One-way valve and valve set device

Abstract

A one-way valve and a valve set device. The one-way valve comprises a guide tube (10), a sealing ring (20), a valve core (30), and a stop member (40), wherein two ends of the guide tube (10) each are welded to a communicating tube made of cast iron or steel; the sealing ring (20) is arranged in the guide tube (10), and the sealing ring (20) is provided with a valve port (21); the valve core (30) is movably arranged in the guide tube (10) so as to open / close the valve port (21); the stop member (40) is arranged in the guide tube (10) and is arranged on the side of the valve core (30) facing away from the sealing ring (20), and the stop member (40) is used for stopping the valve core (30); the guide tube (10), the sealing ring (20), the valve core (30), and the stop member (40) are all made of cast iron or steel, or one or more of the guide tube (10), the sealing ring (20), the valve core (30), and the stop member (40) are made of cast iron, and the others are made of steel. The valve core of the one-way valve is movably arranged in the guide tube, the stop member stops the valve core to prevent the valve core from falling out of the guide tube, and the guide tube and the communicating tubes are both made of cast iron or steel, so that the communicating tubes and the guide tube can be directly connected by welding, thereby providing a more convenient and efficient connection and solving the problem in the prior art of complex connections between guide tubes of one-way valves and communicating tubes.

Description

One-way valve and valve group device

[0001] The present application claims priority to the patent application No. 202422221425.7 filed on September 10, 2024, with the China National Intellectual Property Office and titled "One-way valve and valve group device";

[0002] The present application claims priority to the patent application No. 202422232747.1 filed on September 10, 2024, with the China National Intellectual Property Office and titled "One-way valve";

[0003] The present application claims priority to the patent application No. 202422219807.6 filed on September 10, 2024, with the China National Intellectual Property Office and titled "One-way valve". TECHNICAL FIELD

[0004] The present application relates to the technical field of one-way valves, in particular to a one-way valve and a valve group device. BACKGROUND

[0005] Some one-way valves in the prior art achieve the purpose of automatic one-way flow of fluid in the one-way valve by the pressure change on both sides of the valve core to block or open the valve port of the one-way valve. The conduits of the one-way valve need to be fixedly connected with the communication pipes. In the prior art, the communication pipe connected with the one-way valve is made of copper, and the conduit of the one-way valve is made of steel. The connection mode of the conduit and the communication pipe is to fix a copper sleeve at both ends of the conduit, and then fix the copper sleeve with the communication pipe. The connection mode of the conduit and the communication pipe is complex and has high cost. At present, the material of some communication pipes is cast iron or steel, and therefore, a conduit capable of being connected with the communication pipe made of cast iron or steel is needed. SUMMARY

[0006] The present application provides a one-way valve and a valve group device to solve the problem that the conduit of the one-way valve in the prior art cannot be applied to the communication pipe made of cast iron or steel.

[0007] In order to solve the above problems, according to one aspect of the present application, a one-way valve is provided, which comprises a conduit, a seal ring, a valve core and a stopper. The seal ring is arranged in the conduit and has a valve port. The valve core is movably arranged in the conduit to open and close the valve port. The stopper is arranged in the conduit and on the side of the valve core away from the seal ring, and is used to stop the valve core. The conduit, the seal ring, the valve core and the stopper are all made of cast iron or steel, or one or more of the conduit, the seal ring, the valve core and the stopper is made of cast iron and the others are made of steel.

[0008] Further, the end face of the outer ring of the sealing ring away from the valve core is annularly laser welded with the inner wall of the guide pipe; and / or, the end face of the outer ring of the stopper away from the valve core is annularly laser welded with the inner wall of the guide pipe.

[0009] Further, the guide pipe comprises a first section, a second section and a third section connected in sequence, the inner diameter of the second section is smaller than the inner diameter of the first section and the third section, a first limiting surface is formed between the first section and the second section, and a second limiting surface is formed between the third section and the second section.

[0010] Further, the stopper is located in the first section, and the stopper abuts against the first limiting surface.

[0011] Further, the sealing ring is located in the second section, and the end face of the sealing ring away from the valve core is flush with the second limiting surface.

[0012] Further, the outer ring of the sealing ring is connected with the inner wall of the guide pipe, the inner ring of the sealing ring has a first annular flow-through surface at one end close to the valve core, the flow-through area of the first annular flow-through surface gradually decreases along the valve closing direction, and the inner side of the sealing ring has a second annular flow-through surface at one end away from the valve core, the flow-through area of the second annular flow-through surface gradually increases along the valve closing direction.

[0013] Further, the cross section of the sealing ring along the axial direction of the one-way valve is a sealing ring cross section, the included angle between the two sides of the first annular flow-through surface in the sealing ring cross section is a first cross section angle, the included angle between the two sides of the second annular flow-through surface in the sealing ring cross section is a second cross section angle, and the first cross section angle ranges from 50° to 100°; and / or, the second cross section angle ranges from 50° to 100°.

[0014] Further, the valve core comprises a valve core body and a guide portion, the guide portion is arranged in the circumferential direction of the valve core body, the valve core body is used for plugging or opening the valve port, and the guide portion is in sliding fit with the inner wall of the guide pipe.

[0015] According to another aspect of the present application, a valve group device is provided, comprising a first communication pipe, a second communication pipe and the above-mentioned one-way valve, the first communication pipe is connected with one end of the guide pipe of the one-way valve close to the stopper, the second communication pipe is connected with one end of the guide pipe close to the sealing ring, and the first communication pipe and the second communication pipe are made of cast iron or steel.

[0016] Further, the first communication pipe is connected with the guide pipe by means of furnace welding, and the second communication pipe is connected with the guide pipe by means of furnace welding.

[0017] The technical scheme is applied to provide a one-way valve, which comprises a conduit, a sealing ring, a valve core and a stopper; the sealing ring is arranged in the conduit and has a valve port; the valve core is movably arranged in the conduit to open and close the valve port; the stopper is arranged in the conduit and on the side of the valve core away from the sealing ring, and is used for stopping the valve core; wherein the conduit, the sealing ring, the valve core and the stopper are made of cast iron or steel material, or one or several of the conduit, the sealing ring, the valve core and the stopper are made of cast iron, and the others are made of steel material. By adopting the scheme, the valve core is movably arranged in the conduit, when the pressure on the side of the valve core close to the sealing ring is less than the pressure on the side of the valve core away from the sealing ring, the valve core blocks the valve port; when the pressure on the side of the valve core close to the sealing ring is greater than the pressure on the side of the valve core away from the sealing ring, the valve core is separated from the sealing ring, and the valve port is opened. The stopper stops the valve core to prevent the valve core from being taken out of the conduit. The conduit and the communication pipe are made of cast iron or steel material, so that the communication pipe and the conduit can be directly welded and connected, which is more convenient and fast. Since the one-way valve is made of cast iron or steel material, when the first communication pipe and the second communication pipe are also made of cast iron or steel material, the first communication pipe and the second communication pipe can be directly fixed and connected through furnace welding, which is beneficial to improve the connection efficiency and reduce the connection cost. Through the scheme, the problem that the conduit of the one-way valve in the prior art cannot be applied to the communication pipe made of cast iron or steel material is solved. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part thereof, serve to provide further understanding of the application, and together with the description of the exemplary embodiments of the application, serve to explain the application, and do not constitute an inappropriate limitation on the application. In the drawings:

[0019] Fig. 1 shows a structure schematic view of a one-way valve when the valve port is opened according to an embodiment of the application;

[0020] Fig. 2 shows a structure schematic view of the one-way valve when the valve port is closed according to the embodiment of the application;

[0021] Fig. 3 shows a partial enlarged view of A in Fig. 2;

[0022] Fig. 4 shows a partial enlarged view of B in Fig. 2;

[0023] Fig. 5 shows a structure schematic view of the valve core in Fig. 1;

[0024] Fig. 6 shows a sectional view of the stopper in Fig. 3;

[0025] Fig. 7 shows a top view of Fig. 5;

[0026] Fig. 8 shows a C-C sectional view of Fig. 7;

[0027] Fig. 9 shows a D-D sectional view of Fig. 7.

[0028] Wherein, the above-mentioned drawings include the following reference signs: 10, conduit; 11, first section; 12, second section; 121, first limiting surface; 122, second limiting surface; 13, third section; 20, sealing ring; 21, valve port; 22, first annular flow-through surface; 221, first cross-sectional angle; 23, second annular flow-through surface; 231, second cross-sectional angle; 30, valve core; 31, valve core body; 311, flow-through section; 312, plugging section; 313, flow guide section; 32, guide structure; 321, sheet structure; 3211, adapter section; 3212, limiting section; 3213, inwardly-retracted section; 3214, flow guide inclined surface; 33, flow-through angle; 34, first flow guide round corner; 35, second flow guide round corner; 36, arc surface; 40, stopper; 41, first conical surface; 42, second conical surface; 43, first limiting portion; 44, second limiting portion; 50, first communication pipe; 60, second communication pipe. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0030] As shown in FIGS. 1-9, the embodiments of the present application provide a one-way valve, which includes a conduit 10, a sealing ring 20, a valve core 30 and a stopper 40, both ends of the conduit 10 are welded with communication pipes made of cast iron or steel; the sealing ring 20 is arranged in the conduit 10, and the sealing ring 20 has a valve port 21; the valve core 30 is movably arranged in the conduit 10 to open and close the valve port 21; the stopper 40 is arranged in the conduit 10 and on the side of the valve core 30 away from the sealing ring 20, and the stopper 40 is used to stop the valve core 30; wherein the conduit 10, the sealing ring 20, the valve core 30 and the stopper 40 are all made of cast iron or steel, or one or several of the conduit 10, the sealing ring 20, the valve core 30 and the stopper 40 are made of cast iron, and the others are made of steel.

[0031] In the embodiment, the valve core 30 is movably arranged in the conduit 10, and the valve core 30 blocks the valve port 21 when the pressure on the side of the valve core 30 close to the sealing ring 20 is less than the pressure on the side of the valve core 30 away from the sealing ring 20, and the valve core 30 is separated from the sealing ring 20 when the pressure on the side of the valve core 30 close to the sealing ring 20 is greater than the pressure on the side of the valve core 30 away from the sealing ring 20, and the valve port 21 is opened. The stopper 40 stops the valve core 30 from being pulled out of the conduit 10. The conduit 10 and the communication pipe are made of cast iron or steel, so that the communication pipe and the conduit can be directly welded and connected, which is more convenient and fast. Through the scheme, the problem of complex connection mode of the conduit 10 and the communication pipe of the one-way valve in the prior art is solved. Since the one-way valve is made of cast iron or steel, when the first communication pipe 50 and the second communication pipe 60 connected to the two ends of the conduit 10 are also made of cast iron or steel, the conduit 10 and the communication pipe can be directly fixed and connected by furnace welding, which is beneficial to improve the connection efficiency and reduce the connection cost.

[0032] In some embodiments, the conduit 10, the sealing ring 20, the valve core 30, the stopper 40 and the communication pipe can be made of carbon steel or stainless steel.

[0033] The end face outer ring of the end of the sealing ring 20 away from the valve core 30 is annularly laser welded with the inner wall of the conduit 10, and / or the end face outer ring of the end of the stopper 40 away from the valve core 30 is annularly laser welded with the inner wall of the conduit 10.

[0034] The outer ring of the sealing ring 20 is tightly fitted with the inner wall of the conduit 10 for laser welding, so that the sealing ring 20 is fixed at one end of the conduit 10, and the outer ring of the stopper 40 is tightly fitted with the inner wall of the conduit 10 for laser welding, so that the stopper 40 is fixed at the other end of the conduit 10.

[0035] As shown in FIGS. 1, 3 and 4, the conduit 10 includes a first segment 11, a second segment 12 and a third segment 13 connected in sequence, the inner diameter of the second segment 12 is smaller than the inner diameters of the first segment 11 and the third segment 13, a first limiting surface 121 is formed between the first segment 11 and the second segment 12, and a second limiting surface 122 is formed between the third segment 13 and the second segment 12. The first communication pipe 50 is connected to the end of the conduit 10 provided with the stopper 40, and the second communication pipe 60 is connected to the end of the conduit 10 provided with the sealing ring 20.

[0036] The first limiting surface 121 is located on the end face of the end of the second segment 12 close to the first segment 11, and the second limiting surface 122 is located on the end face of the end of the second segment 12 close to the third segment 13. The first limiting surface 121 directly or indirectly limits the first communication pipe 50, and the second limiting surface 122 directly or indirectly limits the second communication pipe 60.

[0037] As shown in FIG. 1 and FIG. 3, the stopper 40 is located at the first section 11, and the sealing ring 20 is located at the second section 12. The stopper 40 abuts against the first limiting surface 121.

[0038] It can be understood that the first limiting surface 121 limits the stopper 40, so that the position of the stopper 40 in the conduit 10 is fixed and does not move during use of the one-way valve.

[0039] It can be understood that the first limiting surface 121 limits the stopper 40, and at the same time, limits the first communication pipe 50. In combination with the second limiting surface 122 limiting the second communication pipe 60, the structure of the conduit 10 itself is used to position the first communication pipe 50 and the second communication pipe 60, which is convenient and fast. At the same time, the length of the first communication pipe 50 and the second communication pipe 60 inserted into the conduit 10 is limited, avoiding the situation that the depth of insertion is too long and interferes with the valve core 30 during the process of connecting the first communication pipe 50 and the second communication pipe 60 with the conduit 10, thereby affecting the normal use of the one-way valve.

[0040] In some embodiments, the first limiting surface 121 can also be directly positioned for the first communication pipe 50, and the end surface of the stopper 40 close to the end surface of the first communication pipe 50 is flush with the first limiting surface 121. The sealing ring 20 can be arranged to abut against the second limiting surface 122, and the end surface of the end of the sealing ring 20 away from the valve core 30 abuts against the second communication pipe 60.

[0041] In some embodiments, the first limiting surface 121 and the second limiting surface 122 can be arranged on the inner wall or the outer wall of the conduit 10, and the external communication pipe is inserted into the conduit 10 or is sleeved on the outer periphery of the conduit 10.

[0042] The outer ring of the sealing ring 20 is tightly fitted with the inner wall of the conduit 10 for laser welding. In this way, when welding between the second communication pipe 60 and the conduit 10, the welding material cannot penetrate into the inner wall of the second section 12 through the gap between the sealing ring 20 and the conduit 10, thereby avoiding the welding material affecting the smoothness of the inner wall of the second section 12 and affecting the flexible operation of the valve core 30 in the conduit 10.

[0043] In some embodiments, the outer ring of the stopper 40 is interference-fitted with the inner wall of the conduit 10 to tightly fit the stopper 40 with the conduit 10, so that the laser welding is more firm.

[0044] As shown in FIG. 1 and FIG. 4, the end surface of the end of the sealing ring 20 away from the valve core 30 is flush with the second limiting surface 122, so as to laser weld between the sealing ring 20 and the conduit 10.

[0045] It is conceived that the outer ring of the stopper 40 is in interference fit with the inner wall of the conduit 10 so that the stopper 40 is tightly fitted with the conduit 10, so that the laser welding is more firm. The outer ring of the stopper 40 is laser welded with the conduit 10, avoiding that the soldering material seeps into the second section 12 of the conduit 10 through the gap between the stopper 40 and the conduit 10 in the process of welding the second communication pipe 60, resulting in the reduction of the smoothness of the second section 12, and the spool 30 cannot move flexibly in the conduit 10.

[0046] As shown in FIG. 4, the outer ring of the seal ring 20 is connected with the inner wall of the conduit 10, the inner ring of the seal ring 20 has a first annular flow-through surface 22 close to one end of the spool 30, the flow-through area of the first annular flow-through surface 22 gradually decreases along the valve closing direction, and the inner side of the seal ring 20 has a second annular flow-through surface 23 away from one end of the spool 30, the flow-through area of the second annular flow-through surface 23 gradually increases along the valve closing direction.

[0047] The medium flowing into the valve port 21 is guided by the first annular flow-through surface 22, and the medium flowing into the valve port 21 is guided by the second annular flow-through surface 23, so that the medium flows along the first annular flow-through surface 22 and the second annular flow-through surface 23, so that the flow-through area of the medium gradually changes, avoiding that the flow-through area suddenly changes to cause a large impact of the medium. The arrangement of the first annular flow-through surface 22 and the second annular flow-through surface 23 makes the flow of the medium more stable and less likely to have a large impact, and ensures the flow-through capacity of the valve port 21 without increasing the inner diameter of the valve port 21.

[0048] As shown in FIG. 4, the cross section of the seal ring 20 along the axis direction of the one-way valve is a seal ring cross section, the included angle between the two sides of the first annular flow-through surface 22 in the seal ring cross section is a first cross section angle 221, the included angle between the two sides of the second annular flow-through surface 23 in the seal ring cross section is a second cross section angle 231, the range of the first cross section angle 221 is 50°-100°; and / or, the range of the second cross section angle 231 is 50°-100°.

[0049] In the embodiment, the range of the first cross section angle 221 is 50°-100°, and the range of the second cross section angle 231 is 50°-100°, within which the flow-through capacity of the medium flowing through the valve port 21 is better. Moreover, when the range of the first cross section angle 221 and the second cross section angle 231 is 50°-100°, the flow-through area of the medium changes more slowly, the flow of the medium is more gentle, and a large impact does not occur.

[0050] As shown in FIGS. 1-9, the spool 30 includes a spool body 31 and a guide structure 32, the spool body 31 is a shell structure, the guide structure 32 is arranged on the circumference of the spool body 31 and connected with the outer circumference of the spool body 31, the spool body 31 is used for plugging or opening the valve port 21, and the guide structure 32 is in sliding fit with the inner wall of the conduit 10. The spool body 31 is a shell structure, so that the mass of the spool 30 is smaller, when the pressure difference on both sides of the spool 30 changes, the spool 30 is less affected by its own weight, and can move more flexibly and quickly to open or close the valve port 21. Through the scheme, the pressure difference for driving the spool 30 is smaller, and the movement of the spool 30 is more flexible.

[0051] Specifically, the spool body 31 is used for plugging or opening the valve port 21, and the guide structure 32 is arranged on the circumference of the spool body 31 to guide the spool 30, so that the spool 30 moves along the axis direction of the inner wall of the conduit 10, when the pressure on the side of the spool 30 close to the valve port 21 is greater than the pressure on the side of the spool 30 away from the valve port 21, the valve port 21 is opened, the guide structure 32 guides, and the spool 30 moves along the axis of the inner wall of the conduit 10 to the direction away from the valve port 21; when the pressure on the side of the spool 30 close to the valve port 21 is less than the pressure on the side of the spool 30 away from the valve port 21, the end of the spool body 31 close to the valve port 21 plugs the valve port 21.

[0052] In some embodiments, the shell structure has an open cavity, and the opening of the cavity is arranged at the end of the spool body 31 away from the valve port 21. The weight reduction cavity can also be arranged in the spool 30 to reduce the influence of the self weight of the spool on the flexibility of the one-way valve.

[0053] As shown in FIG. 5, the spool body 31 includes a flow-through section 311, a plugging section 312 and a guide section 313 connected in sequence, the outer diameter of the flow-through section 311 is less than or equal to the inner diameter of the valve port 21, the outer diameter of the plugging section 312 is greater than the inner diameter of the valve port 21, the outer diameter of the guide section 313 is less than the outer diameter of the plugging section 312, and the guide section 313 is arranged on the side of the plugging section 312 away from the valve port 21, and the plugging section 312 is used for plugging the valve port 21. It can be understood that when the spool 30 plugs the valve port 21, the flow-through section 311 of the spool body 31 is inserted into the valve port 21 to plug the valve port, the outer diameter of the plugging section 312 is greater than the inner diameter of the valve port 21, which can ensure the sealing of the valve port 21. When the spool 30 opens the valve port 21, the medium flows through the gap between the flow-through section 311 and the valve port 21, and the medium flows along the outer side walls of the flow-through section 311, the plugging section 312 and the guide section 313 in sequence.

[0054] Specifically, the one end of the flow-through section 311 connected with the blocking section 312 is the first end, the other end of the flow-through section 311 is the second end, the flow-through section 311 is a tapered section, the outer diameter of the first end is larger than the outer diameter of the second end, the position of the first end connected with the blocking section 312 has the first flow guide round corner 34, and the second end has the second flow guide round corner 35; the one end of the flow guide section 313 connected with the blocking section 312 is the third end, the other end of the flow guide section 313 is the fourth end, the flow guide section 313 is a tapered section, and the outer diameter of the third end is larger than the outer diameter of the fourth end. In this way, the flow-through section 311 is a tapered section, the tapered section guides the flow of the medium, buffers the movement of the medium, so that the medium does not produce too much impact on the valve core body 31, and the flow capacity of the medium is increased. The flow guide section 313 is a tapered section, and the outer diameter of the third end is larger than the outer diameter of the fourth end, so that the flow-through area of the medium flowing along the outer sidewall of the flow guide section 313 gradually increases, and the flow capacity of the one-way valve is enhanced without increasing the inner diameter of the valve seat part.

[0055] In some embodiments, the outer wall of the flow-through section 311 can be arc-shaped, so that the medium flows in an arc shape to buffer the impact of the medium; the outer wall of the flow guide section 313 can also be arc-shaped, so that the medium flows in an arc shape to buffer the impact of the medium.

[0056] As shown in FIG. 9, the cross section of the valve core 30 along the axial direction of the one-way valve is a valve core cross section, and the included angle between the two sides of the flow-through section 311 in the valve core cross section is a flow-through angle 33, and the range of the flow-through angle 33 is 50°-100°. When the valve core 30 is separated from the valve port 21, the medium flows through the gap between the flow-through section 311 and the valve port 21, and the medium flows along the outer sidewall of the flow-through section 311 to buffer the impact of the medium. When the range of the flow-through angle 33 is 50°-100°, the effect of buffering the medium is better and the medium can flow better.

[0057] In some embodiments, the thickness of the shell wall of the valve core body 31 ranges from 0.3mm to 1.5mm. Within this thickness range, the weight of the valve core body 31 can be reduced while ensuring the rigidity of the valve core body 31, the influence of the self-weight of the valve core 30 on the opening and closing of the one-way valve is reduced, and the movement of the valve core 30 in the valve seat part is more flexible.

[0058] As shown in FIG. 5, the guide structure 32 comprises a plurality of sheet structures 321 distributed along the outer periphery of the spool body 31 and fixed with the spool body 31, and the outer side wall of the sheet structure 321 is in sliding fit with the inner wall of the conduit 10; in the axial direction of the one-way valve, the length of the spool 30 is N, the spacing between the end of the sheet structure 321 away from the valve port 21 and the end of the spool body 31 away from the valve port 21 is M, and the ratio of M to N ranges from 0.35 to 0.7. The medium flows through the gap between the valve port 21 and the spool body 31 and then through the space between the adjacent two sheet structures 321 to the side of the spool 30 away from the valve port 21; the plurality of sheet structures 321 are distributed along the circumferential direction of the spool body 31, so that the guiding effect of the conduit 10 on the spool 30 is more uniform, and the spool 30 moves in the axial direction of the valve seat portion without being skewed to cause the spool 30 to be stuck. In this embodiment, by limiting M and N, the sheet structure 321 can ensure the guiding function while reducing the weight of the spool 30 as much as possible.

[0059] In some embodiments, the length of the limiting section 3212 in the axial direction of the one-way valve is M, which is greater than or equal to 1 mm, to ensure sufficient guiding length.

[0060] As shown in FIG. 5, the sheet structure 321 comprises a connecting section 3211 and a limiting section 3212 connected with each other, the connecting section 3211 is connected with the spool body 31, the connecting section 3211 has a flow guide inclined surface 3214 at the end close to the valve port 21, the connecting surface between the connecting section 3211 and the limiting section 3212 is flush with the end surface of the end of the spool body 31 away from the valve port 21, the limiting section 3212 is arranged at the side of the connecting section 3211 away from the spool 30 in the axial direction of the one-way valve, and the limiting section 3212 is in stop fit with the stopper 40; the connecting section 3211 of the sheet structure 321 is connected with the spool body 31 to avoid interference between the connecting section 3211 and the valve seat portion when the spool 30 closes the valve port 21. The flow guide inclined surface 3214 guides the medium, which can buffer the impact of the medium on the sheet structure 321, avoid deformation or damage of the sheet structure 321 under the impact of the medium, and prolong the service life of the sheet structure 321.

[0061] As shown in FIG. 6, the outer ring of the stop piece 40 is connected with the inner wall of the conduit 10, the inner ring of the stop piece 40 has a first tapered surface 41 and a second tapered surface 42, the first tapered surface 41 and the second tapered surface 42 are arranged along the axial direction of the conduit 10, the stop piece 40 is limited by the stop position between the first tapered surface 41 and the second tapered surface 42, and the first tapered surface 41 and the second tapered surface 42 are used for guiding the medium. The inner ring of the stop piece 40 has the first tapered surface 41 and the second tapered surface 42, the medium is guided, the medium can flow along the first tapered surface 41 and the second tapered surface 42, and the flow resistance at the stop piece 40 is reduced. The flow resistance of the one-way valve is usually large at the stop position of the stop piece 40, the tapered surfaces (the first tapered surface 41 and the second tapered surface 42) are arranged on both sides of the stop position in the application, the guiding effect of the medium before and after the stop position is good, and the overall flow resistance of the one-way valve can be effectively reduced.

[0062] Specifically, the first tapered surface 41 and the second tapered surface 42 are located on the same tapered surface. In this way, the first tapered surface 41 and the second tapered surface 42 are easy to process, the flow area of the medium gradually changes and changes stably without mutation, the influence of the area change on the flow of the medium is reduced, the turbulence of the medium caused by the area mutation is avoided, the flow of the medium is smoother, the flow capacity at the stop piece 40 is increased, and the flow is maximized in the smallest space.

[0063] Further, the inner diameter of one end of the first tapered surface 41 close to the valve port 21 is smaller than the inner diameter of the other end of the first tapered surface 41; and the inner diameter of one end of the second tapered surface 42 close to the valve port 21 is smaller than the inner diameter of the other end of the second tapered surface 42.

[0064] It can be understood that the inner diameter of the first tapered surface 41 gradually decreases from one end close to the valve port 21 to one end away from the valve port 21; and the inner diameter of the second limiting portion 44 gradually decreases from one end close to the valve port 21 to one end away from the valve port 21. The flow area of the medium gradually decreases from the second tapered surface 42 to the first tapered surface 41, so that the medium can flow along the first tapered surface 41 and the second tapered surface 42. During the flow of the medium, the flow area gradually changes and does not mutate, and the medium does not produce a large impact on the stop piece 40 due to the mutation of the flow area.

[0065] The one end of the second tapered surface 42 close to the valve port 21 is connected with the second section 12, and the inner diameter of the one end of the second tapered surface 42 close to the valve port 21 is equal to the inner diameter of the second section 12.

[0066] In the embodiment, the stopper 40 comprises a first limiting portion 43 and a second limiting portion 44 connected with each other, the inner diameter of the first limiting portion 43 is smaller than the outer diameter of the valve core 30, and the end face of the one end of the first limiting portion 43 close to the valve port 21 is in abutting stop with the end face of the one end of the valve core 30 away from the valve port 21; the second limiting portion 44 is arranged on the side of the first limiting portion 43 close to the valve port 21, the second limiting portion 44 is connected with the end face of the one end of the first limiting portion 43 close to the valve port 21, and the inner diameter of the second limiting portion 44 is larger than the inner diameter of the first limiting portion 43. In this way, by making the inner diameter of the first limiting portion 43 smaller than the outer diameter of the valve core 30, the end face of the one end of the first limiting portion 43 close to the valve port 21 is in abutting stop with the valve core 30, so as to avoid the valve core 30 from being pulled out of the conduit 10.

[0067] The first tapered surface 41 is arranged on the inner ring of the first limiting portion 43, and the second tapered surface 42 is arranged on the inner ring of the second limiting portion 44. The first tapered surface 41 and the second tapered surface 42 are arranged on the first limiting portion 43 and the second limiting portion 44 respectively, so that the first tapered surface 41 can guide the flow of the buffer medium while the end face of the first limiting portion 43 can abut against the end face of the valve core 30; the second tapered surface 42 can guide the flow of the buffer medium while the inner ring of the second limiting portion 44 can radially limit the valve core body 31 of the valve core 30.

[0068] Optionally, the first tapered surface 41 and the second tapered surface 42 gradually approach or gradually move away from the axis of the stopper 40 from the direction close to the valve port 21 to the direction away from the valve port 21. In this way, the flow capacity at the position of the stopper 40 can be adjusted.

[0069] It is conceived that, in one of the specific embodiments, the first tapered surface 41 and the second tapered surface 42 are machined first, and then the first limiting portion 43 and the second limiting portion 44 are machined, so as to ensure that the first tapered surface 41 and the second tapered surface 42 are on the same tapered surface, thereby guiding the flow of the medium and buffering the impact of the medium, and increasing the flow capacity of the check valve.

[0070] In the embodiment, when the first limiting portion 43 is in abutting stop with the valve core 30, the first limiting portion 43 is in surface contact with the valve core 30, and the end faces of the first limiting portion 43 and the valve core 30 in abutting stop are perpendicular to the movement direction of the valve core 30. In this way, the end face of the one end of the first limiting portion 43 close to the valve port 21 abuts against the end face of the one end of the valve core 30 close to the stopper 40, and no circumferential limiting relationship occurs, so that when the valve core 30 is skewed or the angle changes during movement, the valve core 30 will not be stuck with the stopper 40, and the flexible movement of the valve core 30 is ensured.

[0071] In some embodiments, the valve core 30 has a fitting section at one end close to the stopper 40, the fitting section can be inserted into the inner ring of the second limiting part 44, and the outer wall of the fitting section is located in the same annular ring, the diameter of the annular ring is E, the inner diameter of the second limiting part 44 is F, F is greater than E, and the difference between F and E is in the range of 0.3mm to 1.5mm. By setting F greater than E, the second limiting part 44 is gap-fitted with the fitting section, the second limiting part 44 limits the fitting section in the radial direction, so that the fitting section can smoothly enter and exit the inner ring of the second limiting part 44, and prevents the second limiting part 44 from being stuck with the fitting section, affecting the normal work of the valve core 30.

[0072] Specifically, the guide structure 32 includes a plurality of sheet structures 321 arranged circumferentially along the valve core body 31, one side of the sheet structure 321 is connected with the valve core body 31, the other side of the sheet structure 321 is in sliding fit with the inner wall of the conduit 10, and one end of the sheet structure 321 away from the valve port 21 has an inner recessed section 3213 which can be inserted into the inner ring of the second limiting part 44, and the inner recessed sections 3213 of the plurality of sheet structures 321 form a fitting section. It can be understood that the one end of the sheet structure 321 away from the valve port 21 has an inner recessed section 3213, i.e., the one end of the limiting section 3212 away from the valve port 21 has an inner recessed section 3213, and the inner recessed section 3213 is in stop fit with the stopper 40. In this way, the fitting section is formed, the plurality of sheet structures 321 are arranged circumferentially on the valve core body 31, so that the guiding effect of the sheet structure 321 on the valve core 30 is more uniform, and the valve core 30 does not angularly deflect during movement along the axis direction of the inner wall of the conduit 10, and the valve core 30 and the inner wall of the conduit 10 are not easily stuck.

[0073] It can be understood that the second limiting part 44 is gap-fitted with the inner recessed section 3213, so that the movement of the valve core 30 is more flexible, and the valve core 30 is prevented from being stuck by the second limiting part 44.

[0074] In some embodiments, the outer ring of the one end of the valve core 30 close to the stopper 40 has an arc surface 36, and the part of the arc surface 36 close to the end face of the valve core 30 abuts against the end face of the one end of the first limiting part 43 close to the valve port 21. It can be understood that in the present embodiment, the one end of the valve core 30 close to the stopper 40 is the one end of the inner recessed section 3213 close to the stopper 40 (it can also be understood as the one end of the inner recessed section 3213 abutting against the stopper 40), when the valve core 30 is in stop fit with the stopper 40, the arc surface 36 can reduce the impact and play a certain guiding role. It can be understood that the part of the arc surface 36 connected with the end face of the valve core 30 abuts against the end face of the first limiting part 43, avoiding linear contact between the arc surface 36 and the first limiting part 43, and preventing the valve core 30 from being stuck with the stopper 40 due to the large inclination angle of the contact position.

[0075] In some embodiments, the valve core 30 is processed by powder metallurgy; or, the valve core 30 is processed by die forming. By processing the valve core 30 by powder metallurgy, the process is less, the material utilization is high, the cost can be saved, and the complex shape of the valve core 30 can be adapted. By processing the valve core 30 by die forming, the production efficiency is higher, the manufacturing precision of the manufactured valve core 30 is higher, and the valve core 30 with complex structure can be formed at one time without multiple processing.

[0076] According to another aspect of the present application, a valve group device is provided, comprising a first communication pipe 50, a second communication pipe 60 and the above-mentioned one-way valve, the first communication pipe 50 is connected with the conduit 10 of the one-way valve at one end close to the stop piece 40, the second communication pipe 60 is connected with the conduit 10 at one end close to the seal ring 20, the first communication pipe 50 and the second communication pipe 60 are cast iron or steel materials.

[0077] The conduit 10 can be connected with the first communication pipe 50 and the second communication pipe 60 by welding, which is simpler and more convenient than connecting the sleeve at both ends of the conduit 10 and then connecting the sleeve with the first communication pipe 50 and the second communication pipe 60.

[0078] Further, the first communication pipe 50 is connected with the conduit 10 by furnace welding, and the second communication pipe 60 is connected with the conduit 10 by furnace welding.

[0079] In one specific embodiment, the conduit 10, the seal ring 20, the valve core 30 and the stop piece 40 of the one-way valve are cast iron or steel materials, and the conduit 10 can be connected with the first communication pipe 50 and the second communication pipe 60 by integral furnace welding or other welding methods. Compared with the prior art of setting a sleeve at the end of the conduit 10 and connecting the conduit 10 with the first communication pipe 50 and the second communication pipe 60 through the sleeve, the welding method saves cost and is simple in process. For example, by integral furnace welding, both ends of the conduit 10 are connected with the first communication pipe 50 and the second communication pipe 60, which is more convenient and saves cost. It can be understood that in other embodiments, the conduit 10 can also be connected with the first communication pipe and the second communication pipe by laser welding.

[0080] In some embodiments, the conduit 10, the seal ring 20, the valve core 30, the stop piece 40, the first communication pipe 50 and the second communication pipe 60 can also be made of carbon steel or stainless steel.

[0081] The advantages of the present application are:

[0082] 1. The conduit 10, the seal ring 20, the valve core 30, the stop piece 40 and the communication pipe are all made of cast iron or steel materials, so that the communication pipe and the conduit 10 can be connected by integral furnace welding, which is more convenient;

[0083] 2、The conduit 10 is provided with a first limiting surface 121 and a second limiting surface 122 to limit the length of the first communication pipe 50 and the second communication pipe 60 inserted into the conduit 10, avoiding the interference of the part of the first communication pipe 50 and the second communication pipe 60 inserted into the conduit 10 to the movement of the valve core 30;

[0084] 3、The first annular flow surface 22 and the second annular flow surface 23 guide the medium, making the flow of the medium more stable and less likely to have a large impact, and ensuring the flow capacity of the valve port 21 without increasing the inner diameter of the valve port 21;

[0085] 4、The first cross-sectional angle 221 of the first annular flow surface 22 is in the range of 50°-100°, and the second cross-sectional angle 231 of the second annular flow surface 23 is in the range of 50°-100°, within which range the flow capacity of the medium flowing through the valve port 21 is better, and the flow area of the medium changes more slowly, making the flow of the medium more gentle and less likely to have a large impact;

[0086] 5、The inner ring of the stopper 40 has a first tapered surface 41 and a second tapered surface 42 to guide the medium, making the medium flow along the first tapered surface 41 and the second tapered surface 42 and reducing the flow resistance at the stopper;

[0087] 6、The first tapered surface 41 and the second tapered surface 42 are located on the same tapered surface, making the flow of the medium more smooth and increasing the flow capacity at the stopper 40 to maximize the flow in the smallest space;

[0088] 7、The second tapered surface 42 guides the valve core 30, making the fitting section (multiple inner contraction sections 3213) enter the inner ring of the second limiting portion 44;

[0089] 8、The second limiting portion 44 is gap-fitted with the fitting section (multiple inner contraction sections 3213), avoiding the inner ring of the second limiting portion 44 from jamming the valve core 30 and ensuring the flexible movement of the valve core 30.

[0090] The above is only an optional embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A one-way valve characterized by, The utility model relates to a single -way valve, including: Conduit (10); Seal ring (20) is arranged in the conduit (10), the seal ring (20) has valve port (21); Valve core (30) is movably arranged in the conduit (10) to open and close the valve port (21); Stop piece (40) is arranged in the conduit (10) and is arranged in the valve core (30) side away from the seal ring (20), and the stop piece (40) is used to stop the valve core (30); Wherein, the conduit (10), the seal ring (20), the valve core (30) and the stop piece (40) are cast iron or steel material, or one or several of the conduit (10), the seal ring (20), the valve core (30) and the stop piece (40) are cast iron, and the rest is steel material.

2. The one-way valve of claim 1, wherein The end face outer ring of the seal ring (20) away from the valve core (30) is annular laser welded with the inner wall of the conduit (10);And / or, the end face outer ring of the stop piece (40) away from the valve core (30) is annular laser welded with the inner wall of the conduit (10).

3. The one-way valve of claim 1, wherein, The conduit (10) includes first section (11), second section (12) and third section (13) connected in turn, the inner diameter of the second section (12) is less than the inner diameter of the first section (11) and the third section (13), and the first section (11) and the second section (12) form the first limit surface (121), and the third section (13) and the second section (12) form the second limit surface (122).

4. The check valve according to claim 3, wherein The stop piece (40) is located in the first section (11), and the stop piece (40) abuts against the first limit surface (121); The seal ring (20) is located in the second section (12), and the end face of the seal ring (20) away from the valve core (30) is flush with the second limit surface (122).

5. The one-way valve of claim 1, wherein The outer ring of the seal ring (20) is connected with the inner wall of the conduit (10), one end of the inner ring of the seal ring (20) close to the valve core (30) has a first annular flow-through surface (22), the flow-through area of the first annular flow-through surface (22) gradually decreases along the valve closing direction, and one end of the inner side of the seal ring (20) away from the valve core (30) has a second annular flow-through surface (23), the flow-through area of the second annular flow-through surface (23) gradually increases along the valve closing direction.

6. The one-way valve of claim 5, wherein, The cross section of the seal ring (20) along the axis direction of the check valve is a seal ring cross section, the included angle between the two sides of the first annular flow-through surface (22) in the seal ring cross section is a first cross section angle (221), the included angle between the two sides of the second annular flow-through surface (23) in the seal ring cross section is a second cross section angle (231), and the range of the first cross section angle (221) is 50°-100°;And / or, the range of the second cross section angle (231) is 50°-100°.

7. The one-way valve of claim 1, wherein The valve core (30) comprises a valve core body (31) and a guide structure (32), the valve core body (31) is a shell structure, the guide structure (32) is arranged on the circumference of the valve core body (31) and connected with the outer circumference of the valve core body (31), the valve core body (31) is used for blocking or opening the valve port (21), and the guide structure (32) is in sliding fit with the inner wall of the conduit (10).

8. The one-way valve of claim 7, wherein, The valve core body (31) comprises a flow-through section (311), a blocking section (312) and a flow guide section (313) connected in sequence, the outer diameter of the flow-through section (311) is less than or equal to the inner diameter of the valve port (21), the outer diameter of the blocking section (312) is greater than the inner diameter of the valve port (21), the outer diameter of the flow guide section (313) is less than the outer diameter of the blocking section (312), and the flow guide section (313) is arranged on the side of the blocking section (312) away from the valve port (21), and the blocking section (312) is used for blocking the valve port (21).

9. The one-way valve of claim 8, wherein, The cross section of the valve core (30) along the axial direction of the one-way valve is a valve core cross section, and the included angle between the two sides of the flow-through section (311) in the valve core cross section is a flow-through angle (33), and the range of the flow-through angle (33) is 50°-100°.

10. The one-way valve of claim 7, wherein, The thickness of the shell wall of the valve core body (31) ranges from 0.3mm to 1.5mm.

11. The one-way valve of claim 7, wherein, The guide structure (32) comprises a plurality of sheet structures (321), the plurality of sheet structures (321) are distributed along the outer circumference of the valve core body (31) and fixed with the valve core body (31), the outer side wall of the sheet structure (321) is in sliding fit with the inner wall of the conduit (10), along the axial direction of the one-way valve, the length of the valve core (30) is N, the spacing between the end of the sheet structure (321) away from the valve port (21) and the end of the valve core body (31) away from the valve port (21) is M, and the ratio of M to N ranges from 0.35 to 0.

7.

12. The one-way valve of claim 1, wherein, The outer ring of the stop piece (40) is connected with the inner wall of the conduit (10), the inner ring of the stop piece (40) has a first tapered surface (41) and a second tapered surface (42), the first tapered surface (41) and the second tapered surface (42) are arranged in the axial direction of the conduit (10), the stop position of the stop piece (40) to the valve core (30) is located between the first tapered surface (41) and the second tapered surface (42), and the first tapered surface (41) and the second tapered surface (42) are used for guiding the medium.

13. The one-way valve of claim 12, wherein, The first tapered surface (41) and the second tapered surface (42) are located on the same tapered surface.

14. The one-way valve according to claim 12, wherein The inner diameter of the end of the first tapered surface (41) close to the valve port (21) is smaller than the inner diameter of the other end of the first tapered surface (41); The inner diameter of the end of the second tapered surface (42) close to the valve port (21) is smaller than the inner diameter of the other end of the second tapered surface (42).

15. The one-way valve of claim 14, wherein, The conduit (10) comprises a first section (11) and a second section (12) connected with each other, the inner diameter of the second section (12) is smaller than that of the first section (11), a first limiting surface (121) is formed between the first section (11) and the second section (12), the stopper (40) is located in the first section (11) and abuts against the first limiting surface (121), the second tapered surface (42) is connected with the second section (12) at one end close to the valve port (21), and the inner diameter of the second tapered surface (42) at the one end close to the valve port (21) is equal to that of the second section (12).

16. The one-way valve of claim 12, wherein, The stopper (40) comprises a first limiting part (43) and a second limiting part (44) connected with each other, the inner diameter of the first limiting part (43) is smaller than the outer diameter of the valve core (30), and the end face of the first limiting part (43) at one end close to the valve port (21) is in abutting fit with the end face of the valve core (30) away from the valve port (21); the second limiting part (44) is arranged on the side of the first limiting part (43) close to the valve port (21), is connected with the end face of the first limiting part (43) at one end close to the valve port (21), and has an inner diameter greater than that of the first limiting part (43).

17. The one-way valve of claim 16, wherein, The first tapered surface (41) is arranged on the inner ring of the first limiting part (43), and the second tapered surface (42) is arranged on the inner ring of the second limiting part (44).

18. The one-way valve of claim 16, wherein, When the first limiting part (43) is in abutting fit with the valve core (30), the first limiting part (43) is in surface contact with the valve core (30), and the end faces of the first limiting part (43) and the valve core (30) in abutting fit are perpendicular to the movement direction of the valve core (30).

19. The one-way valve of claim 16, wherein, The end of the valve core (30) close to the stopper (40) has a fitting section, the fitting section can be inserted into the inner ring of the second limiting part (44), the outer side wall of the fitting section is located on the same annular ring, the diameter of the annular ring is E, the inner diameter of the second limiting part (44) is F, F is greater than E, and the difference between F and E ranges from 0.3 mm to 1.5 mm.

20. The one-way valve of claim 19, wherein, The valve core (30) comprises a valve core body (31) and a guide structure (32), the guide structure (32) comprises a plurality of sheet structures (321) arranged circumferentially along the valve core body (31), one side of the sheet structure (321) is connected with the valve core body (31), the other side of the sheet structure (321) is in sliding fit with the inner wall of the conduit (10), and the end of the sheet structure (321) away from the valve port (21) has an inner retracted section (3213) which can be inserted into the inner ring of the second limiting part (44), and the inner retracted sections (3213) of the plurality of sheet structures (321) form the fitting section.

21. The one-way valve of claim 1, wherein, The valve core (30) is processed by means of powder metallurgy, or the valve core (30) is processed by means of mold forming.

22. A valve train arrangement characterised by The single-way valve according to any one of claims 1 to 21, a first communication pipe (50) connected to the conduit (10) of the single-way valve at a position close to the stopper (40), and a second communication pipe (60) connected to the conduit (10) at a position close to the seal ring (20), wherein the first communication pipe (50) and the second communication pipe (60) are made of cast iron or steel.

23. The valve group apparatus of claim 22, wherein The first communication pipe (50) is connected to the conduit (10) by means of furnace welding, and the second communication pipe (60) is connected to the conduit (10) by means of furnace welding.

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