, and buffer block 23 is installed outside first spring 22, removal post 24 is installed to buffer block 23 inboard, supporting leg 4 internally mounted has servo motor 25, first pivot 26 and second pivot 27 are installed respectively to the back both sides around the column spinner 11, rotatory rectangular 28 is installed in supporting leg 4, and rotatory rectangular 28 side-mounting has a commentaries on classics strip axle 29, and install second spring 30 behind rotatory rectangular 28, spring bottom 31 is connected with second spring 30, and spring bottom 31 inboard installs pothook 32, support frame 33 is installed on railing 13 right side, and support frame 33 is inside to be provided with water service pipe 34, and support frame 33 top side-mounting has atomizing nozzle 35, water pump 36 installs on support frame 33 right side, and water pump 36 right side is provided with liquid tank 37.

First screw 3 and base 1 top threaded connection, and first screw 3 can with the first through-hole 6 looks block of carousel 5 top to first through-hole 6 is provided with 2 about 5 center equidistance of carousel, the design of above-mentioned structure for first screw 3 can twist in to first through-hole 6, thereby fixes carousel 5, has increased the functionality of device.

The mutual block of recess of rotating disc 5 and base 1 inside, and the center of rotating disc 5 and supporting leg 4 is on same axis, and the size of rotating disc 5 in the inside recess of base 1 is greater than its size with the 4 links of supporting leg, the design of above-mentioned structure, make rotating disc 5 can rotate in the recess of base 1 inside, avoided supporting leg 4 to break away from or take place the skew above rotating in-process and base 1, increased the stability of device.

The mutual block of column spinner 11 and rotary trough 9, and the length of column spinner 11 is greater than the length of rotary trough 9, and the axle of first pivot 26 and servo motor 25 at rotary trough 9 rear is connected, and the gang switch 10 of rotary trough 9 inside is in the top of rotary trough 9, the design of above-mentioned structure, make the operation of control servo motor 25 can make first pivot 26 rotate, thereby make column spinner 11 can be rotatory in rotary trough 9, thereby it is rotatory to drive railing 13, the opening and closing of railing 13 has been realized, the functionality of device has been increased.

Groove between the connecting blocks 16 can be mutually blocked with the right end of the rotary column 11, and the inserted column 18 between the connecting blocks 16 can be mutually blocked with the slot 12, and the connecting blocks 16 are in threaded connection with the second screw 17, and the second screw 17 can be blocked with the through hole inside the rotary column 11, and simultaneously the second screw 17 is provided with 2 symmetrical about the connecting blocks 16, the design of the structure is realized, so that the groove of the rotary column 11 can be inserted into the groove between 2 connecting blocks 16, and simultaneously the inserted column 18 at the left end of the handrail 13 can be inserted into the slot 12, and then the second screw 17 is screwed to fix the connecting blocks 16 and the rotary column 11, thereby realizing the fixation of the handrail 13 and increasing the functionality of the device.

The size that removes post 24 the inner is greater than the through-hole size of cylindricality through-hole 20 outer end, and remove post 24 and the mutual block of cylindricality through-hole 20, and the first spring 22 that removes post 24 both sides is installed between fixed block 21 and buffer block 23, and the rubber packing is installed to the buffer block 23 outside, the design of above-mentioned structure, make buffer block 23 receive the extrusion can make and remove post 24 and slide in cylindricality through-hole 20, first spring 22 can realize cushioning effect simultaneously, the functionality of device has been increased.

The first rotating shaft 26 and the second rotating shaft 27 are connected in the rotating groove 9 in a shaft mode, the second rotating shaft 27 is connected with the rotating strip shaft 29, the rotating strip shaft 29 and the rotating strip 28 are connected in the groove inside the supporting leg 4 in a shaft mode, the right end of the rotating strip 28 is located outside the supporting leg 4, and due to the design of the structure, the rotating strip shaft 29 can be driven to rotate by the rotating of the second rotating shaft 27, the rotating strip 28 can rotate in the groove middle shaft inside the supporting leg 4, and the practicability of the device is improved.

The second spring 30 is connected between the spring bottom plate 31 and the rotary strip 28, and the hook 32 on the inner side of the spring bottom plate 31 is clamped with the buckle in front of the fixing bracket 19, and the design of the structure ensures that the railing 13 is bent backwards when the railing 13 is collided, and the second spring 30 can play roles of buffering and stretching, thereby increasing the stability of the device.

The atomizing nozzle 35 is connected with the through hole of the water pipe 34, the water pipe 34 is connected with the through hole of the water outlet of the water pump 36, the water inlet of the water pump 36 is connected with the through hole of the liquid tank 37, and the design of the structure enables the water pump 36 to operate, so that the disinfectant in the liquid tank 37 enters the water pipe 34 and then is discharged through the atomizing nozzle 35, and the functionality of the device is improved.

The working principle is as follows: when the parking lot access control device based on the internet of things automatic sensing and recognition function is used, firstly, when an automobile moves to the front of the railing 13, the license plate detector 7 can generate sensing, at the moment, the water pump 36 operates to suck disinfectant in the liquid tank 37 into the water pipe 34, then the disinfectant is atomized and discharged through the atomizing nozzle 35 to disinfect passing vehicles, then the servo motor 25 operates to drive the first rotating shaft 26 and the second rotating shaft 27 to rotate, so that the rotating column 11 can rotate in the rotating groove 9, meanwhile, the rotating shaft 29 can be driven to rotate by the rotation of the second rotating shaft 27, so that the rotating strip 28 is driven to rotate, meanwhile, the railing 13 can rotate upwards, the opening of the railing 13 is realized, then, the automobile can pass, when the automobile collides the railing 13, the railing 13 is bent backwards, at the moment, the second spring 30 can play roles of buffering and stretching, simultaneously the car produces the extrusion to buffer block 23, and the rubber gasket in the buffer block 23 outside has avoided causing the mar to the car, and buffer block 23 moves to the inboard simultaneously, removes the inside slip of post 24 to cylindricality through-hole 20 simultaneously, and first spring 22 makes the extrusion can produce the cushion effect this moment, has reduced the harm that the collision caused.

When needing to change railing 13, control servo motor 25 operation makes railing 13 rotatory to the top, at this moment, twist and move second screw 17, make second screw 17 outwards remove in connecting block 16, make the inner of second screw 17 break away from with the through-hole of column 11 side, pulling railing 13 this moment can make inserting of railing 13 left end post 18 break away from with slot 12 mutually, connecting block 16 and column 11 separate simultaneously, make and to change railing 13, avoided because damage of railing 13 needs to change the device wholly, and the replacement cost is saved.

When having a power failure, the motor can not work, opens the shutter above 2 of alarm box with the key, twists and moves first screw 3 for first screw 3 upwards moves in base 1, thereby makes first screw 3 below break away from with first through-hole 6, and the pulling is rotated handle 8 and is made supporting leg 4 rotate in base 1 top this moment, rotates disc 5 simultaneously and rotates in the recess of base 1 inside, thereby makes and to open the entrance guard manually, has made things convenient for and has carried out emergency treatment to it.

To thereby carry out a series of tasks, the contents of which are not described in detail in the present specification are prior art well known to those skilled in the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides an entrance guard's device for parking area based on thing networking auto-induction recognition function, includes base (1), rotating disc (5), rotates handle (8), column spinner (11), second screw (17), fixed block (21), rotatory rectangular (28), spring bottom plate (31), support frame (33) and water pump (36), its characterized in that: the anti-theft box (2) is installed above the base (1), a first screw (3) is installed inside the anti-theft box (2), the supporting leg (4) is installed above the base (1), the rotating disc (5) is installed below the supporting leg (4), a first through hole (6) is formed inside the rotating disc (5), the license plate detector (7) is installed in front of the supporting leg (4), the rotating handle (8) is installed on the left side of the supporting leg (4), the rotating groove (9) is formed inside the upper portion of the supporting leg (4), the linkage switch (10) is installed inside the rotating groove (9), the rotating column (11) is installed in the rotating groove (9), the slot (12) is formed inside the rotating column (11), the railing (13) is installed on the outer side of the rotating column (11), and the light reflecting strip (14) is installed in front of the railing (13), and a rain shield (15) is installed above the railing (13), a connecting block (16) is installed outside the left end of the railing (13), a second screw (17) is installed in the connecting block (16), an inserting column (18) is installed at the end of the railing (13), a fixing support (19) is installed in front of the left side of the railing (13), a cylindrical through hole (20) is formed in the railing (13), a fixing block (21) is installed in front of the railing (13), a first spring (22) is installed on the side surface of the fixing block (21), a buffer block (23) is installed outside the first spring (22), a movable column (24) is installed on the inner side of the buffer block (23), a servo motor (25) is installed inside the supporting leg (4), a first rotating shaft (26) and a second rotating shaft (27) are installed on the front side and the rear side of the rotating column (11), and a rotating strip (28) is installed in the supporting leg (4), and rotatory rectangular (28) side-mounting has commentaries on classics strip axle (29) to second spring (30) are installed to rotatory rectangular (28) rear, spring bottom plate (31) are connected with second spring (30), and spring bottom plate (31) inboard installs pothook (32), install on railing (13) right side support frame (33), and support frame (33) inside is provided with water service pipe (34), and support frame (33) top side-mounting has atomizing nozzle (35), install on support frame (33) right side water pump (36), and water pump (36) right side is provided with liquid tank (37).

2. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: first screw (3) and base (1) top threaded connection, and first screw (3) can with the first through-hole (6) looks block in carousel (5) top, and first through-hole (6) are provided with 2 about carousel (5) center equidistance.

3. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the rotary disc (5) is clamped with the groove in the base (1) mutually, the centers of the rotary disc (5) and the supporting legs (4) are on the same axis, and the size of the rotary disc (5) in the groove in the base (1) is larger than that of the connecting end of the rotary disc and the supporting legs (4).

4. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the rotary column (11) and the rotary groove (9) are mutually clamped, the length of the rotary column (11) is larger than that of the rotary groove (9), a first rotary shaft (26) behind the rotary groove (9) is connected with a shaft of a servo motor (25), and a linkage switch (10) inside the rotary groove (9) is arranged above the rotary groove (9).

5. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: groove between connecting block (16) can with the mutual block of right-hand member of column spinner (11), and insert post (18) between connecting block (16) can with slot (12) mutual block to connecting block (16) and second screw (17) threaded connection, second screw (17) can with the inside through-hole looks block of column spinner (11) moreover, and second screw (17) are provided with 2 about connecting block (16) symmetry simultaneously.

6. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the size that removes post (24) inner is greater than the through-hole size of cylindricality through-hole (20) outer end, and removes post (24) and cylindricality through-hole (20) block each other to first spring (22) of removing post (24) both sides are installed between fixed block (21) and buffer block (23), and rubber gasket is installed in buffer block (23) outside moreover.

7. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the first rotating shaft (26) and the second rotating shaft (27) are connected in a rotating groove (9) in a shaft mode, the second rotating shaft (27) is connected with a rotating strip shaft (29), the rotating strip shaft (29) and a rotating strip (28) are connected in a groove in the supporting leg (4) in a shaft mode, and the right end of the rotating strip (28) is located outside the supporting leg (4).

8. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the second spring (30) is connected between the spring bottom plate (31) and the rotating strip (28), and a hook (32) on the inner side of the spring bottom plate (31) is clamped with a buckle in front of the fixed support (19).

9. The access control device for the parking lot based on the automatic induction and recognition function of the internet of things according to claim 1, characterized in that: the atomizing nozzle (35) is connected with a through hole of the water pipe (34), the water pipe (34) is connected with a through hole of a water outlet of the water pump (36), and a water inlet of the water pump (36) is connected with a through hole of the liquid tank (37).