CN213685366U

CN213685366U - Ball valve dynamic sealing mechanism using V-shaped rubber spring

Info

Publication number: CN213685366U
Application number: CN202120267332.1U
Authority: CN
Inventors: 王立峰; 王秀强; 吴龙龙; 王孟晓
Original assignee: Boding Automotive Technology Shandong Co Ltd
Current assignee: Boding Power Shandong Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-07-13
Anticipated expiration: 2031-02-01

Abstract

The application discloses use ball valve dynamic seal mechanism of V-arrangement rubber spring, including PTFE seal cover, plastic pad and rubber circle, rubber circle one end top is tight on the terminal surface of inlet tube, and the other end top is tight in plastic pad one end, the plastic pad other end and PTFE seal cover chucking. Has the following advantages: the occupied axial space is small, the minimum axial space is only 1/5 of a spring dynamic sealing mechanism, a V-shaped rubber ring is used, the elastic force of the rubber ring is controllable, sealing can be guaranteed, and a proper ball valve sealing force can be provided.

Description

Ball valve dynamic sealing mechanism using V-shaped rubber spring

Technical Field

The utility model relates to an use V-arrangement rubber spring's ball valve dynamic seal mechanism relates to engine parts technical field.

Background

The structure of a common thermal management ball valve is shown in fig. 1, and the principle is as follows: spring force is applyed for the PTFE seal cover to the spring, the PTFE seal cover is compressed tightly on the ball valve, form the movive seal of ball valve, in ball valve processing and the assembling process, for the PTFE cover have the concentricity (the axiality tolerance of ball valve itself, the axiality tolerance of ball valve pilot hole), this concentricity can not be eliminated, in order to guarantee that the ball valve normally rotates, it is flexible around needing the PTFE seal cover ability, dodge the convex high point of ball valve (the concentricity leads to the extra protrusion of ball valve normal position).

Can design a sliding block in order to solve above-mentioned problem, give the PTFE seal cover with the power transmission of spring, sliding block and sliding sleeve can slide each other, give the PTFE seal cover with the power transmission of spring.

The problem of design like this is in order to guarantee the less radial force of sliding sleeve and sliding block, adopts little clearance fit, and the sealing washer compressibility is also less, if there is little slag, extremely easily blocks, and the second problem is that the axial dimension of spring and sliding block is bigger, and the overall dimension of thermal management ball valve often will be done very greatly, when arranging on the engine, usually not allow thermal management valve to occupy too big space.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to above not enough, provide an use V-arrangement rubber spring's ball valve dynamic seal mechanism, the axial space that occupies is little, and minimum axial space only has spring dynamic seal mechanism's 1/5, uses V-arrangement rubber circle, and the elastic force of rubber circle is controllable, both can guarantee sealedly, can provide a suitable ball valve sealing power again.

For solving the technical problem, the utility model discloses a following technical scheme:

the utility model provides an use ball valve dynamic seal mechanism of V-arrangement rubber spring, includes PTFE seal cover, plastic gasket and rubber circle, and rubber circle one end top is tight on the terminal surface of inlet tube, and the other end top is tight in plastic gasket one end, and the plastic gasket other end and the chucking of PTFE seal cover.

Further, the plastic gasket functions to transfer the force of the rubber ring to the PTFE seal cartridge and provides securement and positioning for the rubber ring and the PTFE seal cartridge.

Furthermore, the rubber ring has deformation compression elasticity, and the minimum axial dimension of the rubber ring can be 1/5 of the spring, so that a large axial sealing force can be generated.

Furthermore, a sealing pair for water is formed between the PTFE sealing sleeve and the ball valve, and the PTFE sealing sleeve is of a step structure with a narrow upper part and a wide lower part.

Furthermore, both ends of the plastic gasket are respectively provided with a step structure, and the upper end of the PTFE seal sleeve is tightly clamped in the plastic gasket.

Furthermore, the outer circle and the end face of the plastic gasket are tightly clamped in the inner step of the water inlet pipe

Further, the rubber ring is of a V-shaped structure.

Furthermore, the rubber ring comprises an inner sealing lip and an outer sealing lip which are integrally formed.

Furthermore, a plurality of notches are arranged on the outer sealing lip.

The utility model adopts the above technical scheme, compare with prior art, have following technological effect:

the occupied axial space is small, the occupied axial space of the V-shaped rubber ring is small, the minimum axial space is only 1/5 of the spring dynamic sealing mechanism, the V-shaped rubber ring is used, the elastic force of the rubber ring is controllable, sealing can be guaranteed, and a proper ball valve sealing force can be provided.

The V-shaped rubber ring has a sealing function while providing spring force, and after being matched with the plastic pad and the PTFE sealing sleeve, the leakage rate of the whole mechanism is ensured to be within an allowable range.

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 embodiments or the technical solutions in the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of the dynamic sealing mechanism of the ball valve of the present invention.

Detailed Description

Embodiment 1, as shown in fig. 1, a ball valve dynamic seal mechanism using a V-shaped rubber spring includes a PTFE seal sleeve 1, a plastic gasket 2, and a rubber ring 3, one end of the rubber ring 3 abuts against an end surface of a water inlet pipe, the other end abuts against the plastic gasket 2, and the other end of the plastic gasket 2 is tightly clamped with the PTFE seal sleeve 1.

The rubber ring 3 has deformation compression elasticity, the axial dimension of the rubber ring 3 can be 1/5 of the spring instead of the spring, and the rubber ring 3 can generate large axial sealing force by compressing a small dimension, such as 0.5 mm.

A sealing pair for water is formed between the PTFE sealing sleeve 1 and the ball valve, and the PTFE sealing sleeve 1 is of a step structure with a narrow upper part and a wide lower part.

The two ends of the plastic gasket 2 are both designed into step structures, the upper end step of the PTFE seal sleeve 1 is tightly clamped with the lower end step of the plastic gasket 2, the upper end of the PTFE seal sleeve 1 is tightly clamped in the plastic gasket 2, so that the PTFE seal sleeve 1 can only rotate in the inner hole of the plastic gasket 2 and cannot have other moving spaces, and the excircle and the end face of the plastic gasket 2 are tightly clamped in the inner step of the water inlet pipe.

The plastic gasket 2 has the function of transferring the force of the rubber ring 3 to the PTFE sealing sleeve 1, and provides fixing and positioning for the rubber ring 3 and the PTFE sealing sleeve 1.

One end of the rubber ring 3 is tightly pressed on the end face of the water inlet pipe, the other end of the rubber ring is tightly pressed on one end of the plastic gasket 2, when the water inlet pipe is tightly pressed on the valve body, a pressing force is provided for the whole structure, finally, the rubber ring 3 is deformed, and a force for pressing the plastic valve core by the PTFE sealing sleeve is provided, so that the valve core is sealed.

Rubber circle 3 is the V-arrangement structure, and the rubber circle of V-arrangement structure can be under the great condition of compression deflection, and the deformation power that provides can not be too big, and if the deformation power of V-arrangement circle is too big, can lead to the ball valve to rotate the frictional force of in-process too big, and frictional torque is too big, causes the ball valve jamming.

Rubber circle 3 includes interior seal lip 31 and external seal lip 32, interior seal lip 31 and external seal lip 32 integrated into one piece, be equipped with a plurality of breachs 33 on the external seal lip 32, just form the vacuum between the terminal surface of interior seal lip 31 and external seal lip 32 and inlet tube like this, water can enter into in the confined space from the breach position, 3 structures of rubber circle have been guaranteed can not become invalid, it is too big to prevent to appear rubber circle 3 if the packing force that receives, two seal lips of 3 lower extremes of rubber circle can be in the same place with the terminal surface pressfitting of inlet tube, form the vacuum between 3 two seal lips of rubber circle and the lower inlet tube, rubber circle 3 will be pressed on the terminal surface of inlet tube, can not return, lead to rubber circle 3 can not provide the problem of the power that compresses tightly the ball valve for the PTFE sealing washer.

The description of the present invention has been presented for purposes of illustration and description, and is not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to practitioners skilled in this art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides an use ball valve motive seal mechanism of V-arrangement rubber spring which characterized in that: the water inlet pipe sealing device comprises a PTFE sealing sleeve (1), a plastic gasket (2) and a rubber ring (3), wherein one end of the rubber ring (3) is tightly pressed on the end surface of a water inlet pipe, the other end of the rubber ring is tightly pressed on one end of the plastic gasket (2), the other end of the plastic gasket (2) is tightly clamped with the PTFE sealing sleeve (1), and the plastic gasket (2) is used for transferring the force of the rubber ring (3) to the PTFE sealing sleeve (1) and fixing and positioning the rubber ring (3) and the PTFE sealing sleeve (1);

a sealing pair for water is formed between the PTFE sealing sleeve (1) and the ball valve;

the rubber ring (3) is of a V-shaped structure;

the PTFE seal sleeve (1) is of a step structure with a narrow upper part and a wide lower part.

2. A ball valve dynamic seal mechanism using a V-shaped rubber spring as claimed in claim 1, wherein: the two ends of the plastic gasket (2) are both designed to be of stepped structures, and the upper end of the PTFE sealing sleeve (1) is clamped in the plastic gasket (2).

3. A ball valve dynamic seal mechanism using a V-shaped rubber spring as claimed in claim 1, wherein: the excircle and the terminal surface chucking of plastic shim (2) are in the interior step of inlet tube.

4. A ball valve dynamic seal mechanism using a V-shaped rubber spring as claimed in claim 1, wherein: the rubber ring (3) comprises an inner sealing lip (31) and an outer sealing lip (32), and the inner sealing lip (31) and the outer sealing lip (32) are integrally formed.

5. A ball valve dynamic seal mechanism using a V-shaped rubber spring as claimed in claim 4, wherein: the outer sealing lip (32) is provided with a plurality of notches (33).