CN113309885B - Check valve convenient to dismouting - Google Patents

Abstract

The application relates to a one-way valve convenient to disassemble and assemble, and relates to the field of one-way valves. The application has the effect of facilitating the disassembly and assembly of the main body and the sub-body.

Description

Check valve convenient to dismouting

Technical Field

The application relates to the field of one-way valves, in particular to a one-way valve convenient to assemble and disassemble.

Background

The one-way valve is a one-way valve which is characterized in that medium can only flow along the water inlet, but the medium at the water outlet can not flow back, and the one-way valve is also called a check valve or a check valve. The one-way valve is mainly used for preventing medium from flowing in the direction of a hydraulic system, has a straight-through type and a right-angle type, is simple in structure and low in production cost, can meet the use requirement of medium one-way flow of most of the hydraulic systems, and is wide in application range.

A related art, such as chinese patent publication No. CN103764992B, discloses a one-way valve having: a housing forming a positive pressure valve seat; a positive pressure valve that is preloaded by a positive pressure valve spring and forms a negative pressure valve seat; and a negative pressure valve assembled to the positive pressure valve and preloaded by a spring for the negative pressure valve, the positive pressure valve having: an inner cylinder; an outer tube connected to the outer periphery of the inner tube via a rib; and a passage formed between the inner tube and the outer tube, the positive pressure valve spring being disposed between the inner circumference of the sleeve and the outer circumference of the outer tube, one end of the passage being supported by the housing, the other end being supported by the outer tube, the negative pressure valve spring being disposed in the inner tube.

For another example, chinese patent publication No. CN101843436B discloses a check valve of a pressure cooker, which is installed at the top of the inner jacket of a pressure cooker with a jacket, and welded to the inner wall of the jacket; the check valve consists of a valve body bolt, a valve body, a spring and a steel ball, wherein the bolt is connected with the valve body through threads, an exhaust hole is arranged above the center of the bolt and is communicated with a small round hole on a corresponding position of the jacket, an air inlet is arranged below the valve body and is covered by the steel ball, and the spring is pressed against the upper surface of the air inlet. When the air pressure at the air inlet reaches the rated value, the steel ball is jacked, and the air in the jacket is discharged out of the pot body from the air outlet.

With respect to the related art mentioned above, the present inventors considered that the check valve mainly includes a valve seat (i.e., a housing in the related document 1, a housing in the related document 2) and a flow guiding assembly (i.e., an assembly disposed in the housing for realizing unidirectional flow of a medium), and the valve seat mainly includes a main body (i.e., a sub-housing in the related document 1, a valve body of the related document 2) and a sub-body (i.e., a housing main body in the related document 1, a valve body bolt of the related document 2), wherein the main body and the sub-body are generally connected together by means of a clamping connection and a threaded connection, and because a sealing structure is required between the main body and the sub-body to ensure tightness, it is difficult to disassemble the main body and the sub-body (the sealing structure disposed between the main body and the sub-body may cause an obstruction to separation work of the main body and the sub-body), so improvement is required.

Disclosure of Invention

In order to solve the problem that the main body and the sub-body are difficult to assemble and disassemble in the related art, the application provides the one-way valve convenient to assemble and disassemble.

The application provides a check valve convenient to assemble and disassemble, which adopts the following technical scheme.

The utility model provides a check valve convenient to dismouting, includes disk seat and water conservancy diversion subassembly, and the water conservancy diversion subassembly sets up in the disk seat in order to be used for restricting the medium unidirectional flow in the disk seat, the disk seat includes main part, daughter and sets up the seal structure between main part and daughter, be provided with the water inlet in the main part, be provided with the delivery port on the daughter, still include:

the first connecting ring is arranged on one end of the main body close to the sub body, and the first connecting ring is arranged on the outer wall of the main body;

the second connecting ring is arranged at one end of the sub-body close to the main body, and the second connecting ring is arranged on the outer wall of the sub-body;

the limiting ring comprises a first half ring body and a second half ring body, a first limiting groove is formed in the inner concave surface of the first half ring body, a second limiting groove is formed in the inner concave surface of the second half ring body, the first limiting groove and the second limiting groove can be combined to form an annular limiting groove with end-to-end connection, and one end of the first half ring body is rotationally connected with one end of the second half ring body;

one end of the limiting rod is rotationally connected with one end of the first half ring body far away from the second half ring body, and the other end of the limiting rod is detachably clamped with one end of the second half ring body far away from the first half ring body;

when the main body and the sub-body are assembled together, the first connecting ring and the second connecting ring are attached together, and the first connecting ring and the second connecting ring are covered by the annular limiting groove.

Through adopting above-mentioned technical scheme, utilize disk seat and water conservancy diversion subassembly can make up and form complete check valve, utilize main part, sub-body and seal structure can constitute and form inside cavity and the disk seat that both ends have water inlet and delivery port respectively, when needs are in the same place main part and sub-body assembly, only need dock main part and sub-body together, then laminate first go-between and second go-between, then utilize the spacing ring cladding that is formed by first semi-ring body and second semi-ring body combination to tie first go-between and second go-between, at this moment, the effect of blocking the first go-between and the second go-between that laminating together can be reached to the annular spacing groove that has first spacing groove and second spacing groove combination to the utilization, wherein, utilize the cooperation between gag lever post and first semi-ring body and the second semi-ring body, can reach the effect of head end connection with first semi-ring body and second semi-ring body.

Optionally, the stop lever includes:

one end of the connecting rod is rotationally connected with the first half ring body;

the sleeve is sleeved on one end, far away from the first half ring body, of the connecting rod, and the sleeve is in threaded connection with the connecting rod;

the U-shaped groove is communicated with one end of the bump, which is far away from the center of the limiting ring, and the U-shaped groove arranged on the first half ring body is rotationally connected with the connecting rod, and the U-shaped groove arranged on the second half ring body is abutted with one end face of the sleeve, which is close to the first half ring body.

Through adopting above-mentioned technical scheme, when first semi-ring body and second semi-ring body head and tail end meet, through keeping away from the one end rotation of first semi-ring body to setting up the U type inslot at the second semi-ring body with the connecting rod, then through rotating the sleeve so that the sleeve can support tightly with the lug that sets up on the second semi-ring body, can reach the effect with first semi-ring body and the first tail end connection of second semi-ring body.

Optionally, the stop lever further includes:

the butterfly plate, the butterfly plate is provided with two, two the butterfly plate all sets up on telescopic outer wall, and two the butterfly plate all sets up on the one end that first semi-annular body was kept away from to the sleeve, two the butterfly plate uses telescopic axis to mirror image each other to set up as the central line.

Through adopting above-mentioned technical scheme, utilize the tab can form the bulge at telescopic surface, the staff of being convenient for rotates the smooth sleeve in surface.

Optionally, the method further comprises:

the bidirectional internal thread is arranged on the inner wall of the annular limiting groove, the center of the limiting ring is used as a demarcation point, and the spiral directions of the two sides are opposite;

the external threads are arranged on the outer walls of the first connecting ring and the second connecting ring respectively;

the first connecting ring and the second connecting ring are in threaded connection with the limiting ring through matching between the external threads and the bidirectional internal threads.

Through adopting above-mentioned technical scheme, utilize the cooperation between external screw thread and the two-way internal screw thread for the staff can adjust the interval between main part and the daughter through rotating the spacing ring, when the interval between main part and the daughter changes, the pressure that the water conservancy diversion subassembly is used for shutoff water inlet can change thereupon, makes when hydraulic system goes out water end pressure too big, and the medium of play water end is more towards opening the water conservancy diversion subassembly in order to carry out the pressure release against the current.

Optionally, the method further comprises:

the first rubber buffer ring is arranged on one side surface of the first connecting ring, which is away from the second connecting ring, and when the first connecting ring is connected with the limiting ring, the first rubber buffer ring is abutted with the inner wall of the annular limiting groove;

the second rubber buffer ring is arranged on one side surface of the second connecting ring, deviating from the first connecting ring, and when the second connecting ring is connected with the limiting ring, the second rubber buffer ring is abutted with the inner wall of the annular limiting groove.

Through adopting above-mentioned technical scheme, utilize the cooperation between first rubber buffer ring and first go-between and the spacing ring for be connected between first go-between and the spacing ring inseparabler, stable, avoid first go-between to loosen because the influence of vibration and the rotation, utilize the second rubber buffer ring can play the same technological effect to the second go-between.

Optionally, the sealing structure includes:

the rubber body is annularly arranged, the rubber body is arranged between the main body and the sub-body, the inner diameter of the rubber body is identical to the inner diameters of the main body and the sub-body, and the outer diameter of the rubber body is identical to the outer diameters of the first connecting ring and the second connecting ring;

the rubber convex edges are arranged in two ways, the two rubber convex edges are respectively arranged on two side surfaces of the rubber body, and the rubber body and the rubber convex edges are coaxially arranged;

the rubber convex edges are embedded in the two limiting grooves respectively.

Through adopting above-mentioned technical scheme, utilize the rubber body can ensure the area of contact between seal structure and main part and the daughter, utilize the cooperation between rubber protruding edge and the spacing recess can ensure the joint strength between seal structure and main part and the daughter.

Optionally, the sealing structure further includes:

the annular inner cavities are provided with a plurality of channels, each annular inner cavity is arranged in the rubber body, each annular inner cavity is annularly arranged, and the axis of each annular inner cavity is coincident with the axis of the rubber body.

Through adopting above-mentioned technical scheme, utilize annular inner chamber can improve the deflection of rubber body for when the interval between main part and the daughter changes, the actual thickness of rubber body can change thereupon, ensures the contact effect between rubber body and main part and the daughter.

Optionally, the flow guiding assembly includes:

the mounting ring is provided with a plurality of water through holes, the outer wall of the mounting ring is connected with the inner wall of the valve seat, and the mounting ring is also provided with jacks coaxially arranged with the mounting ring;

the valve rod penetrates through the mounting ring through the insertion hole, a plug used for being matched with the water inlet is arranged at one end of the valve rod extending into the main body, the outer diameter of the plug is larger than that of the valve rod, and the outer diameter of the plug is larger than the inner diameter of the water inlet;

the reset spring is sleeved on the valve rod, and two ends of the reset spring are respectively abutted with the plug and the mounting ring.

Through adopting above-mentioned technical scheme, utilize the collar to ensure the connection effect between water conservancy diversion subassembly and the disk seat, utilize the end cap that sets up on the valve rod can ensure the closure to the water inlet, utilize reset spring can ensure the degree and search for the contact effect between the water inlet.

Optionally, the flow guiding assembly further comprises:

the rubber sealing ring is sleeved on the outer wall of the plug, and when the plug is matched with the water inlet, the outer wall of the rubber sealing ring is tightly attached to the inner wall of the water inlet;

the plug is arranged in a circular plate shape, an annular mounting groove is formed in the outer wall of the plug, and the rubber sealing ring is mounted on the annular mounting groove.

Through adopting above-mentioned technical scheme, utilize rubber seal can ensure the sealing connection effect between end cap and the water inlet, utilize annular mounting groove can ensure the joint strength between rubber seal and the end cap.

Optionally, the valve seat is internally provided with:

the first annular groove is arranged on the inner wall of the main body and is communicated with the end face of the main body, which is close to the sub body;

the second annular groove is arranged on the inner wall of the sub body and is communicated with the end face of the sub body close to the main body;

wherein, when the water conservancy diversion subassembly is installed in the disk seat, the collar is located in first ring channel and second ring channel.

Through adopting above-mentioned technical scheme, utilize first ring channel and second ring channel can play the effect of restriction collar mounted position, ensure that the collar can be stable install in the disk seat.

In summary, the present application includes at least one of the following beneficial technical effects:

the main body and the sub body forming the valve seat are convenient to disassemble and assemble, so that the effects of convenient one-way valve assembly production and disassembly and overhaul are achieved;

the check pressure can be adjusted according to actual needs, so that the check valve can adjust the pressure release capacity to a certain extent, and the application range is wider;

the double-seal device has double-seal capability, better sealing effect and safer use.

Drawings

FIG. 1 is a front view of a one-way valve according to an embodiment of the present application;

FIG. 2 is a schematic cross-sectional view of a check valve according to an embodiment of the present application;

FIG. 3 is an exploded schematic view of a check valve according to an embodiment of the present application;

FIG. 4 is a schematic illustration of the connection between the body and the sub-body of an embodiment of the present application;

FIG. 5 is an enlarged schematic view of part A in FIG. 2;

FIG. 6 is a front view of a stop collar according to an embodiment of the present application;

FIG. 7 is a schematic view of a flow directing assembly according to an embodiment of the present application;

fig. 8 is a partially enlarged schematic view of B in fig. 7.

Reference numerals: 1. a valve seat; 11. a main body; 111. a first connection ring; 112. an external thread; 113. a first rubber buffer ring; 114. a limit groove; 115. a first water inlet channel; 116. a second water inlet channel; 117. a third water inlet channel; 118. a first annular groove; 12. a sub-body; 121. a second connecting ring; 122. a second rubber buffer ring; 123. a second annular groove; 13. a sealing structure; 131. a rubber body; 132. rubber protruding edges; 133. an annular inner cavity; 14. a limiting ring; 141. an annular limit groove; 142. a bi-directional internal thread; 143. a first half-ring body; 1431. a first limit groove; 144. a second half-ring; 1441. the second limit groove; 145. a bump; 1451. a U-shaped groove; 15. a limit rod; 151. a connecting rod; 152. a sleeve; 153. a butterfly piece; 2. a flow guiding assembly; 21. a mounting ring; 211. a guide sleeve; 212. a jack; 213. a water through hole; 22. a valve stem; 221. a plug; 2211. a first circular plate portion; 2212. a second circular plate portion; 2213. a third disk portion; 2214. an annular mounting groove; 23. a return spring; 24. a rubber seal ring; 241. a circular cutting part; .

Detailed Description

The application is described in further detail below with reference to fig. 1-8.

The embodiment of the application discloses a check valve convenient to disassemble and assemble. Referring to fig. 1 and 2, the check valve includes a valve seat 1 for providing an effect of circulating a medium in a hydraulic system, and a flow guide assembly 2 for guiding the medium in the valve seat 1 to circulate unidirectionally.

Referring to fig. 2 and 3, the valve seat 1 includes a main body 11, a sub-body 12, a sealing structure 13, a limit ring 14 and a limit rod 15, wherein the main body 11 and the sub-body 12 are matched with each other to form a hollow shell, two ends of the shell are respectively provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively arranged at one end of the main body 11 and the sub-body 12 opposite to each other, the sealing structure 13 is arranged between the main body 11 and the sub-body 12 and is used for sealing and connecting the main body 11 and the sub-body 12, and the limit ring 14 and the limit rod 15 are matched with each other and are used for fixedly connecting the main body 11 and the sub-body 12 together; wherein the baffle assembly 2 is mounted within a housing formed by the combination of the main body 11 and the sub-body 12.

Referring to fig. 4, a first connection ring 111 and a second connection ring 121 are respectively provided at one end where the main body 11 and the sub-body 12 meet, the first connection ring 111 and the second connection ring 121 are respectively provided on outer walls of the main body 11 and the sub-body 12, and when the main body 11 and the sub-body 12 are butted, opposite side surfaces of the first connection ring 111 and the second connection ring 121 are matched with each other; wherein, all be provided with external screw thread 112 on the outer wall of first go-between 111 and second go-between 121, be provided with annular spacing groove 141 on the inner wall of spacing ring 14, be provided with the both ends respectively with the two external screw thread 112 complex two-way internal screw thread 142 in the annular spacing groove 141, the both ends screw thread spiral direction of two-way internal screw thread 142 sets up in opposite directions, when spacing ring 14 rotates, utilize the cooperation between two-way internal screw thread 142 and the external screw thread 112, can drive first go-between 111 and second go-between 121 and do opposite direction and remove.

Referring to fig. 3 and 5, a first rubber buffer ring 113 and a second rubber buffer ring 122 are respectively provided on one side surface of the first connection ring 111 and the second connection ring 121 facing away from each other, the axes of the first rubber buffer ring 113 and the second rubber buffer ring 122 are arranged to coincide with the axis of the valve seat 1, and when the first connection ring 111 and the second connection ring 121 are engaged with the stopper ring 14, the first rubber buffer ring 113 and the second rubber buffer ring 122 are both tightly engaged with the inner wall of the stopper ring 14.

Referring to fig. 6, the stop collar 14 includes a first half collar 143 and a second half collar 144, one end of the first half collar 143 is rotationally connected with one end of the second half collar 144, and axes of a rotation shaft for rotationally connecting the first half collar 143 and the second half collar 144 are parallel to axes of the stop collar 14, the other ends of the first half collar 143 and the second half collar 144 are both provided with protrusions 145, and the two protrusions 145 are both provided on an outer wall of the stop collar 14; one end of the limiting rod 15 is rotatably connected with a bump 145 disposed on the first half ring body 143, and the other end of the limiting rod 15 is detachably connected with a bump 145 disposed on the second half ring body 144.

Wherein, a first limiting groove 1431 and a second limiting groove 1441 are respectively provided on the inner concave surfaces of the first half ring body 143 and the second half ring body 144, and when the head and the tail ends of the first half ring body 143 and the second half ring body 144 are connected together to form the closed limiting ring 14, the first limiting groove 1431 and the second limiting groove 1441 are communicated to form the complete annular limiting groove 141.

Referring to fig. 6, the limiting rod 15 includes a connecting rod 151, a sleeve 152 and a tab 153, the connecting rod 151 is rotationally connected with a bump 145 disposed on the first half ring 143, the sleeve 152 is sleeved on one end of the connecting rod 151 far away from the first half ring 143, the sleeve 152 and the connecting rod 151 are in threaded connection, the tabs 153 are symmetrically disposed with two tabs, and the two tabs 153 are disposed on one end of the sleeve 152 far away from the first half ring 143, and the two tabs 153 are symmetrically disposed with the axis of the sleeve 152 as the center line.

Wherein, the two protruding blocks 145 are provided with U-shaped grooves 1451, the U-shaped grooves 1451 are communicated with one side surface of the protruding block 145 far away from the center of the limit ring 14, and the other two opposite side surfaces of the U-shaped grooves 1451 and the protruding block 145 are communicated, one end of the connecting rod 151 extends into the U-shaped groove 1451 of the protruding block 145 arranged on the first half ring body 143, the connecting rod 151 and the protruding block 145 are rotationally connected by a pin shaft, the axes of the pins for realizing the rotational connection between the connecting rod 151 and the protruding block 145 are parallel to the axes of the limit ring 14, and when the limit rod 15 is matched with the second half ring body 144, one end of the connecting rod 151 far away from the first half ring body 143 extends into the U-shaped groove 1451 of the protruding block 145 arranged on the second half ring body 144.

When the first connecting ring 111 and the second connecting ring 121 need to be fixed together by using the limiting ring 14, the limiting ring 14 with the ends connected at the head and the tail is sleeved on the first connecting ring 111 and the second connecting ring 121, then one end of the connecting rod 151 far away from the first half ring body 143 is rotated into the U-shaped groove 1451 positioned on the second half ring body 144, and then the sleeve 152 is rotated by using the butterfly plate 153, so that one end face of the sleeve 152 close to the first half ring body 143 abuts against one side face of the bump 145 far away from the first half ring body 143.

Referring to fig. 3 and 5, the sealing structure 13 includes a rubber body 131 and a rubber flange 132, the rubber body 131 is disposed between the main body 11 and the sub-body 12, the inner diameter of the rubber body 131 is the same as the inner diameters of the main body 11 and the sub-body 12, the outer diameter of the rubber body 131 is the same as the outer diameters of the first connection ring 111 and the second connection ring 121, the rubber flange 132 is provided with two rubber flanges 132, and the two rubber flanges 132 are respectively disposed on both sides of the rubber body 131; wherein, a limiting groove 114 is disposed on a side surface of the first connecting ring 111 and the second connecting ring 121 opposite to each other, and when the sealing structure 13 is installed between the main body 11 and the sub-body 12, two rubber protruding edges 132 are respectively embedded in the two limiting grooves 114.

The rubber body 131 is further provided with a plurality of annular inner cavities 133 annularly arranged, and the axis of each annular inner cavity 133 is overlapped with the axis of the rubber body 131.

Referring to fig. 7, the flow guiding assembly 2 includes a mounting ring 21, a valve rod 22, a return spring 23 and a rubber seal 24, the mounting ring 21 is mounted in the housing, the axis of the mounting ring 21 is overlapped with the axis of the housing, the valve rod 22 provided with a plurality of rings on the mounting ring 21 and overlapped with the axis of the mounting ring 21 passes through the mounting ring 21, the axis of the valve rod 22 is overlapped with the axis of the mounting ring 21, a plug 221 matched with the water inlet is provided at one end of the valve rod 22, the return spring 23 is sleeved on the valve rod 22, two ends of the return spring 23 are respectively abutted with the mounting ring 21 and the plug 221, the cooperation between the plug 221 and the water inlet can be ensured by utilizing the return spring 23, the rubber seal 24 is sleeved on the outer wall of the plug 221, and the rubber seal 24 is used for ensuring the sealing connection between the plug 221 and the water inlet.

Wherein, the installing ring 21 is also provided with a jack 212 coaxially arranged with the installing ring 21, the installing ring 21 is also provided with a guide sleeve 211 coaxially arranged with the jack 212, one end of the valve rod 22 far away from the plug 221 is inserted into the guide sleeve 211, and the installing ring 21 is also provided with a plurality of water through holes 213 circumferentially equidistantly distributed around the axis of the jack 212.

Referring to fig. 7 and 8, the cavity in the main body 11 is sequentially divided into a first water inlet channel 115, a second water inlet channel 116 and a third water inlet channel 117 along the axial direction, the first water inlet channel 115 is cylindrically arranged, the second water inlet channel 116 is cylindrically arranged in a circular table shape, the third water inlet channel 117 is cylindrically arranged, the third water inlet channel 117 is used as a water inlet, one end of the second water inlet channel 116 with smaller area is communicated with the first water inlet channel 115, and one end of the second water inlet channel 116 with larger area is communicated with the first water inlet channel 115; the plug 221 is configured in a disc shape, the plug 221 is divided into a first disc portion 2211, a second disc portion 2212 and a third disc portion 2213 along the axis direction, the outer diameter of the first disc portion 2211 is slightly larger than the inner diameter of the water inlet, the outer diameter of the second disc portion 2212 is slightly smaller than the outer diameter of the third disc portion 2213, the outer diameter of the third disc portion 2213 is slightly smaller than the inner diameter of the water inlet, the first disc portion 2211, the second disc portion 2212 and the third disc portion 2213 can be matched and combined to form an annular mounting groove 2214 arranged on the outer wall of the plug 221, and the rubber sealing ring 24 is mounted in the annular mounting groove 2214.

Wherein, be provided with the circular cutting portion 241 on the outer wall of rubber seal 24, utilize circular cutting portion 241 to make the outside cross-section of rubber seal 24 personally submit the round platform form setting, when end cap 221 and water inlet cooperation, the circular cutting portion 241 cooperates with the juncture of second inlet channel 116 and third inlet channel 117.

Referring to fig. 6, a first annular groove 118 and a second annular groove 123 are respectively provided on the inner wall of the main body 11 and the inner wall of the sub body 12, one side of the first annular groove 118 and the second annular groove 123, which are arranged opposite, are respectively communicated with one side of the main body 11 and the sub body 12, and when the flow guiding assembly 2 is installed in the housing, the installation ring 21 is clamped in the second annular groove 123; wherein, when the first connection ring 111 and the second connection ring 121 are completely attached, both side surfaces of the mounting ring 21 are attached to the first annular groove 118 and the second annular groove 123, respectively.

The embodiment of the application provides a one-way valve convenient to disassemble and assemble, which is implemented by the following principle:

when the check valve needs to be assembled, the diversion assembly 2 is only required to be installed in a shell formed by combining the main body 11, the sub-body 12 and the sealing structure 13, and then the tightly matched first connecting ring 111 and second connecting ring 121 are covered together by utilizing the matching between the limiting ring 14 and the limiting rod 15.

When the pressure of the return spring 23 to the plug 221 needs to be adjusted, only the limiting ring 14 needs to be rotated according to actual needs, and the spacing between the main body 11 and the sub-body 12 changes when the limiting ring 14 rotates, so that the spacing between the water inlet and the mounting ring 21 also changes, and when the spacing between the water inlet and the mounting ring 21 changes, the elastic force of the return spring 23 to the plug 221 also changes.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims (8)

1. The utility model provides a check valve convenient to dismouting, includes disk seat (1) and water conservancy diversion subassembly (2), and water conservancy diversion subassembly (2) set up in disk seat (1) in order to be used for restricting the medium unidirectional flow in disk seat (1), disk seat (1) include main part (11), sub-body (12) and set up seal structure (13) between main part (11) and sub-body (12), be provided with the water inlet in main part (11), be provided with the delivery port on sub-body (12), its characterized in that still includes:

a first connecting ring (111), wherein the first connecting ring (111) is arranged on one end of the main body (11) close to the sub body (12), and the first connecting ring (111) is arranged on the outer wall of the main body (11);

a second connecting ring (121), wherein the second connecting ring (121) is arranged on one end of the sub-body (12) close to the main body (11), and the second connecting ring (121) is arranged on the outer wall of the sub-body (12);

the limiting ring (14), the limiting ring (14) comprises a first half ring body (143) and a second half ring body (144), a first limiting groove (1431) is formed in the inner concave surface of the first half ring body (143), a second limiting groove (1441) is formed in the inner concave surface of the second half ring body (144), the first limiting groove (1431) and the second limiting groove (1441) can be combined to form an annular limiting groove (141) with the head end and the tail end connected, and one end of the first half ring body (143) is rotationally connected with one end of the second half ring body (144);

one end of the limiting rod (15) is rotationally connected with one end, far away from the second half ring body (144), of the first half ring body (143), and the other end of the limiting rod (15) is detachably clamped with one end, far away from the first half ring body (143), of the second half ring body (144);

when the main body (11) and the sub body (12) are assembled together, the first connecting ring (111) and the second connecting ring (121) are attached together, and the first connecting ring (111) and the second connecting ring (121) are covered by the annular limiting groove (141);

further comprises:

the bidirectional internal thread (142) is arranged on the inner wall of the annular limiting groove (141), the bidirectional internal thread (142) takes the center of a limiting ring (14) as a demarcation point, and the spiral directions of the two sides are opposite;

the external threads (112) are arranged at two times, and the two external threads (112) are respectively arranged on the outer walls of the first connecting ring (111) and the second connecting ring (121);

the first connecting ring (111) and the second connecting ring (121) are in threaded connection with the limiting ring (14) through matching between the external threads (112) and the bidirectional internal threads (142);

further comprises:

the first rubber buffer ring (113) is arranged on one side surface of the first connecting ring (111) deviating from the second connecting ring (121), and when the first connecting ring (111) is connected with the limiting ring (14), the first rubber buffer ring (113) is abutted against the inner wall of the annular limiting groove (141);

the second rubber buffer ring (122), second rubber buffer ring (122) sets up on one side that second go-between (121) deviate from first go-between (111), and when second go-between (121) are connected with spacing ring (14), second rubber buffer ring (122) and annular spacing groove (141) inner wall butt.

2. A check valve for facilitating disassembly and assembly according to claim 1, wherein the stop lever (15) comprises:

one end of the connecting rod (151) is rotationally connected with the first half ring body (143);

the sleeve (152) is sleeved on one end, far away from the first half ring body (143), of the connecting rod (151), and the sleeve (152) is in threaded connection with the connecting rod (151);

the U-shaped groove (1451) is communicated with one end of the lug (145) far away from the center of the limiting ring (14), the U-shaped groove (1451) arranged on the first half ring body (143) is rotationally connected with the connecting rod (151), and the U-shaped groove (1451) arranged on the second half ring body (144) is abutted to one end face of the sleeve (152) close to the first half ring body (143).

3. A check valve for facilitating disassembly and assembly according to claim 2, wherein the stop lever (15) further comprises:

the butterfly sheet (153), butterfly sheet (153) are provided with two, two butterfly sheet (153) all set up on the outer wall of sleeve (152), and two butterfly sheet (153) all set up on sleeve (152) keep away from the one end of first semi-ring body (143), two butterfly sheet (153) use the axis of sleeve (152) to mirror image each other and set up as the central line.

4. A check valve for facilitating disassembly and assembly according to claim 1, wherein the sealing structure (13) comprises:

the rubber body (131) is annularly arranged, the rubber body (131) is arranged between the main body (11) and the sub body (12), the inner diameter of the rubber body (131) is the same as the inner diameters of the main body (11) and the sub body (12), and the outer diameter of the rubber body (131) is the same as the outer diameters of the first connecting ring (111) and the second connecting ring (121);

the rubber convex edges (132), wherein the rubber convex edges (132) are provided with two paths, the two rubber convex edges (132) are respectively arranged on two side surfaces of the rubber body (131), and the rubber body (131) and the rubber convex edges (132) are coaxially arranged;

wherein, a side surface of the first connecting ring (111) and a side surface of the second connecting ring (121) which are arranged in opposite directions are respectively provided with a limiting groove (114) which is arranged in a ring shape, and two rubber convex edges (132) are respectively embedded in the two limiting grooves (114).

5. A non-return valve according to claim 4, wherein the sealing structure (13) further comprises:

the annular inner cavities (133), the annular inner cavities (133) are provided with a plurality of channels, each annular inner cavity (133) is arranged in the rubber body (131), each annular inner cavity (133) is annularly arranged, and the axis of each annular inner cavity (133) coincides with the axis of the rubber body (131).

6. A non-return valve according to claim 1, wherein the flow guide assembly (2) comprises:

the mounting ring (21), a plurality of water through holes (213) are formed in the mounting ring (21), the outer wall of the mounting ring (21) is connected with the inner wall of the valve seat (1), and the mounting ring (21) is also provided with a jack (212) coaxially arranged with the mounting ring (21);

the valve rod (22) penetrates through the mounting ring (21) through the insertion hole (212), a plug (221) used for being matched with the water inlet is arranged at one end of the valve rod (22) extending into the main body (11), the outer diameter of the plug (221) is larger than that of the valve rod (22), and the outer diameter of the plug (221) is larger than the inner diameter of the water inlet;

the return spring (23) is sleeved on the valve rod (22), and two ends of the return spring (23) are respectively abutted with the plug (221) and the mounting ring (21).

7. A non-return valve according to claim 6, wherein the flow guide assembly (2) further comprises:

the rubber sealing ring (24) is sleeved on the outer wall of the plug (221), and when the plug (221) is matched with the water inlet, the outer wall of the rubber sealing ring (24) is tightly attached to the inner wall of the water inlet;

the plug (221) is arranged in a circular plate shape, an annular mounting groove (2214) is formed in the outer wall of the plug (221), and the rubber sealing ring (24) is mounted on the annular mounting groove (2214).

8. A check valve convenient to disassemble and assemble according to claim 6, characterized in that the valve seat (1) is internally provided with:

the first annular groove (118) is arranged on the inner wall of the main body (11), and the first annular groove (118) is communicated with the end face, close to the sub body (12), of the main body (11);

the second annular groove (123) is arranged on the inner wall of the sub-body (12), and the second annular groove (123) is communicated with the end face, close to the main body (11), of the sub-body (12);

wherein, when the diversion assembly (2) is installed in the valve seat (1), the installation ring (21) is positioned in the first annular groove (118) and the second annular groove (123).