阅读说明：本技术 一种手动防盗平板阀 (Manual anti-theft flat valve ) 是由 韩正海 郑耕云 王寅 葛鹏飞 孟庆国 韩政 季海兵 汤洋 侍超 王友文 于 2021-01-25 设计创作，主要内容包括：本发明涉及平板阀,更具体的说是一种手动防盗平板阀。包括连接座Ⅰ、防盗板、弯折部、立架、敲击杆、限位部、压缩弹簧Ⅱ和埋入钉,所述上阀体的后端固接连接座Ⅰ,防盗板滑动连接在连接座Ⅰ上,防盗板的上端固接弯折部,立架固接在防盗板下部的后端,敲击杆滑动连接在立架和防盗板上,敲击杆上固接限位部,限位部的下端面与防盗板的下部贴合,压缩弹簧Ⅱ套在敲击杆上,压缩弹簧Ⅱ的两端分别与防盗板和立架接触,埋入钉固接在敲击杆的下端。埋入钉可钉入地下或混凝土中,可以将埋入钉利用混凝土埋在坑内实现防盗；弯折部弯折贴合在连接座Ⅰ的上端面上,由此无法通过简单拆卸将上阀体与阀体进行分离实现防盗。(The invention relates to a flat valve, in particular to a manual anti-theft flat valve. Including connecting seat I, anti-theft board, kink, grudging post, strike pole, spacing portion, compression spring II and bury the nail, go up the rear end rigid coupling of valve body and connect seat I, anti-theft board sliding connection is on connecting seat I, the upper end rigid coupling kink of anti-theft board, the grudging post rigid coupling is in the rear end of anti-theft board lower part, strikes pole sliding connection on grudging post and anti-theft board, strikes spacing portion of rigid coupling on the pole, the lower terminal surface of spacing portion and the laminating of the lower part of anti-theft board, and II covers on striking the pole of compression spring, the both ends of compression spring II respectively with anti-theft board and grudging post contact, bury the nail rigid coupling and strike the lower extreme at the pole. The embedded nail can be nailed underground or in concrete, and can be embedded in a pit by utilizing the concrete to realize theft prevention; the kink is buckled and is laminated on the up end of connecting seat I, can't separate the realization theftproof with last valve body and valve body through simple dismantlement from this.)

1. The utility model provides a manual theftproof wafer valve, including valve body (1), valve notch (103), valve plate (2), lead screw (201), change cover (202) and last valve body (3), the intercommunication constitutes the passageway about the middle part of valve body (1), the middle part of valve body (1) vertically is equipped with valve notch (103), valve plate (2) sliding connection is in valve notch (103), lead screw (201) rigid coupling is in the upper end of valve plate (2), change cover (202) threaded connection on lead screw (201), go up the upper end of valve body (3) rigid coupling in valve body (1), the lower part of changeing cover (202) is rotated and is connected on last valve body (3), its characterized in that: the manual anti-theft flat valve further comprises a connecting seat I (7), an anti-theft plate (702), a bending part (703), a stand (706), a knocking rod (707), a limiting part (708), a compression spring II (709) and an embedded nail (710), the rear end of the upper valve body (3) is fixedly connected with the connecting seat I (7), the anti-theft plate (702) is slidably connected onto the connecting seat I (7), the upper end of the anti-theft plate (702) is fixedly connected with the bending part (703), the stand (706) is fixedly connected onto the rear end of the lower part of the anti-theft plate (702), the knocking rod (707) is slidably connected onto the stand (706) and the anti-theft plate (702), the knocking rod (707) is fixedly connected with the limiting part (708), the lower end face of the limiting part (708) is attached to the lower part of the anti-theft plate (702), the compression spring II (709) is sleeved on the knocking rod (707), two ends of the compression spring II (709) are respectively contacted with the anti-theft, the embedded nail (710) is fixedly connected with the lower end of the knocking rod (707).

2. The manual anti-theft flat valve according to claim 1, wherein: the upper end face of the connecting seat I (7) is provided with a paint surface (704).

3. The manual anti-theft flat valve according to claim 2, wherein: the manual anti-theft flat valve further comprises a connecting seat II (701) and an embedded pin (705), the connecting seat II (701) is fixedly connected to the rear end of the valve body (1), the front end of the anti-theft plate (702) is in contact with the rear end of the connecting seat II (701), the embedded pin (705) is connected into the anti-theft plate (702) in a sliding mode, the embedded pin (705) is clamped into the connecting seat II (701), and the rear end face of the embedded pin (705) is overlapped with the rear end face of the anti-theft plate (702).

4. The manual anti-theft flat valve according to any one of claims 1 to 3, wherein: an annular groove is arranged on the embedded nail (710).

5. The manual anti-theft flat valve according to claim 4, wherein: this manual theftproof wafer valve still includes introducing pipe II (301), axle (302) and scribbles roller (303), go up the upper end rigid coupling of valve body (3) and communicate two introducing pipes II (301), the upper end of introducing pipe II (301) is detained the lid, goes up to rotate on valve body (3) and connects two axles (302), and roller (303) are scribbled to each rigid coupling on two axles (302), and two are scribbled roller (303) and laminate the left and right sides both ends of valve plate (2) respectively, and two introducing pipes II (301) are located two directly over scribbling roller (303) respectively.

6. The manual anti-theft flat valve according to claim 5, wherein: the manual anti-theft flat valve further comprises a lower valve body (4), exchange pipes (401), a motor (5), a connecting rod (501), a base (503) and an electric push rod (504), wherein the lower valve body (4) is fixedly connected to the lower end of the valve body (1), the left end of the lower valve body (4) is fixedly connected with and communicated with the two exchange pipes (401), the two exchange pipes (401) are respectively located at the upper part and the lower part of the lower valve body (4), an output shaft of the motor (5) is fixedly connected with one end of the connecting rod (501), the connecting rod (501) is located in the lower valve body (4) and is located on the right side of the valve plate (2), the lower end of the motor (5) is fixedly connected with the base (503), the left end of the base (503) is fixedly connected with the movable end of the electric push rod (504), and the electric.

7. The manual anti-theft flat valve according to claim 6, wherein: the manual anti-theft flat valve further comprises a wiping sheet (502), and the other end of the connecting rod (501) is fixedly connected with the wiping sheet (502).

8. The manual anti-theft flat valve according to claim 7, wherein: the manual anti-theft flat valve further comprises an inlet pipe I (104), the inlet pipe I (104) is fixedly connected to the left side of the lower portion of the valve body (1), and the inlet pipe I (104) is communicated with the valve notch (103).

9. The manual anti-theft flat valve according to claim 8, wherein: this manual theftproof wafer valve still includes through-hole (105), heating ring (402) and heating rod (403), the lower part left side of valve body (1) is equipped with two through-holes (105), two through-holes (105) with the passageway intercommunication, lower valve body (4) inside bottom rigid coupling heating ring (402), two heating rods (403) of lower valve body (4) inside bottom rigid coupling, two heating rods (403) extend to through two through-holes (105) in the passageway.

10. The manual anti-theft flat valve according to claim 9, wherein: the manual anti-theft flat valve further comprises an inlet and outlet pipe (101), a flange I (102), a connecting pipe (6), a stepped ring (601), a stepped valve plate (602), a guide pillar (603), a base plate (604), a compression spring I (605) and a flange II (606), wherein the left end and the right end of the valve body (1) are fixedly connected with one inlet and outlet pipe (101), the two inlet and outlet pipes (101) are communicated with the channel, the outer ends of the two inlet and outlet pipes (101) are fixedly connected with one flange I (102), one end of the inner end of the connecting pipe (6) is fixedly connected with the stepped ring (601), the left end of the stepped valve plate (602) is attached to the right end of the stepped valve plate (601), the guide pillar (603) is fixedly connected to the right end of the stepped valve plate (602), the guide pillar (603) is slidably connected to the base plate (604), the compression spring I (605) is sleeved on the guide pillar (603), and two ends of the, two ends of the connecting pipe (6) are fixedly connected with a flange II (606) respectively, and the flange II (606) is fixedly connected with the flange I (102).

Technical Field

The invention relates to a flat valve, in particular to a manual anti-theft flat valve.

Background

For example, the publication number is CN206626258U, the manual anti-theft flat valve comprises a valve body, a rectangular through groove is arranged at the middle position inside the valve body, a flat slider is arranged inside the rectangular through groove, a threaded hole is arranged at the middle position inside the flat slider, one end of the screw rod, which is far away from the flat slider, is connected with a baffle, one side of the baffle, which is far away from the screw rod, is connected with a main shaft, a shaft sleeve is arranged at the upper side of a top cover, the shaft sleeve is connected with the main shaft through a through hole, six groups of threaded holes which are equidistantly and angularly symmetrically distributed are arranged at the eccentric position of the top cover, the top cover is connected with a first hexagon socket head screw through the threaded holes, the first hexagon socket head screw can be fixedly connected with the top cover through a first inserting rod and a second clamping pin, the second hexagon socket head screw can be fixedly connected with a flange through a second inserting rod and a first, the original function is not damaged, and the structure is reasonable; but the anti-theft effect is poor.

Disclosure of Invention

The invention aims to provide a manual anti-theft flat valve which can enhance the anti-theft effect.

The purpose of the invention is realized by the following technical scheme:

a manual anti-theft flat valve comprises a valve body, a valve notch, a valve plate, a lead screw, a rotating sleeve and an upper valve body, wherein the left part and the right part of the middle part of the valve body are communicated to form a channel, the valve notch is longitudinally arranged in the middle part of the valve body, the valve plate is slidably connected in the valve notch, the lead screw is fixedly connected at the upper end of the valve plate, the rotating sleeve is in threaded connection with the lead screw, the upper valve body is fixedly connected at the upper end of the valve body, the lower part of the rotating sleeve is rotatably connected with the upper valve body, the manual anti-theft flat valve further comprises a connecting seat I, an anti-theft plate, a bending part, a vertical frame, a knocking rod, a limiting part, a compression spring II and an embedding nail, the rear end of the upper valve body is fixedly connected with the connecting seat I, the anti-theft plate is slidably connected with the connecting seat I, the bending part is fixedly connected at the upper end of the anti-theft, the compression spring II is sleeved on the knocking rod, two ends of the compression spring II are respectively contacted with the anti-theft plate and the vertical frame, and the embedded nail is fixedly connected to the lower end of the knocking rod.

The upper end face of the connecting seat I is provided with a paint surface.

The manual anti-theft flat valve further comprises a connecting seat II and an embedded pin, wherein the connecting seat II is fixedly connected to the rear end of the valve body, the front end of the anti-theft plate is in contact with the rear end of the connecting seat II, the embedded pin is connected into the anti-theft plate in a sliding mode, the embedded pin is clamped in the connecting seat II, and the rear end face of the embedded pin coincides with the rear end face of the anti-theft plate.

An annular groove is formed in the embedded nail.

The manual anti-theft flat valve further comprises an inlet pipe II, shafts and coating rollers, the upper end of the upper valve body is fixedly connected and communicated with the two inlet pipes II, the upper end of each inlet pipe II is buckled with a cover, the upper valve body is rotatably connected with the two shafts, the two shafts are fixedly connected with one coating roller respectively, the two coating rollers are attached to the left end and the right end of the valve plate respectively, and the two inlet pipes II are located right above the two coating rollers respectively.

The manual anti-theft flat valve further comprises a lower valve body, exchange pipes, a motor, a connecting rod, a base and an electric push rod, wherein the lower valve body is fixedly connected to the lower end of the valve body, the left end of the lower valve body is fixedly connected with and communicated with the two exchange pipes, the two exchange pipes are respectively positioned at the upper part and the lower part of the lower valve body, an output shaft of the motor is fixedly connected to one end of the connecting rod, the connecting rod is positioned in the lower valve body and positioned on the right side of the valve plate, the lower end of the motor is fixedly connected to the base, the left end of the base is fixedly connected to the movable.

The manual anti-theft flat valve further comprises a wiping sheet, and the other end of the connecting rod is fixedly connected with the wiping sheet.

The manual anti-theft flat valve further comprises an introducing pipe I, wherein the introducing pipe I is fixedly connected to the left side of the lower portion of the valve body and is communicated with the valve notch.

This manual theftproof wafer valve still includes through-hole, heating ring and heating rod, the lower part left side of valve body is equipped with two through-holes, two through-holes with the passageway intercommunication, the inside bottom rigid coupling heating ring of lower valve body, two heating rods of the inside bottom rigid coupling of lower valve body, two heating rods extend to through two through-holes in the passageway.

The manual anti-theft flat valve further comprises an inlet and outlet pipe, a flange I, a connecting pipe, a stepped ring, a stepped valve plate, a guide pillar, a base plate, a compression spring I and a flange II, wherein the inlet and outlet pipe is fixedly connected to the left end and the right end of the valve body, the two inlet and outlet pipes are communicated with the channel, the flange I is fixedly connected to the outer ends of the two inlet and outlet pipes, the flange I is fixedly connected to the inner end of the connecting pipe, the stepped ring is attached to the left end of the stepped valve plate, the guide pillar is fixedly connected to the right end of the stepped valve plate, the guide pillar is slidably connected to the base plate, the compression spring I is sleeved on the guide pillar, the two ends of the compression spring I are respectively contacted with the stepped valve plate and the.

The manual anti-theft flat valve has the beneficial effects that:

the embedded nail can be nailed underground or in concrete, and can be embedded in a pit by utilizing the concrete to realize theft prevention; the bent part is bent and attached to the upper end face of the connecting seat I, so that the upper valve body and the valve body cannot be separated through simple disassembly to realize theft prevention; when a thief forcibly turns up the bent part again by taking the upper end face of the connecting seat I as a base point, the paint surface is damaged, and therefore the damaged paint surface is used as a mark to prove that the valve is stolen to achieve anti-theft warning.

Drawings

The invention is described in further detail below with reference to the accompanying drawings and specific embodiments.

FIG. 1 is a schematic view of the overall structure of a manual anti-theft flat valve of the present invention;

FIG. 2 is a partial schematic view of the first embodiment of the present invention;

FIG. 3 is a second partial schematic structural view of the present invention;

FIG. 4 is a third schematic view of a portion of the present invention;

FIG. 5 is a fourth schematic view of a portion of the present invention;

FIG. 6 is a schematic diagram of a portion of the present invention;

FIG. 7 is a schematic diagram six of a portion of the present invention;

FIG. 8 is a seventh schematic view of a portion of the present invention;

FIG. 9 is a partial schematic view eight of the present invention;

fig. 10 is a partial structural schematic diagram nine of the present invention.

In the figure: a valve body 1; an inlet pipe 101; a flange I102; a valve slot 103; an inlet pipe I104; a through hole 105; a valve plate 2; a lead screw 201; a rotating sleeve 202; an upper valve body 3; an inlet pipe II 301; a shaft 302; a coating roller 303; a lower valve body 4; an exchange tube 401; a heating ring 402; a heating rod 403; a motor 5; a connecting rod 501; a wiping sheet 502; a base 503; an electric push rod 504; a connecting pipe 6; a stepped ring 601; a stepped valve plate 602; a guide post 603; a substrate 604; a compression spring I605; a flange II 606; a connecting seat I7; a connecting seat II 701; a security panel 702; a bent portion 703; a painted surface 704; an insert pin 705; a stand 706; a knock bar 707; a stopper 708; a compression spring II 709; the nail 710 is embedded.

Detailed Description

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

The first embodiment is as follows:

as shown in the figure, the manual anti-theft flat valve comprises a valve body 1, a valve notch 103, a valve plate 2, a lead screw 201, a rotary sleeve 202 and an upper valve body 3, wherein the middle part of the valve body 1 is communicated from left to right to form a channel, the middle part of the valve body 1 is longitudinally provided with the valve notch 103, the valve plate 2 is connected in the valve notch 103 in a sliding manner, the lead screw 201 is fixedly connected at the upper end of the valve plate 2, the rotary sleeve 202 is connected on the lead screw 201 in a threaded manner, the upper valve body 3 is fixedly connected at the upper end of the valve body 1, the lower part of the rotary sleeve 202 is rotatably connected on the upper valve body 3, the manual anti-theft flat valve further comprises a connecting seat I7, an anti-theft plate 702, a bending part 703, a vertical frame 706, a knocking rod 707, a limiting part 708, a compression spring II 709 and an embedded nail 710, the rear end of the upper valve body 3 is fixedly connected with the connecting seat I7, the knocking rod 707 is connected with the vertical frame 706 and the anti-theft board 702 in a sliding mode, the knocking rod 707 is fixedly connected with the limiting part 708, the lower end face of the limiting part 708 is attached to the lower portion of the anti-theft board 702, the compression spring II 709 is sleeved on the knocking rod 707, two ends of the compression spring II 709 are respectively in contact with the anti-theft board 702 and the vertical frame 706, and the embedded nail 710 is fixedly connected to the lower end of the knocking rod 707. The connection mode of the connecting seat I7 and the upper valve body 3 is preferably welded, the bottom of the connecting seat I7 is in contact with the ground, the knocking rod 707 is hammered by a tool to enable the embedded nail 710 to be nailed underground or in concrete, the knocking distance is the superposition of the upper end face of the knocking rod 707 and the upper end face of the vertical frame 706, the embedded nail 710 can also extend into a pit, the embedded nail 710 is embedded into the pit by utilizing the concrete, the embedded nail 710 keeps moving downwards by the compression spring II 709, and then the concrete is conveniently poured to enable the embedded nail to be fixed in the pit. Knocking bending part 703 makes bending part 703 buckle and laminate on the up end of connecting seat I7, can't separate upper valve body 3 and valve body 1 through simple dismantlement from this, need destroy connecting seat I7, and the material of connecting seat I7 is preferred steel.

The second embodiment is as follows:

as shown in the figure, the upper end face of the connecting seat I7 is provided with a painted surface 704. When the bending portion 703 is bent to be attached to the upper end face of the connecting seat I7 and then contacts the paint surface 704, the bending portion 703 is attached to the upper end face of the connecting seat I7 and is not convenient to tilt, when a thief forcibly tilts the bending portion 703 again by using the upper end face of the connecting seat I7 as a base point, the paint surface 704 is damaged, and therefore the damaged paint surface 704 serves as an identifier, and the valve is proved to be stolen.

The third concrete implementation mode:

as shown in the figure, the manual anti-theft flat valve further comprises a connecting seat II 701 and an embedded pin 705, the connecting seat II 701 is fixedly connected to the rear end of the valve body 1, the front end of the anti-theft plate 702 is in contact with the rear end of the connecting seat II 701, the embedded pin 705 is connected in the anti-theft plate 702 in a sliding mode, the embedded pin 705 is clamped in the connecting seat II 701, and the rear end face of the embedded pin 705 is overlapped with the rear end face of the anti-theft plate 702. The front end of the embedded pin 705 is narrow so as to be inserted into the connecting seat II 701, and then the embedded pin 705 is hammered to be forcibly inserted into the connecting seat II 701, so that the embedded pin 705 can be pulled out without a stress point, and the valve body 1 is partially prevented from being stolen.

The fourth concrete implementation mode:

as shown, the embedded nail 710 is provided with an annular groove. The annular groove facilitates a firm fixation with poured concrete.

The fifth concrete implementation mode:

as shown in the figure, the manual anti-theft flat valve further comprises a leading-in pipe II 301, shafts 302 and coating rollers 303, the upper end of the upper valve body 3 is fixedly connected and communicated with the two leading-in pipes II 301, the upper end of the leading-in pipe II 301 is buckled with a cover, the upper valve body 3 is rotatably connected with the two shafts 302, the two shafts 302 are fixedly connected with one coating roller 303 respectively, the two coating rollers 303 are attached to the left end and the right end of the valve plate 2 respectively, and the two leading-in pipes II 301 are located right above the two coating rollers 303 respectively. When the cover is opened, the maintenance liquid is dropped onto the coating roller 303 through the inlet pipe II 301, and the valve plate 2 can be maintained when being lifted.

The sixth specific implementation mode:

as shown in the figure, the manual anti-theft flat valve further comprises a lower valve body 4, exchange pipes 401, a motor 5, a connecting rod 501, a base 503 and an electric push rod 504, wherein the lower valve body 4 is fixedly connected to the lower end of the valve body 1, the left end of the lower valve body 4 is fixedly connected to and communicated with the two exchange pipes 401, the two exchange pipes 401 are respectively located at the upper part and the lower part of the lower valve body 4, an output shaft of the motor 5 is fixedly connected to one end of the connecting rod 501, the connecting rod 501 is located in the lower valve body 4 and located on the right side of the valve plate 2, the lower end of the motor 5 is fixedly connected to the base 503, the left end of the base 503 is fixedly connected to the. The opening of the exchange tube 401 is provided with a cover which can be opened or closed, the exchange tube 401 at a high position injects cleaning liquid into the lower valve body 4, the valve plate 2 descends, then the valve plate 2 is enabled to be coincident with the axis of the output shaft of the motor 5, the electric push rod 504 is started to enable the connecting rod 501 to enter the inner annular surface, the motor 5 is started to drive the connecting rod 501 to rotate to independently clean the inner annular surface of the valve plate 2, scale or rust on the connecting rod is removed, and the cleaning liquid after use is discharged through the exchange tube 401 at a low position.

The seventh embodiment:

as shown in the figure, the manual anti-theft flat valve further comprises a wiping sheet 502, and the other end of the connecting rod 501 is fixedly connected with the wiping sheet 502. The wiping sheet 502 increases the cleaning effect.

The specific implementation mode is eight:

as shown in the figure, the manual anti-theft flat valve further comprises an inlet pipe I104, wherein the inlet pipe I104 is fixedly connected to the left side of the lower part of the valve body 1, and the inlet pipe I104 is communicated with the valve notch 103. The valve plate 2 descends to surround the inlet pipe I104 by the inner annular surface of the valve plate 2, and liquid for removing dirt is filled into the inlet pipe I104 and flows onto the inner end surface of the lower part of the valve plate 2.

The specific implementation method nine:

as shown in the figure, the manual anti-theft flat valve further comprises a through hole 105, a heating ring 402 and heating rods 403, wherein the left side of the lower part of the valve body 1 is provided with two through holes 105, the two through holes 105 are communicated with the channel, the bottom end inside the lower valve body 4 is fixedly connected with the heating ring 402, the bottom end inside the lower valve body 4 is fixedly connected with the two heating rods 403, and the two heating rods 403 extend into the channel through the two through holes 105. The heating ring 402 and the heating rod 403 are used for freeze protection.

The detailed implementation mode is ten:

as shown in the figure, the manual anti-theft flat valve further comprises an inlet and outlet pipe 101, a flange i 102, a connecting pipe 6, a stepped ring 601, a stepped valve plate 602, a guide pillar 603, a base plate 604, a compression spring i 605 and a flange ii 606, the left end and the right end of the valve body 1 are fixedly connected with one inlet and outlet pipe 101 respectively, the two inlet and outlet pipes 101 are communicated with the channel, the outer ends of the two inlet and outlet pipes 101 are fixedly connected with one flange i 102 respectively, one end of the inner end of the connecting pipe 6 is fixedly connected with the stepped ring 601, the left end of the stepped valve plate 602 is attached to the right end of the stepped ring 601, the guide pillar 603 is fixedly connected to the right end of the stepped valve plate 602, the guide pillar 603 is connected to the base plate 604 in a sliding mode, the compression spring i 605 is sleeved on the guide pillar 603, the two ends of the compression spring i 605 are respectively. The one-way movement direction of the stepped valve plate 602 can be changed by changing the installation direction of the connecting pipe 6, and then the backflow prevention function is achieved according to the requirement.

The invention relates to a manual anti-theft flat valve, which has the working principle that:

the connection mode of the connecting seat I7 and the upper valve body 3 is preferably welded, the bottom of the connecting seat I7 is in contact with the ground, the knocking rod 707 is hammered by a tool to enable the embedded nail 710 to be nailed underground or in concrete, the knocking distance is the superposition of the upper end face of the knocking rod 707 and the upper end face of the vertical frame 706, the embedded nail 710 can also extend into a pit, the embedded nail 710 is embedded into the pit by utilizing the concrete, the embedded nail 710 keeps moving downwards by the compression spring II 709, and then the concrete is conveniently poured to enable the embedded nail to be fixed in the pit. Knocking bending part 703 makes bending part 703 buckle and laminate on the up end of connecting seat I7, can't separate upper valve body 3 and valve body 1 through simple dismantlement from this, need destroy connecting seat I7, and the material of connecting seat I7 is preferred steel. When the bending portion 703 is bent to be attached to the upper end face of the connecting seat I7 and then contacts the paint surface 704, the bending portion 703 is attached to the upper end face of the connecting seat I7 and is not convenient to tilt, when a thief forcibly tilts the bending portion 703 again by using the upper end face of the connecting seat I7 as a base point, the paint surface 704 is damaged, and therefore the damaged paint surface 704 serves as an identifier, and the valve is proved to be stolen. The front end of the embedded pin 705 is narrow so as to be inserted into the connecting seat II 701, and then the embedded pin 705 is hammered to be forcibly inserted into the connecting seat II 701, so that the embedded pin 705 can be pulled out without a stress point, and the valve body 1 is partially prevented from being stolen. The annular groove facilitates a firm fixation with poured concrete. When the cover is opened, the maintenance liquid is dropped onto the coating roller 303 through the inlet pipe II 301, and the valve plate 2 can be maintained when being lifted. The opening of the exchange tube 401 is provided with a cover which can be opened or closed, the exchange tube 401 at a high position injects cleaning liquid into the lower valve body 4, the valve plate 2 descends, then the valve plate 2 is enabled to be coincident with the axis of the output shaft of the motor 5, the electric push rod 504 is started to enable the connecting rod 501 to enter the inner annular surface, the motor 5 is started to drive the connecting rod 501 to rotate to independently clean the inner annular surface of the valve plate 2, scale or rust on the connecting rod is removed, and the cleaning liquid after use is discharged through the exchange tube 401 at a low position. The wiping sheet 502 increases the cleaning effect. The valve plate 2 descends to surround the inlet pipe I104 by the inner annular surface of the valve plate 2, and liquid for removing dirt is filled into the inlet pipe I104 and flows onto the inner end surface of the lower part of the valve plate 2. The heating ring 402 and the heating rod 403 are used for freeze protection. The one-way movement direction of the stepped valve plate 602 can be changed by changing the installation direction of the connecting pipe 6, and then the backflow prevention function is achieved according to the requirement.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.