CN201461565U

CN201461565U - Hydraulic lock

Info

Publication number: CN201461565U
Application number: CN2009200780544U
Authority: CN
Inventors: 袁才富; 朱剑根; 金丹; 陈长信; 张妮; 谷文平; 米根祥; 沈至伟
Original assignee: Shanghai Lixin Hydraulic Co Ltd
Current assignee: Shanghai Lixin Hydraulic Co Ltd
Priority date: 2009-07-09
Filing date: 2009-07-09
Publication date: 2010-05-12
Anticipated expiration: 2019-07-09

Abstract

A hydraulic lock comprises a valve body and a one-way device which controls the reverse flowing between an oil outlet and an oil inlet through the opening and closure, wherein the one-way device is composed of a valve seat, and a conical valve core and a spring which are arranged in the valve seat, wherein the front end of the conical valve core is mutually sealed with the valve seat, and the oil sealing surface of the conical valve core is a spherical structure. The hydraulic lock has the advantages that as the valve seat and the conical valve core are mutually sealed, and the oil sealing surface of the conical valve core is a spherical structure, the conical valve core is consistently contacted with an oil sealing hole of the valve seat no matter how the conical valve core swings in the valve seat, thereby the sealing is reliable without leakage, and the flowing quantity is large.

Description

A kind of hydraulic lock

Technical field

The utility model relates to a kind of hydraulic control device, relates in particular to a kind of hydraulic lock.

Background technique

Hydraulic lock, a kind of device that in the oil hydraulic cylinder oil circuit, plays the locking effect, it can make weight and actuator be parked in reliably on the arbitrary position of need of work, plays locking pressurize effect, guarantees that host work is safe and reliable.

Now, the hydraulic lock seal structure form supporting for crane mainframe mostly is steel ball type structure or cone valve structure, the steel ball type sealing structure is better, but through-current capacity is less, and the cone valve structure through-current capacity is bigger, but cone valve and valve seat are line contact sealing, because of gapped between cone valve and the valve seat, may not guarantee during work that cone valve and valve seat are concentric, sealing be cannot say for sure to demonstrate,prove, and easy to wear.

The model utility content

Technical problem to be solved in the utility model is, the defective that overcomes prior art provides the hydraulic lock of the big and good airproof performance of a kind of discharge value.

To achieve these goals, the technical solution of the utility model is as follows:

A kind of hydraulic lock is characterized in that: comprise

Valve body; Side of valve body offers filler opening V1, filler opening V2, and the bottom surface of valve body has oil outlet C1, oil outlet C2; Be provided with main aperture in the valve body, this main aperture is divided into left and right two ones; Oil inlet hole V1, oil outlet C1 are connected with the left part main aperture, and oil inlet hole V2, oil outlet C2 are connected with the right part main aperture;

By the non-return device of on-off action control oil outlet to the oil inlet hole reverse flow; One group of non-return device is all arranged in described left part main aperture and the right part main aperture, and this non-return device comprises valve seat, is positioned at the poppet valve core and the spring of valve seat, sealing mutually between the front end of poppet valve core and the valve seat, and the oil sealing surface of poppet valve core is a spheric structure;

The control spool that connects left and right non-return device, the two ends of control spool withstand on the poppet valve core.

Further, in the utility model, the middle part of described control spool is fluted, in the both sides of described groove radial groove is arranged, so that the move left and right of control spool.

Further, in the utility model, the plug screw that is threaded on the described valve seat, spring is arranged between plug screw and the poppet valve core, is convenient to the elastic force of Regulation spring.

Advantage of the present utility model is:

1, sealing mutually between valve seat of the present utility model and the poppet valve core, and the oil sealing surface of poppet valve core is spheric structure, no matter how poppet valve core is swung in valve seat, keep in touch with valve seat oil sealing mouth all the time, thus make sealing reliable do not have leak, and discharge value is big.

2, valve inner designs simplification of the present utility model, processing technology is simple, and is easy for installation, is convenient to mounting or dismounting and maintenance.

Description of drawings

Describe the utility model in detail below in conjunction with the drawings and specific embodiments:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is that the A of Fig. 1 is to schematic representation;

Fig. 3 is the structural representation of control spool of the present utility model;

Fig. 4 is the structural representation of poppet valve core of the present utility model;

Fig. 5 is a schematic diagram of the present utility model.

Embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

Referring to Fig. 1 and 2, a kind of hydraulic lock is made two oil inlet hole V1, V2 in a side of its valve body 1, makes two oil outlet C1 and C2 in the bottom surface of valve body 1.And import adopts tubular type to connect, and board-like connection is adopted in outlet.Make the main aperture of valve body 1 by mach method, the through hole that main aperture can be divided into left part main aperture, right part main aperture and be communicated with left part main aperture and right part main aperture, oil inlet hole V1, oil outlet C1 are connected with the left part main aperture, and oil inlet hole V2, oil outlet C2 are connected with the right part main aperture.

One group of non-return device is all arranged in left part main aperture and the right part main aperture, control the reverse flow of oil outlet C1 to oil inlet hole V1 or oil outlet C2 to oil inlet hole V2 by the switching of this non-return device.Connect by the control spool between two groups of non-return devices, non-return device comprises valve seat and poppet valve core.

Valve seat 4 links together by the main aperture of screw thread and valve body 1.Cylindrical is made groove in the externally threaded both sides of valve seat 4, places back-up ring 2 and seal ring 3 in the groove, prevents the hydraulic oil external leakage.Make oilhole 12 at the front end of valve seat 4.On valve seat 4, make stepped axial bore, be used to place poppet valve core.

Poppet valve core 10 is installed in the valve seat 4, sealing mutually between the front end of poppet valve core 10 and the valve seat 4, and the oil sealing surface 13 of poppet valve core is spheric structure (as shown in Figure 4), no matter how poppet valve core is swung in valve seat, all the time keep in touch with valve seat oil sealing mouth, thereby the reliable nothing of sealing is leaked.One side of oil sealing surface 13 has cavity volume 15, and this cavity volume 15 is communicated with oil inlet hole, and the opposite side of oil sealing surface 13 is communicated with oil outlet.On the circumference side of poppet valve core, make radial hole 11, make macropore, be used to place spring in the rear end of poppet valve core.

Plug screw 7 is threaded on the valve seat, makes interior hexagonal in the exterior edge face of plug screw 7, during mounting or dismounting and spanner be used.On the cylindrical of plug screw 7, make groove, be used to assemble back-up ring 6 and seal ring 5, prevent that hydraulic oil from leaking.Make a blind hole on plug screw 7, be used for the location of spring 9 one ends, the other end of spring 9 is placed in the macropore of poppet valve core 10.The spring force that utilizes spring 9 withstands on the oil sealing surface of poppet valve core 10 front ends on the oil sealing mouth of valve seat 4.

Referring to Fig. 3, the control spool 8 that is positioned at valve body 1 neutral position is the multidiameter shaft shape, and its middle part is suitable with through hole, and two ends are stretched in the valve seat 4, and withstand on the front end of poppet valve core 10.Control spool 8 meta make groove 16, respectively make two radial grooves 17 at groove about 16, so as with control spool move left and right.

Referring to Fig. 1 and 5, hydraulic lock control port shown in Fig. 1 is in closed condition, when hydraulic oil flows into from filler opening V1, along with flow increases, the cracking pressure that oil liquid pressure overcomes the spring 9 on the left side moves to left the poppet valve core 10 on the left side, the oil sealing surface on the left side is opened, and filler opening V1 and oil outlet C1 are communicated with, and the displacement size of the poppet valve core 10 on the left side is determining the size of through-current capacity; The compression face 14 of the control of oil liquid pressure promotion simultaneously spool 8 moves to right, the cracking pressure that control spool 8 overcomes the spring 9 on the right makes the poppet valve core 10 on the right toward moving right, the oil sealing surface on the right is opened, oil outlet C2 and filler opening V2 are communicated with, can make fluid flow to filler opening V2 like this, and the on-off action of hydraulic lock does not have shock and vibration gently from oil outlet C2.

Same principle, when hydraulic oil flows into from filler opening V2, when oil outlet C2 flowed out, when reaching certain pressure, oil outlet C1 and filler opening V1 were communicated with, and can make fluid flow to filler opening V1 from oil outlet C1 like this.

Be fluid can by filler opening V1 to oil outlet C1 or filler opening V2 to oil outlet C2 free-flow, then sealing in the other direction.

More than show and described basic principle of the present utility model, major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in the foregoing description and the specification is principle of the present utility model; the utility model also has various changes and modifications under the prerequisite that does not break away from the utility model spirit and scope, and these changes and improvements all fall in the claimed scope of the present utility model.The protection domain that the utility model requires is defined by appending claims and equivalent thereof.

Claims

1. a hydraulic lock is characterized in that: comprise

2. hydraulic lock according to claim 1 is characterized in that the middle part of described control spool is fluted, in the both sides of described groove radial groove is arranged.

3. hydraulic lock according to claim 1 is characterized in that, the plug screw that is threaded on the described valve seat, and spring is arranged between plug screw and the poppet valve core.