Anti-clogging sewer pipe valve

Abstract

The application discloses a kind of sewage pipeline valves of preventing blockage, it is related to pipeline valve field, including: valve body and two respectively installed at the butt joint pipe of valve body both ends, the top and bottom of valve body are equipped with shell, the inside of shell is provided with valve body, and the top and bottom of valve body are respectively provided with the sliding slot for the limiting sliding of two valve bodies;It also includes: sealing mechanism, for providing anti-blocking sealing to valve body, sealing mechanism is installed in the inside of shell, sealing mechanism includes two first hetero-directional screw rods rotationally installed between two shells;The application can be adjusted to two vertically distributed valve bodies simultaneously by sealing mechanism, so that two valve bodies contact each other, realize the sealing of valve cavity in valve body, avoid the situation that the bottom flow passage of valve is blocked and cannot be closed, so as to achieve the effect of sealing and preventing blockage.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipeline valves, in particular to a sewage pipeline valve capable of preventing blockage. BACKGROUND

[0002] Sewage pipelines are underground pipeline systems specially used for collecting and transporting domestic sewage and industrial wastewater, and are responsible for orderly removing the dirty water generated in our daily life to a sewage treatment plant, and then discharging it back to the natural environment after purification.

[0003] In the sewage pipeline system, valves are key equipment for controlling, isolating or regulating the flow of sewage. Among them, the stop valve relies on the pressure of the valve rod to make the sealing surface of the valve body tightly fit with the sealing surface of the valve seat to prevent the medium from flowing. Since the sewage contains various impurities such as sand, fibers, solid particles, etc., when flowing through the stop valve, it is easy to accumulate near the valve cavity and valve seat, affecting the normal opening and closing of the valve, and reducing the flow efficiency of the sewage. The existing pipeline valve is provided with a reciprocating cutter at the bottom of the valve body, which can cut the impurities and fibers. However, when the valve body is opened, the impurities and fibers will also adhere to and entangle the cutter, making it difficult to ensure the normal use of the cutter, and also causing the accumulation of impurities and fibers, making the internal blockage of the valve more serious, and the sealing surface of the valve body cannot contact the sealing surface of the valve seat, affecting the normal closing of the valve. SUMMARY

[0004] The present application aims to provide a sewage pipeline valve capable of preventing blockage to solve the problems raised in the background.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The utility model provides an anti -blocking sewage pipe valve, include: valve body and two respectively fixed installation in the butt joint of valve body both ends, the top and bottom of valve body are fixedly installed with the casing, the inside of casing is provided with valve body, and the top and bottom of valve body are provided with the slide groove of two valve body limit sliding respectively, still include: sealing mechanism for providing anti -blocking seal to valve body, sealing mechanism installs in the inside of casing, sealing mechanism includes two first hetero -directional screw rod rotationally installed between two casing, first hetero -directional screw rod can adjust two valve body synchronously, protection mechanism for providing sealed protection to valve body, protection mechanism installs in the inside of valve body, protection mechanism includes two arc -shaped board symmetry setting in the inside of slide groove, two arc -shaped board can provide sealing for slide groove, clear material mechanism for scraping the impurity on arc -shaped board, clear material mechanism installs in the inside of valve body, clear material mechanism includes two scraper ring symmetry setting in the inside of valve body, scraper ring can clean the impurity on arc -shaped board.

[0007] Preferably, the sealing mechanism further comprises a sliding plate fixedly installed at one end of the valve body away from the valve body, both ends of the sliding plate are fixedly installed with first moving blocks, the first moving blocks are threadedly assembled at one end of the adjacent first hetero-directional screw rods, and the inner side of the casing is fixedly installed with a light axis for limiting sliding of the first moving blocks, the top of the casing located at the top of the valve body is rotationally installed with an adjusting hand wheel, the bottom end of the adjusting hand wheel extends to the inner side of the casing, the top ends of the two first hetero-directional screw rods and the bottom end of the adjusting hand wheel are fixedly installed with transmission wheels, and a synchronous belt is rotationally installed between the three transmission wheels, and the synchronous belt and the transmission wheels are respectively chain belts and sprocket structures.

[0008] Preferably, the protection mechanism further comprises two positioning frames symmetrically located at the outer sides of the first hetero-directional screw rods, the inner side of the valve body is provided with a mounting cavity for limiting sliding of the arc-shaped plates, and the positioning frames are fixedly installed at the inner side of the mounting cavity, the inner side of the positioning frame is rotationally installed with a second hetero-directional screw rod, the top of the arc-shaped plate is fixedly installed with two second moving blocks symmetrically distributed, the second moving blocks are threadedly assembled at one end of the adjacent second hetero-directional screw rods, and the second moving blocks are slidingly installed at the inner side of the positioning frame, the outer side of the second hetero-directional screw rod is fixedly installed with a first gear, the inner side of the positioning frame is rotationally installed with a driven rod, and the outer side of the driven rod is fixedly installed with a second gear engaged with the first gear, the outer side of the positioning frame is provided with a rack engaged with the second gear, and a support rod is fixedly installed between the rack and the adjacent first moving block, and the inner part of the valve body is provided with a cavity for movement of the rack and the support rod.

[0009] Preferably, the cleaning mechanism further includes a toothed ring fixedly installed at one end of the scraper ring, and the two toothed rings are respectively located at opposite ends of the two scraper rings. The valve body has an annular cavity for limiting the sliding of the scraper ring, and the outer side of the scraper ring is in contact with the outer side of the arc plate. A third gear that cooperates with the toothed ring is rotatably installed on the inner side of the annular cavity, and a transmission rod is fixedly installed on the axis of the third gear. The transmission rod is rotatably installed on the inner side of the annular cavity. A first conical wheel is fixedly installed at the end of the transmission rod away from the third gear, and a second conical wheel that meshes with the first conical wheel is fixedly installed on the outer side of the first counter-rotating screw located outside the transmission rod.

[0010] Preferably, a threaded cylinder is fixedly installed at the end of the connecting pipe away from the valve body.

[0011] Preferably, a retaining strip is provided at the top of the valve disc body located at the bottom of the valve body, and a retaining groove is provided at the bottom of the valve disc body located at the top of the valve body for the retaining strip to be inserted into.

[0012] Preferably, rubber strips are fixedly installed on one side of each of the two arc-shaped plates, and the two rubber strips are in contact with each other.

[0013] Preferably, the support rod and the rack have slots on their outer sides, and a guide bar is slidably installed on the inner side of the slot, and the guide bar is fixedly installed in the cavity of the valve body.

[0014] Preferably, a positioning ring is fixedly installed at the end of the toothed ring away from the scraper ring, and an annular groove for installing the positioning ring is provided in the annular cavity of the valve body.

[0015] Preferably, the inner side of the scraper ring is provided with four symmetrically distributed triangular scraper teeth, and the triangular scraper teeth are fixedly installed on the inner side of the valve body.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] 1. The present invention, through a sealing mechanism, can simultaneously adjust two vertically distributed valve disc bodies, so that the two valve disc bodies come into contact with each other, thereby sealing the valve cavity inside the valve body and avoiding the blockage of the bottom flow channel of the valve, which would prevent it from being unable to close, thus achieving the effect of sealing and preventing blockage.

[0018] 2. The present invention, through a protective mechanism, enables the two arc-shaped plates to move away from each other during the movement of the two valve disc bodies, facilitating contact between the two valve disc bodies. When the valve disc bodies are retracted into the housing, the two arc-shaped plates seal the sliding groove of the valve body, preventing impurities in the water flow from accumulating on the valve disc bodies and ensuring the normal sealing of the valve body by the two valve disc bodies, thereby achieving the effect of sealing and protection.

[0019] 3. The present invention, through the cleaning mechanism, enables the arc-shaped plate to move along the outer side of the scraper ring and makes the scraper ring rotate, which facilitates the removal of impurities on the arc-shaped plate and ensures the normal movement of the arc-shaped plate, thereby achieving the effect of automatically cleaning impurities. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a schematic diagram of a partial cross-sectional structure of the valve body and housing in this invention;

[0022] Figure 3 for Figure 2 Enlarged structural diagram of area A in the middle;

[0023] Figure 4 This is a schematic diagram of the valve disc body and adjusting handwheel structure in this invention;

[0024] Figure 5 This is a schematic diagram of a partial cross-sectional structure of the transmission rod and gear ring in this invention;

[0025] Figure 6 This is a schematic diagram of the positioning frame and driven rod structure in this invention;

[0026] Figure 7 This is a partial cross-sectional view of the second conical wheel and the triangular scraper teeth in this invention.

[0027] Figure 8 This is a schematic diagram of the scraper ring and arc-shaped plate structure in this invention.

[0028] In the diagram: 1. Valve body; 2. Connecting pipe; 3. Housing; 4. Valve disc body; 5. First counter-rotating screw; 6. Arc plate; 7. Scraper ring; 8. Slide plate; 9. First moving block; 10. Adjusting handwheel; 11. Transmission wheel; 12. Synchronous belt; 13. Positioning frame; 14. Second counter-rotating screw; 15. Second moving block; 16. First gear; 17. Driven rod; 18. Second gear; 19. Rack; 20. Support rod; 21. Gear ring; 22. Third gear; 23. Transmission rod; 24. First conical wheel; 25. Rubber strip; 26. Guide strip; 27. Positioning ring; 28. Triangular scraper tooth; 29. ​​Clamping strip; 30. Second conical wheel; 31. Threaded cylinder. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figures 1-8 The diagram shows a type of anti-clogging sewage pipe valve, comprising a valve body 1 and two connecting pipes 2 respectively fixedly installed at both ends of the valve body 1. The valve body 1 is installed between two pipes through the two connecting pipes 2. A housing 3 is fixedly installed on the top and bottom of the valve body 1. A valve disc body 4 is provided on the inner side of the housing 3. The top and bottom of the valve body 1 are respectively provided with sliding grooves for limiting the sliding of the two valve disc bodies 4, so that when the two valve disc bodies 4 come into contact with each other, they can seal the valve cavity of the valve body 1.

[0031] The sealing mechanism includes two first counter-rotating screws 5 rotatably mounted between two housings 3. The first counter-rotating screws 5 can synchronously adjust the two valve disc bodies 4. The sealing mechanism also includes a sliding plate 8 fixedly mounted on the end of the valve disc body 4 away from the valve body 1. The two ends of the sliding plate 8 are fixedly mounted with first moving blocks 9. The first moving blocks 9 are threadedly fitted to one end of the adjacent first counter-rotating screws 5. The inner side of the housing 3 is fixedly mounted with an optical shaft for limiting the sliding of the first moving blocks 9. When the two first counter-rotating screws 5 rotate, the four first moving blocks 9 can drive the two sliding plates 8 to move closer to each other. The two sliding plates 8 respectively drive the two valve disc bodies 4 to move along the sliding groove of the valve body 1. The two valve disc bodies 4 can then contact each other to seal the valve body 1 and prevent dirt blockage from causing a seal failure. An adjusting handwheel 10 is rotatably mounted on the top of the housing 3 located at the top of the valve body 1. The bottom end of the adjusting handwheel 10 extends to the inner side of the corresponding housing 3. The top of the first counter-rotating screw 5 and the bottom of the adjusting handwheel 10 are both fixedly equipped with transmission wheels 11, and a synchronous belt 12 is rotatably installed between the three transmission wheels 11. The synchronous belt 12 and the transmission wheels 11 are respectively a chain belt and a sprocket structure. When the adjusting handwheel 10 is rotated, the synchronous belt 12 driven by the transmission wheel 11 at its bottom can rotate and move. The synchronous belt 12 can drive the two first counter-rotating screws 5 to rotate synchronously through the other two transmission wheels 11, which improves the convenience of adjusting the two valve disc bodies 4. The end of the connecting pipe 2 away from the valve body 1 is fixedly equipped with a threaded cylinder 31, so that the connecting pipe 2 can be connected to the sewage pipe through the threaded cylinder 31. The top of the valve disc body 4 located at the bottom of the valve body 1 is provided with a retaining strip 29, and the bottom of the valve disc body 4 located at the top of the valve body 1 is provided with a retaining groove for the retaining strip 29 to be inserted. When the two valve disc bodies 4 are in contact, the retaining strip 29 can be inserted into the retaining groove, which improves the sealing performance of the two valve disc bodies 4 to the valve body 1.

[0032] Example 2: Please refer to Figures 2-6This embodiment further illustrates Example 1. The protective mechanism shown in the figure includes two arc-shaped plates 6 symmetrically arranged inside the slide groove. The two arc-shaped plates 6 can provide a seal for the slide groove. The protective mechanism also includes two positioning frames 13 symmetrically located outside the first counter-rotating screw 5. The valve body 1 has an installation cavity on its inner side for limiting the sliding of the arc-shaped plates 6, and the positioning frames 13 are fixedly installed inside the installation cavity. The second counter-rotating screw 14 is rotatably installed inside the positioning frame 13. Two second moving blocks 15 symmetrically distributed are fixedly installed on the top of the arc-shaped plates 6. The second moving blocks 15 are threadedly assembled to adjacent second counter-rotating screws 5. One end of the screw 14 and the second moving block 15 are slidably mounted on the inner side of the positioning frame 13, so that when the second counter-rotating screw 14 rotates, it can drive the corresponding two second moving blocks 15 to move closer or further away from each other. The second moving blocks 15 drive the arc plate 6 to move synchronously, so that the two adjacent arc plates 6 move closer or further away from each other, realizing the opening and sealing of the two sliding grooves on the valve body 1, providing protection for the two valve disc bodies 4, preventing impurities in the water flow from accumulating on the valve disc bodies 4, and ensuring the normal sealing of the two valve disc bodies 4 to the valve body 1. The outer side of the second counter-rotating screw 14 is fixedly mounted with a first gear 16, and the positioning frame 13 A driven rod 17 is rotatably mounted on the inner side of the valve body 13, and a second gear 18 that meshes with the first gear 16 is fixedly mounted on the outer side of the driven rod 17. A rack 19 that meshes with the second gear 18 is provided on the outer side of the positioning frame 13, and a support rod 20 is fixedly mounted between the rack 19 and the adjacent first moving block 9. A cavity is provided inside the valve body 1 for the rack 19 and the support rod 20 to move, so that when the first moving block 9 moves, the rack 19 can move through the support rod 20, causing the rack 19 to drive the second gear 18 to rotate. The second gear 18 can then drive the second counter-rotating screw 14 to rotate through the first gear 16, realizing two arc-shaped... The separation of plates 6 facilitates the retraction of the valve disc body 4 into the mounting cavity. Rubber strips 25 are fixedly installed on the corresponding sides of the two arc-shaped plates 6, and the two rubber strips 25 are in contact with each other. When the two arc-shaped plates 6 are close together, the two rubber strips 25 can contact each other, improving the sealing performance of the sliding groove on the valve body 1. The support rod 20 and the rack 19 have slots on their outer sides, and guide strips 26 are slidably installed on the inner side of the slots. The guide strips 26 are fixedly installed in the cavity of the valve body 1, so that the support rod 20 and the rack 19 can move along the outer side of the guide strips 26 during movement, improving the smoothness of the movement of the support rod 20 and the rack 19.

[0033] Example 3: Please refer to Figures 2-8This embodiment further illustrates other embodiments. The cleaning mechanism shown in the figure includes two scraper rings 7 symmetrically arranged inside the valve body 1. The scraper rings 7 can clean impurities on the arc plate 6. The cleaning mechanism also includes a toothed ring 21 fixedly installed at one end of the scraper rings 7, and the two toothed rings 21 are respectively located at opposite ends of the two scraper rings 7. An annular cavity is opened inside the valve body 1 for the scraper rings 7 to slide in a limited manner, and the outer side of the scraper rings 7 contacts the outer side of the arc plate 6, so that when the arc plate 6 moves, it can move along the outer side of the scraper rings 7, which facilitates the removal of impurities adhering to the arc plate 6. A third gear 22 that cooperates with the toothed ring 21 is rotatably installed inside the annular cavity, and a transmission rod 23 is fixedly installed on the axis of the third gear 22. The transmission rod 23 is rotatably installed inside the annular cavity. A first conical wheel 24 is fixedly installed at the end of the transmission rod 23 away from the third gear 22. A first conical wheel 24 that meshes with the first conical wheel 24 is fixedly installed on the outer side of the first counter-rotating screw 5 located outside the transmission rod 23. The second conical wheel 30, when the first counter-rotating screw 5 rotates, can drive the second conical wheel 30 to rotate via the first conical wheel 24. The second conical wheel 30 drives the transmission rod 23 to rotate, and the transmission rod 23 can drive the gear ring 21 to rotate via the third gear 22, causing the gear ring 21 to drive the scraper ring 7 to rotate, thereby improving the cleaning efficiency of impurities on the arc plate 6. A positioning ring 27 is fixedly installed at the end of the gear ring 21 away from the scraper ring 7, and a ring for installing the positioning ring 27 is provided in the annular cavity of the valve body 1. The annular groove allows the positioning ring 27 to move along the inner side of the groove when the toothed ring 21 rotates, providing support for the toothed ring 21 and improving the smoothness of the rotation of the toothed ring 21 and the scraper ring 7. The inner side of the scraper ring 7 is provided with four symmetrically distributed triangular scraper teeth 28, which are fixedly installed on the inner side of the valve body 1. When the scraper ring 7 rotates, it can move along the outer side of the triangular scraper teeth 28, which facilitates the scraping of residual impurities on the scraper ring 7, loosening the impurities and making them easier to be discharged with the water flow.

[0034] Working principle: First, the operator connects the two connecting pipes 2 to the two sewage pipes respectively, allowing sewage to enter the valve cavity of the valve body 1. The four arc-shaped plates 6 can respectively provide a seal to the two sliding grooves located in the valve body 1, preventing impurities in the sewage from contacting the two valve disc bodies 4. When it is necessary to seal the valve body 1, the operator rotates the adjusting handwheel 10, causing the adjusting handwheel 10 to drive the corresponding transmission wheel 11 to rotate. The transmission wheel 11 drives the other two transmission wheels 11 to rotate through the synchronous belt 12. The two transmission wheels 11 respectively drive the two first opposite-direction screws 5 to rotate. The two first opposite-direction screws 5 drive the two sliding plates 8 to move closer to each other through the four first moving blocks 9. The two sliding plates 8 respectively drive the two valve disc bodies 4 to move synchronously along the sliding cavity of the valve body 1. At the same time, the sliding plates 8 move through the support rod 20 and the rack 19, causing the rack 19 and the support rod 20 to move along the outside of the guide bar 26. The rack 19 drives the second gear 18 to rotate, causing the second gear 18 to drive the valve body 1 to rotate. The first gear 16 rotates, driving the second counter-rotating screw 14 to rotate. The second counter-rotating screw 14 drives the two corresponding second moving blocks 15 to move away from each other along the outer side of the positioning frame 13, causing the second moving blocks 15 to move the arc plate 6 along the inner side of the mounting cavity of the valve body 1 and the outer side of the scraper ring 7. The two arc plates 6 can then move away from each other, opening the slide groove of the valve body 1. At the same time, the first counter-rotating screw 5, which is equipped with the second conical wheel 30, drives the second conical wheel 30 to rotate, causing the second conical wheel 30 to drive the first conical wheel 24 to rotate. The first conical wheel 24 drives the third gear 22 to rotate through the transmission rod 23, causing the third gear 22 to drive the gear ring 21 to rotate. The gear ring 21 drives the scraper ring 7 to rotate, causing the scraper ring 7 to scrape away impurities on the arc plate 6, thus cleaning the arc plate 6. Finally, the two valve disc bodies 4 come into contact with each other, achieving a seal on the valve body 1, ensuring the normal closure of the valve body 1, and avoiding blockage, thereby achieving a sealing and anti-blocking effect.

[0035] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-clogging sewer pipe valve, characterized in that, The utility model provides a valve body and two respectively install in the butt joint pipe of valve body both ends, the top and bottom of valve body are equipped with the casing, and the inboard of casing is provided with the valve body, and the top and bottom of valve body are provided with the slide slot for the limited sliding of two valve bodies respectively, Further comprising: The sealing mechanism is used for providing anti-blocking sealing for the valve body, the sealing mechanism is installed on the inner side of the casing, the sealing mechanism comprises two first opposite screws rotatably installed between the two casings, the first opposite screws can synchronously adjust the two valve bodies, one end of the valve body is provided with a sliding plate, both ends of the sliding plate are provided with first moving blocks, the first moving blocks are threadedly assembled on one end of the adjacent first opposite screws, the inner side of the casing is fixedly provided with a light shaft for the limited sliding of the first moving blocks, the top of the casing located at the top of the valve body is rotatably provided with an adjusting hand wheel, the bottom end of the adjusting hand wheel extends to the inner side of the corresponding casing, the top ends of the two first opposite screws and the bottom end of the adjusting hand wheel are fixedly provided with transmission wheels, and the three transmission wheels are rotatably provided with a synchronous belt; The protection mechanism is used for providing sealing protection for the valve body, the protection mechanism is installed in the valve body, the protection mechanism comprises two arc-shaped plates symmetrically arranged on the inner side of the slide slot, the two arc-shaped plates can provide sealing for the slide slot, the outer side of the first opposite screw is provided with two symmetrically distributed positioning frames, the inner side of the positioning frame is rotatably provided with a second opposite screw, the top of the arc-shaped plate is provided with two second moving blocks, the second moving blocks are threadedly assembled on one end of the adjacent second opposite screws, and the second moving blocks are slidably installed on the inner side of the positioning frame, the outer side of the second opposite screw is fixedly provided with a first gear, the inner side of the positioning frame is rotatably provided with a driven rod, and the outer side of the driven rod is fixedly provided with a second gear engaged with the first gear, the outer side of the positioning frame is provided with a rack engaged with the second gear, and a support rod is installed between the rack and the adjacent first moving block, and the inner side of the valve body is provided with a cavity for the movement of the rack and the support rod; The cleaning mechanism is used for scraping off the impurities on the arc-shaped plate, the cleaning mechanism is installed on the inner side of the valve body, the cleaning mechanism comprises two scraper rings symmetrically arranged on the inner side of the valve body, the scraper rings can clean the impurities on the arc-shaped plate, one end of the scraper ring is provided with a gear ring, the inner side of the valve body is provided with an annular cavity for the limited sliding of the scraper ring, and the outer side of the scraper ring is in contact with the outer side of the arc-shaped plate, the inner side of the annular cavity is rotatably provided with a third gear matched with the gear ring, and the shaft center of the third gear is fixedly provided with a transmission rod, the transmission rod is rotatably installed on the inner side of the annular cavity, and one end of the transmission rod away from the third gear is fixedly provided with a first conical wheel, the outer side of the first opposite screw located on the outer side of the transmission rod is fixedly provided with a second conical wheel. One end of the butt joint pipe is provided with a threaded cylinder.

2. A non-clogging sewer valve according to claim 1, wherein: The top end of the valve body located at the bottom of the valve body is provided with a clamping strip, and the bottom end of the valve body located at the top of the valve body is provided with a clamping groove.

3. A non-clogging sewer valve according to claim 1, wherein: One side of each of the two arc-shaped plates is provided with a rubber strip, and the two rubber strips are in contact.

4. A non-clogging sewer valve according to claim 1, wherein: ​ 5. A sewer pipe valve according to claim 1, wherein: The outer side of the supporting rod and the rack is provided with an insertion slot, and the inner side of the insertion slot is slidably provided with a guide strip, and the guide strip is installed in the cavity of the valve body.

6. A sewer pipe valve according to claim 1, wherein: One end of the tooth ring is fixedly provided with a positioning ring, and the annular cavity of the valve body is provided with an annular groove for installing the positioning ring.

7. A sewer pipe valve according to claim 1, wherein: The inner side of the scraping ring is provided with four triangular scraping teeth, and the triangular scraping teeth are installed on the inner side of the valve body.

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