CN116717517A - Plug-in low-noise throttle valve - Google Patents

Plug-in low-noise throttle valve Download PDF

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Publication number
CN116717517A
CN116717517A CN202310558521.8A CN202310558521A CN116717517A CN 116717517 A CN116717517 A CN 116717517A CN 202310558521 A CN202310558521 A CN 202310558521A CN 116717517 A CN116717517 A CN 116717517A
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CN
China
Prior art keywords
valve
sleeve
cavity
valve sleeve
valve core
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN202310558521.8A
Other languages
Chinese (zh)
Inventor
苏嵩
杜明燕
王晓伟
温茜
高敬成
李晓涛
史俊强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Research Institute of Auotomation for Machinery Industry Co Ltd
Original Assignee
Beijing Research Institute of Auotomation for Machinery Industry Co Ltd
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
Application filed by Beijing Research Institute of Auotomation for Machinery Industry Co Ltd filed Critical Beijing Research Institute of Auotomation for Machinery Industry Co Ltd
Priority to CN202310558521.8A priority Critical patent/CN116717517A/en
Publication of CN116717517A publication Critical patent/CN116717517A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/008—Reduction of noise or vibration
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K47/00—Means in valves for absorbing fluid energy
    • F16K47/02—Means in valves for absorbing fluid energy for preventing water-hammer or noise
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B2013/002—Modular valves, i.e. consisting of an assembly of interchangeable components
    • F15B2013/004—Cartridge valves
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Details Of Valves (AREA)
  • Lift Valve (AREA)

Abstract

A cartridge-type low noise throttle valve comprising: the valve seat is internally provided with a through valve seat cavity; the valve core is arranged in the valve seat cavity and is coaxially arranged with the valve seat cavity, and the valve core is respectively provided with a closing position and a plurality of flow adjusting positions relative to the valve seat along the axial direction; the inner valve sleeve is sleeved outside the valve core, and one end of the inner valve sleeve is connected with one end of the valve body; the other end of the mold is provided with a first cavity; the first cavity is matched with the first-end stepped shaft of the valve core and forms a plurality of stages of throttling grooves together, and the multistage throttling grooves correspond to a plurality of flow adjusting positions respectively; a second cavity is formed between the inner wall of the inner valve sleeve and the valve core; the side wall of the inner valve sleeve is provided with a penetrating inner orifice; an outer valve sleeve sleeved on the inner valve sleeve, one end of which is connected with one end of the valve body; the side wall of the valve body is provided with a through outer orifice corresponding to the inner orifice; a third cavity is formed between the outer wall of the inner valve sleeve and the inner wall of the outer valve sleeve; and one end of the adjusting handle is connected with the other end of the valve body, and the other end of the adjusting handle is connected with the other end of the valve core.

Description

Plug-in low-noise throttle valve
Technical Field
The invention relates to a hydraulic transmission technology, in particular to a plug-in type low-noise throttle valve for flow control.
Background
The throttle valve is an important control element in the hydraulic transmission system and mainly plays roles of system flow regulation and actuator operation speed control. In the flow regulation process, the fluid flow state can change along with the change of the opening of the throttle valve, when the throttle valve is opened, the fluid flows through the valve port and the internal flow passage of the valve, the flow speed is suddenly changed, the cavitation degree is improved, turbulence noise and cavitation noise are generated, the noise problem seriously affects the physical and mental health of on-site staff, and the flow field change also reduces the reliability of the hydraulic system. Aiming at the increasingly serious noise problem caused by the development of hydraulic transmission to high speed, high pressure and high power, the throttle valve structure is necessary to be improved, and the fluid vibration and noise induced by the exciting flow field in the internal flow channel are reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing the plug-in type low-noise throttle valve aiming at the defects in the prior art.
In order to achieve the above object, the present invention provides a plug-in low noise throttle valve, comprising:
the valve seat comprises a valve body, and a through valve seat cavity is arranged in the valve body;
the valve core is arranged in the valve seat cavity and is coaxially arranged with the valve seat cavity, and the valve core is respectively provided with a closing position and a plurality of flow adjusting positions relative to the valve body along the axial direction;
the inner valve sleeve is sleeved outside the valve core, and one end of the inner valve sleeve is connected with one end of the valve body; the other end of the inner valve sleeve is provided with a first cavity which is of a stepped hole structure; the first cavity is matched with the first-end stepped shaft of the valve core, and the first cavity and the first-end stepped shaft of the valve core form a multi-stage throttling groove together, and the multi-stage throttling groove corresponds to a plurality of flow adjusting positions respectively; a second cavity is formed between the inner wall of the inner valve sleeve and the valve core; the side wall of the inner valve sleeve is provided with a penetrating inner orifice;
the outer valve sleeve is sleeved on the inner valve sleeve, and one end of the outer valve sleeve is connected with one end of the valve body; the side wall of the outer valve sleeve is provided with a penetrating outer orifice corresponding to the inner orifice; a third cavity is formed between the outer wall of the inner valve sleeve and the inner wall of the outer valve sleeve; and
one end of the adjusting handle is connected with the other end of the valve body, and the other end of the adjusting handle is connected with the other end of the valve core.
In the plug-in type low-noise throttle valve, the longitudinal section of the top of the head end of the valve core is parabolic, a parabolic valve plug is formed, and the relative flow change caused by the change of the unit displacement of the valve core is in direct proportion to the square root of the relative flow value of the top of the head end.
According to the plug-in type low-noise throttle valve, the first-end stepped shaft of the valve core is a variable-diameter stepped shaft, and different variable-diameter stepped shafts and corresponding stepped holes jointly form three-stage throttling grooves so as to achieve flow fine adjustment.
The plug-in type low-noise throttle valve is characterized in that a threaded structure is arranged on the outer surface of one end of the inner valve sleeve, and the inner valve sleeve is connected with the valve body through the threaded structure.
The plug-in type low-noise throttle valve is characterized in that a step is arranged on the outer surface of the other end of the inner valve sleeve and used for fixing the outer valve sleeve and being matched with the outer valve sleeve to be integrally installed or taken out.
In the plug-in type low-noise throttle valve, the ratio of the length to the diameter of the inner throttle hole is 0.5-4, and the flow rate flowing through the inner throttle hole is in direct proportion to the evolution of the pressure difference.
The plug-in type low-noise throttle valve, wherein the number of the outer throttle holes is larger than or equal to that of the inner throttle holes; and when the inner orifice is equal to the number of the outer orifices, the diameter of the outer orifice is more than or equal to 1.2 times of the diameter of the inner orifice.
The plug-in type low-noise throttle valve is characterized in that one end of the valve seat is provided with a first internal thread and an external thread respectively, the first internal thread is used for being connected with the internal valve sleeve, and the external thread is used for being connected with an external valve block; the other end of the valve seat is provided with a second internal thread and an annular groove, and the second internal thread is used for being connected with the valve core; the annular groove is used for being connected with the adjusting handle.
The plug-in type low-noise throttle valve is characterized in that one end of the handle body of the adjusting handle is provided with a set screw hole and a groove pin hole which are matched with the annular groove, and the set screw hole and the groove pin hole are connected with the annular groove through the set screw and the round-head groove pin; the other end of the handle body is provided with a through hole coaxial with the valve body, an inner hexagonal hole is formed in the handle body and is adjacent to the through hole, and an outer hexagonal shaft matched with the inner hexagonal hole is correspondingly arranged on the valve core; the tail end of the valve core is provided with an opening indication groove which is used for indicating the flow regulating positions.
The plug-in type low-noise throttle valve is characterized in that a valve core sealing groove is formed in the valve core, and the valve core sealing groove is located at the position where the valve core is matched with the valve body; a valve seat sealing groove is formed in one end face of the valve body; and an inner valve sleeve sealing groove is formed in the outer wall of the other end of the inner valve sleeve.
The invention has the technical effects that:
the invention has good flow regulation performance, easy regulation of flow coefficient and small regulation moment, and experiments prove that the fluid noise can be well reduced by arranging the inner valve sleeve, the outer valve sleeve and the orifice. The valve core stepped shaft and the inner valve sleeve stepped hole form a first cavity, the valve core and the left side of the inner valve sleeve form a second cavity, the inner valve sleeve and the outer valve sleeve form a third cavity, the first cavity can play a good sealing role, the area change gradient of the first cavity is small, and the flow fine adjustment performance is good; the second cavity can play a good role in throttling and depressurization, so that fluid is converged and injected through the throttling holes, and the pressure energy of the fluid is converted into kinetic energy for subsequent consumption; the third cavity can enable high-speed jet flows to collide with each other, so that kinetic energy is converted into heat energy, the flow speed of fluid is reduced, and accordingly fluid noise is reduced.
The invention will now be described in more detail with reference to the drawings and specific examples, which are not intended to limit the invention thereto.
Drawings
In order to more clearly describe the technical scheme of the invention, the scheme description related to the invention and the drawings required in the embodiments are introduced. It is obvious that the following drawings are only examples of the present invention, and that other drawings can be obtained from the drawings provided by the present invention without the inventive effort of any person skilled in the art.
FIG. 1 is a cross-sectional view of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a valve core according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an inner valve sleeve according to one embodiment of the present invention;
FIG. 4 is a cross-sectional view of an outer valve sleeve according to one embodiment of the present invention;
FIG. 5 is a cross-sectional view of a valve seat according to an embodiment of the present invention.
Wherein reference numerals are used to refer to
1 valve core
11 valve plug
12 spool step
13 valve core sealing conical surface
14 valve core external screw thread
15 outer hexagonal shaft
16 spool optical axis
17 case seal groove
18-opening indication groove
19 valve core sealing ring
10 case stop ring
2 internal valve sleeve
21 inner orifice
22 first step
23 second step
24 third step
25 internal valve sleeve external screw thread
26 outer step
27 inner valve sleeve seal groove
28 inner valve sleeve baffle ring
29 inner valve sleeve sealing ring
3 outer valve sleeve
31 outer orifice
32 outer valve pocket step
4 valve seat
41 valve body
42 valve seat cavity
43 external screw thread
44 valve seat step hole
45 first internal thread
46 second internal thread
47 annular groove
48 valve seat sealing ring
49 seal groove of valve seat
5 adjusting handle
51 handle body
52 inner hexagonal hole
53 round-head grooved pin
54 set screw
6 first cavity
7 second cavity
8 third cavity
Detailed Description
The following description of the embodiments of the present invention will be made fully and clearly with reference to the accompanying drawings, in which embodiments of the invention are shown, and in which embodiments of the invention are shown, by way of illustration only, and not all embodiments of the invention. All other embodiments obtained by the person skilled in the art based on the present invention without any inventive effort fall within the scope of protection of the present invention.
It should be noted that, when the terms of "left", "right" and the like are used herein, reference is made to the drawings provided by the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, fig. 1 is a cross-sectional view of an embodiment of the present invention. The invention is mainly used in ships or other hydraulic transmission systems with higher requirements on noise, is used for throttling and speed regulation, and provides good vibration and noise reduction effects. The plug-in low noise throttle valve comprises: the valve seat 4 comprises a valve body 41, and a through valve seat cavity 42 is arranged in the valve body 41; a valve element 1 installed in the valve seat chamber 42 and coaxially disposed with the valve seat chamber 42, the valve element 1 having a closed position and a plurality of flow rate adjustment positions with respect to the valve body 41 in an axial direction, respectively; an inner valve sleeve 2 sleeved outside the valve core 1, wherein one end of the inner valve sleeve 2 is connected with one end of the valve body 41; the other end of the inner valve sleeve 2 is provided with a first cavity 6, and the first cavity 6 is preferably of a stepped hole structure; the first cavity 6 is matched with the stepped shaft at the head end of the valve core 1, and forms a plurality of stages of throttling grooves together, and the multistage throttling grooves correspond to a plurality of flow adjusting positions respectively; a second cavity 7 is formed between the inner wall of the inner valve sleeve 2 and the valve core 1; the side wall of the inner valve sleeve 2 is provided with a penetrating inner orifice 21; an outer valve sleeve 3 sleeved on the inner valve sleeve 2, wherein one end of the outer valve sleeve 3 is connected with one end of the valve body 41 and is in combined action with a step arranged on the outer surface of the other end of the inner valve sleeve 2 to fix the outer valve sleeve 3; an outer orifice 31 penetrating through the side wall of the outer valve housing 3 is provided corresponding to the inner orifice 21; a third cavity 8 is formed between the outer wall of the inner valve sleeve 2 and the inner wall of the outer valve sleeve 3; and an adjusting handle 5, one end of which is connected with the other end of the valve body 41, and the other end of the adjusting handle 5 is connected with the other end of the valve core 1. A first cavity 6 is formed between the stepped shaft of the valve core 1 and the stepped hole of the inner valve sleeve 2, a second cavity 7 is formed between the valve core optical axis 16 and the inner valve sleeve 2, a third cavity 8 is formed between the inner valve sleeve 2 and the outer valve sleeve 3, the first cavity 6 can play a good sealing role, the area change gradient of the first cavity 6 is small, and the flow fine adjustment performance is good; the second cavity 7 can play a good role in throttling and depressurization, so that fluid is converged and injected through the throttling holes, and the pressure energy of the fluid is converted into kinetic energy for subsequent consumption; the third cavity 8 can enable high-speed jets to collide with each other, so that kinetic energy is converted into heat energy, the flow speed of fluid is reduced, and accordingly, the fluid noise is reduced.
The valve core 1 is provided with a valve core sealing groove 17, and the valve core sealing groove 17 is positioned at the position where the valve core 1 is matched with the valve body 41; a valve seat sealing groove 49 is arranged on one end face of the valve body 41; an inner valve sleeve sealing groove 27 is arranged on the outer wall of the other end of the inner valve sleeve 2. That is, an inner valve sleeve seal groove 27 is provided on the outer surface of the right end of the inner valve sleeve 2, for mounting an inner valve sleeve stopper ring 28 and an inner valve sleeve seal ring 29 to prevent leakage of oil in a valve block or other elements when the throttle valve is not opened, a valve seat seal groove 49 is provided on the valve seat 4, a valve seat seal ring 48 is mounted to prevent leakage of oil flowing out through the outer orifice 31 of the outer valve sleeve 3, a valve element seal groove 17 is provided on the valve element 1, and a valve element seal ring 19 and a valve element stopper ring 10 are mounted to prevent leakage of oil in the second cavity 7 through a gap between the valve element 1 and the valve seat 4.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a valve core 1 according to an embodiment of the present invention. In this embodiment, the longitudinal section of the top of the head end of the valve core 1 is parabolic, so as to form a parabolic valve plug 11, and the relative flow change caused by the change of the unit displacement of the valve core 1 is proportional to the square root of the relative flow value of the top of the head end. The head end stepped shaft of the valve core 1 is a variable-diameter stepped shaft, and different variable-diameter stepped shafts and corresponding stepped holes jointly form three-stage throttling grooves so as to realize flow fine adjustment.
As can be seen from fig. 2, the right end of the valve core 1 in this embodiment is provided with a valve core sealing conical surface 13, which cooperates with the third step 24 of the inner valve sleeve 2, so that the throttle valve has a good sealing effect in the closed state. When the valve core 1 is tightly attached to the third step 24, the throttle valve is in a closed state, when the valve core 1 moves leftwards, the throttle valve can be opened, at the moment, the oil in the first cavity 6 can flow to the second cavity 7 and the inner throttle hole 21 between the valve core 1 and the inner valve sleeve 2, and the opening indication groove 18 is arranged at the left end of the valve core 1, so that the movement displacement condition of the valve core 1 can be clearly observed. The oil entering the first cavity 6 flows through the inner orifice 21 to the third cavity 8 and through the outer orifice 31 of the outer valve sleeve 3 to the return line of the hydraulic transmission system.
The left part of the valve core 1 of the embodiment is provided with an outer hexagonal shaft 15, and is matched with an inner hexagonal hole 52 of the adjusting handle 5 to transmit torque so that the second inner thread 46 and the valve core outer thread 14 generate relative motion, the left end of the valve seat 4 is provided with an annular groove 47, the right end of the adjusting handle 5 is provided with a groove pin hole and a set screw hole, and is matched with a round head groove pin 53 and a set screw 54 to be connected with the annular groove 47, the round head groove pin 53 ensures that the adjusting handle 5 does not fall off in the rotating process, and the set screw 54 can ensure that the valve core 1 is stable and does not move under certain working conditions. The right end of the valve core 1 is provided with a parabolic valve plug 11, and the structure avoids the rapid increase of the fluid flow rate, reduces the stress area and ensures that the manual adjustment is more convenient. The left end of the valve core 1 is in a stepped shaft structure, the right end of the inner valve sleeve 2 is in a stepped hole structure, and when the valve core 1 moves leftwards to open the throttle valve, a valve plug 11, a valve core step 12 and a valve core sealing conical surface 13 on the valve core 1 form a throttle groove with a first step 22, a second step 23 and a third step 24 on the inner valve sleeve 2, so that the throttle valve has flow fine adjustment and anti-blocking functions.
Referring to fig. 3 and 4, fig. 3 is a cross-sectional view of an inner valve housing 2 according to an embodiment of the present invention, and fig. 4 is a cross-sectional view of an outer valve housing 3 according to an embodiment of the present invention. The outer surface of one end of the inner valve sleeve 2 in this embodiment is provided with a screw structure, and the inner valve sleeve 2 is connected with the valve body 41 through the screw structure. The outer surface of the other end of the inner valve sleeve 2 is provided with a step for being matched with the outer valve sleeve 3 to be integrally taken out at one time. Wherein, the ratio of the length to the diameter of the inner orifice 21 is 0.5-4, the flow rate flowing through the inner orifice 21 is in direct proportion to the pressure difference, and the phenomenon of shrinkage caused by the aggregation of fluid to the orifice and the abrupt streamline change due to the excessively small length-to-diameter ratio is avoided. To ensure that the two layers of valve sleeves have similar through-flow effects when the valve sleeves are arranged in a single layer or not, the number of the outer orifices 31 is more than or equal to that of the inner orifices 21; when the number of the inner orifices 21 is equal to the number of the outer orifices 31, the diameter of the outer orifice 31 is 1.2 times or more the diameter of the inner orifice 21. When the flow coefficient of the throttle valve needs to be increased to a small extent, the aperture of the outer throttle hole 31 can be increased, and when the flow coefficient needs to be increased to a large extent, the inner throttle hole 21 and the outer throttle hole 31 can be increased in the same proportion.
That is, through holes, that is, the inner orifice 21 and the outer orifice 31, are formed on the surfaces of the inner valve housing 2 and the outer valve housing 3 in the embodiment, so that the oil flowing into the first cavity 6 can reach the function of converging injection through orifice throttling, and kinetic energy is converted into heat energy through mutual collision of high-speed oil, thereby achieving the purpose of reducing fluid noise. The left end of the inner valve sleeve 2 is provided with the inner valve sleeve external thread 25 which can be matched with the first internal thread 45 so as to ensure that the inner valve sleeve 2 can be taken out together when the valve seat 4 is disassembled, and avoid the inner valve sleeve 2 from being blocked in an external flow channel and being difficult to take out. Meanwhile, in order to ensure that the outer valve sleeve 3 is also convenient to take out, the top of the inner valve sleeve 2 is provided with an outer step 26, the right end of the valve seat 4 is provided with a valve seat step hole 44, when in installation, the left end of the outer valve sleeve 3 is matched with the outer step 26, or the outer valve sleeve step 32 of the outer valve sleeve 3 is inserted into the valve seat step hole 44, and then the inner valve sleeve 2 is screwed into the valve seat 4, so that the valve seat 4, the inner valve sleeve 2 and the outer valve sleeve 3 are connected into an integral structure.
Referring to fig. 5, fig. 5 is a cross-sectional view of a valve seat 4 according to an embodiment of the present invention. One end of the valve seat 4 in the embodiment is respectively provided with a first internal thread 45 and an external thread, the first internal thread 45 is used for being connected with the inner valve sleeve 2, and the external thread is used for being connected with an external valve block; the other end of the valve seat 4 is provided with a second internal thread 46 and an annular groove 47, and the second internal thread 46 is used for being connected with the valve core 1; the annular recess 47 is adapted to a set screw hole and a slotted pin hole provided on the adjustment handle 5 for connection with the adjustment handle 5. The valve body 41 is provided with a valve seat cavity 42 penetrating through two axial ends, and can be used for installing the valve core 1, the valve core 1 can reciprocate in the valve seat cavity 42, and meanwhile, the external thread of the valve seat 4 can enable the plug-in type low-noise throttle valve to be integrally arranged on other elements such as a valve block. The valve seat cavity 42 is arranged to be slightly smaller at the left end and slightly larger at the right end, and the slightly larger end is used for installing the inner valve sleeve 2, so that when the throttle valve is arranged on a valve block or other elements, the throttle valve can be pressed through the external threads 43 of the valve seat 4 to play a role in sealing and fastening. The slightly smaller left end is used for allowing the valve core 1 to pass through, and is provided with a second internal thread 46 which is matched with the valve core external thread 14 so that the valve core 1 can move left and right.
One end of the handle body 51 of the adjusting handle 5 of the embodiment is provided with a set screw hole and a slot pin hole which are matched with the annular groove 47, and is connected with the annular groove 47 through a set screw 54 and a round-head slot pin 53; the other end of the handle body 51 is provided with a through hole coaxial with the valve body 41, an inner hexagonal hole 52 is arranged in the handle body 51 and is adjacent to the through hole, and the valve core 1 is correspondingly provided with an outer hexagonal shaft 15 matched with the inner hexagonal hole 52; the tail end of the valve core 1 is provided with an opening indication groove 18, and the opening indication groove 18 is used for indicating the plurality of flow adjustment positions.
The invention has convenient flow and flow coefficient adjustment, can ensure zero leakage, has good vibration noise control effect on the premise of ensuring the normal function of the throttle valve due to the adoption of the small-hole throttle and throttle groove structure through experimental comparison, has wider application range, and can be used in various hydraulic equipment in industries such as ships, walking machinery and the like.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A cartridge-type low noise throttle valve, comprising:
the valve seat comprises a valve body, and a through valve seat cavity is arranged in the valve body;
the valve core is arranged in the valve seat cavity and is coaxially arranged with the valve seat cavity, and the valve core is respectively provided with a closing position and a plurality of flow adjusting positions relative to the valve body along the axial direction;
the inner valve sleeve is sleeved outside the valve core, and one end of the inner valve sleeve is connected with one end of the valve body; the other end of the inner valve sleeve is provided with a first cavity which is of a stepped hole structure; the first cavity is matched with the first-end stepped shaft of the valve core, and the first cavity and the first-end stepped shaft of the valve core form a multi-stage throttling groove together, and the multi-stage throttling groove corresponds to a plurality of flow adjusting positions respectively; a second cavity is formed between the inner wall of the inner valve sleeve and the valve core; the side wall of the inner valve sleeve is provided with a penetrating inner orifice;
the outer valve sleeve is sleeved on the inner valve sleeve, and one end of the outer valve sleeve is connected with one end of the valve body; the side wall of the outer valve sleeve is provided with a penetrating outer orifice corresponding to the inner orifice; a third cavity is formed between the outer wall of the inner valve sleeve and the inner wall of the outer valve sleeve; and
one end of the adjusting handle is connected with the other end of the valve body, and the other end of the adjusting handle is connected with the other end of the valve core.
2. The plug-in low noise throttle valve of claim 1, wherein the longitudinal cross-section of the head-end top of the spool is parabolic, forming a parabolic spool, the change in relative flow caused by the change in unit displacement of the spool being proportional to the square root of the relative flow value of the head-end top.
3. The plug-in low noise throttle valve according to claim 1 or 2, wherein the head end stepped shaft of the valve core is a variable diameter stepped shaft, and different variable diameter stepped shafts and corresponding stepped holes form three stages of throttle grooves together to realize flow fine adjustment.
4. The plug-in low noise throttle valve according to claim 1 or 2, wherein an outer surface of one end of the inner valve sleeve is provided with a screw structure, and the inner valve sleeve is connected with the valve body through the screw structure.
5. A plug-in low noise throttle valve according to claim 1 or 2, wherein the other end of the inner valve sleeve is provided with a step on its outer surface for securing the outer valve sleeve and for co-operation with the outer valve sleeve for integral installation or removal.
6. The plug-in low noise throttle valve according to claim 1 or 2, wherein the ratio of the length to the diameter of the inner throttle hole is 0.5 to 4, and the flow rate through the inner throttle hole is proportional to the evolution of the pressure difference.
7. The plug-in low noise throttle valve according to claim 1 or 2, wherein the number of the outer throttle holes is equal to or greater than the inner throttle hole; and when the inner orifice is equal to the number of the outer orifices, the diameter of the outer orifice is more than or equal to 1.2 times of the diameter of the inner orifice.
8. The plug-in low noise throttle valve according to claim 1 or 2, wherein one end of the valve seat is provided with a first internal thread and an external thread, respectively, the first internal thread being for connection with the inner valve sleeve and the external thread being for connection with an external valve block; the other end of the valve seat is provided with a second internal thread and an annular groove, and the second internal thread is used for being connected with the valve core; the annular groove is used for being connected with the adjusting handle.
9. The plug-in low noise throttle valve of claim 8, wherein one end of the shank of the adjustment handle is provided with a set screw hole and a slot pin hole which are matched with the annular groove, and is connected with the annular groove through the set screw and a round head slot pin; the other end of the handle body is provided with a through hole coaxial with the valve body, an inner hexagonal hole is formed in the handle body and is adjacent to the through hole, and an outer hexagonal shaft matched with the inner hexagonal hole is correspondingly arranged on the valve core; the tail end of the valve core is provided with an opening indication groove which is used for indicating the flow regulating positions.
10. The plug-in low noise throttle valve according to claim 1 or 2, wherein a valve core sealing groove is arranged on the valve core, and the valve core sealing groove is positioned at a position where the valve core is matched with the valve body; a valve seat sealing groove is formed in one end face of the valve body; and an inner valve sleeve sealing groove is formed in the outer wall of the other end of the inner valve sleeve.
CN202310558521.8A 2023-05-17 2023-05-17 Plug-in low-noise throttle valve Pending CN116717517A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202310558521.8A CN116717517A (en) 2023-05-17 2023-05-17 Plug-in low-noise throttle valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202310558521.8A CN116717517A (en) 2023-05-17 2023-05-17 Plug-in low-noise throttle valve

Publications (1)

Publication Number Publication Date
CN116717517A true CN116717517A (en) 2023-09-08

Family

ID=87865137

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202310558521.8A Pending CN116717517A (en) 2023-05-17 2023-05-17 Plug-in low-noise throttle valve

Country Status (1)

Country Link
CN (1) CN116717517A (en)

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