Check valve capable of monitoring flow on line

Abstract

The utility model discloses a check valve capable of monitoring flow on line, which belongs to the field of check valves and comprises a valve body, an inlet flow passage is arranged at one end of the valve body, an outlet flow passage is arranged at the other end of the valve body, connecting flanges are arranged on the outer sides of two ends of the valve body, a buffer cavity is arranged on the upper portion inside the valve body, and the buffer cavity is communicated with the inlet flow passage. One side of the buffer cavity is communicated with the inlet flow channel, a communication hole is formed between the bottom of the buffer cavity and the inlet flow channel, a sealing plate is installed at the top of the buffer cavity through a bolt, the sealing plate seals the top of the buffer cavity, a control rod is vertically and slidably installed in the center of the sealing plate, and a threaded surface is formed in the bottom of the control rod; the valve plate is normally closed under the influence of the dead weight and the spring, the extrusion force of the valve plate and the control rod on the spring is adjusted by controlling the relative rotation of the valve plate and the control rod, then the force of the spring acting on the valve plate when the valve plate is closed is adjusted, the pressure needed when the valve plate is opened is controlled, and the practicability of the check valve is improved.

Description

Technical Field

[0001] The utility model relates to the field of check valves, and more particularly to a check valve capable of online monitoring flow. Background Art

[0002] A check valve, also known as a one-way valve or non-return valve, is an automatic valve that usually opens and closes its disc automatically based on the flow of the medium itself. When the medium flows in the specified direction, the disc opens under the action of fluid pressure, its own gravity, etc., allowing the medium to pass smoothly; when the medium flows in reverse, the disc quickly closes under the action of reverse pressure, thereby preventing the medium from flowing back. Common check valves include lift check valves and butterfly check valves. Among them, a lift check valve refers to a valve disc that moves along the vertical center line of the valve body. This type of check valve has a relatively simple structure and good sealing performance. In order to increase the sensitivity of the valve disc, a spring is installed inside. It can only open when the fluid pressure is greater than the weight of the valve disc and the spring force. However, this structure makes it impossible to adjust the opening pressure and cannot cope with different working environments. In addition, existing check valves cannot monitor the flow rate. Utility Model Content

[0003] 1. Technical problems to be solved

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a check valve with online flow monitoring, which can adjust the opening pressure of the valve plate to improve the practicality of the check valve.

[0005] 2. Technical solution

[0006] In order to solve the above problems, the present invention adopts the following technical solutions.

[0007] A check valve for online flow monitoring includes a valve body, an inlet flow channel is provided at one end of the valve body, and an outlet flow channel is provided at the other end of the valve body, connecting flanges are provided on the outer sides of both ends of the valve body, a buffer chamber is provided on the upper part of the valve body, one side of the buffer chamber is connected with the inlet flow channel, a connecting hole is provided between the bottom of the buffer chamber and the inlet flow channel, a sealing plate is installed on the top of the buffer chamber by bolts, the sealing plate seals the top of the buffer chamber, a control rod is vertically slidably installed at the center of the sealing plate, a threaded surface is provided at the bottom of the control rod, a valve plate is vertically slidably installed inside the buffer chamber, the valve plate is placed above the connecting hole, the diameter of the valve plate is larger than the connecting hole, an internal threaded barrel is provided on the upper surface of the valve plate, the top of the internal threaded barrel is open, and the bottom of the control rod is screwed into the inside of the internal threaded barrel.

[0008] Furthermore, a limit plate is provided on the surface of the control rod, and the limit plate is placed inside the buffer cavity and on the valve plate. A spring is sleeved on the surface of the control rod, and the top of the spring contacts the lower surface of the sealing plate, and the bottom of the spring contacts the upper surface of the limit plate.

[0009] Furthermore, a rotating handwheel is provided on the top of the control rod, and the rotating handwheel is placed outside the sealing plate.

[0010] Furthermore, a sliding rod is vertically passed through the inner center of the control rod, a knob is provided on the top of the sliding rod, the knob is placed above the rotating handwheel, and a square head is provided at the bottom of the sliding rod.

[0011] Furthermore, a docking square hole is opened at the center of the inner wall of the internal threaded barrel, and the square head is adapted to the inner size of the docking square hole.

[0012] Furthermore, a mounting frame is provided on one side of the inlet flow channel, a flow monitor is installed inside the mounting frame, and a measuring head of the flow monitor is placed inside the inlet flow channel.

[0013] 3. Beneficial effects

[0014] Compared with the existing technology, the advantages of the present invention are: the present invention provides a check valve for online flow monitoring, the valve plate is normally closed under the influence of its own weight and the spring, and the relative rotation of the valve plate and the control rod is controlled to adjust the squeezing force on the spring, and then the force of the spring acting on the valve plate when the valve plate is closed is adjusted to control the pressure required for opening the valve plate, thereby improving the practicality of the check valve.

[0015] In addition, a flow monitor is installed at the inlet and is wirelessly controlled to monitor the flow of the check valve and facilitate control of the entire pipeline system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the check valve of the present utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the present utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the valve body of the present utility model;

[0019] Figure 4 This is a schematic diagram of the control rod and valve plate installation structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the control rod and valve plate of the utility model.

[0021] Explanation of the numbers in the figure: 1. Valve body; 11. Inlet flow channel; 12. Outlet flow channel; 13. Connecting flange; 14. Buffer chamber; 15. Sealing plate; 16. Connecting hole; 17. Mounting frame; 2. Flow monitor; 3. Control lever; 31. Rotating handwheel; 32. Limit plate; 4. Valve plate; 41. Internal threaded barrel; 42. Docking square hole; 5. Spring; 6. Sliding rod; 61. Square head; 62. Knob. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] Example:

[0024] See also Figure 1-Figure 5 As shown, a check valve for online flow monitoring includes a valve body 1, an inlet flow channel 11 is opened at one end of the valve body 1, and an outlet flow channel 12 is opened at the other end of the valve body 1, and connecting flanges 13 are provided on the outside of both ends of the valve body 1 to facilitate connecting the valve body 1 to a pipeline so that the fluid inside the pipeline can flow through the valve body 1, a buffer chamber 14 is opened on the upper part of the valve body 1, one side of the buffer chamber 14 is connected to the inlet flow channel 11, a connecting hole 16 is opened between the bottom of the buffer chamber 14 and the inlet flow channel 11, and a sealing plate 15 is installed on the top of the buffer chamber 14 by bolts, and the sealing plate 15 seals the top of the buffer chamber 14. So that the fluid entering the valve body 1 can only flow out through the outlet flow channel 12, a control rod 3 is installed vertically and slidingly at the center of the sealing plate 15, and a threaded surface is provided at the bottom of the control rod 3. A valve plate 4 is installed vertically and slidingly inside the buffer chamber 14, and the valve plate 4 is placed above the communicating hole 16. The diameter of the valve plate 4 is larger than the communicating hole 16. The lower valve plate 4 moves downward to seal the communicating hole 16. An internal threaded barrel 41 is provided on the upper surface of the valve plate 4, and the top of the internal threaded barrel 41 is open. The bottom of the control rod 3 is screwed into the internal threaded barrel 41, and then the relative height of the valve plate 4 and the control rod 3 can be adjusted by rotating the two relative to each other.

[0025] Please refer to Figure 3-Figure 5As shown, a limit plate 32 is fixedly provided on the surface of the control rod 3, and the limit plate 32 is placed inside the buffer chamber 14 and on the valve plate 4. A spring 5 is sleeved on the surface of the control rod 3, and the top of the spring 5 contacts the lower surface of the sealing plate 15, and the bottom of the spring 5 contacts the upper surface of the limit plate 32. The spring 5 always has a downward force on the limit plate 32, so that the valve plate 4 at the bottom can seal the connecting hole 16 when it is not subject to force. At this time, the valve body 1 is in a closed state. To open the valve body 1, the pressure inside the inlet flow channel 11 must be able to overcome the gravity of the valve plate 4 and the elastic force of the spring 5 to push the valve plate 4 up.

[0026] A rotating hand wheel 31 is provided on the top of the control rod 3 , and the rotating hand wheel 31 is placed outside the sealing plate 15 so that the control rod 3 can be operated from the outside.

[0027] Please refer to Figure 5 As shown, a slide rod 6 is vertically passed through the inner center of the control rod 3, and a knob 62 is provided on the top of the slide rod 6. The knob 62 is placed above the rotating handwheel 31, and the slide rod 6 and the control rod 3 can slide and rotate relative to each other. A square head 61 is provided at the bottom of the slide rod 6, and a docking square hole 42 is provided at the center of the inner wall of the internal threaded cylinder 41. The square head 61 is adapted to the internal size of the docking square hole 42 to control the rotation of the valve plate 4 by rotating the knob 62, and then adjust the distance between the valve plate 4 and the limit plate 32 to adjust the length of the spring 5 when the valve plate 4 is closed. When the distance of the spring 5 increases when closed, the force required to push the valve plate 4 upward is reduced, and conversely, a larger pressure is required to push the valve plate 4 to open.

[0028] Please refer to Figure 1 As shown, a mounting frame 17 is provided on one side of the inlet flow channel 11. A flow monitor 2 is mounted inside the mounting frame 17. The measuring head of flow monitor 2 is placed inside the inlet flow channel 11. Flow monitor 2 is an electromagnetic flowmeter. According to Faraday's law of electromagnetic induction, when a conductive liquid flows perpendicular to the magnetic field lines in a magnetic field, an induced electromotive force is generated in the liquid. This electromotive force is proportional to the average flow velocity of the liquid. By measuring the magnitude of the induced electromotive force, the flow rate in the pipeline can be calculated.

[0029] Working principle: The check valve is installed on the fluid pipeline through the connecting flanges 13 on both sides, so that when the valve is opened, the fluid flows into the outlet flow channel 12 through the inlet flow channel 11 and the connecting hole 16 in sequence. Due to the presence of the spring 5, the limit plate 32 has a downward force, so that when there is no force, the control rod 3 can be used to adjust the valve plate 4 to move downward, so that the connecting hole 16 is sealed through the valve plate 4 to achieve closure. When water flows in, the spring 5 has an upward thrust, which makes the spring 5 squeezed, so that the valve plate 4 and the control rod 3 move upward synchronously. At this time, the fluid passes through, otherwise the fluid cannot move in the opposite direction. Due to the square head 61 and the docking The square hole 42 cooperates with the knob 62 to control the rotation of the valve plate 4. The control rod 3 and the internal threaded cylinder 41 can be rotated relative to each other by fixing and rotating one of the hand wheel 31 and the knob 62, and then rotating the other, so as to adjust the distance between the valve plate 4 and the limit plate 32. When the distance between the two increases, the distance between the limit plate 32 and the communicating hole 16 increases when the valve is closed. At this time, the length of the spring 5 becomes shorter to increase the elastic force, and a greater pressure is required to open the valve plate 4. On the contrary, when the distance between the valve plate 4 and the limit plate 32 decreases, the position of the limit plate 32 is lower after the valve is closed. At this time, the pressure when the length of the spring 5 increases and the valve plate 4 is opened becomes smaller.

[0030] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed in the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A check valve for online flow monitoring, comprising a valve body (1), characterized in that: The valve body (1) is provided with an inlet flow channel (11) at one end and an outlet flow channel (12) at the other end. Connecting flanges (13) are provided on the outer sides of both ends of the valve body (1). A buffer cavity (14) is provided on the upper part of the valve body (1). One side of the buffer cavity (14) is communicated with the inlet flow channel (11). A communicating hole (16) is provided between the bottom of the buffer cavity (14) and the inlet flow channel (11). A sealing plate (15) is installed on the top of the buffer cavity (14) by bolts. The sealing plate (15) is provided on the upper part of the valve body (1). ) seals the top of the buffer chamber (14), a control rod (3) is vertically slidably installed at the center of the sealing plate (15), a threaded surface is provided at the bottom of the control rod (3), a valve plate (4) is vertically slidably installed inside the buffer chamber (14), the valve plate (4) is placed above the connecting hole (16), the diameter of the valve plate (4) is larger than the connecting hole (16), an internal threaded barrel (41) is provided on the upper surface of the valve plate (4), the top of the internal threaded barrel (41) is open, and the bottom of the control rod (3) is screwed into the inside of the internal threaded barrel (41).

2. The check valve for online flow monitoring according to claim 1, characterized in that: A limit plate (32) is provided on the surface of the control rod (3), and the limit plate (32) is placed inside the buffer cavity (14) and on the valve plate (4). A spring (5) is sleeved on the surface of the control rod (3), and the top of the spring (5) contacts the lower surface of the sealing plate (15), and the bottom of the spring (5) contacts the upper surface of the limit plate (32).

3. The check valve for online flow monitoring according to claim 2, characterized in that: A rotating hand wheel (31) is provided on the top of the control rod (3), and the rotating hand wheel (31) is placed outside the sealing plate (15).

4. The check valve for online flow monitoring according to claim 3, characterized in that: A slide bar (6) is vertically passed through the center of the control rod (3); a knob (62) is provided on the top of the slide bar (6); the knob (62) is placed above the rotating hand wheel (31); and a square head (61) is provided on the bottom of the slide bar (6).

5. The check valve for online flow monitoring according to claim 4, characterized in that: A docking square hole (42) is provided at the center of the inner wall of the internal threaded barrel (41), and the square head (61) is adapted to the inner size of the docking square hole (42).

6. The check valve for online flow monitoring according to claim 1, characterized in that: A mounting frame (17) is provided on one side of the inlet flow channel (11), a flow monitor (2) is installed inside the mounting frame (17), and a measuring head of the flow monitor (2) is placed inside the inlet flow channel (11).

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