CN209261969U - A kind of level pressure signalling generator - Google Patents

Abstract

The utility model discloses a kind of level pressure signalling generators, are related to engineering machinery field, which is successfully realized the miniaturization of signalling generator under the premise of meeting system use, and structure is simple, high reliablity, at low cost, precision is high.The level pressure signalling generator includes lower valve body, connector and close switch, is equipped with a small piston inside lower valve body, wherein small piston and the tight fit of lower valve body piston hole；There is a mandril in connector, wherein mandril and connector jogger hole are fitted close, described mandril one end is provided with cylindrical spring seat, a spring is fixedly mounted on the cylindrical spring seat, it is described to be located between mandril and close switch close to inductive switching area there are also one close to inductive switching area in the connector；Wherein there is an action indicator close to switch tail portion.Above-mentioned technical proposal has used close switch, alarm pressure not only can be improved, but also precision can be improved.

Description

A kind of level pressure signalling generator

Technical field

The utility model relates to engineering machinery fields, and in particular to a kind of level pressure signalling generator.

Technical background

In grease lubricating system, the intelligence degree of grease lubricating system, signalling generator is can be improved in the use of signalling generator The pressure of lubrication bye-pass can be measured in real time, such as occur pipeline leakage, loine pressure lower than setting pressure feelings Signalling generator energy and alarm when condition, some equipment lubrication bye-passes are more and compare concentration, therefore require signalling generator as far as possible Miniaturization, and it is cheap.

Currently, the volume of conventional mechanical type pressing force controller is larger, and sender pressure value adjustable extent is smaller, because This conventional mechanical type pressing force controller is lower and when sender pressure is higher is all unable to satisfy substantially in sender pressure；And electronic type Pressure controller volume it is relatively small, adjustable pressure limit is also bigger, but it is expensive, cannot achieve commercialization.

Chinese patent CN2210274Y discloses a kind of pressure transmitter with shell, electric shock switch, in its call-sending cavity Spool is inside set, sets push rod on spool inner face, sealing ring is housed on spool.Pressure oil acts on push rod, is provided on push rod Contact switch.When push rod is pushed into a certain degree by pressure oil, push rod can trigger contact switch, to realize alarm.Pressure hair The alarm pressure for interrogating device is small, cannot bear very high pressure, so that the occasion that pressure transmitter can be applied is limited, uses Narrow range.

Chinese patent CN204099341U discloses a kind of pressure transmitter, which includes pedestal, connector And alarm switch, the first cavity is provided on pedestal, and the second cavity is provided on connector, pedestal is fixedly connected with connector, First cavity and the second cavity are sealed and connected；Be additionally provided with fuel feed hole on pedestal, fuel feed hole be located at the lower section of the first cavity and It is connected to the first cavity；Wherein, the lever being provided in the first cavity above fuel feed hole, one end of lever and the first cavity Inner wall be pivotally connected or hinged, the other end of lever is provided with compressed spring；The first contact of alarm switch is provided with above lever, The second contact of alarm switch is provided in second cavity, the first contact and the second contact are oppositely arranged, when push rod is by pressure oil It is pushed into a certain degree, push rod will push lever, so that compressed spring be made to compress, the first contact and the contact of the second contact are to realize Alarm.The pressure mode seeks to be that physics is needed directly to contact, and achievees the purpose that control switch, and physics directly contacts, because of touching Point and structural principle, use switch type of switch substantially can only be low current, the low switch of voltage, the scope of application is poor. In the actual operation process, if some mechanical part is mobile, very big error can be generated.

Utility model content

The utility model is to solve the above problems, devise a kind of level pressure signalling generator, for expanding the use model of signalling generator It encloses, reduces the volume of signalling generator, reduce the price of signalling generator.

To achieve the above object, the utility model provides technical solution:

The utility model provides a kind of level pressure signalling generator, is mainly made of lower valve body, connector and sender switch, this reality It is fixedly connected in the same horizontal line with novel lower valve body, connector with close to switch, innovative point is: the utility model Sender switch for close to switch, there is a cavity a in the end of the lower valve body of the utility model, sets in the cavity a of the utility model There is internal screw thread, the front end of the connector of the utility model is equipped with external screw thread, and lower valve body and connector are connected through a screw thread, this is practical There is a cavity b in the end of novel connector, is equipped with internal screw thread, the connector of the utility model in the cavity b of the utility model It is connected with close to the front end of switch by locking nut.

Further, there are a small piston, the small piston and lower valve body of the utility model inside the lower valve body of the utility model Piston hole is fitted close.

Further, there are a mandril, the mandril and connector jogger hole of the utility model in the connector of the utility model It is fitted close, mandril one end of the utility model is provided with cylindrical spring seat, consolidates on the cylindrical spring seat of the utility model Dingan County fills a spring, and there are also one in the connector of the utility model close to inductive switching area, the utility model close to switch sense Area is answered to be located at mandril and close between switch.

Further, seal groove is offered in the lower valve body of the utility model, sealing ring is mounted in seal groove.

Further, the spring of the utility model is installed between connector and mandril, the spring base of the utility model Outer circle is greater than signalling generator and pacifies spring-loaded counter bore hole diameters.

Further, it is normally closed etc. that AV220 & DC24 or normally opened & may be selected in the sender mode of the signalling generator of utility model A variety of sender modes.

Further, the utility model close to inductive switching area range be 0.5mm ~ 10cm.

The advantages of the utility model:

1. the level pressure signalling generator of the utility model is applicable in pressure height, drier oil system highest nominal pressure 40Mpa may be up to, by It is to approach switch in the switch of the utility model application, switch can bear high current, and high voltage 220V/380V adapts to user A variety of needs.

2. the level pressure signalling generator of the utility model is compact-sized small in size, and on-fixed connects between each components, institute There is component that can be replaced according to live actual condition easy removal, conventional pressure transmitter, if wanting high voltage 220V/ 380V, analog quantity 4-20Ma signal output, is bound to be made into very big structure, the utility model level pressure signalling generator.

3. the level pressure signalling generator use of the utility model is close to switch control signalling generator sender, close to switch woth no need to reality Distance of reaction sender is leaned in contact, and distance of reaction is adjustable, and switch can need to select plurality of specifications electric according to system electrical Source, normally opened, a variety of sender modes such as normally closed, satisfiable demand.

4. the working principle close to switch that the level pressure signalling generator of the utility model uses is, close to switch without directly connecing Touching, achievees the purpose that control switch on-off using to the sensitivity characteristic close to object, traditional pressure transmitter is all desirable Physics directly contacts, during actual use, if slightly component moves 0.5mm or so, equipment is difficult judgement and screens, therefore Measure inaccurate, error is big, and the level pressure signalling generator of the utility model is because without directly contacting, there is no error, In practical application, 0.5 ~ 1mm of moving distance is sensed, switch with regard to sender, accuracy is high.

Detailed description of the invention

Attached drawing described herein is used to provide a further understanding of the present invention, and is constituted part of this application, The exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the improper of the utility model It limits, in the accompanying drawings:

Fig. 1 is the cross-sectional view of the utility model level pressure signalling generator original state；

Fig. 2 is utility model level pressure signalling generator lower valve body structural schematic diagram；

Fig. 3 is utility model level pressure signalling generator connecting-piece structure schematic diagram；

Fig. 4 is utility model level pressure signalling generator close to switch structure diagram；

Fig. 5 is the cross-sectional view of the utility model level pressure signalling generator sender state.

1- action indicator；The close switch of 2-；3- locking nut；4- connector；5- spring；6- mandril；7- lower valve body；8- Sealing ring；9- small piston；10- spring base；11- induction zone；12- cavity b；13 locking nut external screw threads, the outer spiral shell of 14- connector Line, 15- cavity a.

Specific embodiment

Below with reference to Fig. 1 ~ 5, technical scheme provided by the present invention will be described in more detail, will be originally practical new Type provide any technological means be replaced or will it is provided by the utility model arbitrarily two or more technological means or Technical solution obtained from technical characteristic is combined with each other should be within the protection scope of the utility model.

The cross-sectional view of level pressure signalling generator original state as shown in Figure 1, the level pressure signalling generator is mainly by lower valve body 7, connection Part 4 and close to 2 three parts of switch constitute, wherein lower valve body 7, connector 4 and approach switch 2 in the same horizontal line, wherein under Valve body 7 and connector 4 are connected through a screw thread, and wherein connector 4 and close switch 2 are connected by locking nut 3, the level pressure sender On-fixed connects between each components of device, and all components can be replaced according to live actual condition easy removal.

There is a small piston 9 inside lower valve body 7 as shown in Figure 2, wherein small piston 9 and 7 piston hole of lower valve body are fitted close, Seal groove is offered in the lower valve body of the utility model, sealing ring 8 is mounted in seal groove, which can prevent small Micro oil leak between piston 9 and piston hole enters epicoele, and there are a cavity 15, cavity a15 in the junction of lower valve body 7 and connector 4 It is interior to be equipped with internal screw thread.

Connector 4 as shown in Figure 3 is equipped with connector external screw thread 14 in 7 junction of lower valve body, for connecting lower valve body 7, There is a mandril 6 in connector 4, wherein mandril 6 and 4 jogger hole of connector are fitted close, and described 6 one end of mandril is provided with cylindrical type Spring base 10, is fixedly mounted a spring 5 on the cylindrical spring seat 10, the spring 5 of the utility model be installed on connector 4 with Between mandril 6, the outer circle of 5, the spring is greater than the counter bore hole diameters of connector installation spring 5, and the connector 4 is interior, and there are also one Close to inductive switching area 11, which is located at mandril 6 close to inductive switching area 11 and close between switch 2, feels close to switch Answering 11 range of area is 0.5mm ~ 10cm, and connector 4 has a cavity b12 with the junction close to switch 2, which connects Nearly switch 2 achievees the purpose that control switch on-off, traditional pressure using to the sensitivity characteristic close to object without directly contacting Power signalling generator is all that physics is needed directly to contact, during actual use, if slightly component moves 0.5mm or so, equipment Be difficult judgement to screen, therefore measure inaccurate, error is big, the level pressure signalling generator of the utility model because without directly contact, So error is not present, in practical applications, senses 0.5 ~ 1mm of moving distance, switch with regard to sender, accuracy is high.

It is as shown in Figure 4 close to switch 2, head have a locking nut external screw thread 13 for connect close to switch 2 with connect There are an action indicator 1 in part 4, tail portion, and level pressure signalling generator can select AV220 & DC24 or normally opened & normally closed close to switch 2 One kind, the level pressure signalling generator use of the utility model actually connects close to switch control signalling generator sender close to switch 2 Distance of reaction sender is leaned in touching, and distance of reaction is adjustable, and switch can need to select plurality of specifications electric according to system electrical Source, normally opened, a variety of sender modes such as normally closed, satisfiable demand.

Level pressure signalling generator sender state as shown in Figure 5, when pressure oil pushes small piston 9 to move to 4 direction of connector, Small piston 9 pushes the mandril 6 one in connector 4 to move in the same direction close to 2 direction of switch at this time, at this time the compression bullet in connector 4 Spring 5 is further compressed, and when 6 spring base 10 of mandril is with 4 right end face contact of connector, mandril 6 will not move (oil inlet pressure again Power further increases, and mandril will not move again), 6 left side of mandril enters proximal to the induction zone 11 of switch at this time, close to switch 2 Sender, action indicator 1 light.When input pressure is less than setting sender value, mandril 6 is driven small under the action of 5 power of spring Lower valve body direction moves piston 0 together, and 6 left side of mandril is detached from the induction zone 11 close to switch 2, disconnects close to 2 signal of switch, Action indicator 1 extinguishes.

Different sender pressure can be obtained, as long as level pressure signalling generator by replacing different springs 5 in the utility model Input pressure reaches preset pressure i.e. sender, has mechanical position limitation, input pressure reaches 40MPa(drier oil system most after sender High nominal pressure) signalling generator will not be damaged.

Claims (7)

1. a kind of level pressure signalling generator, mainly it is made of, the lower valve body, connector and connects lower valve body, connector and sender switch Nearly switch is fixedly connected in the same horizontal line, it is characterised in that: the sender switch is close switch, the end of the lower valve body End, which has, is equipped with internal screw thread in cavity an a, the cavity a, the front end of the connector is equipped with external screw thread, and lower valve body and connector are logical Cross threaded connection, the end of the connector, which has, is equipped with internal screw thread in cavity a b, the cavity b, the connector and close to opening The front end of pass is connected by locking nut.

2. a kind of level pressure signalling generator according to claim 1, it is characterised in that: there is a small piston inside the lower valve body, The small piston and lower valve body piston hole are fitted close.

3. a kind of level pressure signalling generator according to claim 1, it is characterised in that: there is a mandril in the connector, it is described Mandril and connector jogger hole are fitted close, and described mandril one end is provided with cylindrical spring seat, on the cylindrical spring seat Be fixedly mounted a spring, there are also one in the connector close to inductive switching area, it is described close to inductive switching area be located at mandril with Close between switch.

4. a kind of level pressure signalling generator according to claim 1, it is characterised in that: offer sealing ring in the lower valve body Slot, sealing ring are mounted in seal groove.

5. a kind of level pressure signalling generator according to claim 3, it is characterised in that: the spring is installed on connector and mandril Between, the outer circle of the spring base is greater than signalling generator and pacifies spring-loaded counter bore hole diameters.

6. a kind of level pressure signalling generator according to claim 1, it is characterised in that: the sender mode of the signalling generator may be selected A variety of sender modes such as AV220&DC24 or normally opened & are normally closed.

7. a kind of level pressure signalling generator according to claim 1, it is characterised in that: described to be close to inductive switching area range 0.5mm~10cm.