CN115992888A - Flow regulating valve and manufacturing method - Google Patents

Abstract

The invention provides a flow regulating valve and a manufacturing method, wherein the flow regulating valve comprises: the main valve seat is internally provided with a containing cavity; the auxiliary valve seat is provided with a first mounting groove, the auxiliary valve seat is in interference fit with the main valve seat, and the interference between the auxiliary valve seat and the main valve seat is a, wherein a is less than or equal to 0.04mm; the sealing gasket is arranged in the first mounting groove, the inner diameter of the sealing gasket is D1, the inner diameter of the first mounting groove is D2, D1-D2 is less than or equal to 0.04mm, the sealing gasket is provided with a valve port between the sealing gasket and the first mounting groove, and the valve port is communicated with the accommodating cavity. By the technical scheme provided by the invention, the coaxiality among the main valve seat, the auxiliary valve seat and the sealing gasket can be improved, so that the reliability of the valve port position is ensured, and the performance and reliability of the flow regulating valve are improved.

Description

Flow regulating valve and manufacturing method

Technical Field

The invention relates to the technical field of flow regulating valves, in particular to a flow regulating valve and a manufacturing method thereof.

Background

In the flow control valve in the prior art, a sealing gasket is usually arranged on an auxiliary valve seat, and a valve port is arranged on the sealing gasket, however, the sealing gasket is in a sealing gasket sealing mode, the condition that the installation position of the sealing gasket is inaccurate possibly occurs, and further the installation position of the valve port on the sealing gasket is deviated, so that the sealing effect of the flow control valve is affected.

Disclosure of Invention

The invention provides a flow regulating valve and a manufacturing method thereof, which are used for improving the installation precision of a valve port in the flow regulating valve.

In order to achieve the above object, according to one aspect of the present invention, there is provided a flow rate regulating valve comprising: the main valve seat is internally provided with a containing cavity; the auxiliary valve seat is provided with a first mounting groove, the auxiliary valve seat is in interference fit with the main valve seat, and the interference between the auxiliary valve seat and the main valve seat is a, wherein a is less than or equal to 0.04mm; the sealing gasket is arranged in the first mounting groove, the outer diameter of the sealing gasket is D1, the inner diameter of the first mounting groove is D2, D1-D2 is less than or equal to 0.04mm, the sealing gasket is provided with a valve port, and the valve port is communicated with the accommodating cavity.

Further, the flow regulating valve further comprises a valve head which is movably arranged in the accommodating cavity to block or open the valve port, and a gap b is formed between the outer side wall of the valve head and the inner side wall of the accommodating cavity, wherein b is more than or equal to 0.01mm and less than or equal to 0.04mm.

Further, the flow regulating valve further comprises a valve needle structure and a nut, the valve needle structure comprises a screw, the valve head is sleeved at one end of the screw, the screw penetrates through the nut, the nut is provided with an assembly hole, and a gap c is reserved between the outer side wall of the screw and the inner side wall of the assembly hole, and is more than or equal to 0.01mm and less than or equal to 0.04mm.

Further, the main valve seat comprises a main valve body and a limiting section which are connected with each other, the cavity bodies of the main valve body and the limiting section form a containing cavity together, the nut is provided with a first barrel and a second barrel which are connected with each other, the radial size of the second barrel is larger than that of the first barrel, the assembly hole is positioned in the first barrel, the second barrel is sleeved on the limiting section, the inner diameter of the second barrel is D3, the outer diameter of the limiting section is D4, and the D3-D4 is less than or equal to 0.04mm.

Further, the accommodating cavity comprises a limiting hole section, a guide hole section and a valve cavity which are communicated in sequence, the cavity of the limiting section forms the limiting hole section, the guide hole section and the valve cavity are located in the main valve body, the outer side wall of the valve head is in limiting fit with the inner side wall of the guide hole section, the valve port is communicated with the valve cavity, and the main valve seat is of an integrated structure.

Further, the screw comprises a first rod section, a second rod section and a third rod section which are sequentially connected and sequentially increased in radial dimension, and the outer side wall of the third rod section is in limit fit with the inner side wall of the limit hole section; the valve needle structure further comprises a bushing, a bearing and a pressing sleeve, wherein the bushing is sleeved on the first rod section and fixedly connected with the first rod section; the bearing sleeve is arranged on the second rod section, and two ends of the inner ring of the bearing are respectively abutted with the end face of the third rod section and the end face of the bushing; the pressing sleeve is fixedly connected with the cavity of the valve head, and one end of the pressing sleeve is abutted with the end face, facing the third rod section, of the outer ring of the bearing.

Further, the screw has a first balance hole, the valve head has a second balance hole, the nut has a third balance hole, the first balance hole communicates with the second balance hole and the third balance hole, respectively, and the second balance hole communicates with the accommodation chamber.

Further, the flow areas of the first balance hole, the second balance hole and the third balance hole are S1, the accommodating cavity comprises a limiting hole section, the outer side wall of the screw is in limiting fit with the inner side wall of the limiting hole section, and the flow area of the area between the outer side wall of the screw and the inner side wall of the limiting hole section is S2, wherein S2 is more than or equal to S1.

Further, the valve head is including the direction head that connects gradually, the body of rod and sealing head, and the radial dimension of the body of rod is less than the radial dimension of direction head, sealing head, and the lateral wall of direction head and the inside wall clearance fit who holds the chamber, and sealing head is used for shutoff valve port, and the lateral wall of direction head has the ring channel, and flow control valve still has ring seal, and ring seal sets up in the ring channel, and ring seal's outer lane holds the inside wall sealing fit in chamber.

Further, the side wall of the main valve seat is provided with a flow hole, the flow hole is communicated with the accommodating cavity, the auxiliary valve seat is further provided with a second mounting groove, the second mounting groove is communicated with the valve port, the flow regulating valve further comprises a first connecting pipe and a second connecting pipe, one end of the first connecting pipe is arranged in the flow hole in a penetrating mode, and the other end of the second connecting pipe is arranged in the second mounting groove in a penetrating mode.

Further, assist the disk seat including interconnect assist the valve body and set up the annular boss on assisting the valve body, assist the disk seat still have the turn-ups structure, turn-ups structure and annular boss are connected, and the turn-ups structure is annular structure, turn-ups structure and sealed spacing cooperation of filling up.

According to another aspect of the present invention, there is provided a manufacturing method for manufacturing the flow rate regulating valve described above, the manufacturing method including: s10: connecting the first connecting pipe with the main valve seat; s20: connecting the valve needle structure with the valve head; s30: penetrating the assembled structure in the step S20 into a main valve seat, wherein a guide section of the valve head is arranged in a wire guide section of the main valve seat; s40: screwing the nut onto the screw rod of the valve needle structure; s50: pressing the nut onto the main valve seat and welding with the main valve seat; s60: connecting the second connecting pipe with the auxiliary valve seat; s70: the auxiliary valve seat is connected with the main valve seat.

By applying the technical scheme of the invention, the invention provides a flow regulating valve, which comprises the following components: the main valve seat is internally provided with a containing cavity; the auxiliary valve seat is provided with a first mounting groove, the auxiliary valve seat is in interference fit with the main valve seat, and the interference between the auxiliary valve seat and the main valve seat is a, wherein a is less than or equal to 0.04mm; the sealing gasket is arranged in the first mounting groove, the outer diameter of the sealing gasket is D1, the inner diameter of the first mounting groove is D2, D1-D2 is less than or equal to 0.04mm, the sealing gasket is provided with a valve port, and the valve port is communicated with the accommodating cavity; the valve head is movably arranged in the accommodating cavity so as to block or open the valve port, the outer side wall of the valve head is in clearance fit with the inner side wall of the accommodating cavity, and the clearance is b which is more than or equal to 0.02mm and less than or equal to 0.08mm. By adopting the scheme, the coaxiality between the main valve seat and the auxiliary valve seat is improved by limiting the interference magnitude a, and the coaxiality between the sealing gasket and the auxiliary valve seat is improved by limiting the relation between D1 and D2, so that the coaxiality between the valve port and the auxiliary valve seat is improved, and the reliability of the valve port position is improved. Through the combined action of the two groups of limiting relations, the installation precision among the auxiliary valve seat, the sealing gasket and the main valve seat is improved, the position of the valve port is ensured not to deviate, and the tightness of the flow regulating valve is ensured.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 shows a schematic structural view of a flow regulating valve provided by an embodiment of the present invention;

FIG. 2 shows a schematic structural view of a main valve seat in the flow regulating valve of FIG. 1;

FIG. 3 shows a schematic structural view of an auxiliary valve seat in the flow regulating valve of FIG. 1;

FIG. 4 shows a schematic assembly view of the valve needle structure and valve head of the flow regulating valve of FIG. 1;

FIG. 5 shows a schematic structural view of a nut in the flow regulating valve of FIG. 1;

fig. 6 shows a schematic structural view of a gasket in the flow rate regulating valve of fig. 1.

Wherein the above figures include the following reference numerals:

10. a main valve seat; 11. a receiving chamber; 111. limiting hole sections; 112. a pilot hole section; 113. a valve cavity; 12. a main valve body; 13. a limiting section; 14. a flow hole;

20. an auxiliary valve seat; 21. a first mounting groove; 22. a second mounting groove; 23. an auxiliary valve body; 24. an annular boss; 25. a flanging structure; 26. a connection hole;

30. a sealing gasket; 31. a valve port; 311. a deflector aperture section; 312. sealing the hole section; 313. an overflow aperture section;

40. a valve head; 41. a second balance hole; 42. a guide head; 43. a rod body; 44. a sealing head; 45. an annular groove;

50. a valve needle structure; 51. a screw; 511. a first pole segment; 512. a second pole segment; 513. a third pole segment; 514. a first balance hole; 515. a fourth pole segment; 516. a fifth pole segment; 52. a bushing; 53. a bearing; 54. pressing the sleeve;

60. a nut; 61. a fitting hole; 62. a first cylinder; 621. assembling the barrel section; 622. a connecting barrel section; 63. a second cylinder;

70. an annular seal ring;

81. a first connection pipe; 82. a second connection pipe;

90. a valve cylinder; 91. sealing the cavity.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 6, an embodiment of the present invention provides a flow rate regulating valve including: a main valve seat 10, the main valve seat 10 having an accommodating chamber 11 therein; the auxiliary valve seat 20 is provided with a first mounting groove 21, the auxiliary valve seat 20 is in interference fit with the main valve seat 10, and the interference between the auxiliary valve seat 20 and the main valve seat 10 is a, wherein a is less than or equal to 0.04mm; the sealing gasket 30, the sealing gasket 30 is arranged in the first mounting groove 21, the inner diameter of the sealing gasket 30 is D1, the inner diameter of the first mounting groove 21 is D2, |D1-D2| is less than or equal to 0.04mm, the sealing gasket 30 is provided with a valve port 31, and the valve port 31 is communicated with the accommodating cavity 11.

In this embodiment, the limitation of the interference magnitude a improves the coaxiality between the main valve seat 10 and the auxiliary valve seat 20, and the limitation of the relationship between D1 and D2 improves the coaxiality between the sealing gasket 30 and the auxiliary valve seat 20, and further improves the coaxiality between the valve port 31 and the auxiliary valve seat 20, and improves the reliability of the position of the valve port 31. By the combined action of the two groups of limiting relations, the installation precision among the auxiliary valve seat 20, the sealing gasket 30 and the main valve seat 10 is improved, the position of the valve port 31 is ensured not to deviate, and the tightness of the flow regulating valve is ensured.

Specifically, the clearance b between the outer side wall of the valve head 40 and the inner side wall of the housing chamber 11 is taken as a single-sided clearance.

Further, the flow regulating valve further comprises a valve head 40, the valve head 40 is movably arranged in the accommodating cavity 11 to block or open the valve port 31, and a gap b is formed between the outer side wall of the valve head 40 and the inner side wall of the accommodating cavity 11, wherein b is more than or equal to 0.01mm and less than or equal to 0.04mm.

In this embodiment, through the limitation of the clearance b, the coaxiality between the valve head 40 and the main valve seat 10 is improved, and the limitation of the interference a and the limitation of the relation between D1 and D2 are combined, so that the coaxiality between the valve port 31 and the valve head 40 is finally improved, the integrity of the sealing surface formed by the valve head 40 and the valve port 31 is ensured and the leakage is not easy to occur when the valve head 40 is in a blocking state, and meanwhile, the situation that the valve head 40 is not blocked in the moving process is also ensured, and the performance and the reliability of the flow regulating valve are improved.

As shown in fig. 1, the flow regulating valve further comprises a valve needle structure 50 and a nut 60, wherein the valve needle structure 50 comprises a screw rod 51, the valve head 40 is sleeved at one end of the screw rod 51, the screw rod 51 is arranged through the nut 60, the nut 60 is provided with an assembly hole 61, and a gap c is formed between the outer side wall of the screw rod 51 and the inner side wall of the assembly hole 61, and is more than or equal to 0.01mm and less than or equal to 0.04mm. By limiting the value range of the clearance c, the coaxiality between the valve needle structure 50 and the nut 60 is improved, the coaxiality between the valve head 40 and the nut 60 is further improved, and the performance of the flow regulating valve is improved.

Specifically, the clearance c between the outer side wall of the screw 51 and the inner side wall of the fitting hole 61 is taken as a one-sided clearance.

As shown in fig. 1 and 2, the main valve seat 10 comprises a main valve body 12 and a limiting section 13 which are connected with each other, the cavities of the main valve body 12 and the limiting section 13 jointly form a containing cavity 11, the nut 60 is provided with a first cylinder 62 and a second cylinder 63 which are connected with each other, the radial dimension of the second cylinder 63 is larger than that of the first cylinder 62, the assembly hole 61 is positioned in the first cylinder 62, the second cylinder 63 is sleeved on the limiting section 13, the inner diameter of the second cylinder 63 is D3, and the outer diameter of the limiting section 13 is D4, |d3-d4| is less than or equal to 0.04mm.

In the present embodiment, by limiting the dimensional relationship between D3 and D4, the coaxiality between the nut 60 and the main valve seat 10 is improved, and by combining the limitation of the range of the clearance c, the coaxiality between the valve head 40 and the main valve seat 10 is further improved, and the reliability of the movement of the valve head 40 is ensured.

Specifically, the accommodating cavity 11 includes a limiting hole section 111, a guiding hole section 112 and a valve cavity 113 which are sequentially communicated, the cavity of the limiting section 13 forms the limiting hole section 111, the guiding hole section 112 and the valve cavity 113 are located in the main valve body 12, the outer side wall of the valve head 40 is in limiting fit with the inner side wall of the guiding hole section 112, the valve port 31 is communicated with the valve cavity 113, and the main valve seat 10 is of an integrated structure.

In this embodiment, the main valve seat 10 is an integrally formed structure, so that coaxiality among the limiting hole section 111, the guiding hole section 112 and the valve cavity 113 in the accommodating cavity 11 is ensured, and in addition, coaxiality among the main valve body 12 and the limiting section 13 is ensured, coaxiality among the nut 60, the main valve seat 10, the valve needle structure 50 and the valve head 40 is further ensured, reliability of movement of the valve head 40 is ensured, and performance of the flow regulating valve is improved.

As shown in fig. 4, the screw 51 includes a first rod section 511, a second rod section 512 and a third rod section 513 which are sequentially connected and sequentially increase in radial dimension, and an outer side wall of the third rod section 513 is in limit fit with an inner side wall of the limit hole section 111; the valve needle structure 50 further comprises a bushing 52, a bearing 53 and a pressing sleeve 54, wherein the bushing 52 is sleeved on the first rod section 511 and is fixedly connected with the first rod section 511; the bearing 53 is sleeved on the second rod section 512, and two ends of the inner ring of the bearing 53 are respectively abutted with the end face of the third rod section 513 and the end face of the bushing 52; the pressing sleeve 54 is fixedly connected with the cavity of the valve head 40, and one end of the pressing sleeve 54 is abutted with the end face, facing the third rod section 513, of the outer ring of the bearing 53.

In this embodiment, the first rod section 511 is a mounting section of the bushing 52, and is in clearance, transition or interference fit with an inner hole of the bushing 52, one end of the bushing 52 is abutted against an inner ring of the bearing 53, and can be fixed with the screw 51 into a whole through welding, the second rod section 512 is a mounting section of the bearing 53, and is in clearance, transition or interference fit with the inner ring of the bearing 53, two ends of the inner ring of the bearing 53 are respectively abutted against an end face of the third rod section 513 and the bushing 52, so that axial limiting of the inner ring of the bearing 53 is realized through the bushing 52, deformation of the inner ring of the bearing 53 due to excessive stress in other limiting modes is avoided, reliability of the bearing 53 is ensured, and then the bearing 53 is further limited through abutting of the pressing sleeve 54 against an outer ring end face of the bearing 53, so that play of the bearing 53 is prevented, and performance of the flow regulating valve is improved.

Optionally, as shown in fig. 5, the first barrel 62 includes an assembling barrel section 621 and a connecting barrel section 622 that are connected to each other, the assembling hole 61 is located in the assembling barrel section 621, the inside diameter of the assembling barrel section 621 is smaller than the inside diameter of the connecting barrel section 622, the hole in the assembling barrel section 621 is the assembling hole 61, the connecting barrel section 622 has internal threads therein, the screw 51 further includes a fourth rod section 515 and a fifth rod section 516 that are sequentially connected to the third rod section 513, the radial dimension of the fourth rod section 515 is larger than the radial dimension of the fifth rod section 516, the fourth rod section 515 has external threads, the fourth rod section 515 is in threaded connection with the connecting barrel section 622, the fifth rod section 516 and the assembling barrel section 621 are in clearance fit, and the length of the connecting barrel section 622 is longer than the moving distance of the valve head 40 from the valve closing state to the valve opening state, so that the valve opening and the valve closing reliability of the flow regulating valve are ensured.

Further, the screw 51 has a first balance hole 514, the valve head 40 has a second balance hole 41, the nut 60 has a third balance hole, the first balance hole 514 communicates with the second balance hole 41, the third balance hole, respectively, and the second balance hole 41 communicates with the accommodation chamber 11.

In this embodiment, the first balance hole 514, the second balance hole 41 and the third balance hole are provided to realize the adjustment of the pressure in the cavity of the flow control valve, so that the pressure balance of each part in the flow control valve is realized, and the reliability of the opening and closing of the flow control valve is further ensured.

Specifically, the flow regulating valve further comprises a valve barrel 90, one end of the valve barrel 90 is connected with the main valve seat 10, the nut 60 is fixedly arranged in the valve barrel 90, the matched part of the screw rod 51 and the nut 60 is located in the cavity of the valve barrel 90, the cavity of the valve barrel 90 is a sealing cavity 91, the sealing cavity 91 is communicated with the accommodating cavity 11 through a third balance hole, and thus, the pressure balance between the accommodating cavity 11 and the sealing cavity 91 is realized through the combined action of the first balance hole 514, the second balance hole 41 and the third balance hole, and the reliability of opening and closing the valve of the flow regulating valve is ensured.

Further, the flow areas of the first balance hole 514, the second balance hole 41 and the third balance hole are all S1, the accommodating cavity 11 comprises a limiting hole section 111, the outer side wall of the screw 51 is in limiting fit with the inner side wall of the limiting hole section 111, the flow area of the area between the outer side wall of the screw 51 and the inner side wall of the limiting hole section 111 is S2, and S2 is more than or equal to S1.

In the present embodiment, the first balance hole 514 and the second balance hole 41 are located in the accommodating chamber, the third balance hole is located in the sealing chamber 91, the accommodating chamber 11 and the sealing chamber 91 are communicated through a gap between the screw 51 and the limiting hole section 111, and pressure balance of each position in the accommodating chamber 11 and the sealing chamber 91 is achieved through the combined action of the gap and the three balance holes. The flow areas of the first balance hole 514, the second balance hole 41 and the third balance hole are equal and are S1, the flow rate and the flow velocity of fluid flowing through the three balance holes are identical, the pressure balance efficiency is improved, the flow area S2 of the area between the screw rod 51 and the limiting hole section 111 is larger than S1, the flow passing through the flow area S2 is larger than the flow passing through the flow area S1, the situation that the pressure balance is slow due to the fact that the fluid flow is blocked due to the fact that the flow passing through the flow area S1 is different from the flow passing through the flow area S2 is avoided, and then the valve opening or closing condition of a flow regulating valve is affected is avoided.

As shown in fig. 4, the valve head 40 includes a guiding head 42, a rod body 43 and a sealing head 44 which are sequentially connected, the radial dimension of the rod body 43 is smaller than that of the guiding head 42 and the sealing head 44, the outer side wall of the guiding head 42 is in clearance fit with the inner side wall of the accommodating cavity 11, the sealing head 44 is used for sealing the valve port 31, the outer side wall of the guiding head 42 is provided with an annular groove 45, the flow regulating valve is also provided with an annular sealing ring 70, the annular sealing ring 70 is arranged in the annular groove 45, and the outer ring of the annular sealing ring 70 is in sealing fit with the inner side wall of the accommodating cavity 11.

In the present embodiment, by the clearance fit of the guide head 42 and the accommodation chamber 11, it is ensured that the valve head 40 does not deviate during the movement, thereby ensuring the reliability of the movement of the valve head 40; the annular seal ring 70 is arranged in the annular groove 45 of the outer side wall of the guide head 42, so that the fluid in the accommodating cavity 11 can be prevented from entering the sealing cavity 91 of the valve barrel 90 through the gap between the outer side wall of the guide head 42 and the inner side wall of the accommodating cavity 11, and the reliability of the flow regulating valve is ensured.

Alternatively, as shown in fig. 6, the outer side wall of the guide head 42 is in clearance fit with the inner side wall of the guide hole section 112 in the accommodating cavity 11, the valve port 31 includes a guide hole section 311, a seal hole section 312 and an overflow hole section 313 which are sequentially communicated and have sequentially reduced radial dimensions, the radial dimensions of the guide hole section 311 gradually decrease in the direction of the seal hole section 312 toward the overflow hole section 313, the radial dimensions of the seal hole section 312 gradually decrease in the direction of the seal hole section 312 toward the overflow hole section 313, and the seal head 44 is attached to the seal hole section 312 to form a sealing surface in a state where the valve port is closed, thereby closing the valve port.

As shown in fig. 1 to 3, the side wall of the main valve seat 10 is provided with a flow hole 14, the flow hole 14 communicates with the accommodation chamber 11, the auxiliary valve seat 20 further has a second mounting groove 22, the second mounting groove 22 communicates with the valve port 31, the flow regulating valve further includes a first connection pipe 81 and a second connection pipe 82, one end of the first connection pipe 81 is inserted into the flow hole 14, and the other end of the second connection pipe 82 is inserted into the second mounting groove 22.

In the present embodiment, the fluid flows from the first connection pipe 81 into the valve chamber 113 of the accommodating chamber 11, flows into the second connection pipe 82 through the valve port 31 communicating with the valve chamber 113, and finally flows out from the second connection pipe 82. Specifically, the flow hole 14 is provided on the inner side wall of the valve chamber 113, and the axes of the first adapter tube 81 and the second adapter tube 82 are disposed vertically. By the arrangement, the flow capacity of the fluid can be improved, and the performance of the flow regulating valve can be improved.

Optionally, the auxiliary valve seat further has a connection hole 26, the valve port 31, the connection hole 26 and the second connection pipe 82 are sequentially communicated, the connection hole 26 is located between the first installation groove 21 and the second installation groove 22, the radial dimension of the connection hole 26 is smaller than that of the first installation groove 21 and the second installation groove 22, a first plane is formed between the connection hole 26 and the first installation groove 21, the diameter of the connection hole 26 and the diameter of the second installation groove 22 form a second plane, the sealing gasket 30 installed in the first installation groove 21 is abutted to the first plane, the second connection pipe 82 installed in the second installation groove 22 is abutted to the second plane, and thus the depth of the sealing gasket 30 installed in the auxiliary valve seat 20 and the depth of the second connection pipe 82 inserted into the auxiliary valve seat 20 are limited, interference between the sealing gasket 30 and the second connection pipe 82 in the installation process is prevented, and stability and reliability of the flow regulating valve are ensured.

As shown in fig. 3, the auxiliary valve seat 20 includes an auxiliary valve body 23 and an annular boss 24 disposed on the auxiliary valve body 23, the auxiliary valve seat 20 further has a flange structure 25, the flange structure 25 is connected with the annular boss 24, the flange structure 25 is an annular structure, and the flange structure 25 is in limit fit with the sealing gasket 30.

In this embodiment, the sealing gasket 30 is fixed in the auxiliary valve body 23 and the annular boss 24 through the flanging structure 25, so that the sealing gasket 30 is prevented from shaking and rotating in the auxiliary valve seat 20, and meanwhile, the sealing gasket 30 is prevented from being deformed due to larger radial force, and the sealing gasket 30 is arranged without limiting the main valve seat 10, so that the wall thickness of the main valve seat 10 can be made thinner, and the flanging mode is adopted to facilitate assembly operation, thereby reducing the cost of the flow regulating valve.

Another embodiment of the present invention provides a manufacturing method for manufacturing the flow rate regulating valve described above, including: s10: connecting the first adapter tube 81 with the main valve seat 10; s20: connecting the valve needle structure 50 with the valve head 40; s30: penetrating the assembled structure of S20 into the main valve seat 10, wherein the guiding section of the valve head 40 is mounted in the wire guide section of the main valve seat 10; s40: screwing the nut 60 onto the screw 51 of the needle structure 50; s50: press fitting the nut 60 to the main valve seat 10 and welding with the main valve seat 10; s60: connecting the second nipple 82 with the auxiliary valve seat 20; s70: the auxiliary valve seat 20 and the main valve seat 10 are connected. The arrangement ensures the reliability and smoothness of installation, avoids the interference of each part in the flow regulating valve in the installation process, and ensures the reliability of the flow regulating valve.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. A flow regulating valve, comprising:

a main valve seat (10), wherein a containing cavity (11) is arranged in the main valve seat (10);

the auxiliary valve seat (20) is provided with a first mounting groove (21), the auxiliary valve seat (20) is in interference fit with the main valve seat (10), and the interference between the auxiliary valve seat (20) and the main valve seat (10) is a, wherein a is less than or equal to 0.04mm;

the sealing gasket (30), the sealing gasket (30) is arranged in the first mounting groove (21), the outer diameter of the sealing gasket (30) is D1, the inner diameter of the first mounting groove (21) is D2, |D1-D2|is less than or equal to 0.04mm, the sealing gasket (30) is provided with a valve port (31), and the valve port (31) is communicated with the accommodating cavity (11).

2. The flow regulating valve according to claim 1, wherein,

the flow regulating valve further comprises a valve head (40), the valve head (40) is movably arranged in the accommodating cavity (11) to block or open the valve port (31), and a gap b is formed between the outer side wall of the valve head (40) and the inner side wall of the accommodating cavity (11), wherein b is more than or equal to 0.01mm and less than or equal to 0.04mm.

3. A flow regulating valve according to claim 2, wherein,

the flow regulating valve further comprises a valve needle structure (50) and a nut (60), the valve needle structure (50) comprises a screw rod (51), the valve head (40) is sleeved at one end of the screw rod (51), the screw rod (51) penetrates through the nut (60) to be arranged, the nut (60) is provided with an assembly hole (61), a gap c is reserved between the outer side wall of the screw rod (51) and the inner side wall of the assembly hole (61), and c is more than or equal to 0.01mm and less than or equal to 0.04mm.

4. A flow regulating valve according to claim 3, wherein,

main disk seat (10) are including interconnect's main valve body (12) and spacing section (13), main valve body (12) with the cavity of spacing section (13) constitutes jointly hold chamber (11), nut (60) have interconnect's first barrel (62) and second barrel (63), the radial dimension of second barrel (63) is greater than the radial dimension of first barrel (62), mounting hole (61) are located in first barrel (62), second barrel (63) cover is established on spacing section (13), the internal diameter of second barrel (63) is D3, the external diameter of spacing section (13) is D4, |D3-D4|is less than or equal to 0.04mm.

5. The flow regulating valve according to claim 4, wherein,

the accommodating cavity (11) comprises a limiting hole section (111), a guide hole section (112) and a valve cavity (113) which are sequentially communicated, the cavity of the limiting section (13) is formed into the limiting hole section (111), the guide hole section (112) and the valve cavity (113) are located in the main valve body (12), the outer side wall of the valve head (40) is in limiting fit with the inner side wall of the guide hole section (112), the valve port (31) is communicated with the valve cavity (113), and the main valve seat (10) is of an integrated structure.

6. The flow regulating valve according to claim 5, wherein,

the screw rod (51) comprises a first rod section (511), a second rod section (512) and a third rod section (513) which are sequentially connected and sequentially increased in radial size, and the outer side wall of the third rod section (513) is in limit fit with the inner side wall of the limit hole section (111); the valve needle structure (50) further comprises a bushing (52), a bearing (53) and a pressing sleeve (54), wherein the bushing (52) is sleeved on the first rod section (511) and is fixedly connected with the first rod section (511); the bearing (53) is sleeved on the second rod section (512), and two ends of the inner ring of the bearing (53) are respectively abutted against the end face of the third rod section (513) and the end face of the bushing (52); the pressing sleeve (54) is fixedly connected with the cavity of the valve head (40), and one end of the pressing sleeve (54) is abutted with the end face, facing the third rod section (513), of the bearing (53).

7. A flow regulating valve according to claim 3, wherein,

the screw (51) is provided with a first balance hole (514), the valve head (40) is provided with a second balance hole (41), the nut (60) is provided with a third balance hole, the first balance hole (514) is respectively communicated with the second balance hole (41) and the third balance hole, and the second balance hole (41) is communicated with the containing cavity (11).

8. The flow regulating valve according to claim 7, wherein,

the flow areas of the first balance hole (514), the second balance hole (41) and the third balance hole are S1, the accommodating cavity (11) comprises a limiting hole section (111), the outer side wall of the screw rod (51) is in limiting fit with the inner side wall of the limiting hole section (111), and the flow area of an area between the outer side wall of the screw rod (51) and the inner side wall of the limiting hole section (111) is S2, wherein S2 is more than or equal to S1.

9. A flow regulating valve according to claim 2, wherein,

the valve head (40) comprises a guide head (42), a rod body (43) and a sealing head (44) which are sequentially connected, the radial size of the rod body (43) is smaller than that of the guide head (42) and that of the sealing head (44), the outer side wall of the guide head (42) is in clearance fit with the inner side wall of the containing cavity (11), the sealing head (44) is used for sealing the valve port (31), the outer side wall of the guide head (42) is provided with an annular groove (45), the flow regulating valve is further provided with an annular sealing ring (70), the annular sealing ring (70) is arranged in the annular groove (45), and the outer ring of the annular sealing ring (70) is in sealing fit with the inner side wall of the containing cavity (11).

10. The flow regulating valve according to claim 1, wherein,

the side wall of main disk seat (10) is provided with circulation hole (14), circulation hole (14) with hold chamber (11) intercommunication, auxiliary disk seat (20) still have second mounting groove (22), second mounting groove (22) with valve port (31) intercommunication, the flow control valve still includes first takeover (81) and second takeover (82), the one end of first takeover (81) is worn to establish in circulation hole (14), the other end of second takeover (82) is worn to establish in second mounting groove (22).

11. The flow regulating valve according to claim 9, wherein,

the auxiliary valve seat (20) comprises an auxiliary valve body (23) and an annular boss (24) which are connected with each other, the auxiliary valve seat (20) is further provided with a flanging structure (25), the flanging structure (25) is connected with the annular boss (24), the flanging structure (25) is an annular structure, and the flanging structure (25) is in limit fit with the sealing gasket (30).

12. A manufacturing method for manufacturing the flow rate regulating valve according to any one of claims 1 to 11, characterized by comprising:

s10: connecting the first connection tube (81) with the main valve seat (10);

s20: connecting the valve needle structure (50) with the valve head (40);

s30: penetrating the assembled structure of S20 into a main valve seat (10), wherein a guiding section of the valve head (40) is mounted in a wire guide section of the main valve seat (10);

s40: screwing a nut (60) onto a screw (51) of the valve needle structure (50);

s50: -press fitting the nut (60) onto the main valve seat (10) and welding with the main valve seat (10);

s60: connecting the second connection tube (82) with the auxiliary valve seat (20);

s70: -connecting the auxiliary valve seat (20) with the main valve seat (10).

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