V-shaped ball valve for water hammer detection

Abstract

The utility model discloses a water hammer detection V-shaped ball valve, belongs to the technical field of ball valves, and solves the problem that specific detection needs to be carried out aiming at the situation that a water hammer phenomenon still occurs due to closing of a ball body in the V-shaped ball valve. Comprising a valve body, a water hammer detection circuit arranged on the valve body, a switch circuit coupled with the water hammer detection circuit and a buzzer coupled with the switch circuit, and the water hammer detection circuit is used for collecting the flow change in the valve body and collecting the vibration condition of the valve body to judge the result and control the switch circuit. The switching circuit is used for controlling the buzzer to be powered on and powered off according to the judgment result of the water hammer detection circuit. The flow sensor detects the flow of the outlet of the valve body, feeds back signals to the voltage comparison circuit, judges the flow change through delay signals, determines the water hammer phenomenon, triggers the 555 timing chip, controls the buzzer to give an alarm and reminds maintenance by combining the signals of the vibration sensor.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a V-shaped ball valve for water hammer detection. Background Art

[0002] The V-shaped ball valve is a specially designed ball valve whose core feature is a V-shaped cutout in the ball. This design allows the valve to effectively cut fibers and solid matter in the fluid during rotation, making it particularly suitable for applications involving media containing fibers, fine solid particles, slurries, and other materials. Combining the control features of a ball valve and a butterfly valve, it can function as both a control valve and a shutoff valve. The V-shaped ball valve offers a flow characteristic that approximates equal percentages, with a rangeability of up to 100:1, enabling high flow control capabilities even at small openings, improving system control accuracy and stability. Furthermore, the shearing action between the V-shaped cutout and the metal seat effectively prevents the ball from sticking and provides a self-cleaning function. This valve is widely used in a variety of industries, including the petroleum, chemical, power, metallurgy, pharmaceutical, and food processing industries, particularly in applications requiring precise flow control and handling complex media.

[0003] When the current V-type ball valve closes the flow channel in the valve body through the ball, even if a water hammer arrester is installed, water hammer may still occur due to the ball closing speed being too fast. However, relying solely on a vibration sensor to detect the vibration of the V-type ball valve at this time is not accurate. The V-type ball valve may also vibrate due to other reasons. Therefore, specific testing is required for the situation where the ball closing in the V-type ball valve still causes water hammer.

[0004] Therefore, a water hammer detection V-type ball valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a water hammer detection V-shaped ball valve.

[0006] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A water hammer detection V-type ball valve includes a valve body, a water hammer detection circuit arranged on the valve body, a switch circuit coupled to the water hammer detection circuit, and a buzzer coupled to the switch circuit. The water hammer detection circuit is used to collect flow changes in the valve body and collect vibration conditions of the valve body to determine the results and control the switch circuit. The switch circuit is used to control the power on and off of the buzzer according to the determination result of the water hammer detection circuit.

[0008] Preferably, the water hammer detection circuit includes a flow detection circuit, and the flow detection circuit includes

[0009] A flow sensor is provided on the valve body, a probe of the flow sensor is provided in the outlet end of the valve body, and the flow sensor outputs a flow signal according to the flow condition in the valve body;

[0010] a first voltage comparison circuit, wherein an input terminal of the first voltage comparison circuit is coupled to an output terminal of the flow sensor, the first voltage comparison circuit feeds back a high-level first comparison signal in response to a voltage of the flow signal being greater than a voltage of a preset flow reference signal, and feeds back a low-level first comparison signal in response to a voltage of the flow signal being less than a voltage of the preset flow reference signal;

[0011] a delay circuit, wherein an input terminal of the delay circuit is coupled to an output terminal of the first voltage comparison circuit, the delay circuit starts timing in response to a high-level first comparison signal and outputs a high-level delay signal after the timing time expires;

[0012] a trigger circuit, wherein an input terminal of the trigger circuit is coupled to an output terminal of the first voltage comparison circuit, and the trigger circuit feeds back a high-level trigger signal in response to a low-level first comparison signal;

[0013] A first AND gate circuit, wherein the input end of the first AND gate circuit is coupled to the output end of the delay circuit and the trigger circuit respectively, and the first AND gate circuit outputs a first high-level judgment signal after responding to the delay signal and the trigger signal simultaneously.

[0014] Preferably, the first voltage comparison circuit includes a minimum circuit based on a first voltage comparator LM339, the delay circuit includes an RC delay circuit, and the trigger circuit includes an RS trigger.

[0015] Preferably, the water hammer detection circuit further includes a vibration detection circuit, and the vibration detection circuit includes

[0016] A vibration sensor is provided on the valve body, wherein a detection end of the vibration sensor contacts the valve body, and the vibration sensor collects vibration conditions of the valve body and feeds back a vibration signal;

[0017] A second voltage comparison circuit, wherein the input end of the second voltage comparison circuit is coupled to the output end of the vibration sensor, and the second voltage comparison circuit outputs a high-level second comparison signal in response to the voltage of the vibration signal being greater than the voltage of a preset vibration reference signal.

[0018] Preferably, the second voltage comparison circuit comprises a minimum circuit based on a second voltage comparator LM339.

[0019] Preferably, the water hammer detection circuit further includes

[0020] a second AND gate circuit, wherein input terminals of the second AND gate circuit are respectively coupled to output terminals of the flow detection circuit and the vibration detection circuit, and the second AND gate circuit simultaneously outputs a second determination signal in response to a high-level signal;

[0021] an inverter, wherein an input terminal of the inverter is coupled to an output terminal of the second AND gate circuit, and the inverter changes the high-level second judgment signal into a low-level second judgment signal and then outputs the signal;

[0022] A timing circuit, wherein the input end of the timing circuit is coupled to the output end of the inverter, the output end of the timing circuit is coupled to the controlled end of the switch circuit, and the timing circuit starts timing in response to the second judgment signal of a low level and controls the switch circuit to power on the buzzer within the timing time.

[0023] Preferably, the timing circuit includes a minimum circuit based on a 555 time base chip, the switching circuit includes a transistor switch, the base of the transistor switch is coupled to the output end of the minimum circuit based on the 555 time base chip, the collector of the transistor switch is connected to an electrical setting, and the emitter of the transistor switch is connected to a buzzer and then grounded.

[0024] The utility model has the following beneficial effects:

[0025] This utility model uses a flow sensor to detect the flow rate at the valve outlet and feeds the signal back to a voltage comparator circuit. When closed, the flow rate decreases. A delayed signal confirms the flow change, triggering the first AND gate circuit to output a judgment signal. A vibration sensor detects valve vibration and feeds it back to the voltage comparator circuit, triggering the second AND gate circuit to detect water hammer. A timing circuit then triggers a buzzer alarm, prompting maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 It is a structural diagram of the utility model;

[0028] Figure 2 This is a structural block diagram of the water hammer detection circuit in this utility model.

[0029] 1. Valve body; 2. Flow sensor; 3. First voltage comparison circuit; 4. Delay circuit; 5. Trigger circuit; 6. First AND gate circuit; 7. Vibration sensor; 8. Second voltage comparison circuit; 9. Second AND gate circuit; 10. Inverter; 11. Timing circuit; 12. Switch circuit; 13. Buzzer. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the utility model product is usually placed when in use, or are the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] Furthermore, the terms “first,” “second,” “third,” etc., are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0035] It should also be noted that, in the description of this utility model, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0036] A water hammer detection V-type ball valve, such as Figure 1 As shown, it includes a valve body 1, a water hammer detection circuit arranged on the valve body 1, a switch circuit 12 coupled to the water hammer detection circuit, and a buzzer 13 coupled to the switch circuit 12. The water hammer detection circuit is used to collect flow changes in the valve body 1 and collect vibration conditions of the valve body 1 to judge the results and control the switch circuit 12. The switch circuit 12 is used to control the power on and off of the buzzer 13 according to the judgment result of the water hammer detection circuit.

[0037] Among them, such as Figure 2 As shown, the water hammer detection circuit includes a flow detection circuit, a vibration detection circuit, a second AND gate circuit 9, an inverter 10, and a timing circuit 11. The timing circuit 11 includes a minimum circuit based on a 555 timer chip. The switch circuit 12 includes a transistor switch. The base of the transistor switch is coupled to the output end of the minimum circuit based on the 555 timer chip. The collector of the transistor switch is connected to a power supply. The emitter of the transistor switch is connected to a buzzer 13 and then grounded.

[0038] The flow detection circuit includes a flow sensor 2, a first voltage comparison circuit 3, a delay circuit 4, a trigger circuit 5, and a first AND gate circuit 6. The first voltage comparison circuit 3 includes a minimum circuit based on the first voltage comparator LM339, the delay circuit 4 includes an RC delay circuit, and the trigger circuit 5 includes an RS trigger.

[0039] A flow sensor 2 is disposed on the valve body 1, with a probe of the flow sensor 2 disposed within the outlet of the valve body 1. The flow sensor 2 outputs a flow signal based on the flow rate within the valve body 1. An input of a first voltage comparator circuit 3 is coupled to an output of the flow sensor 2. In response to a voltage of the flow signal being greater than a predetermined flow reference signal, the first voltage comparator 3 feeds back a high-level first comparison signal, and in response to a voltage of the flow signal being less than a predetermined flow reference signal, the first voltage comparator 3 feeds back a low-level first comparison signal. An input of a delay circuit 4 is coupled to an output of the first voltage comparator 3. In response to a high-level first comparison signal, the delay circuit 4 begins timing and outputs a high-level delay signal after the timing expires. An input of a trigger circuit 5 is coupled to an output of the first voltage comparator 3. In response to a low-level first comparison signal, the trigger circuit 5 feeds back a high-level trigger signal. An input of a first AND gate circuit 6 is coupled to the output of the delay circuit 4 and the trigger circuit 5, respectively. In response to both the delay signal and the trigger signal, the first AND gate 6 outputs a high-level first determination signal.

[0040] The vibration detection circuit includes a vibration sensor 7 and a second voltage comparison circuit 8 . The second voltage comparison circuit 8 includes a minimum circuit based on a second voltage comparator LM339 .

[0041] The vibration sensor 7 is arranged on the valve body 1, and the detection end of the vibration sensor 7 is in contact with the valve body 1. The vibration sensor 7 collects the vibration of the valve body 1 and feeds back a vibration signal. The input end of the second voltage comparison circuit 8 is coupled to the output end of the vibration sensor 7. The second voltage comparison circuit 8 outputs a high-level second comparison signal in response to the voltage of the vibration signal being greater than the voltage of a preset vibration reference signal.

[0042] The input end of the second AND gate circuit 9 is coupled to the output end of the flow detection circuit and the vibration detection circuit respectively. The second AND gate circuit 9 outputs the second judgment signal in response to the high-level signal. The input end of the inverter 10 is coupled to the output end of the second AND gate circuit 9. The inverter 10 changes the high-level second judgment signal into a low-level second judgment signal and outputs it. The input end of the timing circuit 11 is coupled to the output end of the inverter 10. The output end of the timing circuit 11 is coupled to the controlled end of the switch circuit 12. The timing circuit 11 starts timing in response to the low-level second judgment signal and controls the switch circuit 12 to power on the buzzer 13 within the timing time.

[0043] When the present invention is actually working, the flow sensor 2 detects the flow conditions therein through a probe set in the outlet end of the valve body 1, and feeds back the flow signal to the first voltage comparison circuit 3. At this time, the first voltage comparison circuit 3 feeds back a high-level first comparison signal in response to the voltage of the flow signal being greater than the voltage of the preset flow reference signal, and feeds back a low-level first comparison signal in response to the voltage of the flow signal being less than the voltage of the preset flow reference signal. Since the flow rate of the V-type ball valve gradually decreases from a stable flow state when it is closed, the delay signal can prove the previous stable flow state, and the reduced flow rate is used to prove that the flow rate is reduced or even closed. In this way, the two high-level delay signals and trigger signals output at the same time can trigger the first AND gate circuit 6, and then output a high-level first judgment signal to the second AND gate circuit 9. At this time, it indicates that the V-type ball valve has achieved the flow blocking action, and the vibration sensor 7 collects the vibration of the valve body 1. The vibration signal is fed back to the second voltage comparison circuit 8. In response to the vibration signal voltage being greater than the preset vibration reference signal voltage, the second voltage comparison circuit 8 outputs a high-level second comparison signal. The second comparison signal is sent to the second AND gate circuit 9, indicating that the V-type ball valve is clearly vibrating. Since both the vibration and valve closure requirements are met, it can be basically determined that water hammer has occurred. Therefore, the second AND gate circuit 9 can output a high-level second judgment signal. Under the action of the inverter 10, the high-level second judgment signal is converted to a low-level second judgment signal to trigger the timing circuit 11, which is actually a 555 timer chip. The timing circuit 11 starts timing and sends a timing signal to the base of the transistor switch within the timing time. This also turns on the switch circuit 12, allowing the buzzer 13 to be energized and start working. After the alarm sounds for a period of time, the timing time ends and the buzzer 13 stops working and no longer alarms. The alarm behavior can remind equipment operation and maintenance personnel to perform maintenance.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A water hammer detection V-type ball valve, characterized in that: The invention comprises a valve body (1), a water hammer detection circuit arranged on the valve body (1), a switch circuit (12) coupled to the water hammer detection circuit, and a buzzer (13) coupled to the switch circuit (12); the water hammer detection circuit is used to collect flow changes in the valve body (1) and collect vibration conditions of the valve body (1) to determine the results and control the switch circuit (12); the switch circuit (12) is used to control the buzzer (13) to be powered on or off according to the determination result of the water hammer detection circuit.

2. A water hammer detection V-type ball valve according to claim 1, characterized in that: The water hammer detection circuit includes a flow detection circuit, and the flow detection circuit includes A flow sensor (2), the flow sensor (2) being arranged on the valve body (1), a probe of the flow sensor (2) being arranged in the outlet end of the valve body (1), and the flow sensor (2) outputting a flow signal according to the flow condition in the valve body (1); a first voltage comparison circuit (3), wherein an input end of the first voltage comparison circuit (3) is coupled to an output end of the flow sensor (2), and the first voltage comparison circuit (3) feeds back a high-level first comparison signal in response to a voltage of the flow signal being greater than a voltage of a preset flow reference signal, and feeds back a low-level first comparison signal in response to a voltage of the flow signal being less than a voltage of the preset flow reference signal; A delay circuit (4), wherein an input end of the delay circuit (4) is coupled to an output end of the first voltage comparison circuit (3), and the delay circuit (4) starts timing in response to a high-level first comparison signal and outputs a high-level delay signal after the timing time ends; a trigger circuit (5), wherein an input terminal of the trigger circuit (5) is coupled to an output terminal of the first voltage comparison circuit (3), and the trigger circuit (5) feeds back a high-level trigger signal in response to a low-level first comparison signal; A first AND gate circuit (6), wherein the input end of the first AND gate circuit (6) is coupled to the output end of the delay circuit (4) and the trigger circuit (5) respectively, and the first AND gate circuit (6) outputs a first high-level judgment signal after simultaneously responding to the delay signal and the trigger signal.

3. A water hammer detection V-type ball valve according to claim 2, characterized in that: The first voltage comparison circuit (3) includes a minimum circuit based on a first voltage comparator LM339, the delay circuit (4) includes an RC delay circuit, and the trigger circuit (5) includes an RS trigger.

4. A water hammer detection V-type ball valve according to claim 1, characterized in that: The water hammer detection circuit also includes a vibration detection circuit, and the vibration detection circuit includes A vibration sensor (7), the vibration sensor (7) being arranged on the valve body (1), and a detection end of the vibration sensor (7) being in contact with the valve body (1), the vibration sensor (7) collecting vibration conditions of the valve body (1) and feeding back a vibration signal; A second voltage comparison circuit (8) is provided, wherein an input end of the second voltage comparison circuit (8) is coupled to an output end of the vibration sensor (7), and the second voltage comparison circuit (8) outputs a high-level second comparison signal in response to the voltage of the vibration signal being greater than the voltage of a preset vibration reference signal.

5. A water hammer detection V-type ball valve according to claim 4, characterized in that: The second voltage comparison circuit (8) comprises a minimum circuit based on a second voltage comparator LM339.

6. A water hammer detection V-type ball valve according to claim 1, characterized in that: The water hammer detection circuit also includes a second AND gate circuit (9), wherein the input end of the second AND gate circuit (9) is coupled to the output end of the flow detection circuit and the output end of the vibration detection circuit respectively, and the second AND gate circuit (9) outputs a second judgment signal in response to a high-level signal; an inverter (10), wherein an input end of the inverter (10) is coupled to an output end of the second AND gate circuit (9), and the inverter (10) changes the high-level second judgment signal into a low-level second judgment signal and then outputs the signal; A timing circuit (11) is provided, wherein the input end of the timing circuit (11) is coupled to the output end of the inverter (10), the output end of the timing circuit (11) is coupled to the controlled end of the switch circuit (12), and the timing circuit (11) starts timing in response to a low-level second judgment signal and controls the switch circuit (12) to energize the buzzer (13) within the timing time.

7. A water hammer detection V-type ball valve according to claim 6, characterized in that: The timing circuit (11) includes a minimum circuit based on a 555 time base chip, and the switch circuit (12) includes a transistor switch, the base of the transistor switch is coupled to the output end of the minimum circuit based on the 555 time base chip, the collector of the transistor switch is connected to an electrical setting, and the emitter of the transistor switch is connected to a buzzer (13) and then grounded.

Images