Wastewater valve and drainage apparatus

Abstract

The application discloses a wastewater valve and a drainage equipment, the drainage equipment comprises the wastewater valve, a scale-preventing rubber and a buffer water tank, the scale-preventing rubber prevents solid particles from entering the wastewater valve, high-temperature wastewater is cooled by the buffer water tank and then enters a wastewater box; the wastewater valve comprises a valve body, a valve core, a motor, a lower valve plate, an upper valve plate and a pressing cover, the lower valve plate is provided with a second water inlet channel, a second water outlet channel and a first friction surface, the upper valve plate is provided with a water passing groove, a scale-preventing groove and a second friction surface, the first friction surface is tightly attached to the second friction surface, and the upper valve plate has a first position state and a second position state which are circumferentially rotated. The technical scheme can greatly reduce the influence of high-temperature and high-pressure wastewater on the performance and service life of the wastewater valve, and can avoid that high-temperature and high-pressure steam discharged from the wastewater valve directly impacts the wastewater box, so that sharp noise and a large amount of steam overflow are avoided.

Description

Technical Field

[0001] This invention relates to the field of valve technology for wastewater discharge, and more particularly to a wastewater valve and drainage equipment. Background Technology

[0002] Wastewater valves are devices that discharge wastewater generated by the system. They have a wide range of applications. However, due to the complexity of the media and environment they discharge, wastewater valves are more prone to failure compared to other types of valves.

[0003] Wastewater valves are primarily used in high-temperature, high-pressure, and highly concentrated water environments, placing stringent requirements on them. High temperature and pressure not only demand high standards for the valve's materials and sealing, but the discharged high-temperature, high-impact steam-laden hot water also poses a certain degree of danger. The impact of highly concentrated water on wastewater valves is even greater than that of high temperature and pressure. Highly concentrated water means it contains a large amount of scale and crystals that precipitate beyond its solubility. Since wastewater valves are typically installed at the bottom of containers, these solid particles tend to settle and accumulate inside the valve, forming clumps. This can easily clog drainage paths, and the strong adhesion of scale to the walls can prevent the valve core from opening. Another issue is that solid particles can adhere to the sealing surface, leading to seal failure and leakage. Current technology lacks effective solutions to reduce the risk level of wastewater valves to a manageable level. Therefore, in equipment with wastewater valves, related problems consistently rank among the top after-sales issues.

[0004] In summary, wastewater valves have high requirements in terms of high temperature, high pressure, sealing reliability, scale inhibition, and anti-clogging, and a complete technical solution is needed to ensure the reliability of the drainage system. Summary of the Invention

[0005] In view of the above-mentioned problems in the prior art, a wastewater valve and drainage device are provided to overcome at least one of the above-mentioned technical defects.

[0006] The specific technical solution is as follows:

[0007] A wastewater valve includes a valve body with an internal valve cavity, a valve core housed within the valve cavity, and a motor mounted on the upper end of the valve body for driving the valve core to rotate circumferentially. The valve body also has a first inlet channel and a first outlet channel communicating with the valve cavity. The wastewater valve further includes:

[0008] The lower valve plate is installed in the valve cavity and its upper end face forms the first friction surface. It is provided with a second water inlet channel connected to the first water inlet channel and a second water outlet channel connected to the first water outlet channel.

[0009] The upper valve plate is rotatably mounted in the valve cavity and its lower end face forms a second friction surface. The lower end face of the upper valve plate has a water groove and an anti-scaling groove, and the upper end is connected to the valve core. The valve core drives the upper valve plate to rotate circumferentially.

[0010] Furthermore, the second friction surface is in close contact with the first friction surface, and in the circumferential rotation direction, the upper valve plate has a first position state that causes the second water inlet channel and the second water outlet channel to be simultaneously connected to the water passage, and a second position state that causes the second water inlet channel to be connected to the anti-scaling tank.

[0011] Preferably, a sealing gasket is also installed in the valve cavity below the lower valve plate. The sealing gasket has a third water inlet channel that connects the first water inlet channel and the second water inlet channel, and a third water outlet channel that connects the first water outlet channel and the second water outlet channel.

[0012] The inner walls of the third water inlet channel and the third water outlet channel are both formed with annular protruding ribs extending inward, and the upper and lower end faces of the sealing gasket are both formed with annular upper sealing ribs and lower sealing ribs around the third water inlet channel and the third water outlet channel.

[0013] Preferably, a pressure cap is fitted on the open end of the valve body, and in the assembled state, the upper and lower ends of the valve core abut against the pressure cap and the upper valve core respectively, and the sealing gasket is elastic in the longitudinal direction and has an elastic force that causes the lower valve plate to press tightly against the upper valve plate.

[0014] Preferably, a limiting hole is provided on the inner bottom surface of the valve cavity, and the lower end of the sealing gasket has a positioning protrusion that is opposite in position and matches the shape of the limiting hole, so as to limit the installation of the sealing gasket in the valve cavity.

[0015] Preferably, the inner wall of the valve cavity has an upper opening notch, and the outer edge of the lower valve plate has a limiting protrusion that matches the shape of the notch, so as to limit the circumferential rotation tendency of the lower valve plate by locking it in the notch through the limiting protrusion.

[0016] Preferably, the compression cap has a circular through hole in the middle, and the upper end of the valve core has a circular protrusion that passes through the circular through hole. The outer edge of the circular protrusion forms an arc-shaped notch, and the inner wall of the circular through hole has a flange that is accommodated in the arc-shaped notch. The flange and the arc-shaped notch together limit the maximum stroke of the valve plate in clockwise and counterclockwise rotation.

[0017] Preferably, in the first position, the upper opening plane projections of the second water inlet channel and the second water outlet channel are completely located within the water passage; in the second position, the anti-scaling tank is arranged opposite to the second water inlet channel.

[0018] Preferably, the outer periphery of the upper valve plate also has an annular groove for fitting a sealing ring.

[0019] The present invention also provides a drainage device, including a buffer water tank and a wastewater valve as described above. The first inlet channel of the wastewater valve is connected to the outlet of an external wastewater generator, and the first outlet channel of the wastewater valve is connected to the inside of the buffer water tank. The buffer water tank contains wastewater input through the first outlet channel and is equipped with a drainage pipe. The upper end of the drainage pipe extends upward out of the buffer water tank and is connected to an external wastewater box through a connecting pipe.

[0020] Preferably, a scale-inhibiting rubber is also installed at the front end of the first water inlet channel. The scale-inhibiting rubber has a slit in the middle, and the slit has a flow state that allows wastewater to pass through under water pressure impact, and a closed state that inhibits scale under pressure balance.

[0021] The beneficial effects of the above technical solution are as follows:

[0022] (1) The wastewater valve includes a valve body, a valve core, a motor, a lower valve plate, and an upper valve plate. The lower valve plate has a second inlet channel, a second outlet channel, and a first friction surface. The upper valve plate has a water passage groove, an anti-scaling groove, and a second friction surface. The first friction surface and the second friction surface are in close contact. The upper valve plate has a first position state and a second position state for circumferential rotation. This ensures that the friction surfaces of the upper and lower valve plates are not easily corroded or left by wastewater. It avoids the problem of the upper valve plate being obstructed due to the high adhesion of scale on the friction surface and the scale scratching the friction surface, which would cause sealing problems of the upper and lower valve plates.

[0023] (2) The upper sealing rib, the annular convex rib and the lower sealing rib together form a three-layer sealing structure, which can ensure that the high temperature and high pressure wastewater in the first water inlet channel must pass through two layers of seals when the wastewater valve is closed in order to escape to the first water outlet channel or above the valve plate. In this embodiment, the compression amount of the first seal (corresponding to the lower sealing rib) is greater than the compression amount of the second seal (corresponding to the upper sealing rib).

[0024] (3) A pressure cap is installed on the open end of the valve body, and the pressure cap also plays a pressing role. Under the joint action of the sealing gasket, it ensures that the two friction surfaces are always in close contact.

[0025] (4) The drainage equipment includes a buffer tank and a wastewater valve. The inlet and outlet of the wastewater valve are connected to the wastewater generator and the buffer tank, respectively. The buffer tank contains the wastewater that was left over from the last drainage and has been cooled. It is discharged to the wastewater box through the drainage pipe. After the high temperature water vapor enters the buffer tank, it is quickly condensed and enters the wastewater box under the guidance of the drainage pipe and connecting pipe. At this time, the water temperature has dropped significantly. There will be no high decibel noise or steam coming out after entering the wastewater box (when there is no buffer tank, the high temperature and high impact force water vapor rushes into the wastewater box. The high impact force brings a sharp impact sound. The high temperature brings a large amount of steam that instantly fills the wastewater box, which increases the internal pressure and greatly enhances the escape from the gap of the water inlet to the inside and outside of the equipment, causing greater safety). At this time, the user will not feel too hot when taking out the wastewater box.

[0026] (5) The front end of the first water inlet channel is also equipped with scale-inhibiting rubber. The scale-inhibiting rubber has a slit in the middle. The slit has a flow state that is opened under water pressure to allow wastewater to pass through, and a closed state that is scale-inhibiting under pressure balance. Scale cannot adhere to the rubber. The rubber has excellent softness and resilience. When the wastewater valve is not draining, the pressure on both sides of the scale-inhibiting rubber is the same, and large particles of scale are prevented from passing through, ensuring the smooth flow of the wastewater valve inlet. When the wastewater valve drains, the high temperature water vapor can easily break open the scale-inhibiting rubber and push the deformed surface to the side wall. After the drainage is completed, the wastewater valve is closed, the pressure at both ends of the scale-inhibiting rubber returns to the same, the deformed surface returns to flat, and large particles still cannot pass through, thus achieving the scale-inhibiting effect. Attached Figure Description

[0027] Figure 1 The explosion of the wastewater valve of this invention Figure 1 ;

[0028] Figure 2 The explosion of the wastewater valve of this invention Figure 2 ;

[0029] Figure 3 A perspective view of the valve body in the wastewater valve of this invention;

[0030] Figure 4 This is a cross-sectional view of the sealing gasket in the wastewater valve of the present invention;

[0031] Figure 5 This is a cross-sectional view of the wastewater valve of the present invention in the open water circuit state;

[0032] Figure 6 This is a schematic diagram showing the disassembled state of the wastewater valve of the present invention in the water circuit open state;

[0033] Figure 7 This is a cross-sectional view of the wastewater valve of the present invention in the closed water circuit state;

[0034] Figure 8This is a schematic diagram showing the disassembled state of the wastewater valve of the present invention in the water circuit closed state;

[0035] Figure 9 This is a cross-sectional view of the drainage device of the present invention;

[0036] Figure 10 This is a cross-sectional view of the wastewater generator connected to the drainage equipment of the present invention;

[0037] Figure 11 The state of the scale-blocking rubber in the drainage device of the present invention. Figure 1 ;

[0038] Figure 12 The state of the scale-blocking rubber in the drainage device of the present invention. Figure 2 . Detailed Implementation

[0039] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings.

[0040] Example 1,

[0041] See Figures 1 to 8 As shown in the figure, the wastewater valve provided in this embodiment includes a valve body 1 with an internal valve cavity, a valve core 5 housed within the valve cavity, and a motor 7 mounted on the upper end of the valve body 1 for driving the valve core 5 to rotate circumferentially. The valve body 1 also has a first inlet channel 101 and a first outlet channel 102 communicating with the valve cavity. The wastewater valve further includes:

[0042] The lower valve plate 3 is installed in the valve cavity and its upper end face forms the first friction surface 30. It is provided with a second water inlet channel 31 connected to the first water inlet channel 101 and a second water outlet channel 32 connected to the first water outlet channel 102.

[0043] The upper valve plate 4 is rotatably mounted in the valve cavity and its lower end face forms the second friction surface 40. The lower end face of the upper valve plate 4 has a water groove 41 and an anti-scaling groove 42, and the upper end is connected to the valve core 5. The valve core 5 drives the upper valve plate 4 to rotate circumferentially.

[0044] Furthermore, the second friction surface 40 is in close contact with the first friction surface 30. In the circumferential rotation direction, the upper valve plate 4 has a first position state that causes the second water inlet channel 31 and the second water outlet channel 32 to be simultaneously connected to the water passage 41, and a second position state that causes the second water inlet channel 31 to be connected to the anti-scaling tank 42.

[0045] In practical applications, when the wastewater valve is closed, corresponding to the upper valve plate 4 being in the second position, both the inlet and outlet channels of the lower valve plate 3 are immersed in water, while only the anti-scaling groove 42 of the upper valve plate 4 is immersed in water. This ensures that the mutual friction sealing surfaces of the upper and lower valve plates 3 are almost not in contact with water, preventing scale buildup and avoiding the problems caused by scale buildup on the friction surfaces, which could hinder the rotation of the upper valve plate 4 or scratch the friction surfaces, thus causing sealing issues. Conversely, when the wastewater valve is opened by the motor 7, corresponding to... When the upper valve plate 4 is in the first position, wastewater flows into the water passage 41 of the upper valve plate 4 and then flows out from the second water outlet 32 ​​of the lower valve plate 3. At this time, impurities will inevitably remain on the sealing friction surfaces of the upper and lower valve plates. However, drainage can usually be completed within 20 seconds, and the impurities cannot form adhesion. When the wastewater valve is closed, as the upper valve plate 4 slides, the remaining impurities are easily scraped away by the second friction surface 40. The wastewater valve is not affected by scale when closing and opening, so the valve core 5 and the motor 7 will not jam after a period of use.

[0046] Based on the above technical solution, the wastewater valve includes a valve body 1, a valve core 5, a motor 7, a lower valve plate 3, and an upper valve plate 4. The lower valve plate 3 has a second water inlet channel 31, a second water outlet channel 32, and a first friction surface 30. The upper valve plate 4 has a water passage groove 41, an anti-scaling groove 42, and a second friction surface 40. The first friction surface 30 and the second friction surface 40 are in close contact. The upper valve plate 4 has a first position state and a second position state for circumferential rotation. This can ensure that the friction surfaces of the upper and lower valve plates 3 are not easily corroded and left by wastewater. It avoids the problem of the upper valve plate 4 being obstructed due to the high adhesion of scale on the friction surface, and the scale scratching the friction surface, which would cause sealing problems of the upper and lower valve plates 3.

[0047] In a preferred embodiment, combined with Figure 1 , Figure 2 as well as Figure 4As shown, a sealing gasket 2 is installed in the valve cavity below the lower valve plate 3. The sealing gasket 2 has a third water inlet channel 21 that connects the first water inlet channel 101 and the second water inlet channel 31, and a third water outlet channel 22 that connects the first water outlet channel 102 and the second water outlet channel 32. The inner walls of the third water inlet channel 21 and the third water outlet channel 22 are both formed with annular ribs 24 extending inward. The upper and lower end faces of the sealing gasket 2 are surrounded by annular upper sealing ribs 25 and lower sealing ribs 26, and the upper sealing ribs 25, annular ribs 24, and lower sealing ribs 26 together form a three-layer sealing structure. When the wastewater is in the closed state, the wastewater in the third inlet channel 21 must pass through two layers of raised ribs, the upper sealing rib 25 or the lower sealing rib 26, whether it reaches the third outlet channel 22 or the valve core 5, thus achieving a double sealing effect. In this embodiment, the compression amount of the first seal (corresponding to the lower sealing rib 26) is greater than the compression amount of the second seal (corresponding to the upper sealing rib 25). In a preferred embodiment, a pressure cap 6 is fitted to the open end of the valve body 1, and in the assembled state, the upper and lower ends of the valve core 5 abut against the pressure cap 6 and the upper valve core 5, respectively. The sealing gasket 2 is elastic in the longitudinal direction and has an elastic force that causes the lower valve plate 3 to press tightly against the upper valve plate 4. Therefore, the pressure cap 6 also plays a pressing role, and under the combined action of the sealing gasket 2, it ensures that the two friction surfaces are always in a tight contact state.

[0048] Meanwhile, the surface of the clamping cover 6 that mates with the upper end of the valve body 1 is coated with glue, and the outer edges are fixed together with fasteners. This ensures that after the wastewater valve has been running for a long time, the clamping cover 6 will not loosen due to the long-term vibration of the motor, which would affect the tightness between the upper and lower valve plates. This ensures the clamping effect of the clamping cover 6. Therefore, this solution has a longer service life and better performance.

[0049] As a further preferred embodiment, combined with Figure 3 As shown, a limiting hole 103 is formed on the inner bottom surface of the valve cavity. The lower end of the sealing gasket 2 has a positioning protrusion 23 that is opposite in position and matches the shape of the limiting hole 103, which is used to limit the sealing gasket 2 in the valve cavity. Furthermore, the inner sidewall of the valve cavity has an upper opening notch 104, and the outer edge of the lower valve plate 3 has a limiting protrusion 33 that matches the shape of the notch 104, which is used to hold the lower valve plate 3 in the notch 104 and limit its circumferential rotation tendency, so that the lower valve plate 3 is kept in the valve cavity and does not rotate circumferentially under the influence of the upper valve plate 4. However, it is obvious that both the sealing gasket 2 and the lower valve plate 3 can be directly fixed in the valve cavity by fasteners or by a tight fit, and are not limited to this. At the same time, in this embodiment, both the upper valve plate 4 and the lower valve plate 3 are made of ceramic plates.

[0050] In a preferred embodiment, the upper end face of the upper valve plate 4 is recessed to form a waist-shaped groove 43, and the lower end face of the valve core 5 has a limiting member 53 that matches the shape of the waist-shaped groove 43 and is positioned opposite to it, so as to realize the connection between the two. Further, the pressing cover 6 has a circular through hole 61 in the middle, and the upper end of the valve core 5 also has a circular protrusion 51 that passes through the circular through hole 61. The outer edge of the circular protrusion 51 forms an arc-shaped notch 52, and the inner wall of the circular through hole 61 has a flange 62 that is accommodated in the arc-shaped notch 52. The flange 62 and the arc-shaped notch 52 together limit the maximum stroke of the upper valve plate 4 in clockwise and counterclockwise rotation. Specifically, the motor 7 is a reversible stepper motor or servo motor. The motor 7 drives the upper valve plate 4 to rotate clockwise or counterclockwise. At the maximum stroke, the flange 62 abuts against the circumferential wall of the arc-shaped notch, thereby achieving the limiting.

[0051] As a further preferred embodiment, the water passage 41 is generally arc-shaped, and the second water inlet channel 31, the second water outlet channel 32, and the anti-scaling groove 42 are all drum-shaped with basically the same shape and size. In the first position, the upper opening plane projections of the second water inlet channel 31 and the second water outlet channel 32 are completely located within the water passage 41. In the second position, the anti-scaling groove 42 is arranged opposite to the second water inlet channel 31 to minimize the contact between wastewater and the first friction surface 30 and the second friction surface 40. Simultaneously, both the water passage 41 and the anti-scaling groove 42 are grooves that are open at the bottom and closed at the top, meaning they do not penetrate the upper valve plate 4 upwards. Furthermore, the outer periphery of the upper valve plate 4 also has an annular groove for fitting the sealing ring 8. To prevent internal leakage of the wastewater valve, the sealing ring 8 prevents leaked water from overflowing the wastewater valve and causing a risk of leakage.

[0052] Specific combination Figures 5 to 8 As shown, the sealing gasket 2 and the lower valve plate 3 are fixed in the valve cavity without circumferential rotation. The upper valve plate 4 can be switched to a first position and a second position by the forward and reverse rotation of the motor 7, corresponding to the water circuit open state and the water circuit closed state. In the water circuit open state, as shown... Figure 5 and Figure 6 As shown, wastewater flows sequentially through the second inlet channel 31 and the water tank 41 to the second outlet channel 32. This process is usually completed within 20 seconds. Impurities cannot adhere to the wastewater. When the wastewater valve is closed, as the upper valve plate 4 slides, the remaining impurities are easily scraped away by the second friction surface 40. However, in the closed state of the water circuit, as... Figure 7 and Figure 8As shown, wastewater enters the anti-scaling tank 42 through the second inlet channel 31 and no longer flows to the second outlet channel 32. Only the anti-scaling tank 42 of the upper valve plate 4 is immersed in water. This ensures that the mutual friction sealing surfaces of the upper and lower valve plates 3 are almost not in contact with water, preventing scale buildup and avoiding the problems caused by scale buildup on the friction surfaces, which could hinder the rotation of the upper valve plate 4 or scratch the friction surfaces, thus causing sealing problems. Therefore, the wastewater valve is unaffected by scale when closing and opening, preventing the valve core 5 and motor 7 from jamming after a period of use.

[0053] Example 2,

[0054] See Figures 9 to 12 As shown, the drainage device provided by the present invention includes a buffer water tank 11 and a wastewater valve as described in Embodiment 1 above. The first inlet channel 101 of the wastewater valve is connected to the outlet of the external wastewater generator 13, and the first outlet channel 102 of the wastewater valve is connected to the inside of the buffer water tank 11. The buffer water tank 11 contains wastewater input by the first outlet channel 102 and is provided with a drainage pipe 12. The upper end of the drainage pipe 12 extends upward out of the buffer water tank 11 and is connected to the external wastewater box 10 through a connecting pipe.

[0055] Based on the above technical solution, the drainage equipment includes a buffer tank 11 and a wastewater valve. The inlet and outlet of the wastewater valve are connected to the wastewater generator 13 and the buffer tank 11, respectively. The buffer tank 11 contains the wastewater that was left over from the last drainage and has been cooled. It is discharged to the wastewater box 10 through the drainage pipe 12. After the high-temperature water vapor enters the buffer tank 11, it is quickly condensed and enters the wastewater box 10 under the guidance of the drainage pipe 12 and the connecting pipe. At this time, the water temperature has been greatly reduced. After entering the wastewater box 10, there will be no high-decibel noise or steam coming out (without the buffer tank 11, the high-temperature, high-impact water vapor rushes into the wastewater box 10. The high impact force brings a sharp impact sound, and the high temperature brings a large amount of steam that instantly fills the wastewater box 10, causing its internal pressure to increase dramatically. This greatly increases the escape from the gap of the inlet to the inside and outside of the equipment, causing greater safety hazards). At this time, the user will not feel too hot when taking out the wastewater box 10.

[0056] In addition, a water level switch is installed inside the wastewater box 10 to prevent water from overflowing. A vent is also provided on the buffer tank 11 to prevent a large amount of air from accumulating at the top of the tank, which would prevent the top of the tank from being filled with wastewater.

[0057] In a preferred embodiment, a scale-inhibiting rubber 9 is also installed at the front end of the first water inlet channel 101, and the scale-inhibiting rubber 9 has a cutout 91 in the middle, and the cutout 91 has a flow state that is opened under water pressure to allow wastewater to pass through, and a closed state that inhibits scale under pressure balance. Specifically, the cut 91 can be in the shape of an "I", a "+", or an asterisk. Rubber has a much larger coefficient of expansion than scale, so scale cannot adhere to it. The cut 91 divides the scale-inhibiting rubber 9 into several parts. The rubber has excellent softness and resilience. When the wastewater valve is not draining, the pressure on both sides of the scale-inhibiting rubber 9 is the same, preventing large scale particles from passing through. This ensures the smooth flow of the wastewater valve inlet. When the wastewater valve drains, the water temperature in the wastewater generator 13 exceeds 100℃, and the internal pressure is higher than the ambient pressure. The high-temperature steam easily breaks through the scale-inhibiting rubber, pushing the deformed surface 92 to the side wall. After draining, the wastewater valve closes, the pressure at both ends of the scale-inhibiting rubber returns to normal, and the deformed surface 92 returns to its flat state, preventing large particles from passing through.

[0058] The above description is merely a preferred embodiment of the present invention and is illustrative rather than restrictive. Those skilled in the art will understand that many changes, modifications, and even equivalents can be made within the spirit and scope defined by the claims of the present invention, all of which will fall within the protection scope of the present invention.

Claims

1. A wastewater valve, comprising a valve body (1) having an internal valve cavity, a valve core (5) housed within the valve cavity, and a motor (7) mounted on the upper end of the valve body (1) for driving the valve core (5) to rotate circumferentially, wherein the valve body (1) further comprises a first inlet channel (101) and a first outlet channel (102) communicating with the valve cavity, characterized in that, The wastewater valve also includes: The lower valve plate (3) is installed in the valve cavity and its upper end face forms a first friction surface (30). It is provided with a second water inlet channel (31) connected to the first water inlet channel (101) and a second water outlet channel (32) connected to the first water outlet channel (102). The upper valve plate (4) is rotatably mounted in the valve cavity and its lower end face forms a second friction surface (40). The lower end face of the upper valve plate (4) is provided with a water groove (41) and an anti-scaling groove (42), and the upper end is connected to the valve core (5). The valve core (5) drives the upper valve plate (4) to rotate circumferentially. Furthermore, the second friction surface (40) is in close contact with the first friction surface (30). In the circumferential rotation direction, the upper valve plate (4) has a first position state that causes the second water inlet channel (31) and the second water outlet channel (32) to be simultaneously connected to the water passage (41), and a second position state that causes the second water inlet channel (31) to be connected to the anti-scaling tank (42). In the first position state, the upper opening plane projections of the second water inlet channel (31) and the second water outlet channel (32) are completely located within the water passage (41); in the second position state, the anti-scaling tank (42) is arranged opposite to the second water inlet channel (31); A sealing gasket (2) is also installed in the valve cavity below the lower valve plate (3). The sealing gasket (2) has a third water inlet channel (21) that connects the first water inlet channel (101) and the second water inlet channel (31) and a third water outlet channel (22) that connects the first water outlet channel (102) and the second water outlet channel (32) in a longitudinal direction. The inner walls of the third water inlet channel (21) and the third water outlet channel (22) are each provided with an inwardly extending annular rib (24), and the upper and lower end faces of the sealing gasket (2) are each provided with an annular upper sealing rib (25) and a lower sealing rib (26) around the third water inlet channel (21) and the third water outlet channel (22); and the compression of the lower sealing rib (26) is greater than the compression of the upper sealing rib (25).

2. The wastewater valve as described in claim 1, characterized in that, The valve body (1) is fitted with a pressure cap (6) at the open end. In the assembled state, the upper and lower ends of the valve core (5) abut against the pressure cap (6) and the upper valve plate (4) respectively. The sealing gasket (2) is elastic in the longitudinal direction and has an elastic force that causes the lower valve plate (3) to press against the upper valve plate (4) upward.

3. The wastewater valve as described in claim 2, characterized in that, The valve cavity has a limiting hole (103) on its inner bottom surface. The lower end of the sealing gasket (2) has a positioning protrusion (23) that is opposite to and matches the shape of the limiting hole (103) to limit the installation of the sealing gasket (2) in the valve cavity.

4. The wastewater valve as described in claim 1, characterized in that, The inner wall of the valve cavity has an upper opening notch (104), and the outer edge of the lower valve plate (3) has a limiting protrusion (33) that matches the shape of the notch (104), which is used to limit the circumferential rotation tendency of the lower valve plate (3) by holding it in the notch (104) through the limiting protrusion (33).

5. The wastewater valve as described in claim 2, characterized in that, The compression cap (6) has a circular through hole (61) in the middle. The upper end of the valve core (5) also has a circular protrusion (51) that passes through the circular through hole (61). The outer edge of the circular protrusion (51) forms an arc-shaped notch (52). The inner wall of the circular through hole (61) has a flange (62) that is accommodated in the arc-shaped notch (52). The flange (62) and the arc-shaped notch (52) together limit the maximum stroke of the upper valve plate (4) to rotate clockwise and counterclockwise.

6. The wastewater valve as described in claim 1, characterized in that, The outer periphery of the upper valve plate (4) also has an annular groove for fitting a sealing ring (8).

7. A drainage device, characterized in that, Includes a buffer tank (11) and a wastewater valve as described in any one of claims 1 to 6 above, wherein the first inlet channel (101) of the wastewater valve is connected to the outlet of an external wastewater generator (13), and the first outlet channel (102) of the wastewater valve is connected to the interior of the buffer tank (11). The buffer tank (11) contains wastewater input from the first outlet channel (102) and is provided with a drain pipe (12). The upper end of the drain pipe (12) extends upward through the buffer tank (11) and is connected to an external wastewater box (10) through a connecting pipe. The front end of the first water inlet channel (101) is also equipped with scale-inhibiting rubber (9), the scale-inhibiting rubber (9) has a cut (91) in the middle, and the cut (91) has a flow state that allows wastewater to pass through when it is opened under water pressure impact, and a closed state that inhibits scale under pressure balance.

Images