Valve element, press fitting jig, valve element manufacturing method and one-way valve

Abstract

The invention discloses a valve element, a press fitting jig, a valve element manufacturing method and a one-way valve, and relates to the technical field of valves.The valve element is applied to the one-way valve and comprises a base disc, a fixing piece and an annular gasket, the base disc comprises a disc body and a fixing sleeve, and the fixing sleeve is connected to the center of one side of the disc body; the fixing part comprises an annular gland and a fixing ring, an inner ring of the annular gland is connected to an outer ring of the fixing ring, the fixing sleeve is sleeved with the fixing ring, and the annular gland and the disc body are arranged in a spaced mode; the end, away from the disc body, of the fixing sleeve is folded outwards to form a press-fit part which abuts against the side, away from the disc body, of the fixing ring. The fixing ring is sleeved with the annular gasket, and the annular gasket is clamped between the annular gland and the disc body. The press fitting jig is used for machining the valve element. According to the technical scheme, the reliability of pressing the annular gland and the base disc through the pressing part is high, and structural connection of all parts of the valve element is stable and not prone to loosening.

Description

Technical Field

[0001] The present invention relates to the field of valve technology, and in particular to a valve core, a press-fitting jig, a valve core manufacturing method and a one-way valve. Background Art

[0002] A one-way valve is a fluid control structure that is mainly used to control the flow of fluid (such as liquid or gas) in one direction and prevent it from flowing in the opposite direction. This valve is often used in many industries and engineering, such as in hydraulic systems, pipeline systems, pump stations and various mechanical equipment.

[0003] A one-way valve is usually composed of a valve body, a valve core and a pressure structure. There is a channel inside the valve body, and the channel wall is formed with a stop flange, through which the fluid flows. Under normal working conditions, when the fluid pressure reaches the opening pressure value of the one-way valve, the valve core is pushed to leave the stop flange, thereby allowing the fluid to pass through the valve. When the fluid stops flowing or flows in the reverse direction, the valve core automatically closes under the action of the pressure structure force to prevent the fluid from flowing in the reverse direction.

[0004] The valve core of a one-way valve usually includes a base plate, a fixed plate and a gasket. The gasket is sandwiched between the base plate and the fixed plate, and the gasket abuts against the stop flange to achieve good sealing. However, the base plate and the fixed plate of the existing one-way valve are fixed together by screws. When the one-way valve is used for one-way conduction of high-pressure and high-flow rate fluids, the valve core is subjected to a large and unstable impact force. Especially when dealing with liquid fluids, there is a high risk of the screws being loosened due to torsion. Summary of the invention

[0005] The main purpose of the present invention is to provide a one-way valve, aiming to improve the stability of the valve core.

[0006] To achieve the above object, the present invention provides a valve core, which is applied to a one-way valve, comprising: A base plate, comprising a plate body and a fixing sleeve, wherein the fixing sleeve is connected to the center of one side of the plate body; A fixing member, the fixing member comprises an annular gland and a fixing ring, the inner ring of the annular gland is connected to the outer ring of the fixing ring, the fixing ring is sleeved outside the fixing sleeve, and the annular gland is spaced apart from the disc body; The end of the fixing sleeve away from the disc body is folded outward to form a pressing portion, and the pressing portion is pressed against a side of the fixing ring away from the disc body; and An annular gasket is sleeved outside the fixing ring and clamped between the annular gland and the disc body.

[0007] In some embodiments of the present invention, the wall thickness of the fixing sleeve is arranged to decrease in a direction away from the disc body.

[0008] In some embodiments of the present invention, the inner wall of the fixed sleeve at one end away from the disc body is configured as a conical surface, and the angle between the generatrix of the conical surface and the axis is greater than or equal to 15 degrees and less than or equal to 25 degrees.

[0009] In some embodiments of the present invention, the ratio of the wall thickness of the end of the fixing sleeve away from the disc body to the inner diameter of the end of the fixing sleeve close to the disc body is greater than or equal to 1 / 40 and less than or equal to 1 / 50; The wall thickness of the end of the fixing sleeve away from the disc body is not less than 0.2 mm.

[0010] In some embodiments of the present invention, the ratio of the width of the pressing portion to the axial thickness of the fixing member is greater than or equal to 1 / 4 and less than or equal to 1 / 6.

[0011] The present invention further provides a press-fitting jig, which is used for processing the valve core, and comprises: A frame, the frame comprising a seat body, a mounting platform and a plurality of guide rods, the seat body being provided with a mounting position for placing the valve core, the seat body being provided with a plurality of guide holes around the mounting position, the mounting platform being located above the seat body, the top ends of the plurality of guide rods being fixed to the mounting platform, and the bottom ends being slidably connected to the corresponding guide holes; The press-fitting assembly includes a primary expansion ejector pin and a flat pressing ejector pin, wherein the primary expansion ejector pin and the flat pressing ejector pin are switchably mounted on the mounting platform, the primary expansion ejector pin is provided with a tapered end to expand the port of the fixed sleeve, and the flat pressing ejector pin is provided with a flat pressing end to flatten the expanded port of the fixed sleeve.

[0012] In some embodiments of the present invention, the pressing fixture also includes an elastic member and a pressure plate, the upper end of the elastic member is connected to the bottom surface of the mounting platform, the lower end of the elastic member is connected to the pressure plate, and the bottom surface of the pressure plate is used to press the annular pressure cover.

[0013] In some embodiments of the present invention, the press-fitting fixture further comprises a plurality of pressure-adjusting bolts, the mounting platform is provided with a plurality of sliding holes, and the pressing plate is provided with a plurality of threaded holes; The pressure-adjusting bolt includes a head and a rod body connected to each other, an end of the rod body away from the head is provided with a thread and is threadedly connected to the corresponding threaded hole, an end of the rod body close to the head is slidably connected to the corresponding sliding hole, the head is limited to a side of the sliding hole opposite to the pressure plate, and the elastic member is pressed between the mounting platform and the pressure plate.

[0014] In some embodiments of the present invention, the press-fitting jig further includes a secondary flaring ejector pin, which is switchably mounted on the mounting table together with the primary flaring ejector pin and the flat pressing ejector pin, and the inclination of the tapered end of the secondary flaring ejector pin is greater than the inclination of the tapered end of the primary flaring ejector pin.

[0015] The present invention also provides a valve core manufacturing method, which is used to manufacture the valve core, comprising the following steps: Put the annular gasket and the fixing piece onto the fixed sleeve to be processed, with the port of the fixed sleeve facing upward, and place the valve core on a horizontal processing table; Insert the conical end of the primary flaring ejector pin into the port of the fixed sleeve, and apply a linearly increasing axial downward pressure to the primary flaring ejector pin until the outward expansion angle of the end of the fixed sleeve is equal to the inclination of the conical end of the primary flaring ejector pin, and then remove the primary flaring ejector pin; Insert the end of the secondary flaring ejector pin into the port of the fixed sleeve, wherein the slope of the tapered end of the secondary flaring ejector pin is greater than the slope of the tapered end of the primary flaring ejector pin, apply a linearly increasing axial downward pressure to the secondary flaring ejector pin until the outward expansion angle of the end of the fixed sleeve is equal to the slope of the tapered end of the secondary flaring ejector pin, and then take out the secondary flaring ejector pin; A flat surface of the flattening and expanding ejector pin is pressed against the expanded port of the fixed sleeve, and a linearly increasing axial downward pressure is applied to the flattening and expanding ejector pin until the end of the fixed sleeve is folded to form the pressing portion.

[0016] The present invention also provides a one-way valve, comprising a valve body, a positioning structure, a pressure-applying structure and the valve core; wherein: A fluid channel is provided in the valve body, a stop flange and a plurality of guide parts are convexly provided on the wall surface of the fluid channel, and one end of the plurality of guide parts is connected to one side of the stop flange; A positioning structure, wherein the positioning structure is provided with a flow hole, the periphery of the positioning structure is connected to the wall surface of the fluid channel, and is located at an end of the guide portion away from the stop flange; The outer periphery of the base plate is slidably matched with the plurality of guide parts; The pressure-applying structure is installed between the base plate and the positioning structure under pressure, and has a tendency to stretch along the extending direction of the fluid channel so that one side edge of the annular gasket abuts against the stop flange.

[0017] In the technical solution of the present invention, the end of the fixed sleeve away from the disc body is folded outward to form a pressing portion, and the pressing portion is pressed against the side of the annular pressure cover away from the disc body, so that the annular pressure cover and the disc body can stably clamp the annular gasket. In practical applications, when the valve core located in the one-way valve is subjected to a strong impact of the fluid, the pressing portion is mostly subjected to axial pressure toward the annular pressure cover, which enables the pressing portion to be further pressed on the annular pressure cover. The pressing portion is also subjected to circumferential torsion, which has almost no effect on the structural stability of the pressing portion. Therefore, the reliability of pressing the annular pressure cover and the base disc through the pressing portion is high, and the structural connection of the various parts of the valve core is stable and not easy to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A schematic structural diagram of an embodiment of a one-way valve provided by the present invention; Figure 2 A schematic structural diagram of another perspective of an embodiment of a one-way valve provided by the present invention; Figure 3 A cross-sectional view of an embodiment of a one-way valve provided by the present invention; Figure 4 for Figure 3 The enlarged view of point A in the middle; Figure 5 An exploded view of a valve core in a one-way valve provided by the present invention; Figure 6 A schematic diagram of the structure of a valve body in a one-way valve provided by the present invention; Figure 7 This is a schematic structural diagram of an embodiment of a press-fitting fixture provided by the present invention.

[0020] Description of Figure Numbers: 100, one-way valve; 11, valve body; 111, fluid channel; 112, stop flange; 113, guide rib; 114, first annular groove; 12, valve core; 121, base plate; 1211, plate body; 1212, fixed sleeve; 1213, pressing part; 1214, conical surface; 1215, positioning rib; 122, fixing member; 1221, annular gland; 1222, fixing ring; 123, annular gasket ; 130, positioning structure; 1321, flow hole; 14, pressure structure; 200, press-fitting fixture; 210, seat body; 211, guide hole; 220, mounting table; 221, sliding hole; 230, guide rod; 241, primary expansion ejector pin; 242, secondary expansion ejector pin; 243, flat pressure ejector pin; 244, elastic member; 245, pressure plate; 247, pressure regulating bolt; 2471, head; 2472, rod body.

[0021] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0024] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] See also Figures 1 to 5 The present invention provides a valve core 12, including a base plate 121, a fixing member 122 and an annular gasket 123, wherein the base plate 121 includes a plate body 1211 and a fixing sleeve 1212, wherein the fixing sleeve 1212 is connected to the center of one side of the plate body 1211; the fixing member 122 includes an annular gland 1221 and a fixing ring 1222, wherein the inner ring of the annular gland 1221 is connected to the outer ring of the fixing ring 1222, and the fixing ring 1222 is fitted The annular pressure cover 1221 is spaced apart from the disk body 1211 outside the fixed sleeve 1212; the end of the fixed sleeve 1212 away from the disk body 1211 is folded outward to form a pressing portion 1213, and the pressing portion 1213 is pressed against the side of the fixed ring 1222 away from the disk body 1211; the annular gasket 123 is sleeved outside the fixed ring 1222 and clamped between the annular pressure cover 1221 and the disk body 1211.

[0026] The above-mentioned valve core 12 is applied to the one-way valve 100. Specifically, the one-way valve 100 includes a valve body 11, a positioning structure 130, a pressure structure 14 and the valve core 12; wherein, a fluid channel 111 is arranged in the valve body 11, and a stop flange 112 and a plurality of guide parts are convexly provided on the wall surface of the fluid channel 111, and one end of the plurality of guide parts is connected to one side of the stop flange 112; the positioning structure 130 is provided with a flow hole, and the periphery of the positioning structure 130 is connected to the wall surface of the fluid channel and is located at the end of the guide part away from the stop flange 112; the outer periphery of the base plate 121 is slidably matched with the plurality of guide parts; the pressure structure 14 is installed under pressure between the base plate 121 and the positioning structure 130, and the pressure structure 14 has a tendency to stretch along the extension direction of the fluid channel 111, so that one side edge of the annular gasket 123 abuts against the stop flange 112.

[0027] In the technical solution of the present invention, the end of the fixed sleeve 1212 away from the disk body 1211 is folded outward to form a pressing portion 1213, and the pressing portion 1213 is pressed against the side of the annular pressure cover 1221 away from the disk body 1211, so that the annular pressure cover 1221 and the disk body 1211 can stably clamp the annular gasket 123. In actual application, when the valve core 12 located in the one-way valve 100 is subjected to a strong impact of the fluid, the pressing portion 1213 is mostly subjected to axial pressure toward the annular pressure cover 1221, which enables the pressing portion 1213 to be further pressed on the annular pressure cover 1221. The pressing portion 1213 is also subjected to circumferential torsion, which has almost no effect on the structural stability of the pressing portion 1213. Therefore, the reliability of pressing the annular pressure cover 1221 and the base disk 121 by the pressing portion 1213 is high, and the structural connection of the various parts of the valve core 12 is stable and not easy to loosen.

[0028] The valve body 11 is made of a rigid material, generally metal, but also plastic, and can cope with scenes with low fluid pressure. In some embodiments of the present invention, the guide portion is provided as a guide rib 113. Generally, at least three guide ribs 113 are provided, and at least three guide ribs 113 are arranged at equal intervals around the valve core 12 to ensure the stability of the valve core 12 when sliding, and due to the existence of the guide ribs 113, a gap is formed between the periphery of the valve core 12 and the inner wall of the valve core 12 for fluid circulation.

[0029] The disc body 1211 and the fixed sleeve 1212 of the base of the valve core 12 are generally formed in one piece. On the one hand, the connection strength is high. On the other hand, there is no assembly gap between the disc body 1211 and the fixed sleeve 1212, which can avoid the residual medium. The base disc 121 and the fixed sleeve 1212 are made of metal materials, which can be stainless steel, copper alloy, etc. In some embodiments of the present invention, the material of the fixed sleeve 1212 is austenitic stainless steel, which is corrosion-resistant, has a long service life, and has high strength. It can cope with the high-pressure impact of the fluid without deformation. In addition, when the fixed sleeve 1212 is folded to make the pressing part 1213, due to the high plasticity of the above-mentioned metal material, the pressing part 1213 after folding can maintain the ideal structural strength and does not change for a long time. The annular gasket 123 is usually made of rubber, polytetrafluoroethylene and other materials, and has good sealing performance and chemical stability. The sealing gasket is used to resist the stop flange 112 to block the fluid channel. The pressure structure 14 may be a compression spring, a bellows, or two magnetically repelling structures, which can exert continuous pressure on the positioning structures 130 and the valve core 12 at both ends and can produce deformation to restore the original state.

[0030] In some embodiments of the present invention, the wall thickness of the fixed sleeve 1212 is set to decrease in the direction away from the disc body 1211. In this way, the wall thickness of the end of the fixed sleeve 1212 connected to the disc body 1211 is relatively large, and the strength of the integral connection with the disc body 1211 is relatively high. The wall thickness of the end of the fixed sleeve 1212 away from the disc body 1211 is relatively small, which is convenient for folding to form the pressing part 1213, and can also avoid the problem of the folded part of the fixed sleeve 1212 being broken when the folded part is too thick.

[0031] The fixed sleeve 1212 and the disk body 1211 can be turned from a workpiece or can be two separate workpieces connected by welding. It should be noted that the high temperature generated during welding and the residual temperature left after welding must be avoided to affect the annular gasket 123. The annular gasket 123 can be installed after natural cooling for 5 minutes after welding.

[0032] See also Figure 5In some embodiments of the present invention, the inner wall of the fixed sleeve 1212 at one end away from the disc body 1211 is set as a tapered surface 1214, and the included angle a between the generatrix of the tapered surface 1214 and the axis is greater than or equal to 15 degrees and less than or equal to 25 degrees. The included angle between the generatrix of the tapered surface 1214 and the axis can be 15 degrees, 18 degrees, 20 degrees, 22 degrees, 25 degrees, etc., and such an angle range can ensure that the pressing portion 1213 has a sufficient width to limit the fixing member 122, and can also facilitate the insertion of the expansion pin during the folding process to expand the port of the fixed sleeve 1212.

[0033] Furthermore, considering that the ratio of the wall thickness to the inner diameter of the fixed sleeve 1212 affects the strength of the fixed sleeve 1212, the size of the pressing portion 1213 of the fixed sleeve 1212 relative to the other parts of the fixed sleeve 1212 has a greater influence on the overall structural strength of the valve core 12. Therefore, in some embodiments of the present invention, the ratio of the wall thickness of the end of the fixed sleeve 1212 away from the disk body 1211 to the inner diameter of the end of the fixed sleeve 1212 close to the disk body 1211 is greater than or equal to 1 / 40 and less than or equal to 1 / 50; specifically, it can be 1 / 40, 1 / 43, 1 / 45, 1 / 47, 1 / 50, etc. The wall thickness of the end of the fixed sleeve 1212 away from the disk body 1211 is not less than 0.2 mm, specifically, it can be 0.2 mm, 0.3 mm, 0.5 mm, 0.7 mm, etc. On the one hand, it can avoid the problem that the port wall thickness of the fixed sleeve 1212 is relatively large, which makes the port difficult to fold and there is a high risk of structural cracking during the folding process. On the other hand, it can also avoid the problem that the port wall thickness of the fixed sleeve 1212 is relatively small, which makes the strength of the pressing part 1213 after the folding process unable to meet the expected requirements. In addition, the wall thickness of the end of the fixed sleeve 1212 away from the disc body 1211 is limited to a range greater than or equal to 0.2 mm to prevent the pressing part 1213 from being too thin and insufficient in strength, thereby ensuring the structural stability of the valve core 12.

[0034] In addition, the ratio of the width of the pressing portion 1213 to the axial thickness of the fixing member 122 also has a great influence on the stability of the valve core 12. It should be noted that the definition of the width of the pressing portion 1213 mentioned here can refer to Figure 3The mark d in the figure means, specifically, the width of the pressing part 1213 refers to the distance between the outer wall of one end of the fixed sleeve 1212 close to the disk body 1211 and the outer edge of the contact surface between the pressing part 1213 and the fixing part 122 in the radial direction of the fixed sleeve 1212. In some embodiments of the present invention, the ratio of the width of the pressing part 1213 to the axial thickness of the fixing part 122 is greater than or equal to 1 / 4 and less than or equal to 1 / 6. Specifically, it can be 1 / 4, 1 / 5, 1 / 6, etc. In this way, the size of the pressing part 1213 is adapted to that of the fixing part 122, avoiding the problem that the size of the fixing part 122 is relatively too large, the pressing part 1213 is difficult to form a reliable limit for the fixing part 122, or the size of the pressing part 1213 is relatively too large, resulting in increased processing requirements for the folding process.

[0035] The specific structure of the one-way valve 100 refers to the above embodiments. Since the one-way valve 100 adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0036] See also Figure 7 The present invention further proposes a press-fitting jig 200, which is used for processing the valve core 12, and includes: a frame and a press-fitting assembly, wherein the frame includes a seat body 210, a mounting platform 220 and a plurality of guide rods 230, the seat body 210 is provided with a mounting position for arranging the valve core 12, the seat body 210 is provided with a plurality of guide holes 211 around the mounting position, the mounting platform 220 is located above the seat body 210, and the top ends of the plurality of guide rods 230 are provided with a plurality of guide holes 211. It is fixed to the mounting platform 220, and its bottom end is slidably connected to the corresponding guide hole 211; the press-fitting assembly includes a first-level expanding ejector pin 241 and a flat pressing ejector pin 243, and the first-level expanding ejector pin 241 and the flat pressing ejector pin 243 are switchably mounted on the mounting platform 220, the first-level expanding ejector pin 241 is provided with a tapered end to expand the port of the fixed sleeve 1212, and the flat pressing ejector pin 243 is provided with a flat pressing end to flatten the expanded port of the fixed sleeve 1212.

[0037] When the valve core 12 is processed by the press-fitting jig 200 , the port of the fixed sleeve 1212 can be expanded by the primary expansion ejector pin 241 , and then the expanded port of the fixed sleeve 1212 can be flattened by the flattening ejector pin 243 , thereby forming a press-fit portion 1213 .

[0038] Furthermore, in some embodiments of the present invention, the press-fitting jig 200 further includes an elastic member 244 and a pressing plate 245, wherein the upper end of the elastic member 244 is connected to the bottom surface of the mounting platform 220, and the lower end of the elastic member 244 is connected to the pressing plate 245, and the bottom surface of the pressing plate 245 is used to press the annular gland 1221. In this way, the fixing member 122 is pressed by the elastic member 244 and the pressing plate 245, so that the fixing member 122 presses the annular gasket 123, eliminates the gap between the annular gasket 123 and the fixing member 122 and the disc body 1211, and makes the annular gasket 123 have a certain amount of compression, so that the valve core 12 has a higher compactness after assembly.

[0039] Due to the presence of the elastic member 244 and the pressure plate 245, when the valve core 12 is installed on the installation position, the elastic member 244 needs to be compressed so that the interval between the pressure plate 245 and the installation position becomes larger to facilitate the installation of the valve core 12. The pressure plate 245 can be directly lifted manually or in other ways. In some embodiments of the present invention, the press-fitting fixture 200 also includes a plurality of pressure-adjusting bolts 247, the mounting platform 220 is provided with a plurality of sliding holes 221, and the pressure plate 245 is provided with a plurality of threaded holes. The pressure regulating bolt 247 includes a head 2471 and a rod 2472 connected to each other. The end of the rod 2472 away from the head 2471 is provided with a thread and is threadedly connected to the corresponding threaded hole. The end of the rod 2472 close to the head 2471 is slidably connected to the corresponding sliding hole 221. The head 2471 is limited to the side of the sliding hole 221 opposite to the pressure plate 245, and the elastic member 244 is pressed between the mounting platform 220 and the pressure plate 245. The top of the rod body 2472 of the pressure-adjusting bolt 247 is slidably connected to the mounting platform 220, and the bottom of the rod body 2472 is threadedly connected to the pressure plate 245. The head 2471 of the pressure-adjusting bolt 247 is limited to the side of the mounting platform 220 away from the pressure plate 245. With this arrangement, the compression amount of the elastic member 244 can be changed by screwing the pressure-adjusting bolt 247, so that the interval between the pressure plate 245 and the mounting position is increased. After installing the valve core 12, the pressure-adjusting nut is rotated in the opposite direction so that the pressure plate 245 presses against the fixing member 122. At this time, the pressure between the pressure plate 245 and the fixing member 122 can be adjusted by adjusting the pressure-adjusting nut, so that the compactness of the valve core 12 is close to the expected.

[0040] Furthermore, in some embodiments of the present invention, the press-fitting jig 200 further includes a secondary expansion ejector pin 242, which is switchably mounted on the mounting platform 220 together with the primary expansion ejector pin 241 and the flattening ejector pin 243, and the tapered end slope of the secondary expansion ejector pin 242 is greater than the tapered end slope of the primary expansion ejector pin 241. In this way, the port of the fixed sleeve 1212 can be initially and further expanded by the primary expansion ejector pin 241 and the secondary expansion ejector pin 242 in sequence, and finally flattened by the flattening ejector pin 243, so that the fixed sleeve 1212 can be prevented from generating a large axial pressure when being pushed by the expansion ejector pin, causing the port to generate more axial deformation, thereby causing the folding effect to deviate from expectations.

[0041] The present invention also provides a method for manufacturing a valve core 12, which is used to manufacture the valve core 12, comprising the following steps: S1, put the annular gasket 123 and the fixing member 122 onto the fixed sleeve 1212 to be processed, with the port of the fixed sleeve 1212 facing upward, and place the valve core 12 on a horizontal processing table; S2, inserting the tapered end of the primary flaring ejector 241 into the port of the fixed sleeve 1212, and applying a linearly increasing axial downward pressure to the primary flaring ejector 241, until the outward expansion angle of the end of the fixed sleeve 1212 is equal to the inclination of the tapered end of the primary flaring ejector 241, and then taking out the primary flaring ejector 241; S3, inserting the end of the secondary expansion ejector 242 into the port of the fixed sleeve 1212, wherein the slope of the tapered end of the secondary expansion ejector 242 is greater than the slope of the tapered end of the primary expansion ejector 241, applying a linearly increasing axial downward pressure to the secondary expansion ejector 242 until the outward expansion angle of the end of the fixed sleeve 1212 is equal to the slope of the tapered end of the secondary expansion ejector 242, and then taking out the secondary expansion ejector 242; S4, pressing a flat surface of the flattening and expanding ejector pin against the expanded port of the fixed sleeve 1212, applying a linearly increasing axial downward pressure to the flattening and expanding ejector pin until the end of the fixed sleeve 1212 is folded to form the pressing portion 1213.

[0042] The manufacturing method can be implemented by the above-mentioned press-fitting jig 200. Specifically, when processing the valve core 12 in the present application, the valve core 12 can be initially assembled and then placed on the mounting table 220 (i.e., the horizontal processing table surface) of the press-fitting jig 200, and then the subsequent steps of the manufacturing method are performed.

[0043] The slope of the tapered end of the primary expansion ejector 241 and the secondary expansion ejector 242 is set according to the specific situation. Preferably, in some embodiments of the present invention, the slope of the tapered end of the primary expansion ejector 241 is greater than or equal to 30 degrees and less than or equal to 50 degrees, and can be specifically 30 degrees, 35 degrees, 40 degrees, 45 degrees, 50 degrees, etc.; the slope of the tapered end of the secondary expansion ejector 242 is greater than or equal to 60 degrees and less than or equal to 80 degrees, and can be specifically 60 degrees, 65 degrees, 70 degrees, 75 degrees, 80 degrees, etc.

[0044] In some embodiments of the present invention, a positioning rib 1215 is protruded from the outer periphery of the fixing member 122 on one side surface of the disk body 1211 of the valve core 12. The positioning rib 1215 is annular and is used to press the annular gasket 123 to prevent the annular gasket 123 from being easily misplaced.

[0045] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve core, applied to a one-way valve, characterized in that: include: A base plate, comprising a plate body and a fixing sleeve, wherein the fixing sleeve is connected to the center of one side of the plate body; A fixing member, the fixing member comprises an annular gland and a fixing ring, the inner ring of the annular gland is connected to the outer ring of the fixing ring, the fixing ring is sleeved outside the fixing sleeve, and the annular gland is spaced apart from the disc body; The end of the fixing sleeve away from the disc body is folded outward to form a pressing portion, and the pressing portion is pressed against a side of the fixing ring away from the disc body; as well as An annular gasket is sleeved outside the fixing ring and clamped between the annular gland and the disc body.

2. The valve core according to claim 1, characterized in that: The disc body and the fixing sleeve are integrally formed, and the wall thickness of the fixing sleeve is arranged to decrease in a direction away from the disc body.

3. The valve core according to claim 2, characterized in that: The inner wall of the fixed sleeve at one end away from the disc body is configured as a tapered surface, and the included angle between the generatrix of the tapered surface and the axis is greater than or equal to 15 degrees and less than or equal to 25 degrees.

4. The valve core according to claim 2, characterized in that: The ratio of the wall thickness of the end of the fixing sleeve away from the disc body to the inner diameter of the end of the fixing sleeve close to the disc body is greater than or equal to 1 / 40 and less than or equal to 1 / 50; The wall thickness of the end of the fixing sleeve away from the disc body is not less than 0.2 mm; and / or, The ratio of the width of the pressing portion to the axial thickness of the fixing piece is greater than or equal to 1 / 4 and less than or equal to 1 / 6.

5. A press-fitting jig, used for processing the valve core according to any one of claims 1 to 4, characterized in that: include: A frame, the frame comprising a seat body, a mounting platform and a plurality of guide rods, the seat body being provided with a mounting position for placing the valve core, the seat body being provided with a plurality of guide holes around the mounting position, the mounting platform being located above the seat body, the top ends of the plurality of guide rods being fixed to the mounting platform, and the bottom ends being slidably connected to the corresponding guide holes; The press-fitting assembly includes a primary expansion ejector pin and a flat pressing ejector pin, wherein the primary expansion ejector pin and the flat pressing ejector pin are switchably mounted on the mounting platform, the primary expansion ejector pin is provided with a tapered end to expand the port of the fixed sleeve, and the flat pressing ejector pin is provided with a flat pressing end to flatten the expanded port of the fixed sleeve.

6. The press-fitting jig according to claim 5, characterized in that: The press-fitting fixture further comprises an elastic member and a pressing plate, wherein the upper end of the elastic member is connected to the bottom surface of the mounting platform, the lower end of the elastic member is connected to the pressing plate, and the bottom surface of the pressing plate is used to press the annular pressure cover.

7. The press-fitting jig according to claim 6, characterized in that: The press-fitting fixture further comprises a plurality of pressure-adjusting bolts, the mounting platform is provided with a plurality of sliding holes, and the pressing plate is provided with a plurality of threaded holes; The pressure-adjusting bolt includes a head and a rod body connected to each other, an end of the rod body away from the head is provided with a thread and is threadedly connected to the corresponding threaded hole, an end of the rod body close to the head is slidably connected to the corresponding sliding hole, the head is limited to a side of the sliding hole opposite to the pressure plate, and the elastic member is pressed between the mounting platform and the pressure plate.

8. The press-fitting jig according to claim 5, characterized in that: The press-fitting fixture further includes a secondary flaring ejector pin, which is switchably mounted on the mounting platform together with the primary flaring ejector pin and the flat pressing ejector pin, and the inclination of the tapered end of the secondary flaring ejector pin is greater than the inclination of the tapered end of the primary flaring ejector pin.

9. A method for manufacturing a valve core, used for manufacturing the valve core as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Put the annular gasket and the fixing piece onto the fixed sleeve to be processed, with the port of the fixed sleeve facing upward, and place the valve core on a horizontal processing table; Insert the conical end of the primary flaring ejector pin into the port of the fixed sleeve, and apply a linearly increasing axial downward pressure to the primary flaring ejector pin until the outward expansion angle of the end of the fixed sleeve is equal to the inclination of the conical end of the primary flaring ejector pin, and then remove the primary flaring ejector pin; Insert the end of the secondary flaring ejector pin into the port of the fixed sleeve, wherein the slope of the tapered end of the secondary flaring ejector pin is greater than the slope of the tapered end of the primary flaring ejector pin, apply a linearly increasing axial downward pressure to the secondary flaring ejector pin until the outward expansion angle of the end of the fixed sleeve is equal to the slope of the tapered end of the secondary flaring ejector pin, and then take out the secondary flaring ejector pin; A flat surface of the flattening and expanding ejector pin is pressed against the expanded port of the fixed sleeve, and a linearly increasing axial downward pressure is applied to the flattening and expanding ejector pin until the end of the fixed sleeve is folded to form the pressing portion.

10. A one-way valve, characterized in that: It comprises a valve body, a positioning structure, a pressure-applying structure and a valve core as claimed in any one of claims 1 to 4; wherein, A fluid channel is provided in the valve body, a stop flange and a plurality of guide parts are convexly provided on the wall surface of the fluid channel, and one end of the plurality of guide parts is connected to one side of the stop flange; A positioning structure, wherein the positioning structure is provided with a flow hole, the periphery of the positioning structure is connected to the wall surface of the fluid channel, and is located at an end of the guide portion away from the stop flange; The outer periphery of the base plate is slidably matched with the plurality of guide parts; The pressure-applying structure is installed between the base plate and the positioning structure under pressure, and has a tendency to stretch along the extending direction of the fluid channel so that one side edge of the annular gasket abuts against the stop flange.

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