CN204312792U - A kind of position limit switch - Google Patents
A kind of position limit switch Download PDFInfo
- Publication number
- CN204312792U CN204312792U CN201420657766.2U CN201420657766U CN204312792U CN 204312792 U CN204312792 U CN 204312792U CN 201420657766 U CN201420657766 U CN 201420657766U CN 204312792 U CN204312792 U CN 204312792U
- Authority
- CN
- China
- Prior art keywords
- via hole
- valve body
- described valve
- limit switch
- position limit
- 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.)
- Expired - Fee Related
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Abstract
A kind of position limit switch, comprising: valve body and stretch into the valve gap of band cavity in described valve body.Described valve body is threaded with described valve gap.Described valve body comprises: convex traveller and be enclosed within valve pocket, the first via hole, the second via hole, the 3rd via hole, orifice plug, the damping hole of described convex traveller outside.Described first via hole is arranged on described valve pocket top middle portion and is connected with described valve body top.Described second via hole is separately positioned on the relative sidewall of described valve body with described 3rd via hole; And described second via hole is communicated with described sleeve side wall by described orifice plug; Described 3rd via hole is connected with described valve pocket by described damping hole.Its advantage is: the phenomenon automatically avoiding leakage loss in signal oil while of repairing, keeps the constant of signal oil, lengthens working hours, concrete pumping system is normally run; Meanwhile, increase peformance margin, improve workmanship.
Description
Technical field
The utility model relates to control switch technical field, specifically a kind of position limit switch.
Background technique
" repairing " mode that in construction, concrete pump is conventional has two kinds of structure types, is divided into automatic repairing and manual repairing.Automatic repairing is generally applicable to automatical control system; Manual repairing is then added the elements such as relief valve and forms by hand stop valve.But the phenomenon of interior leakage loss often can occur in automatic repairing, and now, if repairing not in time, the stroke of master cylinder can shorten, thus affects pumping work.So, develop that a kind of automatic repairing is timely, the position limit switch of the oily flow speed stability of signal is current problem demanding prompt solution.
Model utility content
The purpose of this utility model is that a kind of repairing automatically of design is timely, and makes a kind of position limit switch of signal oil constant flow rate.
A kind of position limit switch, comprising: valve body and stretch into the valve gap of band cavity in described valve body.Described valve body is threaded with described valve gap.Described valve body comprises: convex traveller and be enclosed within valve pocket, the first via hole, the second via hole, the 3rd via hole, orifice plug, the damping hole of described convex traveller outside.Described first via hole is arranged on described valve pocket top middle portion and is connected with described valve body top.Described second via hole is separately positioned on the relative sidewall of described valve body with described 3rd via hole; And described second via hole is communicated with described sleeve side wall by described orifice plug; Described 3rd via hole is connected with described valve pocket by described damping hole.
The advantage of a kind of position limit switch of the utility model is: the phenomenon automatically avoiding leakage loss in signal oil while of repairing, keeps the constant of signal oil, lengthens working hours, concrete pumping system is normally run; Meanwhile, increase peformance margin, improve workmanship.
Accompanying drawing explanation
fig. 1 is liquid controlled reversing device structural representation.
Embodiment
According to Fig. 1, a kind of position limit switch, comprising: valve body 10 and stretch into the valve gap 20 of band cavity in described valve body 10.Described valve body 10 is threaded with described valve gap 20.
Described valve body 10 comprises: convex traveller 11 and be enclosed within valve pocket 12, first via hole 13, second via hole 14, the 3rd via hole 15, orifice plug 16, the damping hole 17 of described convex traveller 11 outside.Described first via hole 13 is arranged on described valve pocket 12 top middle portion and is connected with described valve body 10 top.Described second via hole 14 and described 3rd via hole 15 are separately positioned on the relative sidewall of described valve body 10, and described second via hole 14 and described 3rd via hole 15 be not on one article of horizontal line; And described second via hole 14 is communicated with described valve pocket 12 sidewall by described orifice plug 16; Described 3rd via hole 15 is connected with described valve pocket 12 by described damping hole 17.Described 3rd via hole 15 is arranged on the position that described valve gap 20 spins with described valve pocket 12.
The spring 22 spring seat 21 being set in described valve gap 20 and being fixed on described spring seat 21.
Described valve pocket 12 is tightly connected by Sealing 30 and described valve body 10 herein.
Described valve body 10 adopts carbon structural steel material to make herein.
Described valve pocket 12 and described convex traveller 11 all adopt high-carbon-chromium bearing steel material to make herein, and its alloy content is less, have superperformance.
Described spring 22 adopts carbon spring steel wires to make herein.
Described orifice plug 16 can control the flow velocity of signal oil herein, and flow pressure-difference is changed level and smooth, internal leakage is little, Torque-adjusting is little, is active in one's movements.
Described second via hole 14 is arranged on the neutral position of described valve body 10 sidewall herein.
Described damping hole 17 can control the speed of signal oil circulation herein.
Herein during pressure testing: when described second via hole 14, described 3rd via hole 15 open wide, it is 15 ~ 25L/min that described first via hole 13 crosses oily flow; When described first via hole 13 opens wide with described 3rd via hole 15, described second via hole 14 communication oil, cracking pressure is 1.2MPa; When described first via hole 13 shutoff, described second via hole 14 opens wide, and when described 3rd via hole 15 communication is number oily, when boosting to 15 MPa, leakage rate should be not more than 5 ml/min; Pressure is kept not have outer seepage when being then pressed onto 35 MPa; When described 3rd via hole 15 shutoff, described first via hole 13 boost 19 ~ 21 MPa time, described second via hole 14 leakage rate should be not more than 10 ml/min.
A kind of position limit switch of the utility model is achieved in that when signal oil enters from described first via hole 13, enter described convex traveller 11 top, oil pressure in valve body 10 raises, simultaneously because of the effect of the inner described damping hole 17 of described convex traveller 11, the elastic force that signal oil overcomes spring 22 described in described convex traveller 11 bottom makes described convex traveller 11 at the uniform velocity move down, described 3rd via hole 15 is closed, alleviate the impacting with high pressure in valve body 10, described orifice plug 16 moves, and signal oil flows out from described second via hole 14.Now, described convex traveller 11 continues to move down, when the signal oil pressure in position limit switch is too low, due to the reaction force of described spring 22, and the effect of the damping hole 17 of described convex traveller 11 inside, promote described convex traveller 11 at the uniform velocity on move, described second via hole 14 is closed, signal oil flows out from described 3rd via hole 15 through the described damping hole 17 be connected with described valve pocket 12, reaches the effect of automatic repairing.
The advantage of a kind of position limit switch of the utility model is: the phenomenon automatically avoiding leakage loss in signal oil while of repairing, keeps the constant of signal oil, lengthens working hours, concrete pumping system is normally run; Meanwhile, increase peformance margin, improve workmanship.
The above is all within spirit of the present utility model and principle not in order to limit the utility model, and any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (5)
1. a position limit switch, comprising: valve body and stretch into the valve gap of band cavity in described valve body, and described valve body is threaded with described valve gap; Described valve body comprises: convex traveller and be enclosed within valve pocket, the first via hole, the second via hole, the 3rd via hole, the orifice plug of described convex traveller outside; Described first via hole is arranged on described valve pocket top middle portion and is connected with described valve body top; Described second via hole is separately positioned on the relative sidewall of described valve body with described 3rd via hole; And described second via hole is communicated with described sleeve side wall by described orifice plug; Described 3rd via hole is connected with described valve pocket by damping hole.
2. a kind of position limit switch according to claim 1, is characterized in that: the spring arranging spring seat in described valve gap and be fixed on described spring seat.
3. a kind of position limit switch according to claim 1, is characterized in that: described second via hole is arranged on the neutral position of described body wall.
4. a kind of position limit switch according to claim 1, is characterized in that: described 3rd via hole is arranged on the position that described valve gap and described valve pocket spin.
5. a kind of position limit switch according to claim 1, is characterized in that: described second via hole and described 3rd via hole be not on one article of horizontal line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657766.2U CN204312792U (en) | 2014-11-06 | 2014-11-06 | A kind of position limit switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420657766.2U CN204312792U (en) | 2014-11-06 | 2014-11-06 | A kind of position limit switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204312792U true CN204312792U (en) | 2015-05-06 |
Family
ID=53135110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420657766.2U Expired - Fee Related CN204312792U (en) | 2014-11-06 | 2014-11-06 | A kind of position limit switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204312792U (en) |
-
2014
- 2014-11-06 CN CN201420657766.2U patent/CN204312792U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20161106 |