CN220435436U

CN220435436U - Butterfly valve with check valve

Info

Publication number: CN220435436U
Application number: CN202321652534.3U
Authority: CN
Inventors: 洪本灿
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-06-27
Filing date: 2023-06-27
Publication date: 2024-02-02
Anticipated expiration: 2033-06-27

Abstract

The utility model discloses a butterfly valve with a check valve, which is provided with a valve body, a valve plate and a valve seat, wherein a water outlet is formed in the valve body, a sealing plug is detachably arranged on the valve body, the valve body is provided with a left pipe body and a right pipe body, the valve seat is detachably arranged with the right pipe body through a mounting block, a limiting structure is arranged on the mounting block and the sealing ring, the left pipe body is provided with a mounting section and a sealing section, the valve seat is detachably arranged with the mounting section, a first mounting block, a moving block and a second mounting block are arranged in the mounting section, the second mounting block is arranged in the mounting section, the first mounting block is arranged outside the left side of the moving block and is in sealing fit with the sealing section, the moving block is provided with a left sealing part and a right rod part, the left sealing part is in sealing fit with the first mounting block, the right rod part movably penetrates through the second mounting block, and the right rod part is sleeved with a tensioning spring; compared with the prior art, the sealing ring is not easy to displace under the action of the limiting structure, and if the sealing plug is screwed out of the water outlet in cold weather, the problem that the valve plate is fixed by ice and inconvenient to use can be avoided.

Description

Butterfly valve with check valve

Technical Field

The utility model relates to the field of butterfly valves, in particular to a butterfly valve with a check valve.

Background

The existing butterfly valve mainly comprises a valve body, a valve plate, a valve seat and a valve rod, wherein the valve body and the valve seat are hollow tubular structures with two open ends, the valve seat is arranged outside one end of the valve body and is communicated with the valve body, the valve plate is a plate body, the valve plate is rotationally erected in the valve seat and seals the valve seat, the valve rod is erected on the valve seat, the lower end of the valve rod stretches into the valve seat to be connected with the valve plate, the upper end of the valve rod is arranged outside the valve seat, and a sealing ring in sealing fit with an inner cavity of the valve seat is sleeved outside the valve plate; when the valve is installed, one end of the valve body, which is away from the valve seat, is connected with a water inlet pipe, and one end of the valve seat, which is away from the valve body, is connected with a water outlet pipe; when the valve is used, the valve rod is rotated, the valve plate rotates in the valve seat, a water passing channel is formed between the valve plate and the inner cavity wall of the valve seat, water flows through the water inlet pipe, the valve body and the water passing channel in sequence, and finally flows into the water outlet pipe through the water passing channel.

However, in the use of the butterfly valve, the pressure of water flow can wash the valve plate to enable the valve plate to generate a small-angle offset plate, so that the water outlet pipe leaks water, the sealing ring is also easy to displace due to the impact force of the water flow due to the tight fit of the sealing ring and the valve plate, the sealing fit effect of the sealing ring and the valve plate is poor, the water outlet pipe leaks water, water flow stays in the valve body when the valve plate is closed, and if the water left in the valve body is frozen in cold weather, the valve plate is fixed by ice, and the butterfly valve is inconvenient to use.

In view of the above, the present inventors have conducted intensive studies on the above problems, and have produced the present utility model.

Disclosure of Invention

The utility model aims to provide a butterfly valve with a check valve, which solves the problems that the existing butterfly valve is easy to leak water and is not anti-freezing.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

a butterfly valve with check valve, have valve block, valve plate and valve seat, valve block and valve seat are the hollow structure that both ends open, the valve seat is located on valve block, the valve plate cooperates with valve seat seal, there are seal rings mounted with valve plate seal on the valve seat; the water flow direction of the valve body is used as the left direction and the right direction, the water outlet communicated with the hollow cavity of the valve body is formed in the bottom surface of the valve body, the sealing plug for sealing the water outlet is detachably mounted on the valve body, the valve body is provided with a left pipe body and a right pipe body, the right end of the valve seat is detachably mounted with the right pipe body through a mounting block, the mounting block and the sealing ring are provided with limiting structures for avoiding the displacement of the sealing ring, the left pipe body is provided with a mounting section and a sealing section at the left side of the mounting section, the left end of the valve seat is detachably mounted with the right end of the mounting section, the bottom surface of the mounting section is provided with the water outlet, the mounting section is internally provided with a check valve, the check valve is provided with a first mounting block, a moving block and a second mounting block, the second mounting block is positioned at the right side of the first mounting block, the first mounting block is positioned in the sealing section range, the first mounting block is positioned at the left side of the outer side of the moving block and is in sealing fit with the sealing section, the moving block is provided with a left sealing part and a right rod part, the left sealing part is in sealing fit with the first mounting block, the right rod part movably passes through the second mounting block, and the right rod part is movably arranged between the left mounting block and the left tensioning part and the second tensioning part is provided with the spring.

The bottom surface of installation section has offered above-mentioned water outlet, and the sealing plug has screw section and sealed installation section, and screw section screw installation is in the water outlet, and sealed installation section closely cooperates with the lateral wall of installation section.

The valve seat is a hollow pipe body structure which is left and right open, a closed-loop spiral-in groove which is communicated with the hollow space of the valve seat is concavely arranged left on the right end face of the valve seat, the installation block is of a closed-loop pipe body structure, a left side face of the installation block is convexly provided with a left spiral-in block which can extend into the closed-loop spiral-in groove and is in spiral-in connection with the groove wall of the closed-loop spiral-in groove in a left protruding mode, the sealing ring is attached to the inner side wall of the valve seat, a closed-loop convex strip which extends into the groove bottom of the closed-loop spiral-in groove and the spiral-in block is convexly arranged on the outer side wall of the right end of the sealing ring, and the closed-loop convex strip and the left spiral-in block form the limiting structure.

The valve seat is vertically provided with a valve rod for controlling the valve plate, the upper end of the valve rod extends out of the valve seat, the top surface of the valve seat is provided with a limiting column in an upward protruding mode, the limiting column is of a hollow structure, the upper end of the valve rod extends out of the limiting column, the outer side wall of the valve rod is sleeved with an O-shaped ring in sealing fit with the limiting column, the O-shaped ring is located at the lower end of the limiting column, the upper end of the limiting column is internally provided with a plug, the lower end of the plug is spirally arranged at the upper end of the limiting column and is abutted against the top surface of the limiting column, the plug is sleeved out of the upper end of the valve rod, the upper end of the valve rod is fixedly provided with a handle component, the lower end of the valve rod extends into the valve seat and is connected with the valve plate and extends out of the valve seat downwards, and the bottom surface of the valve seat is provided with a lower end part of the valve rod in a downward protruding mode.

The installation piece is protruding right spiral shell and closes the piece right, and right spiral shell closes the piece and is closed loop structure, and right spiral shell closes the internal diameter of piece and the internal diameter of installation piece unanimous, right spiral shell closes the external diameter of piece and is less than the external diameter of installation piece, right body is closed loop tube body structure, the left end portion of right body be equipped with right end face seal fit's of right spiral shell and laminate the piece, laminate the piece epirelief be equipped with the cover locate right spiral shell and close the piece outside and with right spiral shell and close the spiral shell bulge loop that the piece spiral shell is connected, right spiral shell closes the right end face of piece and presss from both sides tightly between the laminating piece and has the plain washer.

The left end face of the valve seat protrudes to form a closed-loop convex ring which stretches into the right end of the sealing section, an external thread is arranged on the outer side wall of the closed-loop convex ring, and an internal thread matched with the external thread is arranged on the inner side wall of the right end of the sealing section.

The second installation piece spiral shell dress is in the installation section, is equipped with the hole that stretches into that supplies right pole portion to stretch into on the second installation piece, is in the water hole that supplies rivers to pass through that stretches into outside the hole on the second installation piece, and left sealing portion is circular plate body structure, and the left surface of left sealing portion is equipped with sealing gasket, the external diameter of installation section is less than the external diameter of sealing section, first installation piece and sealing section integrated into one piece are connected, the internal diameter of first installation piece is less than the internal diameter of installation section, be formed with first step face between the right flank of first installation piece and the installation section, the right flank of first step face is protruding to be equipped with the pressure piece that stacks on sealing gasket to the right.

The inner diameter of the installation section is smaller than that of the sealing section, a closed-loop protruding block is arranged on the inner side wall of the installation section in a protruding mode, an embedded groove is concavely formed in the left side of the closed-loop protruding block to the right, the right end of the second installation block is located in the embedded groove, a plurality of water passing columns are convexly arranged on the left side face of the second installation block in a protruding mode, water passing ports communicated with the intervals among the water passing columns are formed in the second installation block, the water passing columns are uniformly arranged at intervals along the circumferential direction, the left end of each water passing column is located in the sealing section range, a sealing block is convexly arranged in the center direction of the right rod portion at the left end of each water passing column, the inner diameter of the sealing block is smaller than that of each water passing column, the inner side wall of the sealing block is closely matched with the outer side wall of each water passing column, the left sealing portion is located between the sealing blocks, the left end face of the left sealing portion is convexly curved to the left, the right end of the left sealing portion is convexly arranged to the right, and the outer side wall of the right sealing portion is convexly arranged to the right.

The left end face of the sealing section is provided with a screw groove in a right concave mode, the first mounting block is provided with a horizontal straight portion and a vertical portion located on the left side of the horizontal straight portion, the vertical portion is screwed in the screw groove, the horizontal straight portion is screwed with the outer side wall of each water column, a stepped surface is formed between the right side face of the inner end of the vertical portion and the horizontal straight portion, and sealing sheets located among the first mounting block, the water columns and the left sealing portion are closely matched on the stepped surface.

The left side face of the first installation block is provided with an embedded groove in a concave manner to the right, and the left sides of the first installation section and the sealing section are provided with sealing embedded rings which extend into the embedded groove.

According to the butterfly valve with the check valve, when the butterfly valve is assembled, the sealing ring is closely adhered to the valve seat and is limited under the action of the limiting structure, so that the problem that the sealing ring is easy to displace under the impact of water flow is avoided; the right end of the valve seat and the right pipe body are mounted together by using the mounting block; then the check valve stretches into the mounting section from the left end opening of the mounting section and is matched with the first mounting block in a sealing way, and finally the left end of the valve seat and the mounting section are mounted together, so that the mounting is completed; when the sealing device is applied, water flow enters from the left opening of the first mounting block, the water flow impacts the left sealing part, the left sealing part is compressed rightwards under the action of the tensioning spring, and a gap is formed between the left sealing part and the first mounting block, so that the water flow passes through the valve plate, the valve plate rotates in the valve seat, a water passage is formed between the valve plate and the inner cavity wall of the valve seat, the water flow flows into the right pipe body through the water passage, at the moment, the sealing ring is limited, and the problem that the sealing ring is easy to displace under the impact of the water flow is avoided under the impact of the water flow; compared with the prior art, under the effect of check valve, when rivers flow from left to right, the phenomenon of backward flow can not appear, and the sealing washer also is difficult for appearing the displacement under limit structure's effect moreover, simultaneously, if meet cold weather time, with sealing plug spiral shell outlet, then can discharge the internal water of valve to can make the water that leaves in the valve body freeze when meeting cold weather, cause the valve plate to be fixed by ice and use inconvenient problem.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Fig. 2 is a schematic diagram of another embodiment of the present utility model.

Detailed Description

For further explanation of the technical scheme of the present utility model, the following is described in detail with reference to the accompanying drawings.

1-2, the butterfly valve with check valve, as shown in figure 1-2, have valve block, valve plate 1 and valve seat 2, valve block and valve seat 2 are both hollow structures with open two ends, the valve seat 2 is located on valve block, the valve plate 1 cooperates with valve seat 2 sealingly, there is a seal ring 3 mounted with valve plate 1 sealingly on the valve seat 2; the water flow direction of the valve body is taken as the left-right direction, the valve body is provided with a left pipe body 4 and a right pipe body 5, the right end of the valve seat 2 is detachably mounted with the right pipe body 5 through a mounting block 6, and the mounting block 6 and the sealing ring 3 are provided with limiting structures for avoiding the displacement of the sealing ring 3; specifically, the valve seat 2 is a hollow tube structure that is left and right open, a closed-loop threaded groove (not shown in the figure) that is communicated with the hollow space of the valve seat 2 is concavely formed in the left end face of the right end of the valve seat 2, the mounting block 6 is in a closed-loop tube structure, a left threaded block 61 that can extend into the closed-loop threaded groove and is in threaded connection with the groove wall of the closed-loop threaded groove is convexly formed in the left side face of the mounting block 6 to the left, namely, a first external thread is formed on the outer side wall of the left threaded block 61, a first internal thread that is in threaded connection with the first external thread is formed in the groove wall of the closed-loop threaded groove, a sealing space is formed between the left side face of the left threaded block 61 and the groove bottom of the closed-loop threaded groove, the sealing ring is a silica gel sealing ring, the outer side wall of the sealing ring 3 is attached to the inner side wall of the valve seat 2, a closed-loop raised strip 31 that extends into the groove bottom of the closed-loop threaded groove and is convexly formed in the right end outer side face of the sealing ring 3, namely, the closed-loop raised strip 31 is embedded in the sealing space, the left side face of the mounting block 6 is provided with a closed-loop raised strip 31 that is matched with the inner end face of the left side face of the valve seat 2, and the left side face 31 is formed by the raised strip 31; when the sealing ring 3 is used, the left side surface of the closed-loop convex strip is positioned in the valve seat and is contacted with the groove bottom of the closed-loop screwing groove, the left screwing block 61 of the mounting block 6 is screwed into the closed-loop screwing groove until the closed-loop convex strip 31 is pressed in the sealing interval, the closed-loop convex strip 31 is limited in the sealing interval under the overlapping pressure of the left screwing block 61, and the sealing ring is not easy to move during water flow flushing, and meanwhile, the sealing ring 3 can be used in a very low or very high fluid temperature state by adopting the sealing ring made of silica gel.

The installation block 6 is provided with a right screwing block 62 in a protruding way to the right, the right screwing block 62 is in a closed loop structure, the inner diameter of the right screwing block 62 is consistent with the inner diameter of the installation block 6, the outer diameter of the right screwing block 62 is smaller than the outer diameter of the installation block 6, the inner diameter of the right screwing block 62 is consistent with the inner diameter of the right pipe body 5, the right pipe body 5 is a water outlet pipe for water supply flow, the right pipe body 5 is in a closed loop pipe body structure, the left end part of the right pipe body 5 is provided with an attaching block 51 in sealing fit with the right end face of the right screwing block 62, the attaching block 51 is provided with a screwing convex ring 511 sleeved outside the right screwing block 62 and in screwing connection with the right screwing block 62 in a protruding way, namely, the outer side wall of the right end of the right screwing convex ring 62 is provided with a second external thread, the inner side wall of the screwing convex ring 511 is provided with a second internal thread matched with the second external thread, the second external thread and the second internal thread adopt circular threads, the outer diameter of the screwing convex ring 511 is consistent with the outer diameter of the valve seat 2, and a gasket is clamped between the right end face of the right screwing block 62 and the attaching block 621; in application, the right screwing block 62 is screwed with the screwing convex ring 511 through the cooperation of the second external thread and the second internal thread, and under the action of the flat gasket 621, water flow is prevented from flowing out of a gap between the right screwing block 62 and the right pipe body 5, in addition, the round thread can prevent dirt accumulation and mechanical damage, and the edge of the round thread is less fragile than the edge of the sharp thread and is more wear-resistant.

The valve seat 2 is vertically provided with a valve rod 21 for controlling the valve plate, the upper end of the valve rod extends out of the valve seat 2, the top surface of the valve seat 2 is provided with a limit post 22 in an upward protruding way, the limit post 22 is in a hollow structure penetrating up and down, the top surface of the valve seat is provided with an upper through hole in a downward concave way, the upper through hole is in the hollow range of the limit post 22, the upper end of the valve rod 21 extends out of the limit post 22 upwards from the upper through hole, the outer side wall of the valve rod 21 is sleeved with an O-shaped ring 211 in sealing fit with the limit post 22, the O-shaped ring 211 is a tetrafluoro sealing ring, the O-shaped ring is positioned in the lower end of the limit post 22, the upper end of the limit post 22 is internally provided with a plug 221, the lower end of the plug 221 is screwed in the upper end of the limit post 22 and the upper end of the limit post 22 is propped against the top surface of the limit post 22, the plug 221 is sleeved outside the upper end of the valve rod 21, namely, the plug 221 is provided with a horizontal part and a vertical part below the horizontal part, the horizontal part and the vertical part are hollow structures which are vertically penetrated, the outer end face of the horizontal part is positioned outside the outer end face of the vertical part, a third external thread is arranged on the outer side wall of the vertical part, a third internal thread matched with the third external thread is arranged on the inner side wall of the upper end of the limit column 22, the bottom surface of the horizontal part is propped against the top surface of the limit column 22, the upper end part of the valve rod 21 is fixed with a handle part 212, the bottom surface of the valve seat 2 is concavely provided with a lower through hole which is vertically aligned with the upper through hole, the lower end of the valve rod 21 stretches into the valve seat 2 to be connected with the valve plate 1 and downwards stretches out of the valve seat 2 through the lower through hole, and a stretching block 23 for the lower end part of the valve rod 21 to stretch into is convexly arranged on the bottom surface of the valve seat 2 downwards; when the valve rod is applied, the valve rod 21 sequentially passes through the limit post 22, the upper through hole, the valve plate and the lower through hole from top to bottom to extend into the block 23, the O-shaped ring 211 is sleeved in the lower end of the limit post 22, and the vertical part of the plug 221 is screwed in the upper end of the limit post 22 through the matching of the third external thread and the fourth external thread, so that the installation is completed; the upper through hole, the lower through hole and the extending block 23 are arranged, so that the valve seat 2 is more convenient to process, only the through hole matched with the valve rod is arranged on the valve seat 2, and the extending block 23 also enables the valve rod 21 to timely know whether the valve rod is in place or not during installation, so that the installation is more convenient; moreover, the valve rod is limited in the limiting column 22 by the plug 221, so that the valve rod 21 is not easy to deviate; in addition, the O-ring 211 can be uniformly attached to the inside and outside of the stopper post 22 by using a tetrafluoro seal ring.

The left pipe body 4 is provided with a mounting section 41 and a sealing section 42 positioned at the left side of the mounting section 41, and the left end of the valve seat 2 is detachably mounted with the right end of the mounting section 41; specifically, the left end face of the valve seat 2 protrudes to form a closed-loop convex ring 24 extending into the right end of the sealing section 42, a fourth external thread is arranged on the outer side wall of the closed-loop convex ring 24, and a fourth internal thread matched with the fourth external thread is arranged on the inner side wall of the right end of the sealing section 42; when the valve seat is applied, the closed-loop convex ring 24 is screwed into the right end part of the mounting section 41 under the cooperation of the fourth external thread and the fourth internal thread, namely, the left pipe body 4 and the valve seat 2 are mounted.

The check valve 7 is arranged in the mounting section 41, the check valve 7 is provided with a first mounting block 71, a moving block 72 and a second mounting block 73, the second mounting block 73 is positioned in the range of the mounting section 41, the second mounting block 73 is positioned on the right side of the first mounting block 71, the first mounting block 71 is positioned in the range of the sealing section 42, the first mounting block 71 is positioned outside the left side of the moving block 72 and is in sealing fit with the sealing section 42, the moving block 72 is provided with a left sealing part 721 and a right rod part 722, the left sealing part 721 is in sealing fit with the first mounting block 71, the right rod part 722 movably passes through the second mounting block 73, and a tensioning spring tensioned between the left sealing part 721 and the second mounting block 73 is sleeved outside the right rod part 722; specifically, the second mounting block 73 is screwed in the mounting section 41, an extending hole into which the right shaft portion 722 extends is formed in the second mounting block 73, a water passing hole through which water passes is formed outside the extending hole in the second mounting block 73, the left sealing portion 721 is in a circular plate body structure, a sealing gasket 7211 is arranged on the left side surface of the left sealing portion 721, a sealing groove is concavely formed in the left side surface of the left sealing portion 721 to the right, the sealing gasket 7211 is embedded in the sealing groove, the outer diameter of the mounting section 41 is smaller than the outer diameter of the sealing section 42, the first mounting block 71 is integrally connected with the sealing section 42, the inner diameter of the first mounting block 71 is smaller than the inner diameter of the mounting section 41, a first step surface is formed between the right side surface of the first mounting block 71 and the mounting section 41, and a stacking block 711 stacked on the sealing gasket is convexly arranged on the right side surface of the first step surface; when assembling, the check valve 7 is inserted into the mounting section 41 from the right end opening of the mounting section 41, the sealing gasket 7211 is closely matched with the stacking block 711, and the second mounting block 73 is screwed into the sealing section 41, so that the mounting is completed.

The bottom surface of the mounting section 41 is provided with a water outlet communicated with the hollow cavity of the valve body, and the valve body is detachably provided with a sealing plug 411 for sealing the water outlet; specifically, the bottom surface of the valve body is provided with the water outlet, the sealing plug 411 is provided with a screwing section and a sealing installation section, the screwing section is screwed in the water outlet, and the sealing installation section is closely matched with the outer side wall of the installation section 41. When the valve is applied, if the valve meets cold weather, the screwed section of the sealing plug 411 is screwed out of the water outlet, water in the installation is discharged, and the phenomenon that the check valve or the valve plate cannot work normally due to freezing of water in the valve body is avoided.

When the butterfly valve with the check valve is assembled, the sealing ring 3 is closely attached to the valve seat 2, the closed-loop convex strip 31 is attached to the bottom of the closed-loop threaded groove, the left threaded block 61 of the mounting block 6 is threaded into the closed-loop threaded groove, and the closed-loop convex strip 31 is pressed between the valve seat 2 and the left threaded block 61 to be limited; the mounting block 6 and the right pipe body are dismounted by utilizing the cooperation of the threaded convex ring 511 and the right threaded block 62; then the check valve 7 extends into the mounting section 41 from the left end opening of the mounting section 41, and is in sealing fit with the first mounting block 71 under the action of the sealing gasket 7211 and the stacking block 711, and finally the closed-loop convex ring 24 of the valve seat 2 is screwed into the right end part of the mounting section 41, so that the mounting is completed; when the sealing device is applied, water flow enters from the left opening of the first mounting block 71, the water flow impacts the left sealing part 721, the left sealing part 721 is compressed rightwards under the action of the tensioning spring, and a gap is formed between the left sealing part 721 and the stacking block 711, so that the water flow passes through the water passing hole, at the moment, the valve rod 21 is rotated, the valve plate 1 rotates in the valve seat 2, a water passing channel is formed between the valve plate 1 and the inner cavity wall of the valve seat 2, and the water flow flows into the right pipe body 5 through the water passing channel, at the moment, because the sealing ring is limited under the action of the limiting structure, the problem that the sealing ring 3 is easy to displace under the impact of the water flow is avoided under the impact of the water flow; compared with the prior art, under the effect of check valve 7, when rivers flow from left to right, the phenomenon of backward flow can not appear, sealing washer 3 is difficult for appearing the displacement under limit structure's effect in addition, simultaneously, if meet cold weather time, the spiral shell dress section spiral shell of sealing plug goes out the outlet, then can discharge the water in the installation section 41 to can make the water that leaves in the valve body freeze when meeting cold weather, cause the valve plate to be fixed by ice and use inconvenient problem.

In the present utility model, preferably, the inner diameter of the mounting section 41 is smaller than the inner diameter of the sealing section 42, the inner side wall of the mounting section 41 is convexly provided with a closed annular bump 411, the left side of the closed annular bump 411 is concavely provided with an embedded groove to the right, the right end of the second mounting block 73 is positioned in the embedded groove, the second mounting block is provided with an extending hole into which the right rod portion extends, the left side surface of the second mounting block 73 is convexly provided with a plurality of water passing columns 731 to the left, the second mounting block 73 is provided with water passing ports communicated with the space between the water passing columns 731, the water passing columns 731 are uniformly arranged at intervals along the circumferential direction, the left end of each water passing column 731 is positioned in the sealing section 42, the left end part of each water passing column 731 is convexly provided with a sealing block 7311 to the right rod portion center direction 722, the inner diameter of each water passing block 7311 is smaller than the inner diameter of each water passing column 731, the inner side wall of each water passing block is closely matched with the outer side wall of each water passing column 731, the left sealing part 721 is positioned between each sealing block, the left end face of each water passing column is convexly provided with a convexly cambered surface which is convexly left, the left end face of each water passing column 731 is uniformly arranged at intervals along the circumferential direction, the left end of each water passing column 731 is uniformly arranged in the range, the right end of the direction is provided with the right end face of each water passing column 7211, which is closely contacted with the right side wall of the right end of the bump 7211; the left end face of the sealing section 42 is concavely provided with a screw groove to the right, the inner diameter of the screw groove, the inner diameter of the sealing section and the inner diameter of the mounting section are gradually reduced from left to right, the first mounting block 71 is provided with a transverse straight part 711 and a vertical part 712 positioned on the left side of the transverse straight part 711, the vertical part 712 is screwed in the screw groove, the transverse straight part 711 is positioned in the range of the sealing section 42 and is screwed with the outer side wall of each water passing column 731, a step surface is formed between the right side surface of the inner end of the vertical part 712 and the transverse straight part 711, and a sealing piece 9 positioned among the first mounting block 71, each water passing column 731 and the left sealing part 721 is closely matched on the step surface; when the check valve 7 is assembled, the check valve 7 extends into the mounting section 41 from the left end opening of the sealing section 42, the sealing piece 9 is arranged between the first mounting block 71, each water column 731 and the left sealing part 721 in a cushioning mode, the second mounting block 73 is mounted in the range of the embedded groove, and then the transverse straight part 711 extends into the space between the sealing section 42 and each water column 731 and is screwed together with each water column 731 to complete the mounting of the check valve 7; in application, the water flow impacts the left sealing part 721 from left to right, the left sealing part 721 is compressed rightwards under the compression action of the tensioning spring and is far away from each sealing block 7311, at this time, a space is generated between the left sealing part 721 and each water passing column 731, so that the water flow flows out from the water passing port, and in addition, the sealing performance between each water passing column 731 and the left sealing part 721 is improved due to the cooperation of the right protruding block 7211 and each sealing block 7311.

In the present utility model, it is preferable that the left side surface of the first mounting block 71 is concavely provided with an embedding groove to the right, the left sides of the first mounting block 7 and the sealing section 42 are provided with a sealing embedding ring 8 extending into the embedding groove, the sealing embedding ring 8 is provided with a left vertical part and a right transverse part positioned on the right side of the left vertical part, the outer end right side wall of the left vertical part is closely matched with the left side wall of the mounting section 41, the inner end right side wall of the left vertical part is closely matched with the left side wall of the vertical part 712, and the right transverse part is tightly embedded in the embedding groove; in use, the transverse portion of the seal insert ring 8 is inserted into the insert groove, and the seal insert ring 8 enhances the tightness between the mounting section 41 and the upright portion 712.

In the present utility model, preferably, the attaching block 51 has a closed-loop structure, the outer side wall of the right end of the attaching block 51 is concavely provided with a closed-loop groove towards the center direction of the right tube body 5, the screwing convex ring 511 has a closed-loop structure, and the inner side wall of the screwing convex ring is convexly provided with a compressing block 5111 embedded in the closed-loop groove; when the pipe fitting device is applied, the screwing convex ring 511 is screwed towards the direction of the mounting block 6, the compression block 5111 is driven to move leftwards, and the compression block 5111 presses the fitting block 51 leftwards at the moment, so that the fitting block 51 is clamped between the right screwing block 62 and the compression block 5111, the right pipe body 5 is mounted more firmly, and meanwhile, the pipe fitting device is convenient to mount.

The form of the present utility model is not limited to the illustrations and examples, and any person who performs a similar idea of the present utility model should be regarded as not departing from the scope of the patent of the utility model.

Claims

1. A butterfly valve with check valve, have valve block, valve plate and valve seat, valve block and valve seat are the hollow structure that both ends open, the valve seat is located on valve block, the valve plate cooperates with valve seat seal, there are seal rings mounted with valve plate seal on the valve seat; the method is characterized in that: the water flow direction of the valve body is used as the left direction and the right direction, the water outlet communicated with the hollow cavity of the valve body is formed in the bottom surface of the valve body, the sealing plug for sealing the water outlet is detachably mounted on the valve body, the valve body is provided with a left pipe body and a right pipe body, the right end of the valve seat is detachably mounted with the right pipe body through a mounting block, the mounting block and the sealing ring are provided with limiting structures for avoiding the displacement of the sealing ring, the left pipe body is provided with a mounting section and a sealing section at the left side of the mounting section, the left end of the valve seat is detachably mounted with the right end of the mounting section, the bottom surface of the mounting section is provided with the water outlet, the mounting section is internally provided with a check valve, the check valve is provided with a first mounting block, a moving block and a second mounting block, the second mounting block is positioned at the right side of the first mounting block, the first mounting block is positioned in the sealing section range, the first mounting block is positioned at the left side of the outer side of the moving block and is in sealing fit with the sealing section, the moving block is provided with a left sealing part and a right rod part, the left sealing part is in sealing fit with the first mounting block, the right rod part movably passes through the second mounting block, and the right rod part is movably arranged between the left mounting block and the left tensioning part and the second tensioning part is provided with the spring.

2. A butterfly valve with a check valve according to claim 1, wherein: the sealing plug is provided with a screwing section and a sealing installation section, the screwing section is screwed in the water outlet, and the sealing installation section is closely matched with the outer side wall of the installation section.

3. A butterfly valve with a check valve according to claim 1, wherein: the valve seat is a hollow pipe body structure which is left and right open, a closed-loop spiral-in groove which is communicated with the hollow space of the valve seat is concavely arranged left on the right end face of the valve seat, the installation block is of a closed-loop pipe body structure, a left side face of the installation block is convexly provided with a left spiral-in block which can extend into the closed-loop spiral-in groove and is in spiral-in connection with the groove wall of the closed-loop spiral-in groove in a left protruding mode, the sealing ring is attached to the inner side wall of the valve seat, a closed-loop convex strip which extends into the groove bottom of the closed-loop spiral-in groove and the spiral-in block is convexly arranged on the outer side wall of the right end of the sealing ring, and the closed-loop convex strip and the left spiral-in block form the limiting structure.

4. A butterfly valve with a check valve according to claim 1, wherein: the valve seat is vertically provided with a valve rod for controlling the valve plate, the upper end of the valve rod extends out of the valve seat, the top surface of the valve seat is provided with a limiting column in an upward protruding mode, the limiting column is of a hollow structure, the upper end of the valve rod extends out of the limiting column, the outer side wall of the valve rod is sleeved with an O-shaped ring in sealing fit with the limiting column, the O-shaped ring is located at the lower end of the limiting column, the upper end of the limiting column is internally provided with a plug, the lower end of the plug is screwed into the upper end of the limiting column, the upper end of the plug abuts against the top surface of the limiting column, the plug is sleeved out of the upper end of the valve rod, the lower end of the valve rod extends into the valve seat to be connected with the valve plate and extends out of the valve seat downwards, and the bottom surface of the valve seat is provided with an extending block for extending into the lower end of the valve rod.

5. A butterfly valve with a check valve according to claim 1, wherein: the installation piece is protruding right spiral shell and closes the piece right, and right spiral shell closes the piece and is closed loop structure, and right spiral shell closes the internal diameter of piece and the internal diameter of installation piece unanimous, right spiral shell closes the external diameter of piece and is less than the external diameter of installation piece, right body is closed loop pipe body structure, right body's left end portion lateral surface be equipped with right spiral shell close fit's right terminal surface seal fit laminating piece, be equipped with the cover on the laminating piece locate right spiral shell and close the piece outside and with right spiral shell and close the spiral shell bulge loop that the piece spiral shell is connected, right spiral shell closes the right terminal surface of piece and presss from both sides tightly between the laminating piece and has the plain washer.

6. A butterfly valve with a check valve according to claim 1, wherein: the left end face of the valve seat protrudes to form a closed-loop convex ring which stretches into the right end of the sealing section, an external thread is arranged on the outer side wall of the closed-loop convex ring, and an internal thread matched with the external thread is arranged on the inner side wall of the right end of the sealing section.

7. A butterfly valve with a check valve according to claim 1, wherein: the second installation piece spiral shell dress is in the installation section, is equipped with the hole that stretches into that supplies right pole portion to stretch into on the second installation piece, is in the water hole that supplies rivers to pass through that stretches into outside the hole on the second installation piece, and left sealing portion is circular plate body structure, and the left surface of left sealing portion is equipped with sealing gasket, the external diameter of installation section is less than the external diameter of sealing section, first installation piece and sealing section integrated into one piece are connected, the internal diameter of first installation piece is less than the internal diameter of installation section, be formed with first step face between the right flank of first installation piece and the installation section, the right flank of first step face is protruding to be equipped with the pressure piece that stacks on sealing gasket to the right.

8. A butterfly valve with a check valve according to claim 1, wherein: the inner diameter of the installation section is smaller than that of the sealing section, a closed-loop protruding block is arranged on the inner side wall of the installation section in a protruding mode, an embedded groove is concavely formed in the left side of the closed-loop protruding block to the right, an extending hole for the right rod portion to extend in is formed in the second installation block, a plurality of water passing columns are convexly arranged on the left side face of the second installation block to the left, water passing ports communicated with the intervals between the water passing columns are formed in the second installation block, the water passing columns are uniformly arranged at intervals in the circumferential direction, the left end of each water passing column is located in the sealing section range, a sealing block is convexly arranged on the left end portion of each water passing column to the center of the right rod portion in the protruding mode, the inner diameter of each sealing block is smaller than that of each water passing column, the inner side wall of each sealing block is in close fit with the outer side wall of each water passing column, the left sealing portion is located between each sealing block, the left end face of the left sealing portion is a convex cambered surface protruding to the left, the right end of the left sealing portion is convexly arranged to the right, and the outer side wall of each sealing block is in contact with the inner side wall of each sealing block.

9. A butterfly valve with a check valve according to claim 8, wherein: the left end face of the sealing section is provided with a screw groove in a right concave mode, the first mounting block is provided with a horizontal straight portion and a vertical portion located on the left side of the horizontal straight portion, the vertical portion is screwed in the screw groove, the horizontal straight portion is screwed with the outer side wall of each water column, a stepped surface is formed between the right side face of the inner end of the vertical portion and the horizontal straight portion, and sealing sheets located among the first mounting block, the water columns and the left sealing portion are closely matched on the stepped surface.

10. A butterfly valve with a check valve according to claim 9, wherein: the left side face of the first installation block is provided with an embedded groove in a concave manner to the right, and the left sides of the first installation block and the sealing section are provided with sealing embedded rings which extend into the embedded groove.