CN215806381U

CN215806381U - Inflatable three-linkage combined sealing packing structure

Info

Publication number: CN215806381U
Application number: CN202122006436.XU
Authority: CN
Inventors: 陈德安; 欧阳帆清; 马华禧; 易溪泉
Original assignee: Hunan Gaoci Control System Technology Co ltd
Current assignee: Hunan Gaoci Control System Technology Co ltd
Priority date: 2021-08-25
Filing date: 2021-08-25
Publication date: 2022-02-11
Anticipated expiration: 2031-08-25

Abstract

The utility model discloses an inflatable three-linkage combined sealing packing structure in the technical field related to a sealing packing structure, which comprises a valve body and a valve rod, wherein the valve rod is arranged at the central position of the valve body, a sealing cavity is formed at the matching position of the valve body and the valve rod, a sealing ring is arranged at the bottom of the sealing cavity, a lower packing seal is arranged above the sealing ring, and a micro cylinder is arranged above the lower packing seal. The valve is provided with the upper packing seal and the lower packing seal which are of the V-shaped structures, the micro cylinder is arranged between the upper packing seal and the lower packing seal, air pressure is formed after the micro cylinder is inflated, the upper packing seal and the lower packing seal are respectively expanded to seal the valve, the deformation quantity of the V-shaped structures can effectively compensate abrasion loss, the long-term use sealing performance is ensured, the air source pressure of the micro cylinder can be adjusted according to needs, the packing gland is fixedly connected with the valve body through the double-threaded screw, and the double-threaded screw is connected, so that the assembly gap can be effectively reduced, and the connection stability is improved.

Description

Inflatable three-linkage combined sealing packing structure

Technical Field

The utility model belongs to the technical field related to a sealing filler structure, and particularly relates to an inflatable three-linkage combined sealing filler structure.

Background

The valve sealing technology is mainly embodied in two aspects, namely static sealing and dynamic sealing, wherein the static sealing generally refers to sealing between two static surfaces, and the sealing method of the static sealing mainly uses a gasket. The dynamic seal mainly refers to the seal of a valve rod, namely, the medium in the valve is prevented from leaking along with the movement of the valve rod, and the sealing method of the dynamic seal mainly uses a stuffing box. The existing packing is filled with rubber O-shaped rings or plastic molding packing in a multi-selection mode, the packing is in clearance fit with the valve rod, the packing is worn in a period of use, the packing box is fixed through a gland fitting bolt in a multi-way mode, single threaded connection is easy to loosen, and the sealing performance of the valve can be affected.

The present invention has been made in view of this situation.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the utility model is to overcome the defects of the prior art, and to solve the technical problem, the utility model adopts the basic concept of the technical scheme that:

the utility model provides a three interlock composite seal packing structures of inflatable, includes valve body and valve rod, the valve rod is installed the central point of valve body puts, the valve body with the cooperation position of valve rod is formed with sealed chamber, the sealing washer is installed to the bottom in sealed chamber, the packing is sealed down to the top of sealing washer is installed, miniature cylinder is installed to the top of packing seal down, the packing is sealed up to the top of miniature cylinder is installed, there is gland in the upper end of valve body through double-end screw fixed mounting.

As a further scheme of the utility model: the valve rod is located install the wedge pin on the external diameter in the valve body, the inside central point of valve body puts and installs the dish board, it is located to seal the intracavity one side of valve body is provided with the groove of colluding for strengthen holistic leakproofness.

As a still further scheme of the utility model: processing has the gland fixed orifices on the gland, the gland fixed orifices is the through-hole, double-end screw's upper end is followed pass in the gland fixed orifices, lock nut is installed to double-end screw's upper end, lock nut can with double-end screw with gland's position lock is dead fixedly.

As a still further scheme of the utility model: the gasket is installed at the lower end of the locking nut and used for improving the locking effect of the locking nut, the lower end of the packing gland is integrally provided with a compression ring, the lower end face of the compression ring is attached to the upper packing seal, and the compression ring is used for compressing the upper packing seal.

As a still further scheme of the utility model: the valve body upper end is processed on the plane and is equipped with the valve body fixed orifices, the valve body fixed orifices is the screw thread blind hole, double threaded screw's lower extreme is installed in the valve body fixed orifices, through screw thread fixed connection, double threaded screw will gland with the position lock of valve body is dead fixedly.

As a still further scheme of the utility model: the outside of valve body is provided with the intake pipe, the intake pipe with the micro cylinder is connected, the intake pipe is used for the micro cylinder provides the air supply, it is downward that the sealed cross-section of going up the filler is V type opening, it is upward that the sealed cross-section of lower filler is V type opening, closely laminate with both sides wall after the V type structure rises to open, seals.

After the technical scheme is adopted, compared with the prior art, the utility model has the following beneficial effects.

The sealing filler structure is provided with an upper filler seal and a lower filler seal which are of V-shaped structures, a micro cylinder is arranged between the upper filler seal and the lower filler seal, air pressure is formed after the micro cylinder is inflated, the upper filler seal and the lower filler seal are respectively expanded to seal a valve, and the deformation of the V-shaped structures can effectively compensate abrasion loss and ensure the sealing performance after long-term use.

The air source pressure of the micro cylinder used in the sealing packing structure can be adjusted according to needs, the packing gland is fixedly connected with the valve body through the double-threaded screw, and the double threads are connected, so that the assembly clearance can be effectively reduced, and the connection stability is improved.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model to its proper form. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the present invention at A;

FIG. 3 is a schematic view of the installation of the packing gland of the present invention.

In the figure: 1-filling and sealing; 2-a miniature cylinder; 3-sealing the lower packing; 4-wedge pin; 5-a valve body; 6-a disc plate; 7-a valve stem; 8-double-ended screw; 9-locking the nut; 10-a gasket; 11-a packing gland; 12-an air inlet pipe; 13-sealing the cavity; 14-a sealing ring; 15-gland fixing holes; 16-valve body fixing hole; 17-a compression ring.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate it by a person skilled in the art with reference to specific embodiments.

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 will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and the following embodiments are used for illustrating the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1 to 3, an inflatable three-linkage combined sealing packing structure comprises a valve body 5 and a valve rod 7, wherein the valve rod 7 is installed at the central position of the valve body 5, a sealing cavity 13 is formed at the matching position of the valve body 5 and the valve rod 7, a sealing ring 14 is installed at the bottom of the sealing cavity 13, a lower packing seal 3 is installed above the sealing ring 14, a micro cylinder 2 is installed above the lower packing seal 3, an upper packing seal 1 is installed above the micro cylinder 2, a packing gland 11 is fixedly installed at the upper end of the valve body 5 through a double-headed screw 8, and the micro cylinder 2 forms air pressure after being inflated to expand the upper packing seal 3 and the lower packing seal 3 respectively to seal the valve.

The wedge pin 4 is arranged on the outer diameter of the valve rod 7 in the valve body 5, the disc plate 6 is arranged in the center of the interior of the valve body 5, and a hook groove is formed in one side, located in the valve body 5, of the sealing cavity 13 and used for enhancing the overall sealing performance; a gland fixing hole 15 is formed in the packing gland 11, the gland fixing hole 15 is a through hole, the upper end of the double-headed screw 8 penetrates through the gland fixing hole 15, a locking nut 9 is mounted at the upper end of the double-headed screw 8, and the double-headed screw 8 and the packing gland 11 can be locked and fixed by the locking nut 9; a gasket 10 is mounted at the lower end of the locking nut 9, the gasket 10 is used for improving the locking effect of the locking nut 9, a compression ring 17 is integrally arranged at the lower end of the packing gland 11, the lower end face of the compression ring 17 is attached to the upper packing seal 1, and the compression ring 17 is used for compressing the upper packing seal 1; a valve body fixing hole 16 is formed in the upper end plane of the valve body 5, the valve body fixing hole 16 is a threaded blind hole, the lower end of the double-threaded screw 8 is installed in the valve body fixing hole 16 and fixedly connected with the valve body fixing hole through threads, and the double-threaded screw 8 locks and fixes the position of the packing gland 11 and the position of the valve body 5; the outside of valve body 5 is provided with intake pipe 12, and intake pipe 12 is connected with miniature cylinder 2, and intake pipe 12 is used for providing the air supply for miniature cylinder 2, and the cross-section of going up packing 1 is that the V type opening is downward, and the cross-section of lower packing 3 is that the V type opening is upward, and the V type structure rises to open the back and closely laminates with the both sides wall, seals.

The working principle of the utility model is as follows: during installation, a sealing ring 14 is placed at the bottom of a sealing cavity 13, then a lower packing seal 3, a micro cylinder 2 and an upper packing seal 1 are sequentially installed, a compression ring 17 of a packing gland 11 is pressed on the upper packing seal 1, the lower end of a double-end screw 8 is installed in a valve body fixing hole 16, the upper end of a double-end bolt penetrates through a gland fixing hole 15, a gasket 10 and a locking nut 9 are installed for locking and fixing, an air inlet pipe 12 is connected with an external air source to supply air to the micro cylinder 2, the pressure of the air source is adjusted at any time according to the required specific pressure of a valve and the torque requirement of a valve switch, the inner diameters of the upper packing seal 1 and the lower packing seal 3 are in interference with a valve rod 7, air pressure is formed after the air is supplied to the micro cylinder 2 due to the fact that a V-shaped opening of the upper packing seal 1 faces downwards, a V-shaped opening of the lower packing seal 3 faces upwards, air pressure is formed after the air is supplied to the micro cylinder 2, and the upper packing seal 1 and the lower packing seal 1 are respectively installed, The lower packing seal 3 expands to enable the outer diameters of the upper packing seal 1 and the lower packing seal 3 to generate interference with the groove of the valve body 5, so that three seals formed by the upper packing seal 1, the lower packing seal 3 and the micro cylinder 2 are achieved, and the valve is prevented from leaking.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The utility model provides a three interlock composite seal packing structures of inflatable, includes valve body (5) and valve rod (7), its characterized in that, install valve rod (7) the central point of valve body (5) puts, valve body (5) with the cooperation position of valve rod (7) is formed with sealed chamber (13), sealing washer (14) are installed to the bottom of sealed chamber (13), packing (3) are installed down to the top of sealing washer (14), miniature cylinder (2) are installed to the top of packing (3) down, packing (1) are installed to the top of miniature cylinder (2), there is gland (11) upper end through double-end screw (8) fixed mounting of valve body (5).

2. The inflatable three-linkage combined sealing packing structure as claimed in claim 1, wherein a wedge pin (4) is installed on the outer diameter of the valve rod (7) located in the valve body (5), a disc plate (6) is installed at the center position in the valve body (5), and a hook groove is formed in one side of the sealing cavity (13) located in the valve body (5).

3. The inflatable three-linkage combined sealing packing structure according to claim 2, wherein a gland fixing hole (15) is processed on the packing gland (11), the gland fixing hole (15) is a through hole, the upper end of the double-threaded screw (8) passes through the gland fixing hole (15), and a locking nut (9) is installed at the upper end of the double-threaded screw (8).

4. The inflatable three-linkage combined sealing packing structure according to claim 3, wherein a gasket (10) is mounted at the lower end of the locking nut (9), a compression ring (17) is integrally arranged at the lower end of the packing gland (11), and the lower end surface of the compression ring (17) is attached to the upper packing seal (1).

5. The inflatable three-linkage combined sealing packing structure according to claim 4, wherein a valve body fixing hole (16) is formed in the upper end plane of the valve body (5), the valve body fixing hole (16) is a threaded blind hole, and the lower end of the double-threaded screw (8) is installed in the valve body fixing hole (16) and fixedly connected through threads.

6. The inflatable three-linkage combined sealing packing structure according to claim 5, wherein an air inlet pipe (12) is arranged on the outer side of the valve body (5), the air inlet pipe (12) is connected with the micro cylinder (2), the section of the upper packing seal (1) is downward in a V-shaped opening, and the section of the lower packing seal (3) is upward in a V-shaped opening.