CN211369903U - Liquid injection port - Google Patents

Abstract

The utility model discloses a liquid injection port, which comprises a liquid port seat and a liquid port cover, wherein the liquid port seat is provided with a liquid feeding channel, and the liquid port cover is rotationally connected with the liquid port seat; one of the liquid port cover and the liquid port seat is provided with a lock tongue, the other is provided with a locking piece, the outer wall of the lock tongue is provided with a lock groove, and the locking piece can slide into or out of the lock groove by pressing the liquid port cover so as to unlock or lock the liquid port cover; still including strengthening the latch mechanism, strengthen the latch mechanism and include the lock beam, the outer wall of spring bolt is equipped with the locking cooperation portion of cell type or pass, the lock beam peg graft in during the locking cooperation portion, the liquid flap deadlocking. The liquid injection port comprises two-stage locking mechanisms, the first-stage locking mechanism is convenient to operate, and the second-stage locking mechanism is high in safety.

Description

Liquid injection port

Technical Field

The utility model relates to a technical field of liquid filler structure, concretely relates to annotate liquid mouth.

Background

The notes liquid mouth of car as a house water tank is the important component part of car as a house liquid road system, and the life of direct influence car as a house is used liquid, and the notes liquid mouth that uses on the car as a house generally adopts mechanical lock, when unblanking and locking, all will use the key to insert foretell mechanical lock, and this kind of locking structure security is poor.

Therefore, how to provide a solution to overcome the above-mentioned drawbacks remains a technical problem to be solved by those skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an annotate liquid mouth, this notes liquid mouth is equipped with two-stage locking mechanical system, and first order locking mechanical system convenient operation, second level locking mechanical system security height.

In order to solve the technical problem, the utility model provides a liquid injection port, which comprises a liquid port seat and a liquid port cover, wherein the liquid port seat is provided with a liquid feeding channel, and the liquid port cover is rotationally connected with the liquid port seat; one of the liquid port cover and the liquid port seat is provided with a lock tongue, the other is provided with a locking piece, the outer wall of the lock tongue is provided with a lock groove, and the locking piece can slide into or out of the lock groove by pressing the liquid port cover so as to unlock or lock the liquid port cover; still including strengthening the latch mechanism, strengthen the latch mechanism and include the lock beam, the outer wall of spring bolt is equipped with the locking cooperation portion of cell type or pass, the lock beam peg graft in during the locking cooperation portion, the liquid flap deadlocking.

So set up, above-mentioned notes liquid mouth has actually included two-stage locking mechanical system: the first-stage locking mechanism is a locking mechanism with a bolt matched with the locking piece, and the locking mechanism can be unlocked or locked by pressing the hydraulic port cover, so that the operation is convenient and fast; second level locking mechanical system is for strengthening the latch mechanism, strengthens the latch mechanism and moves after aforementioned first level locking mechanical system locking, moves when the liquid mouth lid lock closes the liquid mouth seat promptly, and its lock beam can be pegged graft in locking cooperation portion to lock the liquid mouth lid and die, at this moment, press the liquid mouth lid again and also can't carry out the unblock, can improve the security.

Optionally, strengthen the latch mechanism and still include the driver part, the driver part with the arc drive is connected, can drive the arc moves.

Optionally, the driving part is a motor, the motor can drive a transmission disc to rotate, and a disc surface of the transmission disc is provided with a path groove; the lock comprises a lock beam and is characterized by further comprising a positioning guide part, the lock beam is in sliding connection with the positioning guide part, a clamping block is arranged at one end of the lock beam and is inserted into the path groove, and when the motor rotates, the groove side wall of the path groove can act with the clamping block to drive the lock beam to extend or retract.

Optionally, a rotating shaft of the motor is connected with a gear, the transmission disc is provided with an inner gear ring, and the gear can be meshed with the inner gear ring.

Optionally, the locking bolt comprises a first tongue portion and a second tongue portion, the second tongue portion being adjacent to the mounting part of the locking bolt relative to the first tongue portion; the outer wall of the first tongue part is provided with a plurality of first convex blocks arranged at intervals along the circumferential direction, each first convex block is provided with the locking groove, the outer wall of the second tongue part is provided with a second convex block, each second convex block is provided with a plurality of first guide parts and a plurality of second guide parts, the first guide parts are opposite to an in-out gap between every two adjacent first convex blocks and one groove side wall of the locking groove, and the first guide parts can guide the locking piece in the in-out gap to the locking groove; the first lug is further provided with a first guide surface, the second guide portion is opposite to the groove bottom of the locking groove, the locking piece in the locking groove can be guided to the position opposite to the first guide surface, and the first guide surface can guide the locking piece to the access gap.

Optionally, the second bump comprises a plurality of opposite-seam convex pieces arranged at intervals along the circumferential direction, an opposite-groove convex piece is arranged between every two adjacent opposite-seam convex pieces, and the opposite-seam convex pieces and the opposite-groove convex pieces are both provided with second guide surfaces inclined towards the same direction; in the circumferential gap between the butt-joint convex part and the adjacent butt-joint convex part, a locking guide gap is arranged opposite to one groove side wall of the locking groove, an unlocking guide gap is arranged opposite to the first guide surface, the second guide surface of the butt-joint convex part and the adjacent locking guide gap are combined to form the first guide part, and the second guide surface of the butt-joint convex part and the adjacent unlocking guide gap are combined to form the second guide part.

Optionally, an end of the liquid inlet seat facing the liquid inlet cover is provided with a slot, the liquid feeding channel is connected with a bottom of the slot, and an illuminating lamp is arranged in the slot; and/or, still include level sensor and alarm, level sensor install in the liquid mouth seat for monitor liquid level, level sensor with alarm signal connection.

Optionally, a power supply circuit of the illuminating lamp is provided with an on-off switch, when the liquid port cover is in a locked state, the on-off switch is turned off, and when the liquid port cover is in an opened state, the on-off switch is turned on; and/or, further comprising a vent hole for communicating the inside and outside of the liquid containing tank.

Optionally, the liquid filling device further comprises a plug for plugging the liquid filling channel, a placing part is arranged on one surface, facing the liquid inlet seat, of the liquid inlet cover, and the plug in a pulled-out state can be placed on the placing part.

Optionally, the liquid port cover locking device further comprises a torsion spring, one extending end of the torsion spring is fixed, the other extending end of the torsion spring is connected with the liquid port cover, and the locking process of the liquid port cover is the increasing process of the deformation of the torsion spring.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a liquid filling port provided in the present invention;

FIG. 2 is a schematic view of the locking element mounted to the port base;

FIG. 3 is a schematic view of the locking element;

fig. 4 is a schematic structural view of the locking tongue;

fig. 5 is an expanded view of a side wall of the locking bolt of fig. 4;

fig. 6 is an expanded view of a side wall of another locking bolt;

FIG. 7 is a side view of the pouring outlet;

FIG. 8 is a view of the engagement of the enhanced lock mechanism with the deadbolt;

FIG. 9 is a view showing the connection structure of the lock beam, the positioning guide, and the driving plate;

fig. 10 is a top view of fig. 9.

The reference numerals in fig. 1-10 are illustrated as follows:

1, a liquid port seat, 11 liquid adding channels, 12 locking parts, 121 locking blocks, 13 reinforced locking mechanisms, 131 locking beams, 131a clamping blocks, 132 driving parts, 133 driving discs, 133a path grooves, 133b annular gears, 134 positioning guide parts, 14 grooves, 15 illuminating lamps, 16 vent holes and 17 plugs;

2 liquid port cover, 21 bolt, 211 first lug, 211a locking groove, 211b in-out gap, 211c first guide surface, 211d locking matching part, 212 second lug, 212a to-groove convex piece, 212b to-groove convex piece, 212c second guide surface, 212d locking guide gap, 212e unlocking guide gap, 22 magnet and 23 placing part.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As used herein, the term "plurality" refers to an indefinite number of plural, usually more than two; and when the term "plurality" is used to indicate a quantity of a particular element, it does not indicate a quantitative relationship between such elements.

The terms "first", "second", and the like, as used herein are used for convenience only to describe two or more structures or components that are the same or similar in structure, and do not denote any particular limitation on the order.

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a liquid injection port according to the present invention.

As shown in fig. 1, the utility model provides a liquid injection port, which comprises a liquid port base 1 and a liquid port cover 2, wherein the liquid port base 1 is provided with a liquid feeding channel 11 for communicating the inside of a liquid containing box, and the liquid port cover 2 is rotationally connected with the liquid port base 1; one of the liquid port cover 2 and the liquid port base 1 is provided with a lock tongue 21, the other is provided with a locking piece 12, the outer wall of the lock tongue 21 is provided with a lock groove 211a, and the locking piece 12 can slide into or out of the lock groove 211a by pressing the liquid port cover 2 so as to unlock or lock the liquid port cover 2; still including strengthening lock mechanism 13, strengthen lock mechanism 13 and include lock beam 131, the outer wall of spring bolt 21 is equipped with the locking cooperation portion 211d of cell type or pass, and lock beam 131 pegs graft when locking cooperation portion 211d, and liquid mouthful lid 2 deadlocks.

So set up, above-mentioned notes liquid mouth has actually included two-stage locking mechanical system: the first-stage locking mechanism is a locking mechanism with a bolt 21 matched with the locking piece 12, and the locking mechanism can be unlocked or locked by pressing the hydraulic port cover 2, so that the operation is convenient and fast; second level locking mechanical system is for strengthening latch mechanism 13, strengthens latch mechanism 13 and moves after aforementioned first level locking mechanical system locking, moves when liquid mouthful seat 1 at 2 locks of liquid mouthful lid promptly, and its lock beam 131 can be pegged graft in locking cooperation portion 211d to lock extremely liquid mouthful lid 2, at this moment, press liquid mouthful lid 2 again and also can't carry out the unblock, can improve the security.

Above-mentioned first order locking mechanical system, the mechanism that realizes unblock or locking through the mode of pressing promptly is comparatively common among the prior art, its structural style the embodiment of the utility model provides a do not limit, when concrete implementation, technical staff in the field can set for according to actual need. In order to make the structure of the liquid filling opening of the present invention clearer, the following description only describes the structure of two specific first locking mechanisms with reference to the accompanying drawings.

Referring to fig. 2-6, fig. 2 is a schematic view of the locking element mounted on the spout seat, fig. 3 is a schematic view of the locking element, fig. 4 is a schematic view of the latch bolt, fig. 5 is an expanded view of the latch bolt in fig. 4, and fig. 6 is an expanded view of another latch bolt.

As shown in fig. 2 and 3, the locking element 12 may include an annular body, the inner wall of the annular body may be provided with one or more locking pieces 121, and when the number of the locking pieces 121 is multiple, the locking pieces 121 may be arranged at intervals along the circumferential direction, and the aforementioned sliding of the locking element 12 into and out of the locking groove 211a actually means that the locking pieces 121 slide into and out of the locking groove 211a, and the locking element 12 may be driven to rotate in the circumferential direction.

The locking bolt 21 can be divided into two parts in the axial direction, which are a first tongue part and a second tongue part respectively, and the second tongue part is closer to the mounting part of the locking bolt 21 relative to the first tongue part, in the scheme of the figure, the locking bolt 21 is mounted on the liquid level cover 2, that is, the second tongue part is closer to the liquid level cover 2.

The outer wall of the first tongue portion may be provided with a plurality of first protrusions 211 arranged at intervals along the circumferential direction, each first protrusion 211 may be provided with a locking groove 211a, the locking groove 211a is a substantially V-shaped groove, and includes two groove side walls, the intersection of the two groove side walls forms a groove bottom (the groove bottom may be in smooth transition or may form an acute angle), an access gap 211b is formed between two circumferentially adjacent first protrusions 211, the outer wall of the second tongue portion may be provided with a second protrusion 212, the second protrusion 212 is provided with a plurality of first guide portions and a plurality of second guide portions, the first guide portions may be opposite to one access gap 211b (which is opposite along the axial direction, and will not be described below again), when the liquid outlet cover 2 is pressed, the locking block 121 may slide to the first guide portions along the access gap 211b, and the first guide portions may also be opposite to one groove side wall of the locking groove 211a, under the action of the first guide portions, the locking piece 121 can also slide to be opposite to the groove side wall, and at the moment, the pressing is released, and the locking piece 121 can slide to the groove side wall and slide to the groove bottom of the locking groove 211a under the guidance of the groove side wall so as to complete the pressing and locking of the liquid level cover 2; the first protrusion 211 may further have a first guiding surface 211c, the second guiding portion may be opposite to the groove bottom of the locking groove 211a, when the liquid outlet cover 2 is pressed, the locking block 121 may axially separate from the groove bottom of the locking groove 211a and slide to the second guiding portion, under the action of the second guiding portion, the locking block 121 may slide to be opposite to the first guiding surface 211c, at this time, the pressing is released, the locking block 121 may slide to the first guiding surface 211c and slide into the in-out gap 211b under the action of the first guiding surface 211c, and then the locking block 121 may separate from the latch bolt 21 along the in-out gap 211b to complete the pressing unlocking.

In a first scheme, as shown in fig. 4 and 5, the second protrusion 212 may include a plurality of slot-aligning protrusions 212a disposed at intervals in the circumferential direction, the slot-aligning protrusion 212a refers to a protrusion opposite to the access slot 211b, a slot-aligning protrusion 212b may be disposed between two adjacent pairs of slot-aligning protrusions 212a, the slot-aligning protrusion 212b refers to a protrusion opposite to the slot bottom of the locking slot 211a, and the slot-aligning protrusion 212a and the slot-aligning protrusion 212b may each have a second guide surface 212c inclined in the same direction, and in the scheme of fig. 5, the second guide surfaces 212c are both inclined downward from right to left.

Of the circumferential gaps between the pair of protrusion 212a and the adjacent pair of protrusion 212b, the locking guide gap 212d is opposite to one groove sidewall of the locking groove 211a, and the unlocking guide gap 212e is opposite to the first guide surface 211c, the second guide surface 212c of the pair of protrusion 212a and the adjacent locking guide gap 212d may be combined to form a first guide portion, and the second guide surface 212c of the pair of protrusion 212b and the adjacent unlocking guide gap 212e may be combined to form a second guide portion.

Specifically, in conjunction with the operation trace in fig. 5, when locking, by pressing the hydraulic port cover 2, the lock block 121 can slide in from the access slot 211b and first slide to the second guide surface 212c of the slot protrusion 212a, and under the action of the second guide surface 212c, the lock block 121 can slide in the locking guide slot 212d, and at this time, the pressing force is released, and the lock block 121 can slide to the slot side wall opposite to the locking guide slot 212d and slide to the slot bottom of the lock slot 211a under the guidance of the slot side wall, so as to complete the locking; when unlocking, the lock block 121 can be separated from the groove bottom of the lock groove 211a and slide to the second guide surface 212c of the groove protrusion 212b by pressing the hydraulic port cover 2, the lock block 121 can slide into the unlocking guide gap 212e under the action of the second guide surface 212c, at this time, the pressing force is released, and the lock block 121 can slide to the first guide surface 211c opposite to the unlocking guide gap 212e, slide to the in-out gap 211b under the action of the first guide surface 211c, and gradually separate from the lock tongue 21, thereby completing unlocking.

In the second solution, as shown in fig. 6, compared with the first solution, the second protrusion 212 in the present solution is an integrated structure, and the end surface opposite to the first protrusion 211 is provided with a plurality of the aforementioned first guiding portions and second guiding portions, so as to complete the press locking and the press unlocking through the guidance of the first guiding portions and the second guiding portions. The principle of the present solution is similar to that of the first solution, and will not be described repeatedly here.

In comparison, both the above two schemes can realize the press unlocking and press locking of the liquid port cover 2 and the liquid port seat 1, and in the specific implementation, a person skilled in the art can select the two schemes according to the actual needs.

In addition, in order to ensure that the above-mentioned push-to-unlock and push-to-lock can be achieved, the liquid lid 2 also needs to have an opening and closing force in the opening direction when being locked or to be locked, which opening and closing force can be provided manually, or, the opening and closing force can also be provided by an actuating member, which can be an elastic member, such as a torsion spring, which can be sleeved around a hinge shaft of the liquid port cover 2, one extending end of the connecting rod can be fixed (or propped against the fixed part), the other extending end can be propped against the liquid port cover 2, when the liquid opening cover 2 is covered on the liquid opening seat 1, the torsion spring can be in a deformation state to gather the elastic force, this elastic force may force the locking piece 121 to be caught in the locking groove 211a to maintain the locked state, when the unblock, the elastic force of torsional spring can release to order about liquid flap 2 automatic upset to open, and then can improve the degree of automation of equipment.

Referring to fig. 7-10, fig. 7 is a side view of the pouring spout, fig. 8 is a structure view of the reinforcing lock mechanism and the latch bolt, fig. 9 is a connection structure view of the lock beam, the positioning guide and the driving plate, and fig. 10 is a top view of fig. 9.

The reinforcing lock mechanism 13 may further include a driving member 132, and the driving member 132 may be drivingly connected to the arc 131 to drive the arc 131.

Specifically, as shown in fig. 7-10, the driving member 132 may be a motor, the motor may drive the driving disc 133 to rotate, and the disc surface of the driving disc 133 may be provided with a path groove 133 a; the locking mechanism can further comprise a positioning guide 134, the lock beam 131 can be slidably connected with the positioning guide 134, one end of the lock beam 131 can be provided with a fixture block 131a, the fixture block 131a can be inserted into the path groove 133a, and when the motor rotates, the groove side wall of the path groove 133a can act on the fixture block 131a to drive the lock beam 131 to extend or retract, so that unlocking or locking of the lock beam 131 and the lock tongue 21 is completed.

The rotating shaft of the motor can be directly connected with the transmission disc 133, or the motor and the transmission disc 133 can be in transmission connection through transmission pieces in the forms of gears, belt wheels, chain wheels and the like. In the solution of the drawings, a gear may be connected to the rotating shaft of the motor, and the transmission disc 133 may be provided with inner gear rings 133b (or outer teeth), and the gear may be engaged with the inner gear rings 133b (or outer teeth) to drive the transmission disc 133 to rotate.

In the above-described embodiment, the operation of the lock beam 131 is performed by the motor driving the transmission disc 133 and the engagement of the lock beam 131 with the path groove 133a of the transmission disc 133, and in addition, the lock beam 131 may be actuated by the engagement of the motor with a mechanism capable of generating linear displacement, such as a rack and pinion mechanism or a screw mechanism. The motor can be fixed with the liquid port seat 1 through connecting pieces in the forms of bolts, screws and the like, and can also be fixed through a bracket and the like; the motor can be driven by a control switch, and an electric control key and the like can be configured to operate the motor.

Referring to fig. 1 again, the end of the liquid inlet seat 1 facing the liquid inlet cover 2 may further be provided with a slot 14, the liquid feeding channel 11 may be connected to the bottom of the slot 14, and an illuminating lamp 15 may be disposed in the slot 14, so that a user can observe the liquid level in the liquid containing box, and especially when filling liquid at night, the overflow caused by excessive feeding amount can be avoided to a greater extent.

And/or, can also be equipped with level sensor (not shown in the figure) and alarm (not shown in the figure), level sensor can install in liquid outlet seat 1 for detect the liquid level in the liquid container box, and the alarm can be buzzer siren, audible-visual annunciator etc. it can with level sensor signal connection, when annotating the liquid, if the liquid level in the liquid container box has reached the settlement standard, the alarm can report to the police, need not to add liquid again with the warning user. And the liquid level sensor can also give an early warning when the liquid level is low so as to remind a user of adding liquid.

The power supply circuit of light 15 can be equipped with the on-off switch, and when liquid flap 2 was in the locking state, the on-off switch can break off to avoid the waste of electric quantity, when liquid flap 2 was in the open mode, the on-off switch can be closed, with the automation of realizing light 15 is opened, can avoid the situation of can't finding the switch when using night. The on-off switch may be a push switch (travel switch) or a magnetic switch, for example, a magnet 22 may be disposed on the liquid outlet cover 2, and in the locked state, the magnet 22 may contact with the on-off switch to disconnect the on-off switch, and in the unlocked state, the magnet 22 may be separated from the on-off switch to close the on-off switch. Of course, the illumination lamp 15 may be manually controlled.

The liquid port holder 1 may further include a vent hole 16 for communicating the inside and outside of the liquid containing tank, thereby ensuring the balance of atmospheric pressure inside and outside the liquid containing tank.

The liquid outlet seat 1 may further be provided therein with a control component in the form of a circuit board, etc., which is in signal connection with the aforementioned motor, liquid level sensor, etc. for controlling the operation of each element. The control unit and the illumination lamp 15 and other components requiring liquid-proof protection can be protected against liquid, and for example, they can be sealed with glue.

Further, can also include stopper 17 for shutoff liquid feeding passageway 11, stopper 17 can be the rubber buffer, or can adopt rubber material with liquid feeding passageway 11 matched with part at least to guarantee the reliability to the shutoff of liquid feeding passageway 11. One side of liquid level lid 2 towards liquid level seat 1 can be equipped with portion 23 of laying, and this portion 23 of laying can include a plurality of trips, and stopper 17 under the state of extracting can be placed on portion 23 of laying to the person of facilitating the use carries out the liquid feeding operation, simultaneously, also can avoid stopper 17 to put in disorder and lead to stopper 17 to be stained.

It should be emphasized, although the utility model discloses a design original intention is to solve the structure problem of car as a house water tank notes liquid mouth, nevertheless obviously, this design of annotating the liquid mouth is not restricted to the application of car as a house water tank, can also be used as the oil filler hole etc. of oil tank, that is to say, the application field can not in fact be as the restriction to the utility model provides a annotate the implementation scope of liquid mouth.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The liquid filling port is characterized by comprising a liquid port seat (1) and a liquid port cover (2), wherein the liquid port seat (1) is provided with a liquid filling channel (11), and the liquid port cover (2) is rotatably connected to the liquid port seat (1);

one of the liquid port cover (2) and the liquid port seat (1) is provided with a lock tongue (21), the other is provided with a locking piece (12), the outer wall of the lock tongue (21) is provided with a lock groove (211a), and the locking piece (12) can slide into or out of the lock groove (211a) by pressing the liquid port cover (2) so as to unlock or lock the liquid port cover (2);

still including strengthening latch mechanism (13), strengthen latch mechanism (13) including lock beam (131), the outer wall of spring bolt (21) is equipped with locking cooperation portion (211d) of cell type or pass, lock beam (131) peg graft in during locking cooperation portion (211d), liquid flap (2) lock is dead.

2. The pour spout according to claim 1, characterized in that said reinforcing lock mechanism (13) further comprises a driving member (132), said driving member (132) is drivingly connected to said lock beam (131) and can actuate said lock beam (131).

3. The pouring spout according to claim 2, characterized in that the driving member (132) is a motor, the motor can drive a transmission disc (133) to rotate, and the disc surface of the transmission disc (133) is provided with a path groove (133 a);

the lock comprises a lock beam (131), and is characterized by further comprising a positioning guide piece (134), wherein the lock beam (131) is in sliding connection with the positioning guide piece (134), one end of the lock beam (131) is provided with a fixture block (131a), the fixture block (131a) is inserted into the path groove (133a), and when the motor rotates, the groove side wall of the path groove (133a) can act with the fixture block (131a) to drive the lock beam (131) to extend or retract.

4. The pouring spout according to claim 3, characterized in that a gear is connected to the rotating shaft of the motor, and the transmission disc (133) is provided with an inner gear ring (133b), and the gear can be engaged with the inner gear ring (133 b).

5. Pouring spout according to any of claims 1 to 4, characterized in that the locking tongue (21) comprises a first tongue and a second tongue, which is adjacent to the mounting part of the locking tongue (21) opposite the first tongue;

the outer wall of the first tongue portion is provided with a plurality of first protruding blocks (211) arranged at intervals along the circumferential direction, each first protruding block (211) is provided with a locking groove (211a), the outer wall of the second tongue portion is provided with a second protruding block (212), each second protruding block (212) is provided with a plurality of first guide portions and a plurality of second guide portions, each first guide portion is opposite to an access gap (211b) between every two adjacent first protruding blocks (211) and one groove side wall of each locking groove (211a), and the first guide portions can guide locking pieces (12) in the access gap (211b) to the locking grooves (211 a);

the first protruding block (211) is further provided with a first guide surface (211c), the second guide portion is opposite to the groove bottom of the locking groove (211a) and can guide the locking piece (12) in the locking groove (211a) to be opposite to the first guide surface (211c), and the first guide surface (211c) can guide the locking piece (12) to the access gap (211 b).

6. The pouring spout according to claim 5, characterized in that the second protrusion (212) comprises a plurality of slit-shaped protrusions (212a) spaced apart from each other in the circumferential direction, a slit-shaped protrusion (212b) is disposed between two adjacent slit-shaped protrusions (212a), and the slit-shaped protrusions (212a) and the slit-shaped protrusions (212b) are both provided with second guide surfaces (212c) inclined in the same direction;

in the circumferential gap of the slot aligning convex piece (212a) and the adjacent slot aligning convex piece (212b), a locking guide gap (212d) is opposite to one side wall of the locking slot (211a), an unlocking guide gap (212e) is opposite to the first guide surface (211c), the second guide surface (212c) of the slot aligning convex piece (212a) and the adjacent locking guide gap (212d) are combined to form the first guide part, and the second guide surface (212c) of the slot aligning convex piece (212b) and the adjacent unlocking guide gap (212e) are combined to form the second guide part.

7. The pour spout according to any one of claims 1 to 4, characterized in that the end of the pour spout base (1) facing the pour spout cover (2) is provided with a slot (14), the filling channel (11) is connected with the bottom of the slot (14), and an illuminating lamp (15) is arranged in the slot (14); and/or the presence of a gas in the gas,

still include level sensor and alarm, level sensor install in liquid mouth seat (1) for monitor liquid level, level sensor with alarm signal connection.

8. The liquid filling port according to claim 7, characterized in that a power supply circuit of the illuminating lamp (15) is provided with an on-off switch, when the liquid level cover (2) is in a locked state, the on-off switch is turned off, and when the liquid level cover (2) is in an opened state, the on-off switch is turned on; and/or the presence of a gas in the gas,

further comprises a vent hole (16) for communicating the inside and outside of the liquid containing tank.

9. Pouring spout according to any of claims 1 to 4, further comprising a plug (17) for closing off the filling channel (11), wherein the side of the pouring spout cover (2) facing the pouring spout base (1) is provided with a seat (23), and wherein the plug (17) in the extracted state can be placed on the seat (23).

10. The liquid filling port according to any one of claims 1 to 4, further comprising a torsion spring, one extending end of the torsion spring is fixed, the other extending end of the torsion spring is connected with the liquid level cover (2), and the locking process of the liquid level cover (2) is an increasing process of the deformation of the torsion spring.

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