CN115949745A - Self-tightening sealing ring driven by delayed expanding agent - Google Patents

Abstract

The invention discloses a self-tightening sealing ring driven by a delayed expanding agent, which comprises a sealing ring body, wherein a soft sealing body is arranged on the radial outer side of the sealing ring body, the outer side surface of the soft sealing body is a first sealing ring surface, one surface of the soft sealing body, which is close to an inserting pipe, is a second sealing ring surface, a pressure surface is arranged on the radial inner side of the sealing ring body, the sealing ring body is provided with a rotary connecting part, the rotary connecting part is connected with the end surface of the inserting pipe, the end surface of the inserting pipe is provided with a plurality of counter bores, and the expanding agent and a piston rod are arranged in the counter bores. The expansion delaying agent drives the piston rod to jack the sealing ring body to turn outwards, and the first sealing ring surface is in contact with the inner wall of the bearing pipe to generate pre-pressure. The second sealing ring surface is in contact with the end face of the inserting pipe to generate pre-pressure, the compression surface is utilized to enable the sealing to be more compact when a medium is introduced into the pipe so as to realize self-tightening, and the sealing ring has good adaptability to the problems of misalignment of the inserting part of the pipe, large gap, insufficient surface cleanliness and the like.

Description

Self-tightening sealing ring driven by delayed expanding agent

Technical Field

The invention belongs to the technical field of sealing rings, and particularly relates to a self-tightening sealing ring driven by a delayed expanding agent.

Background

PVC pipelines are widely used in the field of water delivery, are convenient to install and are usually connected by bell and spigot joints; expanding one end of the bearing pipe, directly inserting the inserting pipe into the expanding end head, and arranging sealing and locking connection at the joint part; the sealing performance of the socket determines whether the pipeline can smoothly complete one of the key factors of the conveying task.

Patent CN201520343854.X discloses a PVC pipeline connection structure, adopts built-in connection form, and the hole enlargement section protrudes a circle of arc structure, is called "R mouth" to use sealing washer and retaining member in R mouth department. The sealing ring of the type has a complex structure, the sealing ring and the locking piece interact in a limited space of the R port, and the axial displacement of the locking piece influences the matching of the sealing piece and the cone port. Under the condition that the pipeline bears axial force and internal pressure, the R port deforms, and the sealing effect of the socket joint is directly influenced.

Based on above background, design novel sealing washer, solve the sealed and locking mechanism mutual interference's of PVC pipeline grafting problem, solve the problem that current PVC pipeline grafting position warp the back and influence sealed effect, have realistic meaning and application prospect.

Disclosure of Invention

In order to solve the problems, the invention provides a self-tightening sealing ring driven by a delayed expanding agent, wherein a top rotating part is used for propping against a sealing ring body to turn outwards, a first sealing ring surface is contacted with the inner wall of a bearing pipe and generates pre-pressure, a second sealing ring surface is contacted with the end face of an inserting pipe and generates pre-pressure, and a compression surface is utilized to ensure that the sealing is tighter when a medium is introduced into the pipe, so that the self-tightening is realized.

The embodiment of the invention is realized by the following technical scheme:

a delayed expansion agent actuated self-tightening seal ring, comprising:

the sealing ring body is arranged on the end face of the plug pipe and is provided with a shaft end face attached to the end face of the plug pipe, the radial outer side face of the sealing ring body is a first sealing ring surface, and a second sealing ring surface is arranged between the first sealing ring surface and the shaft end face;

the rotary connecting part is arranged on the axial end surface of the sealing ring body and can be rotatably connected with the inserting pipe; and

and the jacking and rotating part is arranged at the end part of the inserting pipe and used for jacking and connecting the end surface of the shaft so as to ensure that the sealing ring body overturns outwards with the rotating connecting part as a base point, and when the sealing ring body overturns outwards with the rotating connecting part as the base point, the first sealing ring surface is tightly attached to the inner wall of the bearing pipe, and the second sealing ring surface is tightly attached to the end surface of the inserting pipe.

The jacking and rotating part comprises an expanding agent and a piston rod, the end face of the insertion pipe is provided with a counter bore matched with the piston rod, the piston rod is movably arranged in the counter bore, the expanding agent is arranged in the counter bore, and when the expanding agent is in an expansion state, the expanding agent drives the piston rod to extend out of the counter bore to jack the sealing ring to be turned outwards.

A pressure receiving surface is also arranged on the radial inner side of the sealing ring body; when the medium is introduced into the adapting pipe, the medium presses the pressure-bearing surface to deform and extrude the sealing ring body part in the gap between the inserting pipe and the adapting pipe.

Rotate connecting portion including rotating piece and chucking spare, rotate a rotatable coupling sealing washer body, the chucking spare is connected with rotating the piece, and the pipe terminal surface of pegging graft disposes with chucking spare assorted draw-in groove, the chucking spare gomphosis sets up in this draw-in groove.

The first sealing ring surface is a conical surface, the larger end of the first sealing ring surface is connected with the second sealing ring surface, and the smaller end of the first sealing ring surface extends towards the direction far away from the end surface of the inserting pipe and is connected with the pressure-receiving surface.

The second sealing ring surface is a conical surface, the small-diameter end of the second sealing ring surface extends to the continuous rotation connecting portion, and the large-diameter end of the second sealing ring surface extends to be connected with the first sealing ring surface.

A groove is arranged between the second sealing ring surface and the rotary connecting surface and is connected with the rotary connecting part.

The compression surface is an arc-shaped annular surface.

The shaft end face is provided with a top plate, and the top plate is arranged corresponding to the piston rod.

The foaming agent is a delayed foaming agent.

The technical scheme of the embodiment of the invention at least has the following advantages and beneficial effects:

(1) According to the invention, the sealing and internal locking devices for the PVC pipeline plug connection are separately designed, namely, the clamping groove for connecting and fixing is arranged on the end surface of the plug pipe, the first sealing ring surface and the second sealing ring surface on the outer side of the sealing ring body are used for sealing, and the plug connection and the sealing of the sealing ring body are not interfered with each other, so that the design is more flexible.

(2) The end face of the splicing pipe is provided with the counter bore, the expansion agent and the piston rod are arranged in the counter bore, the expansion agent is utilized to expand and drive the piston rod to extend out, the piston rod is abutted against the sealing ring body to enable the sealing ring body to turn outwards by taking the rotary connecting part as a base point, so that the first sealing ring surface is tightly attached to the inner wall of the adapting pipe, the second sealing ring surface is tightly attached to the end face of the splicing pipe, and the sealing between the splicing pipe and the adapting pipe is realized.

(3) The pressure-bearing surface is arranged, so that when a medium is introduced into the pipe to generate pressure, the pressure-bearing surface is pressed under the action of the pressure-bearing surface, so that the soft sealing body is partially extruded in a gap between the splicing pipe and the adapting pipe, and the soft sealing body is pressed more and more tightly, and the self-sealing effect is realized.

(4) According to the invention, the pipeline is inserted and sealed at the shaft end of the insertion pipe, the first sealing ring surface is matched with the inner wall of the bearing pipe, and the axial relative displacement of the insertion pipe and the bearing pipe does not influence the sealing, so that the insertion pipe is conveniently inserted into the bearing pipe for sealing.

(5) Compared with the existing R-shaped inner sealing ring of the PVC pipeline, the sealing ring has a simple structure and is convenient to process;

(6) According to the invention, the sealing ring is in a reducing state when being installed, so that the sealing ring can be conveniently implanted into the bell and spigot, and the sealing ring is not contacted with the adapting pipe when being installed, so that the sealing ring is prevented from flanging;

(7) The invention drives the sealing ring to expand outwards by the delayed expanding agent, and the sealing ring and the sealing surface generate pre-pressure, thereby having good adaptability to the problems of misalignment of the splicing part of the pipeline, large gap, insufficient surface cleanliness and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.

FIG. 1 is a schematic view of the present invention in a natural state;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic view of the present invention showing the structure of the expanding agent when expanded;

FIG. 4 is a schematic structural view of the present invention after expansion deformation under the restraint of the adapting pipe when the expanding agent expands;

fig. 5 is a schematic view of the present invention after pressure application.

Icon: 1-a sealing ring body, 101-a first sealing ring surface, 102-a second sealing ring surface, 103-a pressure-bearing surface, 104-a shaft end surface, 105-a groove, 2-a rotary connecting part, 21-a rotary part, 22-a clamping part, 3-a counter bore, 4-an expanding agent, 5-a piston rod, 6-a clamping groove, 7-a top plate, 8-an inserting pipe and 9-a bearing pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the present invention is used, the description is merely for convenience of describing the present invention and simplifying the description, but the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and operation, and thus, cannot be understood as the limitation of the present invention.

In the description of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "configured," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Examples

Referring to fig. 1-5, the present embodiment provides a self-tightening sealing ring driven by a delayed expanding agent, which includes a sealing ring body 1, a rotary connection part 2 and a top rotary part,

the sealing ring body 1 is of an annular structure, the sealing ring body 1 is configured on the end surface of the insertion pipe 8, the sealing ring body 1 is provided with a shaft end surface 104 which is attached to the end surface of the insertion pipe 8, the radial outer side surface of the sealing ring body 1 is a first sealing ring surface 101, and a second sealing ring surface 102 is arranged between the first sealing ring surface 101 and the shaft end surface 104; the sealing ring body 1 in this embodiment is made of a rubber material, and has a certain deformation capability.

The rotary connecting part 2 is arranged on the shaft end surface 104 of the sealing ring body 1, the rotary connecting part 2 can be rotatably connected with the splicing pipe 8, the sealing ring body 1 can be outwards turned by using the rotary connecting part 2 as a base point, and the rotary connecting part 2 is used for reducing the diameter of the sealing ring body 1 during installation, so that the splicing pipe 8 can be conveniently inserted into the adapting pipe 9 for sealing.

The top rotating part is arranged at the end part of the inserting pipe 8, the distance between the top rotating part and the axis is less than the distance between the rotating connecting part 2 and the axis of the inserting pipe 8 by taking the axis of the inserting pipe 8 as the center, so that when the top rotating part pushes the end surface 104 of the connecting shaft, the sealing ring body 1 is overturned outwards by taking the rotating connecting part 2 as a base point, and when the sealing ring body 1 is overturned outwards by taking the rotating connecting part 2 as a base point, the first sealing ring surface 101 is tightly attached to the inner wall of the bearing pipe 9, and the second sealing ring surface 102 is tightly attached to the end surface of the inserting pipe 8, thereby realizing the sealing between the inserting pipe 8 and the bearing pipe 9.

Referring to the figure, the jacking portion comprises an expanding agent 4 and a piston rod 5, in order to ensure the jacking effect of the jacking portion on the sealing ring body 1, the number of the jacking portion is at least two, the jacking portion is arranged in a centrosymmetric manner by taking the axis of the insertion pipe 8 as the center, the end face of the insertion pipe 8 is provided with a counter bore 3 matched with the piston rod 5, the piston rod 5 is of a cylindrical structure, the end face of the piston rod 5 close to one side of the expanding agent 4 is a plane or a groove 105, and the end part of the piston far away from one side of the expanding agent 4 is spherical; the expanding agent 4 and the piston rod 5 are arranged on the same straight line, the expanding agent 4 is positioned on the inner side of the counter bore 3, and the piston rod 5 is placed after the expanding agent 4 is filled in the counter bore 3. Before the expanding agent 4 foams, the piston completely retracts into the counter bore 3, when the expanding agent 4 foams and expands, the piston rod 5 abuts against the sealing ring body 1 to enable the sealing ring body to turn outwards by taking the rotary connecting part 2 as a base point, so that the first sealing ring surface 101 is tightly attached to the inner wall of the adapting pipe, the second sealing ring surface 102 is tightly attached to the end surface of the inserting pipe 8, and the self-sealing after the inserting pipe 8 is inserted into the adapting pipe 9 is realized by utilizing the delayed expansion effect of the expanding agent 4.

In this embodiment, a pressure receiving surface 103 is further disposed on the radially inner side of the seal ring body 1; when the medium is introduced into the adapting pipe 9, the medium applies pressure to the pressure receiving surface 103 to deform and extrude part of the sealing ring body 1 in the gap between the inserting pipe 8 and the adapting pipe 9, and the pressing is tighter, so that the self-sealing effect is realized. Referring to fig. 1, in order to increase the pressure applied to the sealing ring body 1 when the medium is introduced, the pressure receiving surface 103 is an arc-shaped annular surface, and in other embodiments, the pressure receiving surface 103 is a conical surface.

Referring to fig. 1 and 2, the rotation connecting portion 2 includes a rotation member 21 and a clamping member 22, the rotation member 21 is connected to the seal ring body 1, the clamping member 22 is connected to the rotation member 21, the rotation member 21 can rotate or bend, and the rotation member 21 rotates or bends to realize the rotation eversion of the seal ring body 1; in order to improve the stability of being connected with the grafting pipe 8, the chucking spare 22 of this embodiment is cyclic annular, and 8 terminal surfaces of grafting pipe are configured with the cyclic annular draw-in groove 6 with chucking spare 22 assorted, for further chucking spare 22, the open end of draw-in groove 6 is narrower, the inside broad of draw-in groove 6 sets up, chucking spare 22 gomphosis sets up in this draw-in groove 6. It should be noted that the rotating member 21 and the retainer 22 of the present embodiment are made of rubber materials, and the rotating connecting portion 2 is integrally formed with the seal ring body 1.

Referring to fig. 1, the first sealing ring surface 101 is a conical surface, in other embodiments, the first sealing ring surface 101 is a cylindrical surface or an arc-shaped ring surface, a larger end of the first sealing ring surface 101 is connected to the second sealing ring surface 102, a smaller end of the first sealing ring surface 101 extends in a direction away from the end surface of the plug pipe 8 and is connected to the pressure receiving surface 103, and the conical first sealing ring surface 101 is utilized to make the sealing ring body 1 in a diameter-reduced state in a normal state, so that the sealing ring body 1 can be conveniently inserted into the bearing pipe.

Referring to fig. 1 and 2, in order to facilitate the outward-turning sealing of the sealing ring body 1, the second sealing ring surface 102 is a conical surface, a small-diameter end of the second sealing ring surface 102 extends to the continuous rotation connecting portion 2, and a large-diameter end of the second sealing ring surface 102 extends to connect the first sealing ring surface 101. Further, the second sealing ring surface 102 is provided with a groove 105, the groove 105 is connected with the rotary connection part 2, and the groove 105 facilitates the contact and the compression of the second sealing ring surface 102 and the end surface of the plug pipe 8.

Referring to fig. 1, the shaft end surface 104 is a plane, the shaft end surface 104 is matched with an end surface of the insertion tube 8 to limit the sealing ring body 1, one end of the shaft end surface 104 is connected with the pressure receiving surface 103, the other end of the shaft end surface 104 is connected with the second sealing ring surface 102, the shaft end surface 104 is configured with a top plate 7, the top plate 7 is made of a hard material, the top plate 7 is arranged corresponding to the piston rod 5, and the piston rod 5 is used for enabling the piston rod 5 to be connected with the sealing ring body 1 in a jacking and outwards turning mode.

The expanding agent is a delayed foaming agent, the expanding agent 4 is of a core-shell structure, wherein sodium bicarbonate particles are adopted as a gas generating material for the inner core, the outer shell is formed by nonvolatile matters generated after the oxidized polyethylene wax emulsion is volatilized, and the gas generation of the sodium bicarbonate inner core can be delayed at the temperature higher than the thermal decomposition temperature of the sodium bicarbonate inner core.

Referring to the figure, the joints between the shaft end surface 104 and the pressure receiving surface 103, between the pressure receiving surface 103 and the first sealing ring surface 101, and between the first sealing ring surface 101 and the second sealing ring surface 102 are all provided with arc chamfers.

The principle of the present embodiment is described as follows:

as shown in fig. 1, the rotating member 21 and the clamping member 22 of the seal ring body 1 are inserted into the clamping groove 6 at the end of the insertion pipe 8, and the clamping member 22 is clamped into the clamping groove 6 to fix the seal ring body 1. At this time, the seal ring body 1 is in a diameter-reduced state, an expanding agent 4 is injected into the counterbore 3 at the end of the spigot pipe 8, and the spigot pipe 8 is inserted into the joint portion of the adapter pipe 9 before the expanding agent 4 foams.

As shown in fig. 3, the expanding agent 4 expands, the piston rod 5 is pushed against the top plate 7 under the driving of the expanding agent 4, and the piston rod 5 pushes out the sealing ring body 1 and turns outwards; the sealing ring body 1 is turned outwards by taking the connecting rotating part as a reference; the second sealing ring surface 102 is pressed against the end surface of the plug pipe 8 and the first sealing ring surface 101 is inclined outwards and exceeds the outer diameter of the plug pipe 8.

As shown in fig. 4, under the constraint of the socket 9, the first annular sealing surface 101 abuts against the inner cylindrical surface of the socket, thereby generating a pre-pressure.

As shown in fig. 5, after the pressure is generated by introducing a medium into the adapting pipe 9, the sealing ring body 1 is plugged into a gap between the inserting pipe 8 and the adapting pipe under the action of internal pressure, and the sealing ring body is more and more compressed to realize the self-sealing effect.

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 (10)

1. A delayed expansion agent driven self tightening seal ring comprising:

the sealing ring comprises a sealing ring body, a first sealing ring surface and a second sealing ring surface, wherein the sealing ring body is arranged on the end surface of the plug-in pipe and is provided with a shaft end surface attached to the end surface of the plug-in pipe;

the rotary connecting part is arranged on the axial end surface of the sealing ring body and can be rotatably connected with the inserting pipe; and (c) a second step of,

and the jacking and rotating part is arranged at the end part of the splicing pipe and is used for jacking and connecting the end surface of the shaft so as to ensure that the sealing ring body overturns outwards by taking the rotating connecting part as a base point, and when the sealing ring body overturns outwards by taking the rotating connecting part as the base point, the first sealing ring surface is tightly attached to the inner wall of the bearing pipe, and the second sealing ring surface is tightly attached to the end surface of the splicing pipe.

2. The self-tightening sealing ring driven by the delayed expanding agent as claimed in claim 1, wherein the jacking portion comprises the expanding agent and a piston rod, the end face of the insertion pipe is provided with a counter bore matched with the piston rod, the piston rod is movably arranged in the counter bore, the expanding agent is arranged in the counter bore, and when the expanding agent is in an expanded state, the expanding agent drives the piston rod to extend out of the counter bore to jack the sealing ring to turn outwards.

3. A delayed expansion agent driven self-tightening seal ring according to claim 1 or 2, wherein the radially inner side of the seal ring body is further provided with a pressure receiving surface; when the medium is introduced into the adapting pipe, the medium presses the pressure-bearing surface to deform and extrude the sealing ring body part in the gap between the inserting pipe and the adapting pipe.

4. The delayed expanding agent driven self-tightening sealing ring as claimed in claim 3, wherein the rotary connecting part comprises a rotary part and a clamping part, the rotary part is rotatably connected with the sealing ring body, the clamping part is connected with the rotary part, the end face of the insertion pipe is provided with a clamping groove matched with the clamping part, and the clamping part is embedded in the clamping groove.

5. The delayed expansion agent driven self-tightening seal of claim 1, wherein the first seal ring surface is a conical surface, the larger end of the first seal ring surface is connected to the second seal ring surface, and the smaller end of the first seal ring surface extends away from the end surface of the bayonet tube and is connected to the compression surface.

6. The delayed expansion agent driven self-tightening seal of claim 1, wherein the second seal ring surface is a conical surface, the minor diameter end of the second seal ring surface extending to the rotationally continuous connection, and the major diameter end of the second seal ring surface extending to the first seal ring surface.

7. The delayed expansion agent driven self-tightening seal of claim 6, wherein a groove is provided between the second seal ring surface and the rotating joint surface, the groove being contiguous with the rotating joint.

8. The delayed expansion agent driven self-tightening seal according to claim 3, wherein the pressure receiving surface is an arcuate annular surface.

9. The delayed expansion agent-driven self-tightening seal according to claim 2, wherein the shaft end face is provided with a top plate which is disposed in correspondence with the piston rod.

10. The delayed expansion agent-driven self-tightening seal ring according to claim 2, wherein the foaming agent is a delayed foaming agent.

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