CN112161077B

CN112161077B - Anti-silting easily-detachable gate valve for sewage treatment

Info

Publication number: CN112161077B
Application number: CN202011053490.3A
Authority: CN
Inventors: 王付祥; 林伟稳; 谢锦彪; 郑重; 张雪; 罗靖; 刘晓珊; 邢路
Original assignee: International Innovation Research Institute Of Huizhou Harbin Institute Of Technology
Current assignee: International Innovation Research Institute Of Huizhou Harbin Institute Of Technology
Priority date: 2020-09-29
Filing date: 2020-09-29
Publication date: 2022-08-26
Anticipated expiration: 2040-09-29
Also published as: CN112161077A

Abstract

The invention provides an anti-silting easy-to-assemble and-disassemble gate valve for sewage treatment, which comprises: disk seat, flashboard, valve gap, valve rod, location telescopic link, flexible motor and a plurality of elastic component. The valve seat is provided with a valve groove, and the flashboard is inserted in the valve groove and is in sliding connection with the valve seat. The valve cover is provided with a connecting portion, the outer side face of the connecting portion is provided with a thread ridge, the valve seat is provided with a thread groove in the inner side wall of the valve groove, and the connecting portion is inserted in the valve groove and is in threaded connection with the valve seat. The valve cover is provided with a rubber layer which is abutted against the end face of the valve seat. The valve cover is provided with an adjusting groove, and the valve rod is inserted in the adjusting groove and is in sliding connection with the valve cover. The valve rod is provided with a brake opening hole and a brake closing hole, the valve cover is provided with a fixing part at the position close to the adjusting groove, the side surface of the fixing part is provided with a fixing hole, and the positioning telescopic rod is inserted into the fixing hole and the brake closing hole. Each elastic member is accommodated in the valve spool. One end of the elastic piece is connected with the flashboard, and the other end of the elastic piece is connected with the connecting part. The gate valve is not easy to cause siltation, and the disassembly and assembly convenience is improved to a great extent.

Description

Anti-silting easily-detachable gate valve for sewage treatment

Technical Field

The invention relates to the technical field of gate valves, in particular to an anti-silting easily-assembled and disassembled gate valve for sewage treatment.

Background

The gate valve is a valve for controlling the on-off of fluid in a pipeline. The opening and closing part of the gate valve is a gate plate, the moving direction of the gate plate is vertical to the moving direction of fluid, and the gate valve can only be fully opened and fully closed and cannot be adjusted and throttled. The gate valve is sealed by the contact of the valve seat and the gate plate, and the sealing surface of the gate valve is usually welded with metal materials to increase the wear resistance.

However, after the existing gate valve is used for a long time, the bottom of the valve seat of the gate valve is easy to accumulate sludge, and the tightness of the gate valve is further affected. In addition, the existing gate valve is complex in structure and complex in assembly, so that the assembly efficiency of the gate valve is influenced, and the convenience of gate valve maintenance operation is reduced.

Disclosure of Invention

Therefore, it is necessary to provide an anti-silting and easily detachable gate valve for sewage treatment, aiming at the technical problems of easy silting and insufficient convenience in disassembly and assembly.

The utility model provides a sewage treatment is with preventing siltation easy dismouting gate valve, this sewage treatment is with preventing siltation easy dismouting gate valve includes: the valve comprises a valve seat, a flashboard, a valve cover, a valve rod, a positioning telescopic rod, a telescopic motor and a plurality of elastic pieces;

the valve seat is provided with a valve groove, and the valve groove is respectively communicated with the input end and the output end of the valve seat; the gate plate is inserted into the valve groove and is in sliding connection with the valve seat, the bottom end of the gate plate is abutted against the inner side wall of the valve seat, and the gate plate is used for blocking the input end and the output end of the valve seat;

the middle area of the valve cover is provided with a connecting part, the outer side surface of the connecting part is provided with a threaded ridge, the inner side wall of the valve seat in the valve groove is provided with a threaded groove, the threaded ridge is matched with the threaded groove, and the connecting part is inserted into the valve groove and is in threaded connection with the valve seat; the end face, facing the valve seat, of the valve cover is provided with a rubber layer, the rubber layer is arranged around the connecting part, and the rubber layer is abutted against the end face, at the valve groove, of the valve seat;

an adjusting groove is formed in the middle area of the valve cover, the adjusting groove penetrates through the valve cover, the valve rod is inserted into the adjusting groove and is connected with the valve cover in a sliding mode, the end portion of the valve rod is connected with the flashboard, and a handle is arranged at one end, far away from the flashboard, of the valve rod;

the valve rod is provided with a brake opening hole and a brake closing hole, and the brake closing hole is positioned at one side adjacent to the handle; the valve cover is provided with a fixing part adjacent to the adjusting groove, the side surface of the fixing part is provided with a fixing hole, the fixing hole is respectively matched with the switch-on hole and the switch-off hole, the positioning telescopic rod is inserted into the fixing hole and the switch-off hole, the positioning telescopic rod is respectively connected with the valve cover and the valve rod, the telescopic motor is arranged on the valve cover, the control end of the telescopic motor is connected with the positioning telescopic rod, and the telescopic motor is used for controlling the telescopic length of the positioning telescopic rod;

each elastic piece is accommodated in the valve groove; one end of the elastic piece is connected with the flashboard, and the other end of the elastic piece is connected with the connecting part; each elastic piece is in elastic deformation and has elastic force for pulling the flashboard to move close to the valve cover.

In one embodiment, the positioning telescopic rod comprises a positioning portion and a telescopic portion, the positioning portion and the telescopic portion are sequentially connected, and the positioning portion is inserted into the fixing hole and the gate closing hole.

In one embodiment, the positioning portion is connected to the valve cap and the valve stem, respectively.

In one embodiment, the positioning portion and the telescopic portion are both cylindrical structures.

In one embodiment, the positioning portion and the telescopic portion are arranged non-coaxially, and the bottom of the positioning portion and the bottom of the telescopic portion are collinear.

In one embodiment, the positioning portion has a diameter smaller than that of the telescopic portion.

In one embodiment, the diameter of the fixing hole is larger than the diameter of the telescopic part.

In one embodiment, the telescopic part is accommodated in the fixing hole, and the tail end of the telescopic part abuts against the valve rod.

In one embodiment, the output end of the telescopic motor is engaged with the telescopic part.

In one embodiment, a rack is arranged on the outer surface of the telescopic part along the axis, the output end of the telescopic motor is a gear, the telescopic motor drives the gear to rotate when working, and the gear rotates to drive the telescopic part to move along the axis.

Above-mentioned sewage treatment is with preventing silting up easy dismouting gate valve blocks the input of disk seat and the intercommunication of output through the flashboard, and the bottom through the flashboard is sealed in order to realize with the inside wall butt of disk seat, and the disk seat is interior not to have the spacing recess of setting to the flashboard to make silt can not pile up the butt department between flashboard and disk seat. When the shutter is lifted, the sludge will leave with the flow of the body of water. After the positioning telescopic rod is separated from the switch gate hole, the valve rod is pulled to lift the gate plate, so that the input end of the valve seat is communicated with the output end. The opening state of the gate valve can be kept by inserting the positioning telescopic rod into the fixing hole and the gate opening hole. Each elastic element provides assistance for the closing action of a user so that the user can resist the resistance of water flow in the valve seat. The valve cover can be screwed to release the screwed connection between the valve cover and the valve seat, so that the flashboard, the valve cover, the valve rod and the elastic pieces can be taken out from the valve seat, and the valve cover is simple and convenient to install and disassemble. This sewage treatment is with preventing siltation readily removable gate valve is difficult for causing the siltation, and has promoted the dismouting convenience in the very big degree.

Drawings

FIG. 1 is a schematic structural view of an anti-fouling easily-detachable gate valve for sewage treatment according to an embodiment;

FIG. 2 is a sectional view of an anti-fouling detachable gate valve for sewage treatment according to an embodiment;

FIG. 3 is an enlarged schematic view of portion A of the embodiment shown in FIG. 2;

FIG. 4 is a schematic partial view of an anti-fouling detachable gate valve for sewage treatment according to an embodiment;

FIG. 5 is another sectional view of the anti-fouling detachable gate valve for sewage treatment according to one embodiment.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise explicitly stated or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being permanently connected, detachably connected, or integral; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Referring to fig. 1 to 3 together, the present invention provides an anti-silting easily detachable gate valve 10 for sewage treatment, the anti-silting easily detachable gate valve 10 for sewage treatment includes: the valve comprises a valve seat 100, a gate plate 200, a valve cover 300, a valve rod 400, a positioning telescopic rod 500, a telescopic motor 510 and a plurality of elastic members 600. The valve seat 100 is provided with a valve groove 110, and the valve groove 110 is respectively communicated with the input end and the output end of the valve seat 100. The gate plate 200 is inserted into the valve groove 110 and slidably connected to the valve seat 100, a bottom end of the gate plate 200 abuts against an inner side wall of the valve seat 100, and the gate plate 200 is used for blocking an input end and an output end of the valve seat 100. That is, as shown in fig. 2, the shutter 200 serves to block the flow of liquid from the input end on the left side of the valve seat 100 to the output end on the right side of the valve seat 100. The middle region of the valve cover 300 is provided with a connecting portion 310, the outer side surface of the connecting portion 310 is provided with a threaded ridge 311, the valve seat 100 is provided with a threaded groove 111 on the inner side wall of the valve groove 110, the threaded ridge 311 is matched with the threaded groove 111, and the connecting portion 310 is inserted into the valve groove 110 and screwed with the valve seat 100. The end surface of the valve cover 300 facing the valve seat 100 is provided with a rubber layer 320, the rubber layer 320 is disposed around the connecting portion 310, and the rubber layer 320 abuts against the end surface of the valve seat 100 at the valve groove 110. The middle region of the valve cap 300 is provided with an adjusting groove 330, the adjusting groove 330 penetrates through the valve cap 300, the valve rod 400 is inserted into the adjusting groove 330 and is slidably connected with the valve cap 300, the end of the valve rod 400 is connected with the gate plate 200, and one end of the valve rod 400, which is far away from the gate plate 200, is provided with a handle 410. The stem 400 defines an opening hole 420 and a closing hole 430, and the closing hole 430 is located on a side of the stem 400 adjacent to the handle 410. The fixing portion 340 is disposed at a position of the valve cap 300 adjacent to the adjusting groove 330, a fixing hole 341 is disposed at a side surface of the fixing portion 340, the fixing hole 341 is respectively matched with the opening hole 420 and the closing hole 430, the positioning telescopic rod 500 is inserted into the fixing hole 341 and the closing hole 430, the positioning telescopic rod 500 is respectively connected with the valve cap 300 and the valve rod 400, the telescopic motor 510 is disposed on the valve cap 300, a control end of the telescopic motor 510 is connected with the positioning telescopic rod 500, and the telescopic motor 510 is used for controlling the telescopic length of the positioning telescopic rod 500. Each elastic member 600 is received in the valve spool 110. One end of the elastic member 600 is connected to the shutter 200, and the other end of the elastic member 600 is connected to the connection part 310. Each elastic member 600 is elastically deformed and has an elastic force to pull the shutter 200 to move close to the bonnet 300.

Above-mentioned sewage treatment is with easy dismouting gate valve 10 of preventing silting up blocks the input of disk seat 100 and the intercommunication of output through flashboard 200, and the bottom through flashboard 200 and the inside wall butt of disk seat 100 are in order to realize sealing, do not have the spacing recess that sets up flashboard 200 in the disk seat 100 to make silt can not pile up the butt department between flashboard 200 and disk seat 100. When the shutter 200 is lifted, the sludge will leave with the flow of the body of water. After the telescopic rod 500 is positioned away from the switch gate, the valve rod 400 is pulled to lift the gate plate 200, so that the input end and the output end of the valve seat 100 are communicated. The gate valve can be maintained in an open state by inserting the positioning rod 500 into the fixing hole 341 and the opening hole 420. Each resilient member 600 provides assistance to the user in closing the valve to facilitate the user's resistance to water flow within the valve seat 100. The screwing relationship between the valve cover 300 and the valve seat 100 can be released by screwing the valve cover 300, so that the gate plate 200, the valve cover 300, the valve rod 400 and the plurality of elastic members 600 can be taken out from the valve seat 100, and the installation and disassembly operations are simple and convenient. This sewage treatment is with preventing silting easily removable gate valve 10 is difficult for causing the silting, and has promoted the dismouting convenience in the very big degree.

As shown in fig. 3 and 4, in one embodiment, the positioning telescopic rod 500 includes a positioning portion 501 and a telescopic portion 502, the positioning portion 501 and the telescopic portion 502 are connected in sequence, and the positioning portion 501 is inserted into the fixing hole 341 and the gate closing hole 430. Further, the positioning portion 501 is connected to the bonnet 300 and the valve stem 400, respectively. Further, the positioning portion 501 and the telescopic portion 502 are both of a cylindrical structure, and the positioning portion 501 and the telescopic portion 502 are welded. Further, the positioning portion 501 and the telescopic portion 502 are disposed non-coaxially, and the bottom of the positioning portion 501 and the bottom of the telescopic portion 502 are disposed collinearly. The positioning portion 501 is connected to the bonnet 300 and the valve stem 400, respectively. Further, the diameter of the positioning portion 501 is smaller than that of the telescopic portion 502. Further, the diameter of the fixing hole 341 is larger than that of the expansion part 502. Further, the expansion portion 502 is housed in the fixing hole 341 and the tip end thereof abuts against the valve stem 400. In this way, the bellows 502 need not provide a force support for the positioning portion 501 to limit the movement of the valve stem 400, which the positioning portion 501 may provide by the bonnet 300.

In one embodiment, the output of the telescoping motor 510 engages the telescoping section 502. Further, the outward appearance of pars contractilis 502 is provided with the rack along the axis, the output of flexible motor 510 is the gear, flexible motor during operation drives gear revolve, gear revolve rotates the drive pars contractilis 502 moves along the axis. Thus, the movement of the positioning portion 501 is rapidly controlled by the expansion portion 502, and the opening or closing of the gate valve can be controlled.

The valve seat 100 is used for connecting a front-stage pipeline and a rear-stage pipeline, the input end of the valve seat 100 is communicated with the front-stage pipeline, and the output end of the valve seat 100 is communicated with the rear-stage pipeline. The valve housing 110 is provided with a shutter 200, and the flow of water is controlled by the shutter 200. The shutter 200 serves to block the input and output ends of the valve seat 100. The gate plate 200 is inserted into the valve groove 110 and slidably connected to the valve seat 100, and when the bottom end of the gate plate 200 abuts against the inner sidewall of the valve seat 100, the input end and the output end of the valve seat 100 are blocked by the gate plate 200.

In order to improve the sliding stability of the gate plate 200 and the valve seat 100, in one embodiment, a sliding block 230 is disposed on a side wall of the gate plate 200, a sliding groove 112 is formed in an inner wall of the valve seat 100 of the valve housing 110, the sliding block 230 is adapted to the sliding groove 112, and the sliding block 230 is received in the sliding groove 112 and is slidably connected to the valve seat 100. The chute 112 communicates with the valve spool 110. In this way, the movement of the shutter 200 is stabilized, thereby ensuring that the shutter 200 can be brought into effective abutting relationship with the valve seat 100. So, promoted sewage treatment with the structural stability who prevents silting up readily removable gate valve. Meanwhile, since the chute 112 is communicated with the valve slot 110, when the gate plate 200 is lifted, the sludge collected in the chute 112 will leave the chute 112 along with the flow of the water, so that the sludge will not be accumulated in the chute 112, further reducing the probability of sludge deposition.

In order to improve the sealing property of the shutter 200 abutting against the valve seat 100, in one embodiment, the bottom end of the shutter 200 is provided with a sealing layer 210, and the sealing layer 210 abuts against the inner side wall of the valve seat 100. In this embodiment, the sealing layer 210 is a waterproof rubber ring. The sealing layer 210 has a deformable property, and can fill a gap when the gate valve abuts against the valve seat 100. Further, the outer side surface of the shutter 200 abuts against the side wall of the valve spool 110. Thus, the abutting tightness of the flashboard 200 and the valve seat 100 is improved, and the sealing performance of the anti-silting and easily-detachable gate valve for sewage treatment is improved.

The valve cover 300 is used for sealing the valve seat 100, and the valve cover 300 covers the valve groove 110, so as to seal the valve seat 100 and prevent water from overflowing. In this embodiment, the threaded rib 311 is matched with the threaded groove 111, and the valve cover 300 is fastened to the valve seat 100 by a threaded connection. In order to facilitate the user to screw the valve cap 300, in one embodiment, the projection of the valve cap 300 in the vertical direction is hexagonal. That is, the side portions of the valve cover 300 have a hexagonal structure. In this manner, the edge of the valve cap 300 provides a point of force for the user to turn the valve cap 300 by an external tool, such as a wrench to turn the valve cap 300. Thus, the convenience of assembling and disassembling the valve cover 300 is improved. The rubber layer 320 plays a role in waterproof sealing, and further prevents the possibility of water overflow, so that the waterproof performance of the anti-silting easily-detachable gate valve for sewage treatment is guaranteed.

The valve rod 400 is used to drive the gate plate 200 to move, so as to open or close the anti-silting and easy-to-assemble gate valve for sewage treatment. The user pushes down by the above-mentioned to drive the shutter 200 to move, thereby causing the shutter 200 to communicate with or block the input end and the output end of the valve seat 100. In order to enhance the connection stability and the convenience of assembly and disassembly of the gate plate 200 and the valve stem 400, in one embodiment, the gate plate 200 is provided with a fastening groove 220, and an end portion of the valve stem 400 is inserted into the fastening groove 220 and is screwed with the gate plate 200. Thus, the connection stability of the shutter 200 and the valve stem 400 improves the convenience of detaching the shutter 200 and the valve stem 400. The handle 410 is arranged to provide convenience for a user to pull the valve rod 400, the handle 410 serves as a stress point, and the user pulls the valve rod 400 through the handle 410, so that the driving difficulty is reduced, and the driving convenience is improved. Further, to avoid a user being injured by the handle 410 during kicking of the handle 410, in one embodiment, the handle 410 is provided with a sheath 411. The sheath 411 is arranged to achieve a buffering protection effect. So, further promoted this sewage treatment with preventing silting up easy dismouting gate valve's security performance.

The positioning telescopic rod 500 is used for maintaining the open or close state of the anti-silting easily-detachable gate valve for sewage treatment. When the bottom end of the shutter plate 200 abuts against the inner side wall of the valve seat 100, the shutter plate 200 blocks the input end and the output end of the valve seat 100, and at this time, the shutter closing hole 430 communicates with the fixing hole 341. The user can maintain the closed state of the gate valve by inserting the positioning telescopic rod 500 into the gate closing hole 430 and the fixing hole 341 so that the positional relationship between the valve stem 400 and the valve cap 300 is fixed. When the opening hole 420 is correspondingly communicated with the fixing hole 341, the user can insert the positioning rod 500 into the opening hole 420 and the fixing hole 341 to fix the positional relationship between the valve rod 400 and the valve cap 300, so as to maintain the open state of the gate valve.

In order to enhance the connection stability between the positioning telescopic rod 500 and the valve rod 400 and the valve cap 300 when the positioning telescopic rod 500 is inserted into the gate closing hole 430 and the fixing hole 341, in one embodiment, the positioning telescopic rod 500 is screwed with the valve rod 400 and the valve cap 300. Like this, the firm relation between location telescopic link 500, valve rod 400 and the valve gap 300 has strengthened the structural stability of this anti-silting easy dismouting gate valve for sewage treatment. Further, when the positioning telescopic rod 500 is inserted into the opening hole 420 and the fixing hole 341, the positioning telescopic rod 500 is screwed with the valve rod 400 and the valve cap 300, respectively. So, further promoted this sewage treatment with the structural stability who prevents silting readily removable gate valve.

The elastic member 600 is used to provide an assisting force to the user's closing operation so that the user can resist the resistance of the water flow in the valve seat 100. Each of the elastic members 600 is in elastic deformation, and the elastic members 600 have elastic force to pull the shutter to move close to the bonnet 300, thus facilitating a user to push the shutter 200 to perform a closing operation. In addition, because the elastic force of each elastic component 600 for location telescopic link 500, valve rod 400 and valve gap 300 are in the butt state of tightening all the time, thereby avoid location telescopic link 500 to take place not hard up, avoid destroying the structural stability of this easy dismouting gate valve of anti-silting for sewage treatment, have promoted the structural strength of this easy dismouting gate valve of anti-silting for sewage treatment.

In order to limit the position of each elastic member 600 and prevent each elastic member 600 from separating and shaking, in one embodiment, a plurality of first limiting grooves 350 are formed on one surface of the connecting portion 310 facing the gate 200, and each elastic member 600 is inserted into one of the first limiting grooves 350 and connected to the valve cap 300. Further, a plurality of second limiting grooves 240 are formed in one surface of the gate plate 200 facing the connecting portion 310, and each elastic member 600 is inserted into one of the second limiting grooves 240 and connected to the gate plate 200. Thus, the first and second retaining

grooves

350 and 240 serve as position restrictions for the elastic member 600. So, promoted this sewage treatment with preventing siltation easy dismouting gate valve's structural stability.

In order to promote uniformity of the elastic force applied by each elastic member 600 to the shutter 200, in one embodiment, each elastic member 600 is uniformly distributed around the valve stem 400. Thus, the respective elastic forces are uniformly distributed. So, promoted the action stationarity of flashboard 200 motion, improved the job stabilization nature of this anti-silting easy dismouting gate valve for sewage treatment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The utility model provides a sewage treatment is with preventing silting up easy dismouting gate valve which characterized in that includes: the valve comprises a valve seat, a flashboard, a valve cover, a valve rod, a positioning telescopic rod, a telescopic motor and a plurality of elastic pieces;

the side wall of the flashboard is provided with a sliding block, the inner wall of the valve seat in the valve groove is provided with a sliding groove, the sliding block is matched with the sliding groove, the sliding block is accommodated in the sliding groove and is in sliding connection with the valve seat, and the sliding groove is communicated with the valve groove;

the valve rod is provided with a brake opening hole and a brake closing hole, and the brake closing hole is positioned at one side adjacent to the handle; the valve cover is provided with a fixing part at a position adjacent to the adjusting groove, a fixing hole is formed in the side face of the fixing part, the fixing hole is respectively matched with the opening hole and the closing hole, the positioning telescopic rod is inserted into the fixing hole and the closing hole, the positioning telescopic rod is respectively connected with the valve cover and the valve rod, the telescopic motor is arranged on the valve cover, the control end of the telescopic motor is connected with the positioning telescopic rod, and the telescopic motor is used for controlling the telescopic length of the positioning telescopic rod;

2. The anti-silting easily detachable gate valve for sewage treatment as claimed in claim 1, wherein said positioning telescopic rod comprises a positioning portion and a telescopic portion, said positioning portion and said telescopic portion are connected in sequence, said positioning portion is inserted into said fixing hole and said gate closing hole; the bottom of flashboard is provided with the sealing layer, the sealing layer with the inside wall butt of disk seat.

3. The anti-silting easily detachable gate valve for sewage treatment as claimed in claim 2, wherein said positioning portion is connected to said valve cover and said valve stem, respectively; the flashboard is provided with a fastening groove, and the end part of the valve rod is inserted into the fastening groove and is in threaded connection with the flashboard.

4. The anti-silting gate valve easy to disassemble and assemble for sewage treatment as claimed in claim 3, wherein the positioning part and the telescopic part are both cylindrical structures.

5. The anti-silting gate valve easy to disassemble and assemble for sewage treatment as claimed in claim 4, wherein said positioning part and said telescopic part are arranged non-coaxially, and the bottom of said positioning part and the bottom of said telescopic part are collinear.

6. The anti-silting gate valve easy to detach for sewage treatment according to claim 5, wherein a diameter of the positioning portion is smaller than a diameter of the expansion portion.

7. The anti-silting gate valve easy to assemble and disassemble for sewage treatment as claimed in claim 6, wherein the diameter of the fixing hole is larger than the diameter of the telescopic part.

8. The anti-silting gate valve easy to assemble and disassemble for sewage treatment as claimed in claim 7, wherein said telescopic part is housed in said fixing hole and the tip thereof abuts against said valve stem.

9. The anti-silting gate valve easy to disassemble and assemble for sewage treatment as claimed in claim 8, wherein the output end of said telescopic motor is engaged with said telescopic part.

10. The anti-silting gate valve easy to assemble and disassemble for sewage treatment according to claim 9, wherein a rack is arranged on the outer surface of the telescopic part along the axis, the output end of the telescopic motor is a gear, the telescopic motor drives the gear to rotate when working, and the gear rotates to drive the telescopic part to move along the axis.