CN201908883U

CN201908883U - Two-position three-way pilot reversing valve

Info

Publication number: CN201908883U
Application number: CN201020687193XU
Authority: CN
Inventors: 黄河
Original assignee: Shanghai Meizuan Equipment Chengtao Co Ltd
Current assignee: Shanghai Meizuan Equipment Chengtao Co Ltd
Priority date: 2010-12-29
Filing date: 2010-12-29
Publication date: 2011-07-27
Anticipated expiration: 2020-12-29

Abstract

A two-position three-way pilot reversing valve comprises a valve body and a valve spool. The upper end of the valve body is fixedly connected with a pilot cylinder support; the pilot cylinder support is fixedly connected with a pilot cylinder; the pilot cylinder is fixedly connected with a manual rod support; a manual rod is arranged in the middle of the manual rod support; a piston is arranged in the pilot cylinder and connected to the upper end of a piston rod; the lower end of the piston rod can press the upper end of an ejector rod in a contacting manner; a large valve seat and a small valve seat are fixedly arranged in the valve body; the valve spool is arranged in the middles of the valve seats; the upper end of the valve spool can be matched with the lower end of the ejector rod to form metal seal; the middle of the valve spool is matched with the bottom of the small valve seat to form metal seal; channels are transversely arranged on the large valve seat and the small valve seat at the upper edge of the valve body and at the junction of the valve spool and the ejector rod; and return springs are sleeved on the piston rod, the ejector rod and the valve spool respectively. When the operating pressure of a wellhead hydraulic system reaches 10000psi (pounds per square inch), by the aid of the two-position three-way pilot reversing valve, the system can be operated normally to realize the oil way direction of the hydraulic system and connection-disconnection control of an oil way, the operating temperature ranges from -29DEG C to 65DEG C and the two-position three-way pilot reversing valve is applicable to severe environments.

Description

The two-bit triplet pilot reversing valve

[technical field]

The utility model relates to the hydraulic valve piece that has the high voltage device specific function in a kind of oil exploration equipment on the well head control system, particularly a kind of two-bit triplet pilot reversing valve.

[background technique]

The two-bit triplet pilot reversing valve is used to control the shutoff of high-pressure hydraulic fluid and the commutation of oil circuit, generally need be operated in more than the 6000psi higher reached at 20000psi.In the prior art.Conventional valve is moving by whole slide block, play the role of changing, sealing mainly is by the O type circle on slide block and the sealing of valve interior wall, general work pressure can only reach 4560psi, surpassed working pressure, O type circle does not just have the effect of sealing, thereby can not reach needed commutation function.

[summary of the invention]

Technical problem to be solved in the utility model is to overcome existing defective in the above-mentioned prior art, and a kind of two-bit triplet pilot reversing valve that surmounts general employed working pressure class of O type circle and environmental requirement is provided.

The utility model has adopted following technical proposal to solve its technical problem: a kind of two-bit triplet pilot reversing valve, comprise valve body and the spool that can in valve body, slide, it is characterized in that: this valve body upper end is bolted to connection guide's cylinder bearing, this guide's cylinder bearing is bolted to connection guide's cylinder, this guide's cylinder upper end is bolted to connection the manual rod bearing, be equipped with manual rod in the middle of this manual rod bearing, and with its by being threaded, guide's cylinder is built-in with piston, this piston thread connects the upper end of piston rod, the lower end of piston rod can press the upper end that is arranged on the middle push rod of valve body, also be fixedly equipped with big valve seat and little valve seat in the valve body, in the middle of this big valve seat and little valve seat, be equipped with the spool that to do axial displacement, the upper end of this spool forms the metallic seal shape after can coincideing with the lower end of push rod, after coincideing, the middle part of spool and little valve seat bottom form the metallic seal shape, at the big valve seat in valve body upper edge, little valve seat and spool upper end laterally are equipped with the passage that medium circulates with the place of joining of push rod lower end, on the manual rod bearing, also be equipped with the passage that leads to guide's cylinder cavity, upper cover of piston rod is established piston reset spring, sheathed push rod spring on the push rod, valve core upper sleeve is established valve core reseting spring, and valve gap is bolted to connection in valve body lower end.。

The utility model can guarantee when the well head hydraulic system working pressure reaches 10000psi, and system can proper functioning, realize pressure is reached 10000psi hydraulic system oil circuit direction, and the control of the break-make of oil circuit, using operating temperature is-29 ℃～65 ℃.Can be applicable in the rugged environment.

[description of drawings]

Fig. 1 is the utility model structural representation;

Structural representation when Fig. 2 is spool upper end and push rod lower end formation metallic seal shape;

Structural representation when Fig. 3 is spool middle part and little valve seat bottom formation metallic seal shape.

Each sequence number is expressed as respectively among the figure:

The 1-handle; The 3-manual rod; 4-manual rod bearing;

The 8-piston; The 12-bolt; The 15-push rod;

15.1-spheroid; The 16-push rod spring; The little valve seat of 18-;

18.1-arc-shaped surface; The 19-spool; 19.1-curved surface;

19.2-coniform inclined-plane; 19.3-passage; The 20-valve core reseting spring;

The big valve seat of 21-; The 25-bolt; The 27-piston rod;

The 28-piston reset spring; 29-guide's cylinder; 30-guide's cylinder bearing;

The 31-bolt; The 33-valve body; The 38-valve gap;

The 40-bolt; The A-passage; The K-passage;

The P-passage; The T-passage.

[embodiment]

The utility model will be further described below in conjunction with embodiment and accompanying drawing.

With reference to Fig. 1, the spool 19 that the utility model comprises valve body 33 and can slide in valve body.

Valve body described in the utility model 33 upper ends are by bolt 31 fixedly connected guide's cylinder bearings 30.This guide's cylinder bearing 30 is by bolt 12 fixedly connected guide's cylinders 29.These guide's cylinder 29 upper ends are by bolt 25 fixedly connected manual rod bearings 4.Be equipped with manual rods 3 in the middle of this manual rod bearing 4, and with its by being threaded.

Guide's cylinder 29 is built-in with piston 8, and the be threaded upper end of piston rod 27 of this piston 8, the lower end of piston rod 27 can press the upper end that is arranged on the push rod 15 in the middle of the valve body 33.

Also be fixedly equipped with big valve seat 21 and little valve seat 18 in the valve body 33, be equipped with the spool 19 that to do axial displacement at the center of this big valve seat 21, little valve seat 18.The top axial of this spool 19 is equipped with the passage 19.3 of medium circulation, and this passage 19.3 extends to the side surface of spool 19 behind next section.

With reference to Fig. 2, the upper end of described spool 19 forms the metallic seal shape after can coincideing with the lower end of push rod 15, this metallic seal shape structure is equipped with a spheroid 15.1 for the push rod lower end, spool 19 upper ends are equipped with and the corresponding curved surface 19.1 of above-mentioned sphere, constitute the metallic seal shape after this sphere and curved surface 19.1 match.

With reference to Fig. 3, after coincideing, the middle part of spool 19 and little valve seat 18 bottoms form the metallic seal shape.This shape metallic leak-proof structure is that spool 19 middle parts are equipped with coniform inclined-plane 19.2, and little valve seat 18 bottom inside edges are set to arc-shaped surface 18.1, constitutes the metallic seal shape after this coniform inclined-plane 19.2 matches with arc-shaped surface 18.1.

The utility model laterally is equipped with the passage P of medium circulation at the big valve seat 21 in valve body 33 upper edges; Laterally be equipped with the passage A of medium circulation at the little valve seat 18 in valve body 33 upper edges; Laterally be equipped with the passage T of medium circulation at the place of joining of valve body 33 upper edge spools, 19 upper ends and push rod 15 lower ends, in addition, on manual rod bearing 4, also be equipped with the passage K that leads to guide's cylinder 29 cavitys.

The utility model is sheathed piston reset spring 28 on piston rod 27, sheathed push rod spring 16 on push rod 15, sheathed valve core reseting spring 20 on spool 19.Valve gap 38 is fixedly connected on the lower end of valve body 33 by bolt 40.

The utility model also between guide's cylinder hand and manual rod and piston, between piston and the piston rod, between valve body and push rod, little valve seat and the big valve seat, all is equipped with O-ring seals between little valve seat and the spool.

Below sketch working principle of the present utility model: during work, K enters hydraulic oil by the pilot port passage, driven plunger 8 moves downward, and piston rod 27 also moves downward, and its lower end presses the upper end of push rod 15, the bar 15 that bears down on one moves downward, spool 19 also moves downward, and when the curved surface 19.1 of the sphere of the spheroid 15.1 of push rod 15 lower ends and spool 19 upper ends matches, constitutes the metallic seal shape, passage P is connected with passage A, and passage A and passage T closure are obstructed; If pilot pressure off-load, under the effect of piston reset spring 28, push rod spring 16, valve core reseting spring 20, spool 19 moves upward, after matching with little valve seat 18 bottom inside arc-shaped surfaces 18.1, its coniform inclined-plane 19.2 constitutes the metallic seal shape, passage P does not communicate with passage A, and passage A is connected with passage T.Thereby reach required actuating logic commutation function.Manually in like manner.

Claims

1. two-bit triplet pilot reversing valve, comprise valve body and the spool that can in valve body, slide, it is characterized in that: this valve body upper end is bolted to connection guide's cylinder bearing, this guide's cylinder bearing is bolted to connection guide's cylinder, this guide's cylinder upper end is bolted to connection the manual rod bearing, be equipped with manual rod in the middle of this manual rod bearing, and with its by being threaded, guide's cylinder is built-in with piston, this piston thread connects the upper end of piston rod, the lower end of piston rod can press the upper end that is arranged on the middle push rod of valve body, also be fixedly equipped with big valve seat and little valve seat in the valve body, in the middle of this big valve seat and little valve seat, be equipped with the spool that to do axial displacement, the upper end of this spool forms the metallic seal shape after can coincideing with the lower end of push rod, after coincideing, the middle part of spool and little valve seat bottom form the metallic seal shape, at the big valve seat in valve body upper edge, little valve seat and spool upper end laterally are equipped with the passage that medium circulates with the place of joining of push rod lower end, on the manual rod bearing, also be equipped with the passage that leads to guide's cylinder cavity, upper cover of piston rod is established piston reset spring, sheathed push rod spring on the push rod, valve core upper sleeve is established valve core reseting spring, and valve gap is bolted to connection in valve body lower end.

2. two-bit triplet pilot reversing valve according to claim 1 is characterized in that: the spool top axial is equipped with the passage of medium circulation, and this passage extends to the side surface of spool behind next section.

3. according to claim 1 or 2 described two-bit triplet pilot reversing valves, it is characterized in that: the spool upper end is equipped with a spheroid with push rod lower end formed metallic seal shape structure for the push rod lower end, the spool upper end is equipped with and the corresponding curved surface of above-mentioned sphere, constitutes the metallic seal shape after this sphere and curved surface match.

4. two-bit triplet pilot reversing valve according to claim 1, it is characterized in that: the spool middle part is that the spool middle part is equipped with coniform inclined-plane with the formed shape metallic leak-proof structure in little valve seat bottom, inside edge, little valve seat bottom is set to arc-shaped surface, constitutes the metallic seal shape after this coniform inclined-plane and arc-shaped surface match.

5. two-bit triplet pilot reversing valve according to claim 1, it is characterized in that: between guide's cylinder hand and manual rod and the piston, between piston and the piston rod, between valve body and push rod, little valve seat and the big valve seat, all be equipped with O-ring seals between little valve seat and the spool.