CN202280105U - Novel mounting structure for oil return back-pressure valve of hydraulic system of excavator - Google Patents
Novel mounting structure for oil return back-pressure valve of hydraulic system of excavator Download PDFInfo
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- CN202280105U CN202280105U CN2011202832521U CN201120283252U CN202280105U CN 202280105 U CN202280105 U CN 202280105U CN 2011202832521 U CN2011202832521 U CN 2011202832521U CN 201120283252 U CN201120283252 U CN 201120283252U CN 202280105 U CN202280105 U CN 202280105U
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Abstract
The utility model discloses a novel mounting structure for an oil return back-pressure valve of the hydraulic system of an excavator. The mounting structure comprises a main valve, an oil return valve block, a main oil return pipeline, a by-pass oil return pipeline, a high-pressure one-way valve, a low-pressure one-way valve and a cooling system, wherein the oil return valve block is fixedly mounted on the main valve and is connected with the oil return opening of the main valve; the high-pressure one-way valve and the low-pressure one-way valve are fixedly mounted in the oil return valve block; the main oil return pipeline and the by-pass oil return pipeline are respectively connected with two ends of the oil return valve block; and the low-pressure one-way valve is connected in parallel with the cooling system and is then connected in series with the high-pressure one-way valve. The mounting structure disclosed by the utility model has the advantages as follows: through the adoption of the structure that the two one-way valves are mounted in the oil return valve block, the back pressure of the hydraulic system can be reduced effectively, so as to ensure the stable back pressure of the hydraulic system; the mounting and the maintenance are convenient; the production cost is reduced; and the mounting structure is simple, convenient and practical.
Description
Technical field
The utility model relates to a kind of excavator and uses equipment, relates to a kind of novel excavator hydraulic system return oil pressure valve mounting structure specifically.
Background technology
Hydraulic crawler excavator is to unload the self-propelled mining machinery that the place unloads with scraper bowl from work plane shovel dress overburden or mineral products and with its row of being transported to, and it mainly comprises structures such as equipment, slewing equipment, running gear, dynamical system.Hydraulic crawler excavator mainly is to be that executive component provides power through the pressure oil pressure produced that flows.Hydraulic system is the system that power is provided for the work of excavator, comprises a way to cycle oil as the one of which, and the pressure oil in the hydraulic oil container flows back to hydraulic oil container at last again through in the laggard spool of going into main valve of main pump.Generally provide, through flowing back to hydraulic oil container at last behind the elements such as return line by main pump.
For safety and the stability that improves hydraulic system, the oil return of the main valve of flowing through is generally at first through an oil return valve, and then flows back in the middle of the hydraulic oil container via return line.See also shown in Figure 1; Patent CN201635110 discloses a kind of return line structure of excavator; The return line that it comprises a high pressure counterbalance valve 50, a low pressure counterbalance valve 40 and connects main valve oil return to fuel tank, wherein, the oil return opening of main valve is provided with an oil return valve piece 30; The two ends of oil return valve piece 30 are inserted first pipeline 10 and second pipeline 20 respectively; The other end of first pipeline 10, second pipeline 20 inserts return line respectively, and high pressure counterbalance valve 50 and low pressure counterbalance valve 40 are arranged at respectively in first pipeline 10, second pipeline 20, and the oil return opening of main valve is through high pressure counterbalance valve 50 or low pressure counterbalance valve 40 and corresponding pipeline and return line conductings.Above-mentioned return line structure is owing to be installed in two counterbalance valves among the return line; And the oil return valve piece is directly installed on the oil return opening of main valve; Thereby avoided the combining structure of a plurality of valve pieces, and then simplified the return line structure, and saved installation cost to a certain extent.But; Above-mentioned return line structure also exists certain defective: (1) is because the back pressure that high pressure counterbalance valve and low pressure counterbalance valve are produced is excessive; Cause hydraulic jack, hydraulic motor creeping phenomenon to occur easily, and then cause the unstability of water brake braking; (2) because above-mentioned technical scheme adopts counterbalance valve is installed in the mounting means among the pipeline, has caused certain trouble with safeguarding for installation, maintenance; (3) owing to adopt the mounting means of high pressure counterbalance valve and the parallel connection of low pressure counterbalance valve, make both, caused the unstability of hydraulic system for the back pressure difference that main oil return line produced; (4) owing to adopt the less tubular type one way valve of flow, cause the return oil pressure of system excessive easily, have certain security risk as counterbalance valve.
The utility model content
The purpose of the utility model is to provide a kind of return oil pressure valve mounting structure of novel excavator hydraulic system, and the back pressure that it can effectively reduce system has realized the back pressure that hydraulic system is stable, and is simple in structure, is convenient to installation and maintenance.
For solving above-mentioned purpose, the technical scheme that the utility model provided is:
A kind of novel excavator hydraulic system return oil pressure valve mounting structure wherein, comprises main valve, oil return valve piece, main return line, bypass return line, high pressure one way valve, low pressure check valve and cooling system; Wherein, Said oil return valve piece is fixedly mounted on the said main valve; And be connected with the oil return opening of said main valve; Said high pressure one way valve, said low pressure check valve are fixedly mounted in the said oil return valve piece, and said main return line, said bypass return line are connected to the two ends of said oil return valve piece, and connect with said high pressure one way valve after said low pressure check valve and the said cooling system parallel connection.
Above-mentioned novel excavator hydraulic system return oil pressure valve mounting structure, wherein, the opening pressure of said high pressure one way valve is 2.9Pa.
Above-mentioned novel excavator hydraulic system return oil pressure valve mounting structure, wherein, the opening pressure of described low pressure check valve is 1.7Pa.
Above-mentioned novel excavator hydraulic system return oil pressure valve mounting structure, wherein, described high pressure one way valve is the plug-in type one way valve.
Above-mentioned novel excavator hydraulic system return oil pressure valve mounting structure, wherein, described low pressure check valve is the plug-in type one way valve.
A kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model is installed in the structure in the oil return valve piece owing to adopt with two one way valves, can effectively reduce the back pressure of system; Realize the stable back pressure of hydraulic system; And convenient the installation and maintenance reduced cost of production, improved production efficiency; Simple in structure, convenient and practical.
Description of drawings
Fig. 1 is the structural representation of excavator return line structure in the prior art;
Fig. 2 is the structural representation of a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model;
Fig. 3 is that high pressure one way valve and the installation site of low pressure check valve and oil return valve piece in a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model shown in Figure 2 concerns sketch map;
Fig. 4 is the schematic diagram of a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model.
The specific embodiment
Come a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model is done explanation in further detail below in conjunction with the Figure of description and the specific embodiment.
Just be based on the return oil pressure valve mounting structure of existing excavator hydraulic system and proposed the utility model various embodiments.
Like Fig. 2, Fig. 3 and shown in Figure 4, a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model comprises main valve 1; Oil return valve piece 2; Main return line 3, bypass return line 4, high pressure one way valve 5, low pressure check valve 6 and cooling system 7; Wherein, oil return valve piece 2 is fixedly mounted on the main valve 1, and is connected with the oil return opening of main valve 1; High pressure one way valve 5, low pressure check valve 6 are all the plug-in type one way valve, and the two is fixedly mounted in the oil return valve piece 2, and low pressure check valve 6 is connected with high pressure one way valve 5 with cooling system 7 parallel connection backs; Main return line 3, bypass return line 4 are connected to the two ends of oil return valve piece 2; Wherein, in the present embodiment, the opening pressure of high pressure one way valve 5, low pressure check valve 6 is respectively 2.9Pa and 1.7Pa; And main return line 3, bypass return line 4 are respectively oil return steel pipe (main return line 3, bypass return line 4 is merely the part of corresponding return line).
Please especially referring to shown in Figure 4; The operating principle of the return oil pressure valve mounting structure of a kind of novel excavator hydraulic system of the utility model is following: at first; Come the oil return of autonomous valve 1 to get in the oil return valve piece 2 through high pressure one way valve 5; Then, get back in the hydraulic oil container 8 with cooling system 7 through main return line 3; In case and cooling system 7 stops up, the pressure in the hydraulic system increases, as long as open and the cooling system 7 parallel low pressure check valve 6 that are connected, then also gets back in the hydraulic oil container 8 through bypass return line 4 and corresponding pipeline thereof.
In sum, adopt a kind of novel excavator hydraulic system return oil pressure valve mounting structure of the utility model of said structure to have following advantage:
(1) owing to adopt two one way valves to be installed in the structure in the oil return valve piece, can effectively reduce the back pressure of system, eliminate the unstability of skidding, and convenient the installation and maintenance;
(2) owing to adopted the mounting structure of connecting with the high pressure one way valve again, can effectively improve the stability of system back pressure with after low pressure check valve and the cooling system parallel connection;
(3) because high pressure one way valve and low pressure check valve all adopt the plug-in type one way valve; It is compared with the one way valve that tubular type is installed; The adjusting of stroke ground can be easily carried out and the adjusting of system back pressure can be carried out as required; When the spring of one way valve consumes owing to long-time use, can also increase the service life through stroke adjustment.
Owing to adopt two one way valves are installed in the structure in the oil return valve piece, can effectively reduce the back pressure of system, realize the stable back pressure of hydraulic system, and convenient the installation and maintenance, reduced cost of production, improved production efficiency, simple in structure, convenient and practical.
Should be pointed out that foregoing is the enumerating of specific embodiment of the utility model, equipment of wherein describing in detail to the greatest extent and structure are construed as with the common mode in this area to be implemented; And above-mentioned specific embodiment is not the practical range that is used for limiting the utility model, and promptly all equivalent transformation and modifications of being done according to the utility model content of the patent all fall into the protection domain of the utility model.
Claims (5)
1. a novel excavator hydraulic system return oil pressure valve mounting structure is characterized in that, comprises main valve, oil return valve piece, main return line, bypass return line, high pressure one way valve, low pressure check valve and cooling system; Wherein, Said oil return valve piece is fixedly mounted on the said main valve; And be connected with the oil return opening of said main valve; Said high pressure one way valve, said low pressure check valve are fixedly mounted in the said oil return valve piece, and said main return line, said bypass return line are connected to the two ends of said oil return valve piece, and connect with said high pressure one way valve after said low pressure check valve and the said cooling system parallel connection.
2. novel excavator hydraulic system return oil pressure valve mounting structure as claimed in claim 1 is characterized in that the opening pressure of said high pressure one way valve is 2.9Pa.
3. novel excavator hydraulic system return oil pressure valve mounting structure as claimed in claim 1 is characterized in that the opening pressure of described low pressure check valve is 1.7Pa.
4. according to claim 1 or claim 2 novel excavator hydraulic system return oil pressure valve mounting structure is characterized in that described high pressure one way valve is the plug-in type one way valve.
5. like claim 1 or 3 described novel excavator hydraulic system return oil pressure valve mounting structures, it is characterized in that described low pressure check valve is the plug-in type one way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202832521U CN202280105U (en) | 2011-08-05 | 2011-08-05 | Novel mounting structure for oil return back-pressure valve of hydraulic system of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202832521U CN202280105U (en) | 2011-08-05 | 2011-08-05 | Novel mounting structure for oil return back-pressure valve of hydraulic system of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202280105U true CN202280105U (en) | 2012-06-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202832521U Expired - Fee Related CN202280105U (en) | 2011-08-05 | 2011-08-05 | Novel mounting structure for oil return back-pressure valve of hydraulic system of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202280105U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
-
2011
- 2011-08-05 CN CN2011202832521U patent/CN202280105U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120620 Termination date: 20150805 |
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| EXPY | Termination of patent right or utility model |