CN107489799B - Efficient guide overflow valve - Google Patents
Efficient guide overflow valve Download PDFInfo
- Publication number
- CN107489799B CN107489799B CN201710771516.XA CN201710771516A CN107489799B CN 107489799 B CN107489799 B CN 107489799B CN 201710771516 A CN201710771516 A CN 201710771516A CN 107489799 B CN107489799 B CN 107489799B
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- China
- Prior art keywords
- pilot
- valve body
- valve
- sleeve
- 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.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 30
- 230000001105 regulatory effect Effects 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 239000003921 oil Substances 0.000 description 16
- 239000010720 hydraulic oil Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000004323 axial length Effects 0.000 description 2
- 238000005056 compaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
- F16K17/10—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 auxiliary valve for fluid operation of the main valve
-
- 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
- F16K17/06—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 special arrangements for adjusting the opening pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
- Details Of Valves (AREA)
- Safety Valves (AREA)
Abstract
The application discloses a high-efficiency pilot overflow valve, which comprises a main valve body and a pilot valve body, wherein the main valve body and the pilot valve body are fixedly connected through a screw, a main valve sleeve is arranged in the main valve body, a main valve core is arranged in a main valve sleeve, a pilot valve sleeve and a pressure regulating device are arranged in the pilot valve body, a concave hole is arranged at the bottom end of the pilot valve body, the top end of the main valve sleeve is positioned in the concave hole, and the main valve sleeve and the concave hole are sealed through a radial sealing mechanism. The application has compact structure, greatly improved sealing performance and very quick response of opening and closing.
Description
Technical Field
The application relates to the field of hydraulic control valves, in particular to a high-efficiency pilot overflow valve.
Background
Referring to fig. 1, a main valve sleeve 3' is installed in a main valve body 1' of a prior pilot overflow valve, sealing between the outer surface of the main valve sleeve 3' and the main valve body 1' is responsible for radial sealing by a sealing ring 16', sealing between the upper end surface of the main valve sleeve 3' and a pilot valve body 4' is responsible for axial sealing by a sealing ring 11', the main valve body 1' and the pilot valve body 4' are connected through screws, elastic force of the sealing ring 11' is counteracted during compaction, actual compaction force can be reduced, and oil leakage is easy between the main valve body 1' and the pilot valve body 4' under high-pressure operation, particularly under impact load.
In addition, the excircle of the pilot valve seat 8 'of the existing pilot overflow valve is in interference fit with the inner hole of the pilot valve body 4', so that the assembly is required to be cooled by liquid nitrogen, and the assembly is troublesome.
In addition, the sleeve 6 'of the existing pilot overflow valve is generally provided with a damping hole 7', so that the machining is inconvenient, the sleeve 6 'is in clearance fit with the pilot valve body 4', the pilot valve seat 8 'is blocked by the steel wire check ring 5', and the pilot valve seat 8 'is blocked by the steel wire check ring 9', so that the structure is loose.
In addition, the existing pilot overflow valve generally forms a pressure adjusting device through components such as a spring 12', a spring seat 13', a threaded sleeve 14', a threaded rod 15', a pilot valve core 10', and the like, the threaded sleeve 14' is arranged at a port of the pilot valve body 4', the threaded rod 15' passes through the threaded sleeve 14' to be positioned in an inner cavity of the pilot valve body 4', the spring seat 13' is arranged at the end part of the threaded rod 15', the spring 12' is arranged on the spring seat 13', one end of the pilot valve core 10' is connected with the spring 12', and the other end of the pilot valve core is connected with the pilot valve seat 8', and the axial length of the pilot overflow valve is greatly increased due to the structure, so that the pilot overflow valve is very inconvenient to use.
In addition, the main valve core 2 'and the main valve sleeve 3' of the existing pilot overflow valve are in surface contact sealing, and the opening and closing response is slower.
Disclosure of Invention
The present application is directed to solving the above-described problems, thereby providing a pilot relief valve that is efficient.
In order to achieve the above purpose, the technical scheme of the application is as follows:
the utility model provides an efficient guide overflow valve, guide overflow valve includes main valve body and pilot valve body, through screw fixed connection between main valve body and the pilot valve body, be equipped with the main valve barrel in the main valve body, be equipped with the main valve core in the main valve barrel, be equipped with pilot valve barrel and pressure regulating device in the pilot valve body, the pilot valve body bottom is equipped with the shrinkage pool, the top of main valve barrel is located the shrinkage pool, seal through radial sealing mechanism between main valve barrel and the shrinkage pool.
In a preferred embodiment of the application, the pilot valve sleeve is integrally and removably mounted at one end within the pilot valve body by threads.
In a preferred embodiment of the application, a damper and a filter screen are provided within the valve sleeve.
In a preferred embodiment of the application, the pressure regulating device comprises a conical valve core, a pressure regulating spring, a regulating rod, a steel wire retainer ring and a nut, wherein the regulating rod is arranged at the other end in the pilot valve body and is fixed through the nut, a spring cavity is arranged in the regulating rod, the pressure regulating spring is arranged in the spring cavity, the horizontal end of the conical valve core is positioned in the spring cavity and is connected with the pressure regulating spring in a matched manner, and the conical end of the conical valve core is directly contacted with the pilot valve sleeve.
In a preferred embodiment of the application, the adjusting rod is provided with a limit groove.
In a preferred embodiment of the application, a seal ring groove is arranged on the adjusting rod, and a first seal ring is arranged in the seal ring groove.
In a preferred embodiment of the application, a number of second sealing rings are arranged between the pilot valve sleeve and the pilot valve body.
In a preferred embodiment of the application, two radial sealing ring rods are arranged between the main valve sleeve and the main valve body.
In a preferred embodiment of the present application, a line contact seal is employed between the main valve spool and the main valve sleeve.
The beneficial effects of the application are as follows:
the application has compact structure, greatly improved sealing performance and very quick response of opening and closing.
Drawings
In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art pilot relief valve;
FIG. 2 is a schematic diagram of the structure of the present application;
FIG. 3 is a schematic view of the main valve sleeve according to the present application;
FIG. 4 is a schematic view of the structure of the pilot valve body of the present application;
FIG. 5 is a schematic view of the structure of the pilot valve sleeve of the present application;
fig. 6 is a schematic structural view of an adjusting lever in the present application.
Detailed Description
The application is further described with reference to the following detailed drawings in order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the implementation of the application easy to understand.
Referring to fig. 2 to 6, the high-efficiency pilot overflow valve provided by the application comprises a main valve body 1 and a pilot valve body 7, wherein the main valve body 1 and the pilot valve body 7 are fixedly connected through screws, a main valve sleeve 3 is arranged in the main valve body 1, a main valve core 2 is arranged in a main valve sleeve 3, and a pilot valve sleeve 8 and a pressure regulating device are arranged in the pilot valve body 7.
The main valve body 1 and the pilot valve body 7 are fixedly connected through screws, a concave hole 71 is formed in the bottom of the pilot valve body 7, and the opening diameter of the concave hole 71 is correspondingly matched with the main valve sleeve 3. A steel wire check ring groove 72 is arranged on the end face of the pilot valve body 7 and is used for installing the steel wire check ring 18.
The main valve sleeve 3 and the concave hole 71 are sealed by a radial sealing mechanism, and the radial sealing mechanism can be specifically a sealing ring 6.
Like this, because seal ring 6 cover is established at the tip that main valve cover 3 is located the shrinkage pool 71, when main valve body 1 and pilot valve body 7 are connected, seal ring 6 is radial seal, and not axial seal, avoided the condition that original axial seal ring elastic force offset screw clamp force like this to can not the oil leak, improved the leakproofness.
In addition, two radial sealing ring rods 20 are arranged between the main valve sleeve 3 and the main valve body 1, so that the sealing performance of the application is more reliable.
Furthermore, the main valve core 2 and the main valve sleeve 3 adopt a line contact sealing structure, so that the opening and closing response of the application is very fast.
The pilot valve body 7 is hollow, a thread is arranged on one side of the inner cavity of the pilot valve body 7, the whole pilot valve sleeve 8 is detachably fixed on one side of the pilot valve body 7 through the thread, a filter screen 10 and a damper 11 are arranged in the pilot valve sleeve 8, and a retainer ring 9 is arranged on the filter screen 10, so that the pilot valve sleeve 8 is of an integrated structure, a pilot valve seat is not required to be arranged, the pilot valve sleeve 8 can be in direct contact with a pressure regulating device, parts are saved, the pilot overflow valve is compact in structure, and the pilot overflow valve is convenient to use.
In order to improve the tightness, a plurality of second sealing rings are arranged between the pilot valve sleeve 8 and the pilot valve body 7, and two second sealing rings, namely a second sealing ring 12 and a second sealing ring 13, are specifically arranged in the application.
The pressure adjusting device is arranged at the other end in the pilot valve body 7 and comprises a conical valve core 14, a pressure adjusting spring 17, an adjusting rod 15, a steel wire check ring 18 and a nut 19.
The regulating rod 15 is arranged at the other end in the pilot valve body 7 and is fixed through a nut 19, a spring cavity is arranged in the regulating rod 15, the pressure regulating spring 17 is arranged in the spring cavity, the horizontal end of the conical valve core 14 is positioned in the spring cavity and is connected with the pressure regulating spring 17 in a matched manner, and the conical end of the conical valve core 14 is directly contacted with the end face of the pilot valve sleeve 8.
Through the structure, the screw sleeve and the spring seat are omitted, and the spring cavity is directly arranged in the adjusting rod 15, so that the axial length of the pilot overflow valve is greatly shortened, and the external dimension is reduced.
In addition, because the application adopts the single-rod structure of the adjusting rod 15, the adjusting rod 15 is easy to be separated when being arranged in the pilot valve body 7, the application is provided with the limiting groove 151 on the adjusting rod 15, the steel wire check ring 18 is sleeved on the steel wire check ring groove 72, and when the adjusting rod 15 is arranged in the pilot valve body 7, the steel wire check ring 18 can limit the adjusting rod 15, thus preventing the separating of the adjusting rod 15.
Furthermore, a seal ring groove 152 is further arranged on the adjusting rod 15, a first seal ring 16 is arranged in the seal ring groove 152, and the first seal ring 16 can improve the tightness between the adjusting rod 15 and the pilot valve body 7.
The following is a specific working principle of the application:
the pressure of the pressure oil on the oil port A on the main valve body 1 reaches the channel of the pilot valve body 7 through the damper 21 and the channel of the main valve body 1, and then reaches the containing cavity of the spring 5 in the main valve sleeve 3 through the channel of the filter screen 10, the damper 11 and the pilot valve sleeve 8, and the pressure of the spring 5 is added to the pressure to close the main valve core 2. Meanwhile, the pressure acts on the cone valve core 14, when the pressure of hydraulic oil is smaller than the force of the pressure regulating spring 17, the cone valve core 14 is closed, when the pressure of the hydraulic oil is larger than the force of the pressure regulating spring 17, the cone valve core 14 is opened, pilot hydraulic oil reaches the inner channel of the pilot valve body 7 through the inner channel of the regulating rod 15 and then reaches the B oil port on the main valve body 1 through the channel of the main valve body 1, at the moment, the hydraulic oil generates a pressure difference through the damper 21 and the damper 11 because of flowing, so that the force below the main valve core 2 is larger than the force above, the pressure difference overcomes the force of the spring 5, the main valve core 2 is opened, the oil flows from the A oil port to the B oil port, and the pressure of the pressure oil in the A oil port is not increased any more, so that the effect of an overflow valve is achieved.
And the X oil port is an external control port, when the pressure of the A oil port does not reach the set pressure of the pressure regulating device, the hydraulic control valve is in a closed state, if the pressure of the X oil port communicated with the hydraulic control valve is smaller than the set pressure of the pressure regulating device, the two ends of the damper 21 have pressure difference, the main valve core 2 is opened, and oil flows from the A oil port to the B oil port to play a role of an overflow valve.
The foregoing has shown and described the basic principles and main features of the present application and the advantages of the present application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present application, and various changes and modifications may be made without departing from the spirit and scope of the application, which is defined in the appended claims. The scope of the application is defined by the appended claims and equivalents thereof.
Claims (9)
1. The pilot overflow valve comprises a main valve body and a pilot valve body, wherein the main valve body and the pilot valve body are fixedly connected through a screw, a main valve sleeve is arranged in the main valve body, a main valve core is arranged in the main valve sleeve, the pilot valve body is internally provided with a pilot valve sleeve and a pressure regulating device, and is characterized in that,
the inside of the pilot valve body is hollow, a thread is arranged on one side of the inner cavity of the pilot valve body, the whole pilot valve sleeve is detachably fixed on one side of the pilot valve body through the thread, a filter screen and a damper are arranged in the pilot valve sleeve, a check ring is arranged on the filter screen, the pilot valve sleeve is of an integrated structure, a pilot valve seat is not required to be arranged, and the pilot valve sleeve is in direct contact with the pressure regulating device;
the pilot valve body bottom is equipped with the shrinkage pool, and when main valve body and pilot valve body connect, the top of the main valve cover that is located the main valve body just is located the shrinkage pool to there is little axial clearance at the hole bottom of shrinkage pool, with the internal oil duct intercommunication of pilot valve, seal through radial sealing mechanism between main valve cover and the shrinkage pool.
2. A high efficiency pilot relief valve according to claim 1, wherein said pilot sleeve is integrally threaded at one end within the pilot body.
3. The efficient pilot relief valve of claim 2 wherein a damper and filter screen are disposed within the pilot sleeve.
4. The efficient pilot overflow valve according to claim 3, wherein the pressure adjusting device comprises a conical valve core, a pressure adjusting spring, an adjusting rod, a steel wire retainer ring and a nut, the adjusting rod is arranged at the other end in the pilot valve body and is fixed through the nut, a spring cavity is arranged in the adjusting rod, the pressure adjusting spring is arranged in the spring cavity, the horizontal end of the conical valve core is positioned in the spring cavity and is connected with the pressure adjusting spring in a matched mode, and the conical end of the conical valve core is directly contacted with the pilot valve sleeve.
5. The efficient pilot overflow valve of claim 4, wherein the regulating rod is provided with a limit groove.
6. The efficient pilot overflow valve of claim 4, wherein the adjusting rod is provided with a sealing ring groove, and a first sealing ring is arranged in the sealing ring groove.
7. The efficient pilot relief valve of claim 2, wherein a plurality of second sealing rings are provided between the pilot sleeve and the pilot body.
8. The efficient pilot relief valve of claim 1 wherein two radial sealing ring rods are provided between the main valve sleeve and the main valve body.
9. The efficient pilot relief valve of claim 1 wherein a line contact seal is employed between the main spool and the main valve sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771516.XA CN107489799B (en) | 2017-08-31 | 2017-08-31 | Efficient guide overflow valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710771516.XA CN107489799B (en) | 2017-08-31 | 2017-08-31 | Efficient guide overflow valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107489799A CN107489799A (en) | 2017-12-19 |
| CN107489799B true CN107489799B (en) | 2023-11-03 |
Family
ID=60645938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710771516.XA Active CN107489799B (en) | 2017-08-31 | 2017-08-31 | Efficient guide overflow valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107489799B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587719A (en) * | 2004-08-04 | 2005-03-02 | 浙江大学 | Pilot type pure water overflow valve |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN106224607A (en) * | 2016-09-26 | 2016-12-14 | 东洋重工机（大连）有限公司 | A kind of screw thread high pressure inserted valve |
| CN207229853U (en) * | 2017-08-31 | 2018-04-13 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
-
2017
- 2017-08-31 CN CN201710771516.XA patent/CN107489799B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1587719A (en) * | 2004-08-04 | 2005-03-02 | 浙江大学 | Pilot type pure water overflow valve |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| CN102444637A (en) * | 2011-09-27 | 2012-05-09 | 广西柳工机械股份有限公司 | Plug-in overflow valve |
| CN106224607A (en) * | 2016-09-26 | 2016-12-14 | 东洋重工机（大连）有限公司 | A kind of screw thread high pressure inserted valve |
| CN207229853U (en) * | 2017-08-31 | 2018-04-13 | 上海立新液压有限公司 | A kind of efficient precursor overflow valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107489799A (en) | 2017-12-19 |
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