CN212377338U - Water inlet connector and water heater using same - Google Patents

Abstract

The utility model relates to a water inlet joint and a water heater using the same, wherein the water inlet joint comprises a pipe body, a water inlet, a water outlet and an axial flow passage, and the side wall of the pipe body is provided with a side pipe and a mounting hole arranged on the pipe wall of the side pipe; the piston can be pushed by ice to move in a direction away from the flow channel; one end of the piston rod is connected with the piston, and the other end of the piston rod is provided with a baffle plate; the first elastic piece enables the piston to have a tendency of moving towards the direction of the flow passage; the blocking pin can move towards the direction far away from the side pipe under the action of the piston; the second elastic piece enables the blocking pin to partially extend into the side pipe to be in contact with the piston so as to block the tendency that the piston moves towards the flow passage; a valve core; a positioning assembly; and the third elastic part is compressed when the baffle plate moves along with the piston towards the direction far away from the flow channel, so that the valve core has the tendency of moving towards the first position, and large-area water leakage caused by expansion crack of the pipeline is prevented when the pipeline is frozen and the temperature is warmed.

Description

Water inlet connector and water heater using same

Technical Field

The utility model belongs to the technical field of the water heater, concretely relates to water supply connector and applied this water supply connector's water heater.

Background

The gas water heater is communicated with the outdoor environment through the smoke exhaust pipe, and cold air easily enters the water heater along the smoke exhaust pipe to cause frost cracking of a water pipeline of the water heater when the outdoor temperature is lower than zero degrees centigrade in cold winter, so that the gas water heater arranged in the north is additionally provided with the electric heating frost cracking prevention device, and a certain frost protection function is achieved. The electric heating anti-frost-crack device can be normally started to work only when the water heater is in a power-on state, and the electric heating device cannot be started and the pipeline of the water heater is frost-cracked due to the fact that some users have the habit of unplugging the power plug of the water heater after the water heater is used up, or have power failure at home, or a newly-decorated house does not use power failure for a long time and the like. The water channel of the water heater is usually a normally open valve at the water inlet end and a normally closed valve at the water outlet end, so that if a user does not find that the water inlet valve is closed in time, the whole machine leaks water, and property loss and safety problems such as water soaking on the floor, electric leakage and the like are caused.

In order to solve the problems, the invention discloses a water flow sensor and a gas water heater in the Chinese invention patent application with the patent number of CN 201910715564.6 (with the publication number of CN 110332965A), which comprises a water flow sensor and a gas water heater, wherein the water flow sensor comprises a shell, and a Hall flow meter component is arranged on the shell; the shell is provided with a pressure relief channel, the pressure relief channel is provided with a left section and a right section, a piston is arranged in the pressure relief channel and is arranged between the left section and the right section, the left section is communicated with an inner cavity of the shell, and an elastic component is arranged in the right section; the right side of the right section is provided with an end cover, the end cover is detachably connected with the shell, and the end cover is provided with a ventilation opening. When water in the water channel of the gas water heater freezes and expands outwards, the ice blocks can be extruded towards the piston due to the fact that the freezing process is a slow process, the extruded piston moves rightwards, air in the right section is discharged into external air through the ventilation port, enough space is released for the expanded ice blocks, and therefore the shell is prevented from being frozen or the Hall flow meter assembly is prevented from being damaged, and the protection effect can be achieved under the condition that the water heater is powered off.

However, after the pipeline is frozen, if the water source is only decompressed and not cut off in time, the water source continuously enters the pipeline, the freezing condition in the pipeline is more and more serious, the pipeline is cracked, the water source still enters the shell after the pipeline is cracked, once the ice in the temperature-return pipeline is melted, the water is not only melted, but also the water continuously flows into the pipeline, the water leakage degree is aggravated, and finally the large-area water leakage is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the first technical problem to provide a current situation to prior art, provide one kind in the pipeline freeze and can self-closing inlet channel and prevent the water supply connector that leaks by a large scale after the temperature warms up.

The utility model aims to solve the second technical problem to provide a water heater of the above-mentioned water supply connector of application that can self-closing inlet channel and prevent large tracts of land from leaking after freezing and temperature back-warming in the pipeline to the current situation of prior art.

For solving the first technical problem, the utility model discloses the technical scheme who adopts is: a water inlet joint is characterized in that: comprises that

The side wall of the pipe body is provided with a radial side pipe communicated with the flow channel and a mounting hole which is arranged on the pipe wall of the side pipe and communicated with the side pipe;

the piston is arranged in the side pipe in an axially movable manner and can be pushed by ice to move towards a direction far away from the flow channel;

the piston rod extends along the radial direction of the flow channel, one end of the piston rod is connected with the piston, and the other end of the piston rod is provided with a baffle;

the first elastic piece is arranged in the side pipe and acts on the piston to enable the piston to have a tendency of moving towards the direction of the flow passage;

the blocking pin can be axially movably arranged in the mounting hole and can move towards the direction far away from the side pipe under the abutting action of the piston;

the second elastic piece is arranged in the mounting hole and acts on the stop pin, so that the stop pin has the tendency that the part of the stop pin extends into the side pipe to be contacted with the piston so as to stop the piston from moving towards the flow channel;

the valve core can be positioned at a first position for blocking the communication between the water inlet and the water outlet and at a second position for keeping the communication between the water inlet and the water outlet, and can move between the first position and the second position;

the positioning assembly is linked with the piston, can position the valve core to enable the valve core to be at the second position, and can release the positioning of the valve core under the condition that the piston is blocked by the blocking pin;

and the third elastic element acts on the valve core and is connected with the piston rod, and the baffle is compressed when moving along with the piston towards the direction away from the flow passage, so that the valve core has the tendency of moving towards the first position.

In order to facilitate the arrangement of the valve core, the third elastic element and the baffle plate and enable the components to be well matched, a chamber which blocks a flow channel and is provided with a chamber is arranged in the pipe body, the chamber is a first chamber, the valve core is a first valve core, the second through hole is a second through hole, a first through hole which is in fluid communication with the water inlet and a second through hole which is in fluid communication with the water outlet are arranged on the side wall of the first chamber, the first chamber is arranged corresponding to the side pipe, the first valve core and the baffle plate are sequentially arranged in the first chamber along the direction far away from the side pipe, the third elastic element is a spring and is sleeved on the piston rod, and two ends of the third elastic element are respectively abutted against the baffle plate and the first valve core, so that the first valve core has the tendency of plugging the first through hole and/or the second through.

In order to enable the first valve core to be switched between a first position and a second position, the first chamber of the first compartment is in a cylindrical shape which is basically vertical to the axis of the flow passage, and the first through hole and the second through hole are oppositely arranged and are positioned on the peripheral wall of the first compartment;

the first valve core comprises a valve core body and a valve core body, wherein the valve core body is sequentially arranged along the direction of keeping away from the side pipe

The rotating drum can be rotatably arranged in the first cavity around the axis of the rotating drum and axially extends along the first cavity, two opposite water passing holes which can respectively correspond to the first through hole and the second through hole when the rotating drum rotates are formed in the peripheral wall of the rotating drum, the first end of the rotating drum, far away from the side pipe, is in a sawtooth shape, each sawtooth comprises an axial straight section and a first inclined section which forms an included angle with the axial direction, and the second end of the rotating drum is abutted against the side wall of the first compartment, facing the side pipe;

the movable ring can be axially movably arranged in the first cavity, a limiting structure for limiting the rotation of the movable ring is arranged between the movable ring and the inner wall of the first compartment, the first end of the movable ring is abutted against the third elastic part, and the second end of the movable ring faces the rotary drum and is in a sawtooth shape matched with the first end face of the rotary drum so as to force the rotary drum to rotate. When the piston moves in the direction far away from the flow passage, the baffle moves along with the piston and compresses the third elastic piece, the movable ring also has the tendency of moving towards the side pipe direction under the action of the third elastic piece, but due to the clamping and the contact of the second end of the movable ring and the first end of the rotary drum and the saw-toothed matching of the two, under the state that the positioning component releases the limitation on the rotary drum, the movable ring can force the rotary drum to rotate when being contacted with the rotary drum.

The positioning assembly can have various structural forms, the structure is simple, the positioning assembly is a positioning needle connected with the position, located on the outer side of the first chamber, of the piston rod, the positioning needle extends along the axial direction of the rotary drum, a first through hole for the positioning needle to movably penetrate through is formed in the side wall, facing the side pipe, of the first compartment, and the second end of the rotary drum is a closed end and is provided with a slot which is used for the positioning needle to detachably insert into the rotary drum after the end portion of the positioning needle penetrates through the first through hole. And under the condition that the positioning needle is inserted in the slot, the first valve core is limited by the positioning needle and cannot rotate.

The limiting structure can have various structural forms, and preferably, a guide block is arranged on one of the outer peripheral wall of the movable ring and the inner peripheral wall of the first compartment, a guide groove capable of allowing the guide block to slide in the guide groove is arranged on the other one of the outer peripheral wall of the movable ring and the inner peripheral wall of the first compartment, the guide groove extends along the axial direction of the first compartment, and the guide groove and the guide block form the limiting structure. The limiting structure is simple in structure and easy to process and manufacture.

In order to enable the valve core to be switched between the first position and the second position, the compartment is a second compartment, the chamber is a second chamber, the valve core is a second valve core, the second chamber is at least partially cylindrical, the axis of the second chamber is basically vertical to the axis of the flow passage, the second valve core is axially movably arranged on the cylindrical part of the second chamber, and the second through hole is arranged on the side wall of the second compartment facing the side pipe and faces the second valve core. The second valve core can axially move towards the second through hole to block the second through hole and block the communication between the water inlet and the water outlet; the second valve core can also move axially in the direction away from the second through hole, and the circulation between the water inlet and the water outlet is kept.

In order to guide the moving track of the baffle, the second valve core is in a cylindrical shape with an opening at one end, the piston rod sequentially penetrates through the side wall of the second compartment and the second valve core, the baffle can be axially and movably arranged in the second valve core, and the second valve core plays a role in guiding and limiting the baffle, so that the baffle is prevented from deviating from the preset track and compressing the third elastic element well.

In order to enable the baffle plate to drive the positioning assembly to move when moving and enable the positioning assembly to release the positioning of the second valve core, a branch pipe which is opposite to the side pipe and communicated with the flow channel is arranged on the pipe body, the branch pipe serves as a part of the second compartment, an accommodating cavity communicated with the second cavity of the second compartment is formed in the pipe wall of the branch pipe, the positioning assembly comprises a positioning pin and a fourth elastic piece which are arranged in the accommodating cavity, a second through hole is formed in the side wall of the second valve core, the positioning pin always has the tendency that at least part of the positioning pin penetrates through the second through hole and is located in the second valve core under the action of the fourth elastic piece, the positioning pin can abut against the baffle plate, and the end face, abutted against the baffle plate, of the positioning pin is an inclined plane which inclines towards the direction of the flow channel from.

In order to enable the blocking pin to be pressed by the piston to move towards the direction far away from the side pipe, the blocking pin partially extends into the side pipe and can abut against the end face, facing the flow channel, of the piston, and the end face, close to one end of the side pipe, of the blocking pin is an inclined face inclining towards the direction far away from the flow channel from the water inlet to the water outlet, and the inclined face is arranged to avoid the blocking pin from interfering with the piston, so that the piston cannot move towards the direction far away from the flow channel; and the stop pin can abut against the end face of the piston facing the flow channel to stop the piston from moving towards the flow channel.

For solving the second technical problem, the utility model discloses the technical scheme who adopts is: the water heater applying the water inlet joint is characterized in that: the water inlet connector is characterized by further comprising a water heater body, and a water outlet of the water inlet connector is connected with a water inlet end of the water heater body.

Compared with the prior art, the utility model has the advantages that: the water inlet joint of the utility model can prevent the freezing in the pipeline and the water leakage of large area caused by the expansion crack of the pipeline when the temperature is warmed up, concretely, under the normal condition, the positioning component positions the valve core to ensure that the valve core is positioned at the second position for keeping the circulation of the flow channel, when the pipeline is frozen, the expansion force of the ice during freezing can push the piston to move towards the direction far away from the flow channel, the positioning component is linked with the piston to remove the positioning of the valve core, and the third elastic part is compressed by the baffle plate, but the valve core can not move and still be positioned at the second position because of being limited by the ice in the pipeline, when the temperature is warmed up, the blocking pin moves to block the piston to ensure that the piston can not move towards the flow channel direction, so the positioning component is still in the state of removing the positioning of the valve core, the valve core is melted because of the ice, so the valve core can move to the first position under the action of the, namely, the water inlet channel is closed, so that even if the pipeline is burst after the temperature is warmed up, only the existing ice in the pipeline causes small-area water leakage, and large-area water leakage cannot be caused because continuous water cannot enter the flow channel.

Drawings

Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic view of a portion of the structure of FIG. 2;

FIG. 4 is a schematic structural view of the drum of FIG. 3;

FIG. 5 is a schematic structural view of the movable ring in FIG. 3;

FIG. 6 is a schematic structural view of the movable ring of FIG. 2;

FIG. 7 is a cross-sectional view of FIG. 1 (initial state, flow between water inlet and water outlet);

FIG. 8 is a schematic diagram of the third elastic member, the valve core, the positioning pin and the piston in FIG. 7;

FIG. 9 is a cross-sectional view of FIG. 1 (ice is formed in the tube and the piston is moved by the ice);

FIG. 10 is a cross-sectional view of FIG. 1 (warm-up temperature, with the cartridge blocked between the water inlet and outlet);

FIG. 11 is a schematic diagram of the third elastic member, the valve core, the positioning pin and the piston in FIG. 10;

FIG. 12 is a schematic view of a water heater employing the water inlet fitting of FIG. 1;

fig. 13 is a cross-sectional view of embodiment 2 of the present invention (initial state, flow between the water inlet and the water outlet);

fig. 14 is a cross-sectional view of embodiment 2 of the present invention (ice is formed in the tube, and the piston is moved by the ice);

fig. 15 is a cross-sectional view of embodiment 2 of the present invention (temperature back-warming, valve core blocking between water inlet and water outlet).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

Example 1

As shown in fig. 1 to 12, the gas water heater of the preferred embodiment includes a water heater body B and a water inlet connector a, the water inlet connector a includes a pipe body 1, two ends of the pipe body 1 are open and respectively provided with a water inlet 11 and a water outlet 12, the pipe body 1 is provided with an axial flow channel 13 communicating the water inlet 11 and the water outlet 12, the water inlet 11 of the pipe body 1 is connected with a living water pipe (i.e., a water source), the water outlet 12 of the pipe body 1 is connected with a water inlet end of the water heater body B, and a filter screen is arranged at the water.

As shown in fig. 7 to 11, the water inlet joint further includes a piston 2, a piston rod 21, a first elastic member 20, a blocking pin 3, a second elastic member 31, a valve core, a positioning assembly and a third elastic member 40, where the valve core is a first valve core 4a, and a radial side pipe 14 communicated with the flow passage 13 and a mounting hole 15 provided on a pipe wall of the side pipe 14 and communicated with the side pipe 14 are further provided on a side wall of the pipe body 1. The piston 2 is arranged in the side pipe 14 in an axially movable manner and can be pushed by ice to move in a direction away from the flow channel 13; the piston rod 21 extends along the radial direction of the flow passage 13, one end of the piston rod is connected with the piston 2, and the other end of the piston rod is provided with a baffle 22; the first elastic member 20 is arranged in the side pipe 14 and acts on the piston 2 to make the piston 2 tend to move towards the flow passage 13; the blocking pin 3 is axially movably arranged in the mounting hole 15, and the blocking pin 3 is pressed by the piston 2 to move towards the direction far away from the side pipe 14 under the condition that the piston 2 moves towards the direction far away from the flow passage 13; the second elastic member 31 is disposed in the mounting hole 15 and acts on the blocking pin 3, so that the blocking pin 3 has a tendency to partially extend into the side tube 14 to contact the piston 2, thereby blocking the piston 2 from moving toward the flow passage 13; the first spool 4a is movable between a first position blocking communication between the inlet port 11 and the outlet port 12 and a second position maintaining communication between the inlet port 11 and the outlet port 12; the positioning component is linked with the piston 2, can position the first valve core 4a to enable the first valve core 4a to be at the second position, and can release the positioning of the first valve core 4a under the state that the piston 2 is blocked by the blocking pin 3; the third elastic member 40 acts on the first valve element 4a and is connected to the piston rod 21, and the third elastic member 40 is compressed when the flapper 22 moves away from the flow passage 13 with the piston 2, so that the first valve element 4a has a tendency to move toward the first position.

In this embodiment, the end of the side tube 14 far from the flow channel 13 is detachably covered with a cover plate 11b, and the first elastic member 20 is a spring and both ends of the spring abut against the piston 2 and the cover plate 11b, respectively, so that the piston 2 and the first elastic member 20 can be placed in the side tube 14 conveniently. The notch of the side tube 14 near the flow channel 13 is formed with a resisting part 12b extending toward the center of the side tube 14 to be capable of resisting against the piston 2.

A plug 33 is detachably arranged at the mounting hole 15, and the second elastic member 31 is a spring and has two ends respectively abutting against the plug 33 and the stop pin 3. In this embodiment, the mounting hole 15 is partially a threaded hole, and the plug 33 is a screw capable of being screwed into the mounting hole 15.

The end surface 32 of the blocking pin 3 close to one end of the side pipe 14 is an inclined surface which is inclined towards the direction far away from the flow channel 13 from the direction from the water inlet 11 to the water outlet 12, and the arrangement of the inclined surface avoids the blocking pin 3 from interfering the piston 2, so that the piston 2 cannot move towards the direction far away from the flow channel 13; and the stop pin 3 can be abutted against the end face of the piston 2 facing the flow passage 13 to stop the piston 2 from moving towards the flow passage 13.

The pipe body 1 is provided with a chamber compartment for blocking the flow passage 13, the chamber compartment is a first compartment 5a, the chamber compartment is a first chamber 51a, the first chamber 51a of the first compartment 5a is cylindrical and substantially perpendicular to the axis of the flow passage 13, a first through hole 52a in fluid communication with the water inlet 11 and a second through hole in fluid communication with the water outlet 12 are formed in the side wall of the first compartment 5a, in this embodiment, the second through hole is a second through hole 53a, and the first through hole 52a and the second through hole 53a are arranged oppositely.

The first compartment 5a is disposed corresponding to the side tube 14, the first valve core 4a includes a rotating cylinder 41 and a movable ring 42, the rotating cylinder 41, the movable ring 42 and the baffle 22 are sequentially disposed in the first chamber 51a along a direction away from the side tube 14, the piston rod 21 sequentially passes through the first compartment 5a, the rotating cylinder 41 and the movable ring 42 to be connected with the baffle 22, the third elastic member 40 is a spring and is sleeved on the piston rod 21, and two ends of the third elastic member respectively abut against the baffle 22 and the first valve core 4 a.

As shown in fig. 4, 5, 8, and 11, the rotating cylinder 41 is rotatably disposed in the first chamber 51a around its axis and extends along the axial direction of the first chamber 51a, two opposite water passing holes 411 are opened on the peripheral wall of the rotating cylinder 41, which correspond to the first through hole 52a and the second through hole 53a respectively when the rotating cylinder rotates, a first end of the rotating cylinder 41 away from the side tube 14 is in a saw-tooth shape, each saw-tooth shape includes an axial straight section 412 and a first inclined section 413 forming an angle with the axial direction, and a second end of the rotating cylinder 41 abuts against the side wall of the first compartment 5a facing the side tube 14.

As shown in fig. 5 and 6, the movable ring 42 is axially movably disposed in the first chamber 51a, a limit structure for limiting the rotation of the movable ring 42 is disposed between the movable ring 42 and the inner wall of the first compartment 5a, a guide block 421 is disposed on the outer peripheral wall of the movable ring 42, a guide groove 55a for allowing the guide block 421 to slide therein is disposed on the inner peripheral wall of the first compartment 5a, the guide groove 55a extends axially along the first compartment 5a, and the guide groove 55a and the guide block 421 constitute the limit structure for limiting the rotation of the movable ring 42 relative to the first chamber 51 a. Of course, it is also possible to provide the guide block 421 on the first compartment 5a and the guide groove 55a on the movable ring 42.

The first end of the movable ring 42 abuts against the third elastic member 40, the second end faces the rotating cylinder 41 and is in a sawtooth shape adapted to the first end surface of the rotating cylinder 41 to force the rotating cylinder 41 to rotate, each sawtooth shape of the second end of the movable ring 42 also comprises an axial second straight section 422 and a second inclined section 423 forming an angle with the axial direction, the first inclined section 413 and the second inclined section 423 are in inclined plane fit to rotate the rotating cylinder 41, and the principle that the movable ring 42 forces the rotating cylinder 41 to rotate is similar to that of a ball-point pen.

When the piston 2 moves away from the flow path 13, the baffle plate 22 moves along with the piston and compresses the third elastic member 40, the movable ring 42 also has a tendency to move toward the side pipe 14 by the third elastic member 40, but due to the engagement of the second end of the movable ring 42 and the first end of the drum 41 and the saw-toothed engagement therebetween, in a state where the positioning member releases the restriction on the drum 41, the movable ring 42 is forced to rotate by the third elastic member 40 when abutting against the drum 41.

In this embodiment, a connecting member 241 is radially formed at a position of the piston rod 21 located outside the first chamber 51a, the connecting member 241 is formed with a positioning needle 24 extending along the axial direction of the drum 41, the positioning needle 24 is a positioning component, a first through hole 54a for the positioning needle 24 to movably pass through is formed on a side wall of the first compartment 5a facing the side tube 14, and a second end of the drum 41 is a closed end and is formed with a slot 414 into which an end portion of the positioning needle 24 can be detachably inserted after passing through the first through hole 54 a. In a state where the pilot pin 24 is inserted into the insertion groove 414, the first valve element 4a is restricted from rotating by the pilot pin 24.

The working process of the water inlet joint of the embodiment is as follows:

as shown in fig. 7, under normal conditions, the piston 2 is located near the flow channel 13 under the action of the first elastic member 20, the piston rod 21 passes through the first compartment 5a, the baffle 22 is located in the first chamber 51a and does not compress the third elastic member 40, the movable ring 42 is not subjected to the elastic force of the third elastic member 40, the two water through holes 411 on the drum 41 are correspondingly communicated with the first through hole 52a and the second through hole 53a, respectively, the positioning pin 24 is inserted into the insertion slot 414 on the drum 41, and the flow channel 13 is in a flowing state;

as shown in fig. 9, when the pipeline is frozen, the expansion force of the frozen ice pushes the piston 2 to move away from the flow channel 13, the positioning needle 24 moves towards the side pipe 14 to release the positioning of the first valve core 4a, the baffle 22 moves towards the side pipe 14 to compress the third elastic element 40, the third elastic element 40 applies force on the movable ring 42, but at this time, the first valve core 4a cannot move because of being limited by the ice in the pipeline, so that the axial movement of the movable ring 42 is limited;

as shown in fig. 11, when the temperature is warmed up again, the blocking pin 3 moves towards the side tube 14 by the second elastic member 31, the blocking pin 3 is blocked against the end surface of the piston 2 towards the flow channel 13 so that the piston 2 cannot move towards the flow channel 13, so that the positioning needle 24 is still in a state of releasing the positioning of the first valve core 4a, at this time, because the ice in the pipeline melts, the movable ring 42 moves towards the side tube 14 by the third elastic member 40, during the moving process of the movable ring 42, the rotary tube 41 cannot be pushed by the movable ring 42 to move axially because the rotary tube 41 is abutted against the side wall of the first compartment 5a towards the side tube 14, but because the movable ring 42 is matched with the saw teeth on the rotary tube 41, the rotary tube 41 can rotate to stagger the water through hole 411 and the first through hole 52a and the second through hole 53a, so as to block the flow of the flow channel 13, that the water inlet channel is closed, so that after the temperature is warmed up again, even if the pipeline is burst, only the existing ice in the pipeline causes small-area water leakage, and large-area water leakage cannot be caused because continuous water cannot enter the flow channel 13.

Example 2

Example 2 differs from example 1 in that: the valve core and the positioning component have different structures. In this embodiment, the compartment is the second compartment 5b, the chamber is the second chamber 51b, and the spool is the second spool 4 b.

As shown in fig. 13 to 15, in the present embodiment, the branch pipe 17 is provided on the pipe body 1 opposite to the side pipe 14, the detachable cover is provided on the end of the branch pipe 17 away from the flow passage 13, the branch pipe 17 is cylindrical and is a part of the second chamber 51b, the axis of the branch pipe 17 is substantially perpendicular to the axis of the flow passage 13, the second valve element 4b is axially movably provided in the branch pipe 17, and the second through hole 53b is provided on the side wall of the second chamber 5b facing the side pipe 14 and faces the second valve element 4 b. The second valve body 4b has a cylindrical shape with one end open, the piston rod 21 passes through the side wall of the second compartment 5b and the second valve body 4b in this order, and the baffle plate 22 is provided in the second valve body 4b so as to be axially movable.

The side wall of the branch pipe 17 is provided with an accommodating cavity 16 communicated with the second chamber 51b of the second compartment 5b, a port of the accommodating cavity 16 far away from the second chamber 51b is in threaded connection with a blocking block 11c, the positioning assembly comprises a positioning pin 61 and a fourth elastic piece 62, the positioning pin is arranged in the accommodating cavity 16, the side wall of the second valve core 4b is provided with a second through hole 41b, the positioning pin 61 always has a tendency that at least part of the positioning pin passes through the second through hole 41b and is located in the second valve core 4b under the action of the fourth elastic piece 62, the positioning pin 61 can be pressed by the baffle plate 22 to move towards the direction of the accommodating cavity 16, and the end face, which can be abutted against the baffle plate 22, of the positioning pin 61 is an inclined plane which inclines towards the direction of the flow channel. When the baffle 22 moves toward the side pipe 14, the positioning pin 61 is pressed to move toward the accommodating chamber 16 (downward in fig. 14), and when the second valve core 4b moves toward the branch pipe 17 under the action of the third elastic member 40, the end surface of the positioning pin 61 is inclined, so that the positioning pin 61 continues to move toward the accommodating chamber 16 until the positioning pin comes out of contact with the second valve core 4b, and at this time, the positioning pin 61 releases the positioning of the second valve core 4 b.

The fourth elastic member 62 is a spring, and both ends thereof respectively abut against the positioning pin 61 and the block 11 c.

The working process of the water inlet joint of the embodiment is as follows:

as shown in fig. 13, under normal conditions, the piston 2 is in a position close to the flow channel 13 under the action of the first elastic member 20, the piston rod 21 passes through the second compartment 5b, the baffle plate 22 is located in the second chamber 51b and does not compress the third elastic member 40, the positioning pin 61 extends into the second valve core 4b under the action of the fourth elastic member 62 to position the second valve core 4b, so that the second valve core 4b is in a second position far away from the second through hole 53b, and the flow channel 13 is in a flow state;

as shown in fig. 14, when ice is frozen in the pipeline, the expansion force of the ice during freezing pushes the piston 2 to move away from the flow channel 13, the baffle plate 22 moves towards the side pipe 14 and presses the positioning pin 61 to move downwards until the end of the positioning pin 61 is located in the second through hole 41b of the second valve core 4b, and the baffle plate 22 compresses the third elastic element 40 during moving, and the third elastic element 40 applies force on the second valve core 4b, but at this time, the second valve core 4b cannot move because of being limited by the ice in the pipeline;

as shown in fig. 15, when the temperature is warmed up, the blocking pin 3 moves towards the side tube 14 under the action of the second elastic element 31, the blocking pin 3 abuts against the end surface of the piston 2 towards the flow passage 13 so that the piston 2 cannot move towards the flow passage 13, at this time, because ice in the pipeline melts, the second valve core 4b moves towards the second through hole 53b under the action of the third elastic element 40, during the movement of the second valve core 4b, the positioning pin 61 is continuously pressed to move downwards until the second valve core 4b is separated from contact, at which time the positioning pin 61 releases the positioning of the second valve core 4b, the second through hole 53b is blocked by the second valve core 4b to block the flow of the flow passage 13, namely, the water inlet channel is closed, so that even if the pipeline is burst after the temperature is warmed up, only the existing ice in the pipeline causes small-area water leakage, and large-area water leakage cannot be caused because continuous water cannot enter the flow channel 13.

Claims (10)

1. A water inlet joint is characterized in that: comprises that

The water-saving device comprises a pipe body (1) and a water-saving device, wherein the pipe body (1) is provided with a water inlet (11), a water outlet (12) and an axial flow passage (13) for communicating the water inlet and the water outlet, and the side wall of the pipe body (1) is provided with a radial side pipe (14) communicated with the flow passage (13) and a mounting hole (15) which is arranged on the pipe wall of the side pipe (14) and communicated with the side pipe (14;

a piston (2) which is axially movably arranged in the side pipe (14) and can be pushed by ice to move towards a direction far away from the flow passage (13);

the piston rod (21) extends along the radial direction of the flow channel (13), one end of the piston rod is connected with the piston (2), and the other end of the piston rod is provided with a baffle plate (22);

a first elastic member (20) which is provided in the side tube (14) and acts on the piston (2) to cause the piston (2) to have a tendency to move toward the flow passage (13);

the blocking pin (3) is axially movably arranged in the mounting hole (15) and can move towards the direction far away from the side pipe (14) under the abutting action of the piston (2);

the second elastic piece (31) is arranged in the mounting hole (15) and acts on the blocking pin (3), so that the blocking pin (3) has the tendency that the part extends into the side pipe (14) to be contacted with the piston (2) so as to block the piston (2) from moving towards the flow passage (13);

a valve core which can be positioned at a first position for blocking the communication between the water inlet (11) and the water outlet (12) and a second position for keeping the communication between the water inlet (11) and the water outlet (12) and can move between the first position and the second position;

the positioning assembly is linked with the piston (2), can position the valve core to enable the valve core to be at a second position, and can release the positioning of the valve core under the state that the piston (2) is blocked by the blocking pin (3);

and the third elastic element (40) acts on the valve core and is connected with the piston rod (21), and when the baffle (22) moves along with the piston (2) towards the direction far away from the flow passage (13), the baffle is compressed, so that the valve core has the tendency of moving towards the first position.

2. The water inlet joint of claim 1, wherein: the novel water-saving valve is characterized in that a compartment with a cavity and used for blocking a flow channel (13) is arranged in the pipe body (1), a first through hole (52a,52b) communicated with a water inlet (11) in a fluid mode and a second through hole communicated with a water outlet (12) in a fluid mode are formed in the side wall of the compartment, the compartment is arranged corresponding to a side pipe (14), the valve core and the baffle (22) are sequentially arranged in the cavity along the direction far away from the side pipe (14), the third elastic piece (40) is a spring and sleeved on the piston rod (21), and two ends of the third elastic piece respectively abut against the baffle (22) and the valve core, so that the valve core has the tendency of blocking the first through hole (52a,52b) and/or the second through hole.

3. The water inlet joint of claim 2, wherein: the compartment is a first compartment (5a), the compartment is a first chamber (51a), the valve core is a first valve core (4a), the second through hole is a second through hole (53a), the first chamber (51a) of the first compartment (5a) is in a cylindrical shape which is basically vertical to the axis of the flow passage (13), and the first through hole (52a) and the second through hole (53a) are oppositely arranged and are positioned on the peripheral wall of the first compartment (5 a);

the first valve core (4a) comprises a valve core and a valve core, wherein the valve core and the valve core are sequentially arranged along the direction far away from the side pipe (14)

The rotary drum (41) is rotatably arranged in the first chamber (51a) around the axis of the rotary drum and axially extends along the first chamber (51a), two opposite water passing holes (411) which can respectively correspond to the first through hole (52a) and the second through hole (53a) when the rotary drum (41) rotates are formed in the peripheral wall of the rotary drum (41), a first end, far away from the side pipe (14), of the rotary drum (41) is in a sawtooth shape, each sawtooth comprises an axial straight section (412) and a first inclined section (413) forming an included angle with the axial direction, and a second end of the rotary drum (41) is abutted against the side wall, facing the side pipe (14), of the first compartment (5 a);

the movable ring (42) is axially movably arranged in the first chamber (51a), a limiting structure for limiting the rotation of the movable ring (42) is arranged between the movable ring (42) and the inner wall of the first compartment (5a), the first end of the movable ring (42) is abutted against the third elastic part (40), and the second end of the movable ring faces the rotary drum (41) and is in a sawtooth shape matched with the first end surface of the rotary drum (41) so as to force the rotary drum (41) to rotate.

4. A water inlet fitting according to claim 3, wherein: the positioning assembly is a positioning needle (24) connected with a position, located on the outer side of the first chamber (51a), of the piston rod (21), the positioning needle (24) extends axially along the rotary drum (41), a first through hole (54a) for the positioning needle (24) to movably penetrate through is formed in the side wall, facing the side pipe (14), of the first compartment (5a), and the second end of the rotary drum (41) is a closed end and is provided with a slot (414) for the end portion of the positioning needle (24) to detachably insert into the first through hole (54 a).

5. A water inlet fitting according to claim 3, wherein: one of the outer peripheral wall of the movable ring (42) and the inner peripheral wall of the first compartment (5a) is provided with a guide block (421), the other one of the outer peripheral wall of the movable ring (42) and the inner peripheral wall of the first compartment (5a) is provided with a guide groove (55a) in which the guide block (421) can slide, the guide groove (55a) extends axially along the first compartment (5a), and the guide groove (55a) and the guide block (421) form the limiting structure.

6. The water inlet joint of claim 2, wherein: the compartment is a second compartment (5b), the chamber is a second chamber (51b), the valve core is a second valve core (4b), the second chamber (51b) is at least partially cylindrical, the axis of the second chamber is basically vertical to the axis of the flow passage (13), the second valve core (4b) is axially movably arranged at the cylindrical part of the second chamber (51b), and the second through hole (53b) is positioned on the side wall of the second compartment (5b) facing the side pipe (14) and faces the second valve core (4 b).

7. The water inlet joint of claim 6, wherein: the second valve core (4b) is in a cylindrical shape with one open end, the piston rod (21) sequentially penetrates through the side wall of the second compartment (5b) and the second valve core (4b), and the baffle plate (22) is axially movably arranged in the second valve core (4 b).

8. The water inlet joint of claim 7, wherein: a branch pipe (17) which is opposite to the side pipe (14) and communicated with the flow passage (13) is arranged on the pipe body (1), the branch pipe (17) is used as a part of the second compartment (5b), and the pipe wall of the branch pipe (17) is provided with an accommodating cavity (16) communicated with the second cavity (51b) of the second compartment (5b), the positioning component comprises a positioning pin (61) arranged in the accommodating cavity (16) and a fourth elastic piece (62), a second through hole (41b) is arranged on the side wall of the second valve core (4b), the positioning pin (61) always has the tendency of at least partially penetrating through the second through hole (41b) and being positioned in the second valve core (4b) under the action of the fourth elastic piece (62), the positioning pin (61) can abut against the baffle plate (22), and the end face of the positioning pin (61) abutting against the baffle plate (22) is an inclined surface which inclines towards the flow channel (13) from the water inlet (11) to the water outlet (12).

9. The water inlet joint of claim 1, wherein: the blocking pin (3) partially extends into the side pipe (14) and can be abutted against the end face, facing the flow channel (13), of the piston (2), and the end face (32) of the blocking pin (3), close to one end of the side pipe (14), is an inclined face inclined from the direction of the water inlet (11) to the direction of the water outlet (12) to the direction of the water outlet far away from the flow channel (13).

10. A water heater using the water inlet connector as claimed in any one of claims 1 to 9, wherein: the water heater also comprises a water heater body (B), and a water outlet (12) of the water inlet joint is connected with the water inlet end of the water heater body (B).

Images