Check valve and three-piece vertical check assembly including the check valve

Abstract

The utility model discloses a check valve and a three-piece vertical check assembly including the check valve, wherein the check valve includes a valve body and a limit plate; the outer edge of the limit plate is integrally formed with a limit plate movably placed in the corresponding limit groove along the circumferential direction; a bendable anti-positive rotation limit strip is connected on one side of one of the limit plates, and an anti-reverse rotation limit strip is connected on the opposite side of the other limit plates; the three-piece vertical check assembly includes a first connecting pipe, a second connecting pipe and a check valve. Advantages: when the inside of the check valve needs to be disassembled, it is only necessary to pry the anti-reverse rotation limit strip straight so that it corresponds to the limit groove and can pass through the limit groove. At this time, the limit plate can be rotated in one direction to make each limit plate disengage from the corresponding limit groove, and then the limit plate, spring and valve disc can be taken out of the valve body for easy replacement.

Description

Technical field:

[0001] The utility model relates to the technical field of valve equipment, in particular to a check valve and a three-piece vertical check assembly comprising the check valve. Background technology:

[0002] A check valve is a valve whose opening and closing part is a circular valve disc and which relies on its own weight and medium pressure to produce movement to block the backflow of the medium; the function of a check valve is to allow the medium to flow in one direction only and prevent it from flowing in the opposite direction.

[0003] Check valves can be divided into three types according to their structure: lift check valves, swing check valves and butterfly check valves. The valve disc of the lift check valve slides along the vertical center line of the valve body. When the medium flows downstream, the valve disc opens due to the thrust of the medium. When the medium stops flowing, the valve disc falls on the valve body to prevent the medium from flowing back.

[0004] The valve body structure of the existing check valve usually consists of more than two components. When disassembling the internal valve disc and other components, the valve body needs to be disassembled first, which is cumbersome. In addition, the installation structure of the existing lift check valve is usually a flange connection, which cannot meet the needs of other connection methods in various usage occasions and has poor adaptability. Utility model content:

[0005] The utility model aims to provide a check valve which is reliable in operation, convenient in assembly and disassembly and suitable for various installation and connection modes, and a three-piece vertical check valve assembly including the check valve.

[0006] The utility model is implemented by the following technical scheme: a check valve, which includes a valve body, and a valve disc, a spring and a limit disc arranged in sequence in the valve body; a limit protrusion is integrally formed with the inner wall of one end of the valve body along the circumferential direction, the outer edge of the valve disc is slidably arranged along the inner wall of the valve body, a sealing rubber ring is embedded and fixed on the top surface of the limit protrusion, and one side end surface of the valve disc is in active contact with the sealing rubber ring; a step hole is provided at the other end of the valve body, and more than two limit blocks are evenly fixed on the inner wall of the step hole along the circumferential direction, and each of the limit blocks is in contact with the bottom of the step hole A limit groove is formed between the valve disc and the limit plate, and a limit clamping plate movably placed in the corresponding limit groove is integrally formed on the outer edge of the limit plate along the circumferential direction; the two ends of the spring are respectively abutted against the valve disc and the limit plate, and a medium flow hole is opened in the middle of the limit plate; a bendable anti-positive rotation limit strip is connected to one side of one of the limit clamping plates, and an anti-reverse rotation limit strip is connected to the other side of the same limit clamping plate or the opposite side of the other limit clamping plates; the anti-positive rotation limit strip and the anti-reverse rotation limit strip are bent upwards and clamped on the side wall of the corresponding limit block.

[0007] Furthermore, the valve body is a cylindrical structure with openings at both ends.

[0008] Furthermore, the anti-reverse limit strip and / or the anti-forward limit strip is made of a metal material integrally formed with the limit clamping plate.

[0009] A three-piece vertical check assembly comprises a first connecting pipe, a second connecting pipe, and a check valve; the outer wall of one end of the first connecting pipe and the outer wall of one end of the second connecting pipe are both integrally formed with a flange, the flange end face of the first connecting pipe is fitted with one end of the valve body, the flange end face of the second connecting pipe is fitted with the other end of the valve body, and the first connecting pipe is connected to the second connecting pipe by means of bolts.

[0010] Furthermore, one or more positioning seats are fixed on the outer wall of the valve body, and the positioning seats are provided with arc-shaped positioning openings matching the outer wall of the bolt.

[0011] Furthermore, sealing rings are embedded on two end surfaces of the valve body, and the sealing rings are respectively in contact with the corresponding flange end surfaces on the first connecting pipe and the flange end surfaces on the second connecting pipe.

[0012] The advantages of the utility model are as follows: during use, the valve disc is subjected to force to open and close repeatedly, and the limit disc is also subjected to repeated force under the action of the spring. In order to prevent the limit disc from rotating under force and escaping from the limit groove, an anti-positive rotation limit strip is provided to limit the limit disc in the forward direction, and the anti-reverse rotation limit strip can limit the limit disc in the reverse direction, thereby ensuring the reliability of the normal operation of the check valve.

[0013] When it is necessary to disassemble the inside of the check valve, it is only necessary to pry the anti-reverse limit strip straight so that it corresponds to the limit groove and can pass through the limit groove. At this time, rotating the limit plate in one direction can make each limit clamping plate disengage from the corresponding limit groove, and then the limit plate, spring and valve disc plate can be taken out of the valve body for easy replacement.

[0014] The first connecting pipe and the second connecting pipe of different connection forms can be easily replaced by bolts. According to the actual situation on site, the connection forms include butt welding connection, clamp connection, flange connection, etc. Description of the drawings:

[0015] Figure 1 It is a structural schematic diagram of the check valve of the utility model.

[0016] Figure 2 for Figure 1 AA section view.

[0017] Figure 3 It is a schematic diagram of the structure of the limit plate, the limit clamping plate, and the anti-forward limit strip and the anti-reverse limit strip when they are in a horizontal state.

[0018] Figure 4 It is a schematic diagram of the structure of a three-piece vertical check assembly.

[0019] The components in the accompanying drawings are marked as follows: valve body 1, valve disc 2, spring 3, limit disc 4, limit protrusion 5, step hole 6, limit block 7, limit groove 8, limit clamping plate 9, medium flow hole 10, anti-forward rotation limit strip 11, anti-reverse rotation limit strip 12, first connecting pipe 13, second connecting pipe 14, flange 15, bolt 16, positioning seat 17, arc-shaped positioning port 18, sealing ring 19, sealing rubber ring 20. Specific implementation method:

[0020] 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.

[0021] In the description of the present invention, it should be noted that the terms "center", "up", "down", "front", "back", "top", "bottom", "left", "right", "vertical", "horizontal", "inside" and "outside" etc. indicating directions or positional relationships are 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, and do not indicate or imply 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 a limitation on the present invention.

[0022] Example 1: Figures 1 to 3 As shown, the present embodiment provides a check valve, which includes a valve body 1, and a valve flap disc 2, a spring 3 and a limit disc 4 which are sequentially placed in the valve body 1; the valve body 1 is a cylindrical structure with openings at both ends, and the two ends of the valve body 1 are butt-jointed with an industrial medium delivery pipeline; the outer edge of the valve flap disc 2 is in sliding contact with the inner wall of the valve body 1, which can ensure the stability of the operation of the valve flap disc 2, and the outer edge of the valve flap disc 2 is in clearance with the inner wall of the valve body 1, so that the medium can flow through the gap; a full circle of limit protrusions 5 are integrally formed on the inner wall of one end of the valve body 1 along the circumferential direction, and a sealing rubber ring 20 is embedded and fixed on the top surface of the limit protrusion 5, and one side end surface of the valve flap disc 2 is in active contact with the sealing rubber ring 20 to play a sealing role.

[0023] A step hole 6 is provided at the other end of the valve body 1, and the center line of the step hole 6 coincides with the center line of the valve body 1. Four limit blocks 7 are evenly distributed and fixed on the inner wall of the step hole 6 along the circumferential direction, and a limit groove 8 is formed between each limit block 7 and the bottom of the step hole 6. The outer edge of the limit plate 4 is integrally formed with four limit clamping plates 9 movably placed in the corresponding limit grooves 8 along the circumferential direction; the two ends of the spring 3 are respectively abutted on the valve disc 2 and the limit plate 4, and a medium flow hole 10 is opened in the middle of the limit plate 4; under the action of the spring 3, the four limit clamping plates 9 on the limit plate 4 placed in the limit grooves 8 abut against the bottom surfaces of the corresponding limit blocks 7, thereby effectively limiting the limit plate 4.

[0024] At the same time, the valve disc 2 abuts against the sealing rubber ring 20 of the limiting protrusion 5, and under the sealing effect between the sealing rubber ring 20 and the valve disc 2, it plays a role in intercepting the medium in the pipeline; when the pressure of the medium is greater than the pressure of the spring 3, the medium acts on the valve disc 2, causing the valve disc 2 to compress the spring 3. After the valve disc 2 is separated from the sealing rubber ring 20, the medium can enter the valve body 1 along the gap between the valve disc 2 and the inner wall of the valve body 1, and pass through the medium flow hole 10 to achieve the circulation of the medium; when the pressure of the medium acting positively on the front of the valve disc 2 is less than the elastic force of the spring 3, or the medium acts reversely on the back of the valve disc 2, the valve disc 2 always remains closed to play a role in intercepting the flow. Only when the medium acts positively on the front of the valve disc 2 and is greater than the elastic force of the spring 3, can the valve disc 2 compress the spring 3 to achieve the circulation of the medium, thereby ensuring the unidirectional flow of the medium.

[0025] A bendable anti-forward rotation limit strip 11 is connected to one side of one of the limit clamps 9, and an anti-reverse rotation limit strip 12 is connected to the other limit clamp 9 on the opposite side of the limit clamp 9 where the anti-forward rotation limit strip 11 is fixed; the anti-forward rotation limit strip 11 and the anti-reverse rotation limit strip 12 are bent upward and clamped on the side walls of the corresponding limit blocks 7; in this embodiment, the anti-reverse rotation limit strip 12 and the anti-forward rotation limit strip 11 are both made of metal materials integrally formed with the limit clamp 9, have certain strength and toughness, and can bend under force, such as iron metal or copper metal. When the anti-reverse rotation limit strip 12 is bent upward by applying external force, it is clamped on the corresponding limit block 7 to play a limiting role; and the anti-reverse rotation limit strip 12 is pried straight to make it in a horizontal state, so that it is easy to pass through the limit slot 8 to achieve unlocking and limiting.

[0026] During use of this embodiment, the valve flap disc 2 is subjected to force to open and close repeatedly. Under the action of the spring 3, the limit plate 4 is also subjected to repeated force. In order to prevent the limit plate 4 from rotating due to the force and escaping from the limit groove 8, an anti-positive rotation limit strip 11 is provided to limit the limit plate 4 in the forward rotation, and an anti-reverse rotation limit strip 12 can limit the limit plate 4 in the reverse rotation, thereby ensuring the reliability of the normal operation of the check valve; when it is necessary to disassemble the inside of the check valve, it is only necessary to pry the anti-positive rotation limit strip 11 and / or the anti-reverse rotation limit strip 12 straight to make it in a horizontal state to facilitate passing through the limit groove 8. At this time, rotating the limit plate 4 in one direction can make each limit clamping plate 9 escaping from the corresponding limit groove 8, and then the limit plate 4, spring 3 and valve flap disc 2 can be taken out of the valve body 1 for easy replacement.

[0027] Example 2: Figure 4 As shown, the present embodiment provides a three-piece vertical check assembly, which includes a coaxially arranged first connecting pipe 13, a second connecting pipe 14, and the check valve of Example 1; the outer wall of one end of the first connecting pipe 13 and the outer wall of one end of the second connecting pipe 14 are both integrally formed with a flange 15, the end face of the flange 15 of the first connecting pipe 13 is fitted with one end of the valve body 1, and the end face of the flange 15 of the second connecting pipe 14 is fitted with the other end of the valve body 1, and the first connecting pipe 13 is connected to the second connecting pipe 14 by passing bolts 16; the bolts 16 are used to facilitate replacement of the first connecting pipe 13 and the second connecting pipe 14 in different connection forms, and according to the actual situation on site, the connection forms include butt welding connection, clamp connection, flange connection, etc.

[0028] Four positioning seats 17 are fixed on the outer wall of the valve body 1, and an arc-shaped positioning opening 18 matching the outer wall of the corresponding bolt 16 is opened on the positioning seat 17. The outer wall of the valve body 1 is usually marked with information such as the use pressure and the arrow of the medium direction. When the first connecting pipe 13, the check valve and the second connecting pipe 14 are connected by the bolt 16, the arc-shaped positioning opening 18 is clamped on the corresponding side wall of the bolt 16 to limit the position of the check valve, ensuring that the staff can correctly install the check assembly on the medium pipeline, so that the mark on the valve body 1 faces outward and the arrow on the valve body 1 points to the flow direction of the medium.

[0029] Sealing rings 19 are embedded on the two end surfaces of the valve body 1 of the check valve, which respectively abut against the corresponding flange 15 on the first connecting pipe 13 and the flange 15 on the second connecting pipe 14 to play an effective sealing role and prevent medium leakage.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Check valve, characterized in that, It includes a valve body, and a valve disc, a spring and a limit disc which are sequentially placed in the valve body; A full circle of limiting protrusions is integrally formed on the inner wall of one end of the valve body along the circumferential direction, the outer edge of the valve disc is slidably arranged along the inner wall of the valve body, a sealing rubber ring is embedded and fixed on the top surface of the limiting protrusion, and one side end surface of the valve disc is in active contact with the sealing rubber ring; The other end of the valve body is provided with a step hole, and at least two limit blocks are evenly fixed on the inner wall of the step hole along the circumferential direction, and a limit groove is formed between each limit block and the bottom of the step hole, and the outer edge of the limit plate is integrally formed with a limit clamping plate movably placed in the corresponding limit groove along the circumferential direction; The two ends of the spring are respectively in contact with the valve disc and the limit disc, and a medium flow hole is provided in the middle of the limit disc; A bendable anti-forward rotation limit strip is connected to one side of one of the limit clamps, and an anti-reverse rotation limit strip is connected to the other side of the same limit clamp or the opposite side of the other limit clamps; the anti-forward rotation limit strip and the anti-reverse rotation limit strip are bent upward and clamped on the side wall of the corresponding limit block.

2. The check valve according to claim 1, characterized in that: The valve body is a cylindrical structure with openings at both ends.

3. The check valve according to claim 1, characterized in that: The anti-reverse limit strip and / or the anti-forward limit strip are made of a metal material integrally formed with the limit clamping plate.

4. Three-piece vertical check assembly, characterized in that: It includes a first connecting pipe, a second connecting pipe, and a check valve as described in any one of claims 1 to 3; the outer wall of one end of the first connecting pipe and the outer wall of one end of the second connecting pipe are both integrally formed with a flange, the flange end face of the first connecting pipe is fitted with one end of the valve body, the flange end face of the second connecting pipe is fitted with the other end of the valve body, and the first connecting pipe is connected to the second connecting pipe by passing bolts.

5. The three-piece vertical check assembly according to claim 4, characterized in that: One or more positioning seats are fixed on the outer wall of the valve body, and the positioning seats are provided with arc-shaped positioning openings matching the outer wall of the bolt.

6. The three-piece vertical check assembly according to claim 4, characterized in that: Sealing rings are embedded on two end surfaces of the valve body, and the sealing rings are respectively in contact with the corresponding flange end surfaces on the first connecting pipe and the flange end surfaces on the second connecting pipe.

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