CN201991859U - Four-path pedal pilot valve - Google Patents
Four-path pedal pilot valve Download PDFInfo
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- CN201991859U CN201991859U CN2011200965482U CN201120096548U CN201991859U CN 201991859 U CN201991859 U CN 201991859U CN 2011200965482 U CN2011200965482 U CN 2011200965482U CN 201120096548 U CN201120096548 U CN 201120096548U CN 201991859 U CN201991859 U CN 201991859U
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Abstract
The utility model discloses a four-path pedal pilot valve, which comprises a valve body (1), wherein four valve cores (2) are arranged in the valve body (1); valve handles (3) are respectively arranged on valve cores (2) and are sleeved by pressure-regulating springs (4); an operation shaft (5) which is in contact with the valve handles (3) and is used for controlling the valve handles (3) to operate is mounted at the upper part of the valve body (1); two pedals (7) which drive the operation shaft (5) to operate are respectively arranged on two sides of the valve body (1); the two pedals (7) are respectively connected with the end parts of the operation shaft (5) through an arm plate (6); and an integral dustproof cover (8) is connected with the upper part of the valve body (1); and covers the upper part of the valve body (1) and the operation shaft (5). The utility model has the advantages of small size, favorable dustproof effect, convenience in maintenance, low manufacturing cost, small space occupying a hydraulic system of an engineering machine, long service life, reliable work performance, and the like; and in addition, dust is effectively prevented from leaking into the valve body, so that the faults such as oil leakage or valve core locking, and the like are prevented.
Description
Technical field
The utility model relates to a kind of pilot valve, particularly relates to a kind of four tunnel foot-operated pilot valves.
Background technique
Four tunnel foot-operated pilot valves are a kind of foot-operated proportional pressure-reducing valves, are mainly used in the remote control control of pump, valve and motor in engineering machinery, mining machinery, crane gear and other the various machinery hydraulic systems.It uses and requires in the operating process to realize accurate control with very little power.This is that this valve uses an important feature in the operating process.
Existing four tunnel foot-operated pilot valves, be the four tunnel foot-operated pilot valves that are combined into by the two-way pilot valve, the pedal of the control spool valve handle action of existing four tunnel foot-operated pilot valves is set directly at the top of valve body, its overall volume is big, in construction machinery hydraulic system, taken bigger installing space, bothered very much during maintenance.Do not have comparatively ideal proofing dust and protecting measure in addition on existing four tunnel foot-operated pilot valves, the Yi Fashengyin dust infiltrates and makes faults such as valve body leakage of oil or spool be stuck.Therefore the using effect of existing four tunnel foot-operated pilot valves still is not ideal enough.
Summary of the invention
The purpose of this utility model is, thus provide a kind of volume little, be convenient to safeguard, good dustproof effect, and the four tunnel foot-operated pilot valves that can effectively stop dust to infiltrate to prevent in the valve body faults such as leakage of oil or spool be stuck from occurring, to overcome the deficiencies in the prior art.
The utility model is achieved in that of the present utility model a kind of four tunnel foot-operated pilot valves are to improve to form on the basis of existing four tunnel foot-operated pilot valves, four tunnel foot-operated pilot valves of model utility comprise valve body, are provided with four spools in the valve body; Be equipped with valve handle on each spool, valve handle is with pressure adjusting spring outward; The control lever shaft that contacts and control the valve handle action with valve handle is installed in the top of valve body, and two pedals of transmission control lever shaft action are separately positioned on the both sides of valve body, and two pedals are connected with the end of control lever shaft by the arm plate respectively; All-in-one-piece dust-proof cover connecting cover covers on the top of valve body and with control lever shaft.
The height of above-mentioned valve body is 0.7～0.8 times of existing valve body height.
The length of above-mentioned valve handle is 0.7～0.8 times of existing valve handle length, and the length of pressure adjusting spring is 22～27mm.
The optimum length of above-mentioned pressure adjusting spring is 24.8mm.
Owing to adopted technique scheme, the control lever shaft that the utility model will contact and control valve handle action with valve handle is installed in the top of valve body, two pedals of transmission control lever shaft action are separately positioned on the both sides of valve body, and two pedals are connected with the end of control lever shaft by the arm plate respectively, four spools can be installed on the same valve body by this set, significantly reduce the volume of whole four tunnel foot-operated pilot valves; And the utility model adopts an all-in-one-piece dust-proof cover connecting cover to cover on the top of valve body and with control lever shaft, and this structure can prevent effectively that dust from entering into valve inner.Existing four tunnel foot-operated pilot valves are the four tunnel foot-operated pilot valves that are combined into by the two-way pilot valve, and overall volume is big, has taken bigger installing space in construction machinery hydraulic system, bothers very much during maintenance.Do not have comparatively ideal proofing dust and protecting measure in addition, the Yi Fashengyin dust infiltrates and makes faults such as valve body leakage of oil or spool be stuck.The utility model designs four road pilot valves in a valve body, and make the length L=32mm of existing pressure adjusting spring foreshorten to L=22～27mm, to have the also corresponding shortening of the valve handle on the spool in the pilot valve simultaneously now, do not influencing under the pilot valve function of use situation, shorten pressure adjusting spring length to greatest extent, make the height dimension of valve body reduce about 20～30%, four tunnel foot-operated pilot valve overall volumes behind the remodeling spool reduce, also can save pilot valve shared space when construction machinery hydraulic system is installed, be convenient to safeguard.Because body size of the present utility model is less, only economical with materials is one, and the valve body of promptly comparable existing four tunnel foot-operated pilot valves is saved cost of material approximately: about 8.00 yuan.The utility model also is provided with all-in-one-piece dust-proof cover on valve body in addition, can effectively avoid dust to enter in the gap of valve body and spool from the joint, avoid four tunnel foot-operated pilot valves faults such as leakage of oil or rotary spool be stuck, the working life of having improved four tunnel foot-operated pilot valves greatly to occur.Adopt the utility model can improve the engineering machinery utilization efficiency and also can bring good economic benefit.Because the utility model adopts the minor pressing spring to dwindle body size, pressure adjusting spring is also to guarantee the stable of spring work delivery pressure.Satisfy four tunnel foot-operated pilot valves and manipulate the accurate control of process at construction machinery hydraulic system.The stability of four tunnel foot-operated pilot valves also is improved by force.Therefore, the utility model compared with prior art, thereby the utility model not only have volume little, be convenient to safeguard, good dustproof effect, and the advantage that can effectively stop dust to infiltrate to prevent in the valve body faults such as leakage of oil or spool be stuck from occurring, but also have fabricating cost low, take advantages such as space in the construction machinery hydraulic system is little, long service life, reliable working performance.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the structural representation of the utility model spool;
Fig. 4 is the structural representation of existing spool.
Being labeled as in the accompanying drawing: 1-valve body, 2-spool, 3-valve handle, 4-pressure adjusting spring, 5-control lever shaft, 6-arm plate, 7-pedal, 8-dust-proof cover.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples, but not as to any restriction of the present utility model.
Embodiment of the present utility model: of the present utility model a kind of four tunnel foot-operated pilot valve structural representations such as Fig. 1～shown in Figure 3, of the present utility model four tunnel foot-operated pilot valves comprise valve body 1, during making, valve body 1 is made into an all-in-one-piece structure, valve body 1 can adopt the QT500-7 ductile cast iron material to make, and the height of valve body 1 is made as 0.7～0.8 times of existing valve body height; Install four spools 2 then in this all-in-one-piece valve body 1, and be equipped with valve handle 3 by existing mode on each spool 2, the length of valve handle 3 is made as 0.7～0.8 times of existing valve handle length L; Be with pressure adjusting spring 4 outside valve handle 3, the length of pressure adjusting spring 4 can be controlled at the scope of 22～27mm, the optimum length of its pressure adjusting spring 4 is 24.8mm; During making, to be installed in the top of valve body 1 with the control lever shaft 5 that valve handle 3 contacted and controlled valve handle 3 action, two pedals 7 of transmission control lever shaft 5 action are separately positioned on the both sides of valve body 1, and these two pedals 7 are connected with the end of control lever shaft 5 by arm plate 6 respectively; Then an all-in-one-piece dust-proof cover 8 is connected and cover top, it can all be covered in the whole upper-end surface of control lever shaft 5 and valve body 1 at valve body 1.
Implementation process of the present utility model and principle are as follows:
The utility model is the improvement to existing four tunnel foot-operated pilot valves as shown in Figure 1, existing four tunnel foot-operated pilot valves, be the four tunnel foot-operated pilot valves that are combined into by the two-way pilot valve, overall volume is big, has taken bigger installing space in construction machinery hydraulic system, bothers very much during maintenance.Do not have comparatively ideal proofing dust and protecting measure in addition, the Yi Fashengyin dust infiltrates and makes faults such as valve body leakage of oil or spool be stuck.The utility model is that existing spool is improved, valve handle 3 as shown in Figure 3 and Figure 4, extremely have valve handle 3 shorten lengths of existing spool 0.7～0.8 of spool length now, the length that is enclosed within the pressure adjusting spring 4 of spool valve handle part simultaneously also foreshortens to 24.8mm by original 32mm, do not influencing under the pilot valve function of use situation, shorten pressure adjusting spring length to greatest extent, to guarantee the stable of spring work delivery pressure.Satisfy four tunnel foot-operated pilot valves and manipulate the accurate control of process at construction machinery hydraulic system.The height of valve body 1 also can be reduced to 0.7～0.8 of existing valve body height.Because the overall length of spool has shortened, the valve body that the height dimension of valve body also can reduce by 20～30%, existing four tunnel foot-operated pilot valves uses material to be QT500-7 spheroidal graphite cast iron precision casting part usually, and the direct like this cost of material of saving is about: 8.00 yuan.The foot-operated pilot valve overall volumes of remodeling four tunnel behind spool reduce, and also can save pilot valve shared space when construction machinery hydraulic system is installed, are convenient to maintenance.Simultaneously the utility model also is provided with dust-proof cover 8 on valve body 1, can avoid dust to enter in the gap of valve body and spool from the joint, avoids four the tunnel to ride pilot valves and faults such as leakage of oil or rotary spool be stuck occur.Improved the working life of four tunnel foot-operated pilot valves.The engineering machinery utilization efficiency can be improved and good business efficiency can be brought.
Claims (3)
1. a foot-operated pilot valve comprises valve body (1), is provided with four spools (2) in the valve body (1); Be equipped with valve handle (3) on each spool (2), the outer pressure adjusting spring (4) that is with of valve handle (3); It is characterized in that: be installed in the top of valve body (1) with the control lever shaft (5) that valve handle (3) contacted and controlled valve handle (3) action, two pedals (7) of transmission control lever shaft (5) action are separately positioned on the both sides of valve body (1), and two pedals (7) are connected with the end of control lever shaft (5) by arm plate (6) respectively; All-in-one-piece dust-proof cover (8) connecting cover covers on the top of valve body (1) and with control lever shaft (5).
2. according to claim 1 described four tunnel foot-operated pilot valves, it is characterized in that: the length of pressure adjusting spring (4) is 22～27mm.
3. according to claim 2 described four tunnel foot-operated pilot valves, it is characterized in that: the length of described pressure adjusting spring (4) is 24.8mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200965482U CN201991859U (en) | 2011-04-06 | 2011-04-06 | Four-path pedal pilot valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200965482U CN201991859U (en) | 2011-04-06 | 2011-04-06 | Four-path pedal pilot valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201991859U true CN201991859U (en) | 2011-09-28 |
Family
ID=44668348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200965482U Expired - Fee Related CN201991859U (en) | 2011-04-06 | 2011-04-06 | Four-path pedal pilot valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201991859U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256270A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Pedal pilot valve |
| CN103256269A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Manual pilot valve and spool thereof |
-
2011
- 2011-04-06 CN CN2011200965482U patent/CN201991859U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103256270A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Pedal pilot valve |
| CN103256269A (en) * | 2013-05-24 | 2013-08-21 | 平原机器厂（新乡） | Manual pilot valve and spool thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110928 Termination date: 20130406 |