CN112096961A - Pressure-stabilizing pilot overflow valve - Google Patents

Pressure-stabilizing pilot overflow valve Download PDF

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Publication number
CN112096961A
CN112096961A CN202011014254.0A CN202011014254A CN112096961A CN 112096961 A CN112096961 A CN 112096961A CN 202011014254 A CN202011014254 A CN 202011014254A CN 112096961 A CN112096961 A CN 112096961A
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CN
China
Prior art keywords
valve
screw rod
adjusting screw
close
main valve
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
CN202011014254.0A
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Chinese (zh)
Inventor
韩智源
赵德建
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to CN202011014254.0A priority Critical patent/CN112096961A/en
Publication of CN112096961A publication Critical patent/CN112096961A/en
Pending legal-status Critical Current

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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
    • F16K49/00—Means in or on valves for heating or cooling
    • F16K49/002—Electric heating means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
    • B01D35/046—Plug, tap, or cock filters filtering elements mounted in or on a faucet the filtering element being mounted in the faucet plug
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/10—Cleaning by methods involving the use of tools characterised by the type of cleaning tool
    • B08B1/12—Brushes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B1/00—Cleaning by methods involving the use of tools
    • B08B1/20—Cleaning of moving articles, e.g. of moving webs or of objects on a conveyor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • F16K1/38—Valve members of conical shape
    • 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
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0433—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with vibration preventing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • 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
    • F16K31/44—Mechanical actuating means
    • F16K31/60—Handles
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Details Of Valves (AREA)

Abstract

The invention discloses a pressure-stabilizing pilot overflow valve which comprises a valve body, wherein a valve cover is fixedly installed at the upper end of the valve body through a bolt, an adjusting screw rod penetrates through one end of the valve cover, a hand wheel is fixedly installed at one end of the adjusting screw rod, a screw rod protection device is fixedly installed at the connecting position of the valve cover and the adjusting screw rod, the other end of the adjusting screw rod penetrates through the valve cover and is fixedly provided with a pressure regulating spring, a cone valve is fixedly installed at one end of the pressure regulating spring, a cone valve seat is arranged at the position, close to the cone valve, in the valve cover, and a main valve spring is arranged at the position, close. According to the invention, by arranging the screw rod protection device, under the condition that the adjusting screw rod is frozen, the connecting part of the adjusting screw rod and the connecting thread can be heated through the heating plate to melt the ice layer, so that the problem that the adjusting screw rod and the internal connecting thread are easily damaged to cause equipment damage when the adjusting screw rod is required to be adjusted by using a hand wheel is solved.

Description

Pressure-stabilizing pilot overflow valve
Technical Field
The invention relates to the technical field of valve equipment, in particular to a pressure-stabilizing pilot-operated overflow valve.
Background
The overflow valve is divided into direct overflow valve and pilot overflow valve, the direct overflow valve directly depends on hydraulic pressure and spring force to open and close the valve port, when the fluid pressure is higher, the spring rigidity is also higher, but when the spring rigidity is higher or the spring is thicker, its control performance is worse, so the direct overflow valve is only used in low pressure system with smaller flow, the pilot overflow valve is composed of main valve and pilot valve, when the hydraulic pressure is higher than the pressure regulating spring force of the pilot valve, the valve port is opened to form overflow loop, because the damping hole on the main valve acts to generate pressure drop, the upper and lower cavities of the main valve generate pressure difference, under the action of this pressure difference the main valve core overcomes the spring force of the main valve to open, so as to realize overflow, the pilot overflow valve can realize high pressure system with larger flow controlled by spring with smaller rigidity, and its control performance is better than the direct overflow valve, and thus is widely used in the field of fluid transmission control.
In the process of implementing the invention, the inventor finds that at least the following problems in the prior art are not solved: 1. when the overflow valve in the prior art is used in a cold outdoor environment in winter in the north, a hand wheel and an adjusting screw rod are frozen due to rain and snow weather, when the hand wheel is needed to adjust, connecting threads between the adjusting screw rod and the inside are easily damaged, so that equipment is damaged, meanwhile, a protection device is not arranged at the connecting position of the adjusting screw rod and a valve, an external threaded rod enters the valve during adjustment, and the external threaded rod is exposed in the air during use and can be polluted by dust; 2. in the working process of a hydraulic system, certain pollutants are inevitably generated due to abrasion of parts and can be mixed in hydraulic oil, when the hydraulic oil passes through the damping hole, the damping hole is overlarge, the pollutants enter a driving cavity of the main valve element through the damping hole to cause clamping stagnation of the main valve element or enter a valve seat of a pilot valve assembly to cause that the pilot valve element cannot be closed, the damping hole of the main valve element is too small and is easy to block, so that in the existing hydraulic element and hydraulic system, the failure fault rate of an overflow valve accounts for more than 50% of the total fault rate, the cleanliness of the hydraulic oil and the processing burr reduction are pursued at one step, and the system cost is undoubtedly greatly improved.
Therefore, a pressure stabilizing pilot type overflow valve is provided.
Disclosure of Invention
The invention aims to provide a pressure-stabilizing pilot-operated overflow valve, which can heat the joint of an adjusting screw and a connecting thread through a heating plate to melt an ice layer under the condition that the adjusting screw is frozen by arranging a screw rod protection device, so as to prevent the problem that the connecting thread between the adjusting screw and the inner part is easy to damage and equipment is damaged when the adjusting screw needs to be adjusted by a hand wheel, meanwhile, a cleaning mechanism is also arranged in the screw rod protection device, a connecting spring is used for extruding a hairbrush, when the adjusting screw advances spirally, the hairbrush can be used for cleaning dust and other impurity particles on the surface of the adjusting screw, so that the problems that the hydraulic oil in a valve is polluted, the damping hole is blocked to generate irregular pressure change, the pressure adjustment cannot be better carried out and the normal use of the overflow valve is influenced are solved, and by arranging a filtering device, when the hydraulic oil enters the, filter great impurity particle earlier through the filter screen, prevent that it from blockking up the damping hole, hydraulic oil can utilize the kuppe to turn to in the cushion chamber after passing through the filter layer, and then make less impurity particle in the hydraulic oil can carry out the deposit in the impurity hold up tank, when guaranteeing the best aperture of damping hole, can also reduce the overflow valve failure fault rate because of impurity arouses to solve the problem of proposing in the above-mentioned background art.
In order to achieve the purpose, the invention provides the following technical scheme: a pressure-stabilizing pilot overflow valve comprises a valve body, wherein a valve cover is fixedly installed at the upper end of the valve body through a bolt, an adjusting screw rod penetrates through one end of the valve cover, a hand wheel is fixedly installed at one end of the adjusting screw rod, a screw rod protection device is fixedly installed at the connecting position of the valve cover and the adjusting screw rod, the other end of the adjusting screw rod penetrates through the valve cover and is fixedly installed with a pressure adjusting spring, a cone valve is fixedly installed at one end of the pressure adjusting spring, a cone valve seat is arranged at the position close to the cone valve inside the valve cover, a main valve spring is arranged at the position close to the valve cover at the upper end inside the valve body, a main valve core is fixedly installed at the lower end of the main valve spring, a damping hole is formed inside the main valve core, a filtering device is arranged at the lower, an oil outlet is formed in the position, close to the lower part of the main valve seat, in the valve body, and an oil inlet is formed in the position, corresponding to the main valve seat, of the side surface of the valve body;
the screw rod protection device comprises an installation plate fixedly installed at one end of a valve cover through a bolt, a first barrel is fixedly installed at one side of the installation plate, a connecting spring is installed in the first barrel in an embedded mode on the inner circular surface, a limiting column is arranged at the connecting position of the connecting spring and the first barrel, a hairbrush is fixedly installed at the lower end of the connecting spring, a second barrel is fixedly installed at the other side of the installation plate, and a heating plate is arranged in the second barrel in an embedded mode;
the filtering device comprises a buffer cavity which is arranged inside the main valve core and close to the lower end of the damping hole, a filter screen is arranged at the middle position of the lower end of the buffer cavity, a guide cover is fixedly arranged at the position, close to the upper end of the filter screen, of the bottom end inside the buffer cavity, a flow channel is formed in the lower end of the guide cover, and an impurity storage tank is arranged at the position, close to one side of the filter screen, of the bottom end inside the.
When the overflow valve in the prior art is used in a cold outdoor environment in winter in the north, a hand wheel and an adjusting screw rod are frozen due to rain and snow weather, when the hand wheel is required to be adjusted, connecting threads between the adjusting screw rod and the inside are easily damaged, equipment is damaged, meanwhile, a protection device is not arranged at the connecting position of the adjusting screw rod and a valve, an external rod body can enter the valve during adjustment, an external threaded rod is exposed in the air during use and can be stained with dust, when the adjusting screw rod outside the valve enters the valve during adjustment, hydraulic oil in the valve can be polluted, a damping hole is easily blocked to generate irregular pressure change, pressure adjustment cannot be well carried out, and the normal use of the overflow valve is influenced, by arranging the screw rod protection device, under the condition that the adjusting screw rod is frozen, the connecting position of the adjusting screw rod and the connecting threads can be heated through a heating plate, the ice layer is melted, the problem that when the hand wheel is used for adjustment, connecting threads between the adjusting screw rod and the inner part are easy to damage, and equipment is damaged is solved, meanwhile, the screw rod protection device utilizes the connecting spring to extrude the hairbrush, when the adjusting screw rod advances spirally, dust and other impurity particles on the surface of the adjusting screw rod can be cleaned by the hairbrush, and the problems that hydraulic oil in a valve is polluted, the damping hole is blocked to generate irregular pressure change, pressure adjustment cannot be well carried out, and normal use of an overflow valve is influenced are avoided; in the working process of a hydraulic system, the abrasion of each part inevitably generates some pollutants which are mixed in hydraulic oil, when the hydraulic oil passes through the damping hole, the damping hole is overlarge, the pollutants enter the driving cavity of the main valve core through the damping hole to cause the clamping of the main valve core or enter the valve seat of the pilot valve assembly to cause the non-closing of the pilot valve core, the damping hole is too small and is easy to block, so that in the existing hydraulic element and hydraulic system, the failure rate of an overflow valve accounts for more than 50 percent of the total failure rate, the cleanliness of hydraulic oil and the processing burr are pursued once, the system cost is obviously and greatly improved, by arranging the filtering device, when the hydraulic oil enters the damping hole, larger impurity particles are firstly filtered through the filter screen to prevent the blockage of the damping hole, and after the hydraulic oil passes through the filter layer, the diversion can be carried out in the buffer cavity by using the, smaller impurity particles in the hydraulic oil can be deposited in the impurity storage tank, so that the optimal aperture of the damping hole is ensured, and the failure rate of the overflow valve caused by impurities can be reduced; according to the invention, the filtering device is matched with the screw rod protection device, so that impurities can be filtered and cleaned from the position where the impurities of the overflow valve most easily enter, the fault rate of the overflow valve caused by the impurities is greatly reduced, and the normal use of the overflow valve is ensured.
Preferably, a resonance disturbing device is fixedly mounted at a position, close to the oil inlet, of the upper end of the main valve seat, the resonance disturbing device comprises a fixed block fixedly mounted at the upper end of the main valve seat, a sliding groove is formed in the upper surface of the fixed block in an embedded mode, a sliding block is connected inside the sliding groove in a sliding mode, a noise elimination convex block is connected to the fixed block in a sliding mode through the sliding groove and the sliding block, and a throttling groove is formed in the noise elimination.
The noise eliminating device of the overflow valve in the prior art is generally provided with a noise eliminating element in front of a pilot valve part, cannot move, has poor noise eliminating effect, cannot eliminate resonance phenomenon possibly occurring due to vibration, and can freely move in a sliding groove through a sliding block and be provided with a throttling groove on the front and back surfaces of the noise eliminating lug through the arrangement of a resonance disturbing device.
Preferably, a sealing device is arranged at the connecting position of one end of the screw rod protection device and the valve cover, the sealing device comprises a mounting seat fixedly mounted inside the valve cover, a limiting groove is formed in one end of the mounting seat, and a sealing gasket is arranged at a position, close to the limiting groove, inside the mounting seat.
During operation, utilize the hot plate to heat the back that unfreezes adjusting screw and connecting thread at screw rod protection device, inside ice sheet melts to in getting into the valve easily, cause the decline of hydraulic oil purity, through setting up sealing device, screw rod protection device passes through the screw thread and is connected with the spacing groove, and extrude the sealed pad of spacing inslot portion, sealed pad pressurized deformation seals screw rod adjusting device and valve gap connecting position, prevent in the frozen water admission valve, cause the problem of the decline of hydraulic oil purity.
Preferably, the limiting groove is provided with threads on the inner side, the outer side surface of the second barrel is provided with threads opposite to the threads on the inner side of the limiting groove in the rotating direction, and the limiting groove is fixedly connected with the second barrel through the threads.
The screw rod protection device is connected with the limiting groove through threads, the sealing gasket inside the limiting groove is extruded, the sealing gasket is deformed under pressure, the screw rod adjusting device and the valve cover connecting position are sealed, and the problem that the purity of hydraulic oil is reduced due to the fact that ice water enters the valve is solved.
Preferably, the upper surface of valve gap is provided with power source, the power source lower extreme passes through wire and hot plate electric connection, the power source upper end is provided with the lid.
When needs use the hot plate, can supply power through power source interface connection external power, power source interface upper end is provided with the lid simultaneously, can prevent that external dust from getting into power source interface when not using, guarantees power source interface's normal use.
Preferably, a drainage channel is formed in the position, close to the screw rod protection device, of the lower end of the valve cover, the drainage channel is arranged in an inclined mode, and the horizontal inclination angle is in the range from forty-five degrees to ninety degrees.
The lower end of the valve cover is provided with a water drainage channel at a position close to the screw rod protection device, the water drainage channel is obliquely arranged, the horizontal inclination angle is in the range from forty-five degrees to ninety degrees, and a part of ice water can flow out through the water drainage channel after the ice layer is melted, so that the ice water is prevented from entering the valve body.
Preferably, the heating plate is installed in the second cylinder at a position close to the adjusting screw, and the heating plate is a ring-shaped structural member.
The hot plate is installed in the inside position that is close to adjusting screw of second barrel, can heat adjusting screw sooner, improves heating efficiency, reduces latency.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the invention, by arranging the screw rod protection device, under the condition that the adjusting screw rod is frozen, the connecting part of the adjusting screw rod and the connecting thread can be heated through the heating plate to melt an ice layer, so that the problem that the adjusting screw rod and the internal connecting thread are easily damaged to cause equipment damage when the adjusting screw rod needs to be adjusted by using a hand wheel is prevented.
2. According to the invention, by arranging the filtering device, when hydraulic oil enters the damping hole, the larger impurity particles are firstly filtered by the filter screen to prevent the hydraulic oil from blocking the damping hole, and the hydraulic oil can be turned in the buffer cavity by the guide sleeve after passing through the filter layer, so that the smaller impurity particles in the hydraulic oil can be deposited in the impurity storage tank, and the overflow valve failure fault rate caused by impurities can be reduced while the optimal aperture of the damping hole is ensured.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic cross-sectional view of the present invention;
FIG. 3 is a schematic view of the connection structure of the valve cover and the adjusting screw rod of the present invention;
FIG. 4 is a schematic structural view of a screw protection device according to the present invention;
FIG. 5 is a schematic view of the filter apparatus of the present invention;
FIG. 6 is a schematic view of the sealing device of the present invention;
FIG. 7 is a schematic structural diagram of a resonance disrupting apparatus according to the present invention.
Description of reference numerals:
in the figure: 1. a valve body; 2. a valve cover; 3. a conical valve seat; 4. a cone valve; 5. a pressure regulating spring; 6. a screw protection device; 61. mounting a plate; 62. a first cylinder; 63. a connecting spring; 64. a limiting column; 65. a brush; 67. a second cylinder; 68. heating plates; 7. a hand wheel; 8. adjusting the screw rod; 9. a water drainage channel; 10. a filtration device; 101. a buffer chamber; 102. a pod; 103. a flow channel; 104. a filter screen; 105. an impurity storage tank; 11. a main valve spring; 12. a damping hole; 13. a main valve element; 14. a main valve seat; 15. an oil outlet; 16. an oil inlet; 17. a power interface; 18. a sealing device; 181. a mounting seat; 182. a limiting groove; 183. a gasket; 19. a resonance disrupting means; 191. a fixed block; 192. a slider; 193. a chute; 194. a throttling groove; 195. the noise elimination lug boss.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 7, the present invention provides a pressure stabilizing pilot overflow valve, which comprises:
a pressure-stabilizing pilot operated overflow valve is shown in figure 1 and comprises a valve body 1, wherein the upper end of the valve body 1 is fixedly provided with a valve cover 2 through a bolt, one end of the valve cover 2 is provided with an adjusting screw 8 in a penetrating manner, and one end of the adjusting screw 8 is fixedly provided with a hand wheel 7;
as shown in fig. 2, a screw rod protecting device 6 is fixedly arranged at the connecting position of the valve cover 2 and the adjusting screw rod 8, the other end of the adjusting screw 8 penetrates through the valve cover 2 and is fixedly provided with a pressure adjusting spring 5, one end of the pressure adjusting spring 5 is fixedly provided with a cone valve 4, a cone valve seat 3 is arranged at the position close to the cone valve 4 in the valve cover 2, a main valve spring 11 is arranged at the position close to the valve cover 2 at the upper end in the valve body 1, a main valve core 13 is fixedly arranged at the lower end of the main valve spring 11, a damping hole 12 is arranged in the main valve core 13, a filtering device 10 is arranged in the main valve core 13 near the lower end of the damping hole 12, a main valve seat 14 is fixedly arranged in the valve body 1 near the lower position of the main valve core 13, an oil outlet 15 is arranged in the valve body 1 and close to the lower position of the main valve seat 14, and an oil inlet 16 is arranged on the side surface of the valve body 1 corresponding to the main valve seat 14;
as shown in fig. 4, the screw rod protector 6 includes a mounting plate 61 fixedly mounted at one end of the valve cap 2 by bolts, a first cylinder 62 is fixedly mounted at one side of the mounting plate 61, a connecting spring 63 is embedded and mounted on the inner circumferential surface of the first cylinder 62, a limiting column 64 is arranged at the connecting position of the connecting spring 63 and the first cylinder 62, a brush 65 is fixedly mounted at one end of the connecting spring 63, a second cylinder 67 is fixedly mounted at the other side of the mounting plate 61, and a heating plate 68 is embedded and mounted in the second cylinder 67;
as shown in fig. 5, the filtering device 10 includes a buffer cavity 101 disposed inside the main valve element 13 and close to the lower end of the damping hole 12, a filter screen 104 is disposed at the middle position of the lower end of the buffer cavity 101, a flow guide sleeve 102 is fixedly mounted at the upper position of the bottom end inside the buffer cavity 101 close to the filter screen 104, a flow channel 103 is disposed at the lower end of the flow guide sleeve 102, and an impurity storage tank 105 is disposed at one side position of the bottom end inside the buffer cavity 101 close to the filter screen 104.
When the overflow valve in the prior art is used in a cold outdoor environment in winter in the north, a hand wheel 7 and an adjusting screw 8 are frozen due to rain and snow, when the adjustment is required by using the hand wheel 7, connecting threads between the adjusting screw 8 and the inside are easily damaged, equipment is damaged, meanwhile, a protection device is not arranged at the connecting position of the adjusting screw 8 and a valve, an external rod body enters the valve during adjustment, an external threaded rod is exposed in the air during use and is polluted by dust, when the adjusting screw 8 outside the adjusting screw enters the valve during adjustment, hydraulic oil in the valve is polluted, a damping hole 12 is easily blocked to generate irregular pressure change, pressure adjustment cannot be better performed, the normal use of the overflow valve is influenced, by arranging the screw protection device 6, and under the condition that the adjusting screw 8 is frozen, the connecting part between the adjusting screw 8 and the connecting threads can be heated through a heating plate 68, the ice layer is melted, the problem that when the hand wheel 7 is needed to adjust, the connecting threads between the adjusting screw 8 and the inner part are easily damaged, and equipment is damaged is solved, meanwhile, the screw protection device 6 utilizes the connecting spring 63 to extrude the hairbrush 65, when the adjusting screw 8 advances spirally, dust and other impurity particles on the surface of the adjusting screw 8 can be cleaned by the hairbrush 65, and the problems that hydraulic oil in a valve is polluted, the damping hole 12 is blocked to generate irregular pressure change, pressure adjustment cannot be well carried out, and the normal use of an overflow valve is influenced are solved; in the working process of a hydraulic system, the abrasion of each part inevitably generates some pollutants which are mixed in hydraulic oil, when the hydraulic oil passes through the damping hole 12, the damping hole 12 is overlarge, the pollutants enter a driving cavity of the main valve core 13 through the damping hole 12 to cause the clamping of the main valve core 13 or enter a valve seat of a pilot valve assembly to cause the closing of the pilot valve core, the damping hole 12 is too small and is easy to block, so that in the existing hydraulic element and hydraulic system, the failure fault rate of an overflow valve accounts for more than 50 percent of the total fault rate, the cleanliness of hydraulic oil and the processing burr reduction are pursued once, the system cost is obviously and greatly improved, by arranging the filtering device 10, when the hydraulic oil enters the damping hole 12, larger impurity particles are firstly filtered through the filtering net 104 to prevent the blocking of the damping hole 12, and after the hydraulic oil passes through the filtering net 104, the diversion can be carried out in the buffer cavity 101 by using the diversion cover 102, smaller impurity particles in the hydraulic oil can be deposited in the impurity storage tank 105, the optimal aperture of the damping hole 12 is ensured, and meanwhile, the failure rate of the overflow valve caused by impurities can be reduced; according to the invention, by arranging the filtering device 10 and matching with the screw rod protection device 6, impurities can be filtered and cleaned from the position where the impurities of the overflow valve most easily enter, the fault rate of the overflow valve caused by the impurities is greatly reduced, and the normal use of the overflow valve is ensured.
As an embodiment of the present invention, as shown in fig. 7, a resonance disturbing device 19 is fixedly installed at a position, close to the oil inlet 16, of the upper end of the main valve seat 14, the resonance disturbing device 19 includes a fixed block 191 fixedly installed at the upper end of the main valve seat 14, a sliding groove 193 is embedded in the upper surface of the fixed block 191, a sliding block 192 is slidably connected inside the sliding groove 193, the fixed block 191 is slidably connected with a noise elimination bump 195 through the sliding groove 193 and the sliding block 192, and a throttle groove 194 is arranged inside the noise elimination bump 195; when the overflow valve works, the factors of noise generation of the overflow valve are many, the factors are mainly divided into flow velocity sound and mechanical sound, the flow velocity sound is mainly noise generated by oil vibration, cavities, hydraulic impact and other reasons, the noise elimination device of the overflow valve in the prior art is generally provided with a noise elimination element in front of a pilot valve part, cannot move, has poor noise elimination effect, cannot eliminate the resonance phenomenon possibly generated due to vibration, by arranging the resonance disturbing device 19, the noise elimination lug 195 can freely move in the sliding groove 193 through the sliding block 192, and the throttling grooves 194 are arranged on the front surface and the back surface of the noise elimination lug 195, so that the oil can generate a damping effect when flowing to change the original flowing condition, due to the addition of the noise elimination bump 195, a vibration element is added, the original resonance frequency is disturbed, the volume is also reduced, and the rigidity of oil under pressure is increased, so that the possibility of resonance is reduced.
As an embodiment of the present invention, as shown in fig. 6, a sealing device 18 is disposed at a connection position between one end of the screw rod protection device 6 and the valve cap 2, the sealing device 18 includes an installation seat 181 fixedly installed inside the valve cap 2, one end of the installation seat 181 is provided with a limiting groove 182, and a sealing gasket 183 is disposed inside the installation seat 181 and near the limiting groove 182; during operation, utilize hot plate 68 at screw rod protection device 6 to heat the back that unfreezes adjusting screw 8 and connecting thread, inside ice sheet melts, and easily get into in the valve, cause the decline of hydraulic oil purity, through setting up sealing device 18, screw rod protection device 6 is connected with spacing groove 182 through the screw thread, and extrude the sealed pad 183 of spacing groove 182 inside, sealed pad 183 pressurized deformation, seal up screw rod protection device 6 and valve gap 2 hookup location, prevent that the frozen water from getting into in the valve, cause the problem of the decline of hydraulic oil purity.
Specifically, as shown in fig. 6, the inner side of the limiting groove 182 is provided with a thread, the outer side surface of the second cylinder 67 is provided with a thread having a direction opposite to the thread direction of the inner side of the limiting groove 182, and the limiting groove 182 is fixedly connected with the second cylinder 67 through the thread.
Through adopting above-mentioned technical scheme, screw rod protection device 6 is connected with spacing groove 182 through the screw to extrude the inside sealed pad 183 of spacing groove 182, sealed pad 183 pressurized deformation seals screw rod protection device 6 and valve gap 2 hookup location, prevents in the frozen water admission valve, causes the problem of the decline of hydraulic oil purity.
Specifically, as shown in fig. 1, a power interface 17 is disposed on the upper surface of the valve cover 2, the lower end of the power interface 17 is electrically connected to the heating plate 68 through a wire, and a cover is disposed at the upper end of the power interface 17.
Through adopting above-mentioned technical scheme, when needs use hot plate 68, can connect external power through power source 17 and supply power, power source 17 upper end is provided with the lid simultaneously, can prevent that external dust from getting into power source 17 when not using, guarantees power source 17's normal use.
Specifically, as shown in fig. 2, a drain channel 9 is formed at a position of the lower end of the valve cover 2 close to the screw protector 6, the drain channel 9 is arranged in an inclined manner, and the horizontal inclination angle is in a range from forty-five degrees to ninety degrees.
By adopting the technical scheme, the drain channel 9 is arranged at the position, close to the screw rod protection device 6, of the lower end of the valve cover 2, the drain channel 9 is obliquely arranged, the horizontal inclination angle is in the range from forty-five degrees to ninety degrees, and after an ice layer melts, a part of ice water can flow out through the drain channel 9, so that the ice water is prevented from entering the valve body 1.
Specifically, as shown in fig. 4, the heating plate 68 is installed inside the second cylinder 67 at a position close to the adjusting screw 8, and the heating plate 68 is a ring-shaped structural member.
Through adopting above-mentioned technical scheme, hot plate 68 is installed in the inside position that is close to adjusting screw 8 of second barrel 67, can heat adjusting screw 8 sooner, improves heating efficiency, reduces latency.
The using method comprises the following steps: when the invention is used, firstly, the overflow valve is connected with an external pipeline through the oil outlet 15 and the oil inlet 16, the overflow valve can be used after the connection is finished, when the hand wheel 7 and the adjusting screw 8 are frozen in cold outdoor environment in winter in north, meanwhile, the connecting position of the adjusting screw 8 and the valve is not provided with a protection device, an external threaded rod can enter the valve during adjustment, the external threaded rod is exposed in the air during use and can be stained with dust on the surface, through the arrangement of the screw protection device 6, under the condition that the adjusting screw 8 is frozen, the connecting position of the adjusting screw 8 and the connecting thread can be heated through the heating plate 68 to melt an ice layer, the position of the lower end of the valve cover 2 close to the screw protection device 6 is provided with the water drain channel 9, the water drain channel 9 is obliquely arranged, the horizontal inclination angle is in the range of forty-five degrees to ninety degrees, can melt the back at the ice sheet, flow out some frozen water through water escape 9, prevent that frozen water from getting into inside valve body 1, the inside cleaning mechanism that still is provided with of screw protection device 6, utilize connecting spring 63 extrusion brush 65, adjusting screw 8 is when the spiral advances, can utilize brush 65 to clean dust and other impurity particles on adjusting screw 8 surface, through setting up filter equipment 10, hydraulic oil is when getting into damping hole 12, filter great impurity particle through filter screen 104 earlier, prevent it from blockking up damping hole 12, hydraulic oil can utilize kuppe 102 to turn to in cushion chamber 101 after passing through filter screen 104, and then make in the hydraulic oil less impurity particle can deposit in impurity hold up tank 105, when guaranteeing the best aperture of damping hole 12, can also reduce the overflow valve failure rate that arouses because of impurity.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a steady voltage pilot-operated overflow valve, includes valve body (1), its characterized in that: the upper end of valve body (1) has valve gap (2) through bolt fixed mounting, the one end of valve gap (2) runs through and is provided with adjusting screw (8), the one end fixed mounting of adjusting screw (8) has hand wheel (7), there is screw rod protection device (6) valve gap (2) and the hookup location fixed mounting of adjusting screw (8), the other end of adjusting screw (8) runs through valve gap (2) and fixed mounting has pressure regulating spring (5), pressure regulating spring (5) one end fixed mounting has cone valve (4), the inside position that is close to cone valve (4) of valve gap (2) is provided with conical valve seat (3), the inside upper end position of valve body (1) is close to the position of valve gap (2) and is provided with main valve spring (11), main valve spring (11) lower extreme fixed mounting has main valve core (13), main valve core (13) inside damping hole (12) have been seted up, a filtering device (10) is arranged in the main valve core (13) close to the lower end of the damping hole (12), a main valve seat (14) is fixedly arranged in the valve body (1) close to the lower position of the main valve core (13), an oil outlet (15) is arranged in the valve body (1) close to the lower position of the main valve seat (14), and an oil inlet (16) is formed in the side surface of the valve body (1) corresponding to the position of the main valve seat (14);
the screw rod protection device (6) comprises a mounting plate (61) fixedly mounted at one end of the valve cover (2) through a bolt, a first cylinder (62) is fixedly mounted at one side of the mounting plate (61), a connecting spring (63) is embedded into the inner circular surface of the first cylinder (62), a limiting column (64) is arranged at the connecting position of the connecting spring (63) and the first cylinder (62), a brush (65) is fixedly mounted at one end of the connecting spring (63), a second cylinder (67) is fixedly mounted at the other side of the mounting plate (61), and a heating plate (68) is embedded into the second cylinder (67);
filter equipment (10) is including setting up in buffer chamber (101) that is close to damping hole (12) lower extreme in main valve core (13) inside, buffer chamber (101) lower extreme intermediate position is provided with filter screen (104), the top position fixed mounting that buffer chamber (101) inside bottom is close to filter screen (104) has kuppe (102), runner (103) have been seted up to kuppe (102) lower extreme, one side position that buffer chamber (101) inside bottom is close to filter screen (104) is provided with impurity hold up tank (105).
2. The pressure stabilizing pilot operated relief valve according to claim 1, characterized in that: the resonance disturbing device (19) is fixedly installed at a position, close to the oil inlet (16), of the upper end of the main valve seat (14), the resonance disturbing device (19) comprises a fixed block (191) fixedly installed at the upper end of the main valve seat (14), a sliding groove (193) is formed in the upper surface of the fixed block (191) in an embedded mode, a sliding block (192) is connected inside the sliding groove (193) in a sliding mode, the fixed block (191) is connected with a noise elimination bump (195) through the sliding groove (193) and the sliding block (192) in a sliding mode, and a throttling groove (194) is formed inside the noise.
3. The pressure stabilizing pilot operated relief valve according to claim 1, characterized in that: screw rod protection device (6) one end is provided with sealing device (18) with the hookup location of valve gap (2), sealing device (18) are including fixed mounting in inside mount pad (181) of valve gap (2), the one end of mount pad (181) is provided with spacing groove (182), the inside position that is close to spacing groove (182) of mount pad (181) is provided with sealed pad (183).
4. The pressure stabilizing pilot operated relief valve according to claim 3, characterized in that: the limiting groove (182) is provided with threads on the inner side, the outer side face of the second barrel body (67) is provided with threads opposite to the threads on the inner side of the limiting groove (182), and the limiting groove (182) is fixedly connected with the second barrel body (67) through the threads.
5. The pressure stabilizing pilot operated relief valve according to claim 1, characterized in that: the upper surface of valve gap (2) is provided with power source (17), power source (17) lower extreme passes through wire and hot plate (68) electric connection, power source (17) upper end is provided with the lid.
6. The pressure stabilizing pilot operated relief valve according to claim 1, characterized in that: the lower end of the valve cover (2) is close to the screw rod protection device (6) and is provided with a drainage channel (9), the drainage channel (9) is obliquely arranged, and the horizontal inclination angle is in the range from forty-five degrees to ninety degrees.
7. The pressure stabilizing pilot operated relief valve according to claim 1, characterized in that: the heating plate (68) is arranged at the position, close to the adjusting screw rod (8), inside the second barrel (67), and the heating plate (68) is a component of an annular structure.
CN202011014254.0A 2020-09-23 2020-09-23 Pressure-stabilizing pilot overflow valve Pending CN112096961A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011014254.0A CN112096961A (en) 2020-09-23 2020-09-23 Pressure-stabilizing pilot overflow valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011014254.0A CN112096961A (en) 2020-09-23 2020-09-23 Pressure-stabilizing pilot overflow valve

Publications (1)

Publication Number Publication Date
CN112096961A true CN112096961A (en) 2020-12-18

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011014254.0A Pending CN112096961A (en) 2020-09-23 2020-09-23 Pressure-stabilizing pilot overflow valve

Country Status (1)

Country Link
CN (1) CN112096961A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113446277A (en) * 2021-05-22 2021-09-28 毛克徽 Buffer overflow valve
CN113757446A (en) * 2021-08-11 2021-12-07 毛克徽 Anti-pollution pilot operated overflow valve
CN114178238A (en) * 2021-11-10 2022-03-15 贵州蔚源中药材产业开发有限公司 Belt cleaning device convenient to bletilla edulcoration

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113446277A (en) * 2021-05-22 2021-09-28 毛克徽 Buffer overflow valve
CN113757446A (en) * 2021-08-11 2021-12-07 毛克徽 Anti-pollution pilot operated overflow valve
CN114178238A (en) * 2021-11-10 2022-03-15 贵州蔚源中药材产业开发有限公司 Belt cleaning device convenient to bletilla edulcoration
CN114178238B (en) * 2021-11-10 2023-12-12 赣州靖扬科技有限公司 Cleaning device convenient for rhizoma bletillae impurity removal

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Application publication date: 20201218