High-sealing valve seat structure

Abstract

The utility model discloses a high-sealing valve seat structure which comprises a valve body, a valve seat and a valve element, the valve seat and the valve element are matched to work, and the valve seat and the valve element are installed in the valve body. The valve seat is of a cylindrical structure, an inclined step face is arranged on the inner ring of the end, facing the valve element, of the valve seat, the step face is sleeved with an annular sealing piece, the sealing piece comprises a first sealing face, an annular sealing block and a second sealing face, the first sealing face extends to the upper end face of the valve seat, and the second sealing face wraps the inclined step face. The middle sealing block protrudes out of the sealing piece; a connecting end extending into the valve seat is arranged below the valve element, a first sealing groove matched with the sealing block is formed in the side wall of the connecting end, the first sealing groove is connected with the lower end face through an inclined face, and the inclined face is tightly attached to the second sealing face. The detachable valve seat structure is arranged in the valve body, and the V-shaped sealing block is arranged on the valve seat and can be inserted into the first sealing groove of the valve element, so that the valve element is not prone to loosening, and leakage of the valve is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve seat technical field, especially a high sealing valve seat structure. BACKGROUND

[0002] The valve seat is a detachable face part in the valve, used for supporting the full closing position of the valve core and constituting a sealing pair, and the valve seat is installed on the base of the valve body and cooperates with the valve core to constitute a sealing pair.

[0003] The check valve is a valve with a circular valve clack, which is driven by its own weight and medium pressure to block the backflow of medium. It belongs to the automatic valve category, and is also called a non-return valve, a one-way valve, a backflow valve or an isolation valve. The valve clack has a lifting type and a swing type. The sealing property between the valve seat and the valve clack is poor after the valve seat is worn for a long time, which causes leakage of the valve. SUMMARY

[0004] To solve the above problems, the utility model provides a high sealing valve seat structure, which can effectively improve the sealing property of the valve seat and prolong the service life of the valve seat.

[0005] Therefore, the technical scheme of the utility model is as follows: a high sealing valve seat structure, comprising a valve body and a valve seat and a valve core cooperating with each other, wherein the valve seat and the valve core are installed in the valve body; the valve seat is a cylindrical structure, an inner ring of one end of the valve seat facing the valve core is provided with an inclined step surface, an annular sealing element is sleeved on the step surface, the sealing element comprises a first sealing surface, an annular sealing block and a second sealing surface, the first sealing surface extends to an upper end surface of the valve seat, the second sealing surface is wrapped on the inclined step surface, and the middle sealing block protrudes from the sealing element; a connecting end extending into the valve seat is arranged below the valve core, a first sealing groove matched with the sealing block is arranged on the side wall of the connecting end, the first sealing groove is connected with the lower end surface through an inclined surface, and the inclined surface is tightly combined with the second sealing surface.

[0006] On the basis of the above scheme and as a preferred scheme of the above scheme, a plurality of installation grooves are arranged on the side wall of the step surface, an installation protrusion is arranged on the outer side of the sealing element, the installation protrusion is inserted into the installation groove, and the installation protrusion is opposite to the annular sealing block in position.

[0007] On the basis of the above scheme and as a preferred scheme of the above scheme, an elastic element is arranged in the installation groove, a plurality of elongated grooves are arranged on the annular sealing block, the annular sealing block is divided into a plurality of sealing segments, and the rear end of each sealing segment is connected with the elastic element.

[0008] On the basis of the above scheme and as a preferred scheme of the above scheme, the elastic element is a plurality of springs, and the two ends of each spring are fixed on the installation groove and the sealing element.

[0009] On the basis of the above scheme and as a preferred scheme of the above scheme: the sealing block is a V-shaped convex block, and the first sealing groove below the valve core is a V-shaped groove.

[0010] Compared with the prior art, the utility model has the advantages of:

[0011] 1、In the valve body set detachable valve seat structure, the valve seat is equipped with sealing element, sealing element is equipped with the convex V-shaped sealing block, when the valve core inserts, V-shaped sealing block can insert V-shaped first sealing groove, and the valve core is not easy to loosen, avoid valve leakage.

[0012] 2、In V-shaped sealing block rear is equipped with elastic part, and the elastic part gives the sealing block to the force outward, so that the sealing block can be closely matched with the first sealing groove of the valve core, after the long time use of the sealing block wear, the elastic force of the elastic part can make up the wear amount, guarantee the sealing property of the valve seat, improve the service life of the valve. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structure schematic drawing of the valve open state of example 1;

[0014] Figure 2 It is the structure schematic drawing of the valve open state of example 1; Figure 1

[0015] Figure 3 It is the structure schematic drawing of the valve closed state of example 1;

[0016] Figure 4 It is the structure schematic drawing of the valve closed state of example 1; Figure 3

[0017] It is the structure schematic drawing of the valve seat of example 1; Figure 5

[0018] It is the structure schematic drawing of the valve seat of example 1; Figure 6

[0019] It is the structure schematic drawing of the valve open state of example 2; Figure 7 Figure 6 It is the structure schematic drawing of the valve open state of example 2;

[0020] Figure 8 It is the structure schematic drawing of the valve closed state of example 2;

[0021] Figure 9 Figure 8 It is the structure schematic drawing of the valve closed state of example 2;

[0022] Figure 10 It is the structure schematic drawing of the valve seat of example 2.

[0023] ​​​The figure is marked as: valve body 1, valve seat 2, step surface 21, mounting groove 22, valve core 3, connecting end 31, first sealing groove 32, inclined surface 33, sealing element 4, first sealing surface 41, sealing block 42, second sealing surface 43, mounting protrusion 44, elongated slot 45, sealing section 46, elastic element 5. DETAILED DESCRIPTION

[0024] In the description of the utility model, it needs to be explained that for the orientation words, such as the term“center”,“transverse (X) ”,“longitudinal (Y) ”,“vertical (Z) ”,“length”,“width”,“thickness”,“upper”,“lower”,“front”,“rear”,“left”,“right”,“vertical”,“horizontal”,“top”,“bottom”,“inner”,“outer”,“clockwise”,“counterclockwise” and the like indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of narrating the utility model and simplifying the description, and cannot be understood as indicating or implying that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the utility model.

[0025] In addition, the terms“first” and“second” are only used for description purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. Therefore, the“first” and“second” features can be explicitly or implicitly included one or more features, and in the description of the utility model, the meaning of“several” and“several” is two or more than two, unless otherwise explicitly specified.

[0026] Example 1

[0027] The high-sealing valve seat structure described in this embodiment includes a valve body 1 and a valve seat 2 and a valve core 3 cooperating, the valve seat 2 and the valve core 3 are installed in the valve body 1, the valve body 1 is provided with a through hole in the middle, the valve seat 2 is installed in the through hole, and the two can be threadedly connected or fixedly connected by inserting blocks.

[0028] The valve seat 2 is a cylindrical structure, the inner ring of the valve seat 2 towards one end of the valve core is provided with an inclined step surface 21, the step surface 21 is sleeved with an annular sealing element 4, the sealing element 4 includes a first sealing surface 41, a sealing block 42 and a second sealing surface 43, the first sealing surface 41 extends to the upper end surface of the valve seat 2, the second sealing surface 43 is wrapped on the inclined step surface 21, and the middle sealing block 42 protrudes from the sealing element 4; A plurality of mounting grooves 22 are arranged on the side wall of the step surface 21, mounting protrusions 44 are arranged on the outer side of the sealing element 4, the mounting protrusions 44 are inserted into the mounting grooves 22, and the mounting protrusions 44 are opposite to the sealing block 42 in position, for increasing the thickness of the sealing block, and firmly fixing the sealing element 4 on the valve seat.

[0029] The connecting end 31 is provided below the valve core 3 and extends into the valve seat, and the side wall 31 of the connecting end is provided with a first sealing groove 32 matched with a sealing block 42, the sealing block 42 is a V-shaped protrusion, the first sealing groove 32 below the valve core 3 is a V-shaped groove, and the two can be tightly matched. The first sealing groove 32 is connected with the lower end face through a slope 33, the slope 33 is tightly attached to a second sealing surface 43, and the sealing property between the valve seat 2 and the valve core 3 is further improved.

[0030] Embodiment 2

[0031] The embodiment has the same structure as that of the embodiment 1, and the difference lies in that the mounting groove 22 is internally provided with an elastic member 5, the sealing block 42 is provided with a plurality of elongated grooves 45, the sealing block is divided into a plurality of sealing segments 46, and the rear end of the sealing segment 46 is connected with the elastic member 5. The elastic member 5 is a plurality of springs, and the two ends of the spring are fixed on the mounting groove and the sealing member.

[0032] The elastic member 5 is arranged behind the V-shaped sealing block 42, the elastic member 5 gives the sealing block 42 an outward force, so that the sealing block 42 can be tightly matched with the first sealing groove 32 of the valve core 3, after the sealing block 42 is used for a long time and is abraded, the elastic force of the elastic member 5 can compensate the abrasion amount, the sealing property of the valve seat 2 is ensured, and the service life of the valve is improved.

[0033] The above only describes the preferred embodiments of the present application, and the protection scope of the present application is not limited to the above-mentioned embodiments. Any technical solution falling within the idea of the present application belongs to the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principle of the present application are also considered as the protection scope of the present application.

Claims

1. A high sealing seat structure comprising a valve body and a cooperating valve seat and valve core, the valve seat and valve core being mounted in the valve body; characterized in that: The valve seat is a cylindrical structure, and an inclined step surface is arranged on the inner ring of the end of the valve seat towards the valve core, an annular sealing element is sleeved on the step surface, the sealing element comprises a first sealing surface, an annular sealing block and a second sealing surface, the first sealing surface extends to the upper end surface of the valve seat, the second sealing surface is wrapped on the inclined step surface, and the middle sealing block protrudes from the sealing element; a connecting end extending into the valve seat is arranged below the valve core, a first sealing groove matched with the sealing block is arranged on the side wall of the connecting end, the first sealing groove is connected with the lower end surface through an inclined surface, and the inclined surface is closely combined with the second sealing surface.

2. A high seal seat structure as claimed in claim 1, wherein: A plurality of installation grooves are arranged on the side wall of the step surface, installation protrusions are arranged on the outer side of the sealing element, the installation protrusions are inserted into the installation grooves, and the installation protrusions are opposite to the annular sealing block in position.

3. A high seal seat structure as claimed in claim 2, wherein: Elastic elements are arranged in the installation grooves, a plurality of slender grooves are arranged on the annular sealing block, the annular sealing block is divided into a plurality of sealing segments, and the rear ends of the sealing segments are connected with the elastic elements.

4. A high seal seat structure as claimed in claim 3, wherein: The elastic elements are a plurality of springs, and the two ends of the springs are fixed on the installation grooves and the sealing element.

5. A high seal seat structure as claimed in claim 1, wherein: The sealing block is a V-shaped protrusion, and the first sealing groove below the valve core is a V-shaped groove.

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