CN208634143U - Pressure measuring tie-in and hydraulic system with degassing function - Google Patents

Abstract

The utility model discloses a kind of pressure measuring tie-ins with degassing function, it is related to technical field of hydraulic pressure, including slide core cavity, fitting body, slide core and spring, shown slide core cavity upper end opening, the fitting body is cylindrical in shape, and is set in the outside of slide core cavity from the top down and is detachably connected；The diminishing sliding channel of upward opening is provided in the slide core cavity, the slide core is slidably arranged in the sliding channel, and the inner wall contact position of the slide core and sliding channel is provided with the liquid sealing ring for allowing gas to pass through；The installation through-hole being connected with sliding channel is provided in the fitting body, the spring is set between slide core and fitting body；The slide core is the diminishing cylinder of upper end diameter, and the arcwall face that the upper end is formed can be gradually reduced the upper cambered surface to be formed with sliding channel opening and match abutting, forms air-tightness connection.Mixed air in oil liquid can timely be discharged, avoid various harm caused by the presence of air, the hidden danger of removal system.

Description

Pressure measuring tie-in and hydraulic system with degassing function

Technical field

The utility model relates to technical field of hydraulic pressure, in particular to a kind of pressure measuring tie-in with degassing function and hydraulic System.

Background technique

Hydraulic system is before use, element and channel interior are full of air.In debugging process, need to carry out relevant row Gas operation, or move executing agency repeatedly, air is discharged from system.

Pressure measuring tie-in is a kind of connector for the sampling of the pressure detecting of hydraulic system, lubrication, exhaust or oil liquid.Current Pressure measuring tie-in is mostly without deflation function, and having the shortcomings that the pressure measuring tie-in of deflation function, there is also bleeding inconveniences, so that There is certain air inside hydraulic system.

Air in hydraulic system mainly has following harm:

1., in the measurement data inaccuracy of pressure tap, influencing subsequent survey since being mixed into for air causes the insensitive of control The distortion of examination analysis work, causes adverse effect to system or Product Status testing and evaluation result；

2. being mixed into of air directly contribute oil liquid elasticity modulus (elasticity modulus refer to material in elastic deformation stage, The ratio of direct stress and corresponding normal strain) decline, influence the control performance of hydraulic system；

3. may cause cavitation, the inner surface of Hydraulic Elements is damaged.Cavitation erosion is also known as cavitation pitting, fluid in flow at high speed and Under the conditions of pressure change, there is a phenomenon where cavernous corrosion failures on the metal surface that contacts with fluid.

Cavitation erosion reason is: gas, bubble can vanish under high pressure effect, and moment releases a large amount of heat, and along with point Sharp sound and strong vibration.Near the metallic walls inside hydraulic system, the high temperature and high pressure meeting of generation Metal peeling is caused, the surface of metallic walls is made to become coarse, even spongiform small cave.

Although pressure measuring tie-in in the prior art with degassing function, needs manually to remove washer when being vented, It is reinstalled again after exhaust, and needs multi-pass operation, operation is more troublesome, and working efficiency is low, is caused in hydraulic system Field adjustable during, many commissioning staffs are not exhausted system according to working specification, and many commissioning staffs can be straight Omission exhaust the step is connect, cavitation is serious, has buried hidden danger, and hydraulic pressure system for the normal reliable operation of hydraulic system System is nor real-time ventilation, during a follow-on test, still will cause the distortion of data acquisition, can not avoid by The insensitive phenomenon of control caused by air is mixed into；Existing pressure measuring tie-in has been seen still in bleeding with operator The oil liquid of foam flows out the mark emptied as air, and oil liquid is caused to be lost, and pollutes environment.

Utility model content

The purpose of this utility model is to provide a kind of pressure measuring tie-in and hydraulic system with degassing function, can be in time Discharge oil liquid in mixed air, avoid various harm caused by the presence of air, the hidden danger of removal system.

The above-mentioned purpose of the utility model has the technical scheme that

A kind of pressure measuring tie-in with degassing function, including slide core cavity, fitting body, slide core and spring, shown slide core Cavity upper end opening, the fitting body are cylindrical in shape, and are set in the outside of slide core cavity from the top down and are detachably connected；The cunning The diminishing sliding channel of upward opening is provided in core cavity body, the slide core is slidably arranged in the sliding channel, institute The inner wall contact position for stating slide core and sliding channel is provided with the liquid sealing ring for allowing gas to pass through；Be provided in the fitting body with The installation through-hole that sliding channel is connected, the spring are set between slide core and fitting body；The slide core be upper end diameter by Tapered small cylinder, the upper end formed arcwall face can with sliding channel be open be gradually reduced the upper cambered surface to be formed match to Tightly, air-tightness connection is formed.

By using above-mentioned technical proposal, the inner wall contact position of slide core and sliding channel is provided with the liquid for allowing gas to pass through Sealing ring, liquid sealing ring can stop oil liquid to discharge by sliding channel and installation through-hole, can stop the leakage of oil liquid, But the gas in hydraulic system then can pass through liquid sealing ring, by sliding channel and installation through-hole, and from installation through-hole to Outer discharge does not need artificial control at this time, and the air in hydraulic system can be discharged automatically for pressure measuring tie-in, avoids air Various harm in the presence of caused by, the hidden danger of removal system；The structure of pressure measuring tie-in is simple, can reduce compared with the prior art big The part of amount facilitates installation, while using the slide core of sliding, and the upper cambered surface with slide core cooperation, slide core are provided in slide core cavity After being against in cambered surface, the phenomenon that capable of connecting with slide core cavity air-tightness by slide core, be effectively prevented leakage.

Preferably, the liquid sealing ring is to be connected to the vertical side of slide core along the sleeve of slide core length direction setting On face.

By using above-mentioned technical proposal, the inner wall of liquid sealing ring and sliding channel can be come into full contact with, and guarantee itself and cunning Dynamic vias inner walls are tightly connected by good liquid, and pressure measuring tie-in is avoided the case where leakage occur.

Preferably, the upper surface of the slide core is provided with the groove of annular, the lower end of the spring is worn in a groove, The positioning column of limited spring is formed among the groove.

By using above-mentioned technical proposal, be that spring can be more stable is connected in slide core, and can apply to slide core Downward thrust.

Preferably, the sliding channel under shed is gradually reduced to form the lower camber side opposite with upper cambered surface, the slide core It is gradually reduced to form arcwall face for lower end diameter, abutting can be matched with lower camber side, form air-tightness connection.

By using above-mentioned technical proposal, slide core can match abutting with lower camber side, form air-tightness connection, can keep away Exempt from ambient atmosphere and hydraulic system is penetrated by the gap of slide core and slide core cavity, it is multiple to solve anti-air intake structure in the prior art Miscellaneous disadvantage optimizes structure.

Preferably, the pressure measuring tie-in further includes dust-proof cap assembly, the dust-proof cap assembly include dust cap ontology and Deflation feature, the dust cap ontology are cylindrical in shape, and the dust cap ontology is set in except fitting body and removable with fitting body It unloads and is fixedly connected；Outlet passageway is provided in the deflation feature, the air outlet of the outlet passageway is connected with ambient atmosphere It is logical, when the deflation feature is plugged in installation through-hole and forms hermetic seal with the hole wall of the installation through-hole and connect, it is described out The air inlet port in gas channel is connected with the installation through-hole and the sliding channel.

By using above-mentioned technical proposal, dust-proof cap assembly is set, the gas in hydraulic system can either be facilitated to discharge, External air return can also be prevented into hydraulic system, and dust can be prevented etc. to fall on pressure measuring tie-in and enter hydraulic Oil liquid is polluted in system.

Preferably, the inner wall of the installation through-hole is provided with seal groove, the seal groove is embedded with the first sealing ring, institute When stating deflation feature and being plugged in installation through-hole, the circumferential exterior surface of the deflation feature and the first sealing ring form hermetic seal and connect It connects.

By using above-mentioned technical proposal, can to avoid the gas isolated by hydraulic oil from the inner wall of installation through-hole with put It leaks between gas component, is discharged into greatly to make to pass through the outlet passageway being arranged in deflation feature by the gas that hydraulic oil is isolated Gas.

Preferably, the circumferential exterior surface of slide core cavity lower part is additionally provided with positive stop lug boss, the slide core cavity it It is arranged with washer outside, the washer is between the positive stop lug boss and the fitting body, the washer and the deflation feature Between be connected by chain.

By using above-mentioned technical proposal, dust-proof cap assembly is connected on slide core cavity by washer, to avoid dust cap Component is lost.

A kind of hydraulic system including the pressure measuring tie-in with degassing function and is provided with the mounting base of oil liquid through-hole, institute The slide core cavity lower part for stating pressure measuring tie-in is plugged in the oil liquid through-hole of mounting base and is detachably fixed connection, by oil liquid through-hole and Sliding channel connection.

By using above-mentioned technical proposal, facilitate the piping connection by pressure measuring tie-in and hydraulic system, facilitate maintenance and more It changes.

In conclusion the utility model has the following beneficial effects:

1, the utility model combines pressure measuring tie-in used in the prior art with vent valve, realizes pressure measuring tie-in Automatic ventilating function, guarantee the shadows such as the decline of control insensitive, performance, cavitation erosion caused by system will not be accumulated because of inner air It rings and the authenticity of data is assessed in harm, raising product test.

2, the utility model optimizes slide core and the structure of slide core cavity, reduces parts count, utilizes slide core and cunning The shape of core cavity body carries out air-tightness connection to the upper and lower side of sliding channel, effectively prevents the disengaging of air, can be by liquid Air discharge in pressure system is clean, and can prevent extraneous gas from entering in application system.

Detailed description of the invention

Fig. 1 is the connection structure diagram of the utility model pressure measuring tie-in；

Structure chart when Fig. 2 is the exhaust of the utility model pressure measuring tie-in.

In figure, 1, slide core cavity；2, fitting body；21, installation through-hole；3, slide core；31, liquid sealing ring；32, groove；33, fixed Position column；4, spring；5, sliding channel；51, upper cambered surface；52, lower camber side；6, dust-proof cap assembly；61, dust cap ontology；62, it deflates Component；63, the first sealing ring；7, positive stop lug boss；8, washer；81, chain；9, mounting base；91, oil liquid through-hole.

Specific embodiment

The utility model is described in further detail below in conjunction with attached drawing.

The utility model create description in, it is to be understood that term " center ", "upper", "lower", "front", "rear", The orientation or positional relationship of the instructions such as "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on attached drawing institute The orientation or positional relationship shown is merely for convenience of the creation of description the utility model and simplifies description, rather than indication or suggestion Signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to this The limitation of utility model.

A kind of pressure measuring tie-in with degassing function, as shown in Fig. 1, including slide core cavity 1, fitting body 2, slide core 3 with And the equal parts of spring 4.Wherein, 1 upper and lower ends of slide core cavity are open, and fitting body 2 is in downwardly open tubular structure, from the top down It is set in the outside of slide core cavity 1, and is threadedly coupled with the lateral surface of slide core cavity 1.

Sliding channel 5 is provided in slide core cavity 1, slide core 3 is slidably arranged in sliding channel 5, and in hydraulic or spring 4 Thrust under move up and down.The installation through-hole 21 being connected with sliding channel 5 is provided in fitting body 2, spring 4 is set to Between slide core 3 and fitting body 2,4 upper end of spring is against the under shed surrounding of installation through-hole 21, and lower end is against in slide core 3.Slide core 3 Upper surface be provided with the groove 32 of annular, 32 diameter of groove and the diameter of spring 4 match, and is inserted into spring 4 recessed In slot 32,32 depth of groove is less than the half of 3 height of slide core, and the lower end of spring 4 is threaded through in groove 32, is formed among groove 32 Positioning column 33 wears in spring 4, limits to it.

5 upper and lower ends of sliding channel opening is gradually reduced, and the upper arc at upper opening is formed on the inner wall of slide core cavity 1 Face 51, lower opening lower camber side 52；Slide core 3 is column structure, and the upper end radius is gradually reduced to form cambered surface chamfering, lower end half Diameter is also gradually reduced to form cambered surface chamfering；It is close that the part of 3 center vertical of slide core with the inner wall contact position of sliding channel 5 is provided with liquid Seal 31, liquid sealing ring 31 are connected on the vertical side of slide core 3 along the sleeve of 3 length direction of slide core setting, liquid sealing Circle 31 is bonded with the inner wall of sliding channel 5, oil liquid can be stopped to permeate up, but is not influenced gas and passed through, and gas is achieved in Liquid separation, spring 4 may be implemented the reset of slide core 3, be conducive to that operation is repeatedly exhausted；The cambered surface chamfering energy of 3 upper end of slide core It is enough to be bonded with upper cambered surface 51, it to be formed when the cambered surface chamfering of 3 upper end of slide core formation can be gradually reduced with 5 upper opening of sliding channel When upper cambered surface 51 matches abutting, air-tightness connection is formed.

When in pipeline without oil liquid, slide core 3 can be in the bottom of sliding channel 5, slide core 3 under the effect of 4 elastic force of spring The cambered surface chamfering of lower end can be bonded with lower camber side 52, when 3 lower end of slide core formed cambered surface chamfering can with opened under sliding channel 5 When mouthful the lower camber side 52 to be formed is gradually reduced and matching abutting, air-tightness connection is formed, stops outside air to enter pipeline and works as In.

As shown in Fig. 1, which further includes dust-proof cap assembly 6, and dust-proof cap assembly 6 includes dust-proof in the present embodiment Cap ontology 61 and deflation feature 62, dust cap ontology 61 are cylindrical in shape, and lower end is provided with opening, and dust cap ontology 6 is from the top down It is set in outside fitting body 2, and is detachably connected using bolt and fitting body 2；Deflation feature 62 is internally provided with outlet passageway, The air outlet of outlet passageway is connected with ambient atmosphere, and 62 lower end of deflation feature is plugged in installation through-hole 21, logical with sliding Road 5 is connected to.The inner wall of installation through-hole 21 is provided with an annular seal groove, and seal groove is embedded with the first sealing ring 63, deflates The outer wall of 62 lower end of component is connected to the inner ring of the first sealing ring 63, when deflation feature 62 is plugged in installation through-hole 21, deflates The circumferential exterior surface of component 62 and the first sealing ring 63 form hermetic seal and connect, can to avoid the gas isolated by hydraulic oil from It is leaked between the inner wall and deflation feature 62 of installation through-hole 21, to make to pass through deflation feature by the gas that hydraulic oil is isolated The outlet passageway being arranged on 62 is drained into the external world.The circumferential exterior surface of 1 lower part of slide core cavity is additionally provided with positive stop lug boss 7, slide core The top that 1 outer wall of cavity is located at positive stop lug boss 7 is arranged with washer 8, washer 8 be stuck in positive stop lug boss 7 and 2 lower surface of fitting body it Between, a chain 81 is also connected on washer 8,81 other end of chain is connected in deflation feature 62, and dust-proof cap assembly 6 is connected On slide core cavity 1, so that dust-proof cap assembly 6 be avoided to lose.

Hydraulic system provided by the utility model, including pressure measuring tie-in and mounting base 9 with degassing function, mounting base 9 It is arranged on the pipeline of oil liquid, oil liquid through-hole 91 is offered among mounting base 9,1 lower part of slide core cavity of above-mentioned pressure measuring tie-in is inserted It connects in oil liquid through-hole 91,91 inner wall of oil liquid through-hole is provided with internal screw thread, and 1 lower part outer wall of slide core cavity is provided with external screw thread, sliding 1 lower thread of core cavity body is connected in oil liquid through-hole 91, and oil liquid through-hole 91 is connected to sliding channel 5, is facilitated pressure measuring tie-in With the piping connection of hydraulic system.

As shown in Fig. 2, be at this time the exhaust condition of pressure measuring tie-in, slide core 3 in hydraulic system pressure effect under with The lower camber side 52 of sliding channel 5 separates, and is detached from hermetic seal state, slide core 3 enters the middle part of sliding channel 5, in 4 elastic force of spring It cannot be continued to move up under effect, slide core 3 is contacted with the side wall of sliding channel 5 at this time, i.e. liquid sealing ring 31 and sliding channel 5 Contact, slide core 3 and sliding channel 5 are in liquid sealing state at this time, and the air in oil liquid can enter peace by sliding channel 5 It fills in through-hole 21, and is discharged by the outlet passageway of deflation feature 62, oil liquid is blocked, and can be avoided leakage.

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.

Claims (8)

1. a kind of pressure measuring tie-in with degassing function, it is characterised in that: including slide core cavity (1), fitting body (2), slide core (3) And spring (4), shown slide core cavity (1) upper end opening, the fitting body (2) are cylindrical in shape, and are set in slide core chamber from the top down The outside of body (1) is simultaneously detachably connected；It is provided with the diminishing sliding channel of upward opening (5) in the slide core cavity (1), The slide core (3) is slidably arranged in the sliding channel (5), and the slide core (3) and the inner wall contact position of sliding channel (5) are set It is equipped with the liquid sealing ring (31) for allowing gas to pass through；The installation being connected with sliding channel (5) is provided on the fitting body (2) Through-hole (21), the spring (4) are set between slide core (3) and fitting body (2)；The slide core (3) is that upper end diameter gradually contracts Small cylinder, the arcwall face that the upper end is formed can be open with sliding channel (5) and the upper cambered surface (51) to be formed matching are gradually reduced It closes and pushes against, form air-tightness connection.

2. the pressure measuring tie-in according to claim 1 with degassing function, it is characterised in that: the liquid sealing ring (31) is Along the sleeve of slide core (3) length direction setting, it is connected on the vertical side of slide core (3).

3. the pressure measuring tie-in according to claim 1 with degassing function, it is characterised in that: the upper end of the slide core (3) Face is provided with the groove (32) of annular, and the lower end of the spring (4) is threaded through in groove (32), is formed among the groove (32) The positioning column (33) of limited spring (4).

4. the pressure measuring tie-in according to claim 1 with degassing function, it is characterised in that: under the sliding channel (5) Opening is gradually reduced to form the lower camber side (52) opposite with upper cambered surface (51), and the slide core (3) is that shape is gradually reduced in lower end diameter Camber face can match abutting with lower camber side (52), form air-tightness connection.

5. the pressure measuring tie-in according to claim 1 with degassing function, it is characterised in that: the pressure measuring tie-in further includes preventing Dirt cap assembly (6), the dust-proof cap assembly (6) include dust cap ontology (61) and deflation feature (62), the dust cap sheet Body (61) is cylindrical in shape, and the dust cap ontology (61) be set in except fitting body (2) and with fitting body (2) company of being detachably fixed It connects；It is provided with outlet passageway on the deflation feature (62), the air outlet of the outlet passageway is connected with ambient atmosphere, institute When stating deflation feature (62) and being plugged in installation through-hole (21) and form hermetic seal with the hole wall of the installation through-hole (21) and connect, The air inlet port of the outlet passageway is connected with the installation through-hole (21) and the sliding channel (5).

6. the pressure measuring tie-in according to claim 5 with degassing function, it is characterised in that: the installation through-hole (21) Inner wall is provided with seal groove, and the seal groove is embedded with the first sealing ring (63), and it is logical that the deflation feature (62) is plugged on installation When hole (21) is interior, the circumferential exterior surface of the deflation feature (62) forms hermetic seal with the first sealing ring (63) and connect.

7. the pressure measuring tie-in according to claim 6 with degassing function, it is characterised in that: under the slide core cavity (1) The circumferential exterior surface in portion is additionally provided with positive stop lug boss (7), is arranged with washer (8), the washer except the slide core cavity (1) (8) between the positive stop lug boss (7) and the fitting body (2), lead between the washer (8) and the deflation feature (62) Chain (81) is crossed to be connected.

8. a kind of hydraulic system, it is characterised in that: including the described in any item survey crimping with degassing function of claim 1-7 Head and the mounting base (9) for being provided with oil liquid through-hole (91), slide core cavity (1) lower part of the pressure measuring tie-in is plugged on mounting base (9) in oil liquid through-hole (91) and it is detachably fixed connection, oil liquid through-hole (91) is connected to sliding channel (5).