CN109505335B

CN109505335B - Drain valve

Info

Publication number: CN109505335B
Application number: CN201811478752.3A
Authority: CN
Inventors: 胡诗明; 唐亚平
Original assignee: Xiamen R&j Precision Technology Co ltd
Current assignee: Xiamen R&j Precision Technology Co ltd
Priority date: 2018-12-05
Filing date: 2018-12-05
Publication date: 2024-03-22
Anticipated expiration: 2038-12-05
Also published as: CN109505335A

Abstract

The invention relates to a drain valve, which relates to the technical field of toilet drainage and comprises a base, a hydraulic driving mechanism, a water stopping control mechanism and a water level control mechanism, wherein a valve port for drainage is arranged on the base, the water stopping control mechanism is used for opening and closing the valve port, the hydraulic driving mechanism is in hooking fit and unhooking fit with the water stopping control mechanism under the hydraulic action so as to enable the water stopping control mechanism to open and close the valve port, the water level control mechanism is in hooking fit with the water stopping control mechanism when the water level is high so as to limit the water stopping control mechanism to close the valve port, and the water level control mechanism is in unhooking fit with the water stopping control mechanism when the water level is low so as to release the limit of closing the valve port by the water stopping control mechanism. The invention realizes the function of closing the valve port of the drain valve in a delayed way through the hydraulic drive and the hooking or unhooking cooperation of each mechanism according to the change of the hydraulic pressure and the water level.

Description

Drain valve

Technical Field

The invention relates to the technical field of toilet drainage, in particular to a drainage valve.

Background

In the traditional control method, the driving piece is controlled to enable the flap to be far away from the base, so that the drain hole is opened, and water in the water tank is flushed out through the drain hole to realize flushing; the release driving piece is used for controlling, the flap cover is driven by the suction force of discharged water to quickly fall down for resetting, and the drain hole is quickly closed, so that the flushing time is short, and the problems of insufficient water discharge amount and insufficient water impact force exist.

Disclosure of Invention

In view of the above problems, the present invention aims to provide a drain valve, which realizes the function of closing the valve port of the drain valve in a delayed manner through the interaction of two hooking components.

The specific scheme is as follows:

a drain valve, comprising: the hydraulic control mechanism is in hooking fit or unhooking with the water stop control mechanism under the hydraulic action, so that the water stop control mechanism is in hooking fit with the water stop control mechanism when the water level is high so as to limit the water stop control mechanism to close the valve port, and the water level control mechanism is unhooked with the water stop control mechanism when the water level is low so as to release the limit of closing the valve port by the water stop control mechanism.

Further, the hydraulic driving mechanism comprises a hydraulic driving assembly and a first hooking assembly, the water level control mechanism is a second hooking assembly, the water stop control mechanism comprises a first hooking and a second hooking, the hydraulic driving assembly controls the first hooking assembly to be hooked or unhooked with the first hooking of the water stop control mechanism under the hydraulic action, and the second hooking assembly is hooked or unhooked with the second hooking along with the change of the water level; and after the first hooking component is unhooked from the first hook, the second hooking component is hooked with the second hook.

Further, the base is provided with the water stop control mechanism, the water stop control mechanism further comprises a water stop main body and a water stop valve clack arranged on the water stop main body and used for being in airtight fit with the valve port, and the first hook and the second hook are arranged on the water stop main body.

Further, the hydraulic driving assembly comprises a driving rod capable of performing reciprocating motion between a first position and a second position, the driving rod is connected with the first hooking assembly, the position close to the first hooking assembly is set to be the first position, and the position far away from the first hooking assembly is set to be the second position.

The first hook assembly comprises a first assembly main body, a third hook piece and a hook elastic piece, wherein the third hook piece is used for hooking the first hook, the third hook piece is movably connected to the first assembly main body, the position of the third hook piece, which is in hook fit with the first hook, is a first hook position, the position of the third hook piece, which is in hook fit with the first hook, is a first unhook position, and the hook elastic piece applies acting force from the first unhook position to the first hook position to the third hook piece.

The first assembly main body is connected with the driving rod, the third hook piece is hooked with the first hook in the stroke of the driving rod from the second position to the first position, and the third hook piece is unhooked with the first hook in the stroke of the driving rod from the first position to the second position.

Further, the second hooking component comprises a second component main body, a fourth hooking member for hooking the second hook and a water level control unit, wherein the fourth hooking member is fixedly connected to the second component main body, the position of hooking the fourth hooking member and the second hook is a second hooking position, the position of unhooking the fourth hooking member and the second hook is a second unhooking position, when the water level control unit is at a high water level, the fourth hooking member is at the second hooking position and is hooked with the second hook, and when the water level control unit is at a low water level, the fourth hooking member is at the second unhooking position and unhooked from the second hook.

Further, the first component main body of the first hooking component comprises a connecting through hole, the third hooking member is pivoted to the first component main body so as to rotate around the connecting through hole, the hooking elastic member is a torsion spring, and the torsion spring acts on the third hooking member so that the third hooking member is always acted on from a first unhooking position to a first hooking position.

Further, the first component main body of the first hooking component comprises a connecting rod, the hooking elastic element is a spring, the third hooking element is slidably connected to the connecting rod so as to linearly slide along the connecting rod, and the spring acts on the third hooking element so that the third hooking element is always acted on from a first unhooking position to a first hooking position.

Further, the water stop main body of the water stop control mechanism is a hollow cylindrical body, the first hook is arranged on the inner wall of the water stop main body, the second hook is arranged on the outer wall of the water stop main body, and the water stop valve clack is arranged at the end part of the water stop main body.

Further, the base comprises a first part and a second part, the first part and the second part are hollow cylindrical bodies which are communicated with each other, the outer wall of the first part comprises a connecting part which is used for being connected with a pipeline, the second part is used for installing the water stop control mechanism, and the second part is provided with a hollowed-out part which is used for water inflow.

Further, the inner diameter of the second part is larger than that of the first part, and a stepped surface is formed by the inner diameter difference to form the valve port.

Further, the water level control unit of the second hooking component comprises a water tank, a floating body arranged in the water tank, a water level control unit seat body and a pivoting support arranged on the water level control unit seat body, wherein the second component main body comprises a first end connected with the floating body, a middle end used for being pivoted with the pivoting support and a second end fixedly connected with the fourth hooking member.

The water level control unit seat body is provided with a hollow yielding channel and a bottom, the yielding channel can accommodate the first hooking component to pass through, and the bottom is used for limiting the water stop valve clack so that the third hooking component is unhooked with the first hooking component in the stroke of the driving rod from the first position to the second position.

Further, the hydraulic drive assembly includes: the hydraulic cylinder is provided with a cylinder body, the cylinder body is internally provided with a piston capable of reciprocating along the axial direction of the hydraulic cylinder, the directions of the two ends in the axial direction are defined to be a first direction and a second direction respectively, the elastic element applies force to the piston towards the first direction, the cylinder body is provided with a limiting part at a first position, the piston is limited to the first position by the limiting part under the action of the elastic element, the cylinder body is also provided with an inlet and an outlet, the inlet is configured to enable liquid to enter the cylinder body to push the piston to move from the first position towards the second direction, the piston moves to the second position under the action of the pressure of the liquid entering the cylinder body, the outlet is arranged at one end of the second position of the cylinder body towards the second direction, the piston is connected with the piston rod penetrating out of the cylinder body, and the piston drives the piston rod to reciprocate under the movement of the first position and the second position.

According to the technical scheme, the function of closing the valve port of the drain valve in a delayed mode is achieved through hydraulic driving and hooking or unhooking of the mechanisms according to the change of hydraulic pressure and water level, and the lowest water level in the water tank can be accurately controlled.

Drawings

Fig. 1 is a schematic two-dimensional structure of an embodiment of the present invention.

Fig. 2 is a schematic three-dimensional structure of this embodiment.

Fig. 3 is a schematic view showing a two-dimensional structure of the hydraulic drive assembly in this embodiment.

Fig. 4 is a schematic three-dimensional structure of the hydraulic drive assembly in this embodiment.

Fig. 5 is a schematic view showing the structure of the water stopping control mechanism of this embodiment.

Fig. 6 is a schematic view showing the structure of the base in this embodiment.

Fig. 7 is a schematic structural view of a second hooking component in this embodiment.

Fig. 8 shows a schematic structure of the floating body in this embodiment.

Fig. 9 is a schematic structural view of the second assembly main body in this embodiment.

Fig. 10 is a schematic view showing a part of the structure of the third hook member and the first hook in this embodiment when they are hooked to and unhooked from each other.

Fig. 11 is a schematic view showing a first configuration of the first hooking component in this embodiment.

Fig. 12 is a schematic view showing a first structure of the first hooking component in this embodiment from the first hooking position to the first unhooking position.

Fig. 13 is a schematic view showing a second structure of the first hooking component in this embodiment.

Fig. 14 is a schematic view showing a second structure of the first hooking component from the first hooking position to the first unhooking position in this embodiment.

Fig. 15 (a) is a schematic view showing the structure in the initial position in this embodiment.

Fig. 15 (b) is a schematic structural view showing another view angle in the initial position in this embodiment.

Fig. 16 (a) is a schematic view showing the structure when the third hook is unhooked from the first hook in this embodiment.

Fig. 16 (b) is a schematic structural view showing another view angle when the third hook is unhooked from the first hook in this embodiment.

Fig. 17 (a) is a schematic view showing the structure when the fourth hook is unhooked from the second hook in this embodiment.

Fig. 17 (b) is a schematic structural view showing another view angle when the fourth hook is unhooked from the second hook in this embodiment.

Fig. 18 (a) is a schematic view showing the structure of the valve port in this embodiment when closed.

Fig. 18 (b) is a schematic view showing the structure of the valve port in this embodiment from another view angle.

Fig. 19 is a schematic view showing a part of the structure of the fourth hook member and the second hook member in this embodiment when they are hooked to each other.

Fig. 20 is a schematic view showing the structure of the second component body when the fourth hook member and the second hook are two links from unhooking to hooking in this embodiment.

Detailed Description

For further illustration of the various embodiments, the invention is provided with the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments and together with the description, serve to explain the principles of the embodiments. With reference to these matters, one of ordinary skill in the art will understand other possible embodiments and advantages of the present invention.

The invention will now be further described with reference to the drawings and detailed description.

As shown in fig. 1 to 20, a first embodiment of the present invention provides a drain valve, including: the hydraulic drive assembly 1, the base 2, the water stop control mechanism 5, the first hooking assembly 3 and the second hooking assembly 4.

In this embodiment, the drain valve is used in a water tank of a toilet bowl for controlling the toilet bowl to flush.

The drain valve is made of a hard material such as metal, hard plastic, etc., and in this embodiment, since the drain valve is applied to a water tank of a toilet, plastic is preferably used for light weight and corrosion resistance.

(1) First, the structure of the base 2 will be described:

the base 2 may be provided with a corresponding common base according to an application scenario of a drain valve, in this embodiment, the drain valve is applied to a water tank drain of a toilet bowl, so a specific structure of the base 2 is shown in fig. 6, the base 2 includes a first portion 22 and a second portion 23, the first portion 22 and the second portion 23 are hollow cylindrical bodies that are mutually communicated, an external shape can be set according to an installation requirement, in this embodiment, it is preferable to set the first portion 22 and the second portion 23 to be cylinders with different internal diameters, an outer wall of the first portion 22 includes a connection portion, such as a threaded connection portion, for connection with a drain pipe of the toilet bowl, the second portion 23 is used for installing the water stop control mechanism 5 (as can be seen in fig. 1), and the second portion 23 has a hollowed portion 231 for water inlet, and a size of the hollowed portion 231 can be used for controlling a speed of the drain valve drain. After entering from the hollow 231, water is discharged from the valve port 21, and the valve port 21 can be closed by providing a water stop valve flap 52 (as can be seen in fig. 1) with an outer diameter larger than that of the valve port 21.

With continued reference to fig. 6, in this embodiment, the valve port 21 is disposed in such a manner that the second portion 23 has an inner diameter larger than that of the first portion 22, and a stepped surface is formed by the difference in inner diameters, so that the valve port 21 is formed. Other valve port configurations are possible by those skilled in the art, such as a centrally-projecting valve port 21 on the inner wall of the first portion 22.

(2) The structure of the water stop control mechanism 5 is described below:

with continued reference to fig. 1, the water stop control mechanism 5 is disposed in the base 2, and the specific structure of the water stop control mechanism 5 is shown in fig. 5, and includes a water stop main body 51, where the water stop main body 51 is provided with a water stop valve clack 52 for sealing cooperation with the valve port 21, and is provided with a first hook 54 (as shown in fig. 10) and a second hook 53. In this embodiment, in order to facilitate the arrangement of the first hook 54 and the second hook 53, the water-stopping main body 51 is provided as a hollow barrel, may be a cylinder, a square barrel or other shapes, in this embodiment, a hollow cylinder is adopted, the first hook 54 is provided on the inner wall of the water-stopping main body 51, the second hook 53 is provided on the outer wall of the water-stopping main body 51, the water-stopping valve flap 52 is provided on the end of the water-stopping main body 51, and the water-stopping control mechanism 5 can reciprocate along the axial direction of the base 2, so as to open or close the valve port 21 of the base 2.

(3) The structure of the hydraulic drive assembly 1 is described below:

the hydraulic driving assembly 1 may be a conventional hydraulic driving assembly, i.e. hydraulic pressure may be used to control the opening and closing of the drain valve.

In order to accurately control the moving position of the piston rod 12 and pre-press the water stop control mechanism 5 of the drain valve to prevent the sewage in the toilet from flowing backwards, in this embodiment, the hydraulic driving assembly 1 comprises a hydraulic cylinder, a piston rod 12, a piston 13 and an elastic element 14, and the specific structure of the hydraulic driving assembly 1 is shown with reference to fig. 3. The hydraulic cylinder has a cylinder body 11, the cylinder body 11 has the piston 13 capable of reciprocating along the axial direction of the cylinder body 11, the directions toward both ends in the axial direction are defined as a first direction and a second direction, which are both directions parallel to the axis, in fig. 3, the downward direction is the first direction, and the upward direction is the second direction. The elastic element 14 applies a force to the piston 13 in the first direction (i.e. downwards). The piston 13 is connected with the piston rod 12 penetrating from the cylinder 11, and the piston 13 drives the piston rod 12 to reciprocate under the reciprocating motion of the first position 132 and the second position 133. In this embodiment, the specific position of the first position 132 may be shown with reference to fig. 15, and the specific position of the second position 133 may be shown with reference to fig. 17.

The elastic element 14 may be a conventional elastic element such as a spring, damping oil, hard rubber, etc., which in this embodiment is provided as a spring.

In this embodiment, the cylinder body 11 of the hydraulic cylinder includes a top cover 111, a side wall 112, and a bottom cover 113, one end of the side wall 112 is detachably connected to the top cover 111, and the other end is fixedly connected to the bottom cover 113, so for the hydraulic cylinder, the first direction is a direction in which the bottom cover 113 is located, and the second direction is a direction in which the top cover 111 is located.

The piston rod 12 is disposed at one end of the piston 13 facing the first direction, a through hole 114 for the piston rod 12 to pass through is disposed on the bottom cover 113, one end of the elastic element 14 is fixedly connected to the top cover 111, and the other end is fixedly connected to the piston 13.

The cylinder 11 has a limit portion at the first position 132, the limit portion is used for limiting the limit position of the piston 13 moving under the action of the elastic force of the elastic element 14, the piston 13 is limited to the first position 132 by the limit portion under the action of the elastic element 14, and the limit portion may be additionally installed, or may be directly formed integrally by the cylinder 11 according to the position of the first position 132, for example, the bottom cover 113 of the cylinder 11 is used as the limit portion.

The cylinder is further provided with an inlet 15 and an outlet 16, the inlet 15 being configured to enable liquid to enter the cylinder 11 to push the piston 13 from the first position 132 towards the second direction, the piston 13 being moved to the second position 133 under the pressure of the liquid entering the cylinder 11, the outlet 16 being provided at one end of the cylinder 11 towards the second direction, i.e. the part of the cylinder above the second position 133 in fig. 3, the outlet 16 being adapted to expel air or liquid from the cylinder 11 above the piston 13 from the outlet 16 when the piston 13 is moved from the first position 132 towards the second direction.

In this embodiment, for convenience of manufacture, the outlets 16 may be disposed at the connection between the top cover 111 and the side wall 112, and the number of the outlets 16 may be one or more, or may be disposed at the top end of the side wall by a person skilled in the art.

In this embodiment, the outlet 16 is disposed at the second position 133 of the cylinder 11, that is, the connection between the top cover 111 and the side wall 112 is located at the second position 133, when the piston 13 moves to the second position 133, the liquid in the cylinder 11 just flows out from the outlet 16, and at this time, the forward pressure (the liquid entering through the inlet 15 is applied), the reverse pressure (the liquid flowing out through the outlet 16 is applied) of the liquid, and the elastic force of the elastic element 14 are balanced, so that the liquid flows out from the outlet 16 better, and the liquid guiding groove 19 is disposed on the inner wall of the side wall 112 of the cylinder 11, which is located on the side of the outlet 16 near the bottom cover 113. During the movement of the piston 13, the liquid can flow into the outlet 16 from the liquid guiding groove 19 when the piston moves to the liquid guiding groove 19, so that the efficiency of liquid outflow is improved.

The selection of the elastic element 14 is related to the specific position of the second position 133, and when the elastic force of the elastic element 14 is larger, the position of the second position 133 is closer to the first position, and when the elastic force of the elastic element 14 is smaller, the position of the second position 133 is further from the first position, so that a person skilled in the art needs to select an appropriate elastic element 14 in combination with the actually required movement distance.

The inlet 15 may be directly disposed on the bottom cover 113 or may be disposed on the side wall 112, when disposed on the bottom cover 113, the bottom cover 113 may directly serve as a limiting portion, and when disposed on the side wall 112, a further limiting portion is required, in this embodiment, the inlet 15 is disposed at an end of the side wall 112 near the bottom cover 113 for installation and structural rationality.

In order to prevent the liquid in the hydraulic cylinder from flowing out of the gap between the through hole 114 and the piston rod 12, in the prior art, a sealing ring is usually disposed at the connection position between the cylinder body 11 and the piston rod 12, in this embodiment, for better sealing, the bottom cover 113 of the cylinder body 11 extends to the top cover 111 at the edge of the through hole 114 to form a first sealing part 17, and the first sealing part 17 is preferably hollow and cylindrical, and has an inner diameter identical to the aperture of the through hole 114, and the first sealing part 17 can deform and press the piston rod 12 under the hydraulic action in the hydraulic cylinder. With the above arrangement, when liquid enters the hydraulic cylinder, pressure is applied to the first sealing portion 17, and the first sealing portion 17 is tightly attached to the piston rod 12 under the action of the pressure, so that a better sealing effect is obtained.

The thickness of the first sealing portion 17 can be set by a person skilled in the art according to practical situations, and the deformation under the hydraulic action in the hydraulic cylinder needs to be satisfied, in this embodiment, considering that the deformation portion of the first sealing portion 17 is the farther from the through hole 114, the larger the deformation amount is, therefore, the thickness of the first sealing portion 17 is preferably set to gradually decrease from the end close to the through hole 114 to the end far from the through hole 114 in this embodiment, by the above setting, the smaller the thickness is, the larger the deformation amount is, the larger the thickness is at the position close to the through hole 114, the strength of the first sealing portion 17 is ensured, and the smaller the thickness is at the position far from the through hole 114, so that the good sealing effect is ensured. Of course, the person skilled in the art can also set the thickness to be always the same.

In order to better enhance the sealing effect, in this embodiment, it is preferable that the first sealing portion 17 is provided to form a sealing ring 171 protruding inward toward the hollow at the end closest to the top cover 111.

Since the hydraulic pressure directly impacts the first sealing portion 17 affects the service life of the first sealing portion 17, in order to avoid this effect, it is preferable to provide the inside of the cylinder 11 further including a cylindrical stopper 18 provided on the bottom cover 113 between the first sealing portion 17 and the side wall 112 and coaxially provided with the through hole 114. For blocking liquid entering from the inlet 15. The liquid entering between the first seal 17 and the barrier 18 may exert sufficient pressure on the first seal 17 to cause the first seal 17 to closely conform to the piston rod 12. With the above arrangement, the liquid coming in at the inlet 15 of the hydraulic cylinder is blocked by said blocking member 18 and cannot directly act on the first sealing portion 17. Since the liquid coming in from the inlet 15 needs to flow in from the gap between the side wall 112 and the barrier 18, a distance between the barrier 18 and the cylinder is also required. In order that the blocking member 18 can completely block the liquid impinging on the first sealing portion 17, it is therefore preferable in this embodiment to provide the blocking member 18 to have a height higher than that of the first sealing portion 17, in which case the blocking member 18 may serve as a stopper. Note that, the height of the blocking member 18 and the first sealing portion 17 mentioned above is the length of the cylinder.

In order to improve the tightness between the piston 13 and the hydraulic cylinder, in this embodiment, it is preferable to provide that an end of the piston 13 near the bottom cover 113 includes a second sealing portion 131, where the second sealing portion 131 is in a thin-walled cylinder shape, and has an outer diameter slightly smaller than an inner diameter of the cylinder 11, and forms a clearance fit with an inner wall of the cylinder 11, and the second sealing portion 131 is capable of being deformed by hydraulic pressure in the hydraulic cylinder so as to abut against the inner wall of the hydraulic cylinder. Through the arrangement, when liquid enters the hydraulic cylinder, pressure is applied to the second sealing part 131, and the second sealing part 131 clings to the inner wall of the hydraulic cylinder under the action of the pressure, so that a better sealing effect is obtained.

In order to move the piston rod 12 in the axial direction without shifting the position, in this embodiment, a guide assembly defining the movement direction of the piston rod 12 is preferably provided, and the guide assembly may be provided on the outside of the piston rod 12 or may be provided inside the piston rod 12, in this embodiment, preferably provided inside, specifically, the piston rod 12 is provided as a hollow rod member, the guide assembly is a guide rod 115 fixedly provided on the top cover 111 and provided in the hollow of the piston rod 12, and the piston rod 12 and the guide rod 115 are in clearance fit, by which the movement direction of the piston rod 12 can be well defined.

(4) The structure of the first hooking assembly 3 is described below:

with continued reference to fig. 1, the lower end of the piston rod 12 is connected to the first hooking component 3, and the specific structure of the first hooking component 3 is shown in fig. 11, and includes a first component main body 31, a third hooking member 33 for hooking the first hook 54, and a hooking elastic member 32, where the third hooking member 33 is movably connected to the first component main body 31, a position where the third hooking member 33 is hooked with the first hook 54 is a first hooking position 34 (refer to the left diagram of fig. 10 and 12), a position where the third hooking member 33 is disengaged from the first hook 54 is a first unhooking position 35 (refer to the right diagram of fig. 10 and 12), and the hooking elastic member 32 applies a force from the first unhooking position 35 to the first hooking position 34 to the third hooking member 33, so that the third hooking member 33 always has a tendency to move toward the first hooking position 34. Referring to fig. 10, the first assembly body 31 is connected to the piston rod 12, and the third hooking member 33 is hooked with the first hooking member 54 (as shown in the left view of fig. 10) in the course of the movement of the piston rod 12 from the second position 133 toward the first position 132, and the third hooking member 33 is unhooked with the first hooking member 54 (as shown in the right view of fig. 10) in the course of the movement of the piston rod 12 from the first position 132 toward the second position 133.

The following list two possible configurations of the first hooking component 3:

(1) Referring again to fig. 11, the first assembly body 31 includes a connection through hole 311, the hooking elastic element 32 is a torsion spring, and the third hooking element 33 is pivotally connected to the first assembly body 31 so as to rotate around the connection through hole 311, and the torsion spring acts on the third hooking element 33, so that the third hooking element 33 is always acted on by a force from the first unhooking position 35 to the first hooking position 34.

(2) Referring again to fig. 13, the first assembly body 31 includes a connecting rod 312, the hooking elastic element 32 is a spring, the third hooking element 33 is slidably connected to the connecting rod 312 to slide linearly along the connecting rod 312, and the spring acts on the third hooking element 33 to make the third hooking element 33 always receive a force from the first unhooking position 35 to the first hooking position 34.

(5) The structure of the second hooking assembly 4 is described below:

referring to fig. 7, the second hooking assembly 4 includes a second assembly body 42, a fourth hooking member 43 for hooking the second hook 53, and a water level control unit 41. The fourth hook member 43 is fixedly connected to the second assembly main body 42, a position where the fourth hook member 43 is in hooking engagement with the second hook 53 is a second hooking position, a position where the fourth hook member 43 is out of hooking engagement with the second hook 53 is a second unhooking position, as shown in fig. 19, when the water level control unit 41 is at a high water level, the fourth hook member 43 is at the second hooking position and is hooked with the second hook 53 (as shown in fig. 19 left), and when the water level control unit 41 is at a low water level, the fourth hook member 43 is at the second unhooking position and is unhooked with the second hook 53 (as shown in fig. 19 right).

With continued reference to fig. 7, the water level control unit 41 of the second hooking component 4 includes a water tank 411, a floating body 412 disposed in the water tank 411, a water level control unit seat 413, and a pivot bracket 414 disposed on the water level control unit seat 413.

The water tank 411 in this embodiment is the same as in the prior art, i.e. is used to hold the float 412 to control the water level in the tank. The specific structure is as follows: the water tank 411 comprises a side wall and a bottom, wherein the side wall and the bottom are fixedly connected to form a cavity for accommodating the floating body 412 and limiting the moving direction of the floating body, the side wall also comprises a water level hole 411a parallel to the axial direction, and water in the water tank arranged outside the hydraulic drainage valve enters the water tank 411 through the water level hole 411a so that the water levels of the two are kept consistent.

With continued reference to fig. 7, since the piston rod 12 needs to pass through the water stop control unit seat 413 during the process of driving the water stop control mechanism 5 to move, the water stop control unit seat 413 further includes a hollow yielding channel 413a, and the yielding channel 413a can enable the driving rod of the hydraulic driving assembly 1, the first hooking assembly 3 and the water stop main body 42 of the water stop control mechanism 4 to pass through.

In addition, since the third hooking member 33 of the first hooking assembly 3 cannot always hook with the first hook 54 of the water stop control mechanism 5, but needs to be unhooked at two positions, in this embodiment, the water level control unit housing 413 is set to further include a bottom 413b for restricting the water stop valve flap 52 of the water stop control mechanism 5 so that the third hooking member 33 is unhooked from the first hook 54 in the stroke of the piston 13 of the hydraulic driving assembly 1 moving from the first position 132 toward the second position 133.

Referring to fig. 9, the second module body 42 includes a first end 421 connected to the floating body 412, a middle end 422 for pivotally connecting to the pivot bracket 414, and a second end 423 fixedly connected to the fourth hooking member 43.

The second hooking component 4 has a function of hooking or unhooking the fourth hooking member 43 with the second hooking member 53 according to the change of the water level, so that the second component main body 42 of the second hooking component 4 can be realized by various common mechanical structures such as a single rod, two connecting rods, three connecting rods, etc., and referring to fig. 20, a schematic diagram of a two-connecting rod structure is shown, and in this embodiment, a single rod structure is preferred for simplicity of structure. Since the floating body 412 in the water level control unit 41 moves in the vertical direction, and the second hook 53 that needs to be hooked with the fourth hook member 43 is located on the outer wall of the water stop main body 51, the movement direction of the fourth hook member 43 is near the horizontal direction, and in order to achieve this function, and in combination with the water level control requirement, the second assembly main body 42 is configured to have an "L" shape, and the middle inflection point of the "L" shape is pivotally connected to the pivot bracket 414.

Since the water stop control mechanism 5 needs to slowly close the valve port 21 of the base 2 after the third hooking member 33 is unhooked from the first hooking member 54, the fourth hooking member 43 is hooked to the second hooking member 53 after the third hooking member 33 is unhooked from the first hooking member 54, in this embodiment, when the third hooking member 33 is unhooked from the first hooking member 54, the fourth hooking member 43 is located below the second hooking member 53, as shown in fig. 16 (a).

Referring to fig. 15 to 18, the operation of the drain valve includes the following steps:

(1) Initial state: as shown in fig. 15 (a) and 15 (b), the water level in the water tank is at a high water level, and the drain valve is in an initial state, that is: the water stop valve clack 52 of the water stop control mechanism 5 is in airtight fit with the valve port 21 of the base 2, the piston rod 12 in the hydraulic driving assembly 1 is located at a first position 132, the third hook member 33 of the first hook assembly 3 is located below the first hook 54 of the water stop control mechanism 5, and the buoyancy of the floating body 412 in the water level control unit 41 is greater than gravity, so that the fourth hook member 43 is located at an initial position.

(2) As shown in fig. 16 (a) and 16 (b), when water is required to be drained, the hydraulic driving assembly 1 is acted by hydraulic force, the piston rod 12 in the hydraulic driving assembly moves from the first position 132 to the second position 133, at this time, the third hook member 33 of the first hook assembly 3 is hooked with the first hook 54 of the water stop control mechanism 5, so as to drive the water stop control mechanism 5 to move away from the base 2, until the movement to the bottom 413b of the second hook assembly 4 is limited and cannot continue to move upwards, the third hook member 33 of the first hook assembly 3 moves from the first hook position to the first unhook position, and the third hook member 33 of the first hook assembly 3 is unhook from the first hook 54 of the water stop control mechanism 5.

(3) As shown in fig. 17 (a) and 17 (b), after the first hook 54 of the water stop control mechanism 5 is unhooked from the third hook member 33 of the first hook assembly 3, the first hook moves downward under the action of gravity and is hooked by the fourth hook member 43 of the second hook assembly 4; at this time, the water level continuously drops, when the water level drops to a low level, the buoyancy of the floating body 412 in the water level control unit 41 of the second hooking component 4 is less than the gravity, the fourth hooking member 43 is at the second unhooking position to unhooking with the second hooking member 53, and the water stop control mechanism 5 moves downward under the action of the gravity.

(4) As shown in fig. 18 (a) and 18 (b), the water stop valve flap 52 of the water stop control mechanism 5 moves to the valve port 21 of the base 2 to close the valve port 21, the water stops being discharged, the water level is the lowest water level, the hydraulic driving assembly 1 is acted by the hydraulic force, the piston rod 12 in the hydraulic driving assembly moves from the second position to the first position, and the hydraulic driving assembly returns to the initial state.

While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A drain valve, comprising: the water stop control mechanism is limited and then stops moving, and after unhooking with the hydraulic driving mechanism, the water stop control mechanism is in hooking fit with the water level control mechanism, and the water level control mechanism is changed from hooking fit with the water stop control mechanism to unhooking with the water level to release the limitation of the water stop control mechanism;

the movable piece is a first hooking component, the hydraulic driving mechanism comprises a hydraulic driving component and a first hooking component, the water level control mechanism is a second hooking component, the water stop control mechanism comprises a first hook and a second hook, the hydraulic driving component controls the first hooking component to be hooked or unhooked with the first hook of the water stop control mechanism under the hydraulic action, and the second hooking component is hooked or unhooked with the second hook along with the change of the water level; after the first hooking component is unhooked from the first hook, the second hooking component is hooked with the second hook;

the base is provided with the water stop control mechanism, the water stop control mechanism further comprises a water stop main body and a water stop valve clack which is arranged on the water stop main body and is used for being in airtight fit with the valve port, and the first hook and the second hook are arranged on the water stop main body;

the hydraulic driving assembly comprises a driving rod capable of reciprocating between a first position and a second position, the driving rod is connected with the first hooking assembly, the position close to the first hooking assembly is set to be the first position, and the position far away from the first hooking assembly is set to be the second position;

the first hooking component comprises a first component main body, a third hooking member for hooking the first hook and a hooking elastic member, wherein the third hooking member is movably connected to the first component main body, the position of the third hooking member, which is in hooking fit with the first hook, is a first hooking position, the position of the third hooking member, which is out of hooking fit with the first hook, is a first unhooking position, and the hooking elastic member applies an acting force from the first unhooking position to the first hooking position to the third hooking member;

the first assembly main body is connected with the driving rod, the third hook piece is hooked with the first hook in the stroke of the driving rod from the second position to the first position, and the third hook piece is unhooked with the first hook in the stroke of the driving rod from the first position to the second position;

the first component main body of the first hooking component comprises a connecting rod, the hooking elastic piece is a spring, the third hooking piece is slidably connected to the connecting rod so as to linearly slide along the connecting rod, and the spring acts on the third hooking piece so that the third hooking piece is always acted on from a first unhooking position to a first hooking position.

2. The drain valve according to claim 1, wherein: the second hooking component comprises a second component main body, a fourth hooking part for hooking the second hook and a water level control unit, wherein the fourth hooking part is fixedly connected to the second component main body, the position of hooking the fourth hooking part and the second hook is a second hooking position, the position of unhooking the fourth hooking part and the second hook is a second unhooking position, when the water level control unit is at a high water level, the fourth hooking part is at the second hooking position and is hooked with the second hook, and when the water level control unit is at a low water level, the fourth hooking part is at the second unhooking position and is unhooked with the second hook.

3. The drain valve according to claim 1, wherein: the first component main body of the first hooking component comprises a connecting through hole, the third hooking component is pivoted to the first component main body so as to rotate around the connecting through hole, the hooking elastic component is a torsion spring, and the torsion spring acts on the third hooking component so that the third hooking component is always acted on from a first unhooking position to a first hooking position.

4. The drain valve according to claim 1, wherein: the water stopping main body of the water stopping control mechanism is a hollow cylindrical body, the first hook is arranged on the inner wall of the water stopping main body, the second hook is arranged on the outer wall of the water stopping main body, and the water stopping valve clack is arranged at the end part of the water stopping main body.

5. The drain valve according to claim 1, wherein: the base comprises a first part and a second part, the first part and the second part are hollow cylindrical bodies which are communicated with each other, the outer wall of the first part comprises a connecting part which is used for being connected with a pipeline, the second part is used for installing the water stop control mechanism, and the second part is provided with a hollowed-out part which is used for water inflow.

6. The drain valve according to claim 5, wherein: the inner diameter of the second part is larger than that of the first part, and a stepped surface is formed by the inner diameter difference to form the valve port.

7. The drain valve according to claim 2, wherein: the water level control unit of the second hooking component comprises a water tank, a floating body arranged in the water tank, a water level control unit seat body and a pivoting bracket arranged on the water level control unit seat body, and the second component main body comprises a first end connected with the floating body, a middle end used for being pivoted with the pivoting bracket and a second end fixedly connected with the fourth hooking member;

the water level control unit seat body is provided with a hollow yielding channel and a base, the yielding channel can accommodate the first hooking component to pass through, and the base is used for limiting the water stop valve clack so that the third hooking component is unhooked with the first hooking component in the stroke of the driving rod from the first position to the second position.

8. The drain valve according to claim 1, wherein: the hydraulic drive assembly includes: the hydraulic cylinder is provided with a cylinder body, the cylinder body is internally provided with a piston capable of reciprocating along the axial direction of the hydraulic cylinder, the directions of the two ends in the axial direction are defined to be a first direction and a second direction respectively, the elastic element applies force to the piston towards the first direction, the cylinder body is provided with a limiting part at a first position, the piston is limited to the first position by the limiting part under the action of the elastic element, the cylinder body is also provided with an inlet and an outlet, the inlet is configured to enable liquid to enter the cylinder body to push the piston to move from the first position towards the second direction, the piston moves to the second position under the action of the pressure of the liquid entering the cylinder body, the outlet is arranged at one end of the second position of the cylinder body towards the second direction, the piston is connected with the piston rod penetrating out of the cylinder body, and the piston drives the piston rod to reciprocate under the movement of the first position and the second position.