WO2023066115A1 - 阀头结构及具有其的流量调节阀 - Google Patents

阀头结构及具有其的流量调节阀 Download PDF

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Publication number
WO2023066115A1
WO2023066115A1 PCT/CN2022/124929 CN2022124929W WO2023066115A1 WO 2023066115 A1 WO2023066115 A1 WO 2023066115A1 CN 2022124929 W CN2022124929 W CN 2022124929W WO 2023066115 A1 WO2023066115 A1 WO 2023066115A1
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WO
WIPO (PCT)
Prior art keywords
valve
head
flow regulating
flow
sealing
Prior art date
Application number
PCT/CN2022/124929
Other languages
English (en)
French (fr)
Inventor
贺宇辰
刘乐强
朱方英
Original Assignee
浙江盾安人工环境股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202111222138.2A external-priority patent/CN115992892A/zh
Priority claimed from CN202122533129.7U external-priority patent/CN216200584U/zh
Priority claimed from CN202122533956.6U external-priority patent/CN216200588U/zh
Priority claimed from CN202111223524.3A external-priority patent/CN115992889A/zh
Priority claimed from CN202122533332.4U external-priority patent/CN216478963U/zh
Priority claimed from CN202122533820.5U external-priority patent/CN217177456U/zh
Priority claimed from CN202122533263.7U external-priority patent/CN216200586U/zh
Application filed by 浙江盾安人工环境股份有限公司 filed Critical 浙江盾安人工环境股份有限公司
Publication of WO2023066115A1 publication Critical patent/WO2023066115A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves

Definitions

  • the present application relates to the field of flow regulating valves, in particular, to a valve head structure and a flow regulating valve having the same.
  • the part of the valve head protruding into the valve cavity is usually a cylindrical structure.
  • valve head structure has a limited space inside the valve chamber and a large flow resistance in the valve chamber, resulting in Cv (that is, each The flow rate of the fluid passing through in minutes) is too small to meet the design requirements of the Cv value.
  • the main purpose of the present application is to provide a valve head structure and a flow regulating valve having the same, so as to solve the problem in the prior art that the setting of the valve head structure affects the fluid flow in the flow regulating valve.
  • a valve head structure which is arranged in the valve body of the flow regulating valve and used to close or avoid the valve port of the valve body.
  • the valve head structure includes: the valve head, the valve head It is movably arranged in the valve body; the accommodating groove is arranged on the valve head, and the accommodating groove is used to accommodate the fluid in the valve body; wherein, the distance between the valve head and the valve port is adjustable, and when the valve head moves to At the position where the distance from the valve port is the largest, at least part of the accommodation groove is located in the accommodation chamber of the valve body.
  • the accommodating groove is arranged around the valve head; and/or, the accommodating groove is an annular structure.
  • the receiving groove has a first transition section, and the first transition section is located at an end of the receiving groove away from the valve port; along the direction that the valve head approaches the valve port, the cross-sectional area of the first transition section decreases gradually.
  • valve head includes a sealing head for blocking the valve port, and the sealing head is arranged at an end of the receiving groove close to the valve port.
  • the accommodation groove has a second transition section, and the second transition section is located at one end of the accommodation groove close to the sealing head; along the direction of the accommodation groove approaching the sealing head, the cross-sectional area of the second transition section gradually increases.
  • valve head includes an accommodating cavity for accommodating the fluid in the accommodating cavity
  • valve head includes a flow channel, one end of the flow channel communicates with the accommodating cavity, and the other end of the flow channel communicates with the accommodating cavity.
  • the flow channel includes a first flow channel and a second flow channel, the first flow channel communicates with the accommodating cavity, and the second flow channel is used to communicate with the accommodating cavity; along the extending direction of the valve head, the transverse direction of the second flow channel The cross-sectional area is larger than the cross-sectional area of the first flow channel.
  • the accommodating cavity extends to the end of the valve head away from the valve port, so that the fluid in the accommodating cavity flows from the side of the valve head close to the valve port to the side of the valve head away from the valve port through the accommodating cavity.
  • the end of the valve head close to the valve port has a sealing head for sealing the valve port
  • the end of the valve head far away from the valve port has a guide head for contacting the valve body
  • the sealing head and the guide head are both cylindrical structures
  • the diameter of the sealing line formed between the sealing head and the valve port is equal to the outer diameter of the pilot head.
  • valve head includes an annular groove for installing an annular sealing ring, and the annular groove is located between the guide head and the receiving groove.
  • a flow regulating valve including a valve head structure, the valve head structure being the above valve head structure.
  • the valve head structure of this embodiment is arranged in the valve body of the flow regulating valve to close or avoid the valve port of the valve body.
  • the valve head structure includes: the valve head, which is movably arranged in In the valve body; accommodating groove, the accommodating groove is arranged on the valve head, and the accommodating groove is used to accommodate the fluid in the valve body; wherein, the distance between the valve head and the valve port is adjustable, when the valve head moves to between the valve port At the position where the distance is the largest, at least part of the accommodation groove is located in the accommodation chamber of the valve body.
  • valve head when the valve head is working, the valve head moves close to the valve port or moves away from the valve port in the accommodation cavity to complete the action of blocking or avoiding the valve port.
  • the maximum distance between the valve head and the valve port is The maximum stroke of the valve head.
  • a housing groove is provided at the part where the valve head is located in the housing chamber of the valve body, and the housing groove increases the volume of the housing chamber, thereby enabling the housing chamber to accommodate more fluid and increasing the flow of fluid in the housing chamber space.
  • the fluid is stored in the housing tank, and when the fluid passes through the housing chamber, the fluid flowing outside the housing tank contacts the fluid in the housing tank, thereby avoiding the contact between the fluid and the valve head and reducing the impact on the fluid flow. resistance. Therefore, the problem that the flow resistance of the valve head structure in the prior art is large and affects the fluid flow in the flow regulating valve is solved.
  • Fig. 1 shows a schematic diagram of the internal structure of an embodiment of a flow regulating valve according to the present application
  • Fig. 2 shows the structure diagram of the valve head structure of the flow regulating valve of the present application
  • Figure 3 shows a schematic diagram of the internal structure of the valve head structure of the flow regulating valve of the present application
  • Figure 4 shows a schematic structural view of the flow regulating valve provided by the present application
  • Figure 5 shows an enlarged view of selected locations in Figure 4.
  • Figure 6 shows a schematic diagram of the first connection structure in the flow regulating valve
  • Fig. 7 shows the second schematic diagram of the structure of the first connecting pipe in the flow regulating valve
  • Fig. 8 shows the third schematic diagram of the structure of the first connecting pipe in the flow regulating valve
  • Fig. 9 shows a schematic structural diagram of a flow regulating valve provided by an embodiment of the present application.
  • Figure 10 shows an enlarged view of selected positions in the flow regulating valve of Figure 9;
  • Fig. 11 shows a schematic structural view of the gasket in the flow regulating valve of Fig. 9;
  • Fig. 12 shows a schematic structural view of the valve head in the flow regulating valve of Fig. 9;
  • Fig. 13 shows a schematic structural view of the valve body in the flow regulating valve of Fig. 9;
  • Fig. 14 shows a schematic structural view of the auxiliary valve body of the flow regulating valve of Fig. 9;
  • Fig. 15 shows a schematic structural view of the needle structure of the flow regulating valve of Fig. 9;
  • Fig. 16 shows a schematic structural diagram of a flow regulating valve provided by an embodiment of the present application
  • Figure 17 shows an enlarged view of selected positions of the flow regulating valve of Figure 16;
  • FIG. 18 shows a schematic structural view of the valve body in the flow regulating valve of FIG. 16 .
  • valve body 101, valve port; 102, top wall; 104, bottom wall; 105, flow hole; 111, flow hole section; 112, sealing hole section; 113, second cone surface; 114, diversion hole Section; 115, the third cone; 11, the accommodation cavity; 121, the limit hole section; 122, the guide hole section; 123, the valve chamber; 13, the main valve seat; 1301, the first step; 14, the auxiliary valve seat; 141. Second step; 142. Auxiliary valve body; 1421. Main body; 1422. Annular boss; 1423. Flange structure; 143. Gasket; 144. First installation groove; 145. Second installation groove; 16. Arc shape surface; 212, connection hole;
  • Valve head 20. Valve head; 21. Rod body; 22. Sealing head; 23. First cone surface; 120. Accommodating cavity; 103. Flow channel; 131. First flow channel; 132. Second flow channel; 24. Guide head ; 241, annular groove;
  • valve cylinder 60, valve cylinder; 61, sealing cavity.
  • the valve head structure of this embodiment is arranged in the valve body 10 of the flow regulating valve, and is used to close or avoid the valve port 101 of the valve body 10.
  • the valve head structure includes: a valve head 20, a valve head 20 is movably arranged in the valve body 10; the accommodation groove 2, the accommodation groove 2 is arranged on the valve head 20, and the accommodation groove 2 is used to accommodate the fluid in the valve body 10; wherein, between the valve head 20 and the valve port 101 The distance is adjustable.
  • the valve head 20 moves to the position where the distance between the valve head 20 and the valve port 101 is the largest, at least part of the accommodation groove 2 is located in the accommodation chamber 11 of the valve body 10 .
  • valve head 20 when the valve head 20 is working, the valve head 20 moves close to the valve port 101 or moves away from the valve port 101 in the accommodation chamber 11 to complete the action of blocking or avoiding the valve port 101.
  • the valve head 20 and the valve port The maximum distance between 101 is the maximum stroke of the valve head 20 .
  • the valve head 20 is located in the part of the housing chamber 11 of the valve body 10.
  • the accommodation groove 2 is provided.
  • the accommodation groove 2 increases the volume of the accommodation chamber 11, so that the accommodation chamber 11 can accommodate more fluids, increasing the The flow space of the fluid in the accommodation chamber 11 reduces the turbulent flow in the valve chamber and the resistance to the fluid flow. Therefore, the problem in the prior art that the setting of the valve head structure affects the fluid flow in the flow regulating valve is solved.
  • the accommodation groove 2 is arranged around the valve head 20; and/or, the accommodation groove 2 is an annular structure.
  • the accommodation groove 2 has a first transition section 201, and the first transition section 201 is located at the end of the accommodation groove 2 away from the valve port 101; along the valve head 20 close to the valve port 101, the cross-sectional area of the first transition section 201 gradually decreases.
  • the valve head 20 includes a sealing head 22 for sealing the valve port 101 , and the sealing head 22 is arranged at one end of the receiving groove 2 close to the valve port 101 . In this way, when the valve head 20 is opened, the flow passes through the sealing head 22 and then flows out from the valve port 101 .
  • the accommodation groove 2 has a second transition section 202, and the second transition section 202 is located at one end of the accommodation groove 2 close to the sealing head 22; along the direction of the accommodation groove 2 approaching the sealing head 22, the second transition The cross-sectional area of segment 202 gradually increases. In this way, the fluid flow is more favorable.
  • the valve head 20 includes a housing cavity 120, the housing cavity 120 is used to accommodate the fluid in the housing chamber 11, the valve head 20 includes a flow channel 103, and the flow channel One end of the flow passage 103 communicates with the receiving cavity 120 , and the other end of the flow channel 103 communicates with the receiving cavity 11 .
  • the fluid in the accommodating cavity 120 can enter the accommodating cavity 120 through the circulation channel 103 , thereby increasing the circulation of the fluid in the accommodating cavity 120 .
  • the communication channel 103 includes a first communication channel 131 and a second communication channel 132, the first communication channel 131 communicates with the housing cavity 120, and the second communication channel 132 is used to communicate with the housing cavity 11 ;
  • the cross-sectional area of the second flow channel 132 is larger than the cross-sectional area of the first flow channel 131 . In this way, when the valve head 20 moves close to the valve port 101 , the second flow channel 132 can reduce the vortex at the bottom of the valve head and reduce the flow resistance.
  • the accommodating cavity 120 extends to the end of the valve head 20 away from the valve port 101, so that the fluid in the accommodating cavity 11 passes through the accommodating cavity 120 from the valve head 20
  • the side close to the valve port 101 flows to the side of the valve head 20 away from the valve port. In this way, the fluid pressure in the accommodating cavity 11 can be released, so that the operation of the valve head structure is smoother.
  • the end of the valve head 20 close to the valve port 101 has a sealing head 22 for sealing the valve port 101
  • the end of the valve head 20 away from the valve port 101 has a sealing head 22 for contacting the valve body 10.
  • the guide head 24, the seal head 22 and the guide head 24 are all cylindrical structures, and the outer diameters of the seal head 22 and the guide head 24 are equal. In this way, the pressure on both ends of the valve head 20 is consistent, so that the operation of the valve head structure is smoother.
  • the valve head 20 includes an annular groove 241 for installing the annular sealing ring 3 , and the annular groove 241 is located between the guide head 24 and the receiving groove 2 .
  • the flow regulating valve of this embodiment includes a valve head structure, and the valve head structure is the above-mentioned valve head structure.
  • the valve head structure extends into the accommodation chamber 11 to set up the accommodation groove 2, thereby increasing the fluid flow space inside the accommodation chamber 11 and reducing the flow resistance.
  • valve head 20 The structure of the valve head is placed in the guide sleeve 40, and the fluid pressure at the upper part and the lower part of the valve head 20 are the same through the internal through hole structure of the valve head 20, so that the pressure difference force received by the valve head 20 is the same when it is closed.
  • the accommodation groove 2 and the second transition section 202 are still inside the accommodation chamber 11 , and the upper part of the second transition section 202 is not lower than the lower edge of the guide sleeve 40 .
  • This structure can increase the fluid flow space inside the accommodation chamber 11, reduce the flow resistance, and increase the Cv value when the expansion valve is fully opened.
  • the valve head structure of this embodiment is arranged in the valve body 10 of the flow regulating valve, and is used to close or avoid the valve port 101 of the valve body 10.
  • the valve head structure includes: a valve head 20, which is movably arranged on the valve body. In the body 10; the accommodation groove 2, the accommodation groove 2 is arranged on the valve head 20, and the accommodation groove 2 is used to accommodate the fluid in the valve body 10; wherein, the distance between the valve head 20 and the valve port 101 is adjustable, when When the valve head 20 moves to the position where the distance from the valve port 101 is the largest, at least part of the accommodation groove 2 is located in the accommodation cavity 11 of the valve body 10 .
  • valve head 20 when the valve head 20 is working, the valve head 20 moves close to the valve port 101 or moves away from the valve port 101 in the accommodation chamber 11 to complete the action of blocking or avoiding the valve port 101.
  • the valve head 20 and the valve port The maximum distance between 101 is the maximum stroke of the valve head 20 .
  • the valve head 20 is located in the part of the housing chamber 11 of the valve body 10.
  • the accommodation groove 2 is provided.
  • the accommodation groove 2 increases the volume of the accommodation chamber 11, so that the accommodation chamber 11 can accommodate more fluids, increasing the The fluid flow space in the accommodation chamber 11 reduces the resistance to fluid flow. Therefore, the problem in the prior art that the setting of the valve head structure affects the fluid flow in the flow regulating valve is solved.
  • the embodiment of the present application provides a flow regulating valve, including: a valve body 10, the valve body 10 has an interface in the radial direction, and the valve body 10 has a valve port 101 in the axial direction; the valve head 20, movably arranged in the cavity of the valve body 10 to open or close the valve port 101; the first connection 31, one end of the first connection 31 is the installation end, and the installation end penetrates into the cavity of the valve body 10 from the interface,
  • the inner wall surface of the opening of the installation end is an annular flow guide surface 32; the end of the flow guide surface 32 positioned at the end face of the installation end is the inner end 33, and the end of the flow guide surface 32 positioned at the inside of the first connecting pipe 31 is the outer end 34, from the inner end 33 to the outer end 34, the radial dimension of the guide surface 32 gradually decreases; wherein, the distance between the inner end 33 of the guide surface 32 and the outer wall surface of the first adapter 31 is a, and the guide surface 32 The distance between the outer
  • the radial interface of the valve body 10 is connected with a first connecting pipe 31, and the end of the first connecting pipe 31 entering the valve body 10 close to the valve head 20 is the installation end, and the inner wall surface of the opening of the installation end It is an annular guide surface 32 whose radial dimension gradually decreases from the inner end 33 to the outer end 34, and the specific shape of the guide surface 32 is defined by the relationship between the distances a, b and c. Adopting this scheme, the annular guide surface 32 whose radial size gradually decreases from the inner end 33 to the outer end 34 is arranged on the inner wall surface of the opening of the installation end, so that the fluid flow through the first connecting pipe 31 is reduced.
  • the flow resistance generated when installing inside the end improves the flow capacity of the regulating valve and increases the flow rate, and it can also be used to remove flanging and burrs generated during blanking.
  • the values of a, b and c can be adjusted according to the actual usage of the control valve, so as to make adaptive adjustments to the guide surface 32 and further improve the performance of the control valve.
  • the distance between the inner end 33 and the outer end 34 can also be understood as the axial length of the guide surface 32 .
  • the distance a between the inner end 33 and the outer wall surface of the first connecting pipe 31 and the distance b between the outer end 34 and the outer wall surface of the first connecting pipe 31 are further limited, further reducing the fluid resistance and improving The flow capacity of the regulating valve.
  • b ⁇ c ⁇ 3b the distance b between the outer end 34 and the outer wall of the first connecting pipe 31 and the distance c between the inner end 33 and the outer end 34 are further limited, further reducing the fluid resistance and improving the flow of the regulating valve. ability.
  • the guide surface 32 may be specifically configured as a conical surface. Setting the flow guiding surface 32 as a conical surface can realize a smooth transition of the flow area, thereby reducing the flow resistance generated when the fluid passes through.
  • the flow regulating valve further includes: a guide sleeve 40 disposed in the cavity of the valve body 10 , the valve head 20 is movably disposed in the guide sleeve 40 , and the installation end abuts against the guide sleeve 40 .
  • a guide sleeve 40 disposed in the cavity of the valve body 10
  • the valve head 20 is movably disposed in the guide sleeve 40
  • the installation end abuts against the guide sleeve 40 .
  • the installation end abuts against the guide sleeve 40, which ensures the distance between the installation end of the first connecting pipe 31 and the valve head 20, prevents the installation end of the first connecting pipe 31 from being too close to the valve head 20 and thus produces a large flow resistance, and ensures The depth of the installation end penetrating into the valve body 10 is improved, and the connection reliability is improved.
  • the guide sleeve 40 comprises a first sleeve segment 41 and a second sleeve segment 42, the outer diameter of the second sleeve segment 42 is smaller than the outer diameter of the first sleeve segment 41, the second sleeve segment 42 and the first sleeve segment 41 is connected to the lower end surface 43, the second sleeve section 42 is closer to the valve port 101 relative to the first sleeve section 41, and the installation end abuts against the first sleeve section 41; in the axial direction of the valve head 20, the guide surface 32 is located at the bottom The side of the end surface 43 facing the valve port 101 .
  • the guide sleeve 40 is, from bottom to top, the second sleeve section 42, the lower end surface 43 and the first sleeve section 41, wherein the first sleeve section 41 is in contact with the installation end to ensure that the installation end is not close to the valve.
  • Head 20, and in the first connecting pipe 31, the flow guide surface 32 is located on the side of the lower end surface 43 facing the valve port 101, and the installation end abuts with the first sleeve section 41, which also determines the position of the flow guide surface 32 in the valve body. The specific location within 10.
  • the flow guide surface 32 is arranged on the side of the lower end surface 43 facing the valve port 101, so that the side surface of the first sleeve section 41 and the lower end surface 43 can be prevented from blocking the fluid flowing through the flow guide surface 32, and the impact on the fluid can be avoided. Resistance, thus ensuring the smooth flow of fluid.
  • the flow regulating valve further includes: a valve needle structure 50, the valve needle structure 50 includes a screw 51, a bearing 52 and a bush 53, the screw 51 includes a first rod segment, a second rod segment and a third rod segment connected in sequence, The outer diameter of the first rod segment is greater than the outer diameter of the second rod segment, and the outer diameter of the second rod segment is larger than the outer diameter of the third rod segment; the bearing 52 is sleeved on the second rod segment; the bushing 53 is sleeved on the second rod segment On the third rod segment, the bushing 53 is fixedly connected to the third rod segment, and the two end faces of the inner ring of the bearing 52 abut against the end face of the first rod segment and the end face of the bushing 53 respectively, and the bearing 52 is located in the cavity of the valve head 20 in vivo.
  • the third rod section is the installation section of the bushing 53, which is in clearance, transitional or interference fit with the inner hole of the bushing 53, and one end of the bushing 53 abuts on the inner ring of the bearing 52, which can be welded to the inner ring of the bearing 52.
  • the screw 51 is fixed as a whole, and the second rod section is the installation section of the bearing 52, which is in clearance, transition or interference fit with the inner ring of the bearing 52, and the two ends of the inner ring of the bearing 52 are respectively abutted against the end face of the first rod section and the bushing 53, In this way, the axial limit of the inner ring of the bearing 52 is realized through the bushing 53, which avoids the deformation of the inner ring of the bearing 52 due to excessive force in other limiting methods, ensures the reliability of the bearing 52, and improves the control valve. performance.
  • the length of the second rod section is M
  • the length of the inner ring of the bearing 52 is N
  • N/2 ⁇ M ⁇ N is slightly smaller than the length of the inner ring of the bearing 52, which can ensure that the bushing 53 abuts with the bearing 52 and prevent the bearing 52 from moving axially.
  • the guide surface 32 is an arc surface.
  • the guide surface 32 is set as an arc surface, which reduces the flow resistance generated when the fluid passes through, and increases the contact area between the fluid and the installation end of the first connecting pipe 31 when the fluid flows in.
  • the fillet belongs to a specific form of the arc surface in the second embodiment, which can also reduce the flow resistance, and can increase the contact area between the fluid and the installation end of the first connecting pipe 31 when the fluid flows in, thereby increasing the fluid flow.
  • the difference is that the design and processing of rounded corners is simpler than that of curved surfaces.
  • the flow regulating valve in the above embodiment is an electronic expansion valve.
  • the annular guide surface 32 whose radial size gradually decreases from the inner end 33 to the outer end 34 is arranged on the inner wall surface of the opening of the installation end, reducing the flow of fluid through the first connecting pipe 31
  • the flow resistance generated when inside the installation end improves the flow capacity of the electronic expansion valve and increases the flow rate.
  • the guide surface 32 can be set as an arc surface, a conical surface or other forms.
  • the values of a, b and c can be adjusted according to the actual use of the electronic expansion valve, so as to make adaptive adjustments to the guide surface 32 and further improve the performance of the electronic expansion valve.
  • the embodiment of the present application provides a flow regulating valve, including: a valve body 10, the valve body 10 has a valve port 101; a valve head 20, the valve head 20 is movably arranged on the valve body In the cavity of 10, the valve head 20 includes a rod body 21 and a sealing head 22 connected to each other.
  • the end of the sealing head 22 away from the rod body 21 is provided with a first conical surface 23, and the cone angle of the first conical surface 23 is a1, 100° ⁇ a1 ⁇ 150°, the sealing head 22 is used to block the valve port 101 .
  • the fluid in the cavity of the valve body 10 can be guided.
  • this setting reduces the flow resistance of the fluid in the cavity of the valve body 10 and improves the performance of the flow regulating valve, and this setting eliminates the need to expand the cavity of the valve port 101 and the valve body 10 to ensure the performance of the flow regulating valve.
  • the volume of the flow regulating valve is reduced, and the processing cost is reduced.
  • limiting the taper angle a1 of the first taper surface 23 within the above range can not only reduce the resistance, but also ensure the sealing effect of the valve port 101 when it is closed.
  • the radial dimension of the sealing head 22 is greater than the radial dimension of the rod body 21, and the end of the sealing head 22 connected to the rod body 21 is also provided with a tapered surface, which reduces the flow resistance of the fluid in the cavity of the valve body 10 and improves the flow rate. Regulating valve performance.
  • the maximum diameter of the sealing head 22 is D1
  • the minimum diameter of the valve port 101 is D2, 0.15mm ⁇ D1-D2 ⁇ 1mm. This setting ensures the length of the sealing head 22 extending into the valve port 101, and also ensures that the diameter of the sealing surface formed by the valve port 101 and the sealing head 22 is greater than the minimum diameter D2 of the valve port, thereby improving the reliability of the seal.
  • the valve port 101 includes a flow hole section 111 and a sealing hole section 112 that communicate with each other.
  • the radial dimension of the sealing hole section 112 gradually increases in the direction of the flow hole section 111 toward the sealing hole section 112.
  • the inner wall of the sealing hole segment 112 forms a second tapered surface 113, and the taper angle of the second tapered surface 113 is b1, where a1>b1.
  • the minimum diameter D2 of the valve port 101 is the diameter of the flow hole section 111
  • the diameter D1 of the sealing head 22 is larger than the diameter D2 of the flow hole section 111 to ensure the reliability of the seal.
  • valve port 101 also includes a diversion hole segment 114, the diversion hole segment 114 communicates with the end of the sealing hole segment 112 away from the flow hole segment 111, the radial dimension of the flow guide hole segment 114 is in the direction of the flow hole segment 111 toward The direction of the sealing hole section 112 increases gradually, and the inner wall of the diversion hole section 114 forms a third cone surface 115, and the cone angle of the third cone surface 115 is c1, c1 ⁇ b1.
  • This setting ensures that the sealing head 22 will not interfere with the diversion hole section 114 during the movement process, ensuring the reliability of sealing between the sealing head 22 and the sealing hole section 112.
  • the fluid plays a guiding role, reduces the fluid flow resistance in the cavity of the valve body, and improves the performance of the flow regulating valve.
  • the valve body 10 has an accommodating cavity 11, and the valve head 20 also includes a guide head 24 interconnected with the rod body 21.
  • the inner side wall of the accommodating chamber 11 is limitedly fitted. In this way, the movement of the valve head 20 is guided by the cooperation between the guide head 24 and the accommodating chamber 11 , so that the valve head 20 will not deviate during the movement and the reliability of the flow regulating valve is ensured.
  • the accommodating cavity 11 includes a limiting hole section 121, a guide hole section 122 and a valve cavity 123 which are connected in sequence, and the guide head 24 is movably arranged in the guide hole section 122;
  • the flow regulating valve also includes a valve needle structure 50, the valve The needle structure 50 is connected to the valve head 20 and set through the limiting hole section 121 . In this way, the movement of the valve head 20 is guided through the cooperation of the guide head 24 and the guide hole section 122 to ensure the reliability of the movement of the valve head 20.
  • valve head 20 is connected with the valve needle structure 50, and the valve needle structure 50 passes through
  • the limiting hole section 121 is provided to prevent the valve needle structure 50 from shifting during the process of driving the valve head 20 to move, further ensuring the reliability of the valve head 20 to move.
  • the valve body 10 includes a main valve seat 13 and an auxiliary valve seat 14 connected to each other.
  • the inner side wall of the main valve seat 13 has a first step 1301
  • the outer side wall of the auxiliary valve seat 14 has a second step 141.
  • the first step 1301 and the second step 141 limit fit.
  • the inner side wall of the main valve seat 13 has a first step 1301
  • the outer side wall of the auxiliary valve seat 14 has a second step 141
  • the second step 141 and the first step 1301 are limitedly fitted.
  • the first step 1301 includes a first step surface in the axial direction of the main valve seat 13 and a second step surface in the radial direction of the main valve seat 13.
  • the first step surface and the second step surface form the first step 1301, and the second step 141 includes The third step surface on the axial direction of the auxiliary valve seat 14 and the fourth step surface on the radial direction of the auxiliary valve seat 14, the third step surface and the fourth step surface form the second step 141, the first step surface and the third step surface limit Position fit, the second step surface and the fourth step surface limited fit.
  • a flow hole 105 is opened on the side wall of the main valve seat to connect with an external connecting pipe, and the external connecting pipe communicates with the accommodating cavity 11 .
  • the auxiliary valve seat 14 includes an auxiliary valve body 142 and a gasket 143 that are connected to each other.
  • the gasket 143 is disposed in the first installation groove 144
  • the second step 141 is located on the auxiliary valve body 142 .
  • the auxiliary valve body 142 includes a main body 1421 and an annular boss 1422 disposed on the main body 1421, the auxiliary valve body 142 also includes a flange structure 1423, the flange structure 1423 is connected with the annular boss 1422, and the flange structure 1423 is annular structure, the flange structure 1423 and the sealing gasket 143 are in limited fit. In this way, the sealing gasket 143 is installed through the flanging form of the flanging structure 1423, and the assembly operation is simple and the installation is reliable.
  • the other end of the auxiliary valve body 142 has a second installation groove 145 for connecting an external connecting pipe and communicating the external connecting pipe with the valve port 101 .
  • the flow regulating valve also includes: a valve needle structure 50, the valve needle structure 50 includes a screw 51, a bearing 52 and a bushing 53, and the screw 51 includes first rods that are sequentially connected and whose radial dimensions increase sequentially segment 511, the second rod segment 512 and the third rod segment 513, the bearing 52 is sleeved on the second rod segment 512, the bushing 53 is sleeved on the first rod segment 511 and is fixedly connected with the first rod segment 511, the bearing The two end faces of the inner ring of 52 abut against the end face of the third rod section 513 and the end face of the bushing 53 respectively, and both the bearing 52 and the bushing 53 are located in the cavity of the valve head 20 .
  • the first rod section 511 is the installation section of the bushing 53, which is in clearance, transition or interference fit with the inner hole of the bushing 53.
  • One end of the bushing 53 abuts against the inner ring of the bearing 52, and can be welded It is fixed as a whole with the screw rod 51
  • the second rod section 512 is the installation section of the bearing 52, which is in clearance, transitional or interference fit with the inner ring of the bearing 52, and the two ends of the inner ring of the bearing 52 are respectively abutted against the end surface and lining of the third rod section 513.
  • the third rod segment 513 of the screw rod 51 passes through the limiting hole segment 121 and is in clearance fit with the limiting hole segment 121 to ensure the reliability of the movement of the screw rod 51 .
  • the embodiment of the present application provides a flow regulating valve, including: a valve body 10, the valve body 10 has a valve cavity 123, and the two ends of the valve cavity 123 have a top wall 102 and a bottom wall respectively 104, the side wall of the valve cavity 123 is provided with a flow hole 105 communicating with the valve cavity 123, the flow hole 105 is located between the top wall 102 and the bottom wall 104, and the bottom wall 104 is provided with a valve port 101 communicating with the valve cavity 123; Valve head 20, at least a part of valve head 20 is movably arranged in valve cavity 123, to open or close valve port 101; Wherein, the junction of top wall 102 and the side wall of valve cavity 123 has arc surface 16, in On the section where the axis of the valve body 10 is located, the radius of curvature of the arc of the arc surface 16 is R, and 1mm ⁇ R ⁇ 5mm.
  • connection between the top wall 102 and the side wall of the valve cavity 123 is set as an arc-shaped surface 16, and the fluid flowing into the valve cavity 123 is guided through the arc-shaped surface 16, and the valve cavity 123 is lowered.
  • the flow resistance of fluid flow improves the efficiency of fluid flow; the radius of curvature R of the arc surface 16 is limited.
  • R ⁇ 1mm the size of the arc surface 16 is too small to play the role of diversion.
  • R> 5mm the arc surface 16 is too large, affecting the volume of the valve chamber 123, so R is limited between 1mm and 5mm, and the fluid flowing into the valve chamber 123 can be guided without affecting the overall structure of the valve body 10. flow, improving the performance of the flow regulating valve.
  • such arrangement eliminates the need to expand the valve port 101 and the valve cavity 123 to ensure the performance of the flow regulating valve, which reduces the volume of the flow regulating valve and reduces the processing cost.
  • the arcuate surface 16 is a part of a spherical surface.
  • the radius of curvature R is the radius of the spherical surface, which facilitates the processing of the arc-shaped surface 16 .
  • the flow regulating valve also includes: a first connecting pipe 31, one end of the first connecting pipe 31 is arranged in the flow hole 105, the first connecting pipe 31 communicates with the valve chamber 123, the axis of the first connecting pipe 31 is arranged perpendicular to the axis of the valve body 10, the second
  • the shortest distance between the inner wall of the connecting pipe 31 and the top wall 102 in the axial direction of the valve body 10 is A, and A ⁇ 1mm.
  • the valve head 20 has a pilot head 24, a rod body 21 and a sealing head 22 connected to each other.
  • the radial dimension of the rod body 21 is smaller than the radial dimension of the pilot head 24 and the sealing head 22.
  • the valve body 10 also has a pilot hole communicating with the valve chamber 123 Section 122, the guide head 24 and the guide hole section 122 are in limited fit.
  • the sealing head 22 is used to block the valve port 101. When the valve port 101 is open, the guide head 24 is completely located in the guide hole section 122.
  • valve port 101 if the valve port 101 is fully open, a part of the guide head 24 is located in the valve cavity 123, the radial dimension of the guide head 24 is larger than the radial dimension of the rod body 21, and the fluid flows from the first connecting pipe 31 to the
  • the valve chamber 123 respectively contacts the guide head 24 and the rod body 21 , which will cause the flow resistance of the fluid in the valve chamber 123 to increase.
  • the guide head 24 is completely located in the guide hole section 122. This arrangement reduces the flow resistance of the fluid in the valve cavity 123 and further improves the performance of the flow regulating valve.
  • the valve port 101 includes a guide hole section 114, a sealing hole section 112 and a flow hole section 111 connected in sequence, and the radial dimension of the flow guide hole section 114 gradually increases in the direction of the flow hole section 111 toward the sealing hole section 112 , the radial dimension of the sealing hole section 112 gradually increases in the direction of the flow hole section 111 toward the sealing hole section 112 , and the sealing head 22 abuts against the sealing hole section 112 when the valve port 101 is closed. Arranged in this way, the fluid flows through the sealing hole section 112 through the guiding effect of the guide hole section 114 and finally flows into the flow hole section 111.
  • the sealing head 22 fits with the sealing hole section 112 of the valve port 101 to form a sealing surface, thereby closing the valve port 101 and ensuring the reliability of sealing.
  • the opening angle of the diversion hole section 114 is greater than the opening angle of the sealing hole section 112 , so that the reliability of sealing and the flow efficiency of the fluid can be ensured at the same time.
  • the outer wall of the guide head 24 has an annular groove 241
  • the flow regulating valve includes an annular sealing ring 3
  • the annular sealing ring 3 is arranged in the annular groove 241
  • the outer ring of the annular sealing ring 3 is in sealing fit with the inner wall of the guide hole section 122 .
  • the flow regulating valve also includes a valve cylinder 60, one end of the valve cylinder 60 is connected to the end of the main valve seat 13 away from the auxiliary valve seat 14, the cavity of the valve cylinder 60 is a sealed cavity 61, and the sealed cavity 61 communicates with the valve cavity 123 .
  • an annular sealing ring 3 is provided in the annular groove 241 on the outer side wall of the guide head 24 to ensure that the fluid in the valve chamber 123 will not pass through the outer side wall of the guide head 24 and the inner side wall of the guide hole section 114 The gap between them enters the sealing cavity 61 of the valve barrel 60 to ensure the reliability of the flow regulating valve.
  • the valve body 10 includes a main valve seat 13 and an auxiliary valve seat 14 connected to each other, the bottom wall 104 is located on the auxiliary valve seat 14, the top wall 102 is located on the main valve seat 13, the inner side wall of the main valve seat 13 has a first step 1301, There is a second step 141 on the outer wall of the auxiliary valve seat 14 , and the first step 1301 and the second step 141 are limitedly fitted.
  • the inner wall of the main valve seat 13 has a first step 1301
  • the outer wall of the auxiliary valve seat 14 has a second step 141
  • the second step 141 and the first step 1301 are limitedly fitted.
  • the first step 1301 includes a first step surface in the axial direction of the main valve seat 13 and a second step surface in the radial direction of the main valve seat 13.
  • the first step surface and the second step surface form the first step 1301, and the second step 141 includes The third step surface on the axial direction of the auxiliary valve seat 14 and the fourth step surface on the radial direction of the auxiliary valve seat 14, the third step surface and the fourth step surface form the second step 141, the first step surface and the third step surface limit Position fit, the second step surface and the fourth step surface limited fit.
  • the auxiliary valve seat 14 includes an auxiliary valve body 142 and a gasket 143 connected to each other.
  • the valve port 101 is disposed on the gasket 143 .
  • One end of the auxiliary valve body 142 has a first installation groove, and the gasket 143 is arranged in the first installation groove.
  • the auxiliary valve body 142 includes a cylinder body, an annular boss and a flange structure connected in sequence, the flange structure is a ring structure, and the flange structure and the sealing gasket 143 are limitedly fitted.
  • the installation of the sealing gasket 143 is realized in the form of flange, the assembly operation is simple, and the installation is reliable.
  • the other end of the auxiliary valve body 142 has a second installation groove 145, and the flow regulating valve also includes a second connecting pipe 35, one end of the second connecting pipe 35 is installed in the second installing groove 145, and the second connecting pipe 35 is connected to the valve port. 101 connectivity.
  • the fluid flows into the valve chamber 123 from the first connecting pipe 31 , flows into the second connecting pipe 35 through the valve port 101 communicating with the valve chamber 123 , and finally flows out from the second connecting pipe 35 .
  • the flow hole 105 is disposed on the inner wall of the valve cavity 123 , and the axes of the first connecting pipe 31 and the second connecting pipe 35 are arranged vertically. Such setting can improve the flow capacity of the fluid and improve the performance of the flow regulating valve.
  • the flow regulating valve also includes: a valve needle structure 50, the valve needle structure 50 includes a screw rod 51, a bearing 52 and a bushing 53, and the screw rod 51 includes a first rod segment 511, a second rod segment 511, and a second rod segment that are sequentially connected and whose radial dimensions are sequentially increased.
  • the bearing 52 is sleeved on the second rod segment 512
  • the bushing 53 is sleeved on the first rod segment 511 and is fixedly connected with the first rod segment 511
  • the two inner rings of the bearing 52 The two end surfaces abut against the end surface of the third rod section 513 and the end surface of the bushing 53 respectively, and the bearing 52 and the bushing 53 are both located in the cavity of the valve head 20 .
  • the first rod section 511 is the installation section of the bushing 53, which is in clearance, transition or interference fit with the inner hole of the bushing 53.
  • One end of the bushing 53 abuts against the inner ring of the bearing 52, and can be welded It is fixed as a whole with the screw rod 51
  • the second rod section 512 is the installation section of the bearing 52, which is in clearance, transitional or interference fit with the inner ring of the bearing 52, and the two ends of the inner ring of the bearing 52 are respectively abutted against the end surface and lining of the third rod section 513.
  • the flow regulating valve includes: a main valve seat 13, the main valve seat 13 has an accommodating cavity 11; an auxiliary valve seat 14, the auxiliary valve seat 14 includes an auxiliary valve body 142 connected to each other and a sealing gasket 143, the auxiliary valve body 142 is connected to the main valve seat 13, the gasket 143 has a valve port 101, the valve port 101 communicates with the accommodating chamber 11, and the end of the auxiliary valve body 142 away from the valve port 101 has a second installation groove 145; the valve head 20 , the valve head 20 is movably arranged in the accommodating cavity 11 to block or open the valve port 101; the second connecting pipe 35, one end of the second connecting pipe 35 is arranged in the second installation groove 145, the second connecting pipe 35 and the valve port 101 connected; wherein, the flow area of the valve port 101 is S1, the flow area of the second connecting pipe 35 is S2,
  • the auxiliary valve body 142 also has a connection hole 212 and a first installation groove 144, the sealing gasket 143 is arranged in the first installation groove 144, the valve port 101, the connection hole 212 and the second connecting pipe 35 are connected in sequence, and the flow area of the connection hole 212 is S3,
  • the connecting hole 212 is located between the valve port 101 and the second connecting pipe 35.
  • the flow through the valve port is reduced.
  • the resistance of the fluid flowing into the connection hole 212 at 101 ensures that the connection hole 212 will not affect the fluid passing through the valve port 101, which improves the fluidity of the fluid in the flow regulating valve and improves the performance of the flow regulating valve.
  • the minimum diameter of the valve port 101 is D2
  • the inner diameter of the second connecting pipe 35 is D4
  • the inner diameter of the connecting hole 212 is D3, D3 ⁇ D2, D3 ⁇ D4.
  • the circulation area S1 is the area where D2 is located
  • the circulation area S2 is the area where D4 is located
  • the circulation area S3 is the area where D3 is located.
  • the auxiliary valve body 142 includes a main body 1421 and an annular boss 1422 disposed on the main body 1421.
  • the auxiliary valve body 142 also includes a flange structure 1423, which is connected to the annular boss 1422. A part of the main body 1421 is connected to the ring.
  • the first installation groove 144 is formed around the boss 1422 , the wall thickness of the flange structure 1423 is smaller than that of the annular boss 1422 , and the flange structure 1423 and the gasket 143 are limitedly fitted.
  • the sealing gasket 143 is fixed in the main body 1421 and the annular boss 1422 through the flange structure 1423, so as to prevent the sealing gasket 143 from shaking and rotating in the auxiliary valve body 142, and at the same time avoid the sealing gasket 143 being subjected to large
  • the wall thickness of the annular boss 1422 is smaller than the wall thickness of the main body 1421, so that the wall thickness of the annular boss 1422 is greater than the wall thickness of the flange structure 1423 and smaller than the wall thickness of the main body 1421, ensuring the flange structure 1423
  • the flanging is smooth, avoiding the impact on the sealing gasket 143 during flanging, and it is not easy to cause the sealing gasket 143 to be deformed under force.
  • the flange structure 1423 is a ring structure, and the flange structure 1423 is bonded to the gasket 143, and the distance between the inner peripheral surface of the flange structure 1423 and the valve port 101 is a2, 0.2mm ⁇ a2 ⁇ 2mm.
  • the reliability of the flange structure 1423 is ensured through the limitation of a2. If a2 ⁇ 0.2mm, the flanging structure 1423 will be too long, causing damage to the flanging and bending position of the flanging structure 1423; if a2>2mm, the flanging structure 1423 will be too short, resulting in the flanging structure 1423 After flanging, the bonding area with the sealing gasket 143 is too small, which cannot guarantee the compression of the sealing gasket 143, which reduces the reliability of the auxiliary valve seat.
  • the inner peripheral surface of the flange structure 1423 is the annular surface where the flange structure 1423 faces the axis of the valve port 101 after the flange structure 1423 is bonded to the gasket 143 .
  • the valve head 20 has a receiving hole
  • the valve needle structure 50 includes: a screw rod 51, the screw rod 51 includes a first rod segment 511, a second rod segment 512 and a third rod segment 513 which are sequentially connected and whose radial dimensions increase sequentially; a bushing 53 , the bushing 53 is sleeved on the first rod section 511 and fixedly connected with the first rod section 511, the bushing 53 is located in the receiving hole; the bearing 52, the bearing 52 is sleeved on the second rod section 512, and the inside of the bearing 52 The two ends of the ring abut against the end face of the third rod section 513 and the end face of the bushing 53 respectively, and the side wall of the bearing 52 and the side wall of the accommodation hole are limitedly matched; the pressure sleeve 54 is fixedly connected with the accommodation hole of the pressure sleeve 54, One end of the pressure sleeve 54 abuts against the end surface of the outer ring of the bearing 52 facing
  • the first rod section 511 is the installation section of the bushing 53, which is in clearance, transition or interference fit with the inner hole of the bushing 53.
  • One end of the bushing 53 abuts against the inner ring of the bearing 52, and can be welded It is fixed as a whole with the screw rod 51
  • the second rod section 512 is the installation section of the bearing 52, which is in clearance, transitional or interference fit with the inner ring of the bearing 52, and the two ends of the inner ring of the bearing 52 are respectively abutted against the end surface and lining of the third rod section 513.

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  • General Engineering & Computer Science (AREA)
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  • Lift Valve (AREA)

Abstract

本申请提供了一种阀头结构及具有其的流量调节阀，阀头结构，设置在流量调节阀的阀体内，用于关闭或者避让阀体的阀口，阀头结构包括：阀头，阀头可移动地设置在阀体内；容纳槽，容纳槽设置在阀头上，容纳槽用于容纳阀体内的流体；其中，阀头与阀口之间的距离可调节地设置，当阀头移动至与阀口之间的距离最大的位置时，容纳槽的至少部分位于阀体的容纳腔内。本申请的阀头结构解决了现有技术中的阀头结构的设置流阻大，影响流量调节阀内的流体流动的问题。

Description

阀头结构及具有其的流量调节阀 技术领域
本申请涉及流量调节阀领域，具体而言，涉及一种阀头结构及具有其的流量调节阀。
背景技术
在现有的流量调节阀中，阀头伸入阀腔内部的部分通常为圆柱结构。
然而，当需要将阀体做小，从而降低产品成本时，上述的阀头结构即使在阀头全开时，因阀腔内部的空间有限，阀腔内的流动阻力大，导致Cv(即每分钟通过的流体的流量)值偏小，无法满足Cv值的设计要求。
申请内容
本申请的主要目的在于提供一种阀头结构及具有其的流量调节阀，以解决现有技术中的阀头结构的设置影响流量调节阀内的流体流动的问题。
为了实现上述目的，根据本申请的一个方面，提供了一种阀头结构，设置在流量调节阀的阀体内，用于关闭或者避让阀体的阀口，阀头结构包括：阀头，阀头可移动地设置在阀体内；容纳槽，容纳槽设置在阀头上，容纳槽用于容纳阀体内的流体；其中，阀头与阀口之间的距离可调节地设置，当阀头移动至与阀口之间的距离最大的位置时，容纳槽的至少部分位于阀体的容纳腔内。
进一步地，容纳槽环绕阀头设置；和/或，容纳槽为环形结构。
进一步地，容纳槽具有第一过渡段，第一过渡段位于容纳槽远离阀口的一端；沿阀头靠近阀口的方向，第一过渡段的横截面积逐渐减小。
进一步地，阀头包括用于封堵阀口的密封头，密封头设置在容纳槽靠近阀口的一端。
进一步地，容纳槽具有第二过渡段，第二过渡段位于容纳槽靠近密封头的一端；沿容纳槽靠近密封头的方向，第二过渡段的横截面积逐渐增大。
进一步地，阀头包括容纳腔体，容纳腔体用于容纳容纳腔内的流体，阀头包括流通通道，流通通道的一端与容纳腔体连通，流通通道的另一端与容纳腔连通。
进一步地，流通通道包括第一流通通道和第二流通通道，第一流通通道与容纳腔体连通，第二流通通道用于与容纳腔连通；沿阀头的延伸方向，第二流通通道的横截面积大于第一流通通道的横截面积。
进一步地，容纳腔体延伸至阀头远离阀口的一端，以使容纳腔内的流体经过容纳腔体由阀头靠近阀口的一侧流动至阀头远离阀口的一侧。
进一步地，阀头靠近阀口的一端具有用于封堵阀口的密封头，阀头远离阀口的一端具有用于与阀体接触的导向头，密封头与导向头均为圆柱形结构，密封头与阀口之间所形成的密封线直径与导向头的外径相等。
进一步地，阀头包括用于安装环形密封圈的环形槽，环形槽位于导向头与容纳槽之间。
根据本申请的另一方面，提供了一种流量调节阀，包括阀头结构，阀头结构为上述的阀头结构。
应用本申请的技术方案，本实施例的阀头结构，设置在流量调节阀的阀体内，用于关闭或者避让阀体的阀口，阀头结构包括：阀头，阀头可移动地设置在阀体内；容纳槽，容纳槽设置在阀头上，容纳槽用于容纳阀体内的流体；其中，阀头与阀口之间的距离可调节地设置，当阀头移动至与阀口之间的距离最大的位置时，容纳槽的至少部分位于阀体的容纳腔内。需要说明的是，阀头在工作时，阀头在容纳腔内靠近阀口运动或者远离阀口运动，以完成封堵或者避让阀口的动作，阀头与阀口之间的最大距离即为阀头的最大行程。采用上述设置，在阀头位于在阀体的容纳腔内的部分设置容纳槽，容纳槽增加了容纳腔的容积，从而让容纳腔能够容纳更多的流体，增加了流体在容纳腔内的流动空间。并且，容纳槽内储存了流体，在流体通过容纳腔内时，容纳槽外的流动的流体与容纳槽内的流体接触，从而避免了流体与阀头的接触，减小了流体流动所受到的阻力。从而，解决了现有技术中的阀头结构的设置流阻大，影响流量调节阀内的流体流动的问题。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的不当限定。在附图中：
图1示出了根据本申请的流量调节阀的实施例的内部结构示意图；
图2示出了本申请的流量调节阀的阀头结构的结构示意图；
图3示出了本申请的流量调节阀的阀头结构的内部结构示意图；
图4示出了本申请提供的流量调节阀的结构示意图；
图5示出了图4中所选位置的放大图；
图6示出了流量调节阀中的第一接管结构示意图一；
图7示出了流量调节阀中的第一接管结构示意图二；
图8示出了流量调节阀中的第一接管结构示意图三；
图9示出了本申请的实施例提供的流量调节阀的结构示意图；
图10示出了图9的流量调节阀中的所选位置的放大图；
图11示出了图9的流量调节阀中的密封垫的结构示意图；
图12示出了图9的流量调节阀中的阀头的结构示意图；
图13示出了图9的流量调节阀中的阀体的结构示意图；
图14示出了图9的流量调节阀的辅阀体的结构示意图；
图15示出了图9的流量调节阀的阀针结构的结构示意图；
图16示出了本申请的实施例提供的流量调节阀的结构示意图；
图17示出了图16的流量调节阀的所选位置的放大图；
图18示出了图16的流量调节阀中的阀体的结构示意图。
其中，上述附图包括以下附图标记：
10、阀体；101、阀口；102、顶壁；104、底壁；105、流通孔；111、过流孔段；112、密封孔段；113、第二锥面；114、导流孔段；115、第三锥面；11、容纳腔；121、限位孔段；122、导向孔段；123、阀腔；13、主阀座；1301、第一台阶；14、辅阀座；141、第二台阶；142、辅阀体；1421、主体；1422、环形凸台；1423、翻边结构；143、密封垫；144、第一安装槽；145、第二安装槽；16、弧形面；212、连接孔；
20、阀头；21、杆体；22、密封头；23、第一锥面；120、容纳腔体；103、流通通道；131、第一流通通道；132、第二流通通道；24、导向头；241、环形槽；
2、容纳槽；201、第一过渡段；202、第二过渡段；3、环形密封圈；
31、第一接管；32、导流面；33、内端；34、外端；35、第二接管；
40、导向套；41、第一套段；42、第二套段；43、下端面；
50、阀针结构；51、螺杆；511、第一杆段；512、第二杆段；513、第三杆段；52、轴承；53、衬套；54、压套；
60、阀筒；61、密封腔。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。下面将参考附图并结合实施例来详细说明本申请。
如图1至图3，本实施例的阀头结构，设置在流量调节阀的阀体10内，用于关闭或者避让阀体10的阀口101，阀头结构包括：阀头20，阀头20可移动地设置在阀体10内；容纳槽2，容纳槽2设置在阀头20上，容纳槽2用于容纳阀体10内的流体；其中，阀头20与阀口101之间的距离可调节地设置，当阀头20移动至与阀口101之间的距离最大的位置时，容纳槽2的至少部分位于阀体10的容纳腔11内。需要说明的是，阀头20在工作时，阀头20在容纳腔11内靠近阀口101运动或者远离阀口101运动，以完成封堵或者避让阀口101的动作，阀头20与阀口101之间的最大距离即为阀头20的最大行程。采用上述设置，在阀头20位于在阀体10的容纳腔11内的部分设置容纳槽2，容纳槽2增加了容纳腔11的容积，从而让容纳腔11能够容纳更多的流体，增加了流体在容纳腔11内的流动空间，减小阀腔内的湍流，减小了流体流动所受到的阻力。从而，解决了现有技术中的阀头结构的设置影响流量调节阀内的流体流动的问题。
在本实施例的阀头结构中，容纳槽2环绕阀头20设置；和/或，容纳槽2为环形结构。采用上述设置，加工方便，降低了生产成本。
如图1至图3，在本实施例的阀头结构中，容纳槽2具有第一过渡段201，第一过渡段201位于容纳槽2远离阀口101的一端；沿阀头20靠近阀口101的方向，第一过渡段201的横截面积逐渐减小。采用上述设置，避免了尺寸突变产生的漩涡，从而减小了流体流动时受到的阻力。
在本实施例的阀头结构中，阀头20包括用于封堵阀口101的密封头22，密封头22设置在容纳槽2靠近阀口101的一端。这样，在阀头20打开时，流通流经密封头22后从阀口101流出。
在本实施例的阀头结构中，容纳槽2具有第二过渡段202，第二过渡段202位于容纳槽2靠近密封头22的一端；沿容纳槽2靠近密封头22的方向，第二过渡段202的横截面积逐渐增大。这样，更加有利于流体的流动。
如图1至图3，在本实施例的阀头结构中，阀头20包括容纳腔体120，容纳腔体120用于容纳容纳腔11内的流体，阀头20包括流通通道103，流通通道103的一端与容纳腔体120连通，流通通道103的另一端与容纳腔11连通。这样，容纳腔体120内的流体能够通过流通通道103进入到容纳腔体120内，从而增加了容纳腔体120内的流体的流通性。
在本实施例的阀头结构中，流通通道103包括第一流通通道131和第二流通通道132，第一流通通道131与容纳腔体120连通，第二流通通道132用于与容纳腔11连通；沿阀头20的延伸方向，第二流通通道132的横截面积大于第一流通通道131的横截面积。这样，在阀头20靠近阀口101运动时，第二流通通道132可以减小阀头底部的漩涡，减小流通阻力。
如图1至图3，在本实施例的阀头结构中，容纳腔体120延伸至阀头20远离阀口101的一端，以使容纳腔11内的流体经过容纳腔体120由阀头20靠近阀口101的一侧流动至阀头20远离阀口的一侧。这样，能够释放容纳腔11内的流体压力，使阀头结构的运行更加地流畅。
在本实施例的阀头结构中，阀头20靠近阀口101的一端具有用于封堵阀口101的密封头22，阀头20远离阀口101的一端具有用于与阀体10接触的导向头24，密封头22与导向头24均为圆柱形结构，密封头22与导向头24的外径相等。这样，使得阀头20的两端受到的压强一致，从而使阀头结构的运行更加地流畅。
如图1至图3，在本实施例的阀头结构中，阀头20包括用于安装环形密封圈3的环形槽241，环形槽241位于导向头24与容纳槽2之间。
本实施例的流量调节阀，包括阀头结构，阀头结构为上述的阀头结构。
对本实施例的流量调节阀的阀头结构的说明如下：
阀头结构伸入容纳腔11段设置容纳槽2，从而增加流体在容纳腔11内部的流动空间，减小流动阻力。
阀头结构置于导向套40内，通过阀头20内部通孔结构实现阀头20的上部与下部流体压力相同，实现阀头20在关闭时受到的压差力相同。
阀头处于全开位置时，容纳槽2及第二过渡段202仍处于容纳腔11内部，并且第二过渡段202上部不低于导向套40的下沿。
该结构可增加流体在容纳腔11内部的流动空间，减小流动阻力，增加膨胀阀全开时的Cv值。
从以上的描述中，可以看出，本申请上述的实施例实现了如下技术效果：
本实施例的阀头结构，设置在流量调节阀的阀体10内，用于关闭或者避让阀体10的阀口101，阀头结构包括：阀头20，阀头20可移动地设置在阀体10内；容纳槽2，容纳槽2设置在阀头20上，容纳槽2用于容纳阀体10内的流体；其中，阀头20与阀口101之间的距离可调节地设置，当阀头20移动至与阀口101之间的距离最大的位置时，容纳槽2的至少部分位于阀体10的容纳腔11内。需要说明的是，阀头20在工作时，阀头20在容纳腔11内靠近阀口101运动或者远离阀口101运动，以完成封堵或者避让阀口101的动作，阀头20与阀口101之间的最大距离即为阀头20的最大行程。采用上述设置，在阀头20位于在阀体10的容纳腔11内的部分设置容纳槽2，容纳槽2增加了容纳腔11的容积，从而让容纳腔11能够容纳更多的流体，增加了流体在容纳腔11内的流动空间，减小了流体流动所受到的阻力。从而，解决了现有技术中的阀头结构的设置影响流量调节阀内的流体流动的问题。
如图4至图6所示，本申请的实施例提供了一种流量调节阀，包括：阀体10，阀体10的径向具有接口，阀体10的轴向具有阀口101；阀头20，可移动地设置在阀体10的腔体内，以打开或关闭阀口101；第一接管31，第一接管31的一端为安装端，安装端从接口穿入阀体10的腔体内，安装端的开口的内壁面为环形的导流面32；导流面32位于安装端的端面的一端为内端33，导流面32位于第一接管31内部的一端为外端34，在从内端33到外端34的方向上，导流面32的径向尺寸逐渐减小；其中，导流面32在内端33与第一接管31的外壁面 之间的距离为a，导流面32在外端34与第一接管31的外壁面之间的距离为b，内端33和外端34之间的距离为c，0.1b≤a≤0.5b，0.5b≤c≤4b。
如图4所示，在本实施例中，阀体10径向接口处连接有第一接管31，第一接管31进入阀体10靠近阀头20的一端为安装端，安装端开口的内壁面为径向尺寸从内端33到外端34的方向上逐渐减小的环形导流面32，且该导流面32的具体形状由距离a、b和c的关系进行限定。采用该方案，通过设置在安装端开口内壁面上的，径向尺寸从内端33到外端34的方向上逐渐减小的环形导流面32，减小了流体流经第一接管31的安装端内时产生的流通阻力，提高调节阀的流通能力，增大流通流量，同时也能用来除下料时产生的翻边、毛刺。而且可根据调节阀的实际使用情况对a、b和c的数值进行调整，从而对导流面32进行适应性调整，更进一步提高调节阀的性能。其中，内端33和外端34之间的距离也可以理解为导流面32的轴向长度。
具体地，0.25b≤a≤0.4b。这样对内端33与第一接管31的外壁面之间的距离a和外端34与第一接管31的外壁面之间的距离b进行进一步地限定，更进一步地减小了流体阻力，提高了调节阀的流通能力。
进一步地，b≤c≤3b。这样对外端34与第一接管31的外壁面之间的距离b和内端33与外端34之间的距离c进行进一步地限定，更进一步地减小了流体阻力，提高了调节阀的流通能力。
如图6中所示，导流面32具体可设置为锥面。将导流面32设置为锥面，可实现流通面积的平稳过渡，从而减小了流体通过时产生的流通阻力。
具体地，流量调节阀还包括：导向套40，设置在阀体10的腔体内，阀头20可移动地设置在导向套40内，安装端和导向套40抵接。通过导向套40的导向作用，保证阀头20在移动时不会发生偏移，避免影响调节阀的使用。且安装端和导向套40抵接，保证了第一接管31安装端与阀头20之间的距离，防止第一接管31安装端距离阀头20过近从而产生较大的流通阻力，并且保证了安装端穿入阀体10内的深度，提高连接可靠性。
如图4所示，导向套40包括第一套段41和第二套段42，第二套段42的外径小于第一套段41的外径，第二套段42和第一套段41的下端面43连接，第二套段42相对于第一套段41靠近阀口101，安装端和第一套段41抵接；在阀头20的轴向上，导流面32位于下端面43的朝向阀口101的一侧。在本实施例中，导向套40从下至上依次为，第二套段42、下端面43和第一套段41，其中，第一套段41与安装端抵接，保证安装端不靠近阀头20，且在第一接管31中，导流面32位于下端面43的朝向阀口101的一侧，通过安装端与第一套段41抵接，也确定了导流面32在阀体10内的具体位置。本方案中，将导流面32设置在下端面43的朝向阀口101的一侧，这样可避免第一套段41的侧面和下端面43阻挡流过导流面32的流体，避免对流体产生阻力，从而保证了流体顺畅流动。
具体地，流量调节阀还包括：阀针结构50，阀针结构50包括螺杆51、轴承52和衬套53，螺杆51包括依次连接的第一杆段、第二杆段和第三杆段，第一杆段的外径大于第二杆段的外 径，第二杆段的外径大于第三杆段的外径；轴承52套设在第二杆段上；衬套53套设在第三杆段上，衬套53和第三杆段固定连接，轴承52的内圈的两个端面分别和第一杆段的端面、衬套53的端面抵接，轴承52位于阀头20的腔体内。
在本实施例中，第三杆段为衬套53安装段，与衬套53内孔间隙、过渡或过盈配合，衬套53的一端抵接在轴承52的内圈上，可通过焊接与螺杆51固定为一个整体，第二杆段为轴承52安装段，与轴承52内圈间隙、过渡或过盈配合，轴承52内圈两端分别抵接第一杆段的端面和衬套53，这样通过衬套53实现了对轴承52内圈的轴向限位，避免了轴承52内圈采用其他的限位方式受力过大从而产生变形，保证了轴承52的可靠性，提高了调节阀的性能。
进一步地，在螺杆51的轴向上，第二杆段的长度为M，轴承52内圈的长度为N，N/2≤M＜N。第二杆段的长度略小于轴承52内圈长度，这样可保证衬套53与轴承52抵接，防止轴承52发生轴向移动。
如图7所示，本申请的另一实施例提供了一种流量调节阀，区别在于：导流面32为弧面。在本实施例中，将导流面32设置为弧面，减小了流体通过时产生的流通阻力，并且增大了流体流入时流体与第一接管31安装端处的接触面积。
如图8所示，本申请的另一实施例提供了一种流量调节阀，区别在于：a＝c＝0.5b，导流面32形成圆角。圆角属于实施例二中弧面的一种具体形式，也能起到减小流通阻力的作用，而且可增大流体流入时流体与第一接管31安装端处的接触面积，增大流体流通面积的作用，不同的是，圆角的设计和加工较弧面更简单。
具体的，上述实施例中的流量调节阀为电子膨胀阀。采用上述实施例，通过设置在安装端开口内壁面上的，径向尺寸从内端33到外端34的方向上逐渐减小的环形导流面32，减小了流体流经第一接管31的安装端内时产生的流通阻力，提高电子膨胀阀的流通能力，增大流通流量。而且通过对距离a、b和c的调节，可以将导流面32设置为弧面、锥面或其他形式。具体设计时，可根据电子膨胀阀的实际使用情况对a、b和c的数值进行调整，从而对导流面32进行适应性调整，更进一步提高电子膨胀阀的性能。
如图9至图15所示，本申请的实施例提供了一种流量调节阀，包括：阀体10，阀体10具有阀口101；阀头20，阀头20可移动地设置在阀体10的腔体内，阀头20包括相互连接的杆体21和密封头22，密封头22远离杆体21的一端的设置有第一锥面23，第一锥面23的锥角为a1，100°≤a1≤150°，密封头22用于封堵阀口101。
在本实施例中，通过限定第一锥面23的锥角a1，可以对阀体10的腔体内的流体进行导向，与现有技术中的不设置锥面等导向面的密封头22相比，这样设置减小了阀体10腔体内流体的流动阻力，提高流量调节阀的性能，而且这样设置，不需要再通过扩大阀口101和阀体10的腔体来保证流量调节阀的性能，减小了流量调节阀的体积，降低了加工成本。而且，将第一锥面23的锥角a1限定在上述范围内，既可起到减小阻力的作用，又保证了阀口101在关闭时的密封效果。
具体地，密封头22的径向尺寸大于杆体21的径向尺寸，密封头22与杆体21连接的一端也设置有锥面，减小了阀体10的腔体内流体的流阻，提高了流量调节阀的性能。
如图10和图11所示，密封头22的最大直径为D1，阀口101的最小直径为D2，0.15mm≤D1-D2≤1mm。这样设置，保证密封头22伸入阀口101的长度，同时也保证了阀口101和密封头22形成的密封面的直径大于阀口的最小直径D2，提高密封的可靠性。
如图11所示，阀口101包括相互连通的过流孔段111和密封孔段112，密封孔段112的径向尺寸在过流孔段111朝密封孔段112的方向上逐渐增大，密封孔段112的内壁形成第二锥面113，第二锥面113的锥角为b1，a1＞b1。这样设置，保证密封头22与阀口101的密封面在密封头22与密封孔段112的贴合位置，保证密封的可靠性，防止流体泄露。
具体地，阀口101的最小直径D2即为过流孔段111的直径，密封头22的直径D1大于过流孔段111的直径D2，保证密封的可靠性。
进一步地，阀口101还包括导流孔段114，导流孔段114与密封孔段112远离过流孔段111的一端连通，导流孔段114的径向尺寸在过流孔段111朝密封孔段112的方向上逐渐增大，导流孔段114的内壁形成第三锥面115，第三锥面115的锥角为c1，c1≥b1。这样设置，保证了密封头22在移动过程中不会与导流孔段114发生干涉，保证了密封头22和密封孔段112密封的可靠性，同时这样设置，也能对流向阀口101的流体起到导向作用，降低阀体的腔体内的流体流阻，提高流量调节阀的性能。
如图12和图13所示，阀体10具有容纳腔11，阀头20还包括与杆体21相互连接的导向头24，杆体21的径向尺寸小于导向头24，导向头24的外侧壁与容纳腔11的内侧壁限位配合。这样设置，通过导向头24和容纳腔11之间的配合对阀头20的移动起导向作用，保证阀头20在移动过程中不会发生偏移，保证流量调节阀的可靠性。
进一步地，容纳腔11包括依次连通的限位孔段121、导向孔段122和阀腔123，导向头24可移动地设置在导向孔段122内；流量调节阀还包括阀针结构50，阀针结构50和阀头20连接并穿过限位孔段121设置。这样设置，通过导向头24和导向孔段122的配合对阀头20的移动进行导向，保证阀头20移动的可靠性，同时，阀头20与阀针结构50连接，阀针结构50穿过限位孔段121设置，防止阀针结构50在带动阀头20移动的过程中发生偏移，进一步保证了阀头20移动的可靠性。
具体地，阀体10包括相互连接的主阀座13和辅阀座14，主阀座13的内侧壁具有第一台阶1301，辅阀座14的外侧壁上具有第二台阶141，第一台阶1301和第二台阶141限位配合。
在本实施例中，主阀座13的内侧壁具有第一台阶1301，辅阀座14的外侧壁具有第二台阶141，第二台阶141和第一台阶1301限位配合。第一台阶1301包括主阀座13轴向上的第一台阶面和主阀座13径向上的第二台阶面，第一台阶面和第二台阶面组成第一台阶1301，第二台阶141包括辅阀座14轴向上的第三台阶面和辅阀座14径向上的第四台阶面，第三台阶面和第四台阶面组成第二台阶141，第一台阶面与第三台阶面限位配合，第二台阶面与第四台 阶面限位配合。通过两台阶之间的限位配合，可实现对主阀座13和辅阀座14在轴向和径向上的限位配合。具体地，主阀座的侧壁上开设有流通孔105，以连接外部接管，外部接管与容纳腔11连通。
如图11和图14所示，辅阀座14包括相互连接的辅阀体142和密封垫143，阀口101设置在密封垫143上，辅阀体142的一端具有第一安装槽144，密封垫143设置在第一安装槽144内，第二台阶141位于辅阀体142上。这样设置，无需再使用主阀座13对密封垫143限位，使得主阀座13的壁厚可以做的比较薄，降低了流量调节阀的成本。
进一步地，辅阀体142包括主体1421和设置在主体1421上的环形凸台1422，辅阀体142还包括翻边结构1423，翻边结构1423和环形凸台1422连接，翻边结构1423为环形结构，翻边结构1423和密封垫143限位配合。这样设置，通过翻边结构1423的翻边形式实现对密封垫143的安装，装配操作简单，安装可靠。
具体地，辅阀体142的另一端具有第二安装槽145，以连接外部接管并将外部接管和阀口101连通。
如图15所示，流量调节阀还包括：阀针结构50，阀针结构50包括螺杆51、轴承52和衬套53，螺杆51包括依次连接的、且径向尺寸依次增大的第一杆段511、第二杆段512和第三杆段513，轴承52套设在第二杆段512上，衬套53套设在第一杆段511上并和第一杆段511固定连接，轴承52的内圈的两个端面分别和第三杆段513的端面、衬套53的端面抵接，轴承52和衬套53均位于阀头20的腔体内。
在本实施例中，第一杆段511为衬套53安装段，与衬套53内孔间隙、过渡或过盈配合，衬套53的一端抵接在轴承52的内圈上，可通过焊接与螺杆51固定为一个整体，第二杆段512为轴承52安装段，与轴承52内圈间隙、过渡或过盈配合，轴承52内圈两端分别抵接第三杆段513的端面和衬套53，这样通过衬套53实现了对轴承52内圈的轴向限位，避免了轴承52内圈采用其他的限位方式受力过大从而产生变形，保证了轴承52的可靠性，提高了调节阀的性能。具体地，螺杆51的第三杆段513穿设在限位孔段121内并与限位孔段121间隙配合，保证了螺杆51移动的可靠性。
如图16至图18所示，本申请的实施例提供了一种流量调节阀，包括：阀体10，阀体10具有阀腔123，阀腔123的两端分别具有顶壁102和底壁104，阀腔123的侧壁上设置有与阀腔123连通的流通孔105，流通孔105位于顶壁102和底壁104之间，底壁104设置有与阀腔123连通的阀口101；阀头20，阀头20的至少一部分可移动地设置在阀腔123内，以打开或关闭阀口101；其中，顶壁102和阀腔123的侧壁的连接处具有弧形面16，在阀体10轴线所在的截面上，弧形面16的弧线的曲率半径为R，1mm≤R≤5mm。
在本实施例中，将顶壁102和阀腔123的侧壁之间的连接处设置成弧形面16，通过弧形面16对流入阀腔123内的流体进行导向，降低阀腔123内流体流动的流阻，提高流体流动的效率；对弧形面16的曲率半径R进行限定，在R＜1mm时，弧形面16的尺寸过小，不能起到导流的作用，当R＞5mm时，弧形面16过大，影响阀腔123的容积，故将R限定在1mm 到5mm之间，在不影响阀体10整体结构的情况下，对流入阀腔123内的流体进行导流，提高了流量调节阀的性能。而且这样设置，不需要再通过扩大阀口101和阀腔123来保证流量调节阀的性能，减小了流量调节阀的体积，降低了加工成本。
具体地，弧形面16为球面的一部分。这样设置，曲率半径R即为球面的半径，便于弧形面16的加工。
流量调节阀还包括：第一接管31，第一接管31的一端设置在流通孔105内，第一接管31与阀腔123连通，第一接管31的轴线垂直于阀体10的轴线设置，第一接管31的内壁和顶壁102在阀体10轴向上的最短距离为A，A≤1mm。这样设置，通过对A的尺寸进行限定，可以降低第一接管31流入阀腔123的流体的阻力，增大第一接管31流入阀腔123的流体的流量，提高流量调节阀的性能。
阀头20具有相互连接的导向头24、杆体21和密封头22，杆体21的径向尺寸小于导向头24、密封头22的径向尺寸，阀体10还具有与阀腔123连通的导向孔段122，导向头24与导向孔段122限位配合，密封头22用以封堵阀口101，在阀口101处于打开的情况下，导向头24全部位于导向孔段122内。
在本实施例中，若阀口101全开的情况下，导向头24的一部分位于阀腔123内，导向头24的径向尺寸大于杆体21的径向尺寸，流体从第一接管31流入到阀腔123后分别与导向头24、杆体21接触，这样会导致阀腔123内流体的流阻变大。使导向头24在阀口101打开的情况下全部处于导向孔段122内，这样设置，降低了阀腔123内流体的流阻，进一步提高了流量调节阀的性能。
阀口101包括依次连接的导流孔段114、密封孔段112和过流孔段111，导流孔段114的径向尺寸在过流孔段111朝密封孔段112的方向上逐渐增大，密封孔段112的径向尺寸在过流孔段111朝密封孔段112的方向上逐渐增大，在阀口101处于关闭的情况下，密封头22与密封孔段112抵接。这样设置，流体通过导流孔段114的导向作用流经密封孔段112并最终流入过流孔段111，通过设置导流孔段114，提高了流体的流动效率；并且在阀口101处于关闭的状态下，密封头22与阀口101的密封孔段112贴合形成密封面，从而关闭阀口101，保证了封堵的可靠性。
可选地，导流孔段114的开口角度大于密封孔段112的开口角度，这样设置，可以同时保证封堵的可靠性和流体的流动效率。
导向头24的外侧壁具有环形槽241，流量调节阀包括环形密封圈3，环形密封圈3设置在环形槽241内，环形密封圈3的外圈与导向孔段122的内侧壁密封配合。
具体地，流量调节阀还包括阀筒60，阀筒60的一端和主阀座13远离辅阀座14的一端连接，阀筒60的腔体为密封腔61，密封腔61与阀腔123连通。在本实施例中，导向头24的外侧壁的环形槽241内设置有环形密封圈3，可以保证阀腔123内的流体不会通过导向头24的 外侧壁和导流孔段114的内侧壁之间的间隙进入阀筒60的密封腔61内，保证流量调节阀的可靠性。
阀体10包括相互连接的主阀座13和辅阀座14，底壁104位于辅阀座14上，顶壁102位于主阀座13上，主阀座13的内侧壁具有第一台阶1301，辅阀座14的外侧壁上具有第二台阶141，第一台阶1301和第二台阶141限位配合。
在本实施例中，主阀座13的内壁具有第一台阶1301，辅阀座14的外壁具有第二台阶141，第二台阶141和第一台阶1301限位配合。第一台阶1301包括主阀座13轴向上的第一台阶面和主阀座13径向上的第二台阶面，第一台阶面和第二台阶面组成第一台阶1301，第二台阶141包括辅阀座14轴向上的第三台阶面和辅阀座14径向上的第四台阶面，第三台阶面和第四台阶面组成第二台阶141，第一台阶面与第三台阶面限位配合，第二台阶面与第四台阶面限位配合。通过两台阶之间的限位配合，可实现对主阀座13和辅阀座14在轴向和径向上的限位配合。
辅阀座14包括相互连接的辅阀体142和密封垫143，阀口101设置在密封垫143上，辅阀体142的一端具有第一安装槽，密封垫143设置在第一安装槽内。这样设置，无需再使用主阀座13对密封垫143限位，使得主阀座13的壁厚可以做的比较薄，降低了流量调节阀的成本。
具体地，辅阀体142包括依次连接的筒体、环形凸台和翻边结构，翻边结构为环形结构，翻边结构和密封垫143限位配合。通过设置翻边结构，通过翻边的形式实现对密封垫143的安装，装配操作简单，安装可靠。
进一步地，辅阀体142的另一端具有第二安装槽145，流量调节阀还包括第二接管35，第二接管35的一端穿设在第二安装槽145内，第二接管35与阀口101连通。
在本实施例中，流体从第一接管31流入到阀腔123内，再经与阀腔123连通的阀口101流入第二接管35，最后从第二接管35流出。具体地，流通孔105设置在阀腔123的内侧壁上，第一接管31和第二接管35的轴线垂直设置。这样设置，可以提高流体的流动能力，提高流量调节阀的性能。
流量调节阀还包括：阀针结构50，阀针结构50包括螺杆51、轴承52和衬套53，螺杆51包括依次连接的、且径向尺寸依次增大的第一杆段511、第二杆段512和第三杆段513，轴承52套设在第二杆段512上，衬套53套设在第一杆段511上并和第一杆段511固定连接，轴承52的内圈的两个端面分别和第三杆段513的端面、衬套53的端面抵接，轴承52和衬套53均位于阀头20的腔体内。
在本实施例中，第一杆段511为衬套53安装段，与衬套53内孔间隙、过渡或过盈配合，衬套53的一端抵接在轴承52的内圈上，可通过焊接与螺杆51固定为一个整体，第二杆段512为轴承52安装段，与轴承52内圈间隙、过渡或过盈配合，轴承52内圈两端分别抵接第三杆段513的端面和衬套53，这样通过衬套53实现了对轴承52内圈的轴向限位，避免了轴承52 内圈采用其他的限位方式受力过大从而产生变形，保证了轴承52的可靠性，提高了调节阀的性能。
在本申请的另一实施例中，流量调节阀，包括：主阀座13，主阀座13具有容纳腔11；辅阀座14，辅阀座14包括相互连接的辅阀体142和密封垫143，辅阀体142和主阀座13连接，密封垫143具有阀口101，阀口101与容纳腔11连通，辅阀体142远离阀口101的一端具有第二安装槽145；阀头20，阀头20可移动地设置在容纳腔11内，以封堵或打开阀口101；第二接管35，第二接管35的一端设置在第二安装槽145内，第二接管35和阀口101连通；其中，阀口101的流通面积为S1，第二接管35的流通面积为S2，|S1-S2|≤0.15S1。
在本实施例中，通过将阀口101的流通面积S1和第二接管35的流通面积S2之间的关系进行限定，可以降低容纳腔11内的流体在通过阀口101进入第二接管35时的流阻，提高流体的流动性，增大流体流量，进而提高了流量调节阀的性能。而且这样设置，不需要再采用通过扩大阀口101和容纳腔11的方式来保证流量调节阀的性能，减小了流量调节阀的体积，降低了加工成本。
辅阀体142还具有连接孔212和第一安装槽144，密封垫143设置在第一安装槽144内，阀口101、连接孔212和第二接管35依次连通，连接孔212的流通面积为S3，|S1-S3|≤0.15S1。
在本实施例中，连接孔212位于阀口101和第二接管35之间，通过对连接孔212的流通面积S3和阀口101的流通面积S1之间的关系进行限定，降低了通过阀口101流入连接孔212内的流体的阻力，保证连接孔212不会对通过阀口101的流体产生影响，提高了流量调节阀内流体的流动性，提高了流量调节阀的性能。
阀口101的最小直径为D2，第二接管35的内径为D4，连接孔212的内径为D3，D3≥D2，D3≥D4。这样设置，保证第二安装槽145和连接孔212形成的第一阶梯面能够对第二接管35插入的深度进行限位，保证第一安装槽144和连接孔212形成的第二阶梯面能够对密封垫143插入的深度进行限位，同时防止了密封垫143和第二接管35在安装过程中出现干涉，保证了流量调节阀的稳定性和可靠性。而且，连接孔212不会对流体的流动造成阻碍。
具体地，流通面积S1即为D2所在位置的面积，流通面积S2即为D4所在位置的面积，流通面积S3即为D3所在位置的面积。
进一步地，辅阀体142包括主体1421和设置在主体1421上的环形凸台1422，辅阀体142还包括翻边结构1423，翻边结构1423和环形凸台1422连接，主体1421的一部分和环形凸台1422围绕形成第一安装槽144，翻边结构1423的壁厚小于环形凸台1422的壁厚，翻边结构1423和密封垫143限位配合。
在本实施例中，密封垫143通过翻边结构1423固定在主体1421和环形凸台1422内，避免密封垫143在辅阀体142内晃动、转动，同时也避免了密封垫143因受到较大的径向力而变形，而且这样设置，无需再使用主阀座13对密封垫143限位，这样主阀座13的壁厚可以做的比较薄，并且采用翻边的形式便于装配操作，从而降低了流量调节阀的成本。
具体地，环形凸台1422的壁厚小于主体1421的壁厚，这样设置，使得环形凸台1422的壁厚大于翻边结构1423的壁厚并小于主体1421的壁厚，保证翻边结构1423的顺利翻边，避免翻边时对密封垫143造成影响，并且不容易导致密封垫143受力发生形变。
翻边结构1423为环形结构，翻边结构1423与密封垫143贴合，翻边结构1423的内周面和阀口101之间的距离为a2，0.2mm≤a2≤2mm。
在本实施例中，通过对a2的限定，保证了翻边结构1423的可靠性。若a2＜0.2mm，则会使翻边结构1423过长，导致翻边结构1423翻边折弯位置易发生损坏；若a2＞2mm，则会使翻边结构1423过短，导致翻边结构1423翻边后与密封垫143贴合面积过小，不能保证对密封垫143的压紧，降低了辅阀座的可靠性。
具体地，翻边结构1423的内周面即为翻边结构1423与密封垫143贴合后，翻边结构1423朝向阀口101轴线的环形面。
阀头20具有容纳孔，阀针结构50包括：螺杆51，螺杆51包括依次连接且径向尺寸依次增大的第一杆段511、第二杆段512和第三杆段513；衬套53，衬套53套设在第一杆段511上并与第一杆段511固定连接，衬套53位于容纳孔内；轴承52，轴承52套设在第二杆段512上，轴承52的内圈的两端分别和第三杆段513的端面、衬套53的端面抵接，轴承52的侧壁和容纳孔的侧壁限位配合；压套54，压套54的容纳孔固定连接，压套54的一端与轴承52的外圈朝向第三杆段513的端面抵接。
在本实施例中，第一杆段511为衬套53安装段，与衬套53内孔间隙、过渡或过盈配合，衬套53的一端抵接在轴承52的内圈上，可通过焊接与螺杆51固定为一个整体，第二杆段512为轴承52安装段，与轴承52内圈间隙、过渡或过盈配合，轴承52内圈两端分别抵接第三杆段513的端面和衬套53，这样通过衬套53实现了对轴承52内圈的轴向限位，避免了轴承52内圈采用其他的限位方式受力过大从而产生变形，保证了轴承52的可靠性，提高了调节阀的性能。
以上所述仅为本申请的优选实施例而已，并不用于限制本申请，对于本领域的技术人员来说，本申请可以有各种更改和变化。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (37)

  1. 一种阀头结构，设置在流量调节阀的阀体(10)内，用于关闭或者避让所述阀体(10)的阀口(101)，其特征在于，所述阀头结构包括：
    阀头(20)，所述阀头(20)可移动地设置在所述阀体(10)内；
    容纳槽(2)，所述容纳槽(2)设置在所述阀头(20)上，所述容纳槽(2)用于容纳所述阀体(10)内的流体；
    其中，所述阀头(20)与所述阀口(101)之间的距离可调节地设置，当所述阀头(20)移动至与所述阀口(101)之间的距离最大的位置时，所述容纳槽(2)的至少部分位于所述阀体(10)的容纳腔(11)内。
  2. 根据权利要求1所述的阀头结构，其特征在于，所述容纳槽(2)环绕所述阀头(20)设置；和/或，所述容纳槽(2)为环形结构。
  3. 根据权利要求1所述的阀头结构，其特征在于，所述容纳槽(2)具有第一过渡段(201)，所述第一过渡段(201)位于所述容纳槽(2)远离所述阀口(101)的一端；沿所述阀头(20)靠近所述阀口(101)的方向，所述第一过渡段(201)的横截面积逐渐减小。
  4. 根据权利要求1所述的阀头结构，其特征在于，所述阀头(20)包括用于封堵所述阀口(101)的密封头(22)，所述密封头(22)设置在所述容纳槽(2)靠近所述阀口(101)的一端。
  5. 根据权利要求4所述的阀头结构，其特征在于，所述容纳槽(2)具有第二过渡段(202)，所述第二过渡段(202)位于所述容纳槽(2)靠近所述密封头(22)的一端；沿所述容纳槽(2)靠近所述密封头(22)的方向，所述第二过渡段(202)的横截面积逐渐增大。
  6. 根据权利要求1所述的阀头结构，其特征在于，所述阀头(20)包括容纳腔体(120)，所述容纳腔体(120)用于容纳所述容纳腔(11)内的流体，所述阀头(20)包括流通通道(103)，所述流通通道(103)的一端与所述容纳腔体(120)连通，所述流通通道(103)的另一端与所述容纳腔(11)连通。
  7. 根据权利要求6所述的阀头结构，其特征在于，所述流通通道(103)包括第一流通通道(131)和第二流通通道(132)，所述第一流通通道(131)与所述容纳腔体(120)连通，所述第二流通通道(132)用于与所述容纳腔(11)连通；沿所述阀头(20)的延伸方向，所述第二流通通道(132)的横截面积大于所述第一流通通道(131)的横截面积。
  8. 根据权利要求6所述的阀头结构，其特征在于，所述容纳腔体(120)延伸至所述阀头(20)远离所述阀口(101)的一端，以使所述容纳腔(11)内的流体经过所述容纳腔体(120)由所述阀头(20)靠近所述阀口(101)的一侧流动至所述阀头(20)远离所述阀口(101)的一侧。
  9. 根据权利要求1所述的阀头结构，其特征在于，所述阀头(20)靠近所述阀口(101)的一端具有用于封堵所述阀口(101)的密封头(22)，所述阀头(20)远离所述阀口(101) 的一端具有用于与所述阀体(10)接触的导向头(24)，所述密封头(22)与所述导向头(24)均为圆柱形结构，所述密封头(22)与所述阀口(101)所形成的密封线直径与所述导向头(24)的外径相等。
  10. 一种流量调节阀，包括阀头结构，其特征在于，所述阀头结构为权利要求1至9中任一项所述的阀头结构。
  11. 根据权利要求10所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    阀体(10)，所述阀体(10)的径向具有接口，所述阀体(10)的轴向具有阀口(101)，所述阀头(20)可移动地设置在所述阀体(10)的腔体内，以打开或关闭所述阀口(101)；
    第一接管(31)，所述第一接管(31)的一端为安装端，所述安装端从所述接口穿入所述阀体(10)的腔体内，所述安装端的开口的内壁面为环形的导流面(32)；所述导流面(32)位于所述安装端的端面的一端为内端(33)，所述导流面(32)位于所述第一接管(31)内部的一端为外端(34)，在从所述内端(33)到所述外端(34)的方向上，所述导流面(32)的径向尺寸逐渐减小；
    其中，所述导流面(32)在内端(33)与所述第一接管(31)的外壁面之间的距离为a，所述导流面(32)在外端(34)与所述第一接管(31)的外壁面之间的距离为b，所述内端(33)和所述外端(34)之间的距离为c，0.1b≤a≤0.5b，0.5b≤c≤4b。
  12. 根据权利要求11所述的流量调节阀，其特征在于，0.25b≤a≤0.4b，b≤c≤3b。
  13. 根据权利要求11所述的流量调节阀，其特征在于，所述导流面(32)为锥面或弧面。
  14. 根据权利要求11所述的流量调节阀，其特征在于，a＝c＝0.5b，所述导流面(32)形成圆角。
  15. 根据权利要求11所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    导向套(40)，设置在所述阀体(10)的腔体内，所述阀头(20)可移动地设置在所述导向套(40)内，所述安装端和所述导向套(40)抵接。
  16. 根据权利要求15所述的流量调节阀，其特征在于，所述导向套(40)包括第一套段(41)和第二套段(42)，所述第二套段(42)的外径小于所述第一套段(41)的外径，所述第二套段(42)和所述第一套段(41)的下端面(43)连接，所述第二套段(42)相对于所述第一套段(41)靠近所述阀口(101)，所述安装端和所述第一套段(41)抵接；在所述阀头(20)的轴向上，所述导流面(32)位于所述下端面(43)的朝向所述阀口(101)的一侧。
  17. 根据权利要求11所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    阀针结构(50)，所述阀针结构(50)包括螺杆(51)、轴承(52)和衬套(53)，所述螺杆(51)包括依次连接的第一杆段、第二杆段和第三杆段，所述第一杆段的外径 大于所述第二杆段的外径，所述第二杆段的外径大于所述第三杆段的外径；所述轴承(52)套设在所述第二杆段上；所述衬套(53)套设在所述第三杆段上，所述衬套(53)和所述第三杆段固定连接，所述轴承(52)的内圈的两个端面分别和所述第一杆段的端面、所述衬套(53)的端面抵接，所述轴承(52)位于所述阀头(20)的腔体内。
  18. 根据权利要求10所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    阀体(10)，所述阀体(10)具有阀口(101)，所述阀头(20)可移动地设置在所述阀体(10)的腔体内，所述阀头(20)包括相互连接的杆体(21)和密封头(22)，所述密封头(22)远离所述杆体(21)的一端的设置有第一锥面(23)，所述第一锥面(23)的锥角为a1，100°≤a1≤150°，所述密封头(22)用于封堵所述阀口(101)。
  19. 根据权利要求18所述的流量调节阀，其特征在于，所述密封头(22)的径向尺寸大于所述杆体(21)的径向尺寸，所述密封头(22)的最大直径为D1，所述阀口(101)的最小直径为D2，0.15mm≤D1-D2≤1mm。
  20. 根据权利要求18所述的流量调节阀，其特征在于，所述阀口(101)包括相互连通的过流孔段(111)和密封孔段(112)，所述密封孔段(112)的径向尺寸在所述过流孔段(111)朝所述密封孔段(112)的方向上逐渐增大，所述密封孔段(112)的内壁形成第二锥面(113)，所述第二锥面(113)的锥角为b1，a1＞b1。
  21. 根据权利要求20所述的流量调节阀，其特征在于，所述阀口(101)还包括导流孔段(114)，所述导流孔段(114)与所述密封孔段(112)远离所述过流孔段(111)的一端连通，所述导流孔段(114)的径向尺寸在所述过流孔段(111)朝所述密封孔段(112)的方向上逐渐增大，所述导流孔段(114)的内壁形成第三锥面(115)，所述第三锥面(115)的锥角为c1，c1≥b1。
  22. 根据权利要求18所述的流量调节阀，其特征在于，所述阀体(10)具有容纳腔(11)，所述阀头(20)还包括与所述杆体(21)相互连接的导向头(24)，所述杆体(21)的径向尺寸小于所述导向头(24)，所述导向头(24)的外侧壁与所述容纳腔(11)的内侧壁限位配合。
  23. 根据权利要求22所述的流量调节阀，其特征在于，所述容纳腔(11)包括依次连通的限位孔段(121)、导向孔段(122)和阀腔(123)，所述导向头(24)可移动地设置在所述导向孔段(122)内；所述流量调节阀还包括阀针结构(50)，所述阀针结构(50)和所述阀头(20)连接并穿过所述限位孔段(121)设置。
  24. 根据权利要求18所述的流量调节阀，其特征在于，所述阀体(10)包括相互连接的主阀座(13)和辅阀座(14)，所述主阀座(13)的内侧壁具有第一台阶(1301)，所述辅阀座(14)的外侧壁上具有第二台阶(141)，所述第一台阶(1301)和所述第二台阶(141)限位配合。
  25. 根据权利要求24所述的流量调节阀，其特征在于，所述辅阀座(14)包括相互连接的辅阀体(142)和密封垫(143)，所述阀口(101)设置在所述密封垫(143)上，所述辅阀体(142)的一端具有第一安装槽(144)，所述密封垫(143)设置在所述第一安装槽(144)内，所述第二台阶(141)位于所述辅阀体(142)上。
  26. 根据权利要求25所述的流量调节阀，其特征在于，所述辅阀体(142)包括主体(1421)和设置在所述主体(1421)上的环形凸台(1422)，所述辅阀体(142)还包括翻边结构(1423)，所述翻边结构(1423)和所述环形凸台(1422)连接，所述翻边结构(1423)为环形结构，所述翻边结构(1423)和所述密封垫(143)限位配合。
  27. 根据权利要求10所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    阀体(10)，所述阀体(10)具有阀腔(123)，所述阀腔(123)的两端分别具有顶壁(102)和底壁(104)，所述阀腔(123)的侧壁上设置有与所述阀腔(123)连通的流通孔(105)，所述流通孔(105)位于所述顶壁(102)和所述底壁(104)之间，所述底壁(104)设置有与所述阀腔(123)连通的阀口(101)，所述阀头(20)的至少一部分可移动地设置在所述阀腔(123)内，以打开或关闭所述阀口(101)；
    其中，所述顶壁(102)和所述阀腔(123)的侧壁的连接处具有弧形面(16)，在所述阀体(10)轴线所在的截面上，所述弧形面(16)的弧线的曲率半径为R，1mm≤R≤5mm。
  28. 根据权利要求27所述的流量调节阀，其特征在于，所述弧形面(16)为球面的一部分。
  29. 根据权利要求27所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    第一接管(31)，所述第一接管(31)的一端设置在所述流通孔(105)内，所述第一接管(31)与所述阀腔(123)连通，所述第一接管(31)的轴线垂直于所述阀体(10)的轴线设置，所述第一接管(31)的内壁和所述顶壁(102)在所述阀体(10)轴向上的最短距离为A，A≤1mm。
  30. 根据权利要求27所述的流量调节阀，其特征在于，所述阀头(20)具有相互连接的导向头(24)、杆体(21)和密封头(22)，所述杆体(21)的径向尺寸小于所述导向头(24)、所述密封头(22)的径向尺寸，所述阀体(10)还具有与所述阀腔(123)连通的导向孔段(122)，所述导向头(24)与所述导向孔段(122)限位配合，所述密封头(22)用于封堵所述阀口(101)，在所述阀口(101)处于打开的情况下，所述导向头(24)全部位于所述导向孔段(122)内。
  31. 根据权利要求30所述的流量调节阀，其特征在于，所述阀口(101)包括依次连接的导流孔段(114)、密封孔段(112)和过流孔段(111)，所述导流孔段(114)的径向尺寸在所述过流孔段(111)朝所述密封孔段(112)的方向上逐渐增大，所述密封孔段(112)的径向尺寸在所述过流孔段(111)朝所述密封孔段(112)的方向上逐渐增大，在所述阀口(101)处于关闭的情况下，所述密封头(22)与所述密封孔段(112)抵接。
  32. 根据权利要求30所述的流量调节阀，其特征在于，所述导向头(24)的外侧壁具有环形槽(241)，所述流量调节阀包括环形密封圈(3)，所述环形密封圈(3)设置在所述环形槽(241)内，所述环形密封圈(3)的外圈与所述导向孔段(122)的内侧壁密封配合。
  33. 根据权利要求10所述的流量调节阀，其特征在于，所述流量调节阀还包括：
    主阀座(13)，所述主阀座(13)具有容纳腔(11)；
    辅阀座(14)，所述辅阀座(14)包括相互连接的辅阀体(142)和密封垫(143)，所述辅阀体(142)和所述主阀座(13)连接，所述密封垫(143)具有阀口(101)，所述阀口(101)与所述容纳腔(11)连通，所述辅阀体(142)远离所述阀口(101)的一端具有第二安装槽(145)，所述阀头(20)可移动地设置在所述容纳腔(11)内，以封堵或打开所述阀口(101)；
    第二接管(35)，所述第二接管(35)的一端设置在所述第二安装槽(145)内，所述第二接管(35)和所述阀口(101)连通；
    其中，所述阀口(101)的流通面积为S1，所述第二接管(35)的流通面积为S2，|S1-S2|≤0.15S1。
  34. 根据权利要求33所述的流量调节阀，其特征在于，所述辅阀体(142)还具有连接孔(212)和第一安装槽(144)，所述密封垫(143)设置在所述第一安装槽(144)内，所述阀口(101)、所述连接孔(212)和所述第二接管(35)依次连通，所述连接孔(212)的流通面积为S3，|S1-S3|≤0.15S1。
  35. 根据权利要求34所述的流量调节阀，其特征在于，所述阀口(101)的最小直径为D2，所述第二接管(35)的内径为D4，所述连接孔(212)的内径为D3，D3≥D2，D3≥D4。
  36. 根据权利要求34所述的流量调节阀，其特征在于，所述辅阀体(142)包括主体(1421)和设置在所述主体(1421)上的环形凸台(1422)，所述辅阀体(142)还包括翻边结构(1423)，所述翻边结构(1423)和所述环形凸台(1422)连接，所述主体(1421)的一部分和所述环形凸台(1422)围绕形成所述第一安装槽(144)，所述翻边结构(1423)的壁厚小于所述环形凸台(1422)的壁厚，所述翻边结构(1423)和所述密封垫(143)限位配合。
  37. 根据权利要求36所述的流量调节阀，其特征在于，所述翻边结构(1423)为环形结构，所述翻边结构(1423)与所述密封垫(143)贴合，所述翻边结构(1423)的内周面和所述阀口(101)之间的距离为a2，0.2mm≤a2≤2mm。
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