Electric blow-down valve and scrubber

Abstract

The utility model relates to an electric blow-down valve and a scrubber, the electric blow-down valve comprises a valve shell assembly and an electric blow-down valve main body, the valve shell assembly comprises a lower valve body and an upper valve body, the upper valve body is arranged on the lower valve body, a conical valve port is formed on the lower valve body, and the caliber of the conical valve port is gradually increased towards the direction of the upper valve body; the electric blow-down valve body is installed on the valve shell assembly and comprises a diaphragm, and part of the diaphragm can stretch into the conical valve port and abut against the valve port peripheral wall of the small-caliber end of the conical valve port so as to be used for blocking the conical valve port. Due to the fact that the conical valve port with the caliber gradually increasing in the direction of the upper valve body is formed in the lower valve body, impurities in sewage entering the lower valve body can be prevented from remaining at the position where the conical valve port is located, and the sealing performance when the membrane stretches into the conical valve port and abuts against the valve port peripheral wall of the small-caliber end of the conical valve port is guaranteed. Therefore, the sealing performance of the electric blow-down valve is ensured.

Description

Technical Field

[0001] The present application relates to the technical field related to sewage discharge, and in particular to an electric sewage discharge valve and a floor scrubber. Background Art

[0002] The electric drain valve is an important component of the floor scrubber. The electric drain valve and the drain pump can form an automatic drain system to automatically drain the sewage stored in the sewage tank after the floor scrubber is finished. The electric drain valve is usually configured as a solenoid valve, which uses the on and off power of the coil assembly in the solenoid valve to control the movement of the electromagnet, and uses the moving electromagnet to realize the on / off of the valve port in the solenoid valve, thereby achieving the purpose of controlling the discharge of sewage.

[0003] At present, the end surface of the valve body of the existing electric sewage valve, which is used to cooperate with the diaphragm and realize the on / off control of the valve port on the valve body, is usually configured as a plane. Limited by the structural characteristics of the plane, impurities are easily accumulated on the plane of the valve body when the electric sewage valve is working. In this way, when the coil assembly is powered off, the electromagnet is pushed up by the iron core spring to drive the diaphragm to block the valve port, which will affect the sealing performance of the diaphragm when it abuts against the peripheral wall of the valve port, thereby affecting the sealing performance of the electric sewage valve. Utility Model Content

[0004] In view of this, it is necessary to provide an electric drain valve and a floor scrubber that can solve the above-mentioned technical problems.

[0005] In order to solve the above technical problems, this application provides the following technical solutions:

[0006] An electric drain valve, the electric drain valve comprising:

[0007] A valve housing assembly, comprising a lower valve body and an upper valve body, wherein the upper valve body is mounted on the lower valve body, wherein a conical valve port is formed on the lower valve body, and the diameter of the conical valve port gradually increases toward the upper valve body;

[0008] The electric sewage valve body is installed on the valve housing assembly. The electric sewage valve body includes a diaphragm. The diaphragm portion can extend into the conical valve port and abut against the valve port peripheral wall at the small-diameter end of the conical valve port to seal the conical valve port.

[0009] It can be understood that by opening a conical valve port on the lower valve body and utilizing the structural characteristics of the conical valve port, when the electric sewage drain valve is in operation, impurities in the sewage that enters the lower valve body can be prevented from remaining at the location where the conical valve port is located. This ensures the sealing performance of the diaphragm when it extends into the conical valve port and abuts against the valve port peripheral wall at the small-diameter end of the conical valve port, thereby ensuring the sealing performance of the electric sewage drain valve.

[0010] In one embodiment, the diaphragm has a plug, and the plug has a sealing cone surface, and the sealing cone surface can abut against the peripheral wall of the valve port and seal the conical valve port.

[0011] In one of the embodiments, along the center line of the conical valve port, the maximum distance between the plug and the peripheral wall of the valve port is set to S, where S>18mm.

[0012] It can be understood that, through the above-mentioned structural setting, the distance formed between the plug and the peripheral wall of the valve port can discharge the sewage in the valve housing assembly in time, thus ensuring the demand for large-flow sewage discharge when the electric sewage valve is working.

[0013] In one embodiment, the electric drain valve body further includes a connecting rod, an elastic member, a motor, a fixed pulley and a connecting rope, wherein the connecting rod is slidably connected to the upper valve body and connected to the diaphragm, and the elastic member is sleeved on the connecting rod and abuts against the connecting rod and the upper valve body respectively;

[0014] The motor is installed in the upper valve body and is drivingly connected to the fixed pulley. The connecting rope is wound around the fixed pulley and is drivingly connected to the fixed pulley and the connecting rod respectively.

[0015] It can be understood that the fixed pulley and the connecting rope are used to realize the power transmission between the motor and the connecting rod. On the one hand, this can realize the control of the large stroke movement of the diaphragm and achieve the purpose of large flow control of the electric sewage valve. On the other hand, it also simplifies the structure of the drive component and improves the stability during power transmission, which has the effect of reducing costs and saving working energy consumption.

[0016] In one embodiment, the connecting rod portion is inserted into the upper valve body and is circumferentially limited with the upper valve body;

[0017] Wherein, the center line of the connecting rod is arranged on the center line of the circle of the lower valve body, and the rotation center line of the fixed pulley is eccentrically arranged relative to the upper valve body.

[0018] It can be understood that, through the above-mentioned structural arrangement, the part of the connecting rope extending out of the fixed pulley can be arranged on the same straight line as the center line of the connecting rod, so that the connecting rope can pull the connecting rod along the center line of the connecting rod. This can reduce the resistance of the lower valve body to the connecting rod during the process of being pulled by the connecting rope, thereby further reducing the working power of the electric sewage valve.

[0019] In one embodiment, the diaphragm includes a bellows, which is disposed at one end of the plug and is connected and communicated with the plug;

[0020] Wherein, the diaphragm further has a sealing ring body, which is arranged on one end of the diaphragm away from the plug, and the sealing ring body is arranged between the lower valve body and the upper valve body and deformed under pressure.

[0021] It can be understood that, by utilizing the structural characteristics of the bellows' telescopic deformation, the plug can control the telescopic deformation of the bellows while following the movement of the connecting rod, so as to reduce the resistance generated by the diaphragm to the movement of the connecting rod. This can reduce the force required for the connecting rope to drive the connecting rod to move, thereby further reducing the working power of the electric sewage valve; at the same time, the sealing ring body is arranged between the lower valve body and the upper valve body and deformed under pressure. In this way, the sealing ring body can be used to assemble and seal the lower valve body and the upper valve body, thereby ensuring the sealing of the assembly between the lower valve body and the upper valve body and preventing leakage.

[0022] In one embodiment, the electric drain valve further includes an upper valve cover, the upper valve cover is mounted on the upper valve body, and a receiving cavity is formed between the upper valve cover and the upper valve body, and the receiving cavity is used to accommodate the fixed pulley and the motor;

[0023] Wherein, the fixed pulley is rotatably connected to the upper valve cover.

[0024] In one of the embodiments, a stop block is formed on the fixed pulley, and a stop convex portion is formed on the upper valve cover, and the stop block can abut against the stop convex portion to limit the rotation of the fixed pulley.

[0025] It can be understood that by utilizing the abutment between the stop block on the fixed pulley and the stop protrusion on the upper valve cover, the maximum angle of the fixed pulley when rotating in the upper valve cover can be limited, and the movement stroke of the diaphragm can be limited when it releases the blockage of the conical valve port.

[0026] In one of the embodiments, a signal triggering portion is formed on the fixed pulley;

[0027] Wherein, the electric drain valve further includes a sensor, the sensor is matched with the signal triggering unit, and the sensor can be triggered by the signal triggering unit and generate a feedback signal.

[0028] It can be understood that, by utilizing the feedback signal generated when the sensor is triggered by the signal triggering unit, signal feedback of the fixed pulley rotation angle can be realized to meet the requirements of the motor for controlling the fixed pulley and meet the use requirements of the automatic control of the electric sewage valve.

[0029] The present application also seeks protection for a floor scrubber, comprising the electric drain valve described above.

[0030] Due to the application of the above solution, the present application has the following advantages compared with the prior art:

[0031] The electric sewage valve and floor scrubber for which protection is sought in the present application, by opening a conical valve port on the lower valve body and utilizing the structural characteristics of the conical valve port, can prevent impurities in sewage entering the lower valve body from remaining at the location of the conical valve port when the electric sewage valve is in operation. This ensures the sealing performance of the diaphragm when it extends into the conical valve port and abuts against the valve port peripheral wall at the small-diameter end of the conical valve port, thereby ensuring the sealing performance of the electric sewage valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 An exploded view of an electric drain valve provided in one embodiment of the present application;

[0034] Figure 2 A schematic diagram of the structure of an electric drain valve provided in one embodiment of the present application;

[0035] Figure 3 This is a schematic diagram of the structure of an electric drain valve provided in one embodiment of the present application; wherein the upper valve cover is in a hidden state;

[0036] Figure 4 A cross-sectional view of an electric drain valve provided in one embodiment of the present application;

[0037] Figure 5 A schematic diagram of the assembly of an upper valve cover and a fixed pulley provided in one embodiment of the present application;

[0038] Figure 6 A schematic diagram of the structure of a connecting rod provided in one embodiment of the present application;

[0039] Figure 7 A schematic structural diagram of a connecting rod from another perspective provided in an embodiment of the present application.

[0040] 1. The valve body of the embodiment of the present invention is provided with a plurality of connecting rods, a plurality of connecting rods and a plurality of connecting rods. The connecting rods are provided with a plurality of connecting rods, a plurality of connecting rods and a plurality of connecting rods. The connecting rods are provided with a plurality of connecting rods, a plurality of connecting rods and a plurality of connecting rods. The connecting rods are provided with a plurality of connecting rods, a plurality of connecting rods and a plurality of connecting rods. DETAILED DESCRIPTION

[0041] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0042] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may also be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0044] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediate medium. Moreover, a first feature being “above”, “above” or “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below” or “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0045] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more related listed items.

[0046] The electric drain valve 100 for which protection is sought in the present application is applied to a floor scrubber (not shown). The electric drain valve 100 can constitute an automatic drain system together with a drain pump (not shown) for automatically draining the sewage stored in the sewage tank after the floor scrubber is finished cleaning.

[0047] like Figures 1 to 7 As shown, an electric drain valve 100 provided in an embodiment of the present application includes a valve housing assembly 10 and an electric drain valve body, wherein the valve housing assembly 10 includes a lower valve body 11 and an upper valve body 12, wherein the upper valve body 12 is mounted on the lower valve body 11, wherein a conical valve port 111 is formed on the lower valve body 11, and the diameter of the conical valve port 111 gradually increases toward the upper valve body 12; the electric drain valve body is mounted on the valve housing assembly 10, and the electric drain valve body includes a diaphragm 21, wherein a portion of the diaphragm 21 can extend into the conical valve port 111 and abut against a valve port peripheral wall 1111 at a small-diameter end of the conical valve port 111, for blocking the conical valve port 111. Here, the valve port peripheral wall 1111 specifically refers to the conical surface of the conical valve port 111 on the lower valve body 11.

[0048] It can be understood that by opening the conical valve port 111 on the lower valve body 11 and utilizing the structural characteristics of the conical valve port 111, when the electric sewage valve 100 is in operation, it is possible to prevent impurities in the sewage entering the lower valve body 11 from remaining at the location of the conical valve port 111. This ensures the sealing performance of the diaphragm 21 when it extends into the conical valve port 111 and abuts against the valve port peripheral wall 1111 at the small-diameter end of the conical valve port 111, thereby ensuring the sealing performance of the electric sewage valve 100.

[0049] like Figure 4As shown, in one embodiment, the diaphragm 21 has a plug 212 , and the plug 212 has a sealing cone surface 2121 . The sealing cone surface 2121 can abut against the valve port peripheral wall 1111 and seal the conical valve port 111 .

[0050] like Figure 1 , Figure 3 As shown, in one embodiment, along the center line direction of the conical valve port 111, the maximum distance between the plug 212 and the valve port peripheral wall 1111 is set to S, where S>18mm. In this way, the distance formed between the plug 212 and the valve port peripheral wall 1111 can discharge the sewage in the valve housing assembly 10 in time, thus ensuring the demand for large-flow sewage discharge when the electric sewage valve 100 is working.

[0051] like Figure 1 As shown, in one embodiment, the diaphragm 21 includes a bellows 211, which is arranged at one end of the plug 212 and is connected and communicated with the plug 212; wherein the diaphragm 21 also has a sealing ring body 213, which is arranged between the lower valve body 11 and the upper valve body 12 and deformed under pressure. That is to say, by utilizing the structural characteristics of the bellows 211 being retractable and deformable, the plug 212 controls the retractable deformation of the bellows 211 while following the movement of the connecting rod 22, so as to reduce the resistance generated by the diaphragm 21 to the movement of the connecting rod 22, thereby reducing the force required when the connecting rope 33 drives the connecting rod 22 to move, thereby further reducing the working power of the electric drain valve 100; at the same time, the sealing ring body 213 is arranged between the lower valve body 11 and the upper valve body 12 and deformed under pressure, so that the sealing ring body 213 can be used to assemble and seal the lower valve body 11 and the upper valve body 12, ensuring the sealing performance of the assembly between the lower valve body 11 and the upper valve body 12 to prevent leakage. Here, the diaphragm 21 can be integrally injection molded by materials such as rubber or silicone.

[0052] like Figure 1As shown, in one embodiment, the main body of the electric sewage valve further includes a connecting rod 22, an elastic member 23, a motor 31, a fixed pulley 32 and a connecting rope 33, the connecting rod 22 is slidably connected to the upper valve body 12 and connected to the diaphragm 21, the elastic member 23 is sleeved on the connecting rod 22 and abuts against the connecting rod 22 and the upper valve body 12 respectively; the motor 31 is installed in the upper valve body 12 and is transmission-connected to the fixed pulley 32, and the connecting rope 33 is wound around the fixed pulley 32 and is transmission-connected to the fixed pulley 32 and the connecting rod 22 respectively. It can be understood that the fixed pulley 32 and the connecting rope 33 are used to realize the power transmission between the motor 31 and the connecting rod 22, so that on the one hand, the control of the large stroke movement of the diaphragm 21 can be realized, and the purpose of large flow control of the electric sewage valve 100 can be achieved, and on the other hand, the structure of the driving assembly 30 is simplified, and the stability during power transmission is improved, which has the effect of reducing costs and saving working energy consumption. Here, the fixed pulley 32 is assembled to the output shaft 311 of the motor 31 by keyway matching.

[0053] like Figure 1 , Figure 4 As shown, in one embodiment, the connecting rod 22 is partially inserted into the upper valve body 12 and is circumferentially limited with the upper valve body 12; wherein, the center line of the connecting rod 22 is set on the center line of the circle of the lower valve body 11, and the rotation center line of the fixed pulley 32 is eccentrically set relative to the upper valve body 12. In this way, the part of the connecting rope 33 extending out of the fixed pulley 32 and the center line of the connecting rod 22 can be set on the same straight line, so that the connecting rope 33 can pull the connecting rod 22 along the center line of the connecting rod 22, so that the resistance of the connecting rod 22 to the lower valve body 11 during the process of being pulled by the connecting rope 33 can be reduced, thereby further reducing the working power of the electric sewage valve 100.

[0054] like Figure 1 As shown, in one embodiment, the elastic member 23 can be set as a spring. Of course, for those skilled in the art, the elastic member 23 can also be set as other rubber sleeves with higher elasticity, etc., which will not be elaborated here.

[0055] In one embodiment, the motor 31 is configured as a stepper motor. That is to say, the motor 31 is configured as a stepper motor. Since the stepper motor has a mechanical self-locking function, when the stepper motor is powered off and stops rotating the fixed pulley 32, it can play a locking function on the fixed pulley 32 to prevent the fixed pulley 32 from rotating under the tension of the connecting rope 33, and the electric sewage valve 100 always maintains the state of maximum flow sewage discharge. It should be noted that the specific structure of the stepper motor and the working principle of how to realize the transmission of the fixed pulley during operation can adopt the existing conventional methods, which will not be elaborated here. Of course, for those skilled in the art, the motor 31 can also be configured as a brushless motor plus a controller to realize the positioning self-locking function, which will not be elaborated here.

[0056] like Figure 1 , Figure 2 As shown, in one embodiment, the electric sewage valve 100 also includes an upper valve cover 40, which is installed on the upper valve body 12, and a receiving chamber 101 is formed between the upper valve cover 40 and the upper valve body 12, and the receiving chamber 101 is used to accommodate the fixed pulley 32 and the motor 31; wherein the fixed pulley 32 is rotatably connected to the upper valve cover 40.

[0057] like Figure 3 , Figure 4 As shown, in one embodiment, a stop block 321 is formed on the fixed pulley 32, and a stop convex portion 41 is formed on the upper valve cover 40, and the stop block 321 can abut against the stop convex portion 41 to limit the rotation of the fixed pulley 32. In other words, by utilizing the abutment and cooperation between the stop block 321 on the fixed pulley 32 and the stop convex portion 41 on the upper valve cover 40, the maximum angle of the fixed pulley 32 when rotating in the upper valve cover 40 can be limited, and the movement stroke of the diaphragm 21 when releasing the blockage of the conical valve port 111 can be limited.

[0058] like Figure 3 As shown, in one embodiment, a signal triggering unit 322 is formed on the fixed pulley 32; wherein, the electric drain valve 100 further includes a sensor 50, the sensor 50 is integrated on the circuit board 60, the sensor 50 is matched with the signal triggering unit 322, and the sensor 50 can be triggered by the signal triggering unit 322 and generate a feedback signal. In other words, the feedback signal generated when the sensor 50 is triggered by the signal triggering unit 322 can realize the signal feedback of the rotation angle of the fixed pulley 32, so as to meet the requirements of the motor 31 to control the fixed pulley 32, and meet the use requirements of the automatic control of the electric drain valve 100. Here, the sensor 50 is set as a photoelectric switch or a micro switch.

[0059] like Figure 1 , Figure 3 , Figure 4 As shown, in one embodiment, the fixed pulley 32 is provided with a first rope groove 323 and a through hole 324, wherein the first rope groove 323 is provided on the outer periphery of the fixed pulley 32 and communicates with the through hole 324; wherein the connecting rope 33 has a first limiting head 331, and the connecting rope 33 can be wound around the fixed pulley 32 through the first rope groove 323, and the first limiting head 331 passing through the through hole 324 is used to limit the position of the fixed pulley 32. Such a configuration can facilitate the assembly connection between the connecting rope 33 and the fixed pulley 32, wherein the connecting rope 33 is wound in the first rope groove 323 on the outer periphery of the fixed pulley 32, so that the fixed pulley 32 can ensure that the connecting rope 33 can be gathered or released while the fixed pulley 32 is rotating.

[0060] like Figure 1 , Figure 6 , Figure 7 As shown, in one embodiment, the connecting rod 22 is provided with a second rope groove 221 and a limiting groove 222, and the second rope groove 221 is connected with the limiting groove 222; wherein, the connecting rope 33 further has a second limiting head 332, and a portion of the connecting rope 33 can be clamped into the second rope groove 221, and the second limiting head 332 is abutted against the groove wall 2221 of the limiting groove 222 for limiting. Such a configuration can facilitate the assembly connection between the connecting rope 33 and the connecting rod 22.

[0061] As can be seen from the above, when the electric drain valve 100 of the present application is working, the motor 31 starts and drives the fixed pulley 32 to rotate clockwise. The fixed pulley 32 can retract the connecting rope 33 while rotating, so that the connecting rope 33 can pull the plug 212 on the diaphragm 21 through the connecting rod 22, so that the plug 212 can release the blockage of the conical valve port 111 and open the conical valve port 111. When the fixed pulley 32 rotates a certain angle, it can trigger the sensor 50, and then use the feedback signal generated after the sensor 50 is triggered to control the motor 31 to cut off the power. At this time, the electric drain valve 100 is in the state of maximum flow discharge. When the motor 31 reversely controls the fixed pulley 32 to rotate, the plug 212 on the diaphragm 21 can be controlled to block the conical valve port 111.

[0062] The present application also seeks to protect a floor scrubber, comprising the electric drain valve 100 described above.

[0063] In summary, the electric sewage valve 100 and the floor scrubber that are requested to be protected in the present application have a conical valve opening 111 formed on the lower valve body 11, the diameter of which gradually increases in the direction of the upper valve body 12. In this way, impurities in the sewage entering the lower valve body 11 can be prevented from remaining at the position where the conical valve opening 111 is located, thereby ensuring the sealing performance of the diaphragm 21 when it extends into the conical valve opening 111 and abuts against the valve opening peripheral wall 1111 at the small-diameter end of the conical valve opening 111, thereby ensuring the sealing performance of the electric sewage valve 100.

[0064] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the scope of patent protection of the present application shall be subject to the attached claims.

Claims

1. An electric drain valve, characterized in that: The electric drain valve (100) comprises: A valve housing assembly (10) comprises a lower valve body (11) and an upper valve body (12), wherein the upper valve body (12) is mounted on the lower valve body (11), wherein a conical valve port (111) is formed on the lower valve body (11), and the diameter of the conical valve port (111) gradually increases toward the upper valve body (12); The electric sewage valve body is installed on the valve housing assembly (10), and the electric sewage valve body includes a diaphragm (21). The diaphragm (21) can partially extend into the conical valve port (111) and abut against the valve port peripheral wall (1111) at the small-diameter end of the conical valve port (111), so as to block the conical valve port (111).

2. The electric drain valve according to claim 1, characterized in that: The diaphragm (21) has a plug (212), and the plug (212) has a sealing conical surface (2121). The sealing conical surface (2121) can abut against the peripheral wall (1111) of the valve port and seal the conical valve port (111).

3. The electric drain valve according to claim 2, characterized in that: Along the center line direction of the conical valve opening (111), the maximum distance between the plug (212) and the peripheral wall (1111) of the valve opening is set to S, where S>18 mm.

4. The electric drain valve according to claim 1, characterized in that: The electric sewage valve body also includes a connecting rod (22), an elastic member (23), a motor (31), a fixed pulley (32) and a connecting rope (33); the connecting rod (22) is slidably connected to the upper valve body (12) and connected to the diaphragm (21); the elastic member (23) is sleeved on the connecting rod (22) and abuts against the connecting rod (22) and the upper valve body (12) respectively; The motor (31) is installed in the upper valve body (12) and is drivingly connected to the fixed pulley (32); the connecting rope (33) is wound around the fixed pulley (32) and is drivingly connected to the fixed pulley (32) and the connecting rod (22) respectively.

5. The electric drain valve according to claim 4, characterized in that: The connecting rod (22) is partially inserted into the upper valve body (12) and is circumferentially limited with the upper valve body (12); The center line of the connecting rod (22) is arranged on the center line of the circle of the lower valve body (11), and the rotation center line of the fixed pulley (32) is eccentrically arranged relative to the upper valve body (12).

6. The electric drain valve according to claim 2, characterized in that: The diaphragm (21) comprises a bellows (211), and the bellows (211) is arranged at one end of the plug (212) and is connected to and communicates with the plug (212); The diaphragm (21) further comprises a sealing ring body (213), wherein the sealing ring body (213) is arranged on one end of the diaphragm (21) away from the plug (212), and the sealing ring body (213) is arranged between the lower valve body (11) and the upper valve body (12) and deformed under pressure.

7. The electric drain valve according to claim 4, characterized in that: The electric sewage valve (100) further comprises an upper valve cover (40), wherein the upper valve cover (40) is mounted on the upper valve body (12), and an accommodating chamber (101) is formed between the upper valve cover (40) and the upper valve body (12), wherein the accommodating chamber (101) is used to accommodate the fixed pulley (32) and the motor (31); Wherein, the fixed pulley (32) is rotatably connected to the upper valve cover (40).

8. The electric drain valve according to claim 7, characterized in that: A stop block (321) is formed on the fixed pulley (32), and a stop convex portion (41) is formed on the upper valve cover (40). The stop block (321) can abut against the stop convex portion (41) to limit the rotation of the fixed pulley (32).

9. The electric drain valve according to claim 4, characterized in that: A signal triggering portion (322) is formed on the fixed pulley (32); The electric sewage valve (100) further comprises a sensor (50), wherein the sensor (50) is matched with the signal triggering unit (322), and the sensor (50) can be triggered by the signal triggering unit (322) and generate a feedback signal.

10. A floor scrubber, characterized in that: It comprises the electric drain valve (100) as claimed in any one of claims 1 to 9.

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