WO2020215705A1 - 先导阀、先导阀安装组件及换向阀组 - Google Patents

先导阀、先导阀安装组件及换向阀组 Download PDF

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Publication number
WO2020215705A1
WO2020215705A1 PCT/CN2019/119007 CN2019119007W WO2020215705A1 WO 2020215705 A1 WO2020215705 A1 WO 2020215705A1 CN 2019119007 W CN2019119007 W CN 2019119007W WO 2020215705 A1 WO2020215705 A1 WO 2020215705A1
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WO
WIPO (PCT)
Prior art keywords
pilot valve
assembly
bracket
connecting portion
valve seat
Prior art date
Application number
PCT/CN2019/119007
Other languages
English (en)
French (fr)
Inventor
陈建军
孙俊杰
刘海波
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 CN201920580853.5U external-priority patent/CN209925678U/zh
Priority claimed from CN201920621120.1U external-priority patent/CN210218863U/zh
Priority claimed from CN201920621137.7U external-priority patent/CN210318631U/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
Priority to KR1020217036355A priority Critical patent/KR102409921B1/ko
Priority to JP2021556298A priority patent/JP7332710B2/ja
Publication of WO2020215705A1 publication Critical patent/WO2020215705A1/zh

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Classifications

    • 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
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • 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
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid

Definitions

  • This application relates to the technical field of fluid control, and in particular to a pilot valve, a pilot valve installation assembly and a reversing valve group.
  • the reversing valve group is an important component in the refrigeration system.
  • the reversing valve in the reversing valve group usually needs to be controlled by the pilot valve to realize heating and cooling of the refrigeration system through its own reversing effect on the medium flow path. Switching of functions.
  • the current reversing valve group cannot meet all the requirements of the refrigeration system in many performances. For example, the production cost of the pilot valve in the reversing valve group is still relatively high, and the service life is relatively short.
  • pilot valve has a reduced production cost, prolonged service life, and has a wide range of application prospects.
  • This application provides a pilot valve, including:
  • a pilot valve seat, the pilot valve seat is contained in the conduit;
  • a core iron assembly the core iron assembly is housed in the conduit and located on one side of the pilot valve seat;
  • bracket assembly the bracket assembly is fixedly connected to the core iron assembly and slidably connected to the pilot valve seat, the bracket assembly can follow the core iron assembly to slide back and forth in the catheter;
  • the pilot valve further includes a collar, the collar is accommodated in the conduit between the pilot valve seat and the core iron assembly, the pilot valve seat resists the collar and passes through the The collar locates the core iron assembly.
  • the end surface of the pilot valve seat facing the core iron assembly is divided from top to bottom into an upper half area and a lower half area, and the upper half area extends toward the core iron assembly to form the lower half area. Dislocation, a positioning step is formed between the upper half area and the lower half area after the displacement; the pilot valve seat is clamped with the collar through the positioning step.
  • the collar includes a first connecting portion and a second connecting portion connected to the first connecting portion, the first connecting portion is provided with a ring opening; the positioning step resists the ring opening The inner wall.
  • the end surface of the pilot valve seat facing the core iron component is flat, and the pilot valve seat abuts the collar through the end surface facing the core iron component.
  • the collar includes a first connecting portion, a second connecting portion, and a third connecting portion, the second connecting portion is connected between the first connecting portion and the third connecting portion, and the first connecting portion Portion, the second connecting portion, and the third connecting portion form a receiving area that cooperates with the pilot valve seat; one end of the pilot valve seat abuts the first connecting portion, and the other end abuts the third connecting portion .
  • first connecting portion and the third connecting portion are symmetrically distributed with respect to the second connecting portion.
  • the bracket assembly includes a bracket, a slider and a reed, the bracket is connected to the core assembly, the slider is disposed on the bracket, and the reed includes a mounting portion and An abutment part, the mounting part is connected to the bracket, the abutment part abuts the slider; the abutment part is provided with a blocking piece opposite to the other side of the sliding block, the blocking piece It is bent or bent and extends along the edge of the abutting part.
  • a connecting portion for connecting the mounting portion and the abutting portion is further provided on the reed, and the connecting portion is obliquely connected between the abutting portion and the mounting portion.
  • baffle piece is vertically arranged with respect to the plane where the abutting portion is located.
  • baffle piece and the abutting portion are integrally formed; or,
  • the blocking piece and the abutting portion are separately provided.
  • a side surface of the abutting portion is provided with a pressing portion extending toward the sliding block and used for pressing the sliding block.
  • the present application also provides a pilot valve installation assembly, including a first bracket, a second bracket, and the pilot valve as described in any one of the above;
  • One side of the first bracket is provided with at least one first fixing portion welded and fixed to the pilot valve, and the other side of the first bracket with respect to the first fixing portion is provided with a first welding surface, so A positioning boss is provided on the first welding surface;
  • One side of the second bracket is provided with at least one second fixing portion welded and fixed to the reversing valve, and the other side of the second bracket with respect to the second fixing portion is provided with a second welding surface, A positioning hole for the positioning boss to pass is provided on the second welding surface;
  • the positioning boss is embedded in the positioning hole, and the first welding surface is welded and fixed on the second welding surface.
  • the positioning boss has a waist shape
  • the positioning hole is a waist hole corresponding to the positioning boss.
  • first fixing portion welds and fixes one side surface of the pilot valve as a first connecting surface
  • first connecting surface is arc-shaped and fits with the outer surface of the pipe wall of the pilot valve
  • the side surface of the second fixing portion welded to fix the reversing valve is defined as a second connecting surface, and the second connecting surface is arc-shaped and fits with the outer surface of the pipe wall of the reversing valve.
  • the number of the first fixing parts is more than three, and the three or more first fixing parts are formed into two groups and are respectively located on opposite sides of the positioning boss; or,
  • the number of the second fixing parts is more than three, and the three or more second fixing parts are arranged in two groups on opposite sides of the positioning hole.
  • the first bracket includes at least one first bottom plate and at least two first connecting plates; the positioning boss is fixed on one side of the first bottom plate, and the first bottom plate is opposite to the positioning protrusion.
  • the other side of the table is fixedly connected to the two first connecting plates, and the two first connecting plates are respectively fixed to the two first fixing parts.
  • the second bracket includes at least one second bottom plate and at least two second connecting plates; the positioning hole is opened on the second bottom plate, and the two second connections are fixed on the second bottom plate.
  • the two second connecting plates are respectively fixedly connected to the two second fixing parts.
  • the present application also provides a reversing valve group, including a reversing valve and a pilot valve mounting assembly connected to the reversing valve, and the pilot valve mounting assembly is the pilot valve mounting assembly described in any one of the above.
  • the inner wall of the ring opening in the collar is used to guide the positioning of the core iron assembly, which improves the positioning of the core iron assembly during assembly. Accuracy. At the same time, it can avoid direct contact between the core iron component and the pilot valve seat in the long-term working process, and play a certain buffering effect, ensuring the stability of the core iron component positioning and prolonging the service life.
  • Fig. 1 is a schematic cross-sectional view of the pilot valve in the first embodiment of the application.
  • Fig. 2 is a schematic diagram of the three-dimensional structure of the pilot valve seat shown in Fig. 1.
  • Fig. 3 is a schematic structural diagram of a collar in the pilot valve shown in Fig. 1.
  • FIG. 4 is a schematic diagram of the structure of the pilot valve in the second embodiment of the application.
  • Fig. 5 is a schematic diagram of the three-dimensional structure of the collar in the pilot valve shown in Fig. 4.
  • Fig. 6 is a schematic structural diagram of a pilot valve in a third embodiment of the application.
  • FIG. 7 is a schematic diagram of the three-dimensional structure of the reed in the pilot valve shown in FIG. 6.
  • FIG. 8 is a schematic diagram of the three-dimensional structure of the reed shown in FIG. 6 from another viewing angle.
  • FIG. 9 is a schematic diagram of the three-dimensional structure of the reed used in the pilot valve in the fourth embodiment of this application.
  • FIG. 10 is a schematic diagram of the structure of the reversing valve group provided by this application.
  • Fig. 11 is a structural diagram of the first bracket in the reversing valve group shown in Fig. 10.
  • Fig. 12 is a structural schematic diagram of the second bracket in the reversing valve group shown in Fig. 10.
  • FIG. 13 is a schematic diagram of the structure of the reversing valve group in the fifth embodiment of this application.
  • FIG. 14 is a schematic diagram of the structure of the reversing valve group in the sixth embodiment of this application.
  • a component when referred to as being “installed on” another component, it can be directly installed on another component or a central component may also exist. When a component is considered to be “installed on” another component, it can be directly installed on another component or a centered component may exist at the same time. When a component is considered to be “fixed” to another component, it can be directly fixed to the other component or there may be a centered component at the same time.
  • the present application provides a pilot valve 100, which is used to drive an external control valve to open and close.
  • the pilot valve 100 is applied in a refrigeration system, and the external control valve at this time is a reversing valve in the refrigeration system; the pilot valve 100 drives the reversing valve to change by piloting the reversing valve in the refrigeration system. Its own operating status and switch the flow of refrigerant in the refrigeration system.
  • pilot valve 100 may also be applied to a pipeline system other than a refrigeration system, as long as the pipeline system can apply the pilot valve 100 provided in the present application.
  • the pilot valve 100 includes a catheter 10, a pilot valve seat 20, a core iron assembly 30, a collar 40, a bracket assembly 50 and a capillary assembly 60.
  • the pilot valve seat 20, the core iron assembly 30, the collar 40, and the bracket assembly 50 are all arranged inside the catheter 10.
  • the pilot valve seat 20 and the core iron assembly 30 are arranged opposite to and fixedly connected to the catheter 10 and the capillary assembly 60.
  • the collar 40 is arranged between the pilot valve seat 20 and the core iron assembly 30, the bracket assembly 50 is fixedly connected to the core iron assembly 30, and the capillary assembly 60 is fixedly connected to the conduit 10 and communicates with the external reversing valve.
  • the catheter 10 is used to house the pilot valve seat 20, the core iron assembly 30, the collar 40, and the bracket assembly 50; the pilot valve seat 20 is used to fix the capillary assembly 60 and carry part of the bracket assembly 50; the core iron assembly 30 is used The bracket assembly 50 is driven to slide back and forth; the collar 40 is used to position the core iron assembly 30 and avoid direct collision between the core iron assembly 30 and the pilot valve seat 20; the bracket assembly 50 is used to control and adjust the fluid in the capillary assembly 60 The operating status of the media.
  • the pipe 10 is a pipe body with a circular cross section, and the inside of the pipe 10 is hollow and cylindrical, and the pipe 10 is made of stainless steel.
  • the cross section of the conduit 10 can also adopt a square shape other than a circular ring shape, and the material of the conduit 10 can also be made of brass and other materials other than stainless steel, as long as the The shape and material of the catheter 10 do not affect the realization of the basic functions of the pilot valve 100.
  • FIG. 2 is a three-dimensional structural diagram of the pilot valve seat 20 shown in FIG. 1.
  • the pilot valve seat 20 abuts against the inner wall of the catheter 10 and is fixedly connected to the capillary assembly 60.
  • the pilot valve seat 20 is provided with a plurality of pilot valve ports 21, and the pilot valve ports 21 communicate with the capillary tube in the capillary assembly 60; when the bracket assembly 50 continuously slides on the surface of the pilot valve seat 20, the bracket assembly 50 can make Different pilot valve ports 21 realize communication, so as to realize the communication of different capillaries in the capillary assembly 60, and further realize the control function of the fluid medium in the capillary assembly 60.
  • the number of pilot valve ports 21 is three, and the three pilot valve ports 21 are arranged at intervals. It can be understood that in other embodiments, the number of pilot valve ports 21 can be adjusted to more than three according to the operating conditions.
  • the cross section of the pilot valve seat 20 is generally semicircular, and the longitudinal section is generally rectangular.
  • the pilot valve seat 20 is also made of stainless steel.
  • the pilot valve seat 20 may also be made of brass or other materials other than stainless steel.
  • the end surface of the pilot valve seat 20 relatively close to the core iron assembly 30 is divided from top to bottom into an upper half area 23 and a lower half area 24.
  • the upper half area 23 extends toward the core iron assembly 30 and forms with the lower half area 24 Dislocation, a positioning step 22 is formed between the upper half area 23 and the lower half area 24 after the displacement.
  • the positioning step 22 on the pilot valve seat 20 provided in this embodiment is formed by displacing the upper half area 23 and the lower half area 24 of the pilot valve seat 20, and is directly protruding from the positioning step 22 on the inner wall of the catheter 10 or the valve body ( In the traditional structure, compared with the solution on the inner wall of the pipe 10 separately arranged and used to carry the parts of the capillary assembly 50), the difficulty of processing the valve body itself is effectively reduced; and the processing of the positioning step 22 can directly rely on the pilot
  • the valve seat 20 can be processed by, for example, stamping and forming, which is not only convenient and convenient, but also can improve processing efficiency.
  • the core iron assembly 30 includes a core iron 31, an attractor 32, and an elastic element 33.
  • the core iron 31 abuts against the inner wall of the catheter 10 and is connected to the bracket assembly 50.
  • One end of the elastic element 33 resists the attractor 32, and the other end resists ⁇ 31.
  • the attractor 32 When the attractor 32 is energized, the attractor 32 can attract the core iron 31 through its own magnetic force to overcome the resistance of the elastic element 33 and move toward the attractor 32; at this time, the core iron 31 simultaneously drives the bracket assembly 50 toward the attractor 32 The movement is represented by the carriage assembly 50 sliding on the pilot valve seat 20 toward the attractor 32.
  • the rebound of the elastic element 33 after being compressed can drive the core 31 to move away from the attractor 32; at this time, the core 31 simultaneously drives the bracket assembly 50 to move away from the attractor.
  • the movement in the direction of 32 is represented by the carriage assembly 50 sliding on the pilot valve seat 20 in a direction away from the attractor 32.
  • the elastic element 33 is a spring. It can be understood that in other embodiments, the elastic element 33 may also be an elastic ball or other elements other than a spring.
  • FIG. 3 is a structural diagram of the collar 40 in the pilot valve 100 shown in FIG. 1.
  • the collar 40 is accommodated in a portion of the catheter 10 between the pilot valve seat 20 and the core iron assembly 30.
  • the collar 40 includes a first connecting portion 41 and a second connecting portion 42 connected to each other.
  • the first connecting portion 41 is a ring body whose main body is a circular cross-section.
  • the first connecting portion 41 and the inner wall of the catheter 10 can be fixed to each other by welding or the like.
  • a hollow ring is provided in the middle of the first connecting portion 41.
  • the opening 411, and the first connecting portion 41 is equally divided into an upper ring area and a lower ring area along the horizontal direction.
  • the lower ring area of the first connecting portion 41 is clamped and fixed to the outer edge of the positioning step 22, and the upper half area 23 of the pilot valve seat 20 after being displaced is inserted into the ring opening 411 of the ring body, similar to For the structure of the snap ring and the ring block.
  • the first connecting portion 41 has a circular ring shape in this embodiment. It can be understood that, as long as the assembly between the first connecting portion 41 and the pilot valve seat 20 and the positioning step 22 is not affected, the first connecting portion 41 may also have other shapes such as a square ring.
  • the second connecting portion 42 is a cylindrical body whose main body is semi-cylindrical.
  • the second connecting portion 42 is arranged directly on the top of the pilot valve seat 20 and can be fixed on the pipe wall of the catheter 10 by welding or the like, thereby improving the overall stability.
  • the second connecting portion 42 is fixed on the upper ring area of the first connecting portion 41 and is located on a side relatively far away from the core iron assembly 30.
  • connection between the first connecting portion 41 and the second connecting portion 42 in this embodiment may be integral stamping forming, or split welding fixing, as long as it does not affect the assembly between the collar 40 and the positioning step 22 , Or other connection methods.
  • the pilot valve seat 20 with the positioning step 22 can be installed in the catheter 10 first, and then the collar 40 and the positioning step 22 can be assembled; and then the lower ring area of the first connecting portion 41 is close to the outside of the positioning step 22 Then, the upper half area 23 of the pilot valve seat 20 is inserted into the ring opening 411 of the first connecting portion 41 to complete the clamping and fixing of the first connecting portion 41 and the positioning step 22, and then the collar 40 and the catheter 10 They are fixed together by welding, etc., and then the other components are assembled.
  • the bracket assembly 50 is fixed on the core iron assembly 30 and extends substantially along the axial direction of the catheter 10 to the pilot valve seat 20.
  • the bracket assembly 50 includes a bracket 51, a reed 52, a slider 53 and a fixing base 54.
  • One end of the bracket 51 is fixedly connected to the core 31, and the sliding block 53 and the fixing base 54 are both sleeved and fixedly connected to the bracket 51
  • One end of the reed 52 is sandwiched between the bracket 51 and the fixing seat 54, and the other end is pressed against the surface of the slider 53 under the pressure of the fixing seat 54, thereby pressing the slider 53 against the pilot valve Seat 20 on the surface.
  • the reciprocating sliding of the core iron 31 in the duct 10 will drive the slider 53 to slide on the pilot valve seat 20 through the bracket 51; when the slider 53 slides on the pilot valve seat 20, the through hole opened on the slider 53 will be Different capillaries in the capillary assembly 60 are connected.
  • the slider 53 is a sliding bowl with an opening facing downward. It can be understood that in other embodiments, the slider 53 can also adopt other structures than those shown, as long as the slider 53 can realize the communication between different capillaries.
  • the capillary assembly 60 includes four capillaries, namely an E capillary 61, an S capillary 62, a C capillary 63, and a D capillary 64.
  • the pilot valve seat 20 is provided with an E capillary interface, an S capillary interface, and a C capillary interface corresponding to the E capillary 61, the S capillary 62, and the C capillary 63 respectively.
  • the D capillary 64 is inserted into the end of the duct 10 away from the core iron assembly 30 and communicates with the inside of the duct 10 so that the D capillary 64 is more adapted to the tube shape of the duct 10.
  • the elastic element 33 When the pilot valve 100 is de-energized in the attractor 32, the elastic element 33 will push the core iron 31 to slide toward the positioning step 22 and make contact with the collar 40. At this time, the first connecting portion 41 in the collar 40 faces the core The iron 31 has a certain buffering effect and prevents the core iron 31 from directly contacting the positioning step 22 and causing damage. At the same time, the core iron 31 pushes the bracket 51 and the slider 53 to slide toward the positioning step 22 so that the E capillary 61 and the S capillary 62 are in communication, and the C capillary 63 and the D capillary 64 are in communication.
  • the attractor 32 attracts the core iron 31 to slide in a direction away from the positioning step 22 to separate the first connecting portion 41 of the collar 40 from the core iron 31, and the core iron 31 drives the bracket 51 and the slider 53 slide in a direction away from the positioning step 22 so that the S capillary 62 and the C capillary 63 are in communication, and the E capillary 61 and the D capillary 64 are in communication.
  • pilot valve 100 provided in the first embodiment of the present application, by accommodating the pilot valve seat 20 and the core iron assembly 30 in the same conduit 10, the volume of the entire equipment is reduced, the processing difficulty and the production cost are reduced. At the same time, the problem of poor sealing performance between the valve body and the conduit in the traditional pilot valve is avoided.
  • the positioning step 22 is arranged on the pilot valve seat 20, which effectively reduces the processing difficulty.
  • the inner wall of the ring opening 411 in the collar 40 is used to guide the positioning of the core iron assembly 30, which improves the assembly time of the core iron assembly 30.
  • the accuracy of positioning At the same time, it can avoid direct contact between the core iron assembly 30 and the pilot valve seat 20 during the long-term working process, and play a certain buffering effect to ensure the stability of the core iron assembly 30 positioning and prolong the service life.
  • FIG. 4 is a schematic diagram of the structure of the pilot valve 100 in the second embodiment of this application
  • FIG. 5 is a schematic diagram of the three-dimensional structure of the collar 40a of the pilot valve 100 shown in FIG. 4.
  • the pilot valve seat 20a in the second embodiment of the present application extends synchronously in the upper half area 23 and the lower half area 24 facing the end face of the core iron assembly 30, and the upper half area 23 and the lower half area 24 of the pilot valve seat 20a
  • the extension length is the same. That is to say, there is no positioning step 22 in the pilot valve seat 20a, and the end surface of the pilot valve seat 20a facing the core iron assembly 30 is flat. At this time, the pilot valve seat 20a passes through the upper half area 23 and the lower half area 24 (that is, facing the core iron assembly The end face of 30) simultaneously abuts the collar 40a.
  • a third connecting portion 43 is added to the collar 40a.
  • the third connecting portion 43 is a ring body with a circular cross section and substantially matching the first connecting portion 41a.
  • the third connecting portion 43 is fixed on the side of the second connecting portion 42a away from the first connecting portion 41a.
  • the third connecting portion 43 has a circular ring shape or a square ring shape. As long as the third connecting portion 43 does not affect the assembly between itself and the pilot valve seat 20a, it may also have other shapes. Preferably, the shape and size of the third connecting portion 43 and the first connecting portion 41a are consistent.
  • the first connecting portion 41a, the second connecting portion 42a, and the third connecting portion 43 are connected to each other and form a receiving area 44 that cooperates with the pilot valve seat 20a.
  • the collar 40a has a bilateral symmetric structure as a whole, and the stability is higher.
  • the receiving area 44 formed by the connection of the first connecting portion 41a, the second connecting portion 42a and the third connecting portion 43 can better cooperate with the pilot valve seat 20a in the second embodiment of the present application, avoiding the pilot valve seat 20a and Relative slip occurs between the collars 40a.
  • connection between the first connecting portion 41a, the second connecting portion 42a and the third connecting portion 43 in this embodiment may be integral stamping forming or separate welding fixing, as long as it does not affect the collar 40a and the pilot valve
  • the assembly between the seats 20a may also be other connection methods.
  • the core iron assembly 30 is positioned by the resistance of the pilot valve seat 20a on the collar 40a and the resistance of the collar 40a to the core iron assembly 30, using the collar 40a
  • the positioning function also avoids the need to protrude convex bosses on the inner wall of the valve body or the conduit 10, which effectively reduces the difficulty of processing the pilot valve 100.
  • the symmetrical structure of the collar 40a further improves the connection stability of the pilot valve seat 20a in the collar 40a and prolongs the service life.
  • FIG. 6 is a schematic structural diagram of the pilot valve 100 in the third embodiment of this application.
  • FIG. 7 is a three-dimensional structural schematic diagram of the reed 52 in the pilot valve 100 shown in FIG. 6 and
  • FIG. 8 is The three-dimensional structure diagram of the reed 52 shown in FIG. 6 from another perspective.
  • the reed 52 used in the third embodiment of the present application is only used in the pilot valve 100 shown in FIG. 6 of the present application, it can be understood that the reed 52 provided in the third embodiment of the present application also The same can be applied to the first embodiment ( Figure 1) and the second embodiment ( Figure 4) of this application.
  • the reed 52 includes a mounting portion 521 and an abutting portion 522.
  • the mounting portion 521 is connected to the carriage 51.
  • One side of the abutting portion 522 is in contact with the top of the slider 53 and presses the slider 53.
  • the reed 52 has certain elasticity. , And used to prevent the slider 53 from sliding away from the mounting hole along the axial direction of the mounting hole to ensure that the pilot valve 100 can work normally.
  • the material of the reed 52 is generally made of a metal with good elastic properties, and a thin-walled reed 52 is formed by simple punching and bending, which can satisfy the requirement that the reed 52 press against the slider. , To prevent the slider from detaching from the drag frame, save costs and improve economic benefits.
  • a baffle 523 is also provided on the side of the abutment portion 522 facing away from the slider 53.
  • the blocking piece 523 When the force of the reed 52 against or colliding with the inner wall of the catheter 10 is large, the blocking piece 523 may be deformed, so that the reed 52 loses the purpose of restricting the sliding block 53 from separating from the carriage 51. Therefore, the baffle 523 is bent or extended along the edge of the abutting portion 522. In this way, since the baffle 523 is a curved or bent extension structure, the structural rigidity of the baffle 523 is increased compared to a straight thin-walled structure. When the sheet 523 collides with the inner wall of the catheter 10, the deformation of the blocking sheet 523 can be effectively reduced.
  • the side of the abutting portion 522 has arc-shaped segments, and the blocking piece 523 is bent and extended along the edge of the abutting portion 522, thereby forming a semi-enclosing structure relative to the abutting portion 522, thereby enhancing the strength of the blocking piece 523.
  • the reed 52 it is beneficial for the reed 52 to better press against the slider 53, thereby ensuring that the pilot valve 100 is normal jobs.
  • the blocking piece 523 is curved and extended along the three adjacent sides of the abutting portion 522, thereby forming a blocking piece 523 with a semi-enclosed structure.
  • the blocking piece 523 may also be along the abutting portion 522.
  • 522 is a semi-enclosing structure formed by bending and extending two adjacent sides, or a full-enclosing structure formed relative to the abutting portion 522, which is not specifically limited, as long as the baffle 523 is provided by bending and extending to strengthen the baffle 523 The rigidity against impact deformation can ensure that the baffle 523 will not bend when colliding with the inner wall of the duct 10.
  • the reed 52 further includes a connecting portion 524, which is provided between the mounting portion 521 and the abutting portion 522, one end of the connecting portion 524 is connected to the mounting portion 521, and the other end of the connecting portion 524 is connected to the abutting portion 522 is connected, and the connecting portion 524 is obliquely connected between the mounting portion 521 and the abutting portion 522, so that the horizontal position of the abutting portion 522 is higher than the horizontal position of the mounting portion 521.
  • This arrangement facilitates the abutment portion 522 to cooperate with the pressing slider 53.
  • the reed 52 has certain elasticity, when the force of the medium acting on the slider 53 is greater than the force of the abutment portion 522 on the slider 53, the reed 52 will be elastically deformed, and the inclined connecting portion 524 will As a deformed part, the degree of inclination increases under the action of force.
  • the deformed connecting portion 524 will return to its original shape, so that the abutting portion 522 is always pressed
  • the sliding block 53 can reliably prevent the sliding block 53 from being separated from the carriage 51.
  • the blocking piece 523 provided on the abutting portion 522 is substantially perpendicular to the plane where the abutting portion 522 is located.
  • the abutting portion 522 is moved upwards due to the impact of the slider 53 promote.
  • the blocking piece 523 abuts against the inner wall of the catheter 10 because the blocking piece 523 is substantially perpendicular to the plane where the abutting portion 522 is located. Therefore, when the inner wall of the catheter 10 applies force to the baffle 523, the baffle 523 is not prone to bend at other angles, which is beneficial to the normal operation of the pilot valve 100.
  • the blocking piece 523 is an integrally formed structure formed by flanging the abutting portion 522, so as to facilitate the processing of the blocking piece 523 and facilitate mass production.
  • the blocking piece 523 and the abutting portion 522 may also have a separate structure, and the blocking piece 523 may be fixed to the abutting portion 522 by adhesive connection or welding, which is not specifically limited.
  • the reed 52 is further provided with a pressing portion 525 on the side where the abutting portion 522 presses the slider 53.
  • the abutting portion 522 presses the slider 53 through the pressing portion 525, which is beneficial for the abutting portion 522 to better align
  • the sliding block 53 applies force to further prevent the sliding block 53 from separating from the carriage 51.
  • FIG. 9 is a schematic diagram of the three-dimensional structure of the reed 52 a used in the pilot valve 100 in the fourth embodiment of this application.
  • the difference between the structure of the reed 52a in the fourth embodiment of the present application and the reed 52 in the third embodiment of the present application is that the sides of the abutting portion 522a are all straight segments, and the blocking piece 523a abuts along The edges of the portion 522a are bent and extended, which can also enhance the strength of the blocking piece 523a and prevent the blocking piece 523a from bending.
  • the blocking piece 523a is bent and extended along the three adjacent sides of the abutting portion 522a, which is also not specifically limited. In other embodiments, as described above, the blocking piece 523a may be opposite to the abutting portion 522a.
  • FIG. 10 is a schematic diagram of the structure of the reversing valve group 200 provided by this application.
  • FIG. 11 is a schematic view of the structure of the first bracket 300 in the reversing valve group 200 shown in FIG. 10, and
  • FIG. 12 is FIG. 10 shows a schematic structural diagram of the second bracket 400 in the reversing valve group 200.
  • the reversing valve group 200 includes a reversing valve 201 and a pilot valve mounting assembly 202 installed on the reversing valve 201.
  • the pilot valve mounting assembly 202 includes the above-mentioned pilot valve 100, the first bracket 300, and the second bracket 400.
  • the pilot valve 100 is installed on the reversing valve 201 through the first bracket 300 and the second bracket 400.
  • the reversing valve 201 and the pilot valve 100 are no longer the traditional mechanical riveting structure.
  • the reversing valve 201 is embedded between the first bracket 300 and the second bracket 400.
  • the fixed connection with the pilot valve 100 can be realized by fitting, which can overcome the technical defects of the traditional reversing valve group 200 that are difficult to assemble, easy to rivet, and low resonance frequency.
  • One side of the first bracket 300 is provided with at least one first fixing portion 301 for welding the pilot valve 100, and the other side of the first bracket 300 with respect to the first fixing portion 301 is provided with a first welding surface 304, and the first welding A positioning boss 303 is provided on the surface 304.
  • One side of the second bracket 400 is provided with at least one second fixing portion 401 for welding the reversing valve 201, the second bracket 400 is provided with a second welding surface 404 on the other side of the second fixing portion 401, and The welding surface 404 has a positioning hole 403 for the positioning boss 303 to pass through.
  • the positioning boss 303 is embedded in the positioning hole 403, and the first welding surface 304 is welded and fixed on the second welding surface 404.
  • the first welding surface 304 and the second welding surface 404 may be connected and fixed by laser welding; the positioning boss 303 may have a waist shape, and the positioning hole 403 may also be a waist hole correspondingly.
  • the pilot valve installation assembly 202 provided by the present application is designed to support the pilot valve 100 and the reversing valve 201 separately, and then welded to the corresponding brackets to achieve a mechanical riveting-free structure between the pilot valve 100 and the reversing valve 201 Indirect fixation can overcome the technical defects of traditional structure that are difficult to assemble, easy to riveting, and low resonance frequency.
  • one side surface of the first fixing portion 301 welded and fixed to the pilot valve 100 is defined as the first connecting surface 302, the first connecting surface 302 It is curved to fit the outer surface of the pipe wall of the pilot valve 100.
  • the second fixing portion 401 welds and fixes the reversing valve 201 on one side surface defined as the second connecting surface 402.
  • the surface 402 is arc-shaped to fit the outer surface of the pipe wall of the reversing valve 201.
  • the number of the first fixing portion 301 is two, and the two first fixing portions 301 are located on opposite sides of the positioning boss 303; the number of the second fixing portion 401 is also two, and the two The two fixing portions 401 are respectively located on opposite sides of the positioning hole 403.
  • the number of the first fixing portion 301 may be one or more, and the number of the second fixing portion 401 may also be one or more.
  • the first bracket 300 may include a first bottom plate 305, two first connecting plates 306, two first fixing portions 301 and the positioning boss 303.
  • the positioning boss 303 is fixed on one side of the first bottom plate 305, and two first connecting plates 306 are fixed on the opposite side of the first bottom plate 305.
  • the two first connecting plates 306 can be oppositely disposed on the first bottom plate 305 and fix the two first fixing portions 301 respectively.
  • the second bracket 400 may include a second bottom plate 405, two second connecting plates 406, two second fixing parts 401 and the positioning holes 403.
  • the positioning hole 403 is opened on the second bottom plate 405, and two second connecting plates 406 are fixed on the second bottom plate 405.
  • the two second connecting plates 406 can be oppositely disposed on the second bottom plate 405 and fix the two second fixing parts 401 respectively.
  • both brackets can adopt an integrated structure.
  • the first bracket 300 and the pilot valve 100 are welded and fixed to each other by means of laser welding, brazing in a furnace, etc.;
  • the second bracket 400 and the reversing valve 201 are welded and fixed to each other by means of laser welding, brazing in a furnace, etc.;
  • first welding surface 304 of the first bracket 300 and the second welding surface 404 of the second bracket 400 are connected by laser welding or the like.
  • FIG. 13 is a schematic structural diagram of the reversing valve group 200 in the fifth embodiment of this application.
  • the number of the first fixing portion 301a of the first bracket 300 in the reversing valve group 200 is one, and the first fixing portion 301a is equivalent to the two first fixing portions 301 in FIG. Form one.
  • the first fixing portion 301a can be welded to the pilot valve 100 with a larger area.
  • the number of the second fixing portion 401a in the second bracket 400 is one, and the second fixing portion 401a is equivalent to the two second fixing portions 401 in FIG. At this time, the second fixing portion 401a can be welded to the pilot valve 100 with a larger area.
  • FIG. 14 is a schematic structural diagram of the directional valve group 200 in the sixth embodiment of this application.
  • the number of the first fixing portions 301b of the first bracket 300 in the reversing valve group 200 is three, and the three first fixing portions 301b are divided into two groups and located on opposite sides of the positioning boss 303;
  • the number of the second fixing portion 401b is also multiple, and the multiple second fixing portions 401b are divided into two groups and located on opposite sides of the positioning hole 403, respectively.
  • the pilot valve mounting assembly 202 and the reversing valve group 200 provided with the pilot valve mounting assembly 202 can realize a stable connection between the reversing valve 201 and the pilot valve 100, and can overcome the difficulty of assembly and easy riveting in the traditional structure.
  • the technical defects of deviation and low resonance frequency have broad application prospects.

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  • Magnetically Actuated Valves (AREA)
  • Valve Housings (AREA)

Abstract

一种先导阀、先导阀安装组件以及换向阀组被公开。先导阀（100）包括：导管（10）；先导阀座（20，20a），先导阀座（20，20a）收容于导管（10）内；芯铁组件（30），芯铁组件（30）收容于导管（10）内并位于先导阀座（20，20a）的一侧；托架组件（50），托架组件（50）固定连接于芯铁组件（30）并滑动连接于先导阀座（20，20a），托架组件（50）能够跟随芯铁组件（30）在导管（10）内往复滑动；先导阀（100）还包括套环（40，40a），套环（40，40a）容置于位于先导阀座（20，20a）与芯铁组件（30）之间的导管（10）内，先导阀座（20，20a）抵持套环（40，40a）并通过套环（40，40a）定位芯铁组件（30）。该先导阀通过在芯铁组件（30）与先导阀座（20，20a）之间增设套环（40，40a），能够避免芯铁组件（30）与先导阀座（20，20a）之间发生直接触碰，延长了使用寿命。

Description

先导阀、先导阀安装组件及换向阀组
相关申请
本申请要求2019年4月25日申请的，申请号为201920621120.1，名称为“一种先导阀芯铁定位结构及电磁四通换向阀”、2019年4月30日申请的，申请号为201920621137.7，名称为“一种先导阀和主阀固定结构及电磁四通换向阀”、2019年4月25日申请的，申请号为201920580853.5，名称为“四通阀的导阀”的中国专利申请的优先权，在此将其全文引入作为参考。
技术领域
本申请涉及流体控制技术领域，尤其涉及一种先导阀、先导阀安装组件及换向阀组。
背景技术
换向阀组是制冷系统中的重要部件，换向阀组中的换向阀通常需要在先导阀的辅助控制作用下，通过自身对介质流道的换向作用实现对制冷系统制热与制冷功能的切换。但是目前的换向阀组在诸多性能上并不能满足制冷系统的全部需求。例如换向阀组中的先导阀的生产成本仍然相对高昂，寿命上也相对较短。
发明内容
有鉴于此，有必要提供一种改进的先导阀、先导阀安装组件及换向阀组，该先导阀的生产成本降低，寿命延长，具有广泛的应用前景。
本申请提供一种先导阀，包括：
导管；
先导阀座，所述先导阀座收容于所述导管内；
芯铁组件，所述芯铁组件收容于所述导管内并位于所述先导阀座的一侧；
托架组件，所述托架组件固定连接于芯铁组件并滑动连接于先导阀座，托架组件能够跟随芯铁组件在导管内往复滑动；
所述先导阀还包括套环，所述套环容置于位于所述先导阀座与所述芯铁组件之间的所述导管内，所述先导阀座抵持所述套环并通过所述套环定位所述芯铁组件。
进一步地，所述先导阀座面向所述芯铁组件的端面自上而下分为上半区域和下半区域，所述上半区域朝向所述芯铁组件延伸以与所述下半区域形成错位，错位后的所述上半区域与所述下半区域之间形成定位台阶；所述先导阀座通过所述定位台阶卡接所述套环。
进一步地，所述套环包括第一连接部以及连接于所述第一连接部的第二连接部，所述第一连接部上开设有环口；所述定位台阶抵持于所述环口的内壁。
进一步地，所述先导阀座面向所述芯铁组件的端面为平面，所述先导阀座通过面向所述芯铁组件的端面抵持所述套环。
进一步地，套环包括第一连接部、第二连接部以及第三连接部，所述第二连接部连接于所述第一连接部与所述第三连接部之间，所述第一连接部、第二连接部以及第三连接部形成与所述先导阀座相配合的收容区域；所述先导阀座的一端抵持所述第一连接部，另一端抵 持所述第三连接部。
进一步地，所述第一连接部与所述第三连接部关于所述第二连接部对称分布。
进一步地，所述托架组件包括托架、滑块以及簧片，所述托架连接于所述芯铁组件，所述滑块设置于所述托架上，所述簧片包括安装部和抵靠部，所述安装部连接于所述托架，所述抵靠部抵持所述滑块；所述抵靠部相对所述滑块的另一侧面设有挡片，所述挡片沿所述抵靠部边缘弯曲或弯折延伸。
进一步地，所述簧片上还设有用于连接所述安装部与所述抵靠部的连接部，所述连接部倾斜连接于所述抵靠部和所述安装部之间。
进一步地，所述挡片相对于所述抵靠部所在的平面垂直设置。
进一步地，所述挡片与所述抵靠部为一体成型结构；或者，
所述挡片与所述抵靠部为分体设置。
进一步地，所述抵靠部的一侧面设有朝向所述滑块延伸并用于按压所述滑块的按压部。
本申请还提供一种先导阀安装组件，包括第一支架、第二支架以及如上述任意一项所述的先导阀；
所述第一支架的一侧设置有焊接固定于所述先导阀的至少一个第一固定部，所述第一支架相对于所述第一固定部的另一侧设置有第一焊接面，所述第一焊接面上设置有定位凸台；
所述第二支架的一侧设置有焊接固定于所述换向阀的至少一个第二固定部，所述第二支架相对于所述第二固定部的另一侧设置有第二焊接面，所述第二焊接面上开设供定位凸台通过的定位孔；
所述定位凸台嵌入所述定位孔中，且所述第一焊接面焊接固定在所述第二焊接面上。
进一步地，所述定位凸台呈腰型，所述定位孔为对应于所述定位凸台的腰型孔。
进一步地，所述第一固定部焊接固定所述先导阀的一侧表面为第一连接面，所述第一连接面呈弧形并与先导阀的管壁外表面相贴合；及/或，
所述第二固定部焊接固定所述换向阀的一侧表面定义为第二连接面，所述第二连接面呈弧形并与所述换向阀的管壁外表面相贴合。
进一步地，所述第一固定部的数量为三个以上，三个以上的所述第一固定部分成两组并分别位于所述定位凸台的相对两侧；或者，
所述第二固定部的数量为三个以上，三个以上的所述第二固定部分成两组分别位于所述定位孔的相对两侧。
进一步地，所述第一支架包括至少一个第一底板以及至少两个第一连接板；所述定位凸台固定在所述第一底板的一侧上，所述第一底板相对所述定位凸台的另一侧固定连接于两个所述第一连接板，两个所述第一连接板分别固定两个第一固定部。
进一步地，所述第二支架包括至少一个第二底板以及至少两个第二连接板；所述定位孔开设在所述第二底板上，所述第二底板上固定两个所述第二连接板，两个所述第二连接板分别固定连接两个所述第二固定部。
本申请还提供一种换向阀组，包括换向阀及连接于所述换向阀的先导阀安装组件，所述先导阀安装组件为上述任意一项所述的导阀安装组件。
本申请提供的先导阀，通过在芯铁组件与先导阀座之间增设套环，利用套环中的环口 的内壁对芯铁组件的定位起到了引导作用，提高了芯铁组件装配时定位的准确度。同时能够在长期的工作过程中，避免芯铁组件与先导阀座之间发生直接触碰，并起到一定的缓冲作用，保证了芯铁组件定位的稳定性，延长了使用寿命。
本发明的以上以及其他有益效果将在接下来的描述中进一步阐述。
附图说明
图1为本申请第一个实施方式中先导阀的剖视结构示意图。
图2为图1所示先导阀座的立体结构示意图。
图3为图1所示先导阀中套环的结构示意图。
图4为本申请第二个实施方式中先导阀的结构示意图。
图5为图4所示先导阀中套环的立体结构示意图。
图6为本申请第三个实施方式中先导阀的结构示意图。
图7为图6所示先导阀中簧片的立体结构示意图。
图8为图6所示簧片在另一视角下的立体结构示意图。
图9为本申请第四个实施方式中先导阀所采用的簧片的立体结构示意图。
图10为本申请提供的换向阀组的结构示意图。
图11为图10所示换向阀组中第一支架的结构示意图。
图12为图10所示换向阀组中第二支架的结构示意图。
图13为本申请第五个实施方式中换向阀组的结构示意图。
图14为本申请第六个实施方式中换向阀组的结构示意图。
图中：100-先导阀；10-导管；20-先导阀座；20a-先导阀座；21-先导阀口；22-定位台阶；23-上半区域；24-下半区域；30-芯铁组件；31-芯铁；32-吸引子；33-弹性元件；40-套环；40a-套环；41-第一连接部；42-第二连接部；41a-第一连接部；42a-第二连接部；411-环口；43-第三连接部；44-收容区域；50-托架组件；51-托架；52-簧片；53-滑块；54-固定座；521-安装部；522-抵靠部；523-挡片；524-连接部；525-按压部；52a-簧片；523a-挡片；522a-抵靠部；；60-毛细管组件；61-E毛细管；62-S毛细管；63-C毛细管；64-D毛细管；200-换向阀组；201-换向阀；202-先导阀安装组件；300-第一支架；301-第一固定部；304-第一焊接面；303-定位凸台；305-第一底板；306-第一连接板；302-第一连接面；400-第二支架；401-第二固定部；404-第二焊接面；403-定位孔；405-第二底板；406-第二连接板；402-第二连接面；301a-第一固定部；401a-第二固定部；301b-第一固定部；401b-第二固定部。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明的是，当组件被称为“装设于”另一个组件，它可以直接装设在另一个组件上或者也可以存在居中的组件。当一个组件被认为是“设置于”另一个组件，它可以是直接 设置在另一个组件上或者可能同时存在居中组件。当一个组件被认为是“固定于”另一个组件，它可以是直接固定在另一个组件上或者可能同时存在居中组件。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是旨在于限制本申请。本文所使用的术语“或/及”包括一个或多个相关的所列项目的任意的和所有的组合。
本申请提供一种先导阀100，先导阀100用于驱动外部控制阀启闭。
本实施方式中，先导阀100应用于制冷系统中，此时的外部控制阀为制冷系统中的换向阀；先导阀100通过对制冷系统中换向阀的先导式控制，驱动换向阀改变自身的运行状态并切换制冷系统中冷媒的流向。
可以理解，在其他的实施方式中，先导阀100还可以应用于除制冷系统之外的管道系统中，只要该管道系统能够应用本申请提供的先导阀100即可。
具体地，先导阀100包括导管10、先导阀座20、芯铁组件30、套环40、托架组件50以及毛细管组件60。先导阀座20、芯铁组件30、套环40以及托架组件50均设置于导管10的内部，先导阀座20与芯铁组件30相对设置并固定连接于导管10以及毛细管组件60，套环40设置于先导阀座20与芯铁组件30之间，托架组件50固定连接于芯铁组件30，毛细管组件60固定连接于导管10并连通外部换向阀。
导管10用于容置先导阀座20、芯铁组件30、套环40以及托架组件50；先导阀座20用于固定毛细管组件60并承载部分的托架组件50；芯铁组件30用于带动托架组件50往复滑动；套环40用于定位芯铁组件30并避免芯铁组件30与先导阀座20之间的直接碰撞；托架组件50用于控制和调节毛细管组件60内的流体介质的运行状态。
当芯铁组件30在断电状态与失电状态下切换时，芯铁组件30在导管10内的往复滑移会带动托架组件50同样在导管10内往复滑移；托架组件50在先导阀座20上的位置变化改变了毛细管组件60内不同毛细管的流通关系，从而实现对流体介质流通方向的改变和对外部换向阀状态调节的驱动。
本实施例中，导管10是横截面呈圆环形的管体，导管10的内部中空并呈圆筒状，导管10由不锈钢材料制成。可以理解，在其他的实施方式中，导管10的横截面还可以采用正方形等除圆环形之外的其他形状，导管10的材质还可以采用黄铜等除不锈钢之外的其他材料，只要该导管10的形状与材质不影响先导阀100基本功能的实现即可。
请一并参阅图2，图2为图1所示先导阀座20的立体结构示意图。先导阀座20贴靠导管10的内壁并固定连接于毛细管组件60。先导阀座20上开设有多个先导阀口21，先导阀口21连通毛细管组件60中的毛细管；当托架组件50在先导阀座20的表面上不断滑移时，托架组件50能够使得不同的先导阀口21实现连通，从而实现连通毛细管组件60中的不同毛细管，进而实现对毛细管组件60内的流体介质的控制功能。
本实施方式中，先导阀口21的数量为三个，三个先导阀口21之间相间隔设置。可以理解，在其他的实施方式中，先导阀口21的数量可以根据工况调整为超过三个的数量。
先导阀座20的横截面大致呈半圆形，纵截面大致呈矩形。在本实施例中，为了提高与导管10的配合性，先导阀座20也由不锈钢材料制成。当然，在其他的实施方式中，先导阀座20还可以采用黄铜等除不锈钢之外的其他材料。
本实施方式中，先导阀座20相对靠近芯铁组件30的端面自上而下分为上半区域23和下半区域24，上半区域23朝向芯铁组件30延伸并与下半区域24形成错位，错位后的上半区域23与下半区域24之间形成定位台阶22。
本实施方式提供的先导阀座20上的定位台阶22是先导阀座20的上半区域23与下半区域24错位形成，与将定位台阶22直接凸设在导管10的内壁上或者阀体(传统结构中与导管10分体设置，且用于承载毛细管组件50的部件)的内壁上的方案相比，有效降低了阀体本身的加工的难度；并且定位台阶22的加工可以直接依托于先导阀座20的加工，例如可以采用冲压成型等工艺，不仅方便便捷，而且可以提高加工效率。
芯铁组件30包括芯铁31、吸引子32以及弹性元件33，芯铁31贴靠导管10的内壁并连接于托架组件50，弹性元件33的一端抵持于吸引子32，另一端抵持于芯铁31。
当吸引子32处于通电的状态下，吸引子32可以通过自身的磁力吸引芯铁31克服弹性元件33的阻力并朝向吸引子32运动；此时芯铁31同时带动托架组件50朝向吸引子32运动，并表现为托架组件50朝靠近吸引子32的方向在先导阀座20上滑动。
当吸引子32处于失电的状态下，弹性元件33在受压后的回弹能够驱动芯铁31朝远离吸引子32的方向运动；此时芯铁31同时带动托架组件50朝远离吸引子32的方向运动，并表现为托架组件50朝远离吸引子32的方向在先导阀座20上滑动。
本实施方式中，弹性元件33为弹簧。可以理解，在其他的实施方式中，弹性元件33还可以为弹性球等除弹簧之外的其他元件。
请一并参阅图3，图3为图1所示先导阀100中套环40的结构示意图。套环40容置于导管10在先导阀座20与芯铁组件30之间的部分内，套环40包括相互连接的第一连接部41和第二连接部42。
第一连接部41是主体为横截面呈圆环形的环体，第一连接部41与导管10的内壁之间可以通过焊接等方式相互固定，第一连接部41的中间开设有中空的环口411，且第一连接部41沿水平方向等分为上环区域和下环区域。
本实施方式中，第一连接部41的下环区域与定位台阶22的外缘卡接固定，并使先导阀座20错位后的上半区域23穿置于环体的环口411内，类似于卡环和环形卡块的结构。
第一连接部41在本实施方式中为圆环形。可以理解，只要不影响第一连接部41与先导阀座20和定位台阶22之间的装配，第一连接部41也可以为方环形等其他形状。
本实施方式中，第二连接部42是主体呈半圆筒状的筒体。第二连接部42正对设置在先导阀座20的顶部，并且可以通过焊接等方式固定在导管10的管壁上，从而提高整体的稳定性。第二连接部42固定在第一连接部41的上环区域，并且位于相对远离芯铁组件30的一侧。
本实施方式中的第一连接部41与第二连接部42之间的连接方式可以是一体式冲压成型，也可以是分体式焊接固定，只要不影响套环40与定位台阶22之间的装配，还可以是其他的连接方式。
在组装时，可先将具有定位台阶22的先导阀座20安装在导管10内，然后对套环40与定位台阶22装配；再将第一连接部41的下环区域贴近定位台阶22的外缘，然后使先导阀座20的上半区域23穿入第一连接部41的环口411内，以完成第一连接部41与定位台阶22的卡接固定，然后将套环40与导管10之间以焊接等方式固定在一起，再进行后续其他各部 件之间的组装。
托架组件50固定于芯铁组件30上，并大致沿导管10的轴向延伸至先导阀座20处。托架组件50包括托架51、簧片52、滑块53以及固定座54，托架51的一端固定连接于芯铁31，滑块53与固定座54均套设并固定连接于托架51，簧片52的一端夹设于托架51与固定座54之间，另一端在固定座54的压持作用下贴靠于滑块53的表面上，从而将滑块53压靠在先导阀座20的表面上。
芯铁31在导管10内的往复滑动会通过托架51带动滑块53在先导阀座20上滑动；当滑块53在先导阀座20上滑动时，滑块53上开设的通孔便会连通毛细管组件60中的不同毛细管。
本实施方式中，滑块53为开口朝下的滑碗。可以理解，在其他的实施方式中，滑块53还可以采用除图示之外的其他结构，只要滑块53可以实现不同毛细管之间的连通即可。
毛细管组件60包括四个毛细管，分别为E毛细管61、S毛细管62、C毛细管63以及D毛细管64。对应地，先导阀座20上分别开设有与E毛细管61、S毛细管62及C毛细管63分别对应匹配的E毛细管接口、S毛细管接口和C毛细管接口。D毛细管64插接在导管10远离芯铁组件30的一端，并与导管10内连通，以使D毛细管64更加适配于的导管10的管形。
可以理解，本申请并不限制毛细管的具体数量，毛细管的具体数量可根据实际生产需要进行选择。
先导阀100在吸引子32断电的情况下，弹性元件33将推动芯铁31朝向定位台阶22滑动并与套环40产生触碰，此时套环40内的第一连接部41会对芯铁31产生一定的缓冲作用，并且防止芯铁31与定位台阶22直接接触造成损坏。与此同时，芯铁31将推动托架51以及滑块53向定位台阶22滑动，以使E毛细管61与S毛细管62连通，且C毛细管63与D毛细管64连通。
先导阀100在吸引子32通电的情况下，吸引子32吸引芯铁31朝远离定位台阶22的方向滑动，使套环40的第一连接部41与芯铁31分离，芯铁31带动托架51以及滑块53朝远离定位台阶22方向滑动，以使S毛细管62与C毛细管63连通，且E毛细管61与D毛细管64连通。
本申请第一个实施方式中提供的先导阀100，通过将先导阀座20、芯铁组件30均收容于同一导管10内，缩小了整个设备的体积、降低了加工难度和生产成本。同时也避免了传统先导阀中阀体与导管之间焊接密封性较差的问题出现。
同时将定位台阶22设置在先导阀座20上，有效降低了加工难度。同时通过在芯铁组件30与先导阀座20之间增设套环40，利用套环40中的环口411的内壁对芯铁组件30的定位起到了引导作用，提高了芯铁组件30装配时定位的准确度。同时能够在长期的工作过程中，避免芯铁组件30与先导阀座20之间发生直接触碰，并起到一定的缓冲作用，保证了芯铁组件30定位的稳定性，延长了使用寿命。
请一并参阅图4及图5，图4为本申请第二个实施方式中先导阀100的结构示意图，图5为图4所示先导阀100中套环40a的立体结构示意图。
本申请第二个实施方式与本申请第一个实施方式的区别在于，本申请第二个实施方式中的先导阀座20a和套环40a与本申请第一个实施方式中的先导阀座20和套环40不同。
本申请第二个实施方式中的先导阀座20a在面向芯铁组件30端面的上半区域23和下半区域24是同步延伸，并且先导阀座20a的上半区域23与下半区域24的延伸长度相同。也即先导阀座20a中不再存在定位台阶22，先导阀座20a面向芯铁组件30的端面为平面，此时先导阀座20a通过上半区域23与下半区域24(即面向芯铁组件30的端面)同时抵持套环40a。
同时套环40a内还增设了一个第三连接部43。第三连接部43为横截面呈圆环形且与第一连接部41a大致匹配的环体。第三连接部43固定在第二连接部42a远离第一连接部41a的一侧。
本实施方式中，第三连接部43为圆环形，也可以为方环形，只要第三连接部43不影响自身与先导阀座20a之间的装配，也可以是其他形状。优选地，第三连接部43与第一连接部41a的形状与尺寸保持一致。
第一连接部41a、第二连接部42a和第三连接部43相互连接并形成与先导阀座20a相配合的收容区域44。此时套环40a整体上为双边对称结构，稳定度更高。第一连接部41a、第二连接部42a和第三连接部43连接组成的收容区域44与本申请第二个实施方式中的先导阀座20a可以更好地相互配合，避免先导阀座20a与套环40a之间发生相对滑移。
本实施方式中的第一连接部41a、第二连接部42a和第三连接部43之间的连接方式可以是一体式冲压成型也可以是分体式焊接固定，只要不影响套环40a与先导阀座20a之间的装配，还可以是其他的连接方式。
本申请第二个实施方式中提供的先导阀100，通过先导阀座20a在套环40a上的抵持以及套环40a对芯铁组件30的抵持来定位芯铁组件30，利用套环40a的定位功能同样避免了需要在阀体或者导管10的内壁上凸设凸台，有效降低了先导阀100的加工难度。
而且，套环40a的对称结构进一步提升了先导阀座20a在套环40a内的连接稳定性，延长了使用寿命。
请一并参阅图6至图8，图6为本申请第三个实施方式中先导阀100的结构示意图，图7为图6所示先导阀100中簧片52的立体结构示意图，图8为图6所示簧片52在另一视角下的立体结构示意图。
虽然本申请第三个实施例中所采用的簧片52仅应用在本申请图6所示的先导阀100中，但可以理解的是，本申请第三个实施方式中提供的簧片52还可以同样应用至本申请的第一个实施例(图1)以及第二个实施例(图4)中。
簧片52包括安装部521和抵靠部522，安装部521与拖架51相连接，抵靠部522的一侧面与滑块53顶部相接触并抵压滑块53，簧片52具有一定弹性，并用于防止滑块53沿安装孔的轴线方向滑动脱离安装孔，保证先导阀100能够正常工作。
综合考虑簧片52的作用与经济效益，簧片52的材质一般选用弹性性能较好的金属，通过简单的冲压折弯形成薄壁状的簧片52，既能满足簧片52抵压滑块，防止滑块脱离拖动架，又能节约成本，提高经济效益。
在抵靠部522背向滑块53的侧面上还设置有挡片523，当流动在管路中的介质压力过大时，介质会冲撞滑块53，当介质冲撞滑块53的力超过簧片52抵压滑块53的力时，滑块53带动簧片52朝向导管10的内壁方向移动，随着介质作用于滑块53的力的增大，簧片52上的挡片523会与导管10的内壁抵触，限制簧片52的进一步移动，避免滑块53的进一步移动脱离拖架51。当簧片52与导管10的内壁抵靠或冲撞的力较大时，挡片523可能发生 变形，从而使簧片52失去限制滑块53脱离拖架51的目的。因此，挡片523沿抵靠部522边缘弯曲或弯折延伸，这样，由于挡片523为弯曲或弯折延伸的结构，其结构刚度相比于平直的薄壁结构有所增加，在挡片523与导管10的内壁冲撞时，可以有效的减少挡片523的变形。
本实施方式中，抵靠部522边部带有弧形段，挡片523沿抵靠部522边缘弯曲延伸，从而相对于抵靠部522形成半包围结构，进而加强了挡片523的强度，防止簧片52受到较大的冲击力时，挡片523与导管10内壁相撞导致挡片523弯折的现象，有利于簧片52更好地抵压滑块53，进而保证先导阀100正常工作。
本实施方式中，挡片523沿抵靠部522相邻的三个边弯曲延伸，从而形成了半包围结构的挡片523，在其他的实施方式中，挡片523也可为沿抵靠部522相邻两个边弯曲延伸形成的半包围结构，或为相对于抵靠部522形成的全包围结构，并不做具体的限定，只要通过设置弯曲延伸的挡片523，加强了挡片523抗冲击变形的刚度，保证挡片523与导管10内壁相撞时不会出现折弯即可。
进一步地，簧片52还包括连接部524，连接部524设置在安装部521与抵靠部522之间，连接部524的一端与安装部521相连接，连接部524的另一端与抵靠部522相连接，连接部524倾斜连接于安装部521与抵靠部522之间，从而使得抵靠部522的水平位置高于安装部521的水平位置。
如此设置，有利于抵靠部522配合抵压滑块53。因为簧片52具有一定的弹性，当介质作用在滑块53上的力大于抵靠部522作用在滑块53上的力时，簧片52会发生弹性变形，而倾斜设置的连接部524会作为变形部位，在力的作用下倾斜程度增加。当介质作用在滑块53上的力逐渐变小，直至小于抵靠部522作用在滑块53上的力时，变形的连接部524会恢复原来的形状，从而实现抵靠部522始终抵压滑块53，以可靠地防止滑块53脱离拖架51。
设置在抵靠部522上的挡片523相对于抵靠部522所在的平面基本垂直设置，当介质压力过大且冲撞滑块53时，受滑块53冲力的影响，抵靠部522被向上推动。当抵靠部522被推动一定程度后，挡片523与导管10的内壁相抵，由于挡片523与抵靠部522所在的平面基本垂直。所以导管10的内壁向挡片523施力时，挡片523不易发生其他角度的弯折，有利于先导阀100正常工作。
本实施方式中，挡片523是由抵靠部522翻边形成的一体成型结构，从而方便挡片523的加工，有利于量产。当然，在其他的实施方式中，挡片523与抵靠部522也可为分体结构，挡片523可通过胶粘连接或焊接固定于所述抵靠部522，并不做具体的限定。
进一步地，簧片52在抵靠部522抵压滑块53的一侧还设置有按压部525，抵靠部522通过按压部525抵压滑块53，有利于抵靠部522更好地对滑块53施力，进一步防止滑块53脱离拖架51。
请一并参阅图9，图9为本申请第四个实施方式中先导阀100所采用的簧片52a的立体结构示意图。
本申请第四个实施方式中的簧片52a的结构与本申请第三个实施方式中的簧片52的区别点是，抵靠部522a的边部均为直线段，挡片523a沿抵靠部522a边部弯折延伸，同样也能够加强挡片523a的强度，防止挡片523a弯折。
当然，挡片523a沿抵靠部522a相邻的三个边弯折延伸，同样不是具体的限定，在其他的实施方式中，也可像上述所述，挡片523a为沿抵靠部522a相邻两个边弯曲延伸、相对 于抵靠部522a形成的半包围结构，或沿抵靠部522a边部延伸的全包围结构。
请一并参阅图10至图12，图10为本申请提供的换向阀组200的结构示意图，图11为图10所示换向阀组200中第一支架300的结构示意图，图12为图10所示换向阀组200中第二支架400的结构示意图。
换向阀组200包括换向阀201以及安装在换向阀201上的先导阀安装组件202。先导阀安装组件202包括上述的先导阀100、第一支架300以及第二支架400。先导阀100通过第一支架300以及第二支架400安装至换向阀201上。
本申请提供的换向阀组200，其中的换向阀201与先导阀100之间不再是传统上的机械铆接结构，换向阀201通过第一支架300与第二支架400之间的嵌设配合实现与先导阀100之间的固定连接，能够克服传统换向阀组200中不易装配、容易铆偏、共振频率低的技术缺陷。
第一支架300的一侧设置有用于焊接先导阀100的至少一个第一固定部301，第一支架300相对于第一固定部301的另一侧设置有第一焊接面304，且第一焊接面304上设置定位凸台303。
第二支架400的一侧设置有用于焊接换向阀201的至少一个第二固定部401，第二支架400相对于第二固定部401的另一侧设置有第二焊接面404，且第二焊接面404上开设供定位凸台303通过的定位孔403。
其中，定位凸台303嵌入定位孔403中，且第一焊接面304焊接固定在第二焊接面404上。在其他实施例中，第一焊接面304与第二焊接面404可通过激光焊接连接固定；定位凸台303可呈腰型，定位孔403也对应地为腰型孔。
本申请的提供的先导阀安装组件202通过对先导阀100和换向阀201分别设计支架，再通过与对应支架的焊接固定来实现先导阀100和换向阀201之间的无机械铆接结构的间接固定，能够克服传统结构中不易装配、容易铆偏、共振频率低的技术缺陷。
为了让第一固定部301能更好的与先导阀100的管壁外表面相贴合，第一固定部301焊接固定先导阀100的一侧表面定义为第一连接面302，第一连接面302呈弧形以与先导阀100的管壁外表面相贴合。
为了让第二固定部401能更好的与换向阀201的管壁外表面相贴合，第二固定部401焊接固定换向阀201的一侧表面定义为第二连接面402，第二连接面402呈弧形以与换向阀201的管壁外表面相贴合。
在本实施例中，第一固定部301的数量为两个，两个第一固定部301别位于定位凸台303的相对两侧；第二固定部401的数量也为两个，两个第二固定部401分别位于定位孔403的相对两侧。当然，第一固定部301的数量可以为一个或更多，第二固定部401的数量也可以为一个或更多。
在本实施例中，第一支架300可包括第一底板305、两个第一连接板306、两个所述的第一固定部301和所述的定位凸台303。定位凸台303固定在第一底板305的一侧上，第一底板305的相对另一侧上固定两个第一连接板306。两个第一连接板306可相对设置在第一底板305上，且分别固定两个第一固定部301。
第二支架400可包括第二底板405、两个第二连接板406、两个所述的第二固定部401和所述的定位孔403。定位孔403开设在第二底板405上，第二底板405上固定两个第二连 接板406。两个第二连接板406可相对设置在第二底板405上，且分别固定两个第二固定部401。
另外，为了增强先导阀和换向阀固定结构的结构强度，两个支架均可采用一体成型结构。
先导阀100与换向阀201在固定时，可以采用如下实施步骤：
第一支架300与先导阀100通过激光焊接、炉中钎焊等方式相互焊接固定；
第二支架400与换向阀201通过激光焊接、炉中钎焊等方式相互焊接固定；
将第一支架300的定位凸台303装入到第二支架400的定位孔403中；
再将第一支架300的第一焊接面304和第二支架400的第二焊接面404通过激光焊接等连接起来。
请一并参阅图13，图13为本申请第五个实施方式中换向阀组200的结构示意图。
在本实施方式中，换向阀组200中的第一支架300的第一固定部301a的数量为一个，该第一固定部301a相当于图11中的两个第一固定部301相对延伸并形成一体。此时第一固定部301a能够以较大的面积焊接于先导阀100。
同样的，第二支架400中的第二固定部401a的数量为一个，该第二固定部401a相当于图12中的两个第二固定部401相对延伸并形成一体。此时第二固定部401a能够以较大的面积焊接于先导阀100。
请一并参阅图14，图14为本申请第六个实施方式中换向阀组200的结构示意图。
在本实施方式中，换向阀组200中的第一支架300的第一固定部301b的数量为三个，三个第一固定部301b分成两组分别位于定位凸台303的相对两侧；
第二固定部401b的数量也为多个，多个第二固定部401b分成两组分别位于定位孔403的相对两侧。
本申请提供的先导阀安装组件202以及具有该先导阀安装组件202的换向阀组200，能够实现换向阀201与先导阀100之间的稳定连接，能够克服传统结构中不易装配、容易铆偏、共振频率低的技术缺陷，具有广泛的应用前景。
以上所述实施例的各技术特征可以进行任意的组合，为使描述简洁，未对上述实施例中的各个技术特征所有可能的组合都进行描述，然而，只要这些技术特征的组合不存在矛盾，都应当认为是本说明书记载的范围。
本技术领域的普通技术人员应当认识到，以上的实施方式仅是用来说明本申请，而并非用作为对本申请的限定，只要在本申请的实质精神范围内，对以上实施方式所作的适当改变和变化都落在本申请要求保护的范围内。

Claims (18)

  1. 一种先导阀(100)，包括：
    导管(10)；
    先导阀座(20,20a)，所述先导阀座(20,20a)收容于所述导管(10)内；
    芯铁组件(30)，所述芯铁组件(30)收容于所述导管(10)内并位于所述先导阀座(20,20a)的一侧；
    托架组件(50)，所述托架组件(50)固定连接于芯铁组件(30)并滑动连接于先导阀座(20,20a)，托架组件(50)能够跟随芯铁组件(30)在导管(10)内往复滑动；
    其特征在于，所述先导阀(100)还包括套环(40,40a)，所述套环(40,40a)容置于位于所述先导阀座(20,20a)与所述芯铁组件(30)之间的所述导管(10)内，所述先导阀座(20,20a)抵持所述套环(40,40a)并通过所述套环(40,40a)定位所述芯铁组件(30)。
  2. 如权利要求1所述的先导阀，其特征在于，所述先导阀座(20)面向所述芯铁组件(30)的端面自上而下分为上半区域(23)和下半区域(24)，所述上半区域(23)朝向所述芯铁组件(30)延伸以与所述下半区域(24)形成错位，错位后的所述上半区域(23)与所述下半区域(24)之间形成定位台阶(22)；所述先导阀座(20)通过所述定位台阶(22)卡接所述套环(40)。
  3. 如权利要求2所述的先导阀，其特征在于，所述套环(40)包括第一连接部(41)以及连接于所述第一连接部(41)的第二连接部(42)，所述第一连接部(41)上开设有环口(411)；所述定位台阶(22)抵持于所述环口(411)的内壁。
  4. 如权利要求1所述的先导阀，其特征在于，所述先导阀座(20a)面向所述芯铁组件(30)的端面为平面，所述先导阀座(20a)通过面向所述芯铁组件(30)的端面抵持所述套环(40a)。
  5. 如权利要求4所述的先导阀，其特征在于，套环(40a)包括第一连接部(41a)、第二连接部(42a)以及第三连接部(43)，所述第二连接部(42a)连接于所述第一连接部(41a)与所述第三连接部(43)之间，所述第一连接部(41a)、第二连接部(42a)以及第三连接部(43)形成与所述先导阀座(20a)相配合的收容区域(44)；所述先导阀座(20a)的一端抵持所述第一连接部(41a)，另一端抵持所述第三连接部(43)。
  6. 如权利要求5所述的先导阀，其特征在于，所述第一连接部(41a)与所述第三连接部(43)关于所述第二连接部(42a)对称分布。
  7. 如权利要求1所述的先导阀，其特征在于，所述托架组件(50)包括托架(51)、滑块(53)以及簧片(52,52a)，所述托架(51)连接于所述芯铁组件(30)，所述滑块(53)设置于所述托架(51)上，所述簧片(52,52a)包括安装部(521)和抵靠部(522)，所述安装部(521)连接于所述托架(51)，所述抵靠部(522)抵持所述滑块(53)；所述抵靠部(522)相对所述滑块(53)的另一侧面设有挡片(523)，所述挡片(523)沿所述抵靠部(522)边缘弯曲或弯折延伸。
  8. 如权利要求7所述的先导阀，其特征在于，所述簧片(52)上还设有用于连接所述安装 部(521)与所述抵靠部(522)的连接部(524)，所述连接部(524)倾斜连接于所述抵靠部(522)和所述安装部(521)之间。
  9. 如权利要求7所述的先导阀，其特征在于，所述挡片(523)相对于所述抵靠部(522)所在的平面垂直设置。
  10. 如权利要求7所述的先导阀，其特征在于，所述挡片(523)与所述抵靠部(522)为一体成型结构；或者，
    所述挡片(523)与所述抵靠部(522)为分体设置。
  11. 如权利要求7所述的先导阀，其特征在于，所述抵靠部(522)的一侧面设有朝向所述滑块(3)延伸并用于按压所述滑块(3)的按压部(222)。
  12. 一种先导阀安装组件(202)，其特征在于，包括第一支架(300)、第二支架(400)以及如权利要求1至11任意一项所述的先导阀(100)；
    所述第一支架(300)的一侧设置有焊接固定于所述先导阀(100)的至少一个第一固定部(301)，所述第一支架(300)相对于所述第一固定部(301)的另一侧设置有第一焊接面(23)，所述第一焊接面(23)上设置有定位凸台(303)；
    所述第二支架(400)的一侧设置有焊接固定于所述换向阀(201)的至少一个第二固定部(401)，所述第二支架(400)相对于所述第二固定部(401)的另一侧设置有第二焊接面(404)，所述第二焊接面(404)上开设供定位凸台(303)通过的定位孔(403)；
    所述定位凸台(303)嵌入所述定位孔(403)中，且所述第一焊接面(23)焊接固定在所述第二焊接面(404)上。
  13. 如权利要求12所述的先导阀安装组件(202)，其特征在于，所述定位凸台(303)呈腰型，所述定位孔(403)为对应于所述定位凸台(303)的腰型孔。
  14. 如权利要求12所述的先导阀安装组件(202)，其特征在于，所述第一固定部(301)焊接固定所述先导阀(100)的一侧表面为第一连接面(302)，所述第一连接面(302)呈弧形并与先导阀(100)的管壁外表面相贴合；及/或，
    所述第二固定部(401)焊接固定所述换向阀(201)的一侧表面定义为第二连接面(402)，所述第二连接面(402)呈弧形并与所述换向阀(201)的管壁外表面相贴合。
  15. 如权利要求12所述的先导阀安装组件(202)，其特征在于，所述第一固定部(301)的数量为三个以上，三个以上的所述第一固定部(301)分成两组并分别位于所述定位凸台(303)的相对两侧；或者，
    所述第二固定部(401)的数量为三个以上，三个以上的所述第二固定部(401)分成两组分别位于所述定位孔(403)的相对两侧。
  16. 如权利要求12所述的先导阀安装组件(202)，其特征在于，所述第一支架(300)包括至少一个第一底板(305)以及至少两个第一连接板(306)；所述定位凸台(303)固定在所述第一底板 (305)的一侧上，所述第一底板(305)相对所述定位凸台(303)的另一侧固定连接于两个所述第一连接板(306)，两个所述第一连接板(306)分别固定两个第一固定部(301)。
  17. 如权利要求12所述的先导阀安装组件(202)，其特征在于，所述第二支架(400)包括至少一个第二底板(405)以及至少两个第二连接板(406)；所述定位孔(403)开设在所述第二底板(405)上，所述第二底板(405)上固定两个所述第二连接板(406)，两个所述第二连接板(406)分别固定连接两个所述第二固定部(401)。
  18. 一种换向阀组(200)，包括换向阀(201)及连接于所述换向阀的先导阀安装组件，其特征在于，所述先导阀安装组件为权利要求1至15任意一项所述的导阀安装组件(202)。
PCT/CN2019/119007 2019-04-25 2019-11-16 先导阀、先导阀安装组件及换向阀组 WO2020215705A1 (zh)

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