Backflow-preventing drain valve structure
阅读说明:本技术 一种防倒流的排水阀结构 (Backflow-preventing drain valve structure ) 是由 郑江辉 张荣誉 王兴东 于 2019-09-12 设计创作,主要内容包括:本发明公开了一种防倒流的排水阀结构,通过包括阀体和底座,阀体活动设有阀芯组件和启动组件,所述阀芯组件和所述启动组件联动配合,所述底座设有排水口,驱动所述启动组件以带动所述阀芯组件打开所述排水口进行排水;还包括限位单元,所述排水阀未排水状态时,所述限位单元使得所述阀芯组件限位在关闭所述排水口的位置;驱动所述启动组件进行排水时,所述限位单元解除对所述阀芯组件的限位以使得所述阀芯组件能打开所述排水口;从而使得即使回流水对阀芯组件施加向上的推力,阀芯组件也无法向上运动,污物不会回流至水箱中;启动排水阀开关时,启动组件使得限位件解除对阀芯组件的限位而启动排水阀排水,结构简单,性能稳定。(The invention discloses a backflow-preventing drain valve structure which comprises a valve body and a base, wherein the valve body is movably provided with a valve core assembly and a starting assembly, the valve core assembly is in linkage fit with the starting assembly, the base is provided with a water outlet, and the starting assembly is driven to drive the valve core assembly to open the water outlet for water drainage; the drainage valve also comprises a limiting unit, and when the drainage valve is in a non-drainage state, the limiting unit enables the valve core assembly to be limited at a position for closing the drainage outlet; when the starting assembly is driven to drain water, the limiting unit releases the limiting on the valve core assembly so that the water outlet can be opened by the valve core assembly; therefore, even if the backflow water exerts upward thrust on the valve core assembly, the valve core assembly cannot move upwards, and dirt cannot flow back into the water tank; when the drainage valve switch is started, the starting assembly enables the limiting part to relieve limiting on the valve core assembly and starts the drainage valve to drain water, and the drainage valve switch is simple in structure and stable in performance.)
1. The drain valve structure capable of preventing backflow comprises a valve body (10) and a base (20), wherein the valve body (10) is movably provided with a valve core assembly (30) and a starting assembly (40), the valve core assembly (30) is in linkage fit with the starting assembly (40), the base (20) is provided with a water outlet (23), and the starting assembly (40) is driven to drive the valve core assembly (30) to open the water outlet (23) for draining water; the drainage valve is characterized by further comprising a limiting unit, wherein when the drainage valve is in a non-drainage state, the limiting unit enables the valve core assembly (30) to be limited at a position for closing the drainage outlet (23); when the starting assembly (40) is driven to drain water, the limiting unit releases the limiting on the valve core assembly (30) so that the valve core assembly (30) can open the drainage outlet (23).
2. The drain valve structure against backflow according to claim 1, wherein: the limiting unit comprises a limiting part (50), the limiting part (50) can move between a limiting position and a yielding position, the limiting part (50) is used for limiting the valve core assembly (30) during the limiting position, and the limiting part (50) is used for yielding the valve core assembly (30) during the yielding position.
3. The drain valve structure against backflow according to claim 2, wherein: the limiting piece (50) is driven by the valve core assembly (30) or the starting assembly (40) to move from the limiting position to the abdicating position; locating part (50) by under the effect that resets by the position of stepping down moves to limiting position, it adopts balancing weight (61) or elasticity piece that resets to reset, perhaps, locating part (50) are in under the drive of start-up subassembly (40) by the position of stepping down moves to limiting position.
4. The drain valve structure against backflow according to claim 2, wherein: the limiting piece (50) moves between the limiting position and the yielding position through rotation or sliding; the limiting piece (50) is movably arranged on the valve body (10), or the limiting piece (50) is movably arranged on the valve core assembly (30).
5. The drain valve structure against backflow according to claim 2, wherein: the limiting unit further comprises a swinging block (70) which is arranged on the valve body (10) in a swinging mode, the starting assembly (40) is linked with the valve core assembly (30) through the swinging block (70), the swinging block (70) is in butt fit with the limiting piece (50) to limit the limiting piece (50) at the limiting position, when the starting assembly (40) drives the swinging block (70) to be linked with the valve core assembly (30), the swinging block (70) is not in butt fit with the limiting piece (50) to yield the limiting piece (50), and the valve core assembly (30) can drive the limiting piece (50) to move from the limiting position to the yielding position; or, when the starting assembly (40) drives the swinging block (70) to be linked with the valve core assembly (30), the swinging block (70) drives the limiting part (50) to move from the limiting position to the yielding position.
6. The drain valve structure against backflow according to claim 5, wherein: the limiting piece (50) can be installed on the valve body (10) in a swinging mode, the valve core assembly (30) is provided with a boss (311), the swinging block (70) moves back to the limiting piece (50), and the limiting piece (50) moves up under the thrust action of the boss (311) in a swinging mode.
7. The drain valve structure against backflow according to claim 6, wherein: the valve core assembly (30) comprises a valve rod (31) and a sealing disc (32), and the sealing disc (32) is fixedly arranged at the bottom of the valve rod (31) and is matched with the water outlet (23) in an opening and closing manner; the valve rod (31) is provided with the boss (311), and the limiting piece (50) is provided with a limiting part (52) which is in butt fit with the boss (311).
8. The drain valve structure against backflow according to claim 5, wherein: swing piece (70) with be equipped with linkage inclined plane (73) on one of the two of locating part (50), swing piece (70) with be equipped with traveller (53) on another of the two of locating part (50), swing piece (70) pass through linkage inclined plane (73) with the sliding fit of traveller (53) is in order to drive locating part (50) by limiting position activity extremely give way the position.
9. The drain valve structure against backflow according to claim 4, wherein: the limiting unit further comprises a swinging block (70) which is arranged on the valve body (10) in a swinging mode, the swinging block (70) is linked with the valve core assembly (30), the limiting member (50) is fixed on the swinging block (70), and a swinging axis (74) of the swinging block (70) is located right above the position where the valve core assembly (30) is abutted to the limiting member (50).
10. The drain valve structure against backflow according to claim 1, wherein: in the starting process of the starting assembly (40), a section of idle stroke L is arranged before the valve core assembly (30) is linked; in the movement process of the idle stroke L of the starting assembly (40), the limiting unit releases the limiting on the valve core assembly (30), and the starting assembly (40) moves the idle stroke L and then drives the valve core assembly (30).
11. The drain valve structure against backflow according to claim 1, wherein: the base (20) still be equipped with overflow mouth (21) of outlet (23) intercommunication, overflow mouth (21) department is equipped with overflow mouth baffle (22) that can one-way open, during the water tank overflow, overflow mouth baffle (22) are opened under the pressure of overflow water, perhaps, when the water refluence of outlet (23) department, baffle (22) are closed overflow mouth (21).
Technical Field
The invention relates to a backflow-preventing drain valve structure.
Background
In a toilet flushing device, a toggle or button switch on a water tank is generally operated to open a drain valve in the water tank to open a drain, so that water in the water tank in the toilet is discharged into the toilet through a drain port of the drain valve to flush waste in the toilet into a sewage pipe.
Most toilet tanks are now made lower for aesthetic and space saving purposes. The phenomenon of sewage pipeline blockage sometimes appears in the closestool use, especially for the closestool of low water tank, the phenomenon of blockage appears more easily. After the closestool is blocked, when the closestool dredging tool is used, impurities and dirt in the water storage bay can easily flow back to the water tank of the closestool, so that water in the water tank is polluted.
Disclosure of Invention
The invention provides a backflow-preventing drain valve structure for solving the problems, and the backflow-preventing limit unit is arranged to solve the hidden danger of sewage backflow in a toilet water channel; in particular to solve the hidden trouble of sewage backflow when dredging the water channel of the toilet under the condition of toilet blockage of a low water tank. The structure is simple, reliable, easy to realize and obvious in effect.
In order to achieve the purpose, the invention adopts the technical scheme that:
the drain valve structure capable of preventing backflow comprises a valve body (10) and a base (20), wherein the valve body (10) is movably provided with a valve core assembly (30) and a starting assembly (40), the valve core assembly (30) is in linkage fit with the starting assembly (40), the base (20) is provided with a water outlet (23), and the starting assembly (40) is driven to drive the valve core assembly (30) to open the water outlet (23) for draining water; the drainage valve further comprises a limiting unit, and when the drainage valve is in a non-drainage state, the limiting unit enables the valve core assembly (30) to be limited at a position for closing the drainage outlet (23); when the starting assembly (40) is driven to drain water, the limiting unit releases the limiting on the valve core assembly (30) so that the valve core assembly (30) can open the drainage outlet (23).
Preferably, the limiting unit comprises a limiting part (50), the limiting part (50) can move between a limiting position and a yielding position, the limiting part (50) limits the valve core assembly (30) when the limiting position is reached, and the limiting part (50) yields the valve core assembly (30) when the yielding position is reached.
Preferably, the limiting member (50) is driven by the valve core assembly (30) or the starting assembly (40) to move from the limiting position to the abdicating position; locating part (50) by under the effect that resets by the position of stepping down moves to limiting position, it adopts balancing weight (61) or elasticity piece that resets to reset, perhaps, locating part (50) are in under the drive of start-up subassembly (40) by the position of stepping down moves to limiting position.
Preferably, the limiting part (50) moves between the limiting position and the abdicating position through rotation or sliding; the limiting piece (50) is movably arranged on the valve body (10), or the limiting piece (50) is movably arranged on the valve core assembly (30).
Preferably, the limiting unit further comprises a swinging block (70) which is swingably connected to the valve body (10), the starting assembly (40) is linked to the valve core assembly (30) through the swinging block (70), the swinging block (70) is in butt fit with the limiting member (50) to limit the limiting member (50) at the limiting position, when the starting assembly (40) drives the swinging block (70) to link with the valve core assembly (30), the swinging block (70) loses butt with the limiting member (50) to yield the limiting member (50), and the valve core assembly (30) can drive the limiting member (50) to move from the limiting position to the yielding position; or, when the starting assembly (40) drives the swinging block (70) to be linked with the valve core assembly (30), the swinging block (70) drives the limiting part (50) to move from the limiting position to the yielding position.
Preferably, the limiting member (50) can be attached to the valve body (10) in a swinging mode, the valve core assembly (30) is provided with a boss (311), and after the swinging block (70) gives way to the limiting member (50), the limiting member (50) gives way in an upward swinging mode under the thrust action of the boss (311).
Preferably, the valve core assembly (30) comprises a valve rod (31) and a sealing disc (32), and the sealing disc (32) is fixedly arranged at the bottom of the valve rod (31) and is matched with the water outlet (23) in an opening and closing manner; the valve rod (31) is provided with the boss (311), and the limiting piece (50) is provided with a limiting part (52) which is in butt fit with the boss (311).
Preferably, swing piece (70) with be equipped with linkage inclined plane (73) on one of the two of locating part (50), swing piece (70) with be equipped with traveller (53) on another of the two of locating part (50), swing piece (70) pass through linkage inclined plane (73) with the sliding fit of traveller (53) is in order to drive locating part (50) by limiting position activity extremely the position of stepping down.
Preferably, the limiting unit comprises a swinging block (70) which is installed on the valve body (10) in a swinging mode, the swinging block (70) is linked with the valve core assembly (30), the limiting member (50) is fixed on the swinging block (70), and a swinging axis (74) of the swinging block (70) is located right above a position where the valve core assembly (30) is abutted to the limiting member (50).
Preferably, during the opening process of the starting assembly (40), a section of idle stroke L is provided before the valve core assembly (30) is linked; in the movement process of the idle stroke L of the starting assembly (40), the limiting unit releases the limiting on the valve core assembly (30), and the starting assembly (40) moves the idle stroke L and then drives the valve core assembly (30).
Preferably, the base (20) is further provided with an overflow port (21) communicated with the water outlet (23), an overflow port baffle (22) capable of being opened in a single direction is arranged at the overflow port (21), the overflow port baffle (22) is opened under the pressure of overflow water when the water tank overflows, or the overflow port (21) is closed by the baffle (22) when water at the water outlet (23) flows backwards.
The invention has the beneficial effects that:
(1) by adding the limiting unit on the drain valve, when the drain valve is not started, the limiting unit enables the valve core assembly to be limited at the position for closing the drain outlet, so that even if the backflow water exerts upward thrust on the valve core assembly, the valve core assembly cannot move upwards, and dirt cannot flow back into the water tank; when the starting assembly is driven to drain, the limiting unit relieves the limiting on the valve core assembly so that the valve core assembly can open the water outlet to start the drain valve to drain, and the water draining device is simple in structure, stable in performance and reliable in function;
(2) the starting assembly and the limiting piece are in linkage fit, the limiting piece is driven by the swinging block, so that the limiting piece moves from the limiting position to the yielding position through rotation or sliding, and the control is more flexible;
(3) the valve core assembly and the limiting piece are in linkage fit, the boss is arranged on the valve core assembly, and the limiting piece is driven to move from the limiting position to the abdicating position through the boss, so that the structure is more reliable;
(4) in the starting process of the starting assembly, a section of idle stroke is arranged before the valve core assembly is linked, so that the limiting unit is used for relieving limiting on the valve core assembly before the valve core assembly moves upwards, and smooth action is guaranteed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a perspective view of a backflow prevention drain valve structure according to a first embodiment of the present invention;
fig. 2 is a sectional view of a backflow prevention drain valve structure according to a first embodiment of the present invention;
fig. 3 is an exploded view showing a structure of a backflow prevention drain valve according to a first embodiment of the present invention;
fig. 4 is an initial state cross-sectional view of the backflow prevention drain valve structure according to the first embodiment of the present invention (a state where the drain valve is not opened to drain, and the swinging block limits the limiting member at the limiting position);
fig. 5 is a sectional view showing a drainage state of the backflow prevention drain valve structure according to the first embodiment of the present invention (a state where the drain valve is opened to drain water, and the swing block swings open to give way to the limiting member);
fig. 6 is an initial state cross-sectional view of a backflow prevention drain valve structure according to a second embodiment of the present invention (a state where the drain valve is not opened to drain, and the swinging block limits the limiting member at a limiting position);
fig. 7 is a sectional view of a drainage state of a backflow-preventing drain valve structure according to a second embodiment of the present invention (a state in which the drain valve is opened to drain water, and the swing block drives the limiting member to rotate to the receding position);
fig. 8 is an exploded view of a backflow prevention drain valve structure according to a third embodiment of the present invention;
fig. 9 is an initial state sectional view of a backflow prevention drain valve structure according to a third embodiment of the present invention (a state where the drain valve is not opened to drain, and the limiting member is at a limiting position);
fig. 10 is a sectional view showing a water discharge state of the backflow prevention drain valve structure according to the third embodiment of the present invention (a state where the stopper is released from the stopper and starts to be actuated);
fig. 11 is a sectional view showing a drainage state of the backflow prevention drain valve structure according to the third embodiment of the present invention (a state where the drain valve is opened to drain water, and the limiting member is at the position of yielding);
in the figure:
10-a valve body;
20-a base; 21-an overflow port; 22-overflow baffle; 23-a water outlet;
30-a spool assembly; 31-a valve stem; 311-boss; 32-sealing disk; 33-a floating barrel; 331-a swing rod;
40-a starting assembly; 41-a wire rope assembly; 411-fastener;
50-a limit piece; 51-abutted portions; 52-a limiting part; 53-a traveler;
a 60-C shaped snap ring; 61-a counterweight or elastic return member;
70-a swing block; 71-an abutment; 72-lifting the rod; 73-linkage slope; 74-axis of oscillation.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention clearer and clearer, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
First embodiment
As shown in fig. 1 to fig. 5, the backflow-preventing drain valve structure of the present embodiment includes a
In this embodiment, the limiting unit includes a
The limiting
In other embodiments, the
the
as shown in fig. 1 and 2, the starting
As shown in fig. 3, the
As shown in fig. 3, in this embodiment, the
As shown in fig. 2, 4 and 5, the
In this embodiment, in the starting process of the starting
The working principle of the embodiment is briefly described as follows:
as shown in fig. 4, in the initial state, the
when sewage and dirt flow back, the
As shown in fig. 5, when the drain switch (not shown) is activated, the wire rope assembly 41 pulls the
When the water in the water tank overflows, the
Second embodiment
As shown in fig. 6 and 7, the main difference between the present embodiment and the first embodiment is that: in this embodiment, when the starting
In this embodiment, the limiting unit further includes a swinging
In this embodiment, in the starting process of the starting
The operating principle of this embodiment differs from that of the first embodiment mainly in that:
as shown in fig. 6, in the initial state, the linking
The rest of the structure and the operation principle of this embodiment are similar to those of the first embodiment, and are not described herein again.
Third embodiment
As shown in fig. 8 to 11, the main difference between the present embodiment and the first embodiment is: in this embodiment, the starting
The operating principle of this embodiment differs from that of the first embodiment mainly in that:
as shown in fig. 9, in the initial state, the limiting
The rest of the structure and the operation principle of this embodiment are similar to those of the first embodiment, and are not described herein again.
It should be noted that, in other embodiments, the limiting member may be movably disposed on the
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
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