A self-cleaning sewage valve

Abstract

The present invention relates to the field of valve technology, and specifically to a self-cleaning sewage valve, comprising a valve body and a valve core, wherein a channel for fluid flow is arranged in the valve body, the valve core can be rotatably and slidably arranged inside the valve body along a direction perpendicular to the flow direction of the fluid, the valve core can slide along the flow direction of the fluid, and the valve core is used to close or open the fluid channel in the valve body, the self-cleaning sewage valve has a closed state and an open state, when the cleaning sewage valve switches between the open state and the closed state, the valve core realizes the exchange of the inlet sealing surface of the valve core and the outlet sealing surface of the valve core under the action of external force, so that on the one hand, impurities adhered to the inlet sealing surface and the outlet sealing surface can be washed away under the action of the flow of the fluid, and on the other hand, the valve core can always be in close contact with the valve body under the action of the flow of the fluid, and when the valve core slides along a direction perpendicular to the flow direction of the fluid, impurities on the surface of the valve core and the connection between the valve core and the valve body can be scraped off.

Description

Technical Field

[0001] The invention relates to the technical field of valves, in particular to a self-cleaning sewage valve. Background Art

[0002] Valves are control components in fluid delivery systems and have functions such as shutoff, regulation, flow diversion, backflow prevention, pressure stabilization, flow diversion or overflow pressure relief.

[0003] The Chinese invention patent with publication number CN104235407A discloses a sealing valve, which controls the flow rate of the fluid inside the pipeline by controlling the movement of the valve core when in use. Therefore, the valve core is in contact with the fluid inside the pipeline for a long time, and impurities in the fluid are easily attached to the surface of the valve core. When the valve core is moving, it is also very likely to scrape the impurities to the two sealing surfaces of the valve seat. Over time, impurities will accumulate at the contact between the valve core and the two sealing surfaces of the valve seat. The impurities have different shapes and are likely to squeeze the two sealing surfaces of the valve seat to deform, thereby affecting the sealing between the two sealing surfaces of the valve core and the valve seat, and then affecting the ability of the valve to cut off the fluid. At present, the fluid is generally cut off manually first, and then the valve is disassembled, and then the valve is cleaned and maintained manually, and finally the valve is installed back to its original position. The overall operation is relatively troublesome, and during the cleaning and maintenance of the valve, the fluid cannot be transported in the pipeline, which affects the fluid transportation efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a self-cleaning drain valve to address the problem that the operation in the current valve cleaning process is relatively troublesome and affects the fluid delivery efficiency.

[0005] The above purpose is achieved through the following technical solutions:

[0006] A self-cleaning sewage valve, the self-cleaning sewage valve comprising:

[0007] A valve body, wherein a passage for fluid flow is provided in the valve body;

[0008] A valve core, which can be slidably disposed inside the valve body in a direction perpendicular to the flow direction of the fluid to close or open the fluid passage in the valve body;

[0009] The valve core can rotate inside the valve body to achieve the exchange of the inlet sealing surface of the valve core and the outlet sealing surface of the valve core;

[0010] The valve core can slide along the flow direction of the fluid so that in the process of closing or opening the fluid channel in the valve body, the valve core and the inner wall surface of the valve body abut against each other under the action of the flow of the fluid and scrape off impurities adhering to the valve core and the valve body.

[0011] Furthermore, the self-cleaning sewage valve also includes a valve stem, which is inserted into the interior of the valve body, and one end of the valve stem close to the fluid channel is connected to the valve core, and the valve stem is used to drive the valve core to move.

[0012] Furthermore, a spiral portion is provided at one end of the valve stem away from the valve core; the self-cleaning sewage valve also includes a handwheel, which is rotatably provided on the valve body, and the handwheel and the spiral portion are matched in a spiral manner; a guide structure is provided in the valve body, and the guide structure includes a first vertical portion, an ascending portion, a descending portion and a second vertical portion connected in sequence, the first vertical portion is used to limit the rotation of the valve core in the process of the valve core opening the fluid channel in the valve body; the ascending portion is used to guide the rotation of the valve core when the valve core is separated from the first vertical portion; the descending portion is used to guide the rotation of the valve core when the valve core is separated from the ascending portion; the second vertical portion is used to limit the rotation of the valve core in the process of the valve core closing the fluid channel in the valve body.

[0013] Furthermore, the self-cleaning sewage valve also includes a first elastic member, one end of which is arranged on the valve stem, and the other end of which is arranged on the valve core.

[0014] Furthermore, a scraper is provided on the valve core, and the scraper can slide along the flow direction of the fluid, and the scraper is used to scrape off impurities adhered to the valve core.

[0015] Furthermore, a locking assembly is provided on the valve core, and the locking assembly is used to lock or unlock the position of the scraper on the valve core.

[0016] Furthermore, the locking assembly includes an upper top block, a lower top block, a second elastic member and a connecting rod, and the upper top block and the lower top block can be slidably arranged on the valve core in a direction perpendicular to the flow direction of the fluid, and the upper top block and the lower top block are connected by the second elastic member and the connecting rod, and the number of the connecting rods is two and they are cross-arranged; when the valve core closes the fluid channel, the lower top block abuts against the valve body and drives the upper top block to move toward the lower top block through the connecting rod, and under the action of the flow of the fluid, the scraper passes over the upper top block and moves from one end of the valve core to the other end.

[0017] Furthermore, the inlet sealing surface of the valve core and the outlet sealing surface of the valve core are both wedge-shaped surfaces that are inclined relative to the fluid channel.

[0018] The beneficial effects of the present invention are:

[0019] The present invention relates to a self-cleaning sewage drain valve. When the self-cleaning sewage drain valve is switched between an open state and a closed state, the valve core can realize the exchange of the inlet sealing surface of the valve core and the outlet sealing surface of the valve core under the action of external force, so that on the one hand, impurities adhering to the inlet sealing surface and the outlet sealing surface can be washed away under the flow action of the fluid, and on the other hand, the valve core can always be in close contact with the valve body under the flow action of the fluid. When the valve core slides in a direction perpendicular to the flow direction of the fluid, impurities on the surface of the valve core and the connection between the valve core and the valve body can be scraped off, so as to avoid that these impurities affect the sealing performance of the self-cleaning sewage drain valve, and at the same time reduce the fluid entering into the valve body from the connection between the valve core and the valve body, so as to avoid that the fluid brings impurities on the outlet sealing surface of the valve core back into the valve body or the inlet sealing surface of the valve core.

[0020] Furthermore, by arranging a scraper on the valve core, and the scraper can slide along the flow direction of the fluid, when the self-cleaning sewage valve switches between the open state and the closed state, the scraper can move from one end of the valve core to the other end under the action of the fluid flow, thereby scraping off the impurities previously accumulated inside the valve core, thereby preventing these impurities from affecting the sealing of the self-cleaning sewage valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A schematic diagram of the three-dimensional structure of a self-cleaning sewage valve provided in one embodiment of the present invention;

[0022] Figure 2 A schematic side view of the structure of a self-cleaning sewage valve provided in one embodiment of the present invention;

[0023] Figure 3 for Figure 2 The AA section view of the self-cleaning drain valve shown;

[0024] Figure 4 for Figure 3 The schematic diagram of the partial enlarged structure of the self-cleaning sewage valve at position B shown;

[0025] Figure 5 for Figure 3 The schematic diagram of the partial enlarged structure of the self-cleaning sewage valve at position C shown;

[0026] Figure 6 A schematic diagram of the exploded structure of parts of a self-cleaning sewage valve provided in one embodiment of the present invention;

[0027] Figure 7 A schematic diagram of the assembly structure of a valve core and a valve stem of a self-cleaning sewage valve provided in one embodiment of the present invention;

[0028] Figure 8 A schematic cross-sectional view of the assembly of a valve core and a valve stem of a self-cleaning sewage valve provided by an embodiment of the present invention;

[0029] Fig. 9 A schematic cross-sectional view of a valve body of a self-cleaning sewage valve provided in one embodiment of the present invention Figure 1 ;

[0030] Fig.10 A schematic cross-sectional view of a valve body of a self-cleaning sewage valve provided in one embodiment of the present invention Figure 2 .

[0031] in:

[0032] 100, hand wheel; 101, wheel frame; 102, connecting seat;

[0033] 200, valve stem; 201, first compression spring; 202, convex block;

[0034] 300, valve body; 310, guide structure; 311, first vertical section; 312, ascending section; 313, descending section; 314, second vertical section;

[0035] 400, valve core; 401, guide block; 402, slide groove; 410, scraper; 420, locking assembly; 421, upper top block; 422, lower top block; 423, connecting rod; 424, second compression spring;

[0036] 500, valve cover;

[0037] 600, mounting frame; 601, clamping block; 602, first retaining ring; 603, first rubber ring; 604, second retaining ring; 605, second rubber ring; 606, pressing ring; 607, pressing block. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0040] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect 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.

[0041] like Figures 1 to 10 As shown, a self-cleaning sewage valve provided by an embodiment of the present invention is configured to include a valve body 300 and a valve core 400. A channel for fluid flow is provided in the valve body 300, and the valve core 400 can be slidably arranged inside the valve body 300 along a direction perpendicular to the flow direction of the fluid to close or open the fluid channel in the valve body 300; the valve core 400 can rotate inside the valve body 300 to achieve the exchange of the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400; the valve core 400 can slide along the flow direction of the fluid so that in the process of closing or opening the fluid channel in the valve body 300, the inner wall surfaces of the valve core 400 and the valve body 300 abut against each other under the action of the flow of the fluid and scrape off the impurities adhered to the valve core 400 and the valve body 300.

[0042] The self-cleaning sewage valve has a closed state and an open state. When the self-cleaning sewage valve switches between the open state and the closed state, the valve core 400 realizes the exchange of the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400 under the action of external force. Under the flow of the fluid, the valve core 400 and the inner wall surface of the valve body 300 abut to scrape off the impurities adhered to the valve core 400 and the valve body 300, so that on the one hand, the impurities adhered to the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400 can be washed away under the flow of the fluid, and on the other hand, the valve core 400 is 00 can always be in close contact with the valve body 300. When the valve core 400 slides in a direction perpendicular to the flow direction of the fluid, the valve core 400 abuts against the inner wall surface of the valve body 300 under the action of the flow of the fluid, thereby scraping off impurities on the surface of the valve core 400 and impurities at the abutment between the valve core 400 and the valve body 300, avoiding these impurities from affecting the sealing performance of the self-cleaning sewage valve, and at the same time reducing the fluid entering the valve body 300 from the connection between the valve core 400 and the valve body 300, avoiding the fluid from bringing impurities at the outlet sealing surface of the valve core 400 back into the valve body 300 or the inlet sealing surface of the valve core 400.

[0043] Specifically, to ensure the sealing of the self-cleaning drain valve, Figure 3 and Figure 6As shown, the self-cleaning sewage valve is configured to also include a mounting frame 600 and a clamping block 601. The mounting frame 600 is inserted into the valve body 300. The mounting frame 600 is connected to the valve body 300 through the clamping block 601. A first retaining ring 602 and a first rubber ring 603 are sleeved on the outer circumferential wall of the mounting frame 600. The first retaining ring 602 and the first rubber ring 603 are used to ensure the sealing between the mounting frame 600 and the valve body 300.

[0044] It can be understood that in order to improve the connection stability between the mounting frame 600 and the valve body 300, the number of the blocks 601 can be set to multiple, and the multiple blocks 601 are evenly distributed around the mounting frame 600 along the circumferential direction; for example, the number of the blocks 601 can be set to four, and the four blocks 601 are all inserted into the valve body 300 at one end and inserted into the mounting frame 600 at the other end.

[0045] Specifically, Figure 3 and Figure 6 As shown, in order to improve the sealing performance of the self-cleaning sewage valve, the self-cleaning sewage valve is configured to further include a valve cover 500, and the valve cover 500 is arranged above the mounting frame 600 and fixedly connected to the mounting frame 600 by bolts.

[0046] It can be understood that in order to improve the connection stability between the valve cover 500 and the mounting frame 600, the number of valve covers 500 can be set to multiple, and the multiple valve covers 500 are evenly distributed around the mounting frame 600 along the circumferential direction; for example, the number of valve covers 500 can be set to two, and the two valve covers 500 are fixedly connected to the mounting frame 600 by bolts.

[0047] In some embodiments, the self-cleaning sewage valve is configured to also include a valve stem 200, which can be rotatably and slidably inserted into the interior of the valve body 300 along a direction perpendicular to the flow of the fluid. The end of the valve stem 200 close to the fluid channel is connected to the valve core 400, and the valve stem 200 is used to drive the valve core 400 to move.

[0048] Specifically, in order to provide driving force for the rotation and movement of the valve stem 200, the self-cleaning sewage valve can be configured to also include a driving motor and a driving cylinder. The driving motor is fixedly connected to the valve body 300 by bolts, and the driving cylinder is fixedly connected to the motor shaft of the driving motor. The end of the valve stem 200 away from the valve core 400 is fixedly connected to the output shaft of the driving cylinder.

[0049] During the process of switching the self-cleaning sewage valve from a closed state to an open state, the drive cylinder is started, the output shaft of the drive cylinder is retracted, and the output shaft synchronously drives the valve stem 200 to move along its own extension direction in the direction away from the fluid channel in the valve body 300, and the valve stem 200 synchronously drives the valve core 400 to move until the valve core 400 is completely separated from the fluid channel in the valve body 300; the drive motor is started, the drive motor drives the drive cylinder to rotate, the drive cylinder drives the valve stem 200 to rotate, and the valve stem 200 drives the valve core 400 to rotate so that the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400 are exchanged; during the process of switching the self-cleaning sewage valve from an open state to a closed state, the drive cylinder is started, the output shaft of the drive cylinder is extended, and the output shaft synchronously drives the valve stem 200 to move along its own extension direction in the direction close to the fluid channel in the valve body 300, and the valve stem 200 synchronously drives the valve core 400 to move until the valve core 400 descends to a position to close the fluid channel.

[0050] It can be understood that the driving cylinder can be configured as any one of a hydraulic cylinder, a pneumatic cylinder or an electric cylinder.

[0051] Specifically, in order to improve the sealing performance between the valve stem 200 and the mounting frame 600, as Figure 3 and Figure 6 As shown, a second retaining ring 604 and a second rubber ring 605 are sleeved on the valve stem 200 , and the second retaining ring 604 and the second rubber ring 605 are both located between the valve stem 200 and the mounting frame 600 .

[0052] It can be understood that in order to further improve the sealing between the valve stem 200 and the mounting frame 600, the number of the second retaining ring 604 and the second rubber ring 605 can be set to multiple; for example, the second retaining ring 604 and the second rubber ring 605 can be set to three, and the second retaining ring 604 and the second rubber ring 605 are spaced and alternately arranged along the extension direction of the valve stem 200.

[0053] Specifically, in order to improve the sealing performance of the second retaining ring 604 and the second rubber ring 605, a pressure block 607 is rotatably mounted on the valve stem 200, and the pressure block 607 is fixedly connected to the mounting frame 600 by bolts. A pressure ring 606 is rotatably mounted on the valve stem 200, and the pressure ring 606 is located below the pressure block 607 and above the second retaining ring 604 and the second rubber ring 605; under the action of the pressure block 607, the pressure ring 606 always abuts against the second retaining ring 604 or the second rubber ring 605, so that the second retaining ring 604 and the second rubber ring 605 are deformed to fill the gap between the valve stem 200 and the mounting frame 600, thereby improving the sealing performance between the valve stem 200 and the mounting frame 600 by improving the sealing performance of the second retaining ring 604 and the second rubber ring 605.

[0054] In a further embodiment, Figure 4 , Fig. 9and Fig.10 As shown, in order to provide a driving force for the rotation and movement of the valve stem 200, a spiral portion is provided at one end of the valve stem 200 away from the valve core 400; the self-cleaning sewage valve can also be configured to include a hand wheel 100, which can be rotatably arranged on the valve body 300, and the cooperation between the hand wheel 100 and the spiral section is a spiral cooperation; the guide structure 310 is configured to include a first vertical portion, an ascending portion, a descending portion and a second vertical portion connected in sequence, the first vertical portion is used to limit the rotation of the valve core 400 during the process of the valve core 400 opening the fluid channel in the valve body 300; the ascending portion is used to guide the rotation of the valve core 400 when the valve core 400 is separated from the first vertical portion; the descending portion is used to guide the rotation of the valve core 400 when the valve core 400 is separated from the ascending portion; the second vertical portion is used to close the valve body 300 when the valve core 400 closes the valve body 300 0, so as to limit the rotation of the valve core 400 during the process of passing through the fluid channel in the valve body 300; in the present embodiment, the first vertical portion is configured to include a first vertical section 311, and the first vertical section 311 is configured to include two guide rails arranged in the vertical direction on the inner wall surface of the valve body 300; the ascending portion is configured to include an ascending section 312, and the ascending section 312 is configured to include a spiral guide rail spiraling upward along the circumferential direction of the valve body 300; the descending portion is configured to include a descending section 313, and the descending section 313 is configured to include a spiral guide rail spiraling downward along the circumferential direction of the valve body 300; the second vertical portion is configured to include a second vertical section 314, and the second vertical section 314 and the first vertical section 311 are arranged opposite to each other, and the second vertical section 314 is configured to include two guide rails arranged in the vertical direction on the inner wall surface of the valve body 300.

[0055] Specifically, Figure 7 As shown, a guide block 401 is provided on the valve core 400 , and the guide block 401 can slide along the extension direction of the two first vertical sections 311 or the two second vertical sections 314 .

[0056] During the switching of the self-cleaning sewage valve from the closed state to the open state, the guide block 401 is clamped on the first vertical section 311, and the hand wheel 100 is rotated forward. Under the restriction of the first vertical section 311, the hand wheel 100 drives the valve stem 200 to move along its own axis in the direction away from the fluid channel in the valve body 300 through spiral cooperation. The valve stem 200 simultaneously drives the valve core 400 to move until the valve core 400 is completely separated from the fluid channel in the valve body 300, and the guide block 401 moves from the first vertical section 311 to the rising section 312; continue to rotate the hand wheel 100 forward. Under the guidance of the spiral cooperation and the rising section 312, the hand wheel 100 drives the valve stem 200 to move along its own axis in the direction away from the fluid channel in the valve body 300 while rotating forward. When the guide block 401 moves from the rising section 312 When it moves to the descending section 313, the handwheel 100 is rotated in the opposite direction. Under the guidance of the spiral fit and the descending section 313, the handwheel 100 drives the valve stem 200 to rotate while moving along its own axis toward the direction of the fluid channel in the valve body 300, thereby realizing the exchange of the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400; in the process of switching the self-cleaning sewage valve from an open state to a closed state, the guide block 401 moves from the descending section 313 to the second vertical section 314, and the guide block 401 is clamped on the second vertical section 314. The handwheel 100 continues to be rotated in the opposite direction. Under the restriction of the second vertical section 314, the handwheel 100 drives the valve stem 200 to move along its own axis toward the direction of the fluid channel in the valve body 300 through spiral fit until the valve core 400 descends to a position that closes the fluid channel.

[0057] Specifically, Figure 2 As shown, in order to facilitate the connection between the handwheel 100 and the valve body 300, the self-cleaning sewage valve is configured to also include a wheel frame 101 and a connecting seat 102, the handwheel 100 is fixedly connected to the wheel frame 101, the wheel frame 101 is fixedly connected to the connecting seat 102 by bolts, and the connecting seat 102 is fixedly connected to the valve body 300 by bolts.

[0058] In other embodiments, the guide structure 310 may also be configured to include a first vertical portion and a second vertical portion. In this embodiment, the first vertical portion is configured to include a first vertical section 311, and the first vertical section 311 is configured to include two guide rails arranged along the vertical direction on the inner wall surface of the valve body 300; the second vertical portion is configured to include a second vertical section 314, and the second vertical section 314 and the first vertical section 311 are arranged opposite to each other, and the second vertical section 314 is configured to include two guide rails arranged along the vertical direction on the inner wall surface of the valve body 300.

[0059] During the process of switching the self-cleaning sewage valve from a closed state to an open state, the guide block 401 is clamped on the first vertical section 311, and the hand wheel 100 is rotated forward. Under the restriction of the first vertical section 311, the hand wheel 100 drives the valve stem 200 to move along its own axis in a direction away from the fluid channel in the valve body 300 through spiral cooperation, and the valve stem 200 simultaneously drives the valve core 400 to move until the valve core 400 is completely separated from the fluid channel in the valve body 300; when the hand wheel 100 rotates to the end position of the spiral section, the hand wheel 100 continues to be rotated forward, and the hand wheel 100 drives the valve stem 200 to move synchronously. The hand wheel 100 is rotated in a step-by-step manner and drives the valve core 400 through the valve stem 200 to exchange the inlet sealing surface of the valve core 400 with the outlet sealing surface of the valve core 400; during the switching of the self-cleaning sewage valve from the open state to the closed state, the guide block 401 is clamped on the second vertical section 314, and the hand wheel 100 is rotated in the opposite direction. Under the restriction of the second vertical section 314, the hand wheel 100 drives the valve stem 200 to move along its own axis toward the direction of the fluid channel in the valve body 300 through spiral cooperation, and the valve stem 200 synchronously drives the valve core 400 to move until the valve core 400 descends to the position of closing the fluid channel.

[0060] In some embodiments, the self-cleaning sewage valve is configured to also include a first elastic member, one end of the first elastic member is arranged on the valve stem 200, and the other end is arranged on the valve core 400. By providing the first elastic member, the valve core 400 and the valve stem 200 can slide relative to each other, thereby avoiding slippage between the handwheel 100 and the valve stem 200 due to excessive force when closing the valve when the handwheel 100 is turned and the handwheel 100 drives the valve stem 200 to move along its own extension direction toward the direction of the fluid channel in the valve body 300 until the valve core 400 descends to the position of closing the fluid channel.

[0061] Specifically, the self-cleaning sewage valve is configured to also include a protrusion 202, which can be slidably inserted on the valve stem 200 along the extension direction of the valve stem 200, and the end of the protrusion 202 away from the valve stem 200 can be slidably inserted on the valve core 400 along the flow direction of the fluid. By setting the protrusion 202, the valve core 400 can slide relative to the valve stem 200 along the extension direction of the valve stem 200 and along the flow direction of the fluid; the first elastic member is configured as a first compression spring 201, one end of the first compression spring 201 is fixedly connected to the valve stem 200, and the other end is fixedly connected to the protrusion 202.

[0062] In some embodiments, Figure 7As shown, a scraper 410 is provided on the valve core 400, and the scraper 410 can slide along the flow direction of the fluid, and the scraper 410 is used to scrape off impurities adhered to the valve core 400; when the self-cleaning sewage valve switches between an open state and a closed state, the scraper 410 can move from one end of the valve core 400 to the other end under the action of the flow of the fluid, thereby scraping off the impurities previously accumulated inside the valve core 400, thereby preventing these impurities from affecting the sealing of the self-cleaning sewage valve.

[0063] Specifically, Figure 8 As shown, a slide groove 402 is provided on the valve core 400 , and the scraper 410 can slide along the slide groove 402 , thereby enabling the scraper 410 to slide along the flow direction of the fluid.

[0064] In a further embodiment, Figure 8 As shown, a locking assembly 420 is disposed on the valve core 400 , and the locking assembly 420 is used to lock or unlock the position of the scraper 410 on the valve core 400 .

[0065] In a further embodiment, Figure 5 As shown, the locking assembly 420 is configured to include an upper top block 421, a lower top block 422, a second elastic member and a connecting rod 423. The upper top block 421 and the lower top block 422 can be slidably arranged on the valve core 400 along a direction perpendicular to the flow direction of the fluid. The upper top block 421 and the lower top block 422 are connected by the second elastic member and the connecting rod 423. The number of the connecting rods 423 is two and they are cross-arranged. When the valve core 400 closes the fluid channel, the lower top block 422 abuts against the valve body 300 and drives the upper top block 421 to move toward the lower top block 422 through the connecting rod 423. Under the action of the flow of the fluid, the scraper 410 passes over the upper top block 421 and moves from one end of the valve core 400 to the other end, thereby scraping off the impurities accumulated inside the valve core 400. When the valve core 400 moves along the valve When the extension direction of the rod 200 moves in the direction away from the fluid channel in the valve body 300, under the action of the second elastic member, the lower top block 422 drives the upper top block 421 to move in the direction away from the lower top block 422 through the connecting rod 423, so that the upper top block 421 clamps the scraper 410; by setting the locking assembly 420, before the valve core 400 descends to the position of closing the fluid channel, the locking assembly 420 locks the position of the scraper 410, so that the fluid can flush the inlet sealing surface, thereby improving the flushing effect; when the valve core 400 descends to the position of closing the fluid channel, the locking assembly 420 unlocks the position of the scraper 410, so that the scraper 410 can uniformly scrape away the impurities flushed from the inlet sealing surface, thereby preventing these impurities from affecting the sealing of the self-cleaning sewage valve.

[0066] Specifically, the second elastic member is configured as a second compression spring 424 , one end of the second compression spring 424 is fixedly connected to the upper top block 421 , and the other end of the second compression spring 424 is fixedly connected to the lower top block 422 .

[0067] In some embodiments, both the inlet sealing surface of the valve core 400 and the outlet sealing surface of the valve core 400 are wedge-shaped surfaces inclined relative to the fluid channel, thereby improving the sealing performance when the valve core 400 descends to a position to close the fluid channel.

[0068] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above 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.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A self-cleaning drain valve, characterized in that: The self-cleaning drain valve comprises: A valve body, wherein a passage for fluid flow is provided in the valve body; A valve core, which can be slidably disposed inside the valve body in a direction perpendicular to the flow direction of the fluid to close or open the fluid passage in the valve body; The valve core can rotate inside the valve body to achieve the exchange of the inlet sealing surface of the valve core and the outlet sealing surface of the valve core; The valve core can slide along the flow direction of the fluid so that in the process of closing or opening the fluid passage in the valve body, the valve core and the inner wall surface of the valve body abut against each other under the action of the flow of the fluid and scrape off impurities adhering to the valve core and the valve body; The self-cleaning sewage valve further comprises a valve stem, which is inserted into the interior of the valve body, and one end of the valve stem close to the fluid channel is connected to the valve core, and the valve stem is used to drive the valve core to move; The valve stem is provided with a spiral portion at one end away from the valve core; the self-cleaning sewage valve also includes a handwheel, which is rotatably provided on the valve body, and the cooperation mode of the handwheel and the spiral portion is spiral cooperation; a guide structure is provided in the valve body, and the guide structure includes a first vertical portion, an ascending portion, a descending portion and a second vertical portion connected in sequence, the first vertical portion is used to limit the rotation of the valve core in the process of the valve core opening the fluid channel in the valve body; the ascending portion is used to guide the rotation of the valve core when the valve core is separated from the first vertical portion; the descending portion is used to guide the rotation of the valve core when the valve core is separated from the ascending portion; the second vertical portion is used to limit the rotation of the valve core in the process of the valve core closing the fluid channel in the valve body; The valve core is provided with a scraper, which can slide along the flow direction of the fluid and is used to scrape off impurities adhered to the valve core; The valve core is provided with a locking assembly, and the locking assembly is used to lock or unlock the position of the scraper on the valve core; The locking assembly includes an upper top block, a lower top block, a second elastic member and a connecting rod. The upper top block and the lower top block can be slidably arranged on the valve core in a direction perpendicular to the flow direction of the fluid. The upper top block and the lower top block are connected by the second elastic member and the connecting rod. There are two connecting rods and they are cross-arranged. When the valve core closes the fluid channel, the lower top block abuts against the valve body and drives the upper top block to move toward the lower top block through the connecting rod. Under the action of the flow of the fluid, the scraper passes over the upper top block and moves from one end of the valve core to the other end.

2. The self-cleaning drain valve according to claim 1, characterized in that: The self-cleaning sewage valve further comprises a first elastic member, one end of which is arranged on the valve stem, and the other end of which is arranged on the valve core.

3. The self-cleaning drain valve according to claim 1, characterized in that: The inlet sealing surface of the valve core and the outlet sealing surface of the valve core are both wedge-shaped surfaces that are arranged obliquely relative to the fluid channel.

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