Butterfly valve with good sealing performance

Abstract

The utility model belongs to the technical field of butterfly valves, and particularly relates to a butterfly valve with good sealing performance, which comprises a valve body and a valve plate arranged in the valve body. Wherein a sealing rubber strip is arranged on the arc surface of the valve plate; the valve rod assembly comprises an upper valve rod and a lower valve rod which penetrate through the valve body; the upper valve rod and the lower valve rod are connected with the valve plate so as to drive the valve plate to be opened or closed through rotation. According to the butterfly valve with the good sealing performance, the sealing rubber strip is arranged on the arc face of the valve plate and abuts against the valve body when the valve plate is closed so as to seal the valve body, a gap is effectively prevented from being formed between the valve plate and the inner wall of the valve seat, and the sealing performance of a product is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of butterfly valves, and in particular relates to a butterfly valve with good sealing performance. Background Art

[0002] A butterfly valve, also known as a flap valve, is a regulating valve with a simple structure. It can be used for switching control of low-pressure pipeline media. A butterfly valve refers to a valve in which the closing member (valve disc or butterfly plate) is a disc that rotates around the valve axis to achieve opening and closing.

[0003] In the prior art, due to the simple structure of the butterfly valve, after long-term use, the butterfly plate is prone to wear, thereby affecting the sealing performance of the butterfly valve. The worn butterfly valve will still cause leakage after closing.

[0004] Therefore, in order to solve the above problems, it is necessary to design a butterfly valve with good sealing performance. Utility Model Content

[0005] The utility model aims to provide a butterfly valve with good sealing performance to solve the technical problem of poor sealing performance of the existing butterfly valves.

[0006] In order to solve the above technical problems, the utility model provides a butterfly valve with good sealing performance, comprising:

[0007] A valve body and a valve plate arranged in the valve body; wherein

[0008] A sealing strip is provided on the arc surface of the valve plate;

[0009] The valve stem assembly comprises: an upper valve stem and a lower valve stem penetrating the valve body;

[0010] The upper valve stem and the lower valve stem are respectively connected to the valve plate to drive the valve plate to open or close by rotation;

[0011] The sealing strip is suitable for abutting against the valve body when the valve plate is closed to seal the valve body.

[0012] Furthermore, the valve stem assembly further comprises: packing sleeves respectively sleeved on the upper valve stem and the lower valve stem;

[0013] The outer side of the stuffing sleeve contacts the valve body.

[0014] Furthermore, a first opening is formed at the bottom of the upper valve stem;

[0015] A second opening is formed at the top of the lower valve stem;

[0016] The upper end and the lower end of the valve plate are respectively inserted into the first opening and the second opening.

[0017] Furthermore, the valve body comprises: a male part, a female part adapted to the male part, and half rings respectively arranged on the male part and the female part; wherein

[0018] The half circles on the male part and the female part are arranged on non-colateral sides; and

[0019] The two half circles are adapted to contact the valve plate when the valve plate is closed.

[0020] Further, the male part and the female part are suitable for being connected by bolts;

[0021] The sides of the male part and the female part are both provided with a plurality of mounting through holes;

[0022] The two half circles are provided with bolt holes concentric with the mounting through holes; wherein

[0023] The two half-rings are suitable for being connected by bolts; and

[0024] The bolt is adapted to be engaged with the bolt hole after passing through the installation through hole, so that the two half circles are respectively connected with the male part and the female part.

[0025] Furthermore, the surface of the half circle is coated with gel.

[0026] Furthermore, a first limit block is provided at the bottom of the valve body;

[0027] A second limit block is provided on the top of the valve body;

[0028] The second limiting block is sleeved on the upper valve stem.

[0029] Furthermore, a gear portion is provided on the top of the upper valve stem.

[0030] The beneficial effects of the utility model are:

[0031] (I) The utility model provides a sealing rubber strip on the arc surface of the valve plate to seal the gap between the valve plate and the valve seat, and provides two half circles and coats the surface of the half circle with gel so that when the valve plate is closed, the half circle is against the gel on the half circle to form a double seal. The installation gap is also filled with gel. A packing sleeve is sleeved on the outer side of the upper valve stem and the lower valve stem to seal the gap between the upper valve stem and the lower valve stem and the valve body. Through the above design, the double seal and high-efficiency seal effect can be achieved.

[0032] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a stereogram of the preferred embodiment of the whole of the utility model;

[0036] Figure 2 It is a three-dimensional diagram of a preferred embodiment of half of the valve body of the utility model;

[0037] Figure 3 It is an exploded view of a preferred embodiment of the valve body of the utility model.

[0038] In the figure:

[0039] Valve body 1, male part 11, female part 12, half circle 13, bolt hole 131, mounting through hole 14, first limit block 15, second limit block 16;

[0040] Valve plate 2, sealing strip 21;

[0041] The valve stem assembly 3 , the upper valve stem 31 , the first opening portion 311 , the gear portion 312 , the lower valve stem 32 , the second opening portion 321 , and the stuffing box 33 . DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example 1

[0043] like Figures 1 to 3 As shown, this embodiment provides a butterfly valve with good sealing performance, including:

[0044] A valve body 1, a valve plate 2 arranged in the valve body 1; wherein a sealing strip 21 is provided on the arc surface of the valve plate 2; a valve stem assembly 3, which includes: an upper valve stem 31 and a lower valve stem 32 that penetrate the valve body 1; wherein the upper valve stem 31 and the lower valve stem 32 are respectively connected to the valve plate 2 to drive the valve plate 2 to open or close by rotation; the sealing strip 21 is suitable for abutting against the valve body 1 when the valve plate 2 is closed to seal the valve body 1; wherein the upper valve stem 31 and the lower valve stem 32 are connected to the valve plate 2 by but not limited to a movable connection.

[0045] The valve stem assembly 3 also includes: a packing sleeve 33 respectively sleeved on the upper valve stem 31 and the lower valve stem 32; wherein the outer side of the packing sleeve 33 is in contact with the valve body 1; wherein by providing the packing sleeve 33, the gap between the upper valve stem 31 and the lower valve stem 32 and the valve body 1 is sealed to prevent gas or liquid leakage.

[0046] A first opening 311 is provided at the bottom of the upper valve stem 31; a second opening 321 is provided at the top of the lower valve stem 32; wherein the upper end and the lower end of the valve plate 2 are respectively inserted into the first opening 311 and the second opening 321; wherein the first opening 311 and the second opening 321 are bonded to the valve plate 2 by, but not limited to, bonding.

[0047] The valve body 1 comprises: a male part 11, a female part 12 matched with the male part 11 and half circles 13 respectively arranged on the male part 11 and the female part 12; wherein the half circles 13 on the male part 11 and the female part 12 are not arranged on the same side; and the two half circles 13 are suitable for contacting the valve plate 2 when the valve plate 2 is closed.

[0048] The male part 11 and the female part 12 are suitable for being connected by bolts; the side surfaces of the male part 11 and the female part 12 are provided with a plurality of mounting through holes 14; the two half circles 13 are provided with bolt holes 131 which are concentric with the mounting through holes 14; wherein the two half circles 13 are suitable for being connected by bolts; and the bolts are suitable for passing through the mounting through holes 14 and then engaging with the bolt holes 131, so that the two half circles 13 are respectively connected to the male part 11 and the female part 12; by providing the mounting through holes 14 and the bolt holes 131, the effect of facilitating the connection of the two half circles 13 to the male part 11 and the female part 12 respectively by bolts is achieved.

[0049] The surface of the half circle 13 is coated with gel; by coating the gel on the surface of the half circle 13, the gap is filled to prevent gas or liquid leakage.

[0050] A first limit block 15 is provided at the bottom of the valve body 1; a second limit block 16 is provided at the top of the valve body 1; wherein the second limit block 16 is sleeved on the upper valve stem 31, and the effect of limiting the valve body 1 and the packing sleeve 33 is achieved by setting the first limit block 15 and the second limit block 16.

[0051] A gear portion 312 is provided at the top of the upper valve stem 31 . The gear portion 312 is provided to facilitate the subsequent installation of a manual drive portion or an electric drive portion.

[0052] In this embodiment, a sealing strip 21 is provided on the arc surface of the valve plate 2 to seal the gap between the valve plate 2 and the valve seat 1, and two half circles 13 are provided, and gel is coated on the surface of the half circle 13 so that when the valve plate 2 is closed, the half circle 13 is offset against the gel on the half circle 13 to form a double seal, and the installation gap is also filled with gel. A packing sleeve 33 is sleeved on the outer side of the upper valve stem 31 and the lower valve stem 32 to seal the gap between the upper valve stem 31 and the lower valve stem 32 and the valve body 1. Through the above design, the double sealing and high-efficiency sealing effects are achieved.

[0053] The various devices selected in this application (components whose specific structures are not described) are all universal standard parts or components known to those skilled in the art, and their structures and principles can be known to those skilled in the art through technical manuals or conventional experimental methods.

[0054] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0056] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A butterfly valve with good sealing performance, characterized in that: include: A valve body (1), and a valve plate (2) disposed in the valve body (1); in A sealing rubber strip (21) is provided on the arc surface of the valve plate (2); A valve stem assembly (3) comprising: an upper valve stem (31) and a lower valve stem (32) penetrating through a valve body (1); wherein The upper valve stem (31) and the lower valve stem (32) are respectively connected to the valve plate (2) so as to drive the valve plate (2) to open or close by rotating; The sealing rubber strip (21) is suitable for abutting against the valve body (1) when the valve plate (2) is closed, so as to seal the valve body (1); The valve body (1) comprises: a male part (11), a female part (12) adapted to the male part (11), and half rings (13) respectively arranged on the male part (11) and the female part (12); wherein The half circles (13) on the male part (11) and the female part (12) are arranged on non-same sides; and The two half circles (13) are suitable for contacting the valve plate (2) when the valve plate (2) is closed; The surface of the half circle (13) is coated with gel.

2. The butterfly valve with good sealing performance as claimed in claim 1, characterized in that: The valve stem assembly (3) further comprises: a packing sleeve (33) respectively sleeved on the upper valve stem (31) and the lower valve stem (32); The outer side of the packing sleeve (33) is in contact with the valve body (1).

3. The butterfly valve with good sealing performance as claimed in claim 2, characterized in that: A first opening (311) is formed at the bottom of the upper valve stem (31); A second opening (321) is formed at the top of the lower valve stem (32); The upper end and the lower end of the valve plate (2) are respectively inserted into the first opening (311) and the second opening (321).

4. The butterfly valve with good sealing performance as claimed in claim 3, characterized in that: The male part (11) and the female part (12) are suitable for being connected by bolts; The side surfaces of the male part (11) and the female part (12) are both provided with a plurality of mounting through holes (14); The two half circles (13) are provided with bolt holes (131) which are concentric with the mounting through holes (14); wherein The two half rings (13) are suitable for being connected by bolts; and The bolt is adapted to pass through the mounting through hole (14) and then engage with the bolt hole (131), so that the two half circles (13) are respectively connected to the male part (11) and the female part (12).

5. The butterfly valve with good sealing performance as claimed in claim 4, characterized in that: A first limit block (15) is provided at the bottom of the valve body (1); A second limit block (16) is provided on the top of the valve body (1); wherein The second limit block (16) is sleeved on the upper valve stem (31).

6. The butterfly valve with good sealing performance as claimed in claim 5, characterized in that: A gear portion (312) is provided at the top of the upper valve stem (31).

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