CN108488394B

CN108488394B - Double-conical hydraulic valve

Info

Publication number: CN108488394B
Application number: CN201810416314.8A
Authority: CN
Inventors: 夏征盛
Original assignee: Wenzhou Polytechnic
Current assignee: Sant Shenzhen Hydraulic Co ltd
Priority date: 2018-05-03
Filing date: 2018-05-03
Publication date: 2020-05-19
Anticipated expiration: 2038-05-03
Also published as: CN108488394A

Abstract

The invention discloses a double-cone hydraulic valve, wherein a hydraulic telescopic conical head switching device of the double-cone hydraulic valve consists of a shell and a flange plate connected with a central connecting disk, a hydraulic oil cylinder is arranged inside the shell, a hydraulic oil cavity is formed between the periphery of the hydraulic oil cylinder and the inner wall of the shell, the hydraulic oil cylinder is in sliding fit with a piston rod of a piston, a plurality of sealing rings are arranged between the hydraulic oil cylinder and the piston rod, a base is arranged at the tail end of the piston rod of the piston, an end cover is fixedly connected to the end surface of the tail end of the base through a screw, a sealing head is arranged between the base and the end cover, and when the valve is closed, the piston rod extends outwards to enable the peripheral surface of the sealing head to be in close contact with the inner wall of a conical pipe of the shell so as to prevent liquid from entering the hydraulic. Due to the adoption of the structure, the sealing effect of the invention is better.

Description

Double-conical hydraulic valve

Technical Field

The invention relates to a valve, in particular to a double-cone hydraulic valve.

Background

Valves are plumbing accessories used to open and close a pipe, control flow direction, regulate and control parameters of the transport medium (temperature, pressure and flow). According to their function, they can be classified into shut-off valves, check valves, regulating valves, and the like. The valve is a control part in a fluid conveying system and has the functions of stopping, adjusting, guiding, preventing counter flow, stabilizing pressure, shunting or overflowing and relieving pressure and the like. Valves used in fluid control systems range in variety and size from the simplest shut-off valves to the variety of valves used in extremely complex autonomous systems. The valve can be used for controlling the flow of various types of fluids such as air, water, steam, various corrosive media, slurry, oil products, liquid metal, radioactive media and the like.

Chinese patent CN201710891751.0 discloses a double-cone hydraulic valve, which is composed of four main parts, namely, a hydraulic kinetic energy system device, a hydraulic telescopic cone switch device, a right hydraulic oil cavity, and a hydraulic telescopic cone switch device, and is characterized in that: the connection relation of the four parts is that the hydraulic kinetic energy system device is connected by screws, and the right part of the conical head switch device, the hydraulic oil cavity and the left part of the hydraulic telescopic conical head switch device are connected by sealing rings.

The flexible conical head switching device of fluid pressure type in the above-mentioned patent document is right and flexible conical head switching device of fluid pressure type is left because it utilizes the inner wall in close contact with of brass conical head and toper shell to realize that the valve is closed, and brass conical head and toper shell all need the high accuracy just can be fine to cooperate, and closed in-process can take place the rigidity striking, cause the damage of brass conical head and toper shell easily and lead to the seepage.

Disclosure of Invention

In view of this, the invention provides a double-cone hydraulic valve which has a good sealing effect and is not easy to damage a hydraulic telescopic conical head opening and closing device.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a biconical fluid pressure type valve, wherein, the flexible cone head switching device of fluid pressure type of biconical fluid pressure type valve comprises the ring flange of shell and connection center connection pad, the inside of shell is equipped with a hydraulic pressure oil cylinder, the periphery of hydraulic pressure oil cylinder with form the hydraulic pressure oil pocket between the inner wall of shell, the piston rod sliding fit of hydraulic pressure oil cylinder and a piston, just the hydraulic pressure oil cylinder with be equipped with a plurality of sealing washer between the piston rod, the end of the piston rod of piston is equipped with the base, and an end cover passes through a screw fixed connection and is in on the terminal surface of base, the base with be equipped with the sealing head between the end cover, when the valve is closed, the piston rod outwards stretches out and makes the outer peripheral face of sealing head with the inner wall in close contact with of the conical duct of shell prevents that liquid from getting.

Furthermore, be equipped with a plurality of second annular lip, a third annular lip and a fourth annular lip on the outer peripheral face of sealing head, the fourth annular lip is located the main aspects of sealing head, the third annular lip be located a second annular lip with between the fourth annular lip.

Furthermore, an annular bulge is arranged on the outer peripheral surface of the small end of the sealing head, the plurality of second annular convex lips are positioned between the annular bulge and the third annular convex lip, and the outer peripheral surface of the annular bulge can be in close contact with the inner wall of the conical pipe.

Further, the sealing head includes the base member, be equipped with first cavity, second cavity and a plurality of third cavity in the base member, the embedded first support that is equipped with of first cavity, the embedded second support that is equipped with of second cavity, the embedded pressure prying part that is equipped with of third cavity, first cavity is located the inboard of base member, just the one end of first cavity extends to in the first annular lip of base member, the second cavity is located the middle part of base member, a plurality of third cavity annular distribution are in the outside of base member, annular arch, second annular lip, third annular lip and fourth annular lip all are located on the outer peripheral face of base member.

Furthermore, the first support comprises a round pipe part and a connecting part, the round pipe part and the connecting part are connected through an extending part, an outer annular plate is arranged on the outer peripheral surface of the connecting part, and the round pipe part is located in the first annular convex lip.

Furthermore, the second support includes conical tube portion, infolding portion and interior board of stretching, the infolding portion sets up on the main aspects of conical tube portion, the interior board setting of stretching is in on the tip of conical tube portion, the front end of the interior board of stretching extends to the center.

Furthermore, the prying and pressing piece comprises a vertical plate, an arc plate and an inclined plate, the front end of the vertical plate extends into the annular protrusion, the vertical plate is connected with the arc plate through a first transition part, the arc plate is connected with the inclined plate through a second transition part, the inclined plate is parallel to the outer inclined plane of the base body, and the second transition part protrudes towards the center of the base body.

Furthermore, the large end face of the base body is attached to the left end face of the first cylindrical section of the base, a first hole located in the large end face of the base body is matched with the second cylindrical section of the base, a second hole of the base body, which penetrates through the bottom face of the first hole, is matched with the third cylindrical section of the base, a third hole located in the small end face of the base body is matched with the cylindrical portion of the end cover, wherein an annular groove is formed in the bottom face of the third hole, and the first annular convex lip is formed between the second hole and the annular groove.

Furthermore, a flange is arranged on the outer peripheral surface of the end cover, and the arc surface of the flange is matched with the inner cavity of the arc plate.

Furthermore, an annular clearance groove is formed in the front side of the second annular convex lip.

The technical scheme can show that the invention has the advantages that: the invention has set up the sealing head, the sealing head is made up of basal body, first support, second support and prying and pressing piece, the first support, second support and prying and pressing piece play a supporting role to the basal body, when the valve is closed, the piston rod stretches out outwardly to make the peripheral surface of the sealing head contact closely with inner wall of the conical tube of the outer casing and prevent the liquid from entering the hydraulic oil cavity, thus has promoted the sealing performance of the valve, because the basal body is a rubber part, so the processing accuracy of the conical tube can be reduced properly, and the sealing head and conical tube are in flexible contact in the valve closing process, will not cause the damage to sealing head and conical tube; the worn sealing head can be replaced, so that the service life of the valve is longer.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts. In the drawings:

fig. 1 is a partial cross-sectional view of the present invention.

Fig. 2 is a partial view of fig. 1.

Fig. 3 is another state diagram of fig. 2.

FIG. 4 is a cross-sectional view of the base of the sealing head of the present invention.

Fig. 5 is a cross-sectional view of a first leg of the sealing head of the present invention.

Figure 6 is a cross-sectional view of a second leg of the sealing head of the present invention.

Fig. 7 is an elevation view of a pry member of the sealing head of the present invention.

3 fig. 3 8 3 is 3 a 3 cross 3- 3 sectional 3 view 3 a 3- 3 a 3 of 3 fig. 3 7 3 of 3 the 3 present 3 invention 3. 3

Labeled as: the hydraulic cylinder comprises a housing 1, a flange portion 11, a tapered tube 12, a hydraulic oil cylinder 2, a piston rod 3, a base 4, a first cylindrical section 41, a second cylindrical section 42, a third cylindrical section 43, an end cover 5, a cylindrical portion 51, a flange 52, a circular arc surface 521, a seal head 6, a base body 61, a first hole 611, a second hole 612, a third hole 613, an annular groove 6131, a first annular lip 614, a first cavity 615, a second cavity 616, a third cavity 617, a second annular lip 618, an intermediate groove 6181, an annular protrusion 619, a third annular lip 6110, a fourth annular lip 6111, a first bracket 62, a circular tube portion 621, an extension portion 622, a connecting portion 623, an outer annular plate 624, a second bracket 63, a tapered tube portion 631, an inner folded portion 632, an inner extending plate 633, a prying piece 61864, a vertical plate, a first transition portion 642, a circular arc plate 643, a second transition portion 644, an inclined plate 645, and a screw 645 7.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 8, a hydraulic telescopic cone head switch device of the double-cone hydraulic valve shown in fig. 1 is composed of a housing 1 and a flange plate connected with a central connection plate, a hydraulic oil cylinder 2 is arranged inside the housing 1, a hydraulic oil cavity is formed between the periphery of the hydraulic oil cylinder 2 and the inner wall of the housing 1, the hydraulic oil cylinder 2 is in sliding fit with a piston rod 3 of a piston, a plurality of sealing rings are arranged between the hydraulic oil cylinder 2 and the piston rod 3, a base 4 is arranged at the tail end of the piston rod 3 of the piston, an end cover 5 is fixedly connected to the end surface of the tail end of the base 4 through a screw 7, a sealing head 6 is arranged between the base 4 and the end cover 5, and after long-time use, the worn sealing head 6 can be replaced, so that the service life of the valve is longer, as shown in fig. 3, when the valve is closed, the piston rod 3 extends outwards to enable the peripheral surface of the sealing head 6 to be in close contact with the inner wall of the conical tube 12 of the shell 1, so that liquid is prevented from entering a hydraulic oil cavity.

As shown in fig. 3 and 4, the sealing head 6 includes a base 61, a first cavity 615, a second cavity 616 and a plurality of third cavities 617 are arranged in the base 61, the first cavity 615 is provided with a first support 62 in an embedded manner, the second cavity 616 is provided with a second support 63 in an embedded manner, the third cavities 617 are provided with prying parts 64 in an embedded manner, the first cavity 615 is located on the inner side of the base 61, one end of the first cavity 615 extends into the first annular lip 614 of the base 61, the second cavity 616 is located in the middle of the base 61, the plurality of third cavities 617 are distributed on the outer side of the base 61 in an annular manner, and the first support 62, the second support 63 and the prying parts 64 can all support the base 61.

Preferably, the third cavity 617 may be 3, 6 or 9.

In this embodiment, there are 6 third cavities 617, that is, there are 6 prying parts 64, and the prying part 64 has the best supporting effect on the base 61.

As shown in fig. 2 and 4, the large end surface of the base body 61 is attached to the left end surface of the first cylindrical section 41 of the base 4, the first hole 611 located on the large end surface of the base body 61 is matched with the second cylindrical section 42 of the base 4, the second hole 612 of the base body 61 penetrating through the bottom surface of the first hole 611 is matched with the third cylindrical section 43 of the base 4, and the third hole 613 located on the small end surface of the base body 61 is matched with the cylindrical portion 51 of the end cap 5, wherein an annular groove 6131 is provided on the bottom surface of the third hole 613, and the first annular protruding lip 614 is formed between the second hole 612 and the annular groove 6131.

As shown in fig. 3 and 4, a plurality of second annular lips 618, a third annular lip 6110 and a fourth annular lip 6111 are disposed on the outer peripheral surface of the base body 61, an annular clearance groove 6181 is disposed on the front side of the second annular lip 618, the fourth annular lip 6111 is located at the large end of the sealing head 6, the third annular lip 6110 is located between the second annular lip 618 and the fourth annular lip 6111, an annular protrusion 619 is disposed on the outer peripheral surface of the small end of the base body 61, a plurality of second annular lips 618 are located between the annular protrusion 619 and the third annular lip 6110, the outer peripheral surface of the annular protrusion 619 can be in close contact with the inner wall of the tapered tube 12, the annular protrusion 619, the second annular lip 618, the third annular lip 6110 and the fourth annular lip 6111 are all located on the outer peripheral surface of the base body 61, and since the base body 61 is a rubber member, therefore, the machining precision of the conical tube 12 can be properly reduced, and the sealing head 6 is in flexible contact with the conical tube 12 in the valve closing process, so that the sealing head 6 and the conical tube 12 cannot be damaged.

In this embodiment, there are 5 second annular lips 618, and when the valve is closed, the outer peripheral surface of the second annular lip 618 is attached to the inner wall of the tapered tube 12 most tightly, so that the sealing effect of the valve is the best.

As shown in fig. 5, the first bracket 62 includes a circular tube 621 and a connecting portion 623, the circular tube 621 and the connecting portion 623 are connected by an extending portion 622, an outer annular plate 624 is disposed on the outer peripheral surface of the connecting portion 623, and the circular tube 621 is located in the first annular lip 614.

As shown in fig. 6, the second bracket 63 includes a conical tube portion 631, an inward folded portion 632, and an inward extending plate 633, the inward folded portion 632 being provided on a large end of the conical tube portion 631, the inward extending plate 633 being provided on a small end of the conical tube portion 631, and a front end of the inward extending plate 633 extending toward the center.

As shown in fig. 7 and 8, the prying member 64 includes a vertical plate 641, an arc plate 643 and a sloping plate 645, a front end of the vertical plate 641 extends into the annular protrusion 619, the vertical plate 641 and the arc plate 643 are connected by a first transition portion 642, the arc plate 643 and the sloping plate 645 are connected by a second transition portion 644, an inner cavity of the arc plate 643 is matched with the arc surface 521 of the flange 52 on the outer peripheral surface of the cylindrical portion 51, the sloping plate 645 is parallel to the outer inclined surface of the base body 61, and the second transition portion 644 protrudes toward the center of the base body 61.

In the invention, when the piston rod 3 extends outwards, the base 4 and the end cover 5 with the sealing head 6 are pushed to move towards the direction of the valve port, and the valve is closed, so that the peripheral surface of the sealing head 6 is in close contact with the inner wall of the conical pipe 12 to prevent liquid from entering a hydraulic oil cavity, and the problem of liquid leakage is prevented, and the sealing head and the conical pipe cannot be damaged because the base body 61 is a rubber piece.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A double-cone hydraulic valve is characterized in that a hydraulic telescopic conical head switch device of the double-cone hydraulic valve is composed of a shell (1) and a flange plate connected with a central connection plate, a hydraulic oil cylinder (2) is arranged inside the shell (1), a hydraulic oil cavity is formed between the periphery of the hydraulic oil cylinder (2) and the inner wall of the shell (1), the hydraulic oil cylinder (2) is in sliding fit with a piston rod (3) of a piston, a plurality of sealing rings are arranged between the hydraulic oil cylinder (2) and the piston rod (3), a base (4) is arranged at the tail end of the piston rod (3) of the piston, an end cover (5) is fixedly connected to the end face of the tail end of the base (4) through a screw (7), a sealing head (6) is arranged between the base (4) and the end cover (5), and when the valve is closed, the piston rod (3) extends outwards to enable the peripheral surface of the sealing head (6) to be in close contact with the inner wall of the conical pipe (12) of the shell (1) to prevent liquid from entering a hydraulic oil cavity, the sealing head (6) comprises a base body (61), a first cavity (615), a second cavity (616) and a plurality of third cavities (617) are arranged in the base body (61), a first support (62) is embedded in the first cavity (615), a second support (63) is embedded in the second cavity (616), a prying and pressing piece (64) is embedded in the third cavities (617), the first cavity (615) is located on the inner side of the base body (61), one end of the first cavity (615) extends into the first annular convex lip (614) of the base body (61), the large end face of the base body (61) is attached to the left end face of the first cylindrical section (41) of the base (4), a first hole (611) on the large end face of the base body (61) is matched with the second cylindrical section (42) of the base (4), a second hole (612) of the base body (61) penetrating through the bottom face of the first hole (611) is matched with the third cylindrical section (43) of the base (4), a third hole (613) on the small end face of the base body (61) is matched with the cylindrical portion (51) of the end cover (5), an annular groove (6131) is formed in the bottom face of the third hole (613), a first annular convex lip (614) is formed between the second hole (612) and the annular groove (6131), the second cavity (616) is located in the middle of the base body (61), a plurality of third cavities (617) are annularly distributed on the outer side of the base body (61), and a plurality of second annular convex lips (618) and a plurality of annular convex lips are arranged on the outer peripheral face (6) of the sealing head, A third annular lip (6110) and a fourth annular lip (6111), the fourth annular lip (6111) is located the main aspects of the sealing head (6), the third annular lip (6110) is located a second annular lip (618) and between the fourth annular lips (6111), an annular bulge (619) is arranged on the outer peripheral surface of the small end of the sealing head (6), a plurality of second annular lips (618) are located the annular bulge (619) and between the third annular lips (6110), the outer peripheral surface of the annular bulge (619) can be in close contact with the inner wall of the tapered tube (12), the annular bulge (619), the second annular lip (618), the third annular lip (6110) and the fourth annular lip (6111) are all located on the outer peripheral surface of the base body (61), the first support (62) comprises a round tube part (621) and a connecting part (623), the round pipe part (621) and the connecting part (623) are connected through an extending part (622), an outer annular plate (624) is arranged on the outer peripheral surface of the connecting part (623), the round pipe part (621) is positioned in the first annular protruding lip (614), the second support (63) comprises a conical pipe part (631), an inward folding part (632) and an inward extending plate (633), the inward folding part (632) is arranged on the large end of the conical pipe part (631), the inward extending plate (633) is arranged on the small end of the conical pipe part (631), the front end of the inward extending plate (633) extends towards the center, the prying and pressing part (64) comprises a vertical plate (641), an arc plate (643) and a sloping plate (645), the front end of the vertical plate (641) extends into the annular protrusion (619), and the vertical plate (641) and the arc plate (643) are connected through a first transition part (642), the circular arc plate (643) and the inclined plate (645) are connected through a second transition portion (644), the inclined plate (645) is parallel to an outer inclined surface of the base body (61), and the second transition portion (644) protrudes towards the center direction of the base body (61); a flange (52) is arranged on the outer peripheral surface of the end cover (5), and an arc surface (521) of the flange (52) is matched with an inner cavity of the arc plate (643); an annular spacing groove (6181) is formed in the front side of the second annular convex lip (618).