Water heater sewage discharge device and water heater

Abstract

The present invention relates to a water heater sewage discharge device and a water heater, comprising a valve seat, a valve body, and a valve core. The valve seat is fixed at the sewage outlet of the water heater inner tank, a magnesium rod mounting bracket is mounted on the valve seat, the valve body is connected to the valve seat, the valve core is mounted within the valve body, and a rotating mechanism is movably mounted on the valve body. The rotating mechanism drives the valve core to connect or disconnect the water flow channel connecting the water heater inner tank with the drainage outlet. The present invention is not only simple in structure, but also can easily and quickly drain water and impurities from the water heater inner tank without removing the magnesium rod, thereby draining and cleaning the interior of the water heater. The operation is simple and convenient, and the use is safe and reliable.

Description

Technical Field

[0001] The invention relates to a water heater, in particular to a sewage discharge device installed on the water heater, belonging to the technical field of electric water heaters. Background Art

[0002] In order to ensure the hot water output rate, electric water heaters generally discharge water smoothly from the top, resulting in poor water fluidity at the bottom of the inner tank. After a period of use, a lot of scale and impurities will be deposited at the bottom of the inner tank. Long-term accumulation of scale will cause the water quality to deteriorate, and water with poor water quality will be retained at the bottom of the inner tank for a long time, forming a vicious circle. In severe cases, it will cause skin diseases, so regular drainage and cleaning are required.

[0003] While commercially available water heaters have a built-in drain outlet, these outlets are typically sealed with a locking plug or a magnesium rod, making it difficult for ordinary consumers to drain the waste themselves. This requires a professional visit, a complex and costly maintenance process. Alternatively, some water heaters may have a drain valve, but the structure is complex, expensive, and takes up a lot of space, making the overall water heater appear bulky and unpleasant to the user. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a water heater sewage discharge device with a simple structure and good operability, and at the same time provide a water heater equipped with the sewage discharge device.

[0005] To achieve the above object, the technical solution of the present invention is:

[0006] A water heater sewage discharge device includes a valve seat, a valve body and a valve core, the valve seat is fixed at the sewage discharge outlet of the water heater inner tank, a magnesium rod mounting bracket is installed on the valve seat, the valve body is connected to the valve seat, the valve core is installed in the valve body, and a rotating mechanism is movably installed on the valve body, the rotating mechanism drives the valve core to connect or disconnect the water flow channel connecting the water heater inner tank with the drainage outlet.

[0007] Furthermore, the valve core includes stacked moving plates and static plates, and connecting ports forming water flow channels are provided on the static plates and the moving plates. The static plates are fixedly installed in the valve body, and the moving plates rotate relative to the static plates to connect or disconnect the water flow channels.

[0008] Furthermore, at least one set of limiting grooves and limiting protrusions are correspondingly provided on the inner wall of the valve body and the outer circumferential surface of the static piece, and the limiting protrusions are correspondingly inserted into the limiting grooves to fix the static piece in the valve body.

[0009] Furthermore, the rotating mechanism is a rotating ring, which is sleeved on the outside of the valve body. The rotating ring and the valve core are connected by a connecting component. An opening for the connecting component to pass through is provided on the valve body, and the connecting component can move in the opening.

[0010] Furthermore, the rotating ring is composed of two separate parts, and the two separate parts are fixedly connected by a snap-fit structure.

[0011] Furthermore, a protrusion, a groove or a tooth-shaped structure for rotating the rotating ring is provided on the outer peripheral surface of the rotating ring.

[0012] Furthermore, the sewage discharge device also includes a handle, which is fixedly connected or detachably connected to the rotating mechanism, and the handle drives the rotating mechanism to rotate.

[0013] Furthermore, the handle is installed below the valve body, a through hole forming the water flow channel is provided on the handle, and the bottom of the handle is a drain outlet.

[0014] Furthermore, a concave accommodating cavity is provided at the top of the handle, and the bottom of the valve body is inserted into the accommodating cavity after installation. A sliding mechanism is correspondingly provided between the side wall of the accommodating cavity and the valve body for limiting the relative rotation between the handle and the valve body.

[0015] Another technical solution of the present invention is:

[0016] A water heater is provided with the sewage discharge device as described above.

[0017] To sum up, the present invention provides a water heater drain device and a water heater, which adds a simple-structured drain device at the original drain outlet of the water heater. The drain device combines the magnesium rod and the drain function well. It is not only simple in structure, but also can easily and quickly drain water and impurities in the water heater tank without removing the magnesium rod, and drain and clean the inside of the water heater. It is simple and convenient to operate, and safe and reliable to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural diagram of the first embodiment of the water heater of the present invention (after the handle is installed);

[0019] Figure 2 This is a schematic structural diagram of a water heater according to a first embodiment of the present invention (without a handle installed);

[0020] Figure 3 This is a schematic structural diagram of a sewage discharge device according to an embodiment of the present invention;

[0021] Figure 4 This is an exploded view of the structure of a sewage discharge device according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the valve core structure of Example 1 of the present invention;

[0023] Figure 6 This is a schematic diagram of the structure of a rotating ring according to an embodiment of the present invention;

[0024] Figure 7 This is a schematic structural diagram of a handle according to an embodiment of the present invention;

[0025] Figure 8 It is a structural diagram of the handle of the second embodiment of the present invention.

[0026] like Figures 1 to 8 As shown, the shell 1, the inner tank 2, the drain outlet 3, the magnesium rod 4, the drain device 5, the valve seat 6, the valve body 7, the valve core 8, the rotating mechanism 9, the handle 10, the magnesium rod bracket 11, the water flow channel 12, the mounting platform 13, the mounting hole 14, the water hole 15, the external thread 16, the connecting seat 17, the first sealing ring 18, the hexagonal nut 19, the internal thread 20, the external thread 21, the second sealing ring 22, the first static plate 23, the moving plate 24, the second static plate 25, the communicating port 26, the limiting groove 27, the limiting protrusion 28, the rotating ring 29, the opening 30, the connecting protrusion 31, the connecting socket 32, the clamping structure 33, the clamping groove 34, the insert 35, the blade 36, the through hole 37, the accommodating chamber 38, the drain joint 39, the slot 40, the limiting slide groove 41, the slider 42, the limiting platform 43, the marble 44, the third sealing ring 45, and the fourth sealing ring 46. DETAILED DESCRIPTION

[0027] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0028] Example 1:

[0029] like Figure 1 and Figure 2 As shown, the present invention provides a water heater, including a shell 1, an inner tank 2 is installed in the shell 1, a sewage outlet 3 is provided at the bottom of the inner tank 2, a magnesium rod 4 is installed in the inner tank 2, a sewage outlet 5 is installed at the sewage outlet 3, the magnesium rod 4 is fixedly installed on the sewage outlet 5, and the bottom of the sewage outlet 5 is a drainage outlet for discharging sewage.

[0030] like Figure 3 and Figure 4As shown, the sewage discharge device 5 includes a valve seat 6, a valve body 7, a valve core 8, a rotating mechanism 9, a handle 10 and a magnesium rod mounting bracket 11. The magnesium rod mounting bracket 11 is installed above the valve seat 6, and the magnesium rod 4 is fixedly mounted on the magnesium rod mounting bracket 11. The valve seat 6 is fixed at the sewage outlet 3 of the water heater inner tank 2. The valve body 7 is connected to the valve seat 6, and the valve core 8 is installed in the valve body 7. The rotating mechanism 9 is installed on the valve body 7. The rotating mechanism 9 drives the valve core 8 to connect or disconnect the water flow channel 12 connecting the inner tank 2 of the water heater with the drain outlet. The sewage in the inner tank 2 flows out from the drain outlet at the bottom through the water flow channel 12.

[0031] like Figure 3 and Figure 4 As shown, the magnesium rod mounting bracket 11 adopts a gate-shaped structure, with a circular mounting platform 13 at the top of the magnesium rod mounting bracket 11, and a mounting hole 14 at the center of the mounting platform 13. The bottom of the magnesium rod 4 is fixedly mounted in the mounting hole 14. The circular mounting platform 13 structure improves the structural strength of the magnesium rod mounting bracket 11 and enhances the load-bearing capacity of the magnesium rod mounting bracket 11.

[0032] The bottom of the magnesium rod mounting bracket 11 is fixed to the valve seat 6. A through-hole is formed in the center of the valve seat 6 as part of the water flow channel 12. The gate-shaped magnesium rod mounting bracket 11 forms a water passage 15 that communicates with the water flow channel 12 of the valve seat 6. To simplify the structure and improve its manufacturability, in this embodiment, the magnesium rod mounting bracket 11 and the valve seat 6 are preferably integrated. The combination of the magnesium rod mounting bracket 11 and the valve seat 6 not only facilitates the installation of the magnesium rod 4, but also enables sewage discharge, simplifying the structure of the sewage discharge device.

[0033] The upper part of the valve seat 6 has an external thread 16, which cooperates with the internal thread of the connecting seat 17 at the drain outlet 3 of the inner tank 2. The valve seat 6 is fixed to the drain outlet 3 of the inner tank 2 by threads. The fixed connection is very convenient, which is conducive to disassembly and assembly, and convenient for the replacement of the magnesium rod 4. A first sealing ring 18 is installed between the valve seat 6 and the connecting seat 17 to achieve a sealed connection between the valve seat 6 and the drain outlet 3. The middle part of the valve seat 6 is a structure of a hexagonal nut 19, which is convenient for the disassembly and assembly of the valve seat 6. The bottom of the valve seat 6 has an internal thread 20, which is used to be fixedly connected to the valve body 7. The valve seat 6 and the valve body 7 are detachably connected by threads, which is conducive to disassembly and assembly and convenient for daily maintenance.

[0034] like Figure 3 and Figure 4 As shown, the valve body 7 is a cylindrical structure that runs through the top and bottom. There is an external thread 21 on the top of the valve body 7. The external thread 21 cooperates with the internal thread 20 at the bottom of the valve seat 6 to achieve a detachable connection between the valve body 7 and the valve seat 6. Figure 4As shown, a second sealing ring 22 is provided between the top of the valve body 7 and the inner wall of the valve seat 6. During installation, the top of the valve body 7 presses the second sealing ring 22 to achieve a sealed connection between the valve body 7 and the valve seat 6, thereby preventing water leakage during drainage.

[0035] like Figure 3 、 Figure 4 and Figure 5 As shown, the valve core 8 includes a static piece and a dynamic piece, which are stacked together. The dynamic piece can rotate relative to the static piece, thereby connecting or disconnecting the water flow channel 12. In this embodiment, the valve core 8 is preferably provided with a first static piece 23, a dynamic piece 24, and a second static piece 25 in order from top to bottom. The first static piece 23, the dynamic piece 24, and the second static piece 25 are stacked together and installed in the valve body 7. A fourth sealing ring 46 is installed between the bottom of the valve core 8 and the valve body 7 to achieve a seal between the valve core 8 and the valve body 7.

[0036] Each of the first static plate 23, the movable plate 24, and the second static plate 25 is provided with at least one communication opening 26 that forms the water flow channel 12. In this embodiment, the communication openings 26 on each of the first static plate 23, the movable plate 24, and the second static plate 25 are preferably two symmetrically arranged, roughly fan-shaped communication openings 26, with the two communication openings 26 on the first static plate 23 and the second static plate 25 correspondingly arranged. The movable plate 24 is rotatable relative to the first static plate 23 above and the second static plate 25 below. When the communication opening 26 on the movable plate 24 is rotated to a position opposite the communication openings 26 on the first static plate 23 and the second static plate 25, the water flow channel 12 is connected, i.e., the position for wastewater discharge. When the movable plate 24 is rotated so that the communication opening 26 therein is offset from the communication openings 26 on the first static plate 23 and the second static plate 25, the water flow channel 12 is disconnected, i.e., the position for normal operation of the water heater. The effective combination of the movable plate 24 and the first and second static plates 23, 25 allows for easy wastewater discharge from the water heater.

[0037] like Figure 4 and Figure 5 As shown, at least one set of limiting grooves 27 is provided on the inner wall of the valve body 7. In this embodiment, two sets of limiting grooves 27 are preferably symmetrically provided. Each set of limiting grooves 27 includes two upper and lower sets corresponding to the first static piece 23 and the second static piece 25, respectively. Two limiting protrusions 28 are provided on the outer circumferential surfaces of the first static piece 23 and the second static piece 25, respectively. The limiting protrusions 28 are inserted into the limiting grooves 27 to achieve a fixed connection between the first static piece 23, the second static piece 25 and the valve body 7. The limiting grooves 27 extend in the vertical direction. During installation, the second static piece 25 is inserted into the valve body 7 from the top, and then the dynamic piece 24 is installed. Finally, the first static piece 23 is inserted into the valve body 7 from the top. Assembly is simple and convenient, which can ensure installation accuracy and improve assembly efficiency.

[0038] like Figure 3 and Figure 4 As shown, in this embodiment, the rotating mechanism 9 is a rotating ring 29, which is mounted on the outside of the valve body 7 at a position corresponding to the position of the moving plate 24. The rotating ring 29 and the moving plate 24 are connected by a connecting assembly, and the connecting assembly is at least one set, such as Figure 4 As shown, the valve body 7 is provided with at least one elongated opening 30 extending horizontally. The connecting assembly passes through one of the elongated openings 30. When the movable plate 24 rotates, the connecting assembly can move within the opening 30, and the elongated opening 30 provides a sliding track for the connecting assembly. For ease of installation, in this embodiment, two elongated openings 30 are preferably symmetrically provided on the valve body 7, and two sets of connecting assemblies can also be symmetrically provided.

[0039] like Figure 4 and Figure 6 As shown, the connection assembly between the rotating ring 29 and the rotor 24 comprises a connecting protrusion 31 mounted on the inner wall of the rotating ring 29 and a connecting socket 32 provided on the rotor 24. The connecting protrusion 31 projects toward the central axis of the rotating ring 29 and is integrally formed with the rotating ring 29. After installation, the connecting protrusion 31 on the rotating ring 29 passes through the elongated opening 30 in the valve body 7 and is correspondingly inserted into the connecting socket 32 on the rotor 24. In this way, rotation of the rotating ring 29 drives the rotor 24 to rotate. For ease of installation, in this embodiment, two connecting sockets 32 are preferably provided symmetrically on the rotor 24.

[0040] like Figure 4 and Figure 6 As shown, the rotating ring 29 can have a solid annular structure. However, for ease of installation, in this embodiment, the rotating ring 29 preferably comprises two separate parts, which are fixedly connected by a snap-fit structure 33. The snap-fit structure 33 includes a vertically extending slot 34 provided at the opening of one rotating ring 29, and an outwardly protruding vertically extending insert 35 provided at the opening of the other rotating ring 29. During installation, the two rotating rings 29 are wrapped around the valve body 7, and then the two inserts 35 at the opening of one part are correspondingly inserted into the two slots 34 at the opening of the other part. This completes the installation of the rotating ring 29, making installation simple and quick.

[0041] like Figure 4 and Figure 7 As shown, the sewage discharge device also includes a handle 10, which is detachably connected to the rotating mechanism 9. The handle 10 drives the rotating mechanism 9 to rotate. Figure 1 and Figure 2As shown, the handle 10 can be removed from the valve body 7 when sewage discharge is not required. Only when sewage discharge is required, the user can connect the handle 10 to the valve body 7 by himself, and rotate the handle 10 to open the water flow channel 12 to discharge the sewage. This is not only convenient for operation, but also avoids changes in the water heater production process, improving the production process of the water heater. At the same time, it greatly reduces the volume of the sewage discharge device, thereby reducing the overall volume of the water heater, increasing the sewage discharge function while not affecting the aesthetics of the water heater. The handle 10 can also be connected to the rotating mechanism 9 in a fixed connection manner. The handle 10 is not removed from the rotating ring 29 and is always installed on the valve body 7.

[0042] like Figure 4 and Figure 7 As shown, the handle 10 has a roughly T-shaped cross-section and is installed below the valve body 7. To facilitate the operator's grip on the handle 10, three or four blades 36 are circumferentially arranged on the lower half of the handle 10. The operator pulls the blades 36 to rotate the handle 10, thereby driving the rotation of the movable plate 24. The handle 10 has a through-hole 37 extending through the center. The through-hole 37 forms a portion of the water flow channel 12. The bottom of the through-hole 37 serves as the drain port. The bottom of the valve body 7 has a converging portion that, after installation, is inserted into the top of the through-hole 37 of the handle 10. A third sealing ring 45 is provided between the bottom of the valve body 7 and the through-hole 37 of the handle 10 to seal the valve body 7 and the handle 10 after installation.

[0043] The top of the handle 10 has a recessed receiving cavity 38, into which the bottom of the valve body 7 is inserted after installation. The bottom of the handle 10 is connected to a drain connector 39, which is connected to a drain pipe (not shown). To simplify the structure, the drain connector 39 and the handle 10 are designed as an integrated structure.

[0044] like Figure 4 and Figure 7 As shown, the handle 10 and the rotating ring 29 are connected by a removable plug-in structure. An elongated slot 40 is provided on the sidewall of the accommodating cavity 38 at the top of the handle 10. The slot 40 is an upward-opening notch. There can be only one slot 40 or two symmetrical slots 40. When drainage is required, the user slides the handle 10 upward onto the bottom of the valve body 7 and inserts the two slots 40 into the corresponding snap-fit structures 33 on the rotating ring 29. The slots 40 cooperate with the snap-fit structures 33, so that the rotating ring 29 rotates synchronously with the handle 10. If the rotating ring 29 adopts a monolithic structure, one or two inserts can be provided on the outer circumference of the rotating ring 29. After the handle 10 is installed, the inserts are inserted into the slots 40 on the handle 10, achieving synchronous rotation of the rotating ring 29 and the handle 10.

[0045] like Figure 4 and Figure 6As shown, the cross section of the rotating ring 29 is an inverted L-shape. Thus, when the handle 10 is installed, the outwardly protruding portion of the rotating ring 29 can limit the installation height of the handle 10, making the operation more accurate and convenient.

[0046] A sliding mechanism is provided between the side wall of the accommodating chamber 38 and the valve body 7 to limit the relative rotation between the handle 10 and the valve body 7. Figure 4 and Figure 7 As shown, the sliding mechanism includes a horizontal limiting groove 41 provided on the inner surface of the side wall of the accommodating cavity 38 and a corresponding protruding slider 42 provided on the outer surface of the valve body 7. Preferably, two sets of limiting grooves 41 and sliders 42 are symmetrically provided. When the handle 10 is installed on the valve body 7 and rotated, the two sliders 42 slide in the two limiting grooves 41 respectively, ensuring that the handle 10 is stable and will not fall off during the rotation process. The limiting groove 41 is open at one end and closed at the other end to prevent the slider 42 from sliding out of the limiting groove 41. A limiting platform 43 is also provided at one end of the opening of the limiting groove 41. The limiting platform 43 has a distance from the end of the limiting groove 41. The distance matches the width of the slider 42, which facilitates the smooth insertion of the slider 42 into the limiting groove 41 and can limit the rotation direction of the handle 10.

[0047] A marble 44 is provided on the upper surface of the bottom wall of the accommodating chamber 38, and correspondingly, a circular recessed hole (not shown in the figure) is provided on the bottom of the valve body 7. Through the cooperation between the marble 44 and the recessed hole, the operator is prompted by sound and touch to change the gear position when the handle 10 is rotated.

[0048] When sewage needs to be discharged, the user inserts the handle 10 upward from the bottom of the valve body 7, inserts the bottom of the valve body 7 into the accommodating cavity 38 at the top of the handle 10, and at the same time, the slot 40 at the top of the handle 10 is correspondingly plugged into the two clamping structures 33 on the rotating ring 29. At this time, the slider 42 on the valve body 7 is facing the opening of the limiting slide groove 41 on the handle 10. Rotate the handle 10, and the slider 42 slides in the limiting slide groove 41. At the same time, the handle 10 drives the rotating ring 29 to rotate, and the rotating ring 29 drives the movable plate 24 to rotate. At this time, the connecting protrusion 31 on the rotating ring 29 slides in the long strip opening 30 of the valve body. The movable plate 24 rotates to connect the two connecting ports 26 on the movable plate 24 with the two connecting ports 26 on the first static plate 23 and the second static plate 25, thereby opening the water flow channel 12. The sewage in the inner tank 2 passes through the water hole 15 on the magnesium rod mounting bracket 11, the through hole on the valve seat 6, the connecting port 26 on the valve core 8, the through hole 37 in the handle 10 and the drain joint 39 in sequence and enters the drain pipe for discharge.

[0049] After the sewage is discharged, the handle 10 is rotated in the opposite direction so that the communication opening 26 of the movable plate 24 is offset from the communication openings 26 on the first and second static plates 23 and 25, thereby disconnecting the water flow channel 12. At this time, the slider 42 on the valve body 7 is released from the limiting groove 41 on the handle 10, and the handle 10 can be removed by applying downward force.

[0050] After installation, the valve seat 6 is fixed to the inner tank 2, the valve body 7 extends through the opening at the bottom of the water heater housing 1, and the rotating ring 29 is located outside the housing 1 for easy operation. The user simply installs the handle 10 on the valve body 7 and rotates the handle 10 to rotate the movable plate 24, realizing both the water heater draining and normal operation.

[0051] The present invention adds a simple-structured sewage discharge device at the original sewage outlet of the water heater. The sewage discharge device combines the magnesium rod and the sewage discharge function well. It is not only simple in structure, but also can easily and quickly discharge water and impurities in the water heater tank without removing the magnesium rod 4, and clean the sewage inside the water heater. It is simple and convenient to operate and safe and reliable to use.

[0052] The valve body 7 and the handle 10 in the sewage discharge device are of split design. The handle 10 can be removed from the sewage discharge device when sewage is not discharged. This not only avoids changes in the production process of the water heater and improves its processability, but also greatly reduces the volume of the sewage discharge device, thereby reducing the overall volume of the water heater. While increasing the sewage discharge function, it does not affect the aesthetics of the water heater.

[0053] Example 2:

[0054] like Figure 8 As shown, the difference from the first embodiment is that the handle 10 is an overall cylindrical structure, installed below the valve body 7. Its length is approximately the width of a hand, making it easy for the user to grip and rotate. The outer surface of the handle 10 may also be provided with protrusions, grooves, or tooth-shaped structures to facilitate gripping. The top of the handle 10 has a concave accommodating cavity 38, into which the bottom of the valve body 7 is inserted after installation. The bottom of the handle 10 is connected to a drain connector 39, which is an integrated structure with the handle 10.

[0055] In order to simplify the manufacturing process, the handle 10 adopts a structure of two separate parts, the upper and lower parts, which are fixed together by screws.

[0056] Example 3:

[0057] The difference from the first and second embodiments is that the handle 10 is omitted, and a protrusion, groove, or tooth-shaped structure for rotating the rotating ring 29 is provided on the outer circumference of the rotating ring 29. When drainage is required, the operator directly rotates the rotating ring 29, thereby driving the movable plate 24 to rotate, connecting or disconnecting the water flow channel 12. In this case, the bottom of the valve body 7 is a drain outlet, and a drain connector is integrally provided at the drain outlet.

[0058] Example 4:

[0059] The difference from Example 1 and Example 2 is that the rotating ring 29 in Example 1 and Example 2 is omitted, and the rotating mechanism that drives the movable plate 24 to rotate is an outward-protruding connecting piece (not shown in the figure) arranged on the outer peripheral surface of the movable plate 24. Two connecting pieces are symmetrically arranged, and the two connecting pieces pass through the two long strip openings 30 on the valve body 7 respectively. The slot 40 on the handle 10 is directly plugged into and matched with the connecting piece on the movable plate 24. When the handle 10 rotates, it directly drives the movable plate 24 to rotate, thereby realizing the connection or disconnection of the water flow channel 12.

[0060] In order to facilitate the installation of the movable plate 24, the connecting piece can be used as an independent part. After the movable plate 24 is installed, the connecting piece is inserted into the connecting socket 32 on the movable plate 24 through the long strip opening 30 on the valve body 7.

[0061] As described above, similar technical solutions can be derived from the solutions shown in the accompanying drawings. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A water heater sewage discharge device, characterized in that: The invention comprises a valve seat, a valve body and a valve core, wherein the valve seat is fixed at the drain outlet of the water heater tank, a magnesium rod mounting bracket is mounted on the valve seat, the valve body is connected to the valve seat, the valve core is mounted in the valve body, and a rotating mechanism is movably mounted on the valve body, the rotating mechanism drives the valve core to connect or disconnect the water flow channel connecting the water heater tank and the drain outlet; The rotating mechanism is a rotating ring, which is sleeved on the outside of the valve body. The rotating ring and the valve core are connected by a connecting assembly. The valve body is provided with an opening for the connecting assembly to pass through. The connecting assembly can move in the opening. The connecting assembly is a connecting protrusion installed on the inner wall of the rotating ring and a connecting socket provided on the movable plate. The connecting protrusion protrudes toward the central axis of the rotating ring. The connecting protrusion and the rotating ring are integrally formed. The connecting protrusion passes through the opening on the valve body and is correspondingly inserted into the connecting socket on the movable plate. The sewage discharge device also includes a handle, which is installed below the valve body and is detachably connected to the rotating ring. The handle drives the rotating ring to rotate. A through hole forming a water flow channel is provided on the handle. The bottom of the valve body is inserted into the through hole. The bottom of the handle is a drain outlet. There is a concave accommodating cavity at the top of the handle, and a long strip slot is provided on the side wall of the accommodating cavity. The slot corresponds to the clamping structure on the rotating ring and is inserted so that the rotating ring rotates synchronously when the handle rotates. A sliding mechanism for limiting the relative rotation between the handle and the valve body is provided between the side wall of the accommodating cavity and the valve body. The sliding mechanism includes a horizontal limiting groove provided on the inner surface of the side wall of the accommodating cavity and a protruding slider provided on the outer surface of the valve body. One end of the limiting groove is open and the other end is closed. When the handle is installed on the valve body and rotates, the slider slides in the limiting groove.

2. A water heater sewage discharge device according to claim 1, characterized in that: The valve core includes a stacked moving plate and a static plate, and a connecting port forming a water flow channel is provided on the static plate and the moving plate. The static plate is fixedly installed in the valve body, and the moving plate rotates relative to the static plate to connect or disconnect the water flow channel.

3. A water heater sewage discharge device according to claim 2, characterized in that: At least one set of limiting grooves and limiting protrusions are correspondingly provided on the inner wall of the valve body and the outer circumferential surface of the static piece. The limiting protrusions are correspondingly inserted into the limiting grooves to fix the static piece in the valve body.

4. A water heater sewage discharge device according to claim 1, characterized in that: The rotating ring is composed of two separate parts, which are fixedly connected by a clamping structure.

5. A water heater sewage discharge device according to claim 1, characterized in that: The outer circumferential surface of the rotating ring is provided with a protrusion, a groove or a tooth-shaped structure for rotating the rotating ring.

6. A water heater, characterized in that: A water heater sewage discharge device according to any one of claims 1 to 5 is installed.

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