Water pressure tool sealing structure

Abstract

The utility model belongs to the technical field of sealing structures, and particularly relates to a water pressure tool sealing structure. The device comprises a cylinder, and a cylinder flange is arranged at the end of the cylinder; annular grooves are formed in the outer ends of the stuffing box inner walls. The cover plate is connected to the side, away from the barrel, of the stuffing box, a barrel section extending into the annular groove is arranged at the end of the cover plate, and at least one stepped groove is formed in the inner ring of the barrel section. The first sealing piece is filled in the stepped groove in a sealing manner; the second sealing piece is hermetically filled between the end part of the shell ring and the bottom of the annular groove; and the third sealing piece is filled between the second sealing piece and the groove bottom of the annular groove. The hydraulic tool is used for solving the problem that a hydraulic tool is poor in sealing effect easily. The stepped groove can also extrude the second sealing piece and the first sealing piece during tightening to jointly extrude and tighten, meanwhile, the third sealing piece with plastic deformation is arranged at the bottom of the annular groove, and the third sealing piece deforms when being extruded and fills surrounding gaps, so that a good sealing effect is achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sealing structure technical field, concretely relates to a water pressure frock sealing structure. BACKGROUND

[0002] Water pressure frock is special tool device for water pressure detection, including pressure bearing component, sealing component and connecting interface etc., wherein the sealing design of water pressure frock is the key.

[0003] At present, the stuffing box in water pressure frock usually seals through setting up multiple packing or rubber sealing ring, installs the packing at the interface of frock, makes the elastic deformation of sealing ring or packing through the mode such as tightening connecting bolt, to fill the connecting gap, reaches good sealing effect. But this sealing mode has certain limitation when facing high pressure environment, and the sealing effect is not good enough. UTILITARY MODEL CONTENTS

[0004] The technical problem to be solved by the utility model lies in overcoming the defects of prior art, providing a water pressure frock sealing structure for solving the problem of poor sealing effect of water pressure frock.

[0005] The technical scheme for solving the above technical problem of the utility model is as follows: a water pressure frock sealing structure, comprising:

[0006] A cylinder body, the end of the cylinder body is provided with a cylinder flange;

[0007] A stuffing box is connected with the cylinder flange, and an annular groove is formed on the outer end of the inner wall of the stuffing box;

[0008] A cover plate is connected to the side of the stuffing box away from the cylinder body, and the end of the cover plate is provided with a cylinder section extending into the annular groove, and at least one stepped groove is formed in the inner ring of the cylinder section;

[0009] A plurality of first sealing elements are sealed and filled in the stepped groove;

[0010] A plurality of second sealing elements are sealed and filled between the end of the cylinder section and the bottom of the annular groove.

[0011] At least one third sealing element is a plastic sealing element, which is filled between the second sealing element and the bottom of the annular groove.

[0012] Compared with the prior art, the above technical scheme has the following beneficial effects:

[0013] By setting the annular groove on the inner wall of the stuffing box, the second sealing element is pressed against the second sealing element by the matching cylinder segment extending into the annular groove to form a seal, and the first sealing element is also filled in the stepped groove formed on the cylinder segment, the stepped groove can also extrude the second sealing element and the first sealing element when being tightened, and extrude together, and the third sealing element with plastic deformation is arranged at the bottom of the annular groove, which is deformed when being extruded and filled into the surrounding gap, thereby achieving better sealing effect.

[0014] Based on the above technical solutions, the embodiments of the present application can also be improved as follows:

[0015] In an embodiment, the outer circle of the bottom of the annular groove is inclined towards the direction close to the cylinder segment, and the third sealing element is arranged close to the inner circle of the bottom of the annular groove.

[0016] By setting the bottom of the annular groove to be inclined, the sealing element can generate a force towards the inside when being pressed, so that the extrusion sealing effect is better.

[0017] In an embodiment, the outer circle of the end of the cylinder segment and the bottom of the stepped groove is inclined towards the direction close to the cylinder body.

[0018] By setting the end of the cylinder segment and the stepped groove to be inclined, the first sealing element and the second sealing element can also be inclined towards the inside, so that the sealing effect is better.

[0019] In an embodiment, the first sealing element and the second sealing element are provided with a convex rib close to one side of the bottom of the annular groove, and a concave rib matched with the convex rib away from the other side of the bottom of the annular groove.

[0020] By setting the convex rib and the concave rib on the inner and outer sides of the sealing element respectively, the multi-layer sealing element can not be dislocated when being extruded, and can be better fitted, so that the sealing effect is good.

[0021] In an embodiment, the first sealing element is filled with a plastic ring inside.

[0022] By using the plastic ring therein, the plastic ring is flattened and extends to the inner and outer sides of the annular groove when being extruded, so that the surrounding gap is better sealed.

[0023] In an embodiment, a sealing ring is arranged between the flange of the cylinder body and the stuffing box, and a sealing groove is arranged around the end surface of the stuffing box for embedding the sealing ring.

[0024] In an embodiment, the end surface of the flange of the cylinder body is provided with a convex stopper in contact with the sealing ring, and the outer circle of the sealing groove extends outwardly to form a concave stopper matched with the surface of the convex stopper. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 It is a structural schematic diagram of the present application.

[0027] Figure 2 It is Figure 1 It is an enlarged structural schematic diagram of position A in the figure.

[0028] Figure 3 It is Figure 1 It is an enlarged structural schematic diagram of position B in the figure.

[0029] Reference signs:

[0030] 1, cylinder; 2, cylinder flange; 3, stuffing box; 4, cover plate; 5, annular groove; 6, cylinder section; 7, stepped groove; 8, first sealing element; 9, second sealing element; 10, third sealing element;

[0031] 11, convex rib; 12, concave rib; 13, plastic ring; 14, sealing ring; 15, sealing groove; 16, convex stop; 17, concave stop. Specific embodiments

[0032] The embodiments of the technical solutions of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0033] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present application should be understood as the usual meaning understood by the skilled person in the field of the present application.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0035] In addition, the terms "first", "second" and the like are used only for descriptive purposes, and cannot be construed as indicating or implying relative importance or implying the number of the technical features indicated. In the description of the utility model, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0036] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0037] As shown in Figure 1 The utility model provides a kind of water pressure tool sealing structure, it includes: cylinder 1, stuffing box 3 and cover plate 4, cylinder 1 is horizontal cylinder, specifically with cylinder 1 right end is specifically described.

[0038] As shown in Figure 1 、 2 The end of cylinder 1 is provided with cylinder flange 2, stuffing box 3 is connected with the cylinder flange 2, the outer end of the inner wall of the stuffing box 3 is formed with annular groove 5, cover plate 4 is connected to the side of the stuffing box 3 away from the cylinder 1, the end of the cover plate 4 is provided with cylinder section 6 inserted into the annular groove 5, at least one stepped groove 7 is opened in the inner ring of the cylinder section 6, a plurality of first sealing elements 8 are sealed and filled in the stepped groove 7, the first sealing element 8 is extruded to left by the end face of stepped groove 7, a plurality of second sealing elements 9 are sealed and filled between the end of the cylinder section 6 and the groove bottom of the annular groove 5, the second sealing element 9 is extruded to left by the end face of cylinder section 6, at least one third sealing element 10, the third sealing element 10 is plastic sealing element, filled between the second sealing element 9 and the groove bottom of the annular groove 5, the third sealing element 10 can be made of red copper ring, etc., and deforms to fill the surrounding gap when being pressed.

[0039] The first sealing element 8, the second sealing element 9 and the third sealing element 10 can be spiral or annular.

[0040] By setting annular groove 5 on the inner wall of stuffing box 3, the second sealing element 9 is formed by the matching cylinder section 6 inserted into annular groove 5, and the first sealing element 8 is also filled in the stepped groove 7 formed on the cylinder section 6, the stepped groove 7 can also extrude the second sealing element 9 and the first sealing element 8 when tightening, and extrude and tighten together, and the third sealing element 10 with plastic deformation is arranged on the groove bottom of annular groove 5, which deforms when extruded and fills the surrounding gap, thereby achieving better sealing effect.

[0041] In order to improve the sealing effect, the outer circle of the groove bottom of the annular groove 5 is inclined towards the direction close to the cylinder segment 6, and the third sealing element 10 is arranged at the position close to the inner circle of the groove bottom of the annular groove 5. By arranging the groove bottom of the annular groove 5 to be inclined, the sealing element can generate a force close to the inner side when being pressed, so that the extrusion sealing effect is better. Meanwhile, the third sealing element 10 is located at the inner circle of the groove bottom of the annular groove 5. Since the groove bottom of the annular groove 5 is inclined, the inner circle has a certain space. By arranging the third sealing element 10 at this position, the third sealing element 10 can be filled in the position close to the inner circle when being pressed. By the cooperation of the inclination and the third sealing element 10, better sealing can be formed at the groove bottom of the annular groove 5.

[0042] The outer circle of the end of the cylinder segment 6 and the outer circle of the bottom of the stepped groove 7 are inclined towards the direction close to the cylinder body 1. Further, the end of the cylinder segment 6 and the stepped groove 7 are both arranged to be inclined, so that the first sealing element 8 and the second sealing element 9 can also be inclined towards the inner side, and the sealing effect is better.

[0043] In order to ensure that the sealing elements can be better fitted when being pressed, the first sealing element 8 and the second sealing element 9 are provided with a convex rib 11 close to one side of the groove bottom of the annular groove 5, and are provided with a concave rib 12 matching the convex rib 11 away from the other side of the groove bottom of the annular groove 5. By arranging the convex rib 11 and the concave rib 12 at the inner and outer sides of the sealing elements respectively, the multiple sealing elements can not be dislocated when being pressed, the displacement of the adjacent sealing elements in the radial direction is reduced, the fitting effect of the adjacent sealing elements is better, and thus the sealing effect is good.

[0044] Further, the first sealing element 8 is filled with a plastic ring 13, and the plastic ring 13 is coated with an elastic material. When being pressed, the plastic ring 13 is flattened and extends to the inner and outer sides of the annular groove 5, so that the gaps around are better sealed. The elastic material outside can better fill the gaps between the inner and outer sides.

[0045] As shown in Figure 3 In order to improve the sealing between the cylinder body 1 and the stuffing box 3, the sealing ring 14 is arranged between the cylinder flange 2 and the stuffing box 3. The end surface of the stuffing box 3 is provided with a sealing groove 15 for embedding the sealing ring 14. By limiting the sealing ring 14 through the sealing groove 15, the sealing ring 14 can better fit and not deviate.

[0046] The end surface of the cylinder flange 2 is provided with a convex stop 16 in contact with the sealing ring 14. The outer circle of the sealing groove 15 extends outward to form a concave stop 17 matching the circumferential surface of the convex stop 16. By contacting the convex stop 16 with the sealing ring 14, the sealing effect is good. Meanwhile, the convex stop 16 and the concave stop 17 are conveniently positioned and installed.

[0047] Finally, it should be noted that: the above embodiments are used to illustrate the technical solutions of the present application, but not limited to them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A sealing structure for a hydraulic pressure fixture, characterized in that, include: A cylindrical body, wherein a cylindrical body flange is provided at the end of the cylindrical body; A stuffing box is connected to the flange of the cylinder, and an annular groove is formed at the outer end of the inner wall of the stuffing box. A cover plate is connected to the side of the stuffing box away from the cylinder body. The end of the cover plate is provided with a cylindrical section that extends into the annular groove. The inner circle of the cylindrical section is provided with at least one stepped groove. Several first seals are sealed and filled in the stepped groove; Several second seals are used to seal and fill the space between the end of the cylindrical section and the bottom of the annular groove; At least one third seal, which is a plastic seal, is filled between the second seal and the bottom of the annular groove.

2. The sealing structure of the hydraulic fixture according to claim 1, characterized in that, The outer ring of the bottom of the annular groove is inclined toward the direction close to the cylindrical section, and the third sealing element is disposed at the bottom of the annular groove near its inner ring.

3. The sealing structure of the hydraulic fixture according to claim 2, characterized in that, The outer ring at the end of the cylindrical section and the outer ring at the bottom of the stepped groove are inclined toward the direction close to the cylindrical body.

4. The sealing structure of the hydraulic fixture according to claim 1, characterized in that, The first and second seals are provided with a raised ridge on the side near the bottom of the annular groove, and a concave ridge matching the raised ridge on the side away from the bottom of the annular groove.

5. The sealing structure of the hydraulic fixture according to claim 4, characterized in that, The first seal is filled with a plastic ring.

6. The sealing structure of the hydraulic fixture according to claim 1, characterized in that, A sealing ring is provided between the cylindrical flange and the stuffing box, and a sealing groove for embedding the sealing ring is provided on the end face of the stuffing box.

7. The sealing structure of the hydraulic fixture according to claim 6, characterized in that, The end face of the cylinder flange is provided with a raised stop that contacts the sealing ring, and the outer ring of the sealing groove extends outward to form a recessed stop that matches the circumference of the raised stop.

Images