CN204004415U - A kind of valve seal ring - Google Patents

Abstract

The utility model discloses a kind of valve seal ring, comprise inner peripheral surface, with the coaxial outer peripheral surface of inner peripheral surface and be positioned at inner peripheral surface and the end face of outer peripheral surface both sides, also comprise two outer conical surface coaxial with described inner peripheral surface, two outer conical surface are connected with one end of described outer peripheral surface and the edge of a described end face respectively, and the diameter of end face is less than the diameter of outer peripheral surface.Valve seal ring of the present utility model, the outer conical surface arranging by outer surface, outer conical surface makes seal ring reduce at the diameter at end positions place, in the time that seal ring moves in valve casing along with spool, on the one hand be convenient to seal ring and slip over the liquid pass hole on valve casing, can reduce on the other hand and the area of contact of liquid pass hole, reduce the wearing and tearing of seal ring, thereby can improve sealing effect and the working life of seal ring, finally can improve the sealability between spool and valve casing.

Description

A kind of valve seal ring

Technical field

The utility model belongs to coal mine fully-mechanized mining technical field of hydraulic elements, and specifically, the utility model relates to a kind of valve seal ring.

Background technique

At present, be applied to the each hydraulic element in the oil hydraulic circuit of coal mine fully-mechanized mining hydraulic support, as manually operated valve group, between valve casing and spool in order to improve sealing effect, the general compound sealing structure that adopts, compound sealing structure is by the less O type circle of inner side and forming compared with big sealing ring of O type circle outside.Owing to being provided with the liquid pass hole that allows pressured fluid pass through on valve casing, liquid pass hole with can produce friction compared with big sealing ring surface, cause seal ring easily damaged, affect seal ring working life and sealing effect, and then can cause defective valve.

Model utility content

The utility model provides a kind of valve seal ring, and object is to improve working life and sealing effect.

To achieve these goals, the technological scheme that the utility model is taked is: a kind of valve seal ring, comprise inner peripheral surface, with the coaxial outer peripheral surface of inner peripheral surface and be positioned at inner peripheral surface and the end face of outer peripheral surface both sides, also comprise two outer conical surface coaxial with described inner peripheral surface, two outer conical surface are connected with one end of described outer peripheral surface and the edge of a described end face respectively, and the diameter of end face is less than the diameter of outer peripheral surface.

Described inner peripheral surface is provided with the locating slot for holding O type circle.

Described locating slot is the annular positioning groove along whole circumferential extension on described inner peripheral surface.

The vertical sectional shape of described locating slot is arc.

Described locating slot is positioned at the neutral position place of described inner peripheral surface.

The cone angle of described outer conical surface is 40 degree.

The material of described seal ring is nylon.

Valve seal ring of the present utility model, the outer conical surface arranging by outer surface, outer conical surface makes seal ring reduce at the diameter at end positions place, in the time that seal ring moves in valve casing along with spool, on the one hand be convenient to seal ring and slip over the liquid pass hole on valve casing, can reduce on the other hand and the area of contact of liquid pass hole, reduce the wearing and tearing of seal ring, thereby can improve sealing effect and the working life of seal ring, finally can improve the sealability between spool and valve casing.

Brief description of the drawings

This specification comprises the following drawings, shown in content respectively:

Fig. 1 is the sectional view of the utility model valve seal ring;

Fig. 2 is A place enlarged view in Fig. 1;

Fig. 3 is the erection drawing of the utility model valve seal ring and O type circle;

Fig. 4 is the sectional view that adopts the manually operated valve group mangetic core assembly of the utility model valve seal ring;

Fig. 5 is B place enlarged view in Fig. 4;

In figure, be labeled as:

1, inner peripheral surface; 2, outer peripheral surface; 3, outer conical surface; 4, locating slot; 5, trunk portion; 6, frustum portion; 7, end face; 8, O type circle.

Embodiment

Contrast accompanying drawing below, by the description to embodiment, embodiment of the present utility model is described in further detail, and object is to help those skilled in the art to have more complete, accurate and deep understanding to design of the present utility model, technological scheme, and contributes to its enforcement.

As shown in Figure 1 to Figure 3, a kind of valve seal ring of the utility model, is the mangetic core assembly for manually operated valve group, and the formation compound sealing structure that matches with O type circle 8, improves spool and be enclosed within the sealability between the valve casing outside spool.This valve is cirque structure by seal ring entirety, center is provided with circular hole, it comprises an inner peripheral surface 1, an outer peripheral surface 2 and is positioned at inner peripheral surface 1 and the end face 7 of outer peripheral surface 2 both sides, inner peripheral surface 1 is coaxial with outer peripheral surface 2, end face 7 is disk, two end faces 7 parallel, and coaxial with inner peripheral surface 1, and two end faces 7 are connected with one end of inner peripheral surface 1 respectively.This valve also comprises two outer conical surface 3 coaxial with inner peripheral surface 1 with seal ring, two outer conical surface 3 are connected with one end of outer peripheral surface 2 and the edge of an end face 7 respectively, be that outer conical surface 3 lays respectively between outer peripheral surface 2 and an end face 7, the diameter of end face 7 is less than the diameter of outer peripheral surface 2, the bigger diameter end that is outer conical surface 3 is connected with outer peripheral surface 2, and miner diameter end is connected with end face 7.Outer peripheral surface 2 positions are the trunk portion 5 of valve seal ring, and outer conical surface 3 positions in two ends are the frustum portion 6 of valve seal ring, and outer conical surface 3 makes the two ends of valve seal ring be conical.As shown in Figure 4 and Figure 5, in the time being enclosed within compound sealing structure on spool and moving in valve casing with spool, the outer peripheral surface 2 of this seal ring contacts with the internal surface of valve casing, move to the liquid pass hole position on valve casing at seal ring with spool, the two ends of seal ring are conical, thereby can avoid end directly to contact with liquid pass hole, being convenient to seal ring slips over the liquid pass hole on valve casing so on the one hand, can reduce on the other hand the area of contact of seal ring and liquid pass hole, reduce the wearing and tearing that liquid pass hole causes seal ring, thereby can improve sealing effect and the working life of seal ring, finally can improve the sealability between spool and valve casing.

Specifically, on inner peripheral surface 1 at this valve with seal ring, be provided with one for holding the locating slot 4 of O type circle 8, this locating slot 4 is the annular positioning groove 4 along whole circumferential extension on inner peripheral surface 1, and the vertical sectional shape of locating slot 4 is arc, its radian is 80 degree left and right, to adapt to the shape of O type circle 8.O type circle 8 has certain elasticity, it is arranged on the inside of this valve seal ring, can make the radially outside distending of this valve seal ring, because spool is for movably, on the sidewall of valve casing, be provided with liquid pass hole, in the time that pressured fluid enters spool through valve casing liquid pass hole, spool moves when liquid pass hole is alignd with seal ring with this valve, the pressured fluid that liquid pass hole overflows can form erosion with the outer peripheral surface 2 of seal ring to this valve, this valve is produced to pressure with seal ring, and then can make this valve seal ring have the trend of radially shrinking, and O type circle 8 embeds in locating slot 4 this valve seal ring is applied to active force, can make this valve seal ring keep the trend outwards expanding, thereby make this valve with seal ring contact with valve casing internal surface tightr, weaken the erosion to this valve seal ring of pressured fluid from overflowing in the liquid pass hole of valve casing, thereby can further improve sealing reliability and the working life of this valve seal ring, can further improve sealability.Meanwhile, this valve also has certain guide functions with the frustum portion 6 at seal ring two ends to the pressured fluid overflowing from liquid pass hole.

As shown in Figure 2, as preferably, locating slot 4 is the neutral position places in the axial direction that are positioned at inner peripheral surface 1, outer peripheral surface 2 is also the neutral position corresponding to inner peripheral surface 1, and locating slot 4 width is vertically greater than the width of outer peripheral surface 2, thereby guarantee that locating slot 4 can hold the O type circle 8 that thickness is greater than outer peripheral surface 2 width.Therefore locating slot 4 is arranged on to the neutral position place of inner peripheral surface 1, O type circle 8 is large by the area of contact of seal ring with this valve, and active force is strong, can guarantee that trunk portion 5 and valve casing internal surface keep larger area of contact, can further improve sealing effect.

As preferably, the cone angle of two outer conical surface 3 is 40 degree, and 40 degree are conventional chamfer dimesion.

As preferably, the general quality of rubber materials that adopts of O type circle 8 is made, and this valve is nylon by the material of seal ring, and the seal ring of nylon material has advantages of that intensity is high, precision is high and wear resistance is good, has higher working life and sealing effect.

Below by reference to the accompanying drawings the utility model is exemplarily described.Obviously, the utility model specific implementation is not subject to the restrictions described above.As long as having adopted the improvement of the various unsubstantialities that method of the present utility model design and technological scheme carry out; Or without improvement, above-mentioned design of the present utility model and technological scheme are directly applied to other occasion, all within protection domain of the present utility model.

Claims (7)

1. a valve seal ring, comprise inner peripheral surface, with the coaxial outer peripheral surface of inner peripheral surface and be positioned at inner peripheral surface and the end face of outer peripheral surface both sides, it is characterized in that: also comprise two outer conical surface coaxial with described inner peripheral surface, two outer conical surface are connected with one end of described outer peripheral surface and the edge of a described end face respectively, and the diameter of end face is less than the diameter of outer peripheral surface.

2. valve seal ring according to claim 1, is characterized in that: described inner peripheral surface is provided with the locating slot for holding O type circle.

3. valve seal ring according to claim 2, is characterized in that: described locating slot is the annular positioning groove along whole circumferential extension on described inner peripheral surface.

4. valve seal ring according to claim 3, is characterized in that: the vertical sectional shape of described locating slot is arc.

5. according to the arbitrary described valve seal ring of claim 2 to 4, it is characterized in that: described locating slot is positioned at the neutral position place of described inner peripheral surface.

6. valve seal ring according to claim 5, is characterized in that: the cone angle of described outer conical surface is 40 degree.

7. valve seal ring according to claim 6, is characterized in that: the material of described seal ring is nylon.