A spin-repairable one-way valve, plunger pump and processing application method thereof

Abstract

The application relates to a self-rotating repairable one-way valve, a plunger pump and a processing application method thereof, relates to the technical field of plunger pump components, and comprises a valve core for opening and closing a flow channel, a valve seat in sealing cooperation with the valve core and a spring for providing pre-tightening force for the valve core, the valve core is provided with a self-rotation structure for rotating with fluid passing through to drive the valve core; the self-rotation structure comprises a plurality of inclined edge blocks, the inclined edge blocks are in sliding connection in abutment with the valve seat, one side of the inclined edge blocks is provided with an inclined surface for guiding fluid to impact obliquely, and adjacent inclined edge blocks form a water passing groove for fluid passing through when the valve core and the valve seat are separated. The application has the effects of reducing damage of impurities to the valve seat and maintaining the sealing property of the one-way valve.

Description

Technical Field

[0001] This invention relates to the field of plunger pump component technology, and in particular to a spin-repairable check valve, a plunger pump, and their processing and application methods. Background Technology

[0002] As a typical positive displacement fluid machine, the plunger pump has the characteristics of high pressure and high volumetric efficiency. The check valve is the core component of the plunger pump to realize the function of liquid suction and discharge, and its performance directly determines the overall efficiency, reliability and service life of the pump.

[0003] The one-way valves that are currently used with plunger pumps mostly adopt the traditional cylindrical valve core structure, which usually consists of a valve seat, a valve core and a spring. The spring pushes the valve core to keep it in contact with the valve seat. High-pressure fluid can push open the valve core and compress the spring, and pass through the gap between the valve seat and the valve core in one direction. It cannot flow in the opposite direction, thus realizing the one-way delivery of fluid.

[0004] However, when impurities are present in the high-pressure fluid, the impurities will be squeezed and adhered to the sealing surface of the valve seat by the spring-loaded valve core, which can easily damage the valve seat and reduce the sealing function of the check valve. Summary of the Invention

[0005] To reduce damage to the valve seat from impurities and maintain the sealing performance of the check valve, this invention provides a spin-repairable check valve, a plunger pump, and its processing and application methods.

[0006] In a first aspect, the present invention provides a spin-repairable one-way valve, which adopts the following technical solution:

[0007] A spin-repairable one-way valve includes a valve core for opening and closing a flow channel, a valve seat that seals with the valve core, and a spring that provides a preload force to the valve core. The valve core is provided with a spin structure for rotating the valve core as fluid flows through it.

[0008] The spin structure includes several oblique ridge blocks, which are slidably connected to the valve seat. One side of each oblique ridge block is provided with an inclined surface for guiding the fluid to make oblique impacts. Adjacent oblique ridge blocks form a water passage groove for the fluid to pass through when the valve core and the valve seat are separated.

[0009] By adopting the above technical solution, the inclined surface on the inclined block guides the fluid to form an oblique impact, which drives the valve core to rotate, realizing the automatic rotation of the valve core as the fluid passes through. During the opening and closing impact process with the valve seat, the valve core grinds and repairs the pits and depressions caused by impurities on the valve seat surface, reducing the damage of impurities to the valve seat and improving the sealing performance between the valve seat and the valve core.

[0010] Optionally, the valve core and the valve seat have an opening and closing channel for fluid to pass through, wherein the material hardness of the valve core at the opening and closing channel is higher than that of the valve seat.

[0011] By adopting the above technical solution, the material hardness of the valve core is set to be higher than that of the valve seat, which can effectively reduce the wear of the valve core during the self-spinning and opening and closing impact process, while improving the repair effect on the pits on the valve seat and ensuring the integrity of the seal between the valve core and the valve seat.

[0012] Optionally, a gasket is provided between the valve core and the spring to reduce the circumferential resistance of the spring to the valve core when the valve core rotates. The gasket is made of a material with wear-resistant and self-lubricating properties.

[0013] By adopting the above technical solution, the gasket isolates the valve core from direct contact with the spring. During the rotation of the valve core, the sliding friction between the valve core and the spring is changed into low-resistance friction between the gasket and the spring, thereby reducing the circumferential resistance of the spring to the valve core.

[0014] Secondly, the plunger pump provided by the present invention adopts the following technical solution:

[0015] A plunger pump, comprising a spin-repairable check valve as described in the first aspect, characterized in that it further comprises a power end assembly having a plunger rod and a hydraulic end assembly for cooperating with said power end assembly to convert low-pressure fluid into high-pressure fluid output;

[0016] The hydraulic end assembly has a pump chamber for mounting a spin-repairable check valve, an inlet channel for guiding low-pressure fluid into the pump chamber, and an outlet channel for guiding high-pressure fluid out. The valve seat and valve body are detachably installed inside the pump chamber. One end of the inlet channel is connected to the side of the pump chamber near the valve body, and the outlet channel is connected to the side of the pump chamber near the valve seat.

[0017] One end of the plunger rod is located in the pump chamber near the valve body, and the plunger rod is used to reciprocate to drive fluid delivery.

[0018] By adopting the above technical solution, the reciprocating movement of the plunger rod causes the pump chamber to circulate in negative pressure suction and high pressure push states. In the negative pressure suction state, the fluid in the inlet channel is drawn in, and in the high pressure push state, in conjunction with the self-repairable check valve, the fluid in the pump chamber is output at high pressure, converting low pressure fluid into high pressure fluid, thus achieving efficient energy conversion.

[0019] Thirdly, this application provides a method for processing and applying a spin-repairable check valve, employing the following technical solution:

[0020] A method for processing and applying a spin-repairable check valve, used in a plunger pump as described in the second aspect, includes:

[0021] Step 10: In response to the assembly signal, acquire pumping power, pump chamber size, and fluid information;

[0022] Step 11: Determine the target rotational speed based on fluid information;

[0023] Step 12: Match the foundation slope with the pumping power and target rotational speed;

[0024] Step 13: Determine the valve core model and its corresponding bevel height based on the pump cavity dimensions;

[0025] Step 14: Determine the correction factor based on the height of the inclined plane and fluid information;

[0026] Step 15: Calculate and determine the slope of the inclined edge by combining the correction factor and the base slope;

[0027] Step 16: Machining and assembly based on the bevel angle and valve core model.

[0028] By adopting the above technical solution, and based on the working environment of the plunger pump that requires the one-way valve to be assembled, the corresponding valve core model is selected and the corresponding bevel angle is matched for cutting, thereby achieving precise adaptation of the bevel block to the actual working conditions and improving the spin stability of the one-way valve after machining and assembly.

[0029] Optionally, the machining process based on the bevel angle and valve core model includes:

[0030] Step 20: Set the speed range and oscillation threshold according to the target speed and the preset accuracy level;

[0031] Step 21: Determine the water-facing area based on the valve core model and the slope of the beveled edge;

[0032] Step 22: Determine the water flow thrust based on pumping power and upstream area;

[0033] Step 23: Set the verification parameters based on the water flow thrust and the slope of the inclined plane;

[0034] Step 24: Based on the calibration parameters, blow air and collect the rotation speed and sway amplitude;

[0035] Step 25: When the rotational speed falls within the rotational speed range and the oscillation amplitude is less than the oscillation threshold, the machining verification is completed.

[0036] By adopting the above technical solution, after machining, the airflow is used to simulate the actual working environment, and the rotation speed and sway amplitude are collected as verification indicators to intuitively detect the machining accuracy of the valve core and reduce the probability of defective products flowing into subsequent processes.

[0037] Optionally, after determining the slope of the beveled edge, the following can be included:

[0038] Step 30: If the slope of the beveled edge is greater than the preset upper limit of the slope, the upper limit of the slope is used as the corrected slope of the beveled edge.

[0039] Step 31: Match the energizing current according to the corrected slope of the inclined plane and the target rotational speed;

[0040] Step 32: Determine the energizing parameters based on the energizing current and the preset energizing position;

[0041] Step 33: When the running signal is detected, the energizing parameters are synchronously executed to energize the spring.

[0042] By adopting the above technical solution, when the slope of the oblique edge exceeds the maximum allowable value, the upper limit of the slope is used as the slope of the oblique edge for cutting. Then, by energizing the spring, a repulsive force is generated between it and the pad containing the permanent magnet, thereby reducing the spring's clamping force on the valve core and compensating for the speed reduction caused by insufficient oblique edge slope.

[0043] Optionally, current matching methods include:

[0044] Step 40: Collect the pre-compression force of the spring and washer to obtain the resistance torque coefficient and magnetic circuit parameters;

[0045] Step 41: Determine the target torque based on the upper limit of the slope and the target rotational speed;

[0046] Step 42: Determine the target clamping force by combining the target torque and the resistance torque coefficient;

[0047] Step 43: Calculate and determine the difference in clamping force based on the pre-clamping force and the target clamping force;

[0048] Step 44: Determine the energizing current by combining the magnetic circuit parameters and the difference in clamping force.

[0049] By adopting the above technical solution, based on the principle of mechanical balance, and combining the pre-tightening force and the resistance torque coefficient to calculate the target clamping force and the clamping force difference, the calculation of the energizing current is made to fit the actual mechanical requirements of the valve core rotation. Then, the energizing current is determined by combining the magnetic circuit parameters, thus achieving the matching of the electromagnetic repulsion force and the clamping force difference.

[0050] Optional methods for setting the speed range include:

[0051] Step 50: Determine the deviation coefficient based on the pumping power and accuracy class;

[0052] Step 510: If the slope of the inclined plane is inconsistent with the upper limit of the slope, take the target rotational speed as the midpoint of the interval;

[0053] Step 511: If the slope of the inclined plane is consistent with the upper limit of the slope, determine the expected rotational speed based on the upper limit of the slope and the pumping power;

[0054] Step 52: Use the expected rotational speed as the midpoint of the interval;

[0055] Step 53: Determine the speed range based on the deviation coefficient and the median of the interval.

[0056] By adopting the above technical solution, the slope of the oblique edge is compared with the upper limit of the slope, thereby determining the correction status of the oblique edge slope. This reduces the misjudgment caused by the lack of compensation for the valve core speed during calibration, which leads to an incorrect judgment standard for the speed range.

[0057] Optionally, after collecting the rotation speed and sway amplitude, the following may also be included:

[0058] Step 60: If the swaying amplitude is less than the swaying threshold and the rotation speed does not fall within the rotation speed range, determine the fluctuation threshold and intensity threshold according to the accuracy requirements;

[0059] Step 61: Set the data acquisition number and its corresponding data acquisition path based on the valve core model and rotation speed;

[0060] Step 62: Collect turbulence intensity according to the collection number and collection path;

[0061] Step 63: Based on the same acquisition number, determine the turbulence fluctuation by turbulence intensity;

[0062] Step 64: When all turbulent fluctuations are less than the fluctuation threshold, calculate the average intensity based on the turbulence intensity;

[0063] Step 65: Define the acquisition number corresponding to the average intensity that is greater than the intensity threshold as the abnormal number;

[0064] Step 66: Grind based on the anomaly number, bevel angle, and valve core model.

[0065] By adopting the above technical solution, when the valve core sway amplitude is qualified but the rotation speed is not up to standard, the cause of the abnormal rotation speed is determined by the fluctuation and intensity of turbulence. It is found that the slope surface is too rough due to the cutting process, and then the rough slope surface is polished to eliminate the abnormality.

[0066] Optionally, after calculating the average strength, the following may also be included:

[0067] Step 70: If the average strength is not greater than the strength threshold, collect and verify the clamping force;

[0068] Step 71: When the verification clamping force is greater than the pre-clamping force, calculate the verification difference by combining the verification clamping force and the pre-clamping force;

[0069] Step 72: Determine the verification current based on the verification difference;

[0070] Step 73: Based on the verification current and the preset verification power-on position, power on and re-blow air to collect data.

[0071] By adopting the above technical solution, under the condition that the turbulence intensity is not abnormal, the reason for the abnormal rotation speed is determined by comparing the verification clamping force with the pre-clamping force. It is because the clamping force of the spring on the valve core of the verification station is too large. The spring is energized to eliminate the influence of the clamping force, and air is blown again to collect the data.

[0072] In summary, the present invention has at least one of the following beneficial technical effects:

[0073] The inclined surface on the inclined block guides the water flow to form an oblique impact, which drives the valve core to rotate. This achieves automatic rotation of the valve core as it passes through the water flow. During the opening and closing impact of the valve core with the valve seat, the impurities that cause pits on the valve seat surface are ground and repaired, reducing the damage of impurities to the valve seat and improving the sealing performance between the valve seat and the valve core.

[0074] The pump chamber circulates between negative pressure suction and high pressure push by the reciprocating movement of the plunger rod. In the negative pressure suction state, fluid is drawn into the inlet channel, while in the high pressure push state, the self-repairable check valve outputs the fluid in the pump chamber at high pressure, converting low-pressure fluid into high-pressure fluid and achieving efficient energy conversion.

[0075] Based on the working environment of the plunger pump equipped with the check valve, the corresponding valve core model is selected and the corresponding bevel angle is matched for cutting. This achieves precise adaptation of the bevel block to the actual working conditions and improves the spin stability of the check valve after machining and assembly. Attached Figure Description

[0076] Figure 1 This is a schematic diagram of the structure of a spin-repairable check valve according to this application;

[0077] Figure 2 This is an installation diagram of a spin-repairable check valve according to this application;

[0078] Figure 3 This is a cross-sectional view of a spin-repairable check valve according to this application;

[0079] Figure 4 This is a partial structural schematic diagram of a spin-repairable check valve according to this application;

[0080] Figure 5 This is a schematic diagram of the structure of a plunger pump according to this application;

[0081] Figure 6 This is a cross-sectional view of a plunger pump according to this application.

[0082] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Valve seat; 11. Sealing ring; 2. Valve core; 21. Spinning structure; 211. Beveled block; 212. Water passage groove; 3. Spring; 4. Valve body; 5. Gasket; 6. Power end assembly; 61. Piston rod; 7. Hydraulic end assembly; 71. Pump chamber; 72. Inlet water passage; 73. Outlet water passage. Detailed Implementation

[0083] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0084] This invention discloses a spin-repairable one-way valve.

[0085] Reference Figure 1 A self-repairable check valve includes a valve core 2, a valve seat 1, a spring 3, and a valve body 4.

[0086] The valve seat 1 is a hollow cylinder, and a sealing ring 11 is provided on the outside of the valve seat 1 for sealing during installation.

[0087] The valve core 2 is located at the lower end of the valve seat 1 and is fitted and sealed with the valve seat 1. There is an opening and closing channel between the valve core 2 and the valve seat 1 for fluid to pass through. The material hardness of the valve core 2 at the opening and closing channel is higher than that of the valve seat 1. In this embodiment, the valve core 2 is made of 40Cr alloy steel and the valve seat 1 is made of tin bronze.

[0088] The valve body 4 is fixedly installed on the side of the valve seat 1 near the valve core 2. The spring 3 is located between the valve core 2 and the valve body 4, and the two ends of the spring 3 abut against the valve core 2 and the valve body 4 respectively. The spring 3 is used to provide preload force to push the valve core 2 to fit against the valve seat 1.

[0089] The valve core 2 is provided with a spin structure 21, which consists of three rotationally symmetrical oblique blocks 211. The three oblique blocks 211 are evenly distributed circumferentially on the upper end of the valve core 2 and are integrally connected with the valve core 2. The oblique blocks 211 are slidably connected to the inner wall of the valve seat 1. One side of the oblique blocks 211 is inclined along the direction of fluid movement. The oblique surface of the oblique blocks 211 is used to guide the fluid to make oblique impacts to drive the valve core 2 and the oblique blocks 211 to rotate as a whole. A water passage groove 212 is formed between adjacent oblique blocks 211. The water passage groove 212 is used to allow fluid to pass through when the valve core 2 and the valve seat 1 are separated.

[0090] A gasket 5 is provided between the valve core 2 and the spring 3. The gasket 5 is fixedly connected to the valve core 2 and slides with the spring 3 with low friction. The gasket 5 is used to isolate the valve core 2 and the spring 3 to eliminate the circumferential resistance of the spring 3 to the rotation of the valve core 2, while maintaining the uniform transmission of the preload of the spring 3 to the valve core 2. In this embodiment, the gasket 5 is made of carbon fiber modified polytetrafluoroethylene, which has wear-resistant and self-lubricating properties.

[0091] The fluid pushes the valve core and compresses the spring, opening the opening and closing channel between the valve core and the valve seat, allowing the fluid to flow into one side of the valve body from the opening and closing channel. The fluid cannot open the opening and closing channel in the opposite direction, thus achieving unidirectional delivery.

[0092] When the fluid passes through the opening and closing channel, it flows along the inclined surface of the inclined block 211 and impacts the inclined block 211. The inclined block 211 drives the valve core 2 and the gasket 5 to rotate slightly as a whole. The gasket 5 is used to reduce the circumferential frictional resistance brought by the spring 3 during the rotation. When the spring 3 pushes the valve core 2 to fit with the valve seat 1, the pits on the valve seat 1 that were originally squeezed by impurities are flattened by the valve core 2, ensuring the sealing performance when the valve core 2 and the valve seat 1 are fitted together, reducing the risk of fluid flowing backward through the opening and closing channel. At the same time, the sliding of the inclined block 211 and the valve seat 1 reduces the risk of the valve core 2 tilting or getting stuck, ensuring that the sealing surfaces of the valve core 2 and the valve seat 1 are always aligned, further improving the sealing performance.

[0093] Based on the same inventive concept, embodiments of the present invention provide a plunger pump.

[0094] Reference Figure 5 and Figure 6 A plunger pump includes a spin-repairable check valve, a power end assembly 6, and a hydraulic end assembly 7.

[0095] The hydraulic end assembly 7 is fixedly installed on the power end assembly 6. The hydraulic end assembly 7 has a pump chamber 71, a water inlet channel 72 and a water outlet channel 73. There are three pump chambers 71, and each pump chamber 71 can be detachably installed with a self-rotating repairable one-way valve. The water inlet channel 72 is connected to the side of each pump chamber 71 near the valve seat, and the water outlet channel 73 is connected to the side of each pump chamber 71 near the valve body. The water outlet channel 73 is provided with a one-way valve for controlling the unidirectional flow of fluid from the pump chamber 71 into the water outlet channel 73.

[0096] There are three plunger rods 61 corresponding to the pump chamber 71. One end of the plunger rod 61 is located in the pump chamber 71 near the valve body. The plunger rod 61 moves back and forth to push the fluid to be transported. When the two plunger rods 61 are close to the valve body, the plunger rod 61 corresponding to the middle position is away from the valve body.

[0097] When the power assembly 6 operates and drives the plunger rod 61 away from the valve body, a negative pressure is formed in the pump chamber 71 near the valve body. The fluid in the inlet channel 72 is drawn into the pump chamber 71 near the valve body through the self-repairable one-way valve. The plunger pump then moves closer to the valve body and squeezes the fluid to flow out unidirectionally from the outlet channel 73. The one-way valve prevents the fluid in the outlet channel 73 from being drawn back when the pump chamber 71 is under negative pressure. Through the suction and squeezing of the fluid by the plunger rod 61, the low-pressure fluid is converted into a high-pressure fluid and output.

[0098] Based on the same inventive concept, this invention provides a method for processing and applying a spin-repairable one-way valve.

[0099] A method for processing and applying a spin-repairable check valve includes the following steps:

[0100] Step 10: In response to the assembly signal, acquire pumping power, pump chamber size, and fluid information.

[0101] Assembly signal refers to the instruction signal that triggers the spin-repairable check valve to start the entire processing and assembly process; it is generated by the system receiving a start command triggered manually, such as when a worker presses the start button.

[0102] Pumping power refers to the output power of a plunger pump that requires the installation of a spin-repairable check valve; the pumping power is obtained by scanning the QR code with corresponding information on the corresponding plunger pump.

[0103] The pump chamber size refers to the geometric dimensions of the pump chamber 71 of the plunger pump that houses the spin-repairable check valve; the pump chamber size is obtained by scanning the QR code with corresponding information on the corresponding plunger pump.

[0104] Fluid information refers to the physical characteristics parameters of the medium flowing through the spin-repairable check valve; the fluid information is entered into the system by the operator according to the actual generation requirements before pressing the start button.

[0105] Step 11: Determine the target rotational speed based on fluid information.

[0106] The target rotation speed refers to the self-rotation speed required by the valve core 2 during normal operation. Based on the principle of fluid dynamics, the influence relationship between different fluid characteristic parameters on the power transmission efficiency and fluid resistance of the valve core 2's self-rotation is pre-stored to obtain the optimal working self-rotation speed of the valve core 2 that is highly adapted to the current fluid characteristics, which is used as the target rotation speed.

[0107] Step 12: Match the foundation slope with the pumping power and target speed.

[0108] The basic slope refers to the inclination angle of the inclined surface of the inclined block 211, which is initially matched by rotating the valve core 2 to the target speed based on the pumping power. The corresponding basic slope is found from the slope correspondence table based on the pumping power and the target speed. The slope correspondence table is a data table that records different pumping powers and target speeds and their corresponding basic slopes. It is obtained by technicians through preliminary testing and will not be elaborated here.

[0109] Step 13: Determine the valve core model and its corresponding bevel height based on the pump cavity dimensions.

[0110] The valve core model refers to the specification model of the valve core 2 that matches the installation dimensions and adaptation requirements of the pump cavity 71, selected according to the size of the matching pump cavity. The corresponding valve core model is found from the model correspondence table according to the pump cavity size. The model correspondence table is a data table that records different pump cavity sizes and their corresponding valve core models. It is obtained by the technicians through prior testing and will not be described in detail here.

[0111] The height of the oblique ridge refers to the structural height of the oblique ridge block 211 on the valve core 2; the height of the oblique ridge corresponds one-to-one with the valve core model, and can also be obtained from the model correspondence table.

[0112] Step 14: Determine the correction factor based on the height of the oblique edge and the fluid information.

[0113] The correction coefficient is a coefficient used to compensate for the influence of fluid characteristics and the structure of the oblique rib body on the actual working slope of the oblique rib. Based on different specifications of the oblique rib height of valve core 2 and the core parameters of fluid information, multiple sets of orthogonal experiments are designed in advance to test the deviation between the theoretical slope of the oblique rib and the actual adapted working slope under different combinations of oblique rib height and fluid information. All experimental data are fitted and analyzed to obtain a parameter library of oblique rib height, fluid information and correction coefficient, which can be directly matched and retrieved when used.

[0114] Step 15: Calculate and determine the slope of the oblique edge by combining the correction factor and the basic slope.

[0115] The slope of the oblique edge refers to the slope required for the oblique edge block 211 to rotate at the target speed based on the pumping power to drive the valve core 2; the slope of the oblique edge is obtained by multiplying the correction coefficient and the basic slope.

[0116] Step 16: Machining and assembly based on the bevel angle and valve core model.

[0117] Select the corresponding valve core 2 according to the valve core model and fix it in the processing station. Then, process the oblique block 211 of the valve core 2 based on the oblique angle. The processed valve core 2 that meets the standard is assembled in the corresponding pump chamber 71.

[0118] The inclined block 211 on the valve core 2 does not initially have an inclined surface, but is a surface perpendicular to the surface of the valve core 2. It needs to be machined later.

[0119] The machining process, based on the bevel angle and valve core model, includes the following steps:

[0120] Step 20: Set the speed range and oscillation threshold according to the target speed and the preset accuracy level.

[0121] The accuracy level refers to the accuracy judgment standard for the machining and assembly of valve core 2. Different levels correspond to different allowable ranges of process error. The accuracy level is set and entered into the system by the staff before startup based on the application scenario of the self-repairable check valve and the accuracy requirements of the matching pumping system.

[0122] The rotational speed range refers to the acceptable range of values ​​for the rotational speed of valve core 2; the specific setting method will be disclosed in detail in subsequent steps, and will not be repeated here.

[0123] The sway threshold refers to the maximum allowable radial sway amplitude during the self-rotation of valve core 2. The corresponding sway threshold is obtained by looking up the sway correspondence table according to the accuracy level. The sway correspondence table is a data table that records different accuracy levels and their corresponding sway thresholds. It is obtained by technicians through prior testing and will not be elaborated here.

[0124] Step 21: Determine the water-facing area by combining the valve core model and the slope of the bevel.

[0125] The water-facing area refers to the effective working area of ​​the inclined prism block 211 facing the fluid; the basic projected area of ​​the inclined prism block 211 is determined according to the valve core model, and then the water-facing area is obtained through geometric calculations in combination with the prism slope.

[0126] Step 22: Determine the water flow thrust based on pumping power and water-facing area.

[0127] Water flow thrust refers to the thrust exerted on the inclined surface of the inclined block 211 when the fluid flows through it. Based on the classical fluid dynamics thrust theory, combined with the structural characteristics of the inclined block 211, a thrust calculation model is established after collecting data through multiple sets of working condition simulation experiments. The data is pre-entered into the system, and the pumping power and the water-facing area are substituted into the thrust calculation model to obtain the corresponding water flow thrust.

[0128] Step 23: Set the verification parameters based on the water flow thrust and the slope of the inclined plane.

[0129] The verification parameters refer to the operating parameters used to perform air blowing verification on the processed beveled block 211. The air blowing pressure is set based on the water flow thrust, and the air blowing direction perpendicular to the bevel is set according to the bevel angle. The verification parameters are obtained by combining the air blowing pressure and the air blowing direction.

[0130] Step 24: Blow air based on the calibration parameters and collect the rotation speed and sway amplitude.

[0131] Multiple airflow nozzles are evenly distributed around the inclined block 211, and the direction of the airflow nozzles is set perpendicular to the inclined surface of the inclined block 211. Based on the blowing pressure in the verification parameters, air is blown onto the processed valve core 2. At this time, the valve core 2 is located on the verification station. The verification station simulates the working environment of the valve core 2 in advance and pushes the valve core 2 to squeeze the spring 3.

[0132] Rotation speed refers to the actual self-rotation speed of valve core 2 during the air blowing test of valve core 2; the rotation speed is obtained by real-time acquisition of the actual self-rotation state of valve core 2 by a speed detection sensor pre-installed at the test station.

[0133] The sway amplitude refers to the radial sway of valve core 2 during the air blowing test; the sway amplitude is obtained by real-time acquisition of the radial sway state of valve core 2 by a displacement detection sensor pre-installed at the test station.

[0134] Step 25: When the rotational speed falls within the rotational speed range and the oscillation amplitude is less than the oscillation threshold, the machining verification is completed.

[0135] If the rotational speed falls within the rotational speed range and the sway amplitude is less than the sway threshold, it means that the actual self-rotation speed of valve core 2 during the air blowing test is within the acceptable range and the radial sway does not exceed the maximum allowable value, that is, the machined valve core 2 is a qualified product.

[0136] After determining the slope of the oblique edge, the following steps are included:

[0137] Step 30: If the slope of the beveled edge is greater than the preset upper limit of the slope, the upper limit of the slope is used as the corrected slope of the beveled edge.

[0138] The upper limit of the slope refers to the maximum allowable angle for machining the inclined surface of the inclined block 211; it is determined by the staff through simulation testing based on the structural design requirements and working performance limits of the spin-repairable check valve and is pre-entered into the system.

[0139] If the slope of the bevel is greater than the upper limit of the slope, it means that the machining angle of the valve core 2 bevel calculated based on the correction coefficient and the basic slope exceeds the maximum allowable angle. It cannot be machined according to the set tilt angle. In this case, the upper limit of the slope can only be used as the corrected slope of the bevel for machining.

[0140] Step 31: Match the energizing current according to the corrected slope of the slant and the target rotational speed.

[0141] The energizing current refers to the current value energized for the spring 3 of the spin-repairable check valve; the specific matching method will be disclosed in subsequent steps and will not be elaborated here.

[0142] In this embodiment, a permanent magnet is provided inside the gasket 5, and the spring 3 is made of iron-chromium-cobalt permanent magnet alloy, which has good magnetic permeability, spring elasticity and fatigue resistance. After the spring 3 is energized through the pre-embedded circuit, the spring 3 forms an electromagnet and repels the permanent magnet inside the gasket 5, so that the spring 3 and the gasket 5 have a force that moves them away from each other, thereby reducing the friction between the spring 3 and the gasket 5. The pre-embedded circuit is adapted to the working environment inside the one-way valve.

[0143] Step 32: Determine the energizing parameters based on the energizing current and the preset energizing position.

[0144] The energized position refers to the port position that is electrically connected to both ends of the spring 3. In this embodiment, the energized position is the port position of the pre-embedded circuit, which is set and entered into the system in advance by the staff.

[0145] The energizing parameters refer to the complete set of process parameters for energizing spring 3; the positive and negative poles of the control power supply equipment are connected to the two connection terminals of the energized position respectively, and the power supply is based on the energizing current, which is the energizing parameters.

[0146] Step 33: When the running signal is detected, the energizing parameters are synchronously executed to energize spring 3.

[0147] The operating signal refers to the working trigger signal that the fluid begins to flow through the check valve; the trigger signal of the fluid flowing through the check valve is collected by the flow sensor that is preset at the valve core 2, and the energizing parameters are executed synchronously.

[0148] After the check valve is installed, the flow sensor is electrically connected to the external power supply. When the plunger pump is running normally, the flow sensor detects the fluid passing through and triggers the operation signal, and the power supply supplies power to spring 3.

[0149] The current matching method includes the following steps:

[0150] Step 40: Collect the pre-compression force of spring 3 and washer 5 to obtain the resistance torque coefficient and magnetic circuit parameters.

[0151] The pre-compression force refers to the pre-compression force applied by the spring 3 to the gasket 5 in the unpowered state; the pre-compression force is obtained by measuring the compression state of the spring 3 and the gasket 5 in the unpowered state using a pressure testing instrument.

[0152] The resistance torque coefficient is a comprehensive coefficient that characterizes the magnitude of resistance during the self-rotation of the valve core 2. It is calculated by multiplying the dynamic friction coefficient between the spring 3 and the gasket 5 and the rotational force arm of the spring 3. The dynamic friction coefficient and the rotational force arm are both measured and collected in advance by the staff and entered into the system. When in use, the resistance torque coefficient is directly read and calculated.

[0153] Magnetic circuit parameters refer to the characteristic parameters of the magnetic circuit related to the adjustment of the spring 3 by energizing it, including the effective magnetic area between the spring 3 and the shim 5, the number of spring coils, and the spring length. The effective magnetic area, the number of spring coils, and the spring length are all measured and collected in advance by the staff and entered into the system, and can be directly read when in use.

[0154] Step 41: Determine the target torque based on the upper limit of the slope and the target rotational speed.

[0155] The target torque refers to the torque between the valve core 2 (which uses the upper limit of the slope as the slope) and the spring 3 when the valve core 2 reaches the target speed. The target torque is obtained by looking up the upper limit of the slope and the target speed from the torque correspondence table. The torque correspondence table is a data table that records different upper limits of the slope and target speeds and their corresponding target torques. It is obtained by technicians through prior testing and will not be elaborated here.

[0156] Step 42: Determine the target clamping force by combining the target torque and the resistance torque coefficient.

[0157] The target clamping force refers to the clamping force applied by the spring 3 to enable the valve core 2 to overcome the spin resistance and maintain the target rotation speed; the target clamping force is obtained by quotienting the target torque and the resistance torque coefficient.

[0158] Step 43: Calculate and determine the difference in clamping force based on the pre-clamping force and the target clamping force.

[0159] The clamping force difference refers to the amount of clamping force that the spring 3 needs to reduce on the washer 5, that is, the magnitude of the repulsive force between the energized spring 3 and the washer 5; it is obtained by calculating the difference between the pre-clamping force and the target clamping force.

[0160] Step 44: Determine the energizing current by combining the magnetic circuit parameters and the difference in clamping force.

[0161] Substituting the magnetic circuit parameters and the difference in clamping force into the calculation formula, the current is obtained. The calculation formula is as follows: F 磁 The value represents the difference in clamping force, μ0 represents the permeability of free space, μ0 is a physical constant, N is the number of spring coils, I is the current flowing through it in amperes, S is the effective magnetic area in square meters, and l is the spring length in meters.

[0162] The method for setting the speed range includes the following steps:

[0163] Step 50: Determine the deviation coefficient based on the pumping power and accuracy class.

[0164] The deviation coefficient is a proportional coefficient used to set the upper and lower limits of the speed range. The higher the accuracy level, the smaller the deviation coefficient. The corresponding deviation coefficient can be found in the deviation correspondence table according to the pumping power and accuracy level. The deviation correspondence table is a data table that records different pumping powers and accuracy levels and their corresponding deviation coefficients. It is obtained by technicians through prior testing and will not be described in detail here.

[0165] Step 510: If the slope of the slant is inconsistent with the upper limit of the slope, the target rotational speed is taken as the midpoint of the interval.

[0166] If the slope of the slant edge is inconsistent with the upper limit of the slope, it means that the slope of the slant edge at this time is determined by combining the correction coefficient and the basic slope, without correction. The speed range can be directly calculated based on the corresponding target speed.

[0167] The midpoint of the range refers to the middle reference value of the speed range, which is the core basis for setting the upper and lower limits of the speed range; at this time, the target speed is directly used as the midpoint of the range.

[0168] Step 511: If the slope of the inclined plane is consistent with the upper limit of the slope, determine the expected rotational speed based on the upper limit of the slope and the pumping power.

[0169] The slope of the oblique edge is consistent with the upper limit of the slope, which means that the slope of the oblique edge at this time is the corrected slope of the oblique edge. It is necessary to energize spring 3 to reach the target speed. However, when it is not energized, the actual speed is less than the target speed, and the target speed cannot be used as the midpoint of the interval.

[0170] The expected speed refers to the speed of valve core 2 when the slope of the sloping edge is at the upper limit of the sloping edge and the valve is not energized. Similar to the above calculation process of finally obtaining the slope of the sloping edge based on the pumping power and the target speed, the upper limit of the slope is used as the slope of the sloping edge to deduce the corresponding target speed, which is the expected speed.

[0171] Step 52: Use the expected rotational speed as the midpoint of the interval.

[0172] After correcting the slope of the oblique edge, the expected rotational speed is used as the midpoint of the range.

[0173] If the slope of the inclined plane, calculated by combining the correction factor and the basic slope, happens to be consistent with the upper limit of the slope, then the expected speed is consistent with the target speed, and the expected speed can also be used as the midpoint of the interval.

[0174] Step 53: Determine the speed range based on the deviation coefficient and the median of the interval.

[0175] The fluctuation amount is obtained by multiplying the deviation coefficient with the median of the interval. The upper and lower limits of the interval are obtained by summing the median of the interval with the fluctuation amount and taking the difference, thus obtaining the speed range.

[0176] After collecting the rotation speed and sway amplitude, the following steps are also included:

[0177] Step 60: If the swaying amplitude is less than the swaying threshold and the rotation speed does not fall within the rotation speed range, determine the fluctuation threshold and intensity threshold according to the accuracy requirements.

[0178] If the sway amplitude is less than the sway threshold and the rotation speed does not fall within the rotation speed range, it means that the radial sway meets the accuracy requirements. However, if the actual rotation speed exceeds the acceptable range, it is determined that there is an abnormality and further verification is required.

[0179] The fluctuation threshold refers to the maximum permissible value of turbulent fluctuations determined according to accuracy requirements.

[0180] The intensity threshold refers to the maximum allowable value of turbulence intensity determined according to accuracy requirements.

[0181] Both the fluctuation threshold and intensity threshold are obtained from the turbulence correspondence table according to the accuracy requirements. The turbulence correspondence table is a data table that records different accuracy requirements and their corresponding fluctuation thresholds and intensity thresholds. It is obtained by technicians through prior experiments and will not be elaborated here.

[0182] Step 61: Set the acquisition number and its corresponding acquisition path based on the valve core model and rotation speed.

[0183] The acquisition number is a unique number used to identify the acquisition point of turbulence intensity. The acquisition point is set according to the midpoint between two adjacent oblique blocks 211, and the turbulence detection sensors corresponding to the acquisition point are numbered sequentially to obtain the acquisition number.

[0184] The acquisition path refers to the specific route and location for acquiring turbulence intensity. The acquisition path is obtained by drawing an arc along the rotation direction of valve core 2 with the center position corresponding to the valve core model as the midpoint and the acquisition point as the arc. The acquisition path corresponds one-to-one with the acquisition number.

[0185] Step 62: Collect turbulence intensity according to the collection number and collection path.

[0186] Turbulence intensity refers to the strength of turbulence when airflow impacts the inclined surface of the inclined block 211 and is pushed towards the collection point by the reaction force; the control robot arm moves multiple turbulence detection sensors to the collection point respectively, and the data collected along the collection path is the turbulence intensity.

[0187] Based on the preset acquisition time and acquisition interval, continuous acquisition is performed to obtain multiple turbulence intensities under the same acquisition number.

[0188] Step 63: Based on the same acquisition number, determine the turbulence fluctuation by turbulence intensity.

[0189] Turbulent fluctuation refers to the fluctuation and change in turbulence intensity. The fluctuation and change of all turbulence intensities collected from the same sampling point are calculated by statistically analyzing the data.

[0190] Step 64: When all turbulent fluctuations are less than the fluctuation threshold, calculate the average intensity based on the turbulence intensity.

[0191] The turbulent fluctuations were all less than the fluctuation threshold, indicating that the turbulent state corresponding to all the acquisition numbers in this experiment remained stable and no abnormalities occurred, which can be further verified.

[0192] Average intensity refers to the average data of turbulence intensity; the average value of the data set is obtained by performing an arithmetic mean operation on all turbulence intensities collected at the same sampling point.

[0193] Step 65: Define the collection number corresponding to the average intensity that is greater than the intensity threshold as the anomaly number.

[0194] An anomaly number refers to the collection number corresponding to an average intensity greater than the intensity threshold. The average intensity corresponding to all collection numbers is compared with the intensity threshold, and the collection numbers whose average intensity is greater than the threshold are marked as an anomaly number.

[0195] Step 66: Grind based on the anomaly number, bevel angle, and valve core model.

[0196] If the average intensity is greater than the intensity threshold, it means that the turbulence intensity at that location exceeds the maximum allowable value. It is determined that the inclined surface of the corresponding inclined block 211 is too rough, resulting in uneven impact force of the airflow on the inclined block 211. The inclined surface needs to be polished.

[0197] The grinding tilt angle is set according to the bevel angle, and the grinding area and area are set according to the valve core model, thus integrating them into grinding parameters for grinding processing.

[0198] After calculating the average strength, the following steps are also included:

[0199] Step 70: If the average strength is not greater than the strength threshold, collect and verify the clamping force.

[0200] The average intensity is not greater than the intensity threshold, which means that the smoothness of the inclined surface of the inclined block 211 meets the standard and will not cause uneven impact force of airflow. Further verification is required.

[0201] The verification clamping force refers to the clamping force of spring 3 on the processed valve core 2 in the verification station; the verification clamping force is obtained by measuring the clamping state of spring 3 and gasket 5 through a pressure testing instrument pre-installed in the verification station.

[0202] Step 71: When the verification clamping force is greater than the pre-clamping force, calculate the verification difference by combining the verification clamping force and the pre-clamping force.

[0203] If the clamping force is greater than the pre-clamping force, it means that the spring 3 at the calibration station has applied too much clamping force to the valve core 2, and this situation is determined to be the cause of the abnormal problem.

[0204] The verification difference refers to the deviation between the verification clamping force and the pre-clamping force; it is calculated by subtracting the verification clamping force from the pre-clamping force.

[0205] Step 72: Determine the verification current based on the verification difference.

[0206] The verification current refers to the current supplied to the spring 3 to ensure that the spring 3 applies the correct clamping force to the processed valve core 2 at the verification station. Similar to the matching method of the energizing current, the verification difference is used as the clamping force difference to calculate the verification current.

[0207] Step 73: Based on the verification current and the preset verification power-on position, power on and re-blow air to collect data.

[0208] The verification of the energized position refers to the connection position in the verification station where current is passed through both ends of the spring 3. Since no fluid needs to pass through the verification station and no circuit is pre-embedded, the verification of the energized position is the position of both ends of the spring 3, which is the same as the connection position of the pre-embedded circuit on the spring 3 in actual operation.

[0209] The current is applied to the calibration energized position based on the calibration current, so that there is a repulsive force between the spring and the gasket at the calibration station, thereby reducing the clamping force of the spring on the valve core to the pre-clamping force, and the air blowing is re-collected.

[0210] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A method for processing and applying a spin-repairable check valve, applicable to a spin-repairable check valve and a plunger pump having a spin-repairable check valve, characterized in that, The spin-repairable check valve includes a valve core (2) for opening and closing the flow channel, a valve seat (1) that seals with the valve core (2), and a spring (3) that provides preload to the valve core (2). The valve core (2) is provided with a spin structure (21) for rotating the valve core (2) as the fluid passes through. The spin structure (21) includes several oblique blocks (211), which are slidably connected to the valve seat (1). One side of the oblique block (211) is provided with an inclined surface for guiding the fluid to make oblique impact. A water channel (212) is formed between adjacent oblique blocks (211) for the fluid to pass through when the valve core (2) and the valve seat (1) are separated. There is an opening and closing channel between the valve core (2) and the valve seat (1) for fluid to pass through, and the material hardness of the valve core (2) at the opening and closing channel is higher than that of the valve seat (1). A gasket (5) is provided between the valve core (2) and the spring (3) to reduce the circumferential resistance of the spring (3) to the valve core (2) when the valve core (2) rotates. The gasket (5) is made of a material with wear-resistant and self-lubricating properties. The plunger pump also includes a power end assembly (6) having a plunger rod (61) and a hydraulic end assembly (7) for cooperating with the power end assembly (6) to convert low-pressure fluid into high-pressure fluid output. The hydraulic end assembly (7) is provided with a pump chamber (71) for mounting a spin-repairable check valve, an inlet channel (72) for guiding low-pressure fluid into the pump chamber (71), and an outlet channel (73) for guiding high-pressure fluid out. The valve seat and valve body are detachably installed inside the pump chamber (71). One end of the inlet channel (72) is connected to the side of the pump chamber (71) near the valve seat, and the outlet channel (73) is connected to the side of the pump chamber (71) near the valve body. One end of the plunger rod (61) is located in the pump chamber (71) near the valve body, and the plunger rod (61) is used to reciprocate to drive fluid delivery; Also includes: Step 10: In response to the assembly signal, acquire pumping power, pump chamber size, and fluid information; Step 11: Determine the target rotational speed based on fluid information; Step 12: Match the foundation slope with the pumping power and target rotational speed; Step 13: Determine the valve core model and its corresponding bevel height based on the pump cavity dimensions; Step 14: Determine the correction factor based on the height of the inclined plane and fluid information; Step 15: Calculate and determine the slope of the inclined edge by combining the correction factor and the base slope; Step 16: Machining and assembly based on the bevel angle and valve core model.

2. The processing and application method of a spin-repairable one-way valve according to claim 1, characterized in that, After processing based on the bevel angle and valve core model, the following are included: Step 20: Set the speed range and oscillation threshold according to the target speed and the preset accuracy level; Step 21: Determine the water-facing area based on the valve core model and the slope of the beveled edge; Step 22: Determine the water flow thrust based on pumping power and upstream area; Step 23: Set the verification parameters based on the water flow thrust and the slope of the inclined plane; Step 24: Based on the calibration parameters, blow air and collect the rotation speed and sway amplitude; Step 25: When the rotational speed falls within the rotational speed range and the oscillation amplitude is less than the oscillation threshold, the machining verification is completed.

3. The processing and application method of a spin-repairable one-way valve according to claim 2, characterized in that, After determining the slope of the oblique edge, the following is included: Step 30: If the slope of the beveled edge is greater than the preset upper limit of the slope, the upper limit of the slope is used as the corrected slope of the beveled edge. Step 31: Match the energizing current according to the corrected slope of the inclined plane and the target rotational speed; Step 32: Determine the energizing parameters based on the energizing current and the preset energizing position; Step 33: When the running signal is detected, the energizing parameters are synchronously applied to the spring (3) to energize it.

4. The processing and application method of a spin-repairable one-way valve according to claim 3, characterized in that, Current matching methods include: Step 40: Collect the pre-compression force of spring (3) and washer (5) to obtain the resistance torque coefficient and magnetic circuit parameters; Step 41: Determine the target torque based on the upper limit of the slope and the target rotational speed; Step 42: Determine the target clamping force by combining the target torque and the resistance torque coefficient; Step 43: Calculate and determine the difference in clamping force based on the pre-clamping force and the target clamping force; Step 44: Determine the energizing current by combining the magnetic circuit parameters and the difference in clamping force.

5. The processing and application method of a spin-repairable one-way valve according to claim 3, characterized in that, Methods for setting the speed range include: Step 50: Determine the deviation coefficient based on the pumping power and accuracy class; Step 510: If the slope of the inclined plane is inconsistent with the upper limit of the slope, take the target rotational speed as the midpoint of the interval; Step 511: If the slope of the inclined plane is consistent with the upper limit of the slope, determine the expected rotational speed based on the upper limit of the slope and the pumping power; Step 52: Use the expected rotational speed as the midpoint of the interval; Step 53: Determine the speed range based on the deviation coefficient and the median of the interval.

6. The processing and application method of a spin-repairable one-way valve according to claim 4, characterized in that, After collecting the rotation speed and sway amplitude, the following is also included: Step 60: If the swaying amplitude is less than the swaying threshold and the rotation speed does not fall within the rotation speed range, determine the fluctuation threshold and intensity threshold according to the accuracy requirements; Step 61: Set the data acquisition number and its corresponding data acquisition path based on the valve core model and rotation speed; Step 62: Collect turbulence intensity according to the collection number and collection path; Step 63: Based on the same acquisition number, determine the turbulence fluctuation by turbulence intensity; Step 64: When all turbulent fluctuations are less than the fluctuation threshold, calculate the average intensity based on the turbulence intensity; Step 65: Define the acquisition number corresponding to the average intensity that is greater than the intensity threshold as the abnormal number; Step 66: Grind based on the anomaly number, bevel angle, and valve core model.

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