CN201112274Y - Low pressure type pressure relay - Google Patents
Low pressure type pressure relay Download PDFInfo
- Publication number
- CN201112274Y CN201112274Y CNU2007201735585U CN200720173558U CN201112274Y CN 201112274 Y CN201112274 Y CN 201112274Y CN U2007201735585 U CNU2007201735585 U CN U2007201735585U CN 200720173558 U CN200720173558 U CN 200720173558U CN 201112274 Y CN201112274 Y CN 201112274Y
- Authority
- CN
- China
- Prior art keywords
- steel ball
- ball bearing
- piston
- posting
- letter
- 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 - Lifetime
Links
Images
Landscapes
- Switches Operated By Changes In Physical Conditions (AREA)
Abstract
The utility model discloses a low pressure type pressure relay which comprises a shell body and a hydraulic drive device; the hydraulic drive device is composed of an end cover, a piston and a push rod; the piston is positioned in the shell body; one end of the piston is connected with the push rod; the low pressure type pressure relay further comprises a sealing diaphragm, a signal point adjusting device, a steel ball bracket and an electrical signal converting and transmitting device; the sealing diaphragm is positioned between a pressure oil hole and the piston; the other end of the push rod is connected with the steel ball bracket; the signal point adjusting device contacts the other end of the steel ball bracket; the electrical signal converting and transmitting device is composed of a microswitch, an aircraft plug, conductors and a sealing cover; contacts of the microswitch contact the end surface of the steel ball bracket at the push-rod side; the aircraft plug is arranged at the sealing cover and is interconnected with the microswitch through conductors; the low pressure type pressure relay has simple structure, low cost, high sensitivity, and is beneficial to realizing the axial tubing and the radial tubing as well as the plate type connection, and can change the materials of the end cover and the shell body, thus being applicable to different media.
Description
Technical field
The utility model relates to automatic field, especially the liquid of low oil pressure-electrical signal conversion field.
Background technology
Pressure switch is the conversion equipment of a kind of hydraulic pressure and electric signal, mainly is divided into two types at present, one is mechanical, and one is electronic type.Mechanical compression relay cost is low, properly can satisfy most of industrial requirements substantially if design, but, mechanical problem is not have (the referring to below the 0.3Mpa) of low-pressure type, though it is some product nominal minimum pressure as German BOSCH-REXROTH and Taiwan and other places can reach 0.3Mpa, actual extremely unstable when this pressure uses; Electronic pressure relay precision height, but cost is high more a lot of than mechanical type is so except occasion that non-usefulness, general many employings are mechanical.
At present at home and abroad in the guide rail lubricating system in cylindrical grinder field because of hypotony (≤0.05Mpa) generally all be difficult for realizing monitoring, in case and oil supply system goes wrong because no monitoring, alarming will cause the wound of grinding of track.Along with the development of Digit Control Machine Tool, the lubricated reliability of machine tool guideway becomes important all the more, Gu this, how to solve this difficult problem and just puts on the agenda.
The utility model content
It is a kind of simple in structure, with low cost, highly sensitive that the purpose of this utility model is to provide, the multifarious low-pressure type pressure switch of use occasion.
In order to achieve the above object, the technical solution of the utility model is achieved in that a kind of low-pressure type pressure switch, comprise housing and fluid pressure drive device, described fluid pressure drive device is by end cap, piston and push rod constitute, described piston is arranged in housing, one end of piston is connected with push rod, also comprise seal dissepiment, an adjusting device of posting a letter, steel ball bearing and electrical signal conversion and transmitting device, described seal dissepiment is between pressure oilhole and piston, the other end of described push rod connects the steel ball bearing, a described adjusting device of posting a letter contacts with the other end of steel ball bearing, described electrical signal conversion and transmitting device are by sensitive switch, aviation plug, lead and seal closure are formed, the contact of sensitive switch contacts with the end face that is positioned at push rod one side of steel ball bearing, and aviation plug is arranged on the seal closure and by lead and links to each other with sensitive switch.
A described adjusting device of posting a letter is by spring, spring fastening, steel ball, the steel ball bearing of an adjusting device of posting a letter, adjusting knob and locking nut are formed, described spring fastening is two, between two spring fastening medial surfaces, be provided with spring, two spring fastening outsides connect the steel ball bearing respectively and the steel ball bearing of an adjusting device of posting a letter, be respectively arranged with a steel ball between the respective steel tumbler bearing in described each spring fastening and its outside, the other end of the steel ball bearing of a described adjusting device of posting a letter is located in the adjusting knob body, spring, spring fastening, steel ball, the steel ball bearing and the adjusting knob of an adjusting device of posting a letter all are positioned at housing.
Beneficial effect after the employing technique scheme is: in low-pressure type pressure switch of the present utility model, is not difficult to part that process or high-precision, adopts common common apparatus to process, and therefore simple in structure, with low cost; The minimum pressure of posting a letter of the present utility model is 0.025Mpa, and the actual pressure that uses is 0.04-0.06Mpa, when pressure changes 0.02Mpa, can send switching signal, it than the pressure of posting a letter of the like product of selling in the market almost low order of magnitude and sensitivity higher; Can realize axial pipe arrangement, radially pipe arrangement and board-like connection as long as change the version of end cap (being pressure oilhole place part) simultaneously; In addition, change end cap and housing (being the part that piston and seal dissepiment are located in) into stainless steel, promptly can be used for mordant medium or water.
Description of drawings
Fig. 1 is the generalized section of the utility model low-pressure type pressure switch.
Wherein, 1 pressure oilhole, 2 end caps, 3 seal dissepiments, 4 pistons, 5 housings, 6 push rods, 7 seal closures, 8 leads, 9 sensitive switches, 10 steel ball bearings, 11 steel balls, 12 spring fastenings, 13 springs, 14 aviation plugs, 15 locking nuts, 16 steel ball bearing, 17 adjusting knobs of an adjusting device of posting a letter.
The utility model is described in further detail below in conjunction with accompanying drawing.
Embodiment
As shown in Figure 1, a kind of low-pressure type pressure switch, comprise housing 5 and fluid pressure drive device, described fluid pressure drive device is by end cap 2, piston 4 and push rod 6 constitute, piston 4 is arranged in housing 5, the other end of piston 4 is connected with push rod 6, also comprise seal dissepiment 3, an adjusting device of posting a letter, steel ball bearing 10 and electrical signal conversion and transmitting device, seal dissepiment 3 is between pressure oilhole 1 and piston 4, the other end of push rod 6 connects steel ball bearing 10, a described adjusting device of posting a letter contacts with the other end of steel ball bearing 10, described electrical signal conversion and transmitting device are by sensitive switch 9, aviation plug 14, lead 8 and seal closure 7 are formed, the contact of sensitive switch 9 contacts with the end face that is positioned at push rod 6 one sides of steel ball bearing 10, and aviation plug 14 is arranged on the seal closure 7 and by lead 8 and links to each other with sensitive switch 9.
A described adjusting device of posting a letter is by spring 13, spring fastening 12, steel ball 11, the steel ball bearing 16 of an adjusting device of posting a letter, locking nut 15 and adjusting knob 17 are formed, spring fastening 12 is two, between two spring fastening 12 medial surfaces, be provided with spring 13, two spring fastening 12 outsides are respectively equipped with the steel ball bearing 16 of a steel ball bearing 10 and an adjusting device of posting a letter, be respectively arranged with a steel ball 11 between the corresponding steel ball bearing 10 in each spring fastening 12 and its outside and the steel ball bearing 16 of an adjusting device of posting a letter, the other end of the steel ball bearing 16 of an adjusting device of posting a letter is located in adjusting knob 17 bodies, spring 13, spring fastening 12, steel ball 11, the steel ball bearing 16 and the adjusting knob 17 of an adjusting device of posting a letter all are positioned at housing 5.
Position shown in Figure 1 is the state that pressure does not reach preset value, the pressure oilhole 1 of one end of the piston 4 of low-pressure type pressure switch on seal dissepiment 3 and end cap 2 separates, when pressure oil after pressure oilhole 1 enters, make seal dissepiment 3 expand, the active force of seal dissepiment 3 is applied on the piston 4, when pressure meets or exceeds preset value, the thrust that piston 4 overcomes adjusting device medi-spring 13 by the push rod 6 small distance (0.5-1mm) that moves to right, sensitive switch 9 is discharged, thereby send the electric conversion signal; When pressure was lower than preset value, under the effect of adjusting device, push rod 6 and piston 4 all moved to left, and with sensitive switch 9 pressings, thereby sent the electric conversion signal once more.
The key that realizes the low pressure conversion is:
1. will have bigger piston cross-section area to accept low pressure, the coefficient of elasticity of the spring that in addition matches can make push rod produce enough displacements under extremely low oil pressure, thereby makes sensitive switch send switching signal.
2. the motion of piston and push rod will be tried one's best flexibly, so that improve the sensitivity of its conversion.
The utility model adopts mechanical structure, is used for changing the following signal of 0.1Mpa specially, the signal of minimum requirements conversion 0.03Mpa.
The utility model can be realized axial pipe arrangement, radially pipe arrangement and board-like connection as the version that changes end cap (being pressure oilhole place part).
The utility model promptly can be used for mordant medium or water as changing end cap and housing (being the part that piston and seal dissepiment are located in) into stainless steel.
The above only is a preferable enforcement example of the present utility model, is not to be used to limit protection range of the present utility model.
Claims (2)
1. low-pressure type pressure switch, comprise housing and fluid pressure drive device, described fluid pressure drive device is by end cap, piston and push rod constitute, described piston is arranged in housing, one end of piston is connected with push rod, it is characterized in that: also comprise seal dissepiment, an adjusting device of posting a letter, steel ball bearing and electrical signal conversion and transmitting device, described seal dissepiment is between pressure oilhole and piston, the other end of described push rod connects the steel ball bearing, a described adjusting device of posting a letter contacts with the other end of steel ball bearing, described electrical signal conversion and transmitting device are by sensitive switch, aviation plug, lead and seal closure are formed, the contact of sensitive switch contacts with the end face that is positioned at push rod one side of steel ball bearing, and aviation plug is arranged on the seal closure and by lead and links to each other with sensitive switch.
2. low-pressure type pressure switch according to claim 1, it is characterized in that: a described adjusting device of posting a letter is by spring, spring fastening, steel ball, the steel ball bearing of an adjusting device of posting a letter, adjusting knob and locking nut are formed, described spring fastening is two, between two spring fastening medial surfaces, be provided with spring, two spring fastening outsides connect the steel ball bearing respectively and the steel ball bearing of an adjusting device of posting a letter, be respectively arranged with a steel ball between the respective steel tumbler bearing in described each spring fastening and its outside, the other end of the steel ball bearing of a described adjusting device of posting a letter is located in the adjusting knob body, spring, spring fastening, steel ball, the steel ball bearing and the adjusting knob of an adjusting device of posting a letter all are positioned at housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201735585U CN201112274Y (en) | 2007-10-09 | 2007-10-09 | Low pressure type pressure relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201735585U CN201112274Y (en) | 2007-10-09 | 2007-10-09 | Low pressure type pressure relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201112274Y true CN201112274Y (en) | 2008-09-10 |
Family
ID=39964019
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201735585U Expired - Lifetime CN201112274Y (en) | 2007-10-09 | 2007-10-09 | Low pressure type pressure relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201112274Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187204A (en) * | 2011-12-30 | 2013-07-03 | 北京中科信电子装备有限公司 | Device of ultra-low energy relay |
| CN117147164A (en) * | 2023-11-01 | 2023-12-01 | 中国航发沈阳发动机研究所 | Hole detection device for double-layer casing of aero-engine |
-
2007
- 2007-10-09 CN CNU2007201735585U patent/CN201112274Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187204A (en) * | 2011-12-30 | 2013-07-03 | 北京中科信电子装备有限公司 | Device of ultra-low energy relay |
| CN117147164A (en) * | 2023-11-01 | 2023-12-01 | 中国航发沈阳发动机研究所 | Hole detection device for double-layer casing of aero-engine |
| CN117147164B (en) * | 2023-11-01 | 2024-01-30 | 中国航发沈阳发动机研究所 | Hole detection device for double-layer casing of aero-engine |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201112274Y (en) | Low pressure type pressure relay | |
| CN204130875U (en) | A kind of slide contact type safety transmission device | |
| CN219529667U (en) | Flexible joint double-layer plane torsion spring | |
| CN202855633U (en) | Pressure controller | |
| CN218670037U (en) | Hydraulic cylinder with locking mechanism | |
| CN217778594U (en) | Direct-acting diaphragm type overflow valve for gas circuit control system of urban rail vehicle | |
| CN101837653A (en) | Press ball screw rod locking device | |
| CN208655510U (en) | A kind of pressure switch easy to repair | |
| CN215984993U (en) | High-precision contact sensor | |
| CN204747339U (en) | Punch press bent axle rotation angle's monitoring device | |
| CN210061197U (en) | Passive safety impedance mechanism with feedback and damping | |
| CN207765371U (en) | It is a kind of that there is the novel pressure signalling means for bearing superelevation overload for a long time | |
| CN108305814B (en) | Pressure signal device capable of bearing ultrahigh overload for long time | |
| CN220646344U (en) | Plug-in overflow valve | |
| CN219954388U (en) | Erosion-resistant valve body | |
| CN214221988U (en) | Gear shifting servo mechanism | |
| CN213452812U (en) | Plunger type pressure switch | |
| CN220337260U (en) | Intelligent gasket | |
| CN221373544U (en) | Well control throttle valve | |
| CN214661598U (en) | Pin coupling | |
| CN219046000U (en) | Thrust monitoring mechanism of electronic product | |
| CN218094904U (en) | Nuclear power plant uses anticorrosive device of pipeline inner wall | |
| CN117570135A (en) | Parking braking system of main driving speed reducer of shield tunneling machine | |
| CN221260023U (en) | Floating ball type liquid level sensor | |
| CN215596054U (en) | Double-acting rotary oil cylinder |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080910 |