CN220037474U - Switching device - Google Patents

Abstract

The utility model provides a switching device, which relates to the technical field of water heaters and comprises a main body, a plugging piece, a absorbable piece and a guiding and limiting structure, wherein the plugging piece and the absorbable piece can be connected magnetically; when the pressure difference of the two sides of the plugging piece along the direction from the inlet to the outlet is larger than the attractive force between the plugging piece and the inhalable piece, the plugging piece moves to the communicating position; when the pressure difference of the two sides of the plugging piece along the direction from the inlet to the outlet is smaller than the attractive force between the plugging piece and the inhalable piece, the plugging piece moves to a plugging position; the guide limiting structure can limit the axial angle of the plugging piece deviating from the first flow channel in the moving process of the plugging piece. According to the utility model, the deviation angle of the blocking piece can be limited through the guide limiting structure, so that the blocking piece can always move along the axial direction of the first flow channel, the blocking piece is prevented from tilting or toppling in the first flow channel due to the influence of external factors, and the use stability of the switching device is improved.

Description

Switching device

Technical Field

The utility model relates to the technical field of water heaters, in particular to a switching device.

Background

The water heater is one of the requisite household devices, can provide bath hot water and kitchen hot water, but no matter how the water heater is installed, a section of water pipe is always arranged between the water heater and each water consumption point, when the water consumption point is not used for a long time, the hot water of the section of water pipe can be slowly cooled, and when the water consumption point is used for the next time, particularly when the water consumption point is used for the next time, the section of cold water is firstly discharged, so that not only is a great amount of water resource wasted, but also uncomfortable bath experience is brought to a user. According to research and study, in a ten-story high resident house, the length of the pipeline is above 5 meters on average, the pipeline diameter is measured and calculated according to 20mm, the cold water discharged before each bath of each household is about 1.6 liters, and each household uses 2 gas water heaters for bath every day on average, so that the water consumption per household per year is about 1150 liters, the total water consumption per year of the whole resident building is calculated according to 300 households, and the total water consumption per year is up to 345 tons.

In order to improve bath comfort of users and save water resources, research and development staff tries to develop a technology of preheating and circulating cold water in a pipeline by using a circulating pump, and related prior art discloses a hot water system which pumps back cooled water in a pipeline connecting a water consumption point and a water heater to the water heater for preheating by adding the circulating pump and a water return flow path inside the water heater. In the hot water system, a one-way valve is arranged between a return water flow path and a hot water pipeline, and is in an off state under the condition of normal water, and the one-way valve is opened to communicate the return water flow path with the hot water pipeline only when a circulating pump is started to perform preheating circulation, so that circulating heating is completed.

However, the currently adopted check valve is usually a reset mechanism by a spring, when the water heater controls the circulating pump to open the check valve with a certain initial pressure, the spring is generally compressed, and then the restoring force acting on the plugging mechanism is increased, so that the problem of pressure release and rebound caused by the fact that the check valve is opened is solved, and the circulating pump needs to continuously increase the pressure to keep the opening state of the check valve to ensure stable backwater circulation, so that the requirement on the circulating pump is higher.

In addition, sometimes the pressure of the cold water pipeline and the hot water pipeline fluctuates to cause the pressure difference at two sides of the check valve to be larger than the initial opening pressure, and even if the pressure difference is maintained for a short time, the check valve still can be opened under the condition, so that the cold water and the hot water form a series flow, and the waste of heat energy is caused.

Disclosure of Invention

In order to overcome the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a switching device, which is capable of solving at least one of the above-mentioned problems and has better use stability.

To achieve the above object, the present utility model provides a switching device comprising:

a body having a first flow passage with an inlet and an outlet;

a magnetically-connectable blocking member and a attractable member, the attractable member being disposed at the inlet, the blocking member being slidably disposed in the first flow passage; the plugging piece is provided with a plugging position and a communicating position which are separated by a preset distance; when the pressure difference between the two sides of the plugging piece along the direction from the inlet to the outlet is larger than the attractive force between the plugging piece and the inhalable piece, the plugging piece can move to the communication position; when the pressure difference of the two sides of the plugging piece along the direction from the inlet to the outlet is smaller than the attractive force between the plugging piece and the inhalable piece, the plugging piece can move to the plugging position;

the guide limiting structure can limit the axial angle of the plugging piece deviating from the first flow channel in the moving process of the plugging piece.

In a preferred embodiment of the present utility model, the guiding and limiting structure includes:

the limiting piece is arranged in the first flow channel and is arranged on the other side of the blocking piece relative to the absorbable piece;

and one end of the guide rod is connected with the end face of the plugging piece, which is close to one side of the outlet, and the guide rod is arranged along the axial direction of the first flow passage and is movably inserted into the limiting piece.

In a preferred embodiment of the utility model, the guide rod is detachably connected with the blocking piece, or the guide rod and the blocking piece are integrally formed.

In a preferred embodiment of the present utility model, the limiting member includes a limiting plate disposed in the first flow channel, and the limiting plate is provided with a guide through hole penetrating through both sides of the guide rod along an axial direction of the guide rod, and the guide rod is slidably inserted into the guide through hole.

In a preferred embodiment of the present utility model, an overflow gap is provided between the guide through hole and the guide rod; and/or the limiting plate is provided with at least one through hole, and the through holes are communicated with two sides of the limiting plate.

In a preferred embodiment of the present utility model, two ends of the guide rod are respectively disposed at two sides of the limiting plate along the axial direction of the first flow channel.

In a preferred embodiment of the present utility model, the guiding and limiting structure further includes a supporting member disposed on the guide rod, where the supporting member is movably disposed in the first flow channel and is disposed on the other side of the limiting member with respect to the blocking member, and a projection of the supporting member on the blocking member is greater than a projection of the guide rod on the blocking member along an axial direction of the guide rod.

In a preferred embodiment of the present utility model, the limiting member includes a limiting block disposed in the first flow channel, the limiting block is disposed on an inner wall of the first flow channel in a surrounding manner along a circumferential direction of the first flow channel, an axial blocking shoulder is disposed on a side of the limiting block, which is close to the blocking member, and the blocking member abuts against the axial blocking shoulder in the communicating position.

In a preferred embodiment of the present utility model, the guiding and limiting structure includes:

the limiting piece comprises a baffle plate arranged in the first flow channel, and the baffle plate is arranged on the other side of the blocking piece relative to the absorbable piece;

one end of the guide rod is connected with the end face of the plugging piece close to one side of the outlet, and the guide rod is movably arranged in a first flow channel between the baffle plate and the plugging piece;

the support piece is arranged on the guide rod, the support piece is movably arranged in a first flow passage between the baffle plate and the blocking piece, and the projection of the support piece on the blocking piece is larger than the projection of the guide rod on the blocking piece along the axial direction of the guide rod.

In a preferred embodiment of the present utility model, along the flow direction of the first flow channel, a first flow-through structure and a second flow-through structure are sequentially arranged on the side wall of the main body, the first flow-through structure is communicated with the outer side of the main body and the first flow channel, the second flow-through structure is communicated with the outer side of the main body and the first flow channel, a second flow channel is arranged on the outer side of the main body, the first flow-through structure is communicated with the second flow channel through the second flow channel, and the limiting member is arranged between the first flow-through structure and the second flow-through structure.

In a preferred embodiment of the present utility model, the plugging member is spaced from the inner wall of the first flow channel to form a sliding gap.

The technical scheme of the utility model has the following remarkable beneficial effects:

according to the switch device, the blocking piece and the absorbable piece which can be mutually magnetically attracted are utilized, and the principle that the magnitude and the distance of magnetic force are inversely related is utilized, so that attractive force between the blocking piece and the absorbable piece is gradually reduced in the process that the blocking piece moves to the communicating position, and when the preset distance of the blocking piece moves to the communicating position, attractive force between the blocking piece and the absorbable piece is reduced, although certain pressure relief is formed after the first flow passage is communicated, water pressure can still maintain the blocking piece at the communicating position after the pressure relief, and therefore, in the switch device, the circulating pump can maintain the communicating state of the first flow passage without increasing pressure, and a stable backwater flow passage is formed.

Meanwhile, the plugging piece can be opened after moving a preset distance to a communication position, so that the pressure difference at two sides of the plugging piece needs to be maintained for a period of time greater than the attractive force between the plugging piece and the absorbable piece, and further the problem of cold and hot water series flow caused by water pressure fluctuation between a cold water pipeline and a hot water pipeline can be effectively avoided.

Moreover, the plugging piece is easily influenced by factors such as water pressure fluctuation, scale and the like in the moving process, so that the plugging piece has the risk of tilting or toppling. When the blocking piece tilts or tilts in the first flow channel, the switching device is easy to fail because the switching device cannot be closed. In order to avoid the problem that the plugging piece inclines or tilts in the first flow channel, the switch device is further provided with a guide limit structure, and the plugging piece can be limited to deviate from the axial angle of the first flow channel through the guide limit structure, so that the plugging piece can always move along the axial direction of the first flow channel, the plugging piece is prevented from inclining or tilting in the first flow channel due to the influence of external factors, and the use stability of the switch device is remarkably improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

The drawings described herein are for illustration purposes only and are not intended to limit the scope of the present disclosure in any way. In addition, the shapes, proportional sizes, and the like of the respective components in the drawings are merely illustrative for aiding in understanding the present utility model, and are not particularly limited. Those skilled in the art with access to the teachings of the present utility model can select a variety of possible shapes and scale sizes to practice the present utility model as the case may be.

FIG. 1 is a schematic cross-sectional view of the switching device with a limiting plate in a connected position;

FIG. 2 is a schematic cross-sectional view of the switching device with a stop plate in a blocking position;

FIG. 3 is a schematic cross-sectional view of the switching device with the shutter in the connected position;

FIG. 4 is a schematic cross-sectional view of the switching device with the shutter in the blocking position;

FIG. 5 is a schematic cross-sectional view of the switch device with the stopper in the connected position;

FIG. 6 is a schematic cross-sectional view of the switching device with stopper in the blocking position;

FIG. 7 is a schematic diagram of a front view of the limiting plate;

FIG. 8 is a schematic diagram of a front view of the limiting plate and the guide rod in a plugging state;

fig. 9 is a schematic front view of the limiting plate with the through holes.

Reference numerals of the above drawings:

1. a main body; 11. a first flow passage; 12. an inlet; 13. an outlet; 14. a second flow passage;

2. a blocking member;

3. a suction member;

4. a guiding and limiting structure;

41. a limiting piece; 411. a limiting plate; 412. a guide through hole; 413. an overcurrent gap; 414. a through-flow hole; 415. a limiting block; 416. an axial shoulder; 417. a baffle;

42. a guide rod;

43. a support;

5. a first overcurrent structure;

6. and a second overcurrent structure.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 and 2 in combination, a switching device is provided in an embodiment of the present utility model, the switching device includes a main body 1, a magnetically connectable blocking member 2, a magnetically connectable absorbing member 3, and a guiding and limiting structure 4, the main body 1 has a first flow channel 11, and the first flow channel 11 has an inlet 12 and an outlet 13; the suction member 3 is arranged at the inlet 12, and the blocking member 2 is slidably arranged in the first flow channel 11; the plugging piece 2 is provided with a plugging position and a communicating position which are separated by a preset distance; when the pressure difference of the two sides of the plugging piece 2 along the direction from the inlet 12 to the outlet 13 is larger than the attractive force between the plugging piece 2 and the inhalable piece 3, the plugging piece 2 can move to the communicating position; when the pressure difference of the two sides of the blocking piece 2 along the direction from the inlet 12 to the outlet 13 is smaller than the attractive force between the blocking piece 2 and the inhalable piece 3, the blocking piece 2 can move to the blocking position; the guiding and limiting structure 4 can limit the axial angle of the plugging piece 2 deviating from the first flow channel 11 during the movement of the plugging piece 2.

In the whole, the switch device utilizes the principle that the magnitude and the distance of magnetic force are inversely related to each other by utilizing the blocking piece 2 and the absorbable piece 3 which can be mutually magnetically attracted, so that the attractive force between the blocking piece 2 and the absorbable piece 3 is gradually reduced in the process that the blocking piece 2 moves to the communicating position in the blocking position, when the preset distance of the blocking piece 2 moves to the communicating position, the attractive force between the blocking piece 2 and the absorbable piece 3 is reduced, although certain pressure relief is formed after the first flow passage 11 is communicated, the water pressure can still maintain the blocking piece 2 at the communicating position after the pressure relief, and therefore, in the utility model, the circulating pump can maintain the communicating state of the first flow passage 11 without increasing the pressure, and a stable backwater flow passage is formed.

Meanwhile, the plugging piece 2 in the utility model can be opened after moving a preset distance to reach a communication position, so that the pressure difference at two sides of the plugging piece 2 needs to be maintained for a period of time greater than the attractive force between the plugging piece 2 and the inhalable piece 3, and further the problem of cold and hot water series flow caused by water pressure fluctuation between a cold water pipeline and a hot water pipeline can be effectively avoided.

Moreover, the plugging member 2 is susceptible to water pressure fluctuation, scale and other factors during the movement process, so that the plugging member 2 is at risk of tilting or toppling. When the closure member 2 is tilted or tipped in the first flow path 11, it is liable to cause the switching device to fail because it cannot be closed. In order to avoid the problem that the plugging piece 2 tilts or tilts in the first flow channel 11, the switch device is further provided with a guide limit structure 4, and the angle of the plugging piece 2 deviating from the axial direction of the first flow channel 11 can be limited through the guide limit structure 4, so that the plugging piece 2 can always move along the axial direction of the first flow channel 11, the plugging piece 2 is prevented from tilting or tilting in the first flow channel 11 due to the influence of external factors, and the use stability of the switch device is obviously improved.

The designer may control the amount of angle the closure member 2 is offset from the axial direction of the first flow passage 11 depending on the needs of the application, for example, to move the closure member 2 in the axial direction of the first flow passage 11 at all times, or to enable movement of the closure member 2 in the axial direction of the first flow passage 11 substantially, without limitation to the specific values herein.

In one embodiment, the switching device is used to place the outlet 13 of the first flow passage 11 in communication with a cold water line or a return water flow path and the inlet 12 of the first flow passage 11 in communication with a hot water line.

When no backwater heating is performed, the blocking piece 2 is located at the blocking position, and the first runner 11 in the main body 1 is in a blocking state. When the backwater heating is performed, the circulating pump is turned on, and the sealing member 2 can move to the communicating position when the pressure difference between the two sides of the sealing member 2 along the direction from the inlet 12 to the outlet 13 is larger than the attractive force between the sealing member 2 and the inhalable member 3 based on the pressure provided by the circulating pump.

Based on the magnetic action between the blocking member 2 and the inhalable member 3, as the blocking member 2 moves, the blocking member 2 is further and further away from the inhalable member 3, and the attractive force between the blocking member 2 and the inhalable member 3 gradually decreases due to the fact that the strength of the magnetic force is inversely related to the distance.

When the closure member 2 moves a predetermined distance to the communication position, the first flow passage 11 is opened, thereby communicating the return water flow passage. At this time, although there is a certain degree of pressure relief at the communication position, since the attractive force between the plug 2 and the inhalable member 3 is reduced by the same increase in distance, the circulation pump can maintain the communication state on both sides of the first flow passage 11 without increasing the pressure, and a stable return water flow path is formed.

When the backwater heating is finished, the circulating pump stops working, the pressure difference at two sides of the plugging piece 2 disappears, the plugging piece 2 is re-attracted to the plugging position by virtue of the magnetic attraction between the plugging piece 2 and the attractable piece 3, and then the cold water pipeline and the hot water pipeline are isolated again.

As can be seen from the above, the switch device according to the present utility model uses the relationship that the magnitude and the distance of the magnetic force are inversely related to each other by using the blocking member 2 and the inhalable member 3 that can magnetically attract each other, so that the attractive force between the blocking member 2 and the inhalable member 3 gradually decreases when the blocking member 2 moves to the communication position from the blocking position, and when the blocking member 2 moves to the communication position from the preset distance, the magnetic attractive force between the blocking member 2 and the inhalable member 3 decreases, and although a certain pressure relief is formed after the first flow passage 11 is communicated, the water pressure can still maintain the blocking member 2 at the communication position after the pressure relief, so that in this embodiment, the circulation pump can maintain the communication state of the first flow passage 11 without increasing the pressure, thereby forming a stable return water flow passage.

Meanwhile, in this embodiment, the plugging member 2 can be opened after moving a predetermined distance to reach the communication position, so that the pressure difference between two sides of the plugging member 2 needs to be maintained to be greater than the magnetic attraction between the plugging member 2 and the inhalable member 3 for a period of time, so as to effectively avoid the problem of cold and hot water series flow caused by water pressure fluctuation of the cold water pipeline and the hot water pipeline.

Further, the main body 1 has various shapes and structures, which can be matched with the shape and configuration of the first flow passage 11, and the present utility model is not limited in any way.

For example, the main body 1 may be integrally formed as a pipe body to accommodate a room hot and cold water pipe configuration. The first flow channel 11 of the main body 1 has an outlet 13 and an inlet 12, and a single channel or a plurality of channels may exist between the outlet 13 and the inlet 12, or a mixture of a trunk and a branch may exist.

In a possible embodiment of the utility model, the first flow channel 11 is arranged with a circular cross section. Of course, the designer may also adjust the cross-sectional shape of the first flow channel 11, such as polygonal or other irregular shape, according to the use requirement, so that the first flow channel 11 can supply water flow, without any limitation on the specific shape and configuration of the first flow channel 11.

Further, in order to avoid the body 1 from affecting the use of the blocking member 2 and the attractable member 3, the material of the body 1 is a non-magnetic material or a material that is not magnetically attracted. In a preferred embodiment, the body 1 may be of plastic material.

Wherein at least one of the blocking member 2 and the attractable member 3 has magnetism. For example, taking the magnetic property of the closure member 2 as an example, the closure member 2 may be made of a magnetic substance (material) or may be an electromagnet, and the closure member 2 may have a plurality of magnetic properties in consideration of a plurality of magnetic substances.

In the embodiment of the present utility model, based on the fact that the magnetic attraction force is mutual, at least one of the attractable member 3 and the blocking member 2 may be made of a magnetic material. That is, both the smokable member 3 and the blocking member 2 may be made of a magnetic material; alternatively, only one of the two may be made of a magnetic material, and the other may be made of a material that attracts an element made of a magnetic material, such as a ferrous member. Wherein the magnetic material is preferably a ferromagnetic material.

In the embodiment of the utility model, the blocking member 2 is slidably arranged in the first flow channel 11, and the position of the inhalable member 3 may be arranged in a plurality of ways. For example, the inhalable member 3 is fixedly disposed in the first flow passage 11, or the inhalable member 3 may be disposed outside the first flow passage 11, or the inhalable member 3 may be a part of the inner wall of the first flow passage 11, without being particularly limited thereto.

Further, the blocking member 2 and the inhalable member 3 may be in direct contact, or the blocking member 2 and the inhalable member 3 may be in spaced contact, without being particularly limited thereto.

The shape and configuration of the blocking member 2 and the inhalable member 3 can be adjusted by a designer according to the use requirements, and are not particularly limited herein. For example, when the closure member 2 is placed in the first flow channel 11, the shape of the closure member 2 may match the cross-sectional shape of the first flow channel 11. When the inhalable member 3 is disposed outside the first flow channel 11, the shape of the inhalable member 3 is not limited, and only the inhalable member 3 and the blocking member 2 need to be magnetically attracted.

In the embodiment of the present utility model, as in the example shown in fig. 1 and 2, the blocking member 2 has a blocking position and a communicating position, the blocking position being spaced apart from the communicating position by a predetermined distance. Under the action of the preset distance, the plugging piece 2 needs to move by the preset distance to reach the plugging position or the communicating position.

At the same time, the distance between the blocking piece 2 and the inhalable piece 3 gradually decreases when the blocking piece moves from the communication position to the blocking position. Accordingly, the distance from the suction member 3 increases gradually as the blocking member 2 moves from the blocking position to the communication position.

The blocking position and the communicating position may be set to fixed positions, the blocking member 2 is located at the blocking position to block the first flow channel 11, and the blocking member 2 is located at the communicating position to open the first flow channel 11 (the first flow channel 11 is in a communicating state), and the transition from blocking to opening can be understood in the moving process of the blocking member 2, that is, a slight water leakage is allowed in the moving process of the blocking member 2, and the influence of the slight water leakage on the pressure difference across the blocking member 2 is very weak. When the blocking member 2 is in the communication position, the first flow passage 11 is in a completely opened state, and the pressure relief (pressure drop) at this time is more remarkable than the pressure relief caused by the water leakage, and at the same time, the water flow is also larger.

It should be further noted that, the preset distance between the blocking position and the communicating position can enable the blocking member 2 at the blocking position to still keep the state of blocking the first flow channel 11 when slightly moving, while the blocking mechanism in the prior art is displaced, i.e. opened, so that the switching device provided in the embodiment of the utility model can effectively prevent the phenomenon of cold and hot water series flow, and has better stability.

Further, the blocking position and the communication position of the blocking member 2 may be spaced apart by a predetermined distance along the movement direction of the water flow in the first flow passage 11, for example, the blocking position and the communication position may be spaced apart along the axial direction of the first flow passage 11.

In a specific embodiment, taking a cold and hot water pipeline as an example, the inlet 12 of the first runner 11 may be connected to a hot water pipeline, and the outlet 13 of the first runner 11 may be connected to a cold water pipeline, so as to adapt to a cyclic heating process of water flowing from the hot water pipeline to the cold water pipeline. The blocking position may also be said to be upstream of the communication position in the circulation heating circuit of the hot water system.

In the embodiment of the utility model, the guiding and limiting structure 4 comprises a limiting piece 41 and a guide rod 42, wherein the limiting piece 41 is arranged in the first flow channel 11 and at the other side of the plugging piece 2 relative to the inhalable piece 3; one end of the guide rod 42 is connected to the end face of the blocking member 2 on the side close to the outlet 13, and the guide rod 42 is disposed along the axial direction of the first flow passage 11 and is movably inserted into the stopper 41.

By connecting one end of the guide rod 42 to the closure member 2, the guide rod 42 can move synchronously with the closure member 2. When the guide rod 42 is inserted into the limiting member 41, the limiting member 41 is utilized to limit the movement direction of the guide rod 42, so that the guide rod 42 can only reciprocate along the axial direction of the first flow channel 11, thereby limiting the movement direction of the blocking member 2, enabling the blocking member 2 to only move along the axial direction of the first flow channel 11, and avoiding the problem that the blocking member 2 tilts or tilts in the first flow channel 11.

In a specific embodiment, as in the embodiment shown in fig. 7 and 8, the first flow passage 11 is provided with a circular cross section. The closure member 2 is slidably arranged in the first flow channel 11 and an overflow gap 413 is provided between the closure member 2 and the inner wall of the first flow channel 11. The flow gap 413 provides a sliding space for the closure member 2 on the one hand and on the other hand is able to accommodate part of the scale, avoiding that the scale blocks the movement of the closure member 2.

In other embodiments, the designer may adjust the cross-sectional shape of the first flow passage 11 according to the use requirement, and is not particularly limited herein.

In a possible embodiment of the utility model, the guide rod 42 is detachably connected to the closure element 2. By detachably engaging the guide rod 42 with the closure member 2, the guide rod 42 and the closure member 2 are easily and quickly assembled, and the guide rod 42 and the closure member 2 are easily inspected and replaced.

In one embodiment, the guide rod 42 is threadably coupled to the closure member 2. A threaded section is provided at one end of the guide rod 42, and a screw hole is provided in the middle of the plugging member 2, so that one end of the guide rod 42 can be screwed with the plugging member 2.

In another embodiment, the guide rod 42 is engaged with the blocking member 2. A first clamping structure is arranged at one end of the guide rod 42, and a second clamping structure is arranged on the plugging piece 2, so that the guide rod 42 and the plugging piece 2 are clamped through the first clamping structure and the second clamping structure.

The designer can adjust the first clamping structure and the second clamping structure according to the use requirement, for example, the first clamping structure is set as a clamping block, the second clamping structure is set as a slot, or the first clamping structure is set as a first buckle, the second clamping structure is set as a second buckle, which is not limited herein.

In other embodiments, the designer may adjust the removable structure between the guide rod 42 and the closure 2 according to the needs of the application, without any particular limitation.

In one embodiment, the guide rod 42 is adhesively attached to the closure member 2. The manner of pasting is not particularly limited herein.

In a further possible embodiment of the utility model, the guide rod 42 is provided integrally with the closure element 2. Through the integrated setting of guide arm 42 and shutoff piece 2, improved the joint strength between guide arm 42 and the shutoff piece 2, also avoided the problem that takes place unexpected unblock between guide arm 42 and the shutoff piece 2.

The designer may determine the molding mode between the guide rod 42 and the plugging member 2 according to the usage requirement, for example, the guide rod 42 and the plugging member 2 may be injection molded, which is not limited herein.

In one embodiment, the guide rod 42 and the housing of the closure member 2 may be injection molded from a non-magnetic material, with a magnetic member embedded in the closure member 2.

In a possible embodiment of the present utility model, as shown in fig. 9, the limiting member 41 includes a limiting plate 411 disposed in the first flow channel 11, and the limiting plate 411 is provided with guide through holes 412 penetrating both sides thereof in the axial direction of the guide rod 42, and the guide rod 42 is slidably inserted into the guide through holes 412.

By disposing the limiting plate 411 in the first flow passage 11, and providing the guide through hole 412 on the limiting plate 411, the guide through hole 412 can play a role of guide and limitation.

Specifically, the guide through hole 412 is disposed along the axial direction of the first flow channel 11, and when the guide rod 42 is inserted into the guide through hole 412, the guide through hole 412 can guide the guide rod 42 along the axial direction of the first flow channel 11 and limit the guide rod 42 along the radial direction of the first flow channel 11, so that the guide rod 42 can only make sliding movement along the axial direction of the guide through hole 412, thereby driving the plugging piece 2 to slide along the axial direction of the first flow channel 11.

The designer may adjust the shape configuration of the limiting plate 411 according to the use requirement, for example, the limiting plate 411 is provided as a circular plate body and perpendicular to the axial direction of the first flow passage 11, which is not particularly limited herein.

During use of the switchgear, there is a fluid in the space between the blocking element 2 and the limiting plate 411, which needs to be removed in time to avoid affecting the movement of the blocking element 2.

In one embodiment of the present utility model, an overflow gap 413 is provided between the guide through hole 412 and the guide rod 42. By providing the flow gap 413 between the guide through hole 412 and the guide rod 42, the blocking piece 2 can squeeze the fluid out of the flow gap 413 when the blocking piece 2 moves toward the limiting plate 411, so that the fluid does not react to affect the movement stroke of the blocking piece 2.

The designer may adjust the shape configuration of the flow gap 413 according to the usage requirement, for example, the flow gap 413 is a continuous ring shape formed by clamping the guide rod 42 and the inner wall of the guide through hole 412, or the flow gap 413 is a discontinuous arc shape formed by clamping the guide rod 42 and the inner wall of the guide through hole 412, which is not limited herein.

In another embodiment, the limiting plate 411 is provided with at least one through hole 414, and the through hole 414 communicates with two sides of the limiting plate 411. When the blocking piece 2 moves towards the limiting plate 411, the blocking piece 2 can squeeze fluid out of the through-flow hole 414, so that the fluid cannot react to influence the movement stroke of the blocking piece 2.

In another embodiment, a through-flow gap 413 is disposed between the guide through hole 412 and the guide rod 42, and at least one through-flow hole 414 is disposed on the limiting plate 411, and the through-flow hole 414 communicates with two sides of the limiting plate 411. By matching the through-flow gap 413 with the through-flow hole 414, the extrusion speed of the fluid can be further increased, and the influence on the movement stroke of the plugging member 2 can be avoided.

The designer can adjust the arrangement position and the arrangement number of the through-flow holes 414 according to the use requirement, and is not particularly limited herein.

In the embodiment of the present utility model, two ends of the guide rod 42 are disposed at two sides of the limiting plate 411 along the axial direction of the first flow channel 11, respectively.

Specifically, the length of the guide rod 42 is greater than the movement stroke of the plugging piece 2, so that two ends of the guide rod 42 can be respectively arranged at two sides of the limiting plate 411, and the problem that the guide rod 42 breaks away from the limiting plate 411 to cause guide failure is avoided. The length of the guide rod 42 can be adjusted by a designer according to the use requirements, and is not particularly limited herein.

In another possible embodiment of the present utility model, the guiding and limiting structure 4 further comprises a supporting member 43 disposed on the guiding rod 42, wherein the supporting member 43 is movably disposed in the first flow channel 11 and is disposed on the other side of the limiting member 41 with respect to the blocking member 2, and the projection of the supporting member 43 on the blocking member 2 is larger than the projection of the guiding rod 42 on the blocking member 2 along the axial direction of the guiding rod 42.

By arranging the supporting piece 43 on the guide rod 42, and the projection of the supporting piece 43 on the plugging piece 2 along the axial direction of the guide rod 42 is larger than the projection of the guide rod 42 on the plugging piece 2, the supporting piece 43 can limit the guide rod 42 along the radial direction of the first flow channel 11, so that the guide rod 42 is prevented from deviating from the axial direction of the first flow channel 11 in the moving process, and the plugging piece 2 is prevented from tilting or tipping.

Also, by disposing the stopper 41 between the support 43 and the stopper 2, the stopper 41 can be engaged with the inhalable member 3, thereby restricting the travel of the stopper 2 in the first flow passage 11, avoiding the stopper 2 from being separated from the first flow passage 11.

In one embodiment, at least a portion of the support 43 is slidably engaged with the inner wall of the first flow channel 11. By slidably engaging the outer wall of the support 43 with the inner wall of the first flow channel 11, the movement direction of the guide rod 42 can be better limited, so that the guide rod 42 and the blocking member 2 can move only in the axial direction of the first flow channel 11.

The designer may adjust the shape configuration of the support 43 according to the use requirement, for example, the support 43 may be provided in a plate shape, or the support 43 may be provided in a block shape, or the support 43 may be provided in a frame structure, without being particularly limited thereto.

Further, as shown in the embodiment of fig. 5 and 6, the limiting member 41 includes a limiting member 415 disposed in the first flow channel 11, the limiting member 415 is disposed on the inner wall of the first flow channel 11 along the circumferential direction of the first flow channel 11, an axial shoulder 416 is disposed on a side of the limiting member 415 near the blocking member 2, and in the communicating position, the blocking member 2 abuts against the axial shoulder 416.

Through setting up stopper 415 between support piece 43 and shutoff piece 2, utilize the axial shoulder 416 on the stopper 415 to form axial spacing to shutoff piece 2, avoid shutoff piece 2 to break away from first runner 11 to axial shoulder 416 position can be as the intercommunication position, the location of being convenient for more.

The blocking piece 2 may directly abut against the axial shoulder 416, or the blocking piece 2 may indirectly abut against the axial shoulder 416 through an intermediate piece, which is not particularly limited herein.

In a further possible embodiment of the utility model, as in the embodiment shown in fig. 3 and 4, the guiding and limiting structure 4 comprises a limiting member 41, a guiding rod 42 and a supporting member 43, the limiting member 41 comprising a baffle 417 arranged in the first flow channel 11, the baffle 417 being arranged on the other side of the blocking member 2 with respect to the inhalable member 3; one end of a guide rod 42 is connected with the end face of the plugging member 2 near the outlet 13, and the guide rod 42 is movably arranged in the first flow channel 11 between the baffle 417 and the plugging member 2; the support 43 is disposed on the guide rod 42, the support 43 is movably disposed in the first flow passage 11 between the baffle 417 and the blocking member 2, and a projection of the support 43 on the blocking member 2 is larger than a projection of the guide rod 42 on the blocking member 2 in an axial direction of the guide rod 42.

By providing the baffle 417 in the first flow passage 11, the baffle 417 cooperates with a portion of the inner wall of the first flow passage 11 to form a receiving chamber. In the connected position, the closure element 2 can be placed in the receiving space and an axial limitation of the guide rod 42 is provided by the stop 417.

In the embodiment of the utility model, along the flow direction of the first flow channel 11, the side wall of the main body 1 is sequentially provided with a first flow-through structure 5 and a second flow-through structure 6, the first flow-through structure 5 is communicated with the first flow channel 11 at the outer side of the main body 1, the second flow-through structure 6 is communicated with the first flow channel 11 at the outer side of the main body 1, the second flow channel 14 is arranged at the outer side of the main body 1, the first flow-through structure 5 is communicated with the second flow-through structure 6 through the second flow channel 14, and the limiting piece 41 is arranged between the first flow-through structure 5 and the second flow-through structure 6.

Specifically, the first flow-through structure 5 includes at least one first flow-through opening provided on a side wall of the first flow channel 11, and the second flow-through structure 6 includes at least one second flow-through opening provided on a side wall of the first flow channel 11.

The first through-flow port can communicate the first flow channel 11 with the second flow channel 14 along the flow direction of the fluid in the first flow channel 11, and the second through-flow port can communicate the second flow channel 14 with the first flow channel 11, i.e. the first through-flow port is disposed upstream of the second through-flow port.

Further, in order to facilitate stable and rapid drainage, the first through flow openings and the second through flow openings are provided in plurality, and each first through flow opening and each second through flow opening are arranged at intervals along the circumferential direction of the first flow channel 11. The designer can adjust the shape structure and the number of the first through-flow openings and the second through-flow openings according to the use requirement, and the design is not particularly limited herein.

In a specific embodiment, the first through-flow opening and the second through-flow opening are both configured as rectangular structures, and the axial direction of the first flow channel 11 is the long side thereof. The width of the first through-flow opening can be narrower, so that the plugging piece 2 is prevented from tilting or toppling under the influence of the first through-flow opening when moving to the first through-flow opening, and the movement stability of the plugging piece 2 is improved.

And the total area of each second through-flow opening is larger than that of the first through-flow opening, so that the side of the second through-flow opening can deform before the side of the first through-flow opening under some conditions, the purpose of protecting the side of the first through-flow opening is achieved, the normal use of the plugging piece 2 is avoided, and the service life of the switching device is prolonged.

In the above embodiment, the main body 1 of the switching device may be connected to the hot and cold water pipes. In addition, the switch device may further include an outer tube, the outer tube is sleeved outside the main body 1, and the inhalable member 3 is disposed in the outer tube and is located outside the main body 1. The two ends of the outer tube are respectively connected with a cold water pipeline and a hot water pipeline, and the cold water pipeline and the hot water pipeline can be coaxially arranged with the main body 1.

Specifically, the inner wall of the outer tube may be respectively connected with two ends of the main body 1 in a sealing manner, so that a second flow passage 14 communicating the first through flow port and the second through flow port is formed between the main body 1 and the outer tube.

When the plugging piece 2 is in the communicating position, the circulating waterway realizes passage water through the second flow passage 14. Wherein the outer tube may be formed of two parts which are detachable, thereby facilitating the installation of the body 1 into the outer tube. The two parts of the outer tube can be three-way structures to provide a cold water outlet end and a hot water outlet end.

All articles and references, including patent applications and publications, disclosed herein are incorporated by reference for all purposes. The term "consisting essentially of …" describing a combination shall include the identified element, ingredient, component or step as well as other elements, ingredients, components or steps that do not substantially affect the essential novel features of the combination. The use of the terms "comprises" or "comprising" to describe combinations of elements, components, or steps herein also contemplates embodiments consisting essentially of such elements, components, or steps. By using the term "may" herein, it is intended that any attribute described as "may" be included is optional. Multiple elements, components, parts or steps can be provided by a single integrated element, component, part or step. Alternatively, a single integrated element, component, part or step may be divided into separate plural elements, components, parts or steps. The disclosure of "a" or "an" to describe an element, component, section or step is not intended to exclude other elements, components, sections or steps.

In this specification, each embodiment is described in a progressive manner, and each embodiment is mainly described by differences from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. The above embodiments are provided to illustrate the technical concept and features of the present utility model and are intended to enable those skilled in the art to understand the content of the present utility model and implement the same, and are not intended to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the spirit of the present utility model should be construed to be included in the scope of the present utility model.

Claims (10)

1. A switching device, comprising:

a body having a first flow passage with an inlet and an outlet;

a magnetically-connectable blocking member and a attractable member, the attractable member being disposed at the inlet, the blocking member being slidably disposed in the first flow passage; the plugging piece is provided with a plugging position and a communicating position which are separated by a preset distance; when the pressure difference between the two sides of the plugging piece along the direction from the inlet to the outlet is larger than the attractive force between the plugging piece and the inhalable piece, the plugging piece can move to the communication position; when the pressure difference of the two sides of the plugging piece along the direction from the inlet to the outlet is smaller than the attractive force between the plugging piece and the inhalable piece, the plugging piece can move to the plugging position;

the guide limiting structure can limit the axial angle of the plugging piece deviating from the first flow channel in the moving process of the plugging piece.

2. The switching device according to claim 1, wherein the guide limiting structure comprises:

the limiting piece is arranged in the first flow channel and is arranged on the other side of the blocking piece relative to the absorbable piece;

and one end of the guide rod is connected with the end face of the plugging piece, which is close to one side of the outlet, and the guide rod is arranged along the axial direction of the first flow passage and is movably inserted into the limiting piece.

3. The switching device according to claim 2, wherein the guide rod is detachably connected to the blocking member or the guide rod is integrally formed with the blocking member.

4. The switching device according to claim 2, wherein the stopper includes a stopper plate provided in the first flow passage, the stopper plate is provided with guide through holes penetrating both sides thereof in an axial direction of the guide rod, and the guide rod is slidably inserted into the guide through holes.

5. The switching device according to claim 4, wherein an overcurrent gap is provided between the guide through hole and the guide rod; and/or

The limiting plate is provided with at least one through hole, and the through holes are communicated with two sides of the limiting plate.

6. The switching device according to claim 5, wherein both ends of the guide bar are disposed on both sides of the limiting plate, respectively, in an axial direction of the first flow path.

7. The switching device according to claim 2, wherein the guide limiting structure further comprises a support member provided on the guide rod, the support member being movably provided in the first flow passage and provided on the other side of the limiting member with respect to the blocking member, and a projection of the support member on the blocking member being larger than a projection of the guide rod on the blocking member in an axial direction of the guide rod.

8. The switching device according to claim 7, wherein the stopper includes a stopper provided in the first flow path, the stopper is provided on an inner wall of the first flow path in a ring shape along a circumferential direction of the first flow path, an axial shoulder is provided on a side of the stopper close to the blocking member, and in the communication position, the blocking member abuts against the axial shoulder.

9. The switching device according to claim 1, wherein the guide limiting structure comprises:

the limiting piece comprises a baffle plate arranged in the first flow channel, and the baffle plate is arranged on the other side of the blocking piece relative to the absorbable piece;

one end of the guide rod is connected with the end face of the plugging piece close to one side of the outlet, and the guide rod is movably arranged in a first flow channel between the baffle plate and the plugging piece;

the support piece is arranged on the guide rod, the support piece is movably arranged in a first flow passage between the baffle plate and the blocking piece, and the projection of the support piece on the blocking piece is larger than the projection of the guide rod on the blocking piece along the axial direction of the guide rod.

10. The switching device according to claim 2 or 9, wherein a first flow-through structure and a second flow-through structure are sequentially arranged on the side wall of the main body along the flow-through direction of the first flow channel, the first flow-through structure is communicated with the outer side of the main body and the first flow channel, the second flow-through structure is communicated with the outer side of the main body and the first flow channel, a second flow channel is arranged on the outer side of the main body, the first flow-through structure is communicated with the second flow channel through the second flow channel, and the limiting piece is arranged between the first flow-through structure and the second flow-through structure.