CN112503203B - Control valve - Google Patents
Control valve Download PDFInfo
- Publication number
- CN112503203B CN112503203B CN201910870052.7A CN201910870052A CN112503203B CN 112503203 B CN112503203 B CN 112503203B CN 201910870052 A CN201910870052 A CN 201910870052A CN 112503203 B CN112503203 B CN 112503203B
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- China
- Prior art keywords
- valve
- fluid outlet
- control valve
- valve core
- outlet end
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- 239000012530 fluid Substances 0.000 claims abstract description 124
- 238000007789 sealing Methods 0.000 claims abstract description 54
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 230000013011 mating Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 13
- 238000004891 communication Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 230000006978 adaptation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0647—Spindles or actuating means
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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
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
-
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Valve Housings (AREA)
- Sliding Valves (AREA)
Abstract
According to the control valve provided by the invention, when the pressure difference force between the fluid inlet end and the fluid outlet end is smaller than the set force, the first sealing part is abutted against the valve core, and when the pressure difference force between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can overcome the elastic force of the elastic part to move towards the fluid outlet end, and the fluid at the fluid inlet end flows into the valve core cavity through the gap between the first sealing part and the valve core, so that the pressure relief purpose is achieved. Compared with the mode that the ball valve is connected with the one-way valve in parallel in the background art, the control valve is compact in structure.
Description
Technical Field
The invention relates to the technical field of fluid control, in particular to a control valve.
Background
Fig. 13 is a schematic diagram of a parallel structure of a ball valve and a check valve in the background art. At present, in a refrigeration system, when a ball valve 01 is closed, liquid refrigerant retained in an inlet end pipeline part 03 of the ball valve 01 can increase in pressure along with the increase of ambient temperature, and in order to reduce the risk of damage to parts in the system caused by overhigh pressure, the ball valve 01 and a one-way valve 02 are generally arranged on different pipelines respectively in a parallel mode, and the aim of pressure relief is achieved through the one-way valve 02. Such a structure is relatively complex.
In view of this, it is an improvement to those skilled in the art how to optimize the structure of the valve.
Disclosure of Invention
The invention aims to provide a control valve, which comprises a valve body, a valve seat, a valve core, a valve rod, a first sealing component and a second sealing component, wherein the valve body is fixedly connected with the valve seat, the valve core is arranged in a valve cavity of the control valve, the valve core comprises a valve core cavity, the valve core cavity can be communicated with a fluid inlet end and a fluid outlet end, the valve rod can drive the valve core to circumferentially rotate,
The first sealing component is positioned on one side of the valve core, which is close to the fluid inlet end, the second sealing component is positioned on one side of the valve core, which is close to the fluid outlet end, the second sealing component is abutted against the valve core, the control valve further comprises an elastic piece, one end of the elastic piece is abutted against the valve body or the valve seat, the other end of the elastic piece is abutted against the second sealing component, when the pressure difference between the fluid inlet end and the fluid outlet end is smaller than a set force in the valve closing state of the control valve, the first sealing component is abutted against the valve core, the valve core cavity is communicated with the fluid outlet end of the control valve, the valve core cavity is not communicated with the fluid inlet end of the control valve, and when the pressure difference between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can overcome the elastic force of the elastic piece to move towards the fluid outlet end, and fluid at the fluid inlet end flows into the valve core cavity through the gap between the first sealing component and the valve core.
According to the control valve provided by the embodiment, when the pressure difference force between the fluid inlet end and the fluid outlet end is smaller than the set force, the first sealing part is abutted against the valve core, when the pressure difference force between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can overcome the elastic force of the elastic part to move towards the fluid outlet end, the fluid at the fluid inlet end flows into the valve core cavity through the gap between the first sealing part and the valve core, the pressure relief purpose is achieved, and compared with the ball valve and the one-way valve in the prior art, the control valve is compact in structure.
Drawings
Fig. 1: the invention provides a valve opening state diagram of a control valve;
Fig. 2a: the invention provides a valve closing state diagram I of a control valve;
Fig. 2b: the second valve closing state diagram of the control valve is provided by the invention;
Fig. 3: a partially enlarged schematic illustration at I 1 in fig. 2;
Fig. 4: FIG. 2 is a schematic view of the first seal member;
Fig. 5: a partially enlarged schematic illustration at I 2 in fig. 2;
fig. 6: another second sealing member is schematically shown;
Fig. 7: FIG. 2 is a schematic illustration of the valve stem configuration;
fig. 8a: FIG. 2 is a schematic cross-sectional view of a valve cartridge;
Fig. 8b: the first valve core structure in FIG. 2;
Fig. 8c: a second schematic structural diagram of the valve core in fig. 2;
fig. 9: the structural schematic of the support in fig. 2;
fig. 10: the invention provides a valve closing state diagram of another control valve;
fig. 11: FIG. 10 is a schematic illustration of the structure of the valve stem;
fig. 12a: FIG. 10 is a schematic cross-sectional view of a valve cartridge;
Fig. 12b: FIG. 10 is a schematic diagram of the valve core;
fig. 13 is a schematic diagram of a parallel structure of a ball valve and a check valve in the background art.
In fig. 1 to 12 b:
1-valve body, 10-fluid inlet end, 100-valve cavity, 101-gap and 11-through hole;
12-mounting holes, 121-hole walls, 13-second step parts and 14-first grooves;
2-valve seat, 20-fluid outlet end, 21-second step, 211-first step wall;
22-a first annular groove, a 3/3' -valve core and a 30-valve core cavity;
31/31 '-first slot portion, 311/311' -first longitudinal side;
312/312' -second longitudinal side, 313-third step;
32-second slot portion, 321-fifth longitudinal side, 322-sixth longitudinal side;
33-communication channel, 34-bypass flow path, 4/4 '-valve stem, 41/41' -shaft portion;
411/411 '-third longitudinal side, 412/412' -fourth longitudinal side;
413-flange portion, 5-first sealing member, 51-first gasket, 52-boss portion;
6-a second sealing member, 61/61' -second gasket;
611-the peripheral wall of the second gasket, 62/62' -the second annular groove;
63-connecting members, 631-outer peripheral walls of the connecting members;
8-bonnet, 9-support, 91-mating segment, 911-seventh longitudinal side;
912-eighth longitudinal side, 92-base, 921-peripheral wall of base;
A-first take-over, B-second take-over.
Detailed Description
The core of this embodiment is to provide a control valve, in the valve closing state, when the pressure difference force between the fluid inlet end and the fluid outlet end is smaller than the set force, the first sealing component abuts against the valve core, when the pressure difference force between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can overcome the elastic force of the elastic component to move towards the fluid outlet end, the fluid at the fluid inlet end flows into the valve core cavity through the gap between the first sealing component and the valve core, the pressure release purpose is achieved, and compared with the ball valve and the one-way valve in the background art, which are respectively arranged on different pipelines, the control valve disclosed by the invention is compact in structure.
In order to better understand the aspects of the present invention, the present invention will be described in further detail with reference to the accompanying drawings and detailed description.
It should be noted that, the terms of upper and lower isotropic terms are defined in fig. 1 to 12b by the positions of the components in the drawings and the positions of the components with respect to each other, and are only used for the sake of clarity and convenience in expressing the technical solutions. It should be understood that the use of directional terms herein should not be construed to limit the scope of the application as claimed.
FIG. 1 is a valve opening state diagram of a control valve according to the present invention; FIG. 2a is a first valve closing state diagram of a control valve according to the present invention; FIG. 2b is a second valve closing state diagram of the control valve according to the present invention; FIG. 3 is an enlarged schematic view of a portion of the portion of FIG. 2 at I 1; FIG. 4 is a schematic view of the first seal member of FIG. 2; FIG. 5 is an enlarged schematic view of a portion of the portion of FIG. 2 at I 2; FIG. 6 is a schematic view of another second seal member; FIG. 7 is a schematic illustration of the valve stem of FIG. 2; FIG. 8a is a schematic cross-sectional view of the valve cartridge of FIG. 2; FIG. 8b is a schematic diagram of the valve core in FIG. 2; FIG. 8c is a second schematic structural view of the valve core of FIG. 2; fig. 9 is a schematic view of the structure of the support member in fig. 2.
As shown in fig. 1, the control valve of the present embodiment includes a valve body 1, a valve seat 2, a valve body 3, a valve stem 4, a first sealing member 5, a second sealing member 6, a bonnet 8, a first adapter a, and a second adapter B. The valve body 1 is made of a metal material by forging and comprises an inner cavity, a through hole 11 and a fluid inlet end 10, one end of the valve body 1 is welded and fixed with the second connecting pipe B, and the other end of the valve body 1 is in threaded connection or welded and fixed with the valve seat 2. The valve body 1 is connected with the valve cap 8 in a threaded manner. The valve seat 2 comprises a fluid outlet end 20, and the valve seat 2 is welded and fixed with the first adapter tube a. The valve rod 4 is approximately columnar, penetrates through the through hole 11 of the valve body 1, the upper end of the valve rod 4 extends out of the valve body 1, and the lower end of the valve rod 4 extends into the inner cavity of the valve body 1 and is connected with the key groove of the valve core 3. The valve core 3 is substantially spherical and is arranged in a valve cavity 100 of the control valve, the valve core 3 comprises a valve core cavity 30, the valve core 3 is arranged between the first sealing component 5 and the second sealing component 6, and the second sealing component 6 always abuts against the valve core 3. Specifically, the lower end of the valve rod 4 has a shaft portion 41, the shaft portion 41 extends into the first groove portion 31 of the valve core 3, the valve rod 4 can drive the valve core 3 to rotate circumferentially, and the valve core 3 rotates to enable the valve core cavity 30 to be communicated with the fluid inlet end 10 and the fluid outlet end 20. In the control valve closed state, the spool chamber 30 is in communication with the fluid outlet port 20 and the spool chamber 30 is not in communication with the fluid inlet port 10.
In this embodiment, as shown in fig. 1, 2a and 2b, the first sealing member 5 is located on one side of the valve core 3 near the fluid inlet end 10, that is, the first sealing member 5 is located on one side of the valve body 1, and the first sealing member 5 is fixedly connected or limitedly connected with the valve body 1; the second sealing member 6 is located on the side of the valve element 3 near the fluid outlet end, i.e. the second sealing member 6 is located on the side of the valve seat 2. The control valve further comprises an elastic member 7, in particular a spring, one end of the elastic member 7 abutting the valve seat 2 and the other end abutting the second sealing member 6. In the closed state of the control valve, when the pressure difference between the fluid inlet end 10 and the fluid outlet end 20 is smaller than the set force, as shown in fig. 2a, the first sealing member 5 abuts against the valve core 3; when the pressure difference force of the fluid inlet end 10 and the fluid outlet end 20 is larger than the set force, as shown in fig. 2b, the valve core 3 can move toward the fluid outlet end 20 against the elastic force of the elastic member 7, so that the first sealing member 5 forms a gap 101 with the valve core 3, and the fluid of the fluid inlet end 10 can flow into the valve core cavity 30 of the valve core 3 through the gap 101. In the closed state of the control valve, since the spool chamber 30 is communicated with the fluid outlet port 20, fluid flows out of the fluid outlet port 20 through the spool chamber 30, and the purpose of pressure relief is achieved.
Of course, this embodiment is described based on the drawings only, it will be understood that the fluid inlet end may be disposed on the valve seat 2, and the fluid outlet end may be disposed on the valve body 1 correspondingly, so that the first sealing member 5 is disposed on one side of the valve seat 2, the first sealing member 5 is fixedly connected or limitedly connected with the valve seat 2, and the second sealing member 6 is disposed on one side of the valve body 1. At this time, one end of the elastic member 7 abuts against the valve body 1, and the other end abuts against the second seal member 6.
In this embodiment, when the pressure difference between the fluid inlet end 10 and the fluid outlet end 20 is smaller than the set pressure in the closed state of the control valve, the first sealing member 5 abuts against the valve core 3, and when the pressure difference between the fluid inlet end 10 and the fluid outlet end 20 is larger than the set pressure, the valve core 3 can move towards the fluid outlet end 20 against the elastic force of the elastic member 7, and the fluid at the fluid inlet end 10 flows into the valve core cavity 30 through the gap between the first sealing member 5 and the valve core 3, so as to achieve the pressure relief purpose. Compared with the prior art that the ball valve and the one-way valve are respectively arranged on different pipelines, the control valve has a compact structure.
Specifically, as shown in fig. 2a, 2b, 3 and 4, the first seal member 5 is a first seal 51, the first seal 51 is substantially annular, and a protruding portion 52 is provided on an outer peripheral wall of the first seal 51. The valve body 1 includes a first stepped portion 13, a stepped wall of the first stepped portion 13 is provided with a groove portion 14, and the first stepped portion 13 is placed in the groove portion 14 to restrict the first packing 51 from being separated from the valve body 1. Of course, the first gasket 51 may be press-fitted to the step wall of the first step portion 13, or the first gasket 51 may be fixed to the first step portion 13 by glue adhesion, so long as the object of the present embodiment is achieved.
As shown in fig. 8a and 8b, the spool chamber 30 of the spool 3 in the present embodiment has a substantially T-shaped structure, and includes a communication channel 33 and a bypass flow path 34, wherein the communication channel 33 penetrates the spool 3 through the center of the spool 3, and the bypass flow path 34 communicates the outer surface of the spool 3 with the communication channel 33. In the control valve open state, the fluid inlet port 10 and the fluid outlet port 20 are communicated through the communication passage 33, and in the control valve closed state, the communication passage 33 is communicated with the fluid outlet port 20 through the bypass flow path 34.
Further, as shown in fig. 2a, 2b, 5, the valve seat 2 includes a second stepped portion 21 facing the valve element 3, the second stepped portion 21 being provided with a first annular groove 22, the opening of the first annular groove 22 facing the valve element 3. The second sealing member 6 is a second gasket 61, the second gasket 61 being substantially annular and comprising a second annular groove 62, the second annular groove 62 opening towards the fluid outlet end 20, one end of the resilient element 7 being located in the first annular groove 22 and the other end of the resilient element 7 being located in the second annular groove 62. In the closed state of the control valve, when the fluid pressure difference force between the fluid inlet end 10 and the fluid outlet end 20 is larger than the set force, the valve core 3 can move toward the fluid outlet end 20 against the elastic force of the elastic member 7, and in this process, the valve core 3 compresses the elastic member 7 through the second gasket 61 due to the abutment of the second gasket 61 with the valve core 3, and in this process, the outer peripheral wall of the second gasket 61 is in sliding engagement with the stepped wall 211 of the second stepped portion 21.
Of course, as shown in fig. 6, and in combination with fig. 5, the second sealing member 6' may be configured to include a second gasket 61' and a connecting member 63, and the second gasket 61' may be substantially annular. In this embodiment, one end of the connecting member 63 near the valve core 3 abuts against the second sealing pad 61', the other end of the connecting member 63 includes a second annular groove 62', the second annular groove 62 'is open toward the fluid outlet end 20, one end of the elastic member 7 is located in the first annular groove 22, and the other end of the elastic member 7 is located in the second annular groove 62'. When the fluid pressure difference force between the fluid inlet end 10 and the fluid outlet end 20 is larger than the set force in the valve closing state of the control valve, the valve core 3 can move towards the fluid outlet end 20 against the elastic force of the elastic member 7, and the connecting member 63 abuts against the second sealing pad 61' due to the abutting of the second sealing pad 61' against the valve core 3, and in the process, the outer peripheral wall of the connecting member 63 is in sliding fit with the stepped wall 211 of the second stepped portion 21, and the valve core 3 compresses the elastic member 7 through the second sealing member 6 '.
After the fluid pressure at the fluid inlet end 10 is released to the fluid outlet end 20, the elastic member 7 is reset, and the second sealing member 6 and the valve element 3 are pushed to move toward the fluid inlet end 10 under the elastic force of the elastic member 7 until the valve element 3 abuts against the first sealing member 5.
Further, as shown in fig. 7, 8a and 8b, the first groove 31 of the valve element 3 has a substantially rectangular shape in horizontal projection, and the side wall thereof includes a substantially parallel first longitudinal side 311 and second longitudinal side 312. The shaft portion 41 of the valve stem 4 includes a third longitudinal side 411 and a fourth longitudinal side 412 that are generally parallel, the first longitudinal side 311 being in a snug or clearance fit with the third longitudinal side 411, the second longitudinal side 312 being in a snug or clearance fit with the fourth longitudinal side 412. In the control valve closed state, when the fluid pressure difference force of the fluid inlet port 10 and the fluid outlet port 20 is greater than the set force, the spool 3 is slidable toward the fluid outlet port 20 with respect to the valve stem 4.
As shown in fig. 2b, 8c and 9, in this embodiment, the control valve further includes a support member 9, and the inner bottom wall of the valve body 1 is provided with a mounting hole 12, and the mounting hole 12 is a circular counter bore, and the cross section of the mounting hole is circular. The valve body 3 includes a second groove portion 32, and the second groove portion 32 and the first groove portion 31 are disposed symmetrically with respect to the communication passage 33. As shown in fig. 8a, the first groove 31 is located at the upper end of the valve body 3, and the second groove 32 is located at the lower end of the valve body 3. The support 9 comprises a base 92 extending at least partially into the mounting hole 12 and a mating section 91 extending at least partially into the second slot portion 32. Specifically, the side wall of the second slot portion 32 includes a fifth longitudinal side 321 and a sixth longitudinal side 322; the mating segment 91 is generally rectangular in horizontal projection with side walls including a seventh longitudinal side 911 and an eighth longitudinal side 912 that are generally parallel. The fifth longitudinal side 321 is a snug or clearance fit with the seventh longitudinal side 911 and the sixth longitudinal side 322 is a snug or clearance fit with the eighth longitudinal side 912. The cross section of the base 92 of the supporting member 9 is circular, and the peripheral wall of the base 92 is in a rotary fit with the hole wall 121 of the mounting hole 12. In the closed state of the control valve, when the fluid pressure difference between the fluid inlet end 10 and the fluid outlet end 20 is greater than the set force, the valve element 3 can slide in the direction of the fluid outlet end 20 relative to the valve rod 4 and the support 9.
Of course, in order to increase the smoothness of the sliding of the valve core 3 with respect to the valve stem 4 and the support 9 in the direction of the fluid outlet end 20 or the fluid inlet end 10, further, the groove bottom of the first groove portion 31 is provided in a flat bottom structure, and the groove bottom of the second groove portion 32 is provided in a flat bottom structure.
By means of the pressure difference force between the fluid inlet end 10 and the fluid outlet end 20 of the control valve, when the pressure difference force is larger than the set force, the valve core 3 overcomes the elastic force of the elastic piece 7 to slide towards the fluid outlet end 20, and the purpose of pressure relief is achieved. The control valve of the embodiment integrates the function of the one-way valve in the background technology, and has compact structure; compared with the background technology, the embodiment reduces the welding point connected with the pipeline piece, and can reduce the leakage risk of the control valve.
FIG. 10 is a valve closing state diagram of another control valve according to the present invention; FIG. 11 is a schematic illustration of the valve stem of FIG. 10; FIG. 12a is a schematic cross-sectional view of the valve cartridge of FIG. 10; fig. 12b is a schematic structural view of the valve core in fig. 10.
The difference between this embodiment and the above-mentioned embodiment is the structure and connection matching manner of the valve rod and the valve core. As shown in fig. 10, 11, 12a and 12 b. In this embodiment, the first groove portion 31' of the spool 3' includes a third stepped portion 313 having a stepped surface facing the spool chamber 30, and the side wall of the first groove portion 31' includes a first longitudinal side 311' and a second longitudinal side 312' that are substantially parallel. The side wall of the shaft portion 41' includes third and fourth substantially parallel longitudinal sides 411', 412', the shaft portion 41' of the valve stem 4' includes a flange portion 413 extending radially outwardly from the third and fourth longitudinal sides 411', 412', the first longitudinal side 311' being a snug or clearance fit with the third longitudinal side 411', the second longitudinal side 312' being a snug or clearance fit with the fourth longitudinal side 412 '. The upper end surface of the flange 413 abuts against the stepped surface of the third stepped portion 313 to restrict the spool 3 'from axially coming off the valve stem 4'. In the control valve closed state, when the fluid pressure difference force of the fluid inlet port 10 and the fluid outlet port 20 is greater than the set force, the spool 3 'can slide in the direction of the fluid outlet port 20 with respect to the valve stem 4'. The present embodiment has the same technical effects as the above embodiment, and a description thereof will not be repeated here.
The "setting force" in each of the above embodiments is designed according to the specification parameters required by the control valve in the system, and specific influencing factors thereof include: the elastic force of the elastic member 7, the friction force of the sliding engagement of the outer peripheral wall of the second gasket 61 with the step wall 211 of the second step portion 21, or the friction force of the sliding engagement of the outer peripheral wall of the connecting member 63 with the step wall 211 of the second step portion 21, the resistance of the fluid inside the control valve, the viscosity of the fluid, and the like.
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (9)
1. The control valve comprises a valve body, a valve seat, a valve core, a valve rod, a first sealing part and a second sealing part, wherein the valve body is fixedly connected with the valve seat, the valve core is arranged in a valve cavity of the control valve, the valve core comprises a valve core cavity, the valve core cavity can be communicated with a fluid inlet end and a fluid outlet end, the valve rod can drive the valve core to circumferentially rotate,
The first sealing component is positioned on one side of the valve core, which is close to the fluid inlet end, the second sealing component is positioned on one side of the valve core, which is close to the fluid outlet end, the second sealing component is abutted against the valve core, the control valve further comprises an elastic piece, one end of the elastic piece is abutted against the valve body or the valve seat, the other end of the elastic piece is abutted against the second sealing component, the control valve is in a valve closing state, when the pressure difference force between the fluid inlet end and the fluid outlet end is smaller than a set force, the first sealing component is abutted against the valve core, the valve core cavity is communicated with the fluid outlet end of the control valve, the valve core cavity is not communicated with the fluid inlet end of the control valve, and when the pressure difference force between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can overcome the elastic force of the elastic piece to move towards the fluid outlet end, and fluid at the fluid inlet end flows into the valve core cavity through the gap between the first sealing component and the valve core.
2. The control valve of claim 1, wherein the fluid inlet end is disposed on the valve body, the fluid outlet end is disposed on the valve seat, the first sealing member is fixedly or limitedly connected to the valve body, one end of the elastic member abuts against the valve seat, and the other end of the elastic member abuts against the second sealing member.
3. The control valve of claim 1, wherein the spool includes a first slot portion having a sidewall including parallel first and second longitudinal sides, the valve stem includes a shaft portion mated with the first slot portion, the sidewall of the shaft portion includes parallel third and fourth longitudinal sides, the first longitudinal side is mated or clearance mated with the third longitudinal side, the second longitudinal side is mated or clearance mated with the fourth longitudinal side, and the spool is slidable relative to the valve stem toward the fluid outlet port when the differential pressure force of the fluid inlet port and the fluid outlet port is greater than the set force in the closed state of the control valve.
4. The control valve of claim 3, further comprising a support member, the valve body having a mounting hole, the support member comprising a mating segment and a base, the mating segment extending at least partially into the second groove of the valve spool, the base extending at least partially into the mounting hole, the base having a circular cross-section, the mounting hole having a circular cross-section, the base being rotatable relative to the valve body.
5. The control valve of claim 4, wherein the sidewall of the second slot portion includes parallel fifth and sixth longitudinal sides, the sidewall of the upper portion of the support includes parallel seventh and eighth longitudinal sides, the fifth longitudinal side is a snug or clearance fit with the seventh longitudinal side, and the sixth longitudinal side is a snug or clearance fit with the eighth longitudinal side; in the valve closing state of the control valve, when the pressure difference force between the fluid inlet end and the fluid outlet end is larger than the set force, the valve core can slide towards the fluid outlet end relative to the supporting piece.
6. A control valve according to claim 3, wherein the first groove portion includes a third stepped portion having a stepped surface facing the spool bore, the side wall of the first groove portion includes parallel first and second longitudinal sides, the valve stem includes a shaft portion engaging the first groove portion, the side wall of the shaft portion includes parallel third and fourth longitudinal sides, the shaft portion includes a flange portion extending radially outwardly from the third and fourth longitudinal sides, the first longitudinal side engages or is in clearance engagement with the third longitudinal side, the second longitudinal side engages or is in clearance engagement with the fourth longitudinal side, and an upper end surface of the flange portion engages the stepped surface of the third stepped portion to limit axial disengagement of the valve stem from the spool, the control valve being slidable relative to the valve stem toward the fluid outlet end in the valve closed state.
7. The control valve according to any one of claims 1 to 6, wherein the first seal member includes a first gasket having a ring shape, a peripheral wall of the first gasket is provided with a boss portion, the valve body includes a first stepped portion, a stepped wall of the first stepped portion is provided with a groove portion, and the boss portion is disposed in the groove portion.
8. The control valve of any of claims 1-6, wherein the valve seat includes a second land facing the valve spool, the second land including a first annular groove, an opening of the first annular groove facing the valve spool, the second seal member including a second seal ring, the second seal ring including a second annular groove, an opening of the second annular groove facing the fluid outlet end, one end of the resilient member being located in the first annular groove, the other end of the resilient member being located in the second annular groove, a peripheral wall of the second seal ring slidably engaging a land wall of the second land.
9. The control valve of any of claims 1-6, wherein the valve seat includes a second land facing the valve spool, the second land including a first annular groove, an opening of the first annular groove facing the valve spool, the second sealing member including a connector and a second gasket, the second gasket being annular, an end of the connector adjacent the valve spool abutting the second gasket, the other end of the connector including a second annular groove, an opening of the second annular groove facing the fluid outlet end, an end of the resilient member being located in the first annular groove, the other end of the resilient member being located in the second annular groove, an outer peripheral wall of the connector slidably engaging a land wall of the second land.
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| CN201910870052.7A CN112503203B (en) | 2019-09-16 | 2019-09-16 | Control valve |
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| CN201910870052.7A CN112503203B (en) | 2019-09-16 | 2019-09-16 | Control valve |
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| CN112503203A CN112503203A (en) | 2021-03-16 |
| CN112503203B true CN112503203B (en) | 2024-04-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117917519A (en) * | 2022-10-21 | 2024-04-23 | 浙江三花商用制冷有限公司 | Control valve |
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Effective date of registration: 20220822 Address after: 312500 Daming new area, Zhejiang Xinchang Economic Development Zone, Xinchang County, Shaoxing City, Zhejiang Province Applicant after: Zhejiang Sanhua Commercial Refrigeration Co.,Ltd. Address before: 312500 R & D building of Zhejiang Sanhua refrigeration group, xialiquan village, Qixing street, Xinchang County, Shaoxing City, Zhejiang Province Applicant before: ZHEJIANG SANHUA CLIMATE AND APPLIANCE CONTROLS GROUP Co.,Ltd. |
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