Balance valve with high sealing performance

Abstract

The balance valve comprises a valve body and butt joint pipes arranged at the two ends of the valve body, inner flange plates are fixed to the two sides of the surface of the valve body respectively, outer flange plates are fixed to the surfaces of the two butt joint pipes respectively, threaded holes are formed in the side faces of the inner flange plates and the side faces of the outer flange plates respectively in a penetrating mode, and the inner flange plates and the outer flange plates are connected through the threaded holes. A primary positioning mechanism is arranged between the outer flange plate and the inner flange plate, the primary positioning mechanism is used for quickly aligning threaded holes in the outer flange plate and the inner flange plate, and a double-sealing assembly is arranged between the butt joint pipe and the valve body. According to the balance valve with the high sealing performance, the positioning insertion rods on the outer flange plate are aligned with the positioning insertion holes in the inner flange plate and inserted into the positioning insertion holes, so that the corresponding threaded holes in the outer flange plate and the inner flange plate can be quickly aligned, the later sealing performance cannot be affected, and double sealing is achieved through the arrangement of the double sealing assemblies; and the sealing performance between the valve body and the butt joint pipe is further improved.

Description

Technical Field

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

[0002] When installing an existing balancing valve, for the sake of sealing, it is necessary to align the threaded holes of the balancing valve flange with the threaded holes of the butt pipe flange. However, there is no positioning mechanism between the existing balancing valve flange and the butt pipe flange, which results in the inability to quickly align the corresponding threaded holes, thereby affecting the subsequent sealing. In addition, the sealing structure is generally simple and needs to be further improved. Therefore, the utility model proposes a balancing valve with high sealing performance to solve the above-mentioned problems. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a balancing valve with high sealing performance, which solves the problems mentioned in the above background technology.

[0004] To achieve the above objectives, the utility model is implemented through the following technical solutions: a balancing valve with high sealing performance, comprising a valve body and a butt joint pipe arranged at both ends of the valve body, inner flanges are fixed on both sides of the surface of the valve body, outer flanges are fixed on the surfaces of the two butt joint pipes, threaded holes are penetrated through the sides of the inner flange and the outer flange, a preliminary positioning mechanism is arranged between the outer flange and the inner flange, the preliminary positioning mechanism is used to quickly align the threaded holes on the outer flange and the inner flange, and a double sealing assembly is arranged between the butt joint pipe and the valve body.

[0005] Preferably, the preliminary positioning mechanism comprises a positioning rod fixed to the inner side of the outer flange, and the inner flange is provided with a positioning hole matched with the positioning rod.

[0006] Preferably, two of the positioning rods and two of the positioning holes are provided, and the ends of the positioning rods are of pointed design.

[0007] Preferably, the double sealing assembly includes an inner sealing ring fixed to the end of the butt tube, an outer sealing ring fixed to the end of the valve body for use with the inner sealing ring, a convex ring is provided on the side of the outer sealing ring, and an annular slot matching the convex ring is provided on the side of the inner sealing ring.

[0008] Preferably, the double sealing assembly further comprises a first contact sealing ring embedded and fixed on the side surface of the inner flange, and a second contact sealing ring used in conjunction with the first contact sealing ring is embedded and fixed on the side surface of the outer flange.

[0009] Preferably, a bolt is passed between two adjacent threaded holes, and a nut is threadedly connected to the surface of the bolt. Beneficial Effects

[0010] The utility model provides a balancing valve with high sealing performance. Compared with the prior art, it has the following beneficial effects:

[0011] The balancing valve with high sealing performance is realized by aligning the positioning plug rod on the outer flange with the positioning plug hole on the inner flange and inserting it, so that the corresponding threaded holes on the outer flange and the inner flange can be quickly aligned without affecting the subsequent sealing performance. The double sealing component is provided to achieve double sealing, thereby further improving the sealing performance between the valve body and the butt pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional exploded diagram of the overall structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the local structure of the valve body of the utility model;

[0014] Figure 3 It is a schematic diagram of the butt-jointed pipe structure of the utility model.

[0015] In the figure: 1-valve body, 2-butt pipe, 3-inner flange, 4-outer flange, 5-threaded hole, 6-preliminary positioning mechanism, 61-positioning plug rod, 62-positioning socket, 7-double sealing assembly, 71-inner sealing ring, 72-outer sealing ring, 73-convex ring, 74-annular slot, 75-first contact sealing ring, 76-second contact sealing ring, 8-bolt, 9-nut. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0017] See also Figure 1-3 The utility model provides a technical solution: a balancing valve with high sealing performance, comprising a valve body 1 and a butt pipe 2 arranged at both ends of the valve body 1, inner flanges 3 are fixed on both sides of the surface of the valve body 1, outer flanges 4 are fixed on the surfaces of the two butt pipes 2, threaded holes 5 are penetrated through the sides of the inner flange 3 and the outer flange 4, bolts 8 are passed through between two adjacent threaded holes 5, nuts 9 are threadedly connected on the surfaces of the bolts 8, and the nuts 9 cooperate with the bolts 8 so that the outer flange 4 and the inner flange 3 can be stably connected together, a preliminary positioning mechanism 6 is arranged between the outer flange 4 and the inner flange 3, the preliminary positioning mechanism 6 is used to quickly align the threaded holes 5 on the outer flange 4 and the inner flange 3, and a double sealing component 7 is arranged between the butt pipe 2 and the valve body 1.

[0018] The preliminary positioning mechanism 6 includes a positioning rod 61 fixed on the inner side of the outer flange 4, and a positioning hole 62 matched with the positioning rod 61 is opened on the inner flange 3. There are two positioning rods 61 and two positioning holes 62. The end of the positioning rod 61 is designed with a pointed head. The pointed head design allows the positioning rod 61 to be quickly inserted into the positioning hole 62 to achieve positioning, thereby allowing the threaded holes 5 on the outer flange 4 and the inner flange 3 to be quickly aligned.

[0019] The double sealing assembly 7 includes an inner sealing ring 71 fixed to the end of the butt pipe 2, an outer sealing ring 72 used in conjunction with the inner sealing ring 71 is fixed to the end of the valve body 1, a convex ring 73 is provided on the side of the outer sealing ring 72, the convex ring 73 and the outer sealing ring 72 are integrally formed, and an annular slot 74 matched with the convex ring 73 is provided on the side of the inner sealing ring 71. The convex ring 73 is inserted into the annular slot 74 to increase the contact area between the inner sealing ring 71 and the outer sealing ring 72, thereby improving the sealing performance. The double sealing assembly 7 also includes a first contact sealing ring 75 embedded and fixed on the side of the inner flange 3, and a second contact sealing ring 76 used in conjunction with the first contact sealing ring 75 is embedded and fixed on the side of the outer flange 4. Through the contact between the first contact sealing ring 75 and the second contact sealing ring 76, double sealing is achieved, thereby further improving the sealing performance between the valve body 1 and the butt pipe 2.

[0020] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0021] When in use, bring the butt joint pipes 2 on both sides close to the valve body 1, then align the positioning rods 61 on the outer flange 4 with the positioning holes 62 on the inner flange 3 and insert them, so that the corresponding threaded holes 5 on the outer flange 4 and the inner flange 3 can be quickly aligned, and then screw the corresponding bolts 8 through the two threaded holes 5, and then tighten them with the nuts 9. After the outer flange 4 and the inner flange 3 are stably connected, the corresponding convex ring 73 is embedded in the annular slot 74, the inner sealing ring 71 is in close contact with the outer sealing ring 72, and the first contact sealing ring 75 is in contact with the second contact seal 76, so as to achieve stable sealing after the butt joint pipe 2 is connected to the valve body 1.

[0022] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A balancing valve with high sealing performance, comprising a valve body (1) and butt-joint pipes (2) arranged at both ends of the valve body (1), characterized in that: Inner flanges (3) are fixed on both sides of the surface of the valve body (1), and outer flanges (4) are fixed on the surfaces of the two butt-joint pipes (2). Threaded holes (5) are provided through the sides of the inner flanges (3) and the outer flanges (4). A preliminary positioning mechanism (6) is provided between the outer flanges (4) and the inner flanges (3). The preliminary positioning mechanism (6) is used to quickly align the threaded holes (5) on the outer flanges (4) and the inner flanges (3). A double sealing component (7) is provided between the butt-joint pipes (2) and the valve body (1).

2. A balancing valve with high sealing performance according to claim 1, characterized in that: The preliminary positioning mechanism (6) comprises a positioning rod (61) fixed to the inner side of the outer flange (4), and a positioning hole (62) adapted to the positioning rod (61) is provided on the inner flange (3).

3. A balancing valve with high sealing performance according to claim 2, characterized in that: Two of the positioning rods (61) and two of the positioning holes (62) are provided, and the end of the positioning rod (61) is of pointed design.

4. A balancing valve with high sealing performance according to claim 1, characterized in that: The double sealing assembly (7) comprises an inner sealing ring (71) fixed to the end of the butt-jointed pipe (2); an outer sealing ring (72) used in conjunction with the inner sealing ring (71) is fixed to the end of the valve body (1); a convex ring (73) is provided on the side of the outer sealing ring (72); and an annular slot (74) matched with the convex ring (73) is provided on the side of the inner sealing ring (71).

5. A balancing valve with high sealing performance according to claim 1, characterized in that: The double sealing assembly (7) further comprises a first contact sealing ring (75) embedded and fixed on the side of the inner flange (3), and a second contact sealing ring (76) for use in conjunction with the first contact sealing ring (75) is embedded and fixed on the side of the outer flange (4).

6. A balancing valve with high sealing performance according to claim 1, characterized in that: A bolt (8) is inserted between two adjacent threaded holes (5), and a nut (9) is threadedly connected to the surface of the bolt (8).

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