Feed valve resistant to abrasion and swing

Abstract

The invention discloses a feeding valve capable of resisting abrasion and swinging. The feeding valve comprises a feeding valve body, a valve element and a swinging structure. A material channel is arranged in the feeding valve main body, the valve core is movably arranged in the material channel and is used for controlling the material flow, a rotating shaft is arranged on the swinging structure, the swinging structure is connected with the valve core through the rotating shaft, and the power device is connected with the rotating shaft and is used for driving the rotating shaft to drive the valve core to swing. Compared with the prior art, the wear resistance is improved, and the service life of the valve is remarkably prolonged through the multi-layer composite coating (hard alloy and hard chromium plating) on the valve element and the silicon nitride inner wall coating of the material channel. And the double-hinge assembly is combined with the buffer spring, so that impact wear can be reduced, and high-pressure working conditions can be adapted. And intelligent maintenance: a wear sensor is linked with a control system, so that predictive maintenance can be realized. And rapid replacement is achieved, the valve element can be rapidly replaced through the modular valve element design, and therefore the downtime is shortened.

Description

Technical Field

[0001] This invention belongs to the field of mechanical valve control technology, specifically relating to a feed valve with wear-resistant oscillation capability. Background Technology

[0002] In the production of PET and PTA, the feed valves are in long-term contact with corrosive media and highly abrasive materials, which poses a challenge to the materials used in the feed valves.

[0003] Chinese utility model patent CN217375714U provides a feeding swing valve, including a hopper, a mounting shell installed on the top of the hopper, and a discharge pipe installed at the bottom of the hopper. The top of the mounting shell is respectively equipped with a feeding pipe and a balance valve, and the top of the hopper is provided with a feeding balance swing valve mechanism. The other ends of two driven rods pass through the feeding pipe and the balance valve respectively and are fixedly connected to one end of a connecting block. Under the action of the sealing seat, the rotation of the driven rods is made more stable. Both swing valves are fitted and connected to the inner walls of the feeding pipe and the balance valve, thereby changing the swing valve in the feeding pipe and the balance valve from two actuators to one actuator.

[0004] The above-mentioned solutions and existing technologies have the following drawbacks: 1. Insufficient wear resistance: Traditional valve cores are made of ordinary steel, which is prone to rapid wear due to material erosion and chemical corrosion, requiring frequent replacement. 2. Poor stability of the swing structure: Existing swing structures mostly adopt a single hinge design, which is prone to deformation under high-pressure conditions, leading to inflexible opening and closing or sealing failure. 3. High maintenance costs: Replacing worn parts requires stopping the machine and disassembling the entire valve, affecting production efficiency. 4. Insufficient sealing performance: Gaps easily form between the swing structure and the valve body due to wear, leading to material leakage.

[0005] Therefore, there is an urgent need for a feed valve that combines high wear resistance, stable oscillation control, and easy maintenance. Summary of the Invention

[0006] In view of the problems mentioned in the background art, the purpose of the present invention is to provide a feed valve with wear-resistant oscillation, which has the characteristics of high wear resistance, stable oscillation control and easy maintenance.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0008] A feed valve with wear-resistant oscillation capability includes a feed valve body, a valve core, and an oscillation structure;

[0009] The feed valve body has a material channel inside, and the valve core is movably disposed in the material channel. The valve core is used to control the material flow rate. The swing structure has a rotating shaft, which is connected to the valve core. It also includes a power device, which is connected to the rotating shaft and is used to drive the rotating shaft to swing the valve core.

[0010] Further specifying, the valve core surface is sequentially connected with a hard alloy base layer and a hard chrome plating layer.

[0011] Further specified, the thickness of the cemented carbide base layer is 2-5 mm, and the thickness of the hard chromium plating layer is 0.1-0.3 mm.

[0012] Further specifying, the swing structure includes a double hinge assembly and a buffer spring. The double hinge assembly includes a first hinge and a second hinge. The first hinge and the second hinge are coiled and wound together. The first hinge is connected to one side of the rotation shaft, and the second hinge is connected to one side of the feed valve body through the buffer spring.

[0013] Furthermore, the contact surfaces of the first hinge and the second hinge are provided with a ceramic coating.

[0014] Furthermore, a flexible sealing ring is provided between the main body of the feed valve and the valve core, and the sealing ring is made of fluororubber.

[0015] Further, it also includes a wear sensor and a control system, which are communicatively connected. The wear sensor is disposed on the surface of the valve core and is used to monitor the wear thickness of the valve core in real time and feed it back to the control system.

[0016] Furthermore, the control system automatically adjusts the opening and closing frequency of the swing structure based on wear data fed back by the wear sensor.

[0017] Furthermore, the valve core is a modular design, and the valve core can be detachably connected to the swing structure via a snap-fit ​​structure.

[0018] Furthermore, the inner wall of the material channel of the feed valve body is coated with a silicon nitride coating.

[0019] The beneficial effects of this invention are:

[0020] Improved wear resistance: The multi-layer composite coating (hard alloy + hard chrome plating) on ​​the valve core and the silicon nitride inner wall coating of the material channel can significantly extend the valve's lifespan.

[0021] Enhanced oscillation stability: The combination of a double-hinge assembly and a buffer spring reduces impact wear and adapts to high-pressure conditions.

[0022] Intelligent maintenance: Wear sensors are linked with the control system to enable predictive maintenance.

[0023] Quick Replacement: The modular valve core design allows for quick valve core replacement, thereby reducing downtime. Attached Figure Description

[0024] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings;

[0025] Figure 1 This is a schematic diagram of an embodiment of the wear-resistant oscillation feed valve of the present invention;

[0026] Figure 2 This is a front view of an embodiment of the wear-resistant oscillation feed valve of the present invention;

[0027] Figure 3 This is a cross-sectional view (AA) of an embodiment of a wear-resistant oscillating feed valve according to the present invention.

[0028] Figure 4 This is a left view of an embodiment of a wear-resistant oscillating feed valve according to the present invention;

[0029] Figure 5 This is a schematic diagram of the internal structure of an embodiment of a wear-resistant oscillating feed valve according to the present invention;

[0030] Figure 6 This is a schematic diagram of the internal structure of an embodiment of a wear-resistant oscillating feed valve according to the present invention;

[0031] Figure 7 This is an enlarged cross-sectional view of an embodiment of a wear-resistant oscillating feed valve according to the present invention;

[0032] Figure 8 This is a schematic diagram of a double-hinge assembly structure of an embodiment of a wear-resistant oscillating feed valve according to the present invention.

[0033] The symbols of the main components are explained as follows: 1. Feed valve body, 2. Valve core, 3. Swing structure, 4. Material channel, 12. Wear sensor, 13. Silicon nitride coating, 21. Hard alloy base layer, 22. Hard chrome plating layer, 31. Rotating shaft, 32. Double hinge assembly, 33. Buffer spring, 33. First hinge, 330. Second hinge, 331. Detailed Implementation

[0034] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0035] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] like Figure 1 As shown, a feed valve with wear-resistant oscillation according to the present invention includes a feed valve body 1, a valve core 2 and an oscillation structure 3;

[0038] The feed valve body 1 has a material channel 4 inside, and the valve core 2 is movably disposed in the material channel 4. The valve core 2 is used to control the material flow rate. The swing structure 3 is provided with a rotating shaft 31, which is connected to the valve core 2. It also includes a power device, which is connected to the rotating shaft 31 and is used to drive the rotating shaft 31 to drive the valve core 2 to swing.

[0039] In the practical application of this embodiment, the surface of the valve core 2 is sequentially connected with a hard alloy base layer 21 and a hard chrome plating layer 22.

[0040] In the practical application of this embodiment, the thickness of the cemented carbide base layer 21 is 2-5 mm, and the thickness of the hard chromium plating layer 22 is 0.1-0.3 mm.

[0041] In the practical application of this embodiment, the swing structure 3 includes a double hinge assembly 32 and a buffer spring 33. The double hinge assembly 32 includes a first hinge 330 and a second hinge 331. The first hinge 330 and the second hinge 331 are coiled and wound together. The first hinge 330 is connected to one side of the rotating shaft 31, and the second hinge 331 is connected to one side of the feed valve body 1 through the buffer spring 33.

[0042] In the practical application of this embodiment, the contact surfaces of the first hinge 330 and the second hinge 331 are provided with a ceramic coating.

[0043] In the practical application of this embodiment, a flexible sealing ring is provided between the feed valve body 1 and the valve core 2, and the sealing ring is made of fluororubber.

[0044] In the practical application of this embodiment, a wear sensor 12 and a control system are also included. The wear sensor 12 and the control system are communicatively connected. The wear sensor 12 is disposed on the surface of the valve core 2 and is used to monitor the wear thickness of the valve core 2 in real time and feed it back to the control system.

[0045] In the practical application of this embodiment, the control system automatically adjusts the opening and closing frequency of the swing structure 3 based on the wear data fed back by the wear sensor 12.

[0046] In the practical application of this embodiment, the valve core 2 is a modular design, and the valve core 2 can be detachably connected to the swing structure 3 through a snap-fit ​​structure.

[0047] In the practical application of this embodiment, the inner wall of the material channel 4 of the feed valve body 1 is coated with a silicon nitride coating 13.

[0048] Working principle:

[0049] When the device is started, the swing structure 3 drives the rotating shaft 31 via the power unit, which in turn drives the valve core 2 to swing, thereby adjusting the opening of the material channel. By setting a hard alloy base layer 21 and a hard chrome plated layer 22 to resist material erosion, the ceramic coating can reduce friction between the double hinge components; by setting a flexible sealing ring to prevent leakage, the buffer spring 33 can absorb the swing impact.

[0050] The function of wear-resistant coating:

[0051] Hard alloy base layer 21 (thickness 2-5mm): resists direct impact from material particles.

[0052] Hard chrome plating 22 (thickness 0.1-0.3mm): Reduces chemical corrosion from acidic media through high surface hardness (HV≥800).

[0053] Silicon nitride inner wall coating 13 (thickness 50-100μm): reduces the coefficient of friction on the inner wall of the channel during material flow (coefficient of friction <0.1).

[0054] Wear sensor 12 in operation:

[0055] Data acquisition: The sensor uses a piezoelectric ceramic probe to collect the vibration spectrum of the valve core surface every 10 seconds (frequency range 1-10kHz).

[0056] Wear calculation: The coating thickness change is determined by spectrum analysis (such as FFT transformation). If the fluctuation amplitude is greater than 5dB, an alarm is triggered.

[0057] Maintenance reminder: When the cumulative wear amount in a quarter exceeds 80μm, the control system will automatically generate a maintenance report.

[0058] Detailed operation steps:

[0059] Equipment Inspection: Confirm that the silicon nitride coating 13 on the inner wall of the material channel of the feed valve body 1 is free from peeling by visual inspection or endoscopy. Check whether the thickness of the hard chrome plating layer 22 on the surface of the valve core 2 is ≥0.1mm (a portable coating thickness gauge can be used). Verify that the compression deformation rate of the fluororubber sealing ring 11 is <15% (this can be measured using a sealing ring compression scale).

[0060] Control system startup: Enter the initial parameters on the control system control panel: default oscillation frequency 15,000 times / hour, wear alarm threshold 0.2mm.

[0061] Detailed operating procedures:

[0062] Manual mode debugging: Switch to manual mode via the control panel, operate the rotating shaft 31 of the swing structure 3 to perform a ±30° swing test, observe whether the valve core 2 is stuck, and listen to the sound to judge the "click" locking sound.

[0063] Adjust the preload of the buffer spring 33 of the double hinge assembly 32 to ensure that the swing amplitude error is less than ±2° under a pressure of 10MPa.

[0064] Automatic mode operation: When switched to automatic mode, the control system automatically calculates the valve core opening based on the preset flow requirements. The swing structure 3 drives the conical valve core 2 to swing to the target angle of 45° via the rotating shaft 31, adjusting the material channel opening from 0% to 80%.

[0065] Example 1:

[0066] The valve is installed in the feed pipe, and the hard chrome plating layer 22 is set to a thickness of 0.3mm to balance wear resistance and processing cost. The hard chrome plating layer 22 of the valve core 2 is resistant to acidic media corrosion, and the double hinge assembly 32 ensures stable oscillation under 10MPa pressure.

[0067] Example 2:

[0068] The similarities between this embodiment and Embodiment 1 will not be repeated here. The difference is that the inner wall of the material channel 4 of the valve body is provided with a silicon nitride coating 13 to resist wear. The silicon nitride coating 13 has a spraying thickness of 50-100μm and is combined with gradient deposition technology to enhance the bonding strength and wear resistance. The hardness can reach more than 20GPa. The wear sensor 12 generates a maintenance report every quarter to remind the valve core to be replaced.

[0069] The control system types and maintenance report generation mechanisms are as follows:

[0070] The control system adopts a PLC (Programmable Logic Controller) and edge computing device linkage system, integrates real-time data from wear sensor 12, and uploads it to the cloud analysis platform through IoT module (such as MQTT protocol).

[0071] Maintenance report generation process:

[0072] Data Acquisition: Wear sensor 12 records the wear thickness of valve core 2 surface in real time through high-frequency vibration monitoring (sampling rate ≥10kHz) and current fluctuation analysis (±0.5mA baseline). When the wear of the coating on valve core 2 reaches 0.2mm, a primary warning is triggered; if the monthly offset is >0.8mA, the lubrication deterioration diagnosis program is started.

[0073] The maintenance report should include: quarterly cumulative wear (μm) and trend chart, historical data and adjustment records of oscillation frequency, seal compression deformation rate (threshold <15%), and maintenance recommendations (such as valve core replacement or lubrication schedule).

[0074] Example 3:

[0075] Rapid maintenance under high temperature conditions: The similarities between this embodiment and embodiment 1 will not be repeated. The difference is that the valve core 2 is detachably connected to the swing structure 3 through a snap-fit ​​structure. The modular valve core 2 can be replaced within 30 minutes through the snap-fit ​​structure without disassembling the pipeline.

[0076] The specific process for replacing modular valve core 2 is as follows:

[0077] 1. Shutdown and pressure relief: Close the feed valve and release the pipeline pressure to ensure safe operation.

[0078] 2. Disassemble the old valve core: Loosen the locking bolts of the snap-fit ​​structure (a 28.6mm hex wrench is required), and pull out the valve core 2 axially to avoid collision with the double hinge assembly 32 of the swing structure 3.

[0079] 3. Install the new valve core: Align the snap-fit ​​groove of the new valve core with the positioning pin set on the rotating shaft 31, and push it in until a "click" is heard to confirm locking; test the flexibility by manually swinging to ensure there is no jamming.

[0080] Example 4:

[0081] Intelligent frequency adjustment: The similarities between this embodiment and embodiment 1 will not be repeated. The difference is that when the wear sensor 12 detects that the hard chrome plating layer 22 is worn to 0.2mm, the control system will reduce the oscillation frequency by 20% to extend the remaining life.

[0082] The specific process of adjusting the oscillation frequency of the wear sensor:

[0083] Data input: Wear sensor 12 monitors the thickness of hard chrome plating layer 22 in real time and transmits it to PLC control system via a 4-20mA current signal.

[0084] Algorithm processing:

[0085] The wear sensor 12 in this embodiment is based on the ISO 10816-3 vibration standard. When a low-frequency fluctuation amplitude increase of >40% is detected, it is determined that the oscillation frequency needs to be reduced.

[0086] The control system linearly reduces the oscillation frequency from the default 15,000 times / hour to 12,000 times / hour (a 20% reduction), thereby reducing the impact wear of valve core 2.

[0087] After adjustment, the wear rate is continuously monitored. If the trend is stable, the new frequency is maintained; if it deteriorates, a level 2 shutdown warning is triggered.

[0088] Example 5:

[0089] Leakage prevention design: The similarities between this embodiment and embodiment 1 will not be repeated. The difference is that a fluororubber sealing ring is provided between the feed valve body 1 and the valve core 2. The fluororubber sealing ring can maintain elasticity in the range of -20℃ to 150℃ to prevent leakage.

[0090] Selection criteria and advantages of fluororubber seals:

[0091] Corrosion resistance: Fluororubber (FKM) has excellent stability against highly corrosive media and can withstand chemical environments with pH 1-14.

[0092] High temperature adaptability: Long-term operating temperature range is -20℃ to 250℃, short-term resistance is 300℃, suitable for high temperature conditions in reactors.

[0093] Mechanical properties: Compression deformation rate <10%, tear strength up to 20MPa, which is superior to nitrile rubber (NBR).

[0094] Maintenance costs: Although the unit price is higher, the lifespan is extended by 3-5 times, reducing downtime losses.

[0095] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A feed valve with wear-resistant oscillation capability, characterized in that: It includes the feed valve body (1), valve core (2) and swing structure (3); The feed valve body (1) has a material channel (4) inside, and the valve core (2) is movably disposed in the material channel (4). The valve core (2) is used to control the material flow rate. The swing structure (3) has a rotating shaft (31) and is connected to the valve core (2) through the rotating shaft (31). It also includes a power device, which is connected to the rotating shaft (31) and is used to drive the rotating shaft (31) to drive the valve core (2) to swing.

2. The feed valve with wear-resistant oscillation as described in claim 1, characterized in that: The valve core (2) has a hard alloy base layer (21) and a hard chrome plating layer (22) connected sequentially on its surface.

3. A feed valve with wear-resistant oscillation as described in claim 2, characterized in that: The thickness of the hard alloy base layer (21) is 2-5 mm, and the thickness of the hard chromium plating layer (22) is 0.1-0.3 mm.

4. A feed valve with wear-resistant oscillation as described in claim 1, characterized in that: The swing structure (3) includes a double hinge assembly (32) and a buffer spring (33). The double hinge assembly (32) includes a first hinge (330) and a second hinge (331). The first hinge (330) and the second hinge (331) are coiled and wound together. The first hinge (330) is connected to one side of the rotating shaft (31). The second hinge (331) is connected to one side of the feed valve body (1) through the buffer spring (33).

5. A feed valve with wear-resistant oscillation as described in claim 4, characterized in that: The contact surfaces of the first hinge (330) and the second hinge (331) are provided with a ceramic coating.

6. A feed valve with wear-resistant oscillation according to claim 1, characterized in that: A flexible sealing ring is provided between the main body (1) of the feed valve and the valve core (2), and the sealing ring is made of fluororubber.

7. A feed valve with wear-resistant oscillation as described in claim 1, characterized in that: It also includes a wear sensor (12) and a control system. The wear sensor (12) and the control system are connected in communication. The wear sensor (12) is disposed on the surface of the valve core (2) and is used to monitor the wear thickness of the valve core (2) in real time and feed it back to the control system.

8. A feed valve with wear-resistant oscillation according to claim 7, characterized in that: The control system automatically adjusts the opening and closing frequency of the swing structure (3) based on the wear data fed back by the wear sensor (12).

9. A feed valve with wear-resistant oscillation according to claim 1, characterized in that: The valve core (2) is a modular design, and the valve core (2) can be detachably connected to the swing structure (3) through a snap-fit ​​structure.

10. A feed valve with wear-resistant oscillation according to claim 1, characterized in that: The inner wall of the material channel (4) of the feed valve body (1) is coated with a silicon nitride coating (13).

Images