Flow valve for testing and control method thereof

Abstract

The invention relates to the technical field of flow valves, and provides a flow valve for testing and a control method thereof.The flow valve for testing comprises a power mechanism, a supporting mechanism and a barrel mechanism, and is characterized in that the supporting mechanism comprises a supporting frame, the power mechanism is installed at one end of the supporting frame, and the power mechanism comprises a power mechanism body; the power mechanism is provided with a connecting rod, one end of the connecting rod penetrates through the top of the supporting frame and is arranged in an inner cavity of the supporting frame, a piston rod is arranged at the end, arranged in the inner cavity of the supporting frame, of the connecting rod, the barrel mechanism comprises a barrel, and the barrel is provided with a third through groove used for containing the piston rod. The position of the piston rod can be adjusted through a power source, and due to the fact that one corner of the conical groove perpendicularly points to the bottom of the cylinder body, when the piston rod just starts to ascend, only a very small part of liquid can pass through the conical groove, and therefore fine control over the initial flow can be achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of flow valves, and in particular to a flow valve for testing and a control method thereof. Background Art

[0002] Flow control is crucial in many industrial applications, especially in the fields of chemical, pharmaceutical, food processing and water treatment. Traditional flow valves usually use simple mechanical structures to control the flow of fluids, such as manually or electrically driven pistons, gates or butterfly valves to adjust the passage of fluids. However, these traditional flow valves have some significant problems in actual use, especially in the flow control at the initial opening stage.

[0003] Traditional flow valves have low accuracy when controlling low flow rates, especially when fine adjustment is required. This is mainly due to the limitation of the mechanical structure, which limits the adjustment range of the valve at a small opening and makes it impossible to achieve high-precision flow control.

[0004] The purpose of the present invention is to solve the problem that the fluid flow rate of a traditional flow valve is too large and cannot be accurately controlled at the initial opening stage. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the fluid flow rate of the traditional flow valve is too large and cannot be accurately controlled at the initial opening. The present invention adopts the following technical solutions:

[0006] A flow valve for testing, comprising a power mechanism, a support mechanism, and a cylinder mechanism, wherein the support mechanism comprises a support frame, and the power mechanism is mounted at one end of the support frame;

[0007] The power mechanism comprises a power mechanism, the power mechanism is equipped with a connecting rod, one end of the connecting rod passes through the top of the support frame and is arranged in the inner cavity of the support frame, and one end of the connecting rod arranged in the inner cavity of the support frame is equipped with a piston rod;

[0008] The cylinder mechanism includes a cylinder, the cylinder is provided with a third through groove for accommodating a piston rod, the piston rod is slidably connected to the third through groove, both side walls of the cylinder are provided with conical grooves, one corner of the conical groove vertically points to the bottom of the cylinder, the conical groove is connected to the third through groove, a baffle is installed on one side of the side wall of the cylinder with the conical groove, the baffle is provided with a through hole, and the through hole is connected to the conical groove.

[0009] In the test flow valve as described above, the front view projection of the tapered groove is an inverted triangle, the through hole is arranged in the upper half of the baffle, and the through hole is arranged on one side of the top of the tapered groove.

[0010] A flow valve for testing as described above, the support frame includes a top plate, the top plate is provided with a first through groove for accommodating the passage of a connecting rod, side plates are installed on both sides of the top plate, a bottom plate is installed at one end of the side plate, the bottom plate is provided with a second through groove for accommodating the passage of a piston rod, a clamping block is installed at one end of the piston rod, and the clamping block is slidably connected to the side plate.

[0011] In the test flow valve as described above, a slide groove is provided on the side wall of the side plate, and sliders are provided on both sides of the clamping block. The sliders are arranged in the slide groove, and the sliders are slidably connected to the slide groove.

[0012] In the test flow valve as described above, a matching portion is provided at the bottom of the clamping block, and a connecting portion matching the matching portion is provided at one end of the piston rod, and the connecting portion is clamped with the matching portion.

[0013] In the test flow valve as described above, the matching portion is a slot or a block, and the connecting portion is a slot or a block.

[0014] In a test flow valve as described above, the power source is a servo motor, one end of the connecting rod is arranged in the inner cavity of the piston rod, one end of the connecting rod is provided with a thread, the inner cavity side wall of the piston rod is provided with a thread, and the connecting rod is slidably connected to the piston rod.

[0015] In the test flow valve as described above, a chamfered section is provided at one end of the piston rod disposed in the third through groove.

[0016] In the test flow valve as described above, a support is installed at the bottom of the cylinder, and the long side length of the support is longer than the long side length of the cylinder.

[0017] The control method of a flow valve for testing as described above comprises the following steps:

[0018] Step 1: Preparation and connection

[0019] Preparation: Make sure all parts are intact before use, especially key parts such as seals, piston rods and tapered grooves;

[0020] Pipeline connection: Connect the pipelines for conveying liquid to the through holes on the baffles on both sides of the cylinder mechanism, usually one side is the liquid inlet and the other side is the liquid outlet, and ensure that the pipelines are installed correctly and there is no leakage;

[0021] Step 2: Initial closed state

[0022] Closing mechanism: When the flow valve is in the initial closed state, the power source, such as a servo motor, does not provide driving force and the piston rod remains in the lowest position;

[0023] Complete blocking: The piston rod is located in the third through groove, and its lower end completely covers the conical groove, forming a physical barrier to prevent any liquid from passing through. At this time, even if there is pressure, the liquid cannot flow from the inlet to the outlet;

[0024] Step 3: Start and adjust the flow

[0025] Open the valve: drive the connecting rod by controlling the power source to drive the piston rod to move upward, which can be achieved by adjusting the rotation direction and speed of the output shaft of the servo motor;

[0026] Gradually open: As the piston rod rises, it begins to gradually reveal the tapered groove, allowing a small amount of liquid to pass through. Since the tapered groove has an inverted triangle shape, when the piston rod just starts to rise, only a very small part of the liquid can pass through, so that the initial flow rate can be finely controlled;

[0027] Flow regulation: The power source can accurately adjust the position of the piston rod as needed to control the size of the tapered slot opening, thereby changing the rate at which the liquid passes through;

[0028] Step 4: Flow Control and Monitoring

[0029] Continuous adjustment: According to actual application requirements, the height of the piston rod can be changed by continuously adjusting the power source, thereby achieving continuously adjustable flow control. As the piston rod rises, the area through which the liquid passes increases, and the flow rate also increases accordingly;

[0030] Flow monitoring: A flow sensor or metering device can be equipped to monitor the liquid flow through the flow valve in real time, so that the operator can adjust the settings in time to achieve the required flow accuracy;

[0031] Step 5: Close the flow valve

[0032] Stop flow: When you need to stop the flow of liquid or reduce the flow, reverse the power source to move the piston rod downward;

[0033] Re-blocking: The piston rod drops to the lowest point, completely closing the conical groove again and returning to the initial closed state. At this time, the liquid will be blocked and cannot continue to pass through the flow valve;

[0034] Maintenance: Perform necessary cleaning and inspection after shutdown to ensure the equipment is in optimal condition the next time it is used.

[0035] Implementing the embodiments of the present invention has the following beneficial effects:

[0036] 1. In the present invention, the position of the piston rod can be adjusted by a power source according to actual application requirements. Since one corner of the conical groove points vertically to the bottom of the cylinder, when the piston rod just starts to rise, only a very small part of the liquid can pass through, so that fine control of the initial flow rate can be achieved.

[0037] 2. In the present invention, the slide groove provides a precise guide path for the slider on the block, ensuring that the piston rod always maintains a straight line motion when moving up and down, preventing the piston rod from deflecting or twisting during the movement, thereby improving the stability and accuracy of the valve.

[0038] In summary, the present invention solves the problem that the fluid flow rate of a traditional flow valve is too large and cannot be accurately controlled at the initial opening stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0040] Figure 1 It is a schematic diagram of the overall structure of a flow valve for testing of the present invention.

[0041] Figure 2 It is an exploded view of a flow valve for testing of the present invention.

[0042] Figure 3 It is a cross-sectional view of a flow valve for testing according to the present invention after the piston rod is installed in a cylinder mechanism.

[0043] Figure 4 It is a structural schematic diagram of a cylinder of a flow valve for testing of the present invention.

[0044] Figure 5 It is a structural schematic diagram of a piston rod of a flow valve for testing of the present invention.

[0045] Figure 6 It is a structural schematic diagram of a side plate of a flow valve for testing of the present invention.

[0046] Figure 7 It is a structural schematic diagram of a clamping block of a flow valve for testing of the present invention.

[0047] Figure 8 It is a structural schematic diagram of a support frame of a flow valve for testing of the present invention.

[0048] As shown in the figure:

[0049] 1. Power mechanism; 101. Power source; 102. Connecting rod; 2. Support mechanism; 201. Support frame; 202. Top plate; 203. Side plate; 2031. Slide groove; 204. Bottom plate; 205. First through groove; 206. Second through groove; 207. Block; 2071. Fitting part; 2072. Sliding block; 208. Piston rod; 2081. Connecting part; 209. Chamfered section; 3. Cylinder mechanism; 301. Cylinder; 3011. Third through groove; 3012. Conical groove; 3013. Round groove; 302. Support; 303. Baffle; 304. Through hole. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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.

[0051] like Figures 1 to 8 As shown, the present invention proposes a flow valve for testing, comprising a power mechanism 1, a support mechanism 2, and a cylinder mechanism 3, wherein the support mechanism 2 comprises a support frame 201, and the power mechanism 1 is mounted at one end of the support frame 201;

[0052] The power mechanism 1 comprises a power mechanism 1, the power mechanism 1 is equipped with a connecting rod 102, one end of the connecting rod 102 passes through the top of the support frame 201 and is arranged in the inner cavity of the support frame 201, and one end of the connecting rod 102 arranged in the inner cavity of the support frame 201 is equipped with a piston rod 208;

[0053] The cylinder mechanism 3 includes a cylinder 301, the cylinder 301 is provided with a third through slot 3011 for accommodating a piston rod 208, the piston rod 208 is slidably connected to the third through slot 3011, both side walls of the cylinder 301 are provided with a tapered slot 3012, one corner of the tapered slot 3012 is vertically directed to the bottom of the cylinder 301, the tapered slot 3012 is connected to the third through slot 3011, and a baffle 303 is installed on one side of the side wall of the cylinder 301 provided with the tapered slot 3012, the baffle 303 is provided with a through hole 304, and the through hole 304 is connected to the tapered slot 3012. Before use, the pipelines for conveying liquid are respectively connected to the through holes 304 on the baffles 303 on both sides of the cylinder mechanism 3, usually one side is a liquid inlet and the other side is a liquid outlet, and when the power mechanism 1 is started, it drives the connecting rod 102 to move. Since the connecting rod 102 passes through the support frame 201 and is connected to the piston rod 208 therein, the movement of the connecting rod 102 directly drives the piston rod 208 to move in the cylinder 301. As the piston rod 208 slides along the third through groove 3011, it can move up or down in the cylinder. This action affects the amount of liquid flowing through the tapered groove 3012 and the through hole 304 on the baffle 303. One corner of the tapered groove 3012 points vertically to the bottom of the cylinder, which means that when the piston rod 208 is at different heights, its relative position with the tapered groove 3012 will change, thereby affecting the ability of the fluid to flow from one side to the other. When the piston rod 208 moves upward, it gradually opens the tapered groove 3012, which increases the space that the fluid can pass from one side to the other side through the tapered groove. Therefore, the flow rate of the fluid increases, and when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through, so that fine control of the initial flow rate can be achieved. On the contrary, when piston rod 208 moves downward, it will be closer to or even partially close tapered groove 3012, reducing the path area that fluid can pass through, resulting in reduced flow. If piston rod completely covers tapered groove, fluid will be blocked.

[0054] Further, as a preferred embodiment of the present invention but not limiting, the front view projection of the tapered groove 3012 is an inverted triangle, the through hole 304 is arranged in the upper half of the baffle 303, and the through hole 304 is arranged on one side of the top of the tapered groove 3012. Since the front view projection of the tapered groove 3012 is an inverted triangle, which gradually narrows from top to bottom, this means that when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through the tapered groove 3012, which helps to achieve fine control of the initial flow rate.

[0055] Furthermore, as a preferred embodiment of the present invention but not a limitation, the support frame 201 includes a top plate 202, the top plate 202 is provided with a first through groove 205 for accommodating the connection rod 102 to pass through, side plates 203 are installed on both sides of the top plate 202, a bottom plate 204 is installed at one end of the side plate 203, the bottom plate 204 is provided with a second through groove 206 for accommodating the piston rod 208 to pass through, a clamping block 207 is installed at one end of the piston rod 208, and the clamping block 207 is slidably connected to the side plate 203.

[0056] The support frame 201 forms a solid frame structure by combining the top plate 202, the side plate 203 and the bottom plate 204. This frame not only supports the power mechanism 1, but also ensures the stability of the piston rod 208 and other components during operation. The first through groove 205 on the top plate 202 is used to accommodate the connecting rod 102 to pass through. This first through groove 205 not only allows the connecting rod 102 to move up and down, but also ensures the linearity of its movement to prevent deviation or distortion. The second through groove 206 on the bottom plate 204 is used to accommodate the piston rod 208 to pass through. This through groove also ensures the linearity and stability of the piston rod 208 when it moves up and down, avoiding unnecessary friction and wear. A clamping block 207 is installed at one end of the piston rod 208, and the clamping block 207 is slidably connected to the side plate 203. This design ensures that the piston rod 208 can slide smoothly along the side plate 203 when it moves up and down, reducing friction and vibration.

[0057] Further, as a preferred embodiment of the present invention but not limiting, a slide groove 2031 is provided on the side wall of the side plate 203, and sliders 2072 are provided on both sides of the clamping block 207, and the sliders 2072 are arranged in the slide groove 2031, and the sliders 2072 are slidably connected with the slide groove 2031. The slide groove 2031 provides a precise guide path for the sliders 2072 on the clamping block 207, ensuring that the piston rod 208 always maintains a linear motion when moving up and down. The piston rod 208 is prevented from being offset or twisted during the movement, thereby improving the stability and precision of the valve.

[0058] Further, as a preferred embodiment of the present invention but not limiting, a matching portion 2071 is provided at the bottom of the block 207, and a connecting portion 2081 matching the matching portion 2071 is provided at one end of the piston rod 208, and the connecting portion 2081 is clamped with the matching portion 2071. The matching portion 2071 is a clamping groove, and the connecting portion 2081 is a block. The clamping design of the matching portion 2071 and the connecting portion 2081 ensures a firm and stable connection between the block 207 and the piston rod 208, and avoids the displacement of the piston rod 208. The clamping design makes the installation of the block 207 and the piston rod 208 simple and quick. The clamping design ensures the precise positioning between the block 207 and the piston rod 208, reduces the position deviation caused by a loose or loose connection, and thus improves the accuracy of flow control.

[0059] Optionally, in some embodiments, the matching portion 2071 is a card block, and the connecting portion 2081 is a card slot.

[0060] Further, as a preferred embodiment of the present invention but not limited thereto, the power source 101 is a servo motor, one end of the connecting rod 102 is arranged in the inner cavity of the piston rod 208, one end of the connecting rod 102 is provided with a thread, the inner cavity side wall of the piston rod 208 is provided with a thread, and the connecting rod 102 is slidably connected with the piston rod 208. The servo motor, as the power source 101, provides rotational motion, and drives the piston rod 208 to rotate through the connecting rod 102. When the servo motor drives the connecting rod 102 to rotate, due to the threaded connection between the connecting rod 102 and the piston rod 208, the rotational motion of the connecting rod 102 is converted into the linear motion of the piston rod 208. The threaded connection has a certain self-locking function. When the servo motor stops working, the threaded connection between the connecting rod 102 and the piston rod 208 can prevent the piston rod 208 from retreating due to external pressure and keep it at the set position.

[0061] Optionally, in some embodiments, the power source 101 is a hydraulic cylinder, and the piston rod 208 is slidably connected to the third through groove 3011. The hydraulic cylinder serves as the power source 101, and drives the piston rod 208 to perform linear motion through the pressure of the hydraulic oil. The hydraulic cylinder can provide a large thrust and pull force, and is suitable for application scenarios that require a large driving force. The hydraulic cylinder directly drives the piston rod 208 to perform linear motion, without the need for a complex transmission mechanism, thereby simplifying the system structure. The smoothness of the hydraulic system makes the movement of the piston rod 208 smoother, reducing vibration and impact.

[0062] Optionally, in some embodiments, the power source 101 is a cylinder, and the piston rod 208 is slidably connected to the third through groove 3011. The cylinder can provide a fast response speed and is suitable for application scenarios that require rapid opening and closing of valves. The cylinder directly drives the piston rod 208 to perform linear motion without the need for a complex transmission mechanism, thereby simplifying the system structure. The smoothness of the cylinder makes the movement of the piston rod 208 smoother, reducing vibration and impact.

[0063] Further, as a preferred embodiment of the present invention but not limiting, one end of the piston rod 208 disposed in the third through slot 3011 is provided with a chamfered section 209. The chamfered section 209 provides a smooth transition area, reducing the direct contact area between the piston rod 208 and the third through slot 3011, thereby reducing friction and wear.

[0064] Further, as a preferred embodiment of the present invention but not limiting, a support 302 is installed at the bottom of the cylinder 301, and the long side length of the support 302 is longer than the long side length of the cylinder 301. The long side length of the support 302 is longer than the long side length of the cylinder 301, providing a wider base, increasing the stability and anti-overturning ability of the entire device. The wider support 302 helps to lower the center of gravity of the entire device, making it more stable during operation and reducing shaking caused by external forces.

[0065] A control method for a flow valve for testing comprises the following steps:

[0066] Step 1: Preparation and connection

[0067] Preparation: Before use, ensure that all parts are intact, especially key parts such as seals, piston rod 208 and tapered groove 3012;

[0068] Pipeline connection: Connect the pipelines for conveying liquid to the through holes 304 on the baffles 303 on both sides of the cylinder mechanism 3, usually one side is the liquid inlet and the other side is the liquid outlet, to ensure that the pipelines are correctly installed and there is no leakage;

[0069] Step 2: Initial closed state

[0070] Closing mechanism: When the flow valve is in the initial closed state, the power source 101, such as a servo motor, does not provide driving force, and the piston rod 208 remains in the lowest position;

[0071] Complete blocking: The piston rod 208 is located in the third through groove 3011, and its lower end completely covers the conical groove 3012, forming a physical barrier to prevent any liquid from passing through. At this time, even if there is pressure, the liquid cannot flow from the liquid inlet to the liquid outlet;

[0072] Step 3: Start and adjust the flow

[0073] Open the valve: control the power source 101 to drive the connecting rod 102 so that it drives the piston rod 208 to move upward, which can be achieved by adjusting the rotation direction and speed of the output shaft of the servo motor;

[0074] Gradually open: As the piston rod 208 rises, it begins to gradually expose the tapered groove 3012, allowing a small amount of liquid to pass through. Since the tapered groove 3012 has an inverted triangle shape, when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through, so that the initial flow rate can be finely controlled;

[0075] Flow regulation: The power source 101 can accurately adjust the position of the piston rod 208 as needed to control the opening size of the tapered groove 3012, thereby changing the rate at which the liquid passes through;

[0076] Step 4: Flow Control and Monitoring

[0077] Continuous adjustment: According to actual application requirements, the height of the piston rod 208 can be changed by continuously adjusting the power source 101, thereby achieving continuously adjustable flow control. As the piston rod 208 is raised, the area through which the liquid passes increases, and the flow rate also increases accordingly;

[0078] Flow monitoring: A flow sensor or metering device can be equipped to monitor the liquid flow through the flow valve in real time, so that the operator can adjust the settings in time to achieve the required flow accuracy;

[0079] Step 5: Close the flow valve

[0080] Stop flow: When it is necessary to stop the flow of liquid or reduce the flow, the power source 101 is operated in reverse to move the piston rod 208 downward;

[0081] Re-blocking: The piston rod 208 drops to the lowest point, completely closing the conical groove 3012 again, and returning to the initial closed state. At this time, the liquid will be blocked and cannot continue to pass through the flow valve;

[0082] Maintenance: Perform necessary cleaning and inspection after shutdown to ensure the equipment is in optimal condition the next time it is used.

[0083] Embodiment 1:

[0084] A flow valve for testing, comprising a power mechanism 1, a support mechanism 2, and a cylinder mechanism 3, wherein the support mechanism 2 comprises a support frame 201, and the power mechanism 1 is mounted at one end of the support frame 201;

[0085] The power mechanism 1 comprises a power mechanism 1, the power mechanism 1 is equipped with a connecting rod 102, one end of the connecting rod 102 passes through the top of the support frame 201 and is arranged in the inner cavity of the support frame 201, and one end of the connecting rod 102 arranged in the inner cavity of the support frame 201 is equipped with a piston rod 208;

[0086] The cylinder mechanism 3 includes a cylinder 301, the cylinder 301 is provided with a third through slot 3011 for accommodating a piston rod 208, the piston rod 208 is slidably connected to the third through slot 3011, both side walls of the cylinder 301 are provided with a tapered slot 3012, one corner of the tapered slot 3012 is vertically directed to the bottom of the cylinder 301, the tapered slot 3012 is connected to the third through slot 3011, and a baffle 303 is installed on one side of the side wall of the cylinder 301 provided with the tapered slot 3012, the baffle 303 is provided with a through hole 304, and the through hole 304 is connected to the tapered slot 3012. Before use, the pipelines for conveying liquid are respectively connected to the through holes 304 on the baffles 303 on both sides of the cylinder mechanism 3, usually one side is a liquid inlet and the other side is a liquid outlet, and when the power mechanism 1 is started, it drives the connecting rod 102 to move. Since the connecting rod 102 passes through the support frame 201 and is connected to the piston rod 208 therein, the movement of the connecting rod 102 directly drives the piston rod 208 to move in the cylinder 301. As the piston rod 208 slides along the third through groove 3011, it can move up or down in the cylinder. This action affects the amount of liquid flowing through the tapered groove 3012 and the through hole 304 on the baffle 303. One corner of the tapered groove 3012 points vertically to the bottom of the cylinder, which means that when the piston rod 208 is at different heights, its relative position with the tapered groove 3012 will change, thereby affecting the ability of the fluid to flow from one side to the other. When the piston rod 208 moves upward, it gradually opens the tapered groove 3012, which increases the space that the fluid can pass from one side to the other side through the tapered groove. Therefore, the flow rate of the fluid increases, and when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through, so that fine control of the initial flow rate can be achieved. On the contrary, when piston rod 208 moves downward, it will be closer to or even partially close tapered groove 3012, reducing the path area that fluid can pass through, resulting in reduced flow. If piston rod completely covers tapered groove, fluid will be blocked.

[0087] The front view projection of the conical groove 3012 is an inverted triangle, the through hole 304 is arranged in the upper half of the baffle 303, and the through hole 304 is arranged on one side of the top of the conical groove 3012. Since the front view projection of the conical groove 3012 is an inverted triangle, which gradually narrows from top to bottom, it means that when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through the conical groove 3012, which helps to achieve fine control of the initial flow rate.

[0088] The support frame 201 includes a top plate 202, the top plate 202 is provided with a first through slot 205 for accommodating the connection rod 102 to pass through, side plates 203 are installed on both sides of the top plate 202, a bottom plate 204 is installed at one end of the side plate 203, the bottom plate 204 is provided with a second through slot 206 for accommodating the piston rod 208 to pass through, a block 207 is installed at one end of the piston rod 208, and the block 207 is slidably connected to the side plate 203. The support frame 201 forms a solid frame structure through the combination of the top plate 202, the side plate 203 and the bottom plate 204. This frame not only supports the power mechanism 1, but also ensures the stability of the piston rod 208 and other components during the working process. The first through slot 205 on the top plate 202 is used to accommodate the connection rod 102 to pass through. This first through slot 205 not only allows the connection rod 102 to move up and down, but also ensures the linearity of its movement to prevent deviation or distortion. The second through slot 206 on the bottom plate 204 is used to accommodate the piston rod 208. This through slot also ensures the linearity and stability of the piston rod 208 when it moves up and down, avoiding unnecessary friction and wear. A clamping block 207 is installed at one end of the piston rod 208, and the clamping block 207 is slidably connected to the side plate 203. This design ensures that the piston rod 208 can slide smoothly along the side plate 203 when it moves up and down, reducing friction and vibration.

[0089] The side wall of the side plate 203 is provided with a slide groove 2031, and sliders 2072 are provided on both sides of the clamping block 207. The sliders 2072 are arranged in the slide groove 2031, and the sliders 2072 are slidably connected with the slide groove 2031. The slide groove 2031 provides a precise guide path for the slider 2072 on the clamping block 207, ensuring that the piston rod 208 always maintains a linear motion when moving up and down. The piston rod 208 is prevented from being offset or twisted during the movement, thereby improving the stability and precision of the valve.

[0090] The bottom of the clamping block 207 is provided with a matching portion 2071, and one end of the piston rod 208 is provided with a connecting portion 2081 matching the matching portion 2071, and the connecting portion 2081 is clamped with the matching portion 2071. The matching portion 2071 is a clamping groove, and the connecting portion 2081 is a clamping block. The clamping design of the matching portion 2071 and the connecting portion 2081 ensures a firm and stable connection between the clamping block 207 and the piston rod 208, and avoids the displacement of the piston rod 208. The clamping design makes the installation of the clamping block 207 and the piston rod 208 simple and quick. The clamping design ensures the precise positioning between the clamping block 207 and the piston rod 208, reduces the position deviation caused by a loose or loose connection, and thus improves the accuracy of flow control.

[0091] The power source 101 is a servo motor, one end of the connecting rod 102 is arranged in the inner cavity of the piston rod 208, one end of the connecting rod 102 is provided with a thread, the inner cavity side wall of the piston rod 208 is provided with a thread, and the connecting rod 102 is slidably connected with the piston rod 208. The servo motor, as the power source 101, provides rotational motion, and drives the piston rod 208 to rotate through the connecting rod 102. When the servo motor drives the connecting rod 102 to rotate, due to the threaded connection between the connecting rod 102 and the piston rod 208, the rotational motion of the connecting rod 102 is converted into the linear motion of the piston rod 208. The threaded connection has a certain self-locking function. When the servo motor stops working, the threaded connection between the connecting rod 102 and the piston rod 208 can prevent the piston rod 208 from retreating due to external pressure and keep it at the set position.

[0092] The end of the piston rod 208 disposed in the third through slot 3011 is provided with a chamfered section 209. The chamfered section 209 provides a smooth transition area, reducing the direct contact area between the piston rod 208 and the third through slot 3011, thereby reducing friction and wear.

[0093] A support 302 is installed at the bottom of the cylinder 301, and the long side length of the support 302 is longer than the long side length of the cylinder 301. The long side length of the support 302 is longer than the long side length of the cylinder 301, providing a wider base, increasing the stability and anti-overturning ability of the entire device. The wider support 302 helps to lower the center of gravity of the entire device, making it more stable during operation and reducing shaking caused by external forces.

[0094] A control method for a flow valve for testing comprises the following steps:

[0095] Step 1: Preparation and connection

[0096] Preparation: Before use, ensure that all parts are intact, especially key parts such as seals, piston rod 208 and tapered groove 3012;

[0097] Pipeline connection: Connect the pipelines for conveying liquid to the through holes 304 on the baffles 303 on both sides of the cylinder mechanism 3, usually one side is the liquid inlet and the other side is the liquid outlet, to ensure that the pipelines are correctly installed and there is no leakage;

[0098] Step 2: Initial closed state

[0099] Closing mechanism: When the flow valve is in the initial closed state, the power source 101, such as a servo motor, does not provide driving force, and the piston rod 208 remains in the lowest position;

[0100] Complete blocking: The piston rod 208 is located in the third through groove 3011, and its lower end completely covers the conical groove 3012, forming a physical barrier to prevent any liquid from passing through. At this time, even if there is pressure, the liquid cannot flow from the liquid inlet to the liquid outlet;

[0101] Step 3: Start and adjust the flow

[0102] Open the valve: control the power source 101 to drive the connecting rod 102 so that it drives the piston rod 208 to move upward, which can be achieved by adjusting the rotation direction and speed of the output shaft of the servo motor;

[0103] Gradually open: As the piston rod 208 rises, it begins to gradually expose the tapered groove 3012, allowing a small amount of liquid to pass through. Since the tapered groove 3012 has an inverted triangle shape, when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through, so that the initial flow rate can be finely controlled;

[0104] Flow regulation: The power source 101 can accurately adjust the position of the piston rod 208 as needed to control the opening size of the tapered groove 3012, thereby changing the rate at which the liquid passes through;

[0105] Step 4: Flow Control and Monitoring

[0106] Continuous adjustment: According to actual application requirements, the height of the piston rod 208 can be changed by continuously adjusting the power source 101, thereby achieving continuously adjustable flow control. As the piston rod 208 is raised, the area through which the liquid passes increases, and the flow rate also increases accordingly;

[0107] Flow monitoring: A flow sensor or metering device can be equipped to monitor the liquid flow through the flow valve in real time, so that the operator can adjust the settings in time to achieve the required flow accuracy;

[0108] Step 5: Close the flow valve

[0109] Stop flow: When it is necessary to stop the flow of liquid or reduce the flow, the power source 101 is operated in reverse to move the piston rod 208 downward;

[0110] Re-blocking: The piston rod 208 drops to the lowest point, completely closing the conical groove 3012 again, and returning to the initial closed state. At this time, the liquid will be blocked and cannot continue to pass through the flow valve;

[0111] Maintenance: Perform necessary cleaning and inspection after shutdown to ensure the equipment is in optimal condition the next time it is used.

[0112] The implementation method of the second embodiment is as follows:

[0113] The difference between the second embodiment and the first embodiment is that the power source 101 is a hydraulic cylinder, and the piston rod 208 is slidably connected to the third through groove 3011. The hydraulic cylinder serves as the power source 101, and drives the piston rod 208 to perform linear motion through the pressure of the hydraulic oil. The hydraulic cylinder can provide a large thrust and pull force, and is suitable for application scenarios that require a large driving force. The hydraulic cylinder directly drives the piston rod 208 to perform linear motion, without the need for a complex transmission mechanism, thereby simplifying the system structure. The smoothness of the hydraulic system makes the movement of the piston rod 208 smoother, reducing vibration and impact.

[0114] The implementation method of the third embodiment is as follows:

[0115] The difference between the third embodiment and the first embodiment is that the power source 101 is a cylinder, and the piston rod 208 is slidably connected to the third through groove 3011. The cylinder can provide a fast response speed and is suitable for application scenarios where a valve needs to be opened and closed quickly. The cylinder directly drives the piston rod 208 to perform linear motion without the need for a complex transmission mechanism, thereby simplifying the system structure. The smoothness of the cylinder makes the movement of the piston rod 208 smoother, reducing vibration and impact.

[0116] Specifically, the working principle of the present invention is as follows:

[0117] In the initial closed state, the servo motor does not provide driving force, and the piston rod 208 is located at the lowest position in the third through groove 3011, completely blocking the tapered groove 3012, preventing the liquid from flowing from the liquid inlet to the liquid outlet. When the valve needs to be opened, the servo motor drives the connecting rod 102 to rotate, and the rotary motion is converted into a linear upward movement of the piston rod 208 through a threaded connection. As the piston rod 208 rises, the tapered groove 3012 is gradually opened to allow liquid to pass through. Due to the inverted triangle shape of the tapered groove 3012, when the piston rod 208 just starts to rise, only a very small part of the liquid can pass through, thereby achieving fine control of the initial flow rate.

[0118] The servo motor can precisely adjust the position of the piston rod 208 as needed, and control the rate at which the liquid passes by changing the opening size of the tapered groove 3012. As the piston rod 208 rises further, the open area of ​​the tapered groove 3012 gradually increases, and more liquid can flow through, thereby achieving continuously adjustable flow control.

[0119] When it is necessary to stop the flow of liquid or reduce the flow rate, the servo motor operates in the reverse direction to move the piston rod 208 downward, re-close the conical groove 3012, and return to the initial closed state. At this time, the liquid is blocked again and cannot continue to pass through the flow valve. During the whole process, the support frame 201, the slide groove 2031 and the slider 2072, as well as the chamfered section 209, etc. work together to ensure the smooth movement and high-precision control of the piston rod 208.

[0120] In summary, the present invention solves the problem that the fluid flow rate of the traditional flow valve is too large and cannot be accurately controlled at the initial opening stage.

[0121] It should be understood that the terms "first", "second", etc. are used in the present invention to describe various information, but such information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, the "first" information may also be referred to as the "second" information, and similarly, the "second" information may also be referred to as the "first" information. In addition, the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations 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 orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0122] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A flow valve for testing, comprising a power mechanism (1), a support mechanism (2), and a cylinder mechanism (3), characterized in that: The support mechanism (2) comprises a support frame (201), and the power mechanism (1) is installed at one end of the support frame (201); The power mechanism (1) comprises a power mechanism (1), the power mechanism (1) being equipped with a connecting rod (102), one end of the connecting rod (102) passing through the top of the support frame (201) and being arranged in the inner cavity of the support frame (201), and one end of the connecting rod (102) being arranged in the inner cavity of the support frame (201) being equipped with a piston rod (208); The cylinder mechanism (3) comprises a cylinder (301), the cylinder (301) being provided with a third through groove (3011) for accommodating a piston rod (208), the piston rod (208) being slidably connected to the third through groove (3011), both side walls of the cylinder (301) being provided with conical grooves (3012), one corner of the conical groove (3012) being vertically directed to the bottom of the cylinder (301), the conical groove (3012) being connected to the third through groove (3011), a baffle (303) being installed on one side of the side wall of the cylinder (301) being provided with the conical groove (3012), the baffle (303) being provided with a through hole (304), the through hole (304) being connected to the conical groove (3012).

2. A flow valve for testing according to claim 1, characterized in that: The front view projection of the conical groove (3012) is an inverted triangle, the through hole (304) is arranged on the upper half of the baffle (303), and the through hole (304) is arranged on one side of the top of the conical groove (3012).

3. A flow valve for testing according to claim 1, characterized in that: The support frame (201) comprises a top plate (202), the top plate (202) being provided with a first through groove (205) for accommodating the connection rod (102) to pass through, side plates (203) being installed on both sides of the top plate (202), a bottom plate (204) being installed at one end of the side plate (203), the bottom plate (204) being provided with a second through groove (206) for accommodating the piston rod (208) to pass through, a clamping block (207) being installed at one end of the piston rod (208), and the clamping block (207) being slidably connected to the side plate (203).

4. A flow valve for testing according to claim 3, characterized in that: A sliding groove (2031) is provided on the side wall of the side plate (203), and sliding blocks (2072) are provided on both sides of the clamping block (207). The sliding blocks (2072) are arranged in the sliding groove (2031), and the sliding blocks (2072) are slidably connected to the sliding groove (2031).

5. A flow valve for testing according to claim 3, characterized in that: A matching portion (2071) is provided at the bottom of the clamping block (207), and a connecting portion (2081) matching the matching portion (2071) is provided at one end of the piston rod (208), and the connecting portion (2081) is clamped with the matching portion (2071).

6. A flow valve for testing according to claim 5, characterized in that: The matching portion (2071) is a slot or a block, and the connecting portion (2081) is a slot or a block.

7. A flow valve for testing according to claim 1, characterized in that: The power source (101) is a servo motor, one end of the connecting rod (102) is arranged in the inner cavity of the piston rod (208), one end of the connecting rod (102) is provided with a thread, the inner cavity side wall of the piston rod (208) is provided with a thread, and the connecting rod (102) is slidably connected to the piston rod (208).

8. A flow valve for testing according to claim 1, characterized in that: One end of the piston rod (208) disposed in the third through groove (3011) is provided with a chamfered section (209).

9. A flow valve for testing according to claim 1, characterized in that: A support (302) is installed at the bottom of the cylinder (301), and the length of the long side of the support (302) is longer than the length of the long side of the cylinder (301).

10. A control method for a flow valve for testing according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: Preparation and connection Preparation: Before use, ensure that all parts are intact, especially key parts such as seals, piston rod (208) and tapered groove (3012); Pipeline connection: connect the pipelines for conveying liquid to the through holes (304) on the baffles (303) on both sides of the cylinder mechanism (3), usually one side is the liquid inlet and the other side is the liquid outlet, and ensure that the pipelines are correctly installed and there is no leakage; Step 2: Initial closed state Closing mechanism: When the flow valve is in the initial closing state, the power source (101), such as a servo motor, does not provide driving force, and the piston rod (208) remains in the lowest position; Complete blocking: The piston rod (208) is located in the third through groove (3011), and its lower end completely covers the conical groove (3012), forming a physical barrier to prevent any liquid from passing through. At this time, even if there is pressure, the liquid cannot flow from the liquid inlet to the liquid outlet; Step 3: Start and adjust the flow Open the valve: by controlling the power source (101) to drive the connecting rod (102), so that it drives the piston rod (208) to move upward, which can be achieved by adjusting the rotation direction and speed of the output shaft of the servo motor; Gradually open: As the piston rod (208) rises, it begins to gradually expose the tapered groove (3012), allowing a small amount of liquid to pass through. Since the tapered groove (3012) has an inverted triangle shape, when the piston rod (208) just starts to rise, only a very small part of the liquid can pass through, so that the initial flow rate can be finely controlled; Flow regulation: The power source (101) can accurately adjust the position of the piston rod (208) as needed, thereby controlling the opening size of the tapered groove (3012) and thereby changing the rate at which the liquid passes through; Step 4: Flow Control and Monitoring Continuous adjustment: According to actual application requirements, the height of the piston rod (208) can be changed by continuously adjusting the power source (101), thereby achieving continuously adjustable flow control. As the piston rod (208) is raised, the area through which the liquid passes increases, and the flow rate also increases accordingly; Flow monitoring: A flow sensor or metering device can be equipped to monitor the liquid flow through the flow valve in real time, so that the operator can adjust the settings in time to achieve the required flow accuracy; Step 5: Close the flow valve Stop flow: When it is necessary to stop the flow of liquid or reduce the flow rate, the power source (101) is operated in reverse to move the piston rod (208) downward; Re-blocking: The piston rod (208) drops to the lowest point, completely closing the conical groove (3012) again, and returning to the initial closed state. At this time, the liquid will be blocked and cannot continue to pass through the flow valve; Maintenance: Perform necessary cleaning and inspection after shutdown to ensure the equipment is in optimal condition the next time it is used.

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