Gate valve structure capable of reducing assembling procedures and reducing sealing leakage points

Abstract

The invention discloses a gate valve structure capable of reducing assembly procedures and reducing sealing leakage points. The gate valve structure comprises a valve body, a valve rod, a valve cover, a gate plate and a hand wheel. The valve rod and the valve cover are designed to be of an integrated structure, a positioning buckle structure is arranged between the valve cover and the valve body, the valve cover and the valve body are positioned through the positioning buckle structure, and the valve cover can rotate relative to the valve body; and a plurality of sealing rings are arranged between the valve cover and the valve body. The valve rod and the valve cover are designed to be of an integrated structure, a corresponding installation connecting structure is arranged, the valve rod and the valve cover rotate integrally in the using process through a positioning buckle structure, due to the fact that the valve rod and the valve cover are of the integrated structure, a sealing structure does not need to be installed between the valve rod and the valve cover, sealing leakage points are reduced, and the problem that replacement operation is troublesome does not need to be considered; the pressing assembly is simple and convenient, assembly procedures are greatly reduced, assembly is convenient, and efficiency is high.

Description

Technical Field

[0001] The invention belongs to the technical field of gate valves, and in particular relates to a gate valve structure with reduced assembly procedures and reduced sealing leakage points. Background Art

[0002] The gate valve is one of many valves. Due to its unique structure, small flow resistance, durability, and simple use, it is widely used in tap water, sewage, construction, petroleum, chemical, food, medicine and other industries. The movement direction of the gate of the gate valve is perpendicular to the direction of the fluid. During the opening and closing process, the hand wheel and the valve stem can move relative to each other. By turning the hand wheel, the valve stem rotates and the valve plate at the bottom is driven up and down.

[0003] In the existing gate valve structure design, the valve stem and the valve cover are separate. The valve stem passes through the middle hole on the valve cover and is connected to the gate plate. The valve cover plays a positioning role in the installation and rotation of the valve stem. In order to ensure the sealing of the gate valve, a sealing packing or a sealing structure is provided between the valve stem and the valve cover. There are many sealing leakage points, and the sealing packing or the sealing structure is easy to wear and tear, and it is often necessary to replace it. At present, when replacing the sealing packing, it is necessary to close the operation, and the replacement and closing operation is very troublesome. During the replacement process, the hand wheel, valve stem, and valve cover need to be disassembled, which makes the replacement very inconvenient; at the same time, the assembly tools between the valve cover and the valve stem are also very inconvenient. Therefore, it is necessary to improve the existing structural design defects. Summary of the invention

[0004] The purpose of the present invention is to solve the problems raised in the above background technology and provide a gate valve structure which reduces assembly procedures and reduces sealing leakage points.

[0005] To achieve the above-mentioned purpose, the technical solution of the present invention is: a gate valve structure that reduces assembly procedures and reduces sealing leakage points, including a valve body, a valve stem, a valve cover, a gate plate, and a handwheel; the valve stem and the valve cover are designed as an integrated structure, and a positioning buckle structure is provided between the valve cover and the valve body. The valve cover is positioned between the positioning buckle structure and the valve body and can rotate relative to the valve body; a plurality of sealing rings are provided between the valve cover and the valve body.

[0006] In the above-mentioned gate valve structure that reduces assembly procedures and reduces sealing leakage points, a connecting hole is provided on the valve body, and the positioning buckle structure is respectively provided with an inner mounting ring groove on the valve cover, an outer mounting ring groove in the connecting hole, and an opening clamp ring matched in the inner mounting ring groove and the outer mounting ring groove; a push-up inclined surface is provided on one side of the inner mounting ring groove on the valve cover, and a seal is formed between the multiple sealing rings on the valve cover and the connecting hole of the valve body.

[0007] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, the inner diameter of the opening clamp ring is smaller than the outer diameter of the inner mounting ring groove and the outer diameter is larger than the inner diameter of the outer mounting ring groove when the opening clamp ring is not normally stressed.

[0008] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, an annular assembly slope is provided at the opening of the connecting hole.

[0009] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, a positioning boss that can abut against the valve body is provided on the valve cover.

[0010] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, the end of the valve stem is fixedly connected to the hand wheel by a nut.

[0011] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, the valve cover is provided with a plurality of sealing installation grooves, and the sealing rings are installed in the sealing installation grooves and between the connecting holes of the valve body to form a seal.

[0012] In the above-mentioned gate valve structure that reduces assembly procedures and reduces sealing leakage points, the valve cover and the connecting hole are respectively provided with corresponding mounting parts and sealing parts, the mounting parts on the valve cover and the connecting hole are matched to be rotated for positioning, the inner mounting ring groove and the outer mounting ring groove are respectively provided on the mounting parts of the valve cover and the connecting hole, and the sealing mounting groove is provided on the sealing part of the valve cover to form a seal with the sealing part of the connecting hole.

[0013] In the above-mentioned gate valve structure with reduced assembly procedures and reduced sealing leakage points, a push-off inclined surface is also provided on one side of the valve cover and the inner mounting ring groove.

[0014] Effects of the present invention: The present invention designs the valve stem and the valve cover as an integrated structure and provides a corresponding installation and connection structure. The valve stem and the valve cover rotate together during use through the positioning buckle structure. Since the valve stem and the valve cover are an integrated structure, there is no need to install a sealing structure between the two, which reduces sealing leakage points and does not require consideration of the troublesome replacement operation.

[0015] During assembly, the present invention uses a tool to assemble the open clamp ring into the connecting hole of the valve body. When assembling the valve stem and valve cover, it is only necessary to press the connecting hole to position the open clamp ring and the valve cover. Compared with the existing structural design, the assembly process is greatly reduced, and the assembly is convenient and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a stereogram of the present invention; Figure 2 is an exploded view of the present invention; Figure 3is a cross-sectional view of the present invention; Figure 4 yes Figure 3 Enlarged view of part A in the middle; Figure 5 It is a three-dimensional cross-sectional view of the valve body in the present invention. DETAILED DESCRIPTION

[0017] The present invention will be further described in conjunction with the accompanying drawings.

[0018] See also Figures 1 to 5 The present invention provides a gate valve structure that reduces assembly procedures and reduces sealing leakage points, including a valve body 1, a valve stem 2, a valve cover 3, a gate plate 4, and a hand wheel 5; the valve stem 2 and the valve cover 3 are designed as an integrated structure, and the end of the valve stem 2 is fixedly connected to the hand wheel 5 by a nut 14. When in use, the hand wheel is rotated to drive the valve stem and valve cover to rotate relative to the valve body.

[0019] A positioning buckle structure is provided between the valve cover 3 and the valve body 1, and a connecting hole 7 is provided on the valve body 1. The positioning buckle structure is respectively provided with an inner mounting ring groove 8 on the valve cover 3, an outer mounting ring groove 9 in the connecting hole 7, and an open clamp 10 matched in the inner mounting ring groove 8 and the outer mounting ring groove 9. A push inclined surface 11 is provided on the valve cover 3 and on one side of the inner mounting ring groove 8; corresponding mounting portions 16 and sealing portions 17 are respectively provided on the valve cover 3 and the connecting hole 7, and the mounting portions 16 on the valve cover 3 and the connecting hole 7 are matched to rotate for positioning, the inner mounting ring groove 8 and the outer mounting ring groove 9 are respectively provided on the valve cover 3 and the mounting portions 16 of the connecting hole 7, and a sealing mounting groove 15 is provided on the sealing portion 17 of the valve cover 3 to form a seal with the sealing portion of the connecting hole 7.

[0020] During assembly, the open clamp ring 10 is clamped and shrunken by a special assembly tool and placed into the outer mounting ring groove 9 of the connecting hole. Since the outer diameter of the open clamp ring 10 is larger than the inner diameter of the outer mounting ring groove 9 under normal stress-free state, the open clamp ring 10 is placed in the outer mounting ring groove 9 and forms a positioning abutment with the outer mounting ring groove 9 when no force is applied. Then, when assembling the valve stem and valve cover, align the connecting hole on the valve body, and then apply force to press the valve stem and valve cover. The push inclined surface 11 on the valve cover 3 will open the open clamp ring 10 until the inner mounting ring groove 8 on the valve cover corresponds to the open clamp ring 10. The shrinkage of the open clamp ring 10 is in the normal state and is aligned with the inner mounting ring groove 8. At this time, the open clamp ring 10 simultaneously abuts against the valve cover 3 and the valve body 1, thereby completing the installation and connection of the valve cover and valve stem, which is very convenient. The valve cover 3 is positioned with the valve body 1 through the positioning buckle structure and can rotate relative to the valve body 1.

[0021] A plurality of sealing rings 6 are arranged between the valve cover 3 and the valve body 1, and a seal is formed between the plurality of sealing rings 6 and the connecting holes 7 of the valve body 1. A plurality of sealing installation grooves 15 are arranged on the valve cover 3, and the sealing rings 6 are installed in the sealing installation grooves 15 to form a seal between the connecting holes 7 of the valve body 1. The sealing rings are installed at the same time when the valve cover is assembled.

[0022] Furthermore, in order to facilitate the assembly of the open collar 10 , an annular assembly slope 12 is provided at the opening of the connecting hole 7 .

[0023] Furthermore, the valve cover 3 is provided with a positioning boss 13 which can abut against the valve body 1. The mounting parts 16 on the valve cover 3 and the connecting hole 7 are matched to rotate for positioning, and then cooperate with the abutment positioning of the positioning boss 13, so as to position the rotation of the valve cover and prevent shaking.

[0024] Furthermore, a push-off inclined surface 18 is provided on one side of the valve cover 3 and the inner mounting ring groove 8, so that when the valve cover needs to be removed, the opening clamping ring 10 can be pushed open by pulling through the push-off inclined surface 18 to facilitate removal.

[0025] The above is a detailed introduction to a gate valve structure for reducing assembly processes and sealing leakage points provided by an embodiment of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solutions disclosed by the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the content of this specification should not be understood as a limitation of the present invention.

Claims

1. A gate valve structure that reduces assembly processes and reduces sealing leakage points, comprising a valve body (1), a valve stem (2), a valve cover (3), a gate plate (4), and a hand wheel (5); characterized in that: The valve stem (2) and the valve cover (3) are designed as an integral structure; a positioning buckle structure is provided between the valve cover (3) and the valve body (1); the valve cover (3) is positioned with the valve body (1) through the positioning buckle structure and can rotate relative to the valve body (1); and a plurality of sealing rings (6) are provided between the valve cover (3) and the valve body (1).

2. A gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 1, characterized in that: The valve body (1) is provided with a connecting hole (7), and the positioning buckle structure comprises an inner mounting ring groove (8) on the valve cover (3), an outer mounting ring groove (9) in the connecting hole (7), and an opening clamping ring (10) matched in the inner mounting ring groove (8) and the outer mounting ring groove (9). A push-up inclined surface (11) is provided on one side of the inner mounting ring groove (8) on the valve cover (3), and a seal is formed between the plurality of sealing rings (6) on the valve cover (3) and the connecting hole (7) of the valve body (1).

3. A gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 2, characterized in that: In a normal state without stress, the inner diameter of the open clamping ring (10) is smaller than the outer diameter of the inner mounting ring groove (8), and the outer diameter is larger than the inner diameter of the outer mounting ring groove (9).

4. The gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 2 is characterized in that: An annular assembly slope (12) is provided at the opening of the connection hole (7).

5. The gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 1 is characterized in that: The valve cover (3) is provided with a positioning boss (13) capable of abutting against the valve body (1).

6. The gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 1 is characterized in that: The end of the valve stem (2) is fixedly connected to the hand wheel (5) by a nut (14).

7. The gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 2 is characterized in that: The valve cover (3) is provided with a plurality of sealing installation grooves (15), and the sealing rings (6) are installed in the sealing installation grooves (15) to form a seal between the connecting holes (7) of the valve body (1).

8. The gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 7 is characterized in that: The valve cover (3) and the connecting hole (7) are respectively provided with corresponding mounting portions (16) and sealing portions (17); the mounting portions (16) on the valve cover (3) and the connecting hole (7) are matched to be rotated for positioning; the inner mounting ring groove (8) and the outer mounting ring groove (9) are respectively provided on the mounting portions (16) of the valve cover (3) and the connecting hole (7); and the sealing mounting groove (15) is provided on the sealing portion (17) of the valve cover (3) to form a seal with the sealing portion of the connecting hole (7).

9. A gate valve structure with reduced assembly procedures and reduced sealing leakage points according to claim 8, characterized in that: A push-off inclined surface (18) is also provided on one side of the valve cover (3) and the inner mounting ring groove (8).

Images