CN112856007B - Throttle valve - Google Patents

Throttle valve Download PDF

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Publication number
CN112856007B
CN112856007B CN201911192999.3A CN201911192999A CN112856007B CN 112856007 B CN112856007 B CN 112856007B CN 201911192999 A CN201911192999 A CN 201911192999A CN 112856007 B CN112856007 B CN 112856007B
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China
Prior art keywords
valve
mounting structure
valve seat
port
hole
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Application number
CN201911192999.3A
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Chinese (zh)
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CN112856007A (en
Inventor
宋治国
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang DunAn Hetian Metal Co Ltd
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Zhejiang DunAn Hetian Metal Co Ltd
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Priority to CN201911192999.3A priority Critical patent/CN112856007B/en
Publication of CN112856007A publication Critical patent/CN112856007A/en
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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
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/20—Excess-flow valves
    • F16K17/34—Excess-flow valves in which the flow-energy of the flowing medium actuates the closing mechanism
    • 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
    • F16K1/44—Details of seats or valve members of double-seat valves
    • 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
    • F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped 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
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/04—Means in valves for absorbing fluid energy for decreasing pressure or noise level, the throttle being incorporated in the closure member
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention provides a throttle valve. The throttle valve includes: a valve body having a first flow port and a second flow port; the valve needle assembly is positioned in the valve body and comprises a valve needle and a mounting structure fixedly connected with the valve needle, the valve needle is connected with the valve body through the mounting structure, and the mounting structure is provided with a circulation channel; the valve seat is arranged in the valve body in a sliding mode, at least one valve seat is positioned between the mounting structure and the first circulation port, at least one valve seat is positioned between the mounting structure and the second circulation port, each valve seat is provided with a through hole and a valve port, the valve needle can extend into the valve port, and the flow of the through holes is larger than that of the valve ports; the plugging piece is positioned between the mounting structure and the valve seat, and moves towards the valve seat under the pushing of the fluid so as to plug the through hole; wherein, at least part valve seat and at least part mounting structure are made by magnetic material, and the mounting structure can exert magnetic attraction to the valve seat. The invention solves the problem that the structure of the throttle valve is more complicated in the prior art.

Description

Throttle valve
Technical Field
The invention relates to the technical field of valve bodies, in particular to a throttling valve.
Background
Currently, throttle valves are used primarily to throttle the refrigerant flowing therethrough. The bidirectional throttle valve is mainly applied to a cooling and heating type air conditioning system. In the prior art, two throttle valves are typically connected in parallel to form a two-way throttle valve.
However, the arrangement results in more parts of the bidirectional throttle valve, the structure is complex, the disassembly and the assembly are difficult, and the disassembly and the assembly difficulty of workers are increased.
Disclosure of Invention
The invention mainly aims to provide a throttle valve to solve the problems that the throttle valve in the prior art is complex in structure and difficult to assemble and disassemble.
In order to achieve the above object, the present invention provides a throttle valve comprising: a valve body having a first flow port and a second flow port; the valve needle assembly is positioned in the valve body and comprises a valve needle and a mounting structure fixedly connected with the valve needle, the valve needle is connected with the valve body through the mounting structure, and the mounting structure is provided with a circulation channel; the valve seat is arranged in the valve body in a sliding mode, at least one valve seat is positioned between the mounting structure and the first circulation port, at least one valve seat is positioned between the mounting structure and the second circulation port, each valve seat is provided with a through hole and a valve port, the valve needle can extend into the valve port, and the flow of the through holes is larger than that of the valve ports; the plugging piece is positioned between the mounting structure and the valve seat, and moves towards the valve seat under the pushing of fluid so as to plug the through hole; wherein, at least part valve seat and at least part mounting structure are made by magnetic material, and the mounting structure can exert magnetic attraction to the valve seat.
Furthermore, the second circulation port and the first circulation port are respectively located on two sides of the mounting structure, the number of the blocking pieces is at least two, at least one blocking piece is located between the second circulation port and the mounting structure, and at least one blocking piece is located between the first circulation port and the mounting structure.
Furthermore, the plugging piece is provided with a mounting through hole, the valve needle is arranged in the mounting through hole in a penetrating mode, the mounting through hole is communicated with the circulation channel, and the mounting through hole can be communicated with the valve port.
Further, the circulation channel is a plurality of, and a plurality of circulation channels are arranged around the circumference interval of needle.
Further, the valve body has first joint portion, and mounting structure has second joint portion, the spacing backstop of first joint portion and second joint portion to realize being connected of mounting structure and valve body.
Further, the at least two valve seats include a first valve seat and a second valve seat, the first valve seat being located between the first flow port and the mounting structure, the second valve seat being located between the second flow port and the mounting structure; the at least two plugging pieces comprise a first plugging piece and a second plugging piece, the first plugging piece is located between the mounting structure and the first valve seat, and the second plugging piece is located between the second valve seat and the mounting structure.
Further, the first valve seat and the mounting structure are a pair of magnetic poles that attract each other, and the second valve seat and the mounting structure are a pair of magnetic poles that attract each other.
Furthermore, the valve body is provided with a first necking section and a second necking section, the first necking section can limit and stop with the first valve seat, and the second necking section can limit and stop with the second valve seat; wherein the first throat section has a first flow opening and the second throat section has a second flow opening.
Further, the through holes of each valve seat are multiple, and the multiple through holes are arranged at intervals around the valve port of the valve seat.
Furthermore, each valve seat is also provided with a mounting hole, and the valve port is mounted in the mounting hole along the direction from the mounting structure to the first circulation port or the second circulation port.
By applying the technical scheme of the invention, after fluid enters the first circulation port, the valve seat between the mounting structure and the first circulation port is pushed to slide towards the mounting structure until the valve needle blocks the valve port, the fluid enters the circulation channel through the through hole of the valve seat, the fluid discharged from the circulation channel pushes the valve seat and the blocking piece between the mounting structure and the second circulation port to move towards one side far away from the mounting structure, the blocking piece blocks the through hole of the valve seat, the fluid enters the valve port of the valve seat and is discharged out of the valve body through the valve port and the second circulation port in sequence, and the purpose of throttling the fluid by the throttling valve is further realized. In this way, during the process of fluid passing through the throttling valve, the mounting structure can apply magnetic attraction force to the valve seat so as to increase the damping force applied to the valve seat and prevent the valve seat from moving towards the side far away from the mounting structure under the pushing of the fluid to influence the normal use of the throttling valve.
Compared with the throttle valve in the prior art, the throttle valve in the application has the advantages that the structure is simple, the throttle valve is easy to process and realize, the difficulty in dismounting the throttle valve is reduced, the problems that the structure of the throttle valve is complex and the dismounting is difficult in the prior art are solved, and the labor intensity of workers is reduced.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 shows a cross-sectional view of an embodiment of a throttle valve according to the present invention;
FIG. 2 shows a front view of a valve needle assembly of the throttle valve of FIG. 1;
figure 3 shows a top view of the valve needle assembly of figure 2;
figure 4 shows a cross-sectional view of the valve needle assembly of figure 2; and
fig. 5 shows a top view of the valve seat of the throttle valve in fig. 1.
Wherein the figures include the following reference numerals:
10. a valve body; 11. a first circulation port; 12. a second flow port; 13. a first clamping part; 14. a first throat section; 15. a second throat section; 20. a valve needle assembly; 21. a valve needle; 22. a mounting structure; 221. a second clamping part; 23. a flow-through channel; 30. a valve seat; 31. a via hole; 32. a valve port; 33. a first valve seat; 34. a second valve seat; 35. mounting holes; 40. a blocking piece; 41. mounting a through hole; 42. a first blocking member; 43. a second closure.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
In the present invention, unless stated to the contrary, use of the directional terms "upper and lower" are generally directed to the orientation shown in the drawings, or to the vertical, or gravitational direction; likewise, for ease of understanding and description, "left and right" are generally directed to the left and right as shown in the drawings; "inner and outer" refer to the inner and outer relative to the profile of the respective member itself, but the above directional terms are not intended to limit the present invention.
In order to solve the problem that the structure of throttle valve is comparatively complicated and the dismouting is comparatively difficult among the prior art, this application provides a throttle valve.
As shown in fig. 1 to 5, the throttle valve includes a valve body 10, a valve needle assembly 20, two valve seats 30, and a blocking member 40. The valve body 10 has a first communication port 11 and a second communication port 12. A valve needle assembly 20 is located in the valve body 10, the valve needle assembly 20 comprising a valve needle 21 and a mounting structure 22 fixedly connected to the valve needle 21, the valve needle 21 being connected to the valve body 10 via the mounting structure 22, the mounting structure 22 having a flow-through passage 23. Two valve seats 30 are slidably disposed in the valve body 10, one valve seat 30 is located between the mounting structure 22 and the first through-hole 11, one valve seat 30 is located between the mounting structure 22 and the second through-hole 12, each valve seat 30 is provided with a through-hole 31 and a valve port 32, the valve needle 21 can extend into the valve port 32, and the flow rate of the through-hole 31 is greater than that of the valve port 32. The blocking member 40 is positioned between the mounting structure 22 and the valve seat 30, and the blocking member 40 moves toward the valve seat 30 to block the through hole 31 when pushed by the fluid. Wherein at least a portion of the valve seat 30 and at least a portion of the mounting structure 22 are made of a magnetic material, and the mounting structure 22 can apply a magnetic attraction force to the valve seat 30.
By applying the technical solution of the embodiment, after the fluid enters the first through hole 11, the valve seat 30 located between the mounting structure 22 and the first through hole 11 is pushed to slide towards the mounting structure 22 until the valve needle 21 blocks the valve port 32, the fluid enters the flow channel 23 through the through hole 31 of the valve seat 30, the fluid discharged from the flow channel 23 pushes the valve seat 30 and the blocking piece 40 located between the mounting structure 22 and the second through hole 12 to move towards the side away from the mounting structure 22, the blocking piece 40 blocks the through hole 31 of the valve seat 30, the fluid enters the valve port 32 of the valve seat 30 and is discharged to the outside of the valve body 10 through the valve port 32 and the second through hole 12 in sequence, and the purpose of throttling the fluid is achieved. Thus, during the passage of fluid through the choke, the mounting structure 22 may apply a magnetic attraction force to the valve seat 30 to increase the damping force experienced by the valve seat 30 to prevent the valve seat 30 from immediately moving toward the side away from the mounting structure 22 under the urging of the fluid and affecting the normal use of the choke.
Compared with the complex structure of the throttle valve in the prior art, the throttle valve in the embodiment has the advantages of simple structure, easy processing and realization, reduces the difficulty in dismounting the throttle valve, further solves the problems of complex structure and difficult dismounting of the throttle valve in the prior art, and reduces the labor intensity of workers.
Alternatively, the valve needle 21 and the mounting structure 22 are fixedly connected by interference fit, welding, or the like.
In this embodiment, because the flow rate of the through hole 31 is greater than the flow rate of the valve port 32, and the fluid entering from the through hole 31 is discharged through the valve port 32, the throttling purpose of the throttle valve is further achieved, and the throttle valve is ensured to generate a throttling effect.
In the present embodiment, the plugging member 40 is provided to open and close the through hole 31, and the flow rate of the through hole 31 is greater than the flow rate between the mounting structure 22 and the plugging member 40 and is also greater than the flow rate at the valve port 32 and the valve needle 21.
As shown in fig. 1, the second communication port 12 and the first communication port 11 are respectively located on both sides of the mounting structure 22, and there are two blocking members 40, one blocking member 40 being located between the second communication port 12 and the mounting structure 22, and one blocking member 40 being located between the first communication port 11 and the mounting structure 22. In this way, the two plugging pieces 40 are respectively used for plugging the through holes 31 of the two valve seats 30, so as to realize the bidirectional throttling function of the throttling valve.
Specifically, after the fluid enters the second through hole 12, the fluid pushes the valve seat 30 located between the mounting structure 22 and the second through hole 12 to slide toward the mounting structure 22 until the valve needle 21 blocks the valve port 32, the fluid enters the flow channel 23 through the through hole 31 of the valve seat 30, the fluid discharged from the flow channel 23 pushes the valve seat 30 and the blocking piece 40 located between the mounting structure 22 and the first through hole 11 to move toward the side away from the mounting structure 22, the blocking piece 40 blocks the through hole 31 of the valve seat 30, the fluid enters the valve port 32 of the valve seat 30 and is discharged out of the valve body 10 through the valve port 32 and the first through hole 11, and the throttling purpose of throttling the fluid by the throttling valve is achieved.
Alternatively, the block piece 40 is made of rubber, or silicone, or polyvinyl chloride. Thus, the arrangement improves the sealing effectiveness of the plugging member 40 on the through hole 31 on one hand, and prevents fluid from entering the through hole 31; on the other hand, the blocking piece 40 is light, and the fluid can push the blocking piece to the position of the valve seat 30 to block the through hole 31, so that the blocking effectiveness of the blocking piece 40 is improved.
As shown in fig. 1, the blocking member 40 has a mounting through hole 41, the needle 21 is inserted into the mounting through hole 41, the mounting through hole 41 is communicated with the flow channel 23, and the mounting through hole 41 can be communicated with the valve port 32. Thus, when the plugging member 40 plugs the through hole 31 of the valve seat 30, the fluid can enter the mounting through hole 41 through the flow channel 23 and enter the valve port 32 through the mounting through hole 41, thereby achieving the throttling purpose of the throttle valve.
Alternatively, the communication passage 23 is plural, and the plural communication passages 23 are provided at intervals around the circumference of the valve needle 21. As shown in fig. 3, the number of the flow channels 23 is four, and the four flow channels 23 are spaced around the circumference of the valve needle 21 to ensure that the fluid can smoothly pass through the valve needle assembly 20 and ensure that the throttle valve can be used normally. Meanwhile, the structural strength of the valve needle assembly 20 is improved, and the service life of the valve needle assembly 20 is prolonged.
The number of the flow channels 23 is not limited to this. Optionally, the flow-through channels 23 are two, or three, or five, or six.
As shown in fig. 1, the valve body 10 has a first fastening portion 13, the mounting structure 22 has a second fastening portion 221, and the first fastening portion 13 and the second fastening portion 221 limit the stop so as to connect the mounting structure 22 and the valve body 10. Thus, the valve body 10 is clamped with the mounting structure 22, so that the valve body and the mounting structure are easier and simpler to mount and dismount, and the mounting and dismounting difficulty is reduced.
Specifically, the first clamping portion 13 is a protrusion, the second clamping portion 221 is a recess, and the protrusion extends into the recess and is limited and stopped by the recess, so as to prevent the valve body 10 and the mounting structure 22 from being displaced relatively to each other and affecting the structural stability of the throttle valve.
The structures of the first clip portion 13 and the second clip portion 221 are not limited to this. Optionally, the first clamping portion 13 is a concave portion, the second clamping portion 221 is a protrusion, and the protrusion extends into the concave portion and is limited and stopped by the concave portion, so as to prevent the valve body 10 and the mounting structure 22 from being displaced relatively to each other and affecting the structural stability of the throttle valve.
As shown in fig. 1, the two valve seats 30 include a first valve seat 33 and a second valve seat 34, the first valve seat 33 being located between the first communication port 11 and the mounting structure 22, and the second valve seat 34 being located between the second communication port 12 and the mounting structure 22. The two obturating members 40 comprise a first obturating member 42 and a second obturating member 43, the first obturating member 42 being located between the mounting structure 22 and the first valve seat 33, the second obturating member 43 being located between the second valve seat 34 and the mounting structure 22. Thus, the arrangement further ensures that the throttle valve can realize bidirectional throttling, and the throttle valve has simpler structure and is easy to process and realize,
specifically, when the fluid enters the first through-hole 11 and pushes the first valve seat 33 to slide toward the mounting structure 22 until the valve needle 21 blocks the valve port 32 of the first valve seat 33, the fluid enters the through-channel 23 through the through-hole 31 of the first valve seat 33, the fluid discharged from the through-channel 23 pushes the second valve seat 34 and the second blocking member 43 to move toward the side away from the mounting structure 22, the second blocking member 43 blocks the through-hole 31 of the second valve seat 34, the fluid enters the valve port 32 of the second valve seat 34, and the fluid is discharged out of the valve body 10 through the valve port 32 and the second through-hole 12 in sequence, thereby throttling the fluid by the throttling valve.
Specifically, after the fluid enters the second fluid opening 12, the fluid pushes the second valve seat 34 to slide toward the mounting structure 22 until the valve needle 21 blocks the valve port 32 of the second valve seat 34, the fluid enters the flow-through channel 23 through the through hole 31 of the second valve seat 34, the fluid discharged from the flow-through channel 23 pushes the first valve seat 33 and the first blocking piece 42 to move toward the side away from the mounting structure 22, the first blocking piece 42 blocks the through hole 31 of the first valve seat 33, and the fluid enters the valve port 32 of the first valve seat 33 and is discharged out of the valve body 10 through the valve port 32 and the first fluid opening 11, thereby throttling the fluid by the throttling valve.
In the present embodiment, the first valve seat 33 and the mounting structure 22 are a pair of magnetic poles that attract each other, and the second valve seat 34 and the mounting structure 22 are a pair of magnetic poles that attract each other.
As shown in fig. 1, the valve body 10 has a first throat section 14 and a second throat section 15, the first throat section 14 can be in limit stop with a first valve seat 33, and the second throat section 15 can be in limit stop with a second valve seat 34. The first constriction 14 has a first flow opening 11 and the second constriction 15 has a second flow opening 12. In this way, in the process that the first valve seat 33 and the second valve seat 34 slide in the valve body 10, the first necking section 14 can limit and stop the first valve seat 33, and the second necking section 15 can limit and stop the second valve seat 34, so that the first valve seat 33 and the second valve seat 34 are prevented from being separated from the valve body 10 to avoid influencing the structural stability of the throttle valve.
Optionally, the through hole 31 of each valve seat 30 is plural, and the plural through holes 31 are spaced around the valve port 32 of the valve seat 30. As shown in fig. 5, three through holes 31 are provided in each valve seat 30, and the three through holes 31 are spaced around the valve port 32 of the valve seat 30, and the total flow rate of the three through holes 31 is greater than the flow rate of the valve port 32. Thus, the valve seat 30 has a simple structure, is easy to process and implement, and reduces the processing cost of the valve seat 30.
The number of vias 31 is not limited to this. Optionally, each valve seat 30 has two, or four, or five, or six vias 31.
As shown in fig. 5, each valve seat 30 is further provided with a mounting hole 35, and the valve port 32 is mounted in the mounting hole 35 such that the inner diameter of the valve port 32 gradually increases in the direction from the mounting structure 22 to the first port 11 or the second port 12. Optionally, the valve port 32 snaps into engagement with the mounting hole 35. Thus, the valve port 32 and the valve seat 30 are easier and simpler to disassemble and assemble due to the arrangement, and the disassembling and assembling difficulty of the valve port and the valve seat is reduced. Meanwhile, the above-mentioned structural arrangement of the valve port 32 increases the displacement of the valve port 32 in the direction from the mounting structure 22 to the first through-hole 11 or the second through-hole 12, and prevents the normal use of the throttle valve from being affected by the blockage of fluid in the valve body 10.
From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:
after fluid enters the first circulation port, the valve seat between the mounting structure and the first circulation port is pushed to slide towards the mounting structure until the valve needle blocks the valve port, the fluid enters the circulation channel through the through hole of the valve seat, the fluid discharged from the circulation channel pushes the valve seat and the blocking piece between the mounting structure and the second circulation port to move towards one side far away from the mounting structure, the blocking piece blocks the through hole of the valve seat, the fluid enters the valve port of the valve seat and is sequentially discharged out of the valve body through the valve port and the second circulation port, and therefore the throttling purpose of throttling the fluid by the throttling valve is achieved. In this way, during the process of fluid passing through the throttling valve, the mounting structure can apply magnetic attraction force to the valve seat so as to increase the damping force applied to the valve seat and prevent the valve seat from moving towards the side far away from the mounting structure under the pushing of the fluid to influence the normal use of the throttling valve.
Compared with the throttle valve in the prior art, the throttle valve in the application has the advantages that the structure is simple, the throttle valve is easy to process and realize, the difficulty in dismounting the throttle valve is reduced, the problems that the structure of the throttle valve is complex and the dismounting is difficult in the prior art are solved, and the labor intensity of workers is reduced.
It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A throttle valve, comprising:
a valve body (10), the valve body (10) having a first communication port (11) and a second communication port (12);
a valve needle assembly (20) located in the valve body (10), the valve needle assembly (20) comprising a valve needle (21) and a mounting structure (22) fixedly connected with the valve needle (21), the valve needle (21) being connected with the valve body (10) through the mounting structure (22), the mounting structure (22) having a flow-through channel (23);
at least two valve seats (30) slidably arranged in the valve body (10), wherein at least one valve seat (30) is positioned between the mounting structure (22) and the first circulation port (11), at least one valve seat (30) is positioned between the mounting structure (22) and the second circulation port (12), each valve seat (30) is provided with a through hole (31) and a valve port (32), the valve needle (21) can extend into the valve port (32), and the flow rate of the through hole (31) is larger than that of the valve port (32);
a closure (40) located between the mounting structure (22) and the valve seat (30), the closure (40) moving towards the valve seat (30) under the urging of a fluid to close the through-hole (31);
wherein at least part of the valve seat (30) and at least part of the mounting structure (22) are made of magnetic material, and the mounting structure (22) can apply magnetic attraction force to the valve seat (30) in the process of fluid passing through the throttling valve so as to increase the damping force applied to the valve seat (30).
2. Throttle valve according to claim 1, characterized in that the second through-flow opening (12) and the first through-flow opening (11) are located on both sides of the mounting structure (22), respectively, that the blocking elements (40) are at least two, that at least one blocking element (40) is located between the second through-flow opening (12) and the mounting structure (22), and that at least one blocking element (40) is located between the first through-flow opening (11) and the mounting structure (22).
3. The throttling valve according to claim 1, characterized in that the blocking piece (40) has a mounting through hole (41), the valve needle (21) is arranged in the mounting through hole (41) in a penetrating manner, the mounting through hole (41) is communicated with the flow channel (23), and the mounting through hole (41) can be communicated with the valve port (32).
4. The throttling valve according to claim 1, characterized in that the flow-through passage (23) is plural, and the plural flow-through passages (23) are provided at intervals around the circumference of the valve needle (21).
5. The throttle valve according to claim 1, characterized in that the valve body (10) has a first snap-in portion (13), the mounting structure (22) has a second snap-in portion (221), the first snap-in portion (13) and the second snap-in portion (221) limit a stop to enable connection of the mounting structure (22) with the valve body (10).
6. The throttling valve of claim 2,
-the at least two valve seats (30) comprise a first valve seat (33) and a second valve seat (34), the first valve seat (33) being located between the first through opening (11) and the mounting structure (22), the second valve seat (34) being located between the second through opening (12) and the mounting structure (22);
the at least two closures (40) comprise a first closure (42) and a second closure (43), the first closure (42) being located between the mounting structure (22) and the first valve seat (33), the second closure (43) being located between the second valve seat (34) and the mounting structure (22).
7. The throttling valve according to claim 6, characterized in that the first valve seat (33) and the mounting structure (22) are a pair of mutually attracting magnetic poles and the second valve seat (34) and the mounting structure (22) are a pair of mutually attracting magnetic poles.
8. The throttle valve according to claim 6, characterized in that the valve body (10) has a first throat section (14) and a second throat section (15), the first throat section (14) being positive stop with the first valve seat (33) and the second throat section (15) being positive stop with the second valve seat (34); wherein the first constriction section (14) has the first flow opening (11) and the second constriction section (15) has the second flow opening (12).
9. The throttling valve according to claim 1, characterized in that the through hole (31) of each valve seat (30) is plural, and the plural through holes (31) are arranged at intervals around the valve port (32) of the valve seat (30).
10. A throttle valve according to claim 1, characterized in that each valve seat (30) is further provided with a mounting hole (35), the valve port (32) being mounted in the mounting hole (35) in the direction of the mounting structure (22) to the first through opening (11) or the second through opening (12).
CN201911192999.3A 2019-11-28 2019-11-28 Throttle valve Active CN112856007B (en)

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CN202360824U (en) * 2011-12-14 2012-08-01 天津海纳九洲掘进机制造有限公司 Novel bidirectional throttle valve

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CN202141259U (en) * 2011-06-23 2012-02-08 浙江同星制冷有限公司 A bidirectional throttle valve for an air-conditioning system
CN104422211B (en) * 2013-09-05 2016-08-24 珠海格力电器股份有限公司 Air-conditioner and short-tube throttle valve thereof
CN204512601U (en) * 2015-02-09 2015-07-29 宁波埃美柯铜阀门有限公司 Magnetic switch integral valve
CN108613443A (en) * 2018-06-21 2018-10-02 吴军 A kind of one-way throttle valve and its bidirectional throttling valve
CN209279452U (en) * 2018-08-13 2019-08-20 新昌县华亿机械有限公司 A kind of back-to-back type throttle valve
CN209181325U (en) * 2018-09-10 2019-07-30 浙江盾安禾田金属有限公司 Bidirectional expansion valve

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Publication number Priority date Publication date Assignee Title
WO2004027534A1 (en) * 2002-09-06 2004-04-01 Robert Bosch Gmbh Volumetric flow regulation valve
CN202360824U (en) * 2011-12-14 2012-08-01 天津海纳九洲掘进机制造有限公司 Novel bidirectional throttle valve

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