CN203571178U

CN203571178U - Electromagnetic valve

Info

Publication number: CN203571178U
Application number: CN201320662526.7U
Authority: CN
Inventors: 金红明; 周衍靖; 钟艺
Original assignee: NINGBO LONGTENG HYDRAULIC COMPONENTS Co Ltd
Current assignee: NINGBO LONGTENG HYDRAULIC COMPONENTS Co Ltd
Priority date: 2013-10-25
Filing date: 2013-10-25
Publication date: 2014-04-30
Anticipated expiration: 2023-10-25

Abstract

The utility model discloses an electromagnetic valve which comprises a guide sleeve, a valve sleeve, a main valve element, a taper valve element and a manual control device. One end of the guide sleeve is fixedly provided with fixed iron, and movable iron is arranged in a cavity of the guide sleeve in a sliding mode; the valve sleeve is provided with a first oil port and a second oil port, the main valve element can be movably arranged in the valve sleeve, the front end of the main valve element is provided with a one-way oil inlet hole communicated with the first oil port, and the lateral portion of the main valve element is provided with an oil outlet hole communicated with the second oil port; a pilot valve element is disposed at the front end of the movable iron, and the front end extends into a cavity of the main valve element and is matched with the one-way oil inlet hole to achieve one-way oil entering; the manual control device is used for opening the electromagnetic valve in power-off situations. Compared with an original structure, the electromagnetic valve is compact in structure, small in size, low in weight, reliable in work, little in internal leakage, and suitable for being used in various mechanical devices and hydraulic systems with high work pressure, large flow and high integration requirements.

Description

Solenoid valve

Technical field

The utility model relates to a kind of solenoid valve, belongs to hydrovalve technical field.

Background technique

In modern machinery, hydraulic system, widely applied one-way non-return oil hydraulic circuit, wherein single non-return solenoid valve is the crucial hydraulic element of this type systematic, the quality of single non-return magnetic valve performance directly affects the performance of main frame.Existing single non-return solenoid valve is divided into two kinds of board-like single non-return and plug-in type list non-return solenoid valves by Placement, in system, in order to reduce installing space, improves system reliability, generally adopts plug-in type list non-return solenoid valve.Existing plug-in type list non-return solenoid valve has the following disadvantages: first, electromagnet argon arc welding technique is subject to narrow limitation, the quality problems such as the pore that welding condition produces in welding, inclined to one side weldering, welding stress, thus reduce working life and reliability; Secondly, structure is thin, and technology difficulty is large, and during the actual use of product, jack decentraction or mounting torque are crossed conference spool is blocked, and to main frame reliability, cause and have a strong impact on.In sum, existing plug-in type list non-return electromagnetic valve structure also can be further improved.

Summary of the invention

For the deficiencies in the prior art, the utility model provides solenoid valve.

The utility model is achieved by the following technical solution: solenoid valve, comprise guide pin bushing, and in one end of described guide pin bushing, be fixedly installed and determine iron, in the cavity of guide pin bushing, slide moving iron is set; Coil, described coil is coated on guide pin bushing outside, provides and make described moving iron determine to described the magnetic field that iron moves under coil "on" position; Valve pocket, described valve pocket is fixedly installed on one end of described guide pin bushing, and described valve pocket has the cavity being communicated with described guide pin bushing cavity, at end and the sidewall of described valve pocket, offers respectively the first hydraulic fluid port and the second hydraulic fluid port that are communicated with valve pocket cavity; Main valve plug, described main valve plug slides and is arranged at the inner chamber of described valve pocket, and described main valve plug has hollow cavity, in described main valve plug end, offers the oil inlet hole being communicated with its inner chamber, and described main valve plug sidewall offers the oil outlet being communicated with its inner chamber; Main valve plug one end arranges chamfering, and the tapering of described chamfering is between 45 ° to 60 °; Poppet valve core, described moving iron is fixed in one end of described poppet valve core, and described poppet valve core stretches into described main valve plug and the other end of described poppet valve core and the oil inlet hole of described main valve plug coordinated realize unidirectional oil-feed; Manual overvide, described manual overvide comprises guide sleeve, swivelling chute, pull bar and top cap, sidewall at described guide sleeve is offered mounting hole, in described mounting hole, plug a bearing pin, on described swivelling chute, be provided for holding the groove of described bearing pin, the side that swivelling chute is relative with described groove arranges breach, and the sidewall of groove one side is lower than the sidewall of opposite side; Described swivelling chute is sheathed in the described cavity of determining iron one end, described guide sleeve slides and is arranged in described swivelling chute, described pull bar one end has the head expanding, the head that described pull bar expands by described guide sleeve and pull bar leans the step surface of described moving iron inner chamber body, and described top cap is fixed on a side of described guide sleeve.

In technique scheme, on the outer side wall of described main valve plug, offer pressure stabilizing tank.

In technique scheme, described pressure stabilizing tank interval is uniformly distributed.

In technique scheme, one end of described poppet valve core is provided with fixture block, and one end that described moving iron coordinates with described poppet valve core has the draw-in groove coordinating with described fixture block.

The utlity model has following beneficial effect: compact overall structure, volume is little, lightweight, reliable operation, internal leakage is little, applicable to high workload pressure, large flow, integrated requirement in high various mechanized equipments and hydraulic system.

Accompanying drawing explanation

Fig. 1 is cross-sectional schematic of the present utility model.

Fig. 2 is the stereochemical structure decomposing schematic representation of the utility model manual overvide.

Fig. 3 is the structural representation of swivelling chute.

Fig. 4 is the cooperation schematic diagram of iron and poppet valve core.

Fig. 5 is the partial enlarged drawing at A place in Fig. 1.

Fig. 6 is the perspective view of main valve plug.

Embodiment

Below the utility model is described in further detail, referring to Fig. 1 to Fig. 6, solenoid valve, comprises guide pin bushing 1, in one end of described guide pin bushing 1, is fixedly installed and determines iron 2, slides moving iron 3 is set in the cavity of guide pin bushing 1; Coil (accompanying drawing is not shown), described coil is coated on guide pin bushing 1 outside, provides and make described moving iron 3 determine to described the magnetic field that iron 2 moves under coil "on" position; Valve pocket 4, described valve pocket 4 is fixedly installed on one end of described guide pin bushing 1, and described valve pocket 4 has the cavity being communicated with described guide pin bushing 1 cavity, at end and the sidewall of described valve pocket 4, offers respectively the first hydraulic fluid port 40 and the second hydraulic fluid port 41 that are communicated with valve pocket cavity; Main valve plug 5, described main valve plug 5 slides and is arranged at the inner chamber of described valve pocket 4, and has hollow cavity, in described main valve plug 5 ends, offers the oil inlet hole 50 being communicated with its inner chamber, and described main valve plug sidewall offers the oil outlet 51 being communicated with its inner chamber; Poppet valve core 6, described moving iron 3 is fixed in one end of described poppet valve core 6, and described poppet valve core 6 stretches into described main valve plug 5 and makes the other end of described poppet valve core 6 and the cooperation of the oil inlet hole of described main valve plug 5 realize unidirectional oil-feed, main valve plug 5 one end arrange chamfering 52, and the angle of described chamfering 52 is between 45 ° to 60 °; Within the scope of this chamfer angle, assurance main valve plug 5 can be opened stably; Manual overvide, described manual overvide comprises guide sleeve 7, swivelling chute 8, pull bar 9 and top cap 10, at the sidewall of described guide sleeve 7, offer mounting hole 70, in described mounting hole 70, plug a bearing pin 71, on described swivelling chute 8, be provided for holding the groove 80 of described bearing pin 71, the side that swivelling chute 8 is relative with described groove 80 arranges breach 81, and the sidewall of groove 80 1 sides is lower than the sidewall of opposite side; Described swivelling chute 8 is sheathed in the described cavity of determining iron 2 one end, described guide sleeve 7 slides and is arranged in described swivelling chute 8, described pull bar 9 one end have the head 90 expanding, the head that described pull bar 9 expands by described guide sleeve 7 and pull bar leans the step surface of described moving iron 3 inner chamber body, and described top cap 10 is fixed on a side of described guide sleeve 7.

On the outer side wall of described main valve plug 5, offer pressure stabilizing tank 51, described pressure stabilizing tank 51 is provided with three and described pressure stabilizing tank 51 intervals and is uniformly distributed.The cross section of described pressure stabilizing tank 51 is triangular in shape, and pressure stabilizing tank can make on same circumference pressure oil everywhere communicate with each other, and eliminates the hydraulic power that spool is subject to, and makes spool in centralized positioning.

One end of described poppet valve core 6 is provided with fixture block 60, and one end that described moving iron 3 coordinates with described poppet valve core 6 has the draw-in groove 30 coordinating with described fixture block 60.

When the electromagnet no electric circuit of solenoid valve, the first hydraulic fluid port is equivalent to one-way valve to the second hydraulic fluid port, the first hydraulic fluid port pressure raises while exceeding the cracking pressure of one-way valve, main valve plug is opened fluid and is flowed from the first hydraulic fluid port to the second hydraulic fluid port, direction the second hydraulic fluid port is closed to the first hydraulic fluid port, when coil electricity, the second hydraulic fluid port is opened to the first hydraulic fluid port, and the first hydraulic fluid port only has a small amount of fluid to flow out by filler opening to the second hydraulic fluid port.While requiring the second hydraulic fluid port to open to the first hydraulic fluid port when the coil no electric circuit of solenoid valve, can by under the cap 10 that bears down on one, make bearing pin 71 depart from described groove 80, then rotate described pressure cap 10, make bearing pin 71 enter described breach 81, now can by draw top cap 10, top cap 10 drives pull bar 9, pull bar 9 drives described moving iron 3 and poppet valve core 6, thereby one end that the oil inlet hole 50 of poppet valve core 6 one end and described main valve plug 5 is coordinated is Fen Li, and now fluid can enter the first hydraulic fluid port by the second hydraulic fluid port.

Claims

1. solenoid valve, is characterized in that: comprise guide pin bushing (1), in one end of described guide pin bushing (1), be fixedly installed and determine iron (2), in the cavity of guide pin bushing (1), slide moving iron (3) is set; Coil, described coil is coated on guide pin bushing (1) outside, provides and make described moving iron (3) to described magnetic field of determining iron (2) movement under coil "on" position; Valve pocket (4), described valve pocket (4) is fixedly installed on one end of described guide pin bushing (1), and described valve pocket (4) has the cavity being communicated with described guide pin bushing (1) cavity, at end and the sidewall of described valve pocket (4), offer respectively the first hydraulic fluid port (40) and the second hydraulic fluid port (41) that are communicated with valve pocket cavity; Main valve plug (5), described main valve plug (5) slides and is arranged at the inner chamber of described valve pocket (4), and there is hollow cavity, in described main valve plug (5) end, offer the oil inlet hole (50) being communicated with its inner chamber, described main valve plug (5) sidewall offers the oil outlet (51) being communicated with its inner chamber, main valve plug (5) one end arranges chamfering (52), and the angle of described chamfering (52) is between 45 ° to 60 °; Poppet valve core (6), described moving iron (3) is fixed in one end of described poppet valve core (6), and described poppet valve core (6) stretches into described main valve plug (5) and the other end of described poppet valve core (6) and the oil inlet hole (50) of described main valve plug (5) coordinated realize unidirectional oil-feed; Manual overvide, described manual overvide comprises guide sleeve (7), swivelling chute (8), pull bar (9) and top cap (10), at the sidewall of described guide sleeve (7), offer mounting hole (70), in described mounting hole (70), plug a bearing pin (71), on described swivelling chute (8), be provided for holding the groove (80) of described bearing pin (71), the side that swivelling chute (8) is relative with described groove (80) arranges breach (81), and the sidewall of groove (80) one sides is lower than the sidewall of opposite side; Described swivelling chute (8) is sheathed in the described cavity of determining iron (2) one end, described guide sleeve (7) slides and is arranged in described swivelling chute (8), described pull bar (9) one end has the head (90) expanding, the head that described pull bar (9) expands by described guide sleeve (7) and pull bar leans the step surface of described moving iron (3) inner chamber body, and described top cap (10) is fixed on a side of described guide sleeve (7).

2. solenoid valve as claimed in claim 1, is characterized in that: on the outer side wall of described main valve plug (5), offer pressure stabilizing tank (51).

3. solenoid valve as claimed in claim 2, is characterized in that: described pressure stabilizing tank (51) interval is uniformly distributed.

4. solenoid valve as claimed in claim 1, is characterized in that: one end of described poppet valve core (6) is provided with fixture block (60), and one end that described moving iron (3) coordinates with described poppet valve core (6) has the draw-in groove (30) coordinating with described fixture block (60).