CN214617900U

CN214617900U - Sealing structure applied to self-adaptive sealing

Info

Publication number: CN214617900U
Application number: CN202120849307.4U
Authority: CN
Inventors: 何锐; 王学攀; 王东福; 洪炳达; 吴勤勤
Original assignee: Bensv Valve Stock Co ltd
Current assignee: Bensv Valve Stock Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-05
Anticipated expiration: 2031-04-23

Abstract

The utility model provides a be applied to sealed seal structure of self-adaptation, the lateral wall to the valve body is cup jointed respectively to the both ends periphery of valve shaft, and cup joint to the valve shaft periphery in the middle part of the valve plate, and the valve plate is located inside the valve body, and the inside ring platform that sets up of valve body, ring platform and valve plate are located with the axle center, and the both sides inner wall fixed connection of sealing strip body is to the both ends of ring platform, and first round position is between sealing strip body and the valve plate, and the peripheral contact of valve plate is connected to the inner circle of first circle body. Be applied to sealed structure of self-adaptation, when the pipeline of low pressure difference was used, the valve closure target in place the back, the diaphragm type is sealed to be connected with valve plate outer fringe contact, realizes that the low pressure is sealed, the setting of gas duct groove and the first round body can avoid producing the water hammer phenomenon and causing the damage to valve body internals when closing the butterfly valve, also prevent to produce rigid wearing and tearing to the first round body when valve plate and the contact of the first round body simultaneously.

Description

Sealing structure applied to self-adaptive sealing

Technical Field

The utility model belongs to the valve seal field especially relates to a be applied to sealed structure of self-adaptation.

Background

The valve sealing surface refers to a part of a valve seat and a closing part which are contacted with each other to form a seal, an inner part of the valve is generally referred to as a flashboard (or a valve clack, a sphere, a butterfly plate and the like), the valve seat and a valve rod, but other parts such as a lining, an upper sealing seat and the like are included in some cases, and the material of the inner part is selected according to the following principle: firstly, according to the comprehensive consideration of main materials, medium characteristics, structural characteristics, stress of parts and the like, the corrosion resistance of internal parts materials is higher than or equal to that of the main materials, the valve in the prior art is good in sealing at the initial use stage, but after a period of time, the sealing is easy to damage, and the valve is difficult to maintain after damage, and the main reason is that the conventional valve generally adopts forced sealing, and the sealing surface is extruded by external force to realize sealing, so that the sealing surface is greatly damaged; the sealing surface has high precision and is easily influenced by medium sundries to form local damage; the soft sealing rubber is extruded by external force for a long time, the elasticity of the rubber is weakened or even disappears, and the sealing performance is lost.

Disclosure of Invention

In view of this, the utility model aims at providing be applied to the sealed seal structure of self-adaptation to solve the valve internal seal and use wearing and tearing or the rigid fish tail for a long time and cause the problem that device life reduces.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

the utility model provides a be applied to sealed seal structure of self-adaptation, which comprises a valve body, valve plate and valve shaft, the lateral wall to the valve body is cup jointed respectively to the both ends periphery of valve shaft, and the valve plate middle part cup joints to the valve shaft periphery, the valve plate is located inside the valve body, the inside loop platform that sets up of valve body, the loop platform is located the same axle center with the valve plate, the both ends fixed connection to the loop platform both ends of diaphragm type sealing strip, and the diaphragm type sealing strip includes the sealing strip body and the first round body of a body structure, the cross section of sealing strip body is U type structure, the both ends of the both sides inner wall fixed connection to the loop platform of sealing strip body, first round body is located between sealing strip body and the valve plate, and the peripheral contact of valve plate is connected to the inner circle of first round body.

Further, the sealing strip body comprises an inner liner of an integral structure and rubber wrapped on the periphery of the inner liner.

Furthermore, the lining is made of nylon cloth, and the first ring body is made of rubber.

Furthermore, the sealing strip body is hermetically connected with two ends of the ring platform, an air cavity is arranged between the sealing strip body and the ring platform, and one end of the power source penetrates through the side wall of the valve body and the ring platform and then is communicated to the air cavity.

Further, an air channel groove is formed in the inner ring of the ring platform, and an air cavity is formed between the air channel groove and the bottom of the U-shaped structure of the sealing strip body.

Furthermore, the air channel groove is an arc-shaped annular groove, the cross street surface of the first ring body is of an arc-shaped structure, and the arc-shaped groove and the first ring body are coaxially arranged.

Compared with the prior art, be applied to sealed structure of self-adaptation have following beneficial effect:

(1) be applied to sealed structure of self-adaptation, when the pipeline of low pressure difference was used, the valve closure target in place the back, the diaphragm type is sealed to be connected with valve plate outer fringe contact, realizes that the low pressure is sealed, the setting of gas duct groove and the first round body can avoid producing the water hammer phenomenon and causing the damage to valve body internals when closing the butterfly valve, also prevent to produce rigid wearing and tearing to the first round body when valve plate and the contact of the first round body simultaneously.

(2) Be applied to sealed structure of self-adaptation, the sealing strip body includes the rubber of inside lining and peripheral parcel, the inside lining is the sealing strip of reinforcing nylon cloth, has reinforceed the intensity of sealed material, has initiative solution to the wearing and tearing of sealed material, for the ease of being connected with valve plate outer fringe contact of the inner circle of sealing strip body realizes low pressure seal promptly, sets up first circle body at the inner circle of sealing strip body, first circle body is the rubber material.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic cross-sectional view of a butterfly valve with a sealing structure applied to adaptive sealing according to an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

fig. 3 is a schematic cross-sectional view of a three-way reversing valve according to an embodiment of the present invention.

Description of reference numerals:

1-a valve body; 11-ring table; 2-a valve plate; 3-a valve shaft; 4-sealing strip body; 41-first ring body; 5-a power source; 51-a valve body; 52-fifth line; 53-sixth line; 54-a seventh conduit; 55-valve core; 56-blocking plate; 6-first direction valve.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed 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 meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

The sealing structure applied to the self-adaptive sealing can be applied to a ball valve, a semi-ball valve, a butterfly valve and other valve bodies with friction on sealing surfaces, as shown in figures 1-3, the butterfly valve applied to the sealing structure of the self-adaptive sealing comprises a valve body 1, a valve plate 2, a valve shaft 3 and a compensation type seal, the peripheries of two ends of the valve shaft 3 are respectively sleeved on the side wall of the valve body 1, the middle part of the valve plate 2 is sleeved on the periphery of the valve shaft 3, the valve plate 2 is positioned in the valve body 1, the compensation type seal is arranged in the valve body 1, the inner ring of the compensation type seal is in contact connection with the outer edge of the valve plate 2, the compensation type seal comprises a diaphragm type seal and a power source 5, two ends of the diaphragm type seal are respectively and fixedly arranged in the valve body 1, an air cavity is arranged between the periphery of the diaphragm type seal and the valve body 1, the inner ring of the diaphragm type seal is in contact connection with the outer edge of the valve plate 2, one end of the power source 5 passes through the side wall of the valve body 1 and then is communicated with the air cavity, the closing process of the butterfly valve can be manually completed, or can be automatically completed through an actuator in the prior art, for example, the closing process can be manually completed, a worker firstly screws the valve shaft 3 to rotate, the valve shaft 3 drives the valve plate 2 to rotate, the closing of the valve is realized, after the valve is closed in place, the diaphragm type seal is in contact connection with the outer edge of the valve plate 2, the low-pressure seal is realized, the power source 5 provides medium pressure, after the medium pressure flows to the air cavity, the medium pressure in the air cavity is conducted to the diaphragm type seal, the tight fit between the diaphragm type seal and the valve plate 2 is realized, the high-pressure seal is realized, the opening and closing characteristics of the traditional switch valve are changed, the opening and closing of the valve are divided into two actions, the valve is safer in operation, the diaphragm type seal does not need to be extruded and deformed when the valve plate 2 is closed, the operation torque of the valve is reduced, and meanwhile, the damage of the sealing surface caused by extra sealing torque during the operation of the valve is avoided, when the use executor is used for automatic opening and closing, the selection specification of the executor is reduced, the accessory cost is reduced, the diaphragm type seal cannot excessively deform for a long time, the service life of a sealing surface is greatly prolonged, the overall service life of the valve is prolonged, and the later maintenance cost is reduced.

In order to facilitate the diaphragm type seal to be fixedly connected to the inside of the valve body 1, a ring platform 11 is arranged inside the valve body 1, the periphery of the ring platform 11 is fixedly connected to the side wall of the valve body 1, the periphery of the valve plate 2 is located at the inner ring of the ring platform 11, two ends of the diaphragm type seal are respectively connected to two ends of the ring platform 11 through gaskets and bolts in a sealing mode, an air cavity is located between the diaphragm type seal and the ring platform 11, an air channel groove is formed in the inner ring of the ring platform 11, the air channel groove and the periphery of the diaphragm type seal form an air cavity, and medium pressure provided by the power source 5 is filled into the air cavity.

Diaphragm type sealing strip includes the sealing strip body and the first ring body of a body structure, and the cross section of sealing strip body is U type structure, the both sides inner wall fixed connection of sealing strip body to the both ends of ring platform, and first ring position is between sealing strip body and valve plate, and the peripheral contact of valve plate is connected to the inner circle of first ring body, sealing strip body 4U type structure bottom forms the air cavity with the air flue groove, and sealing strip body 4 includes the rubber of inside lining and peripheral parcel, and the inside lining is the sealing strip of reinforcing nylon cloth, has reinforceed the intensity of sealed material, has the initiative means of solving to the wearing and tearing of sealed material, for the ease of being connected with the outer fringe contact of valve plate 2 of the inner circle of sealing strip body 4 realizes low pressure seal promptly, sets up first ring body 41 at the inner circle of sealing strip body 4, and first ring body 41 is the rubber material.

The cross section of the air channel groove is of an arc structure, the cross section of the first ring body 41 is of an arc structure, in order to prevent the internal components of the valve body 1 from being damaged by the water hammer phenomenon generated when the butterfly valve is closed, meanwhile, the hard abrasion of the first ring body 41 when the valve plate 2 is contacted with the first ring body 41 is also prevented, the first ring body 41 and the air channel groove are positioned at the same axle center, and the first ring body 41 and the air channel groove are symmetrically arranged, the air channel groove can be used as an avoiding groove when the first ring body 41 is pressed, the air channel groove is pressed into the air channel groove, when the first ring body 41 is pressed into the air channel groove by water pressure, the valve plate 2 and the first ring body 41 are provided with a gap which can be used as a buffer water hammer, when the first ring body 41 is extruded by the valve plate 2, hard scratches such as foreign matters on the valve plate 2 can be avoided, and when the pressure difference of water pressure on two sides of the valve plate 2 is low, the first ring body 41 is in contact connection with the valve plate 2 to realize low-pressure sealing.

One end of the power source 5 is communicated to the air cavity sequentially through the first pipe body, the first reversing valve 6 and the second pipe body, the first reversing valve 6 is a two-position three-way valve, the first end of the first reversing valve 6 is fixedly connected to one end of the first pipe body, the second end of the first reversing valve 6 is fixedly connected to one end of the second pipe body, the third end of the first reversing valve 6 is empty, an active sealing method is adopted, if a sealing surface is seriously damaged due to the external severe environment, a compulsory measure can be taken, the third end of the first reversing valve 6 is communicated with an external pressure source, such as a water pump, an air pump, a hand pump and the like, active compulsory sealing is implemented, and the butterfly valve is convenient to overhaul.

The power source 5 can be any one of a cylinder, an oil cylinder, a hand-operated cylinder and the like in the prior art, and can also be set as the power source 5 for performing pressure compensation on the sealing strip body 4 by utilizing the pressure in the valve body 1 on two sides of the valve plate 2, the power source 5 for performing pressure compensation on the sealing strip body 4 by utilizing the pressure in the valve body 1 on two sides of the valve plate 2 comprises a third pipeline, a second reversing valve and a fourth pipeline, the second reversing valve is a three-way reversing valve, the first end of the second reversing valve is communicated to the inside of the valve body 1 through the third pipeline, the second end of the second reversing valve is communicated to the inside of the valve body 1 through the fourth pipeline, the third end of the second reversing valve is fixedly connected to one end of the first pipe, and the water inlet ends of the third pipeline and the fourth pipeline are respectively positioned on two sides of the valve plate 2.

The three-way reversing valve can be any one of a manual valve or an automatic valve in the prior art, and can also be a three-way reversing valve for automatically changing the way through water pressure, the three-way directional valve automatically switched by water pressure comprises a valve body 51, a fifth pipeline 52, a sixth pipeline 53, a seventh pipeline 54 and a valve core 55, wherein the valve core 55 is installed inside the valve body 51, one end of the third pipeline is communicated to the inside of the valve body 51 through the fifth pipeline 52, the fourth pipeline is communicated to the inside of the valve body 51 through the sixth pipeline 53, the first pipeline is communicated to the inside of the valve body 51 through the seventh pipeline 54, the fifth pipeline 52, the valve body 51 and the sixth pipeline 53 are coaxially arranged, the seventh pipeline 54 and the valve body 51 are arranged perpendicular to each other, the valve core 55 is of a ball structure, rubber is wrapped outside the valve core 55, the upper valve core 55 can use a practice steel ball with the existing specification, and the wrapped rubber is passively pressed to realize sealing.

The fifth pipeline 52 and the sixth pipeline 53 have the same structure, the inner ring at one end of the fifth pipeline 52 and the inner ring at one end of the second pipeline are both provided with a register groove, the register groove is in a circular truncated cone structure, the outer diameter of the valve core 55 is equal to the maximum inner diameter of the register groove, the periphery of the valve core 55 is in contact connection with the register groove, and the register groove is matched with the valve core 55 to realize sealing of the corresponding pipeline.

Be equipped with first through-hole on the valve body 51, first through-hole and seventh pipeline 54 are the coaxial axle center setting, in order to prevent that case 55 from falling into seventh pipeline 54, set up in the first through-hole and block board 56, in order to prevent that block board 56 from interfering the inside displacement of case 55 at valve body 51, will block board 56 and valve body 51 and set up to a body structure, guarantee the level and smooth of valve body 51 inner wall, block and be equipped with a plurality of through-flow holes on the board 56, the inside medium of valve body 51 communicates to inside the first pipeline through the through-flow hole.

Through the working principle of the three-way reversing valve of the hydraulic automatic path switching, when the butterfly valve is closed, the water body in the valve body 1 respectively flows to the interior of the valve body 51 through the fifth pipeline 52 and the sixth pipeline 53, taking the example that the water pressure in the fifth pipeline 52 is higher than that in the sixth pipeline 53 as an example, the water body in the fifth pipeline 52 pushes the valve core 55 to move along the axial direction and block the water body flow path of the sixth pipeline 53, in the process of displacement of the valve core 55, the water body in the fifth pipeline 52 sequentially flows into the air cavity through the valve body 51, the blocking plate 56, the seventh pipeline 54 and the first pipeline, the water pressure in the air cavity is compensated to the first ring body 41, so that the inner ring of the first ring body 41 is tightly connected with the periphery of the valve plate 2, the higher the water pressure of the fifth pipeline 52 is, the closer the contact between the inner ring of the first ring body 41 and the periphery of the valve plate 2 is, the sealing of the first ring body 41 is ensured to be tight, and the sealing effect of the compensation is not hindered even if the natural wear exists in the first ring body 41, the service life of the device is prolonged, meanwhile, the three-way reversing valve solves the problem of bidirectional sealing of the valve, and sealing pressure is only high no matter the upstream or the downstream is high, so that bidirectional active sealing is realized.

The opening and closing process and the sealing principle of the sealing structure applied to self-adaptive sealing are as follows:

when the butterfly valve is in an opening state, the first end and the third end of the two-position three-way valve are communicated, the pressure in the air cavity is smaller than the internal pressure of the valve body 1, the sealing strip body 4 is tightly attached to the air channel groove under the influence of the water pressure in the valve body 1, when a worker closes the butterfly valve, the valve plate 2 is close to the area of the sealing strip body 4, when the water pressure exists in the valve body 1, the water pressure tightly presses the sealing strip body 4, the sealing strip body 4 is not in contact with the valve plate 2, when no water pressure or low water pressure exists in the valve body 1, the first ring body 41 is in contact with the valve plate 2 to form low-pressure sealing, the worker switches the passage of the two-position three-way valve, the first end and the second end of the two-position three-way valve are communicated, taking the case that the water pressure in the fifth pipeline 52 is high, the water in the fifth pipeline 52 sequentially flows into the air cavity through the valve body 51, the blocking plate 56, the seventh pipeline 54 and the first pipeline, the first ring body 41 arranged on the inner ring of the sealing strip body 4 is tightly attached to the valve plate 2, forming a high pressure compensated seal.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Be applied to sealed structure of self-adaptation, including valve body (1), valve plate (2) and valve shaft (3), the both ends periphery of valve shaft (3) is cup jointed the lateral wall of valve body (1) respectively, and valve plate (2) middle part cup joints to valve shaft (3) periphery, and valve plate (2) are located inside valve body (1), its characterized in that: inside ring platform (11) that sets up of valve body (1), ring platform (11) and valve plate (2) are located coaxial, the both ends fixed connection of diaphragm type sealing strip is to ring platform (11) both ends, and the diaphragm type sealing strip includes sealing strip body (4) and the first circle body (41) of a body structure, the cross section of sealing strip body (4) is U type structure, the both ends of both sides inner wall fixed connection of sealing strip body (4) ring platform (11), first circle body (41) are located between sealing strip body (4) and valve plate (2), and valve plate (2) peripheral contact is connected to the inner circle of first circle body (41).

2. A sealing structure applied to adaptive sealing according to claim 1, wherein: the sealing strip body (4) comprises an integral lining and rubber wrapped on the periphery of the integral lining.

3. A sealing structure applied to adaptive sealing according to claim 2, wherein: the lining is made of nylon cloth, and the first ring body (41) is made of rubber.

4. A sealing structure applied to adaptive sealing according to claim 1, wherein: the sealing strip body (4) is connected with the two ends of the ring platform (11) in a sealing mode, an air cavity is arranged between the sealing strip body (4) and the ring platform (11), and one end of the power source (5) penetrates through the side wall of the valve body (1) and the ring platform (11) and then is communicated to the air cavity.

5. A sealing arrangement for an adaptive seal according to claim 4, wherein: an air channel groove is formed in the inner ring of the ring platform (11), and an air cavity is formed between the air channel groove and the bottom of the U-shaped structure of the sealing strip body (4).

6. A sealing arrangement for an adaptive seal according to claim 5, wherein: the air channel groove is an arc-shaped ring groove, the cross section of the first ring body (41) is of an arc-shaped structure, and the arc-shaped groove and the first ring body (41) are arranged coaxially.