Side-mounted eccentric C-shaped ball valve

Abstract

The invention relates to the technical field of valves, and discloses a side-mounted eccentric C-shaped ball valve which comprises a valve body, a valve cover, a ball body and a sealing assembly, the valve cover is connected with the valve body, and a flow channel in the valve body is communicated with a flow channel in the valve cover; the ball body is fixed in a flow channel between the valve body and the valve cover through the valve rod; the sealing assembly is arranged in a mounting groove, close to the end part of the ball body, of the valve cover; the sealing assembly is fixed in the mounting groove of the valve cover through abutting of the valve body; the sealing assembly is suitable for abutting against the ball to seal the flow channel. According to the side-mounted eccentric C-shaped ball valve, the mounting groove is formed in the end, close to the ball body, of the valve cover, the sealing assembly is arranged in the mounting groove, and when the valve cover and the valve body are mounted, the valve body abuts against the sealing assembly, so that the sealing assembly is fixed in the mounting groove of the valve cover; and in addition, punching in the valve body or the valve cover can be avoided, the valve mounting and dismounting process is greatly simplified, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of valves, and in particular to a side-mounted eccentric C-type ball valve. Background Art

[0002] The eccentric C-type ball valve (also known as the "eccentric hemispherical valve") is a valve in which the center axis of the valve shaft is eccentric to the center line of the hemispherical body (C-type ball), and a sealing pair is only provided on one side of the valve body. The typical structure is that a single valve seat is located downstream of the valve, and the valve relies on the torque transmitted by the valve stem to achieve sealing.

[0003] From a design perspective, there are a variety of options for the installation and fixing of the valve seat of a side-mounted eccentric C-type ball valve. For example, the C-type eccentric hemispheric valve disclosed in Chinese invention patent CN202012634U, the ball and valve seat are installed from the right valve body flange and the channel. This installation method has a simple and compact overall structure and low cost, but it destroys the integrity of the valve body flange sealing surface and affects its sealing performance. For another example, Chinese invention patent CN203847747U discloses a high-performance C-type wear-resistant ball valve, which uses a baffle to fix the valve seat, and the baffle is fixed to the valve cover with screws. Although it can ensure the integrity of the valve body flange sealing surface, it is necessary to process multiple threaded holes on the valve cover for installing the baffle, which is difficult to process, and this part of the thread is in contact with the medium for a long time, which is prone to thread corrosion failure.

[0004] To this end, the present invention provides a side-mounted eccentric C-type ball valve to solve the problem of fixing the valve seat of the side-mounted eccentric C-type ball valve. Summary of the invention

[0005] In view of this, the present invention provides a side-mounted eccentric C-type ball valve to solve the problem of fixing the valve seat of the side-mounted eccentric C-type ball valve.

[0006] In a first aspect, the present invention provides a side-mounted eccentric C-type ball valve, comprising:

[0007] Valve body;

[0008] A valve cover connected to the valve body, wherein the internal flow channel of the valve body is in communication with the internal flow channel of the valve cover;

[0009] A ball is fixed in the flow channel between the valve body and the valve cover through a valve stem; the ball is configured to rotate in the flow channel driven by the valve stem to close or open the flow channel;

[0010] The sealing component is arranged in the installation groove of the valve cover near the end of the ball body, and the sealing component is fixed in the installation groove of the valve cover through the abutment of the valve body; the sealing component is suitable for abutting with the ball body to close the flow channel.

[0011] In an optional embodiment, the sealing assembly includes:

[0012] A valve seat, disposed inside the mounting groove, the valve seat being adapted to abut against the ball;

[0013] A filler, filled between the valve seat and the inner wall of the mounting groove;

[0014] One side of the baffle plate abuts against the valve body, and the other side of the baffle plate abuts against the valve cover and the valve seat.

[0015] In an optional embodiment, the filler is a graphite filler;

[0016] During the installation of the valve cover and the valve body, the valve cover is configured to move toward the valve body and press the valve seat and the graphite packing, and the baffle abuts against the valve body and provides support for the valve seat and the graphite packing.

[0017] In an optional embodiment, the filler is replaced with an O-ring or a lip seal or a combination of an O-ring and graphite filler or a combination of an O-ring and fireproof graphite or a combination of a lip seal and fireproof graphite.

[0018] In an optional embodiment, during the installation of the valve cover and the valve body, the baffle abuts against the valve body and provides support for the valve seat.

[0019] In an optional embodiment, the inner wall of the installation groove is stepped, and the filler is arranged on the stepped surface at the bottom of the installation groove.

[0020] In an optional embodiment, a limiting groove for accommodating the baffle is provided at the end of the valve body, and the end of the valve cover is suitable for being inserted into the limiting groove to abut against the baffle.

[0021] In an optional embodiment, the baffle is annular, the outer ring of the baffle is arranged in the limiting groove, and the inner ring of the baffle is arranged in the valve cover installation groove and abuts against the valve seat.

[0022] In an optional embodiment, corresponding bolt holes are provided on the valve body and the valve cover, and the valve body and the valve cover are fixed by bolts.

[0023] The side-mounted eccentric C-type ball valve provided by the present invention has the following advantages:

[0024] 1. The present invention provides a side-mounted eccentric C-type ball valve, comprising a valve body, a valve cover, a ball and a sealing assembly, wherein the valve cover is connected to the valve body, and the internal flow channel of the valve body is communicated with the internal flow channel of the valve cover; the ball is fixed in the flow channel between the valve body and the valve cover through a valve stem; the ball is configured to rotate in the flow channel driven by the valve stem to close or open the flow channel; the sealing assembly is arranged in an installation groove of the valve cover near the end of the ball, and the sealing assembly is fixed in the installation groove of the valve cover through abutment with the valve body; the sealing assembly is suitable for abutting with the ball to close the flow channel.

[0025] By arranging an installation groove on the valve cover near the end of the ball body, the sealing assembly is arranged inside the installation groove. When the valve cover and the valve body are installed, the valve body abuts against the sealing assembly to thereby fix the sealing assembly inside the installation groove of the valve cover. Compared with the current technology in which the valve seat is installed from the outside of the valve body and then fixed by a pressure ring, or the valve seat is fixed inside the valve cover with a bolt component, the side-mounted eccentric C-type ball valve provided in this embodiment does not need to destroy the integrity of the sealing surface of the valve body or valve cover flange, and can avoid drilling holes inside the valve body or valve cover, which greatly simplifies the valve installation and disassembly process and improves production efficiency.

[0026] 2. The present invention provides a side-mounted eccentric C-type ball valve, in which graphite filler is used as the filler. During the installation of the valve cover and the valve body, the valve cover is configured to move toward the valve body and squeeze the valve seat and the filler, and the baffle abuts against the valve body and provides support for the valve seat and the filler.

[0027] During the installation of the valve cover and the valve body, the graphite packing needs a certain degree of compression to play a sealing role. Therefore, when the valve is assembled, before the graphite packing is compressed, the valve seat is relatively convex. Therefore, a baffle is provided. When the valve cover moves toward the valve body during installation, the valve seat will be squeezed toward the valve body. However, the baffle cannot move due to the limitation of the valve body. Therefore, when the valve cover squeezes the valve seat toward the valve body, the baffle will abut against the valve seat, thereby achieving compression of the graphite packing by squeezing the valve seat while the valve cover moves toward the valve body during installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural view of a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention;

[0030] Figure 2It is a schematic structural view of a valve body, a valve cover and a sealing assembly in a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention;

[0031] Figure 3 for Figure 1 A magnified view of the structure at the center circle A;

[0032] Figure 4 It is a schematic diagram of the installation of the valve cover when a graphite packing is used in a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention;

[0033] Figure 5 It is a schematic structural view of a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention when the packing adopts an O-ring and a graphite packing;

[0034] Figure 6 A schematic structural view of a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention when the packing material is an O-ring and fireproof graphite;

[0035] Figure 7 It is a schematic structural view of a side-mounted eccentric C-type ball valve provided in an embodiment of the present invention when the packing adopts a lip seal ring and fire-proof graphite.

[0036] Description of reference numerals:

[0037] 1- Valve body;

[0038] 2-valve cover;

[0039] 3-sphere;

[0040] 4-valve stem;

[0041] 51-valve seat; 52-graphite packing; 521-O-ring; 522-lip seal ring; 523-fireproof graphite; 53-baffle;

[0042] 6-Bolts. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying 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 direction, be constructed and operated in a specific direction, 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. In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Example

[0046] This embodiment provides a side-mounted eccentric C-type ball valve, such as Figure 1 As shown, it includes a valve body 1, a valve cover 2, a ball 3 and a sealing assembly, the valve cover 2 is connected to the valve body 1, and the internal flow channel of the valve body 1 is communicated with the internal flow channel of the valve cover 2; the ball 3 is fixed in the flow channel between the valve body 1 and the valve cover 2 through the valve stem 4; the ball 3 is configured to rotate in the flow channel driven by the valve stem 4 to close or open the flow channel; the sealing assembly is arranged in the installation groove of the valve cover 2 near the end of the ball 3, and the sealing assembly is fixed in the installation groove of the valve cover 2 by abutting against the valve body 1; the sealing assembly is suitable for abutting against the ball 3 to close the flow channel.

[0047] By setting an installation groove on the end of the valve cover 2 near the ball 3, the sealing assembly is set inside the installation groove. When the valve cover 2 and the valve body 1 are installed, the valve body 1 abuts against the sealing assembly to fix the sealing assembly inside the installation groove of the valve cover 2. Compared with the current technology in which the valve seat is installed from the outside of the valve body and then fixed by a pressure ring, or the valve seat is fixed inside the valve cover with a bolt component, the side-mounted eccentric C-type ball valve provided in this embodiment does not need to destroy the integrity of the flange sealing surface of the valve body 1 or the valve cover 2, and can avoid drilling holes inside the valve body 1 or the valve cover 2, which greatly simplifies the valve installation and disassembly process and improves production efficiency.

[0048] In this embodiment, if Figure 1 and Figure 2 As shown, the sealing assembly includes a valve seat 51, a packing and a baffle 53. The valve seat 51 is arranged inside the mounting groove, and the valve seat 51 is suitable for abutting against the ball 3; the packing is filled between the valve seat 51 and the inner wall of the mounting groove; one side of the baffle 53 abuts against the valve body 1, and the other side of the baffle 53 abuts against the valve cover 2 and the valve seat 51.

[0049] By setting the valve seat 51 inside the installation groove, the valve seat 51 is suitable for abutting against the ball 3, and is used to close the internal flow channel of the valve body 1. Filling the gap between the valve seat 51 and the inner wall of the installation groove can seal the gap between the valve seat 51 and the inner wall of the installation groove to prevent leakage between the valve seat 51 and the inner wall of the installation groove. By setting one side of the baffle plate 53 to abut against the valve body 1, and the other side of the baffle plate 53 to abut against the valve cover 2 and the valve seat 51, when the valve cover 2 is installed, the valve cover 2 abuts against the baffle plate 53 to fix the baffle plate 53. At the same time, the other side of the baffle plate 53 abuts against the valve cover 2 and the valve seat 51. When the baffle plate 53 is fixed, the baffle plate 53 can also abut and fix the valve seat 51.

[0050] In this embodiment, if Figure 3 As shown, the filler is a graphite filler 52. During the installation of the valve cover 2 and the valve body 1, the valve cover 2 is configured to move toward the valve body 1 and squeeze the valve seat 51 and the graphite filler 52. The baffle 53 abuts against the valve body 1 and provides support for the valve seat 51 and the graphite filler 52.

[0051] During the installation of the valve cover 2 and the valve body 1, if Figure 4 As shown, the graphite packing 52 needs a certain compression to play a sealing role. Therefore, when the valve is assembled, before the graphite packing 52 is compressed, the valve seat 51 is relatively convex. Therefore, a baffle 53 is provided. When the valve cover 2 moves toward the valve body 1 during installation, the valve seat 51 will be squeezed toward the valve body 1. The baffle 53 cannot move due to the limitation of the valve body 1. Therefore, when the valve cover 2 squeezes the valve seat 51 toward the valve body 1, the baffle 53 will abut against the valve seat 51. Therefore, during the installation process, the valve cover 2 can move toward the valve body 1 and compress the graphite packing 52 by squeezing the valve seat 51.

[0052] As an alternative, Figure 5 The structure schematic diagram of the packing is shown when the packing is an O-ring 521 and a graphite packing 52. At this time, the packing is composed of the O-ring 521 and the graphite packing 52, and the O-ring 521 is located inside the graphite packing 52.

[0053] As an alternative, Figure 6 The structure schematic diagram of the packing is shown as O-ring 521 and fireproof graphite 523. At this time, the packing is composed of O-ring 521 and fireproof graphite 523, and the fireproof graphite 523 is located inside the O-ring 521.

[0054] As an alternative, Figure 7 The structure schematic diagram of the packing is shown when the packing is a lip seal ring 522 and a fireproof graphite 523. At this time, the packing is composed of the lip seal ring 522 and the fireproof graphite 523, and the fireproof graphite 523 is located inside the lip seal ring 522.

[0055] In this embodiment, if Figures 3 to 7 As shown, the inner wall of the installation groove is stepped, and the filler is arranged at the stepped surface at the bottom of the installation groove. By setting the inner wall of the installation groove to be stepped, during the installation process of the valve cover 2, the sealing assembly is fixed by the step surface abutting against the sealing assembly.

[0056] In this embodiment, if Figures 3 to 7 As shown, a limiting groove for placing the baffle 53 is provided at the end of the valve body 1 , and the end of the valve cover 2 is suitable for inserting into the limiting groove to abut against the baffle 53 .

[0057] In this embodiment, the baffle 53 is annular, the outer ring of the baffle 53 is arranged in the limiting groove, and the inner ring of the baffle 53 is arranged in the installation groove of the valve cover 2 and abuts against the valve seat 51.

[0058] By setting the outer ring of the baffle plate 53 in the limiting groove, when the valve cover 2 is installed, the outer ring of the baffle plate 53 can be abutted and fixed by the valve cover 2. At the same time, by setting the inner ring of the baffle plate 53 in the installation groove of the valve cover 2 and abutting against the valve seat 51, the valve seat 51 can be abutted and fixed by the inner ring of the baffle plate 53, and when the filler is a graphite filler 52, the graphite filler 52 can be pressed by the abutment of the inner ring of the baffle plate 53 against the valve seat 51.

[0059] In this embodiment, corresponding bolt holes are provided on the valve body 1 and the valve cover 2 , and the valve body 1 and the valve cover 2 are fixed by bolts 6 .

[0060] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A side-mounted eccentric C-type ball valve, characterized in that: include: Valve body (1); A valve cover (2) is connected to the valve body (1), and an internal flow passage of the valve body (1) is in communication with an internal flow passage of the valve cover (2); A ball (3) is fixed in the flow channel between the valve body (1) and the valve cover (2) via a valve stem (4); the ball (3) is configured to rotate in the flow channel driven by the valve stem (4) to close or open the flow channel; A sealing component (5) is arranged inside a mounting groove of the valve cover (2) close to the end of the ball (3); the sealing component (5) is fixed inside the mounting groove of the valve cover (2) by abutting against the valve body (1); the sealing component (5) is suitable for abutting against the ball (3) to close the flow channel.

2. The side-mounted eccentric C-type ball valve according to claim 1, characterized in that: The sealing assembly (5) comprises: A valve seat (51) is arranged inside the mounting groove, and the valve seat (51) is suitable for abutting against the ball (3); Filler, filled between the valve seat (51) and the inner wall of the installation groove; One side of the baffle plate (53) abuts against the valve body (1), and the other side of the baffle plate (53) abuts against the valve cover (2) and the valve seat (51).

3. The side-mounted eccentric C-type ball valve according to claim 2, characterized in that: The filler is a graphite filler (52); During the installation process of the valve cover (2) and the valve body (1), the valve cover (2) is configured to move toward the valve body (1) and squeeze the valve seat (51) and the graphite packing (52), and the baffle (53) abuts against the valve body (1) and provides support for the valve seat (51) and the graphite packing (52).

4. The side-mounted eccentric C-type ball valve according to claim 2, characterized in that: The filler is sealed by an O-ring (521) or a lip seal ring (522) or a combination of an O-ring (521) and a graphite filler (52) or a combination of an O-ring (521) and a fireproof graphite (523) or a combination of a lip seal ring (522) and a fireproof graphite (523).

5. The side-mounted eccentric C-type ball valve according to claim 4, characterized in that: During the installation process of the valve cover (2) and the valve body (1), the baffle (53) abuts against the valve body (1) and provides support for the valve seat (51).

6. The side-mounted eccentric C-type ball valve according to claim 2 or 4, characterized in that: The inner wall of the installation groove is stepped, and the filler is arranged on the stepped surface at the bottom of the installation groove.

7. The side-mounted eccentric C-type ball valve according to claim 6, characterized in that: The end of the valve body (1) is provided with a limiting groove for accommodating the baffle (53), and the end of the valve cover (2) is suitable for being inserted into the limiting groove to abut against the baffle (53).

8. The side-mounted eccentric C-type ball valve according to claim 7, characterized in that: The baffle plate (53) is annular, the outer ring of the baffle plate (53) is arranged in the limiting groove, and the inner ring of the baffle plate (53) is arranged in the installation groove of the valve cover (2) and abuts against the valve seat (51).

9. The side-mounted eccentric C-type ball valve according to claim 3, characterized in that: The valve body (1) and the valve cover (2) are provided with corresponding bolt holes, and the valve body (1) and the valve cover (2) are fixed by bolts (6).

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