Hydraulic overpressure treatment device and hydraulic system

Abstract

The utility model discloses a kind of hydraulic overpressure processing device and hydraulic system, it is related to hydraulic processing technical field, including pressure sensor and pressure sleeve, guide plug is installed in the pressure port of pressure sleeve in the way of sliding seal, guide plug and pressure sleeve are enclosed to form the chamber with filling magnetorheological fluid, the coil groove of chamber outer wall is installed for adjusting the electromagnetic coil of magnetorheological fluid viscosity, so that the fluid pressure acting on guide plug is transferred to the sensing end of pressure sensor after magnetorheological fluid buffering. Through the solidification effect of magnetorheological fluid under magnetic field, the originally intense, high-frequency pressure alternating load is converted into smooth, gradual static load, so that the sensitive element of pressure sensor avoids the microplastic deformation and fatigue damage caused by stress cycle and overload, greatly attenuates the mechanical stress peak value transmitted to the sensitive element of pressure sensor from physical level, eliminates the signal drift phenomenon caused by element physical property decay from root.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic processing technology, and in particular to a hydraulic overpressure processing device and hydraulic system. Background Technology

[0002] The core load of high-pressure oil pipes is the circumferential stress generated by internal pressure. They are mostly manufactured using a cold-drawing process. During cold drawing, the plastic flow of the material is mainly along the axial direction, which makes the circumferential and radial strength and toughness of the oil pipe relatively weak.

[0003] Currently, the industry uses hydraulic overpressure treatment to achieve self-reinforcement. This involves applying a hydraulic load far exceeding the rated working pressure to the pipe, forcing the inner layer material of the pipe to undergo plastic deformation, forming a stable stress field of residual compressive stress in the inner layer and residual tensile stress in the outer layer, thereby improving the circumferential and radial performance of the oil pipe.

[0004] However, during the pressurization stage of hydraulic overpressure treatment, the hydraulic oil, after being pressurized by the booster, enters the ultra-high pressure cylinder. During the process of pressurizing the inside of the oil pipe, the pressure rise rate is adjusted in real time based on parameters such as pressure, temperature, and displacement collected by sensors at the ultra-high pressure cylinder. This causes gradual plastic deformation of the inner material of the oil pipe, which can easily lead to the following defects: When adjusting the pressure, the reciprocating motion of the booster and the change in fluid flow will cause periodic fluctuations and pressure oscillations in the oil pressure. This causes the sensitive elements of the sensor (strain gauge, piezoelectric crystal) to be subjected to severe alternating pressure loads. This long-term mechanical stress will cause microscopic plastic deformation of the sensitive elements, resulting in signal drift. In turn, it will cause poor uniformity of deformation of the oil pipe material and reduce the circumferential and radial performance of the oil pipe. Utility Model Content

[0005] One of the objectives of this invention is to improve the existing hydraulic overpressure treatment scheme, where the sensor is prone to signal drift due to long-term alternating loads, which affects the uniformity of oil pipe material deformation and thus reduces the circumferential and radial performance of the oil pipe.

[0006] The second objective of this utility model is to provide a hydraulic system.

[0007] To achieve one of the above objectives, the present invention adopts the following technical solution: a hydraulic overpressure treatment device, comprising a pressure sensor and a pressure-transforming sleeve connected to the pressure sensor, wherein the pressure-transforming sleeve is provided with a pressure port for introducing fluid pressure.

[0008] The hydraulic overpressure treatment device also includes a guide plug, which is installed in the pressure port in a sliding seal manner, and the guide plug is located in the pressure transmission path of the pressure sensor sensing end.

[0009] The guide plug and the transformer sleeve enclose a chamber filled with magnetorheological fluid.

[0010] The coil groove on the outer wall of the chamber is equipped with an electromagnetic coil for adjusting the viscosity of the magnetorheological fluid, so that the fluid pressure acting on the guide plug is buffered by the magnetorheological fluid and then transmitted to the sensing end of the pressure sensor.

[0011] In the above technical solution, during the operation of the hydraulic overpressure treatment device, the ultra-high pressure fluid enters from the pressure port of the transformer sleeve and acts directly on the guide plug, forcing the guide plug to undergo axial displacement along the pressure port. The movement of the guide plug compresses or disturbs the magnetorheological fluid filling the cavity formed by the guide plug and the transformer sleeve. At this time, the electromagnetic coil in the coil groove on the outer wall of the cavity adjusts according to the actual pressure, changing the magnetic field strength by altering the current, thereby changing the viscosity of the magnetorheological fluid.

[0012] Specifically, when the pressure signal output by the pressure sensor shows a sharp increase or high-frequency oscillation (i.e., a high rate of change), the magnetic field strength of the electromagnetic coil is enhanced by increasing the current in the electromagnetic coil. This causes the magnetic particles in the magnetorheological fluid to form chain-like or columnar structures, increasing its viscosity and even exhibiting semi-solid or near-solid mechanical properties. This state of the magnetorheological fluid significantly enhances the damping effect on the guide plug's movement, slows down the axial displacement velocity of the guide plug, effectively absorbs and attenuates the pressure shocks and high-frequency fluctuations brought by ultra-high pressure fluid, and transforms rapidly changing pressure fluctuations into smooth pressure transmission. This significantly reduces the rate of change of the pressure signal transmitted to the sensing end of the pressure sensor, making the pressure sensor less susceptible to severe pressure alternating loads.

[0013] Once the rate of change of the pressure signal output by the pressure sensor stabilizes, the current in the electromagnetic coil is reduced accordingly, weakening the magnetic field strength. At this point, the chain-like or columnar structure of the magnetic particles in the magnetorheological fluid gradually disintegrates and redisperses in the base fluid, reducing its viscosity and restoring it to a state with good fluidity. In this state, the magnetorheological fluid maintains a certain buffering capacity, preventing new fluctuations during pressure transmission, while also avoiding obstruction of the normal displacement of the guide plug due to excessive viscosity, ensuring that the pressure signal can be transmitted to the sensor's sensing end in a timely and accurate manner. Through this dynamic adjustment, the current in the electromagnetic coil always matches the changes in the pressure signal, providing strong damping buffering during pressure fluctuations and maintaining appropriate pressure transmission efficiency when the pressure is stable.

[0014] The beneficial effects of this utility model are: This invention utilizes the solidification effect of magnetorheological fluid under a magnetic field to transform the originally intense, high-frequency alternating pressure load into a stable, gradual static load. This prevents the sensitive element of the pressure sensor from microscopic plastic deformation and fatigue damage caused by stress cycles and overload. From a physical perspective, it greatly attenuates the peak mechanical stress transmitted to the sensitive element of the pressure sensor, thus eliminating the signal drift phenomenon caused by the decay of the physical properties of the element.

[0015] The buffered pressure signal noise is significantly reduced and the waveform is smooth, ensuring a good linear correspondence between the pressure sensor output value and the actual pressure change in the oil pipe, providing a high-fidelity feedback signal for precise control of the overpressure treatment process.

[0016] In addition, during the pressure stabilization phase, the magnetorheological fluid can gradually restore its fluidity, which maintains the basic buffering capacity to prevent new fluctuations and ensures efficient transmission of pressure signals.

[0017] Furthermore, in this embodiment of the invention, the pressure sensor includes a housing and a pressure-sensing component encapsulated within the housing and constituting the sensing end. The pressure-sensing component includes an elastic diaphragm, a strain gauge, and a piezoelectric crystal.

[0018] The periphery of the elastic diaphragm is fixedly connected to the shell.

[0019] The strain gauge is attached to the side of the elastic diaphragm facing away from the guide plug.

[0020] The piezoelectric crystal is attached to the groove on the side of the strain gauge or the elastic diaphragm facing away from the guide plug.

[0021] Furthermore, in this embodiment of the invention, the plane of the elastic diaphragm facing the guide plug constitutes the pressure receiving surface of the sensing end, and the pressure receiving surface is opposite to and spaced apart from or in direct contact with the end of the guide plug.

[0022] Furthermore, in this embodiment of the invention, the electromagnetic coil is electrically connected to an external control circuit, which is configured to dynamically adjust the current of the electromagnetic coil according to the rate of change of the received pressure signal, thereby changing the viscosity of the magnetorheological fluid.

[0023] Furthermore, in this embodiment of the invention, the chamber includes a narrow slit channel and a wide slit channel that are interconnected.

[0024] Furthermore, in this embodiment of the invention, the transformer sleeve is made of a magnetically conductive material, which constitutes part of the magnetic circuit of the electromagnetic coil. Alternatively, the transformer sleeve is made of a non-magnetically conductive material, and a magnetically conductive core is embedded in the slot of the electromagnetic coil.

[0025] Furthermore, in this embodiment of the present invention, the bottom inner cavity of the transformer sleeve is provided with an electromagnetic shielding structure. The electromagnetic shielding structure is sealed by a sealing ring outside the bottom inner cavity of the transformer sleeve. The electromagnetic shielding structure includes a metal shielding mesh and ferrite absorbing material filled in its mesh.

[0026] Furthermore, in this embodiment of the invention, the pressure sensor and the transformer sleeve are detachably connected by a threaded pair, and the connection is sealed by a sealing ring.

[0027] Furthermore, in this embodiment of the invention, the magnetorheological fluid includes a silicone oil-based fluid, carbonyl iron powder particles uniformly dispersed therein, and additives for preventing particle sedimentation.

[0028] To achieve the second objective mentioned above, the present invention adopts the following technical solution: a hydraulic system comprising a connected ultra-high pressure cylinder and a booster, wherein the hydraulic system is equipped with a hydraulic overpressure treatment device as described in one objective of the present invention, and the pressure port of the hydraulic overpressure treatment device is connected to the cavity of the ultra-high pressure cylinder. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the hydraulic overpressure treatment device according to an embodiment of the present invention.

[0030] 10. Pressure sensor; 11. Elastic diaphragm; 12. Strain gauge; 13. Piezoelectric crystal; 20. Transformer sleeve; 21. Pressure port; 22. Guide plug; 23. Chamber; 24. Electromagnetic coil; 25. Electromagnetic shielding structure. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," and "horizontal," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model 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 this utility model. Furthermore, the terms "a," "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] For purposes of simplicity and illustration, the principles of the embodiments are described primarily by way of example. In the following description, numerous specific details are set forth to provide a thorough understanding of the embodiments. However, it will be apparent to those skilled in the art that these embodiments may not be limited to these specific details in practice. In some instances, the structure of the hydraulic overpressure treatment device has not been described in detail to avoid unnecessarily obscuring these embodiments. Furthermore, all embodiments can be used in combination with each other. Example

[0035] It should be noted that the accompanying drawings are part of the content of the instruction manual. The structural shapes, connections, fits, and positional relationships that can be clearly seen in the accompanying drawings should all be understood as part of the content of the instruction manual.

[0036] A hydraulic overpressure treatment device, such as Figure 1 As shown, it includes a pressure sensor 10 and a transformer sleeve 20 connected to the pressure sensor 10. The transformer sleeve 20 is provided with a pressure port 21 for introducing fluid pressure.

[0037] The hydraulic overpressure treatment device also includes a guide plug 22, which is installed in the pressure port 21 in a sliding seal manner, and the guide plug 22 is located in the pressure transmission path of the sensing end of the pressure sensor 10.

[0038] The guide plug 22 and the transformer sleeve 20 enclose a chamber 23 filled with magnetorheological fluid.

[0039] An electromagnetic coil 24 for adjusting the viscosity of the magnetorheological fluid is installed in the coil groove on the outer wall of the chamber 23, so that the fluid pressure acting on the guide plug 22 is transmitted to the sensing end of the pressure sensor 10 after being buffered by the magnetorheological fluid.

[0040] Detailed Implementation: When the hydraulic overpressure treatment device is operating, the ultra-high pressure fluid enters from the pressure port 21 of the transformer sleeve 20 and acts directly on the guide plug 22, forcing the guide plug 22 to undergo axial displacement along the pressure port 21. The movement of the guide plug 22 compresses or disturbs the magnetorheological fluid filling the chamber 23 formed by it and the transformer sleeve 20. At this time, the electromagnetic coil 24 in the coil groove on the outer wall of the chamber 23 will adjust according to the actual pressure, changing the magnetic field strength by changing the current, thereby changing the viscosity of the magnetorheological fluid.

[0041] Specifically, when the pressure signal output by the pressure sensor 10 shows a sharp increase or high-frequency oscillation (i.e., a high rate of change), the magnetic field strength of the electromagnetic coil 24 is enhanced by increasing the current in the electromagnetic coil 24. This causes the magnetic particles in the magnetorheological fluid to form chain-like or columnar structures, increasing its viscosity and even exhibiting semi-solid or near-solid mechanical properties. This state of the magnetorheological fluid significantly enhances the damping effect on the movement of the guide plug 22, slows down the axial displacement velocity of the guide plug 22, effectively absorbs and attenuates the pressure shock and high-frequency fluctuations brought by the ultra-high pressure fluid, and transforms the rapidly changing pressure fluctuations into smooth pressure transmission. This significantly reduces the rate of change of the pressure signal transmitted to the sensing end of the pressure sensor 10, making the pressure sensor 10 less susceptible to severe pressure alternating loads.

[0042] Once the rate of change of the pressure signal output by the pressure sensor 10 stabilizes, the current in the electromagnetic coil 24 is reduced accordingly, weakening the magnetic field strength. At this time, the chain-like or columnar structure of the magnetic particles in the magnetorheological fluid gradually disintegrates and redisperses in the base fluid, reducing its viscosity and restoring it to a state with good fluidity. In this state, the magnetorheological fluid maintains a certain buffering capacity to prevent new fluctuations during pressure transmission, while also preventing excessive viscosity from hindering the normal displacement of the guide plug 22, ensuring that the pressure signal can be transmitted to the sensing end of the pressure sensor in a timely and accurate manner. Through this dynamic adjustment, the current in the electromagnetic coil 24 always matches the changes in the pressure signal, providing strong damping buffering during pressure fluctuations and maintaining appropriate pressure transmission efficiency when the pressure is stable.

[0043] The advantage of this invention is that, through the solidification effect of magnetorheological fluid under a magnetic field, the originally intense and high-frequency alternating pressure load is converted into a stable and gradual static load. This prevents the sensitive element of the pressure sensor 10 from microscopic plastic deformation and fatigue damage caused by stress cycles and overload. It greatly attenuates the peak mechanical stress transmitted to the sensitive element of the pressure sensor 10 from a physical perspective, and eliminates the signal drift phenomenon caused by the decay of the physical properties of the element from the root.

[0044] The buffered pressure signal noise is significantly reduced and the waveform is smooth, ensuring a good linear correspondence between the output value of pressure sensor 10 and the actual pressure change in the oil pipe, providing a high-fidelity feedback signal for precise control of the overpressure treatment process.

[0045] In addition, during the pressure stabilization phase, the magnetorheological fluid can gradually restore its fluidity, which maintains the basic buffering capacity to prevent new fluctuations and ensures efficient transmission of pressure signals.

[0046] Preferably, such as Figure 1 As shown, the pressure sensor 10 includes a housing and a pressure-sensing component encapsulated within the housing and constituting the sensing end. The pressure-sensing component includes an elastic diaphragm 11, a strain gauge 12, and a piezoelectric crystal 13.

[0047] The periphery of the elastic diaphragm 11 is fixedly connected to the shell.

[0048] The strain gauge 12 is attached to one side of the elastic diaphragm 11, opposite to the guide plug 22.

[0049] The piezoelectric crystal 13 is attached to the groove on the side opposite to the guide plug 22 of the strain gauge 12 or the elastic diaphragm 11.

[0050] Pressure, buffered by a magnetorheological fluid, acts on the elastic diaphragm 11, causing it to deform. The strain gauge 12 on the side of the elastic diaphragm 11 opposite to the guide plug 22 changes its resistance with the deformation, while the piezoelectric crystal 13 generates an electric charge due to the force. These physical changes are converted into electrical signals, which, after processing, serve as the output signal of the pressure sensor 10. The fixed connection between the periphery of the elastic diaphragm 11 and the housing ensures that the deformation is concentrated in the effective sensing area, guaranteeing signal stability.

[0051] More preferably, the plane of the elastic diaphragm 11 facing the guide plug 22 forms the pressure receiving surface of the sensing end, and the pressure receiving surface is opposite to and spaced apart from the end of the guide plug 22 or in direct contact with it.

[0052] Based on the principle of pressure transmission path optimization, the interval setting utilizes the fluidity of magnetorheological fluid to enhance the buffering effect, while direct contact improves the response speed through rigid transmission. Both methods ensure that the pressure can act on the sensing end efficiently and stably.

[0053] Preferably, the electromagnetic coil 24 is electrically connected to an external control circuit, which is configured to dynamically adjust the current of the electromagnetic coil 24 according to the rate of change of the received pressure signal, thereby changing the viscosity of the magnetorheological fluid.

[0054] The control circuit uses an existing circuit structure, including a microprocessor, a signal conditioning module, and a power amplification unit. The microprocessor is responsible for calculating the rate of change of the pressure signal, the signal conditioning module filters and amplifies the output signal from the pressure sensor, and the power amplification unit adjusts the current of the electromagnetic coil 24 according to the microprocessor's instructions, forming a closed-loop control circuit.

[0055] The signal output by pressure sensor 10 is transmitted to an external control circuit, which analyzes the rate of change of the signal in real time. When the rate of change exceeds a set threshold, the control circuit increases the current of electromagnetic coil 24 to strengthen the magnetic field and increase the viscosity of the magnetorheological fluid; when the rate of change tends to stabilize, the current is reduced to decrease the magnetic field strength, causing the viscosity to drop. This dynamic adjustment process continuously responds to pressure fluctuations.

[0056] By adjusting the viscosity of the magnetorheological fluid, the buffering effect is matched to the pressure fluctuation state in real time. Strong buffering suppresses oscillations at high rates of change, while low viscosity ensures a fast response when stable, effectively reducing the alternating load on the pressure sensor and mitigating signal drift.

[0057] It should be noted that the set threshold can be adjusted according to the actual working conditions, and this utility model does not impose any specific limitations.

[0058] Preferably, chamber 23 includes interconnected narrow slit channels and wide slit channels.

[0059] Narrow slit channels are either rectangular or circular cross-sections. Rectangular cross-section narrow slits are easier to manufacture, while circular cross-section narrow slits have a more uniform distribution of fluid resistance.

[0060] The wide-slit channel can be cylindrical or conical. Cylindrical wide-slits have stable volume, while conical wide-slits can guide the fluid to transition smoothly.

[0061] Because the pressure sensor 10 is affected by alternating loads, its output pressure waveform is not an ideal sine wave, and the traditional symmetrical structure chamber 23 is difficult to match the asymmetrical stress characteristics. Therefore, the chamber 23 is set as a connected narrow slit flow channel and a wide slit channel, so that during the pressure rise phase, the magnetorheological fluid can quickly form a rigid barrier under the magnetic field of the electromagnetic coil 24, enhancing its impact resistance; during the pressure fall phase, the magnetorheological fluid is allowed to flow slowly and steadily.

[0062] Another advantage of this invention is that the narrow slit channel restricts the fluid velocity and allows the magnetorheological fluid to quickly form a rigid barrier, enhancing the damping effect and attenuating high-frequency pressure fluctuations; the wide slit channel provides space for the fluid, reducing pressure buildup and acting as a buffer and expansion mechanism when pressure changes rapidly. The two work together to enable the magnetorheological fluid to efficiently transmit and buffer pressure under different pressure conditions.

[0063] Preferably, the transformer sleeve 20 is made of a magnetically conductive material, forming part of the magnetic circuit of the electromagnetic coil 24. Alternatively, the transformer sleeve 20 is made of a non-magnetically conductive material, and a magnetically conductive core is embedded in the slot of the electromagnetic coil 24.

[0064] If the transformer sleeve 20 is made of magnetically conductive material, the magnetic field generated by the electromagnetic coil 24 forms a closed magnetic circuit along the sleeve, enhancing the magnetic field strength in the chamber 23.

[0065] If the material is non-magnetic, the magnetic core in the coil slot guides the magnetic field to concentrate in the cavity 23, reducing magnetic field leakage.

[0066] Preferably, the bottom inner cavity of the transformer sleeve 20 is provided with an electromagnetic shielding structure 25. The electromagnetic shielding structure 25 is sealed by a sealing ring outside the bottom inner cavity of the transformer sleeve 20. The electromagnetic shielding structure 25 includes a metal shielding mesh and ferrite absorbing material filled in its mesh.

[0067] When the turbocharger solenoid valve generates high-frequency electromagnetic radiation, the outer copper mesh reflects part of the electromagnetic waves through the eddy current effect, and the ferrite particles absorb the remaining low-frequency magnetic field, achieving double shielding.

[0068] Meanwhile, the chain-like structure formed by the magnetorheological fluid under the action of the magnetic field can further attenuate the residual interference that passes through the shielding layer, thereby reducing the electromagnetic interference resistance of the signal circuit of the pressure sensor 10 and making it less prone to signal drift.

[0069] Preferably, the pressure sensor 10 and the transformer sleeve 20 are detachably connected by a threaded pair, and the connection is sealed by a sealing ring.

[0070] During installation, the pressure sensor 10 and the transformer sleeve 20 are tightened together using a threaded connection. The sealing ring at the connection point is compressed and deformed, filling the gaps to form a seal. For disassembly, simply loosen the threads in the opposite direction to separate the two components, facilitating maintenance or replacement of the pressure sensor. The sealing ring maintains a continuous seal, preventing fluid leakage from affecting pressure transmission.

[0071] Preferably, the magnetorheological fluid contains conventionally available components, specifically including a silicone oil base, uniformly dispersed carbonyl iron powder particles, and additives to prevent particle sedimentation.

[0072] The additive can be nano-silica particles or polyethylene glycol. Nano-silica particles prevent particle sedimentation through steric hindrance, while polyethylene glycol can improve the compatibility between the base liquid and the particles.

[0073] The silicone oil-based fluid provides a dispersion medium for the magnetic particles. Under the influence of a magnetic field, the carbonyl iron powder particles rapidly form a chain-like structure, altering the viscosity of the magnetorheological fluid. Additives adhere to the particle surface, preventing particle sedimentation and ensuring uniform dispersion of the particles in the base fluid. The synergistic effect of these three components enables the magnetorheological fluid to stably exert its buffering performance under different magnetic field intensities. Example

[0074] A hydraulic system includes a connected ultra-high pressure cylinder and a booster. The hydraulic system is equipped with a hydraulic overpressure treatment device as shown in Example 1. The pressure port 21 of the hydraulic overpressure treatment device is connected to the cavity of the ultra-high pressure cylinder.

[0075] The booster pressurizes the hydraulic oil and delivers it to the ultra-high pressure cylinder. The hydraulic overpressure treatment device inside the ultra-high pressure cylinder receives the pressure through pressure port 21, and after passing through guide plug 22 and magnetorheological fluid buffer, it is detected by pressure sensor 10. The stable signal output by the device is fed back to the system to adjust the pressurization rate of the booster, so that the inner layer material of the oil pipe undergoes uniform plastic deformation, completing the self-reinforcing treatment.

[0076] Based on the principle of system integration, the hydraulic overpressure treatment device is integrated with the ultra-high pressure cylinder and the booster. Through the pressure detection and buffering function of the hydraulic overpressure treatment device, the pressure of the entire hydraulic system can be precisely controlled, ensuring the stability of the oil pipe treatment process.

[0077] Although the illustrative specific embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the specific embodiments. For those skilled in the art, all utility model creations utilizing the concept of the present invention are protected as long as various variations are within the spirit and scope of the present invention as defined and determined by the appended claims.

Claims

1. A hydraulic overpressure treatment device, comprising a pressure sensor and a transformer sleeve connected to the pressure sensor, characterized in that, The transformer sleeve is provided with a pressure port for introducing fluid pressure; The hydraulic overpressure treatment device also includes a guide plug, which is installed in the pressure port in a sliding seal manner, and the guide plug is located in the pressure transmission path of the sensing end of the pressure sensor; The guide plug and the transformer sleeve enclose a chamber filled with magnetorheological fluid; The coil groove on the outer wall of the chamber is equipped with an electromagnetic coil for adjusting the viscosity of the magnetorheological fluid, so that the fluid pressure acting on the guide plug is buffered by the magnetorheological fluid and then transmitted to the sensing end of the pressure sensor.

2. The hydraulic overpressure treatment device according to claim 1, characterized in that, The pressure sensor includes a housing and a pressure-sensing component encapsulated within the housing and constituting the sensing end; the pressure-sensing component includes an elastic diaphragm, a strain gauge, and a piezoelectric crystal; The periphery of the elastic diaphragm is fixedly connected to the housing; The strain gauge is attached to the side of the elastic diaphragm facing away from the guide plug; The piezoelectric crystal is attached to the groove on the side of the strain gauge or the elastic diaphragm facing away from the guide plug.

3. The hydraulic overpressure treatment device according to claim 2, characterized in that, The plane of the elastic diaphragm facing the guide plug constitutes the pressure receiving surface of the sensing end. The pressure receiving surface is opposite to and spaced apart from the end of the guide plug or in direct contact with it.

4. The hydraulic overpressure treatment device according to claim 1, characterized in that, The electromagnetic coil is electrically connected to an external control circuit, which is configured to dynamically adjust the current of the electromagnetic coil according to the rate of change of the received pressure signal, thereby changing the viscosity of the magnetorheological fluid.

5. The hydraulic overpressure treatment device according to claim 1, characterized in that, The chamber includes interconnected narrow slit channels and wide slit channels.

6. The hydraulic overpressure treatment device according to claim 1, characterized in that, The transformer sleeve is made of a magnetically conductive material and forms part of the magnetic circuit of the electromagnetic coil; or, the transformer sleeve is made of a non-magnetically conductive material and a magnetically conductive core is embedded in the slot of the electromagnetic coil.

7. The hydraulic overpressure treatment device according to claim 1, characterized in that, The bottom inner cavity of the transformer sleeve is provided with an electromagnetic shielding structure. The electromagnetic shielding structure is sealed by a sealing ring outside the bottom inner cavity of the transformer sleeve. The electromagnetic shielding structure includes a metal shielding mesh and ferrite absorbing material filled in its mesh.

8. The hydraulic overpressure treatment device according to claim 1, characterized in that, The pressure sensor and the transformer sleeve are detachably connected via a threaded joint, and the connection is sealed by a sealing ring.

9. The hydraulic overpressure treatment device according to claim 1, characterized in that, The magnetorheological fluid includes a silicone oil-based fluid, carbonyl iron powder particles uniformly dispersed therein, and additives to prevent particle sedimentation.

10. A hydraulic system comprising a connected ultra-high pressure cylinder and a booster, characterized in that, The hydraulic system is equipped with a hydraulic overpressure treatment device as described in any one of claims 1 to 9, wherein the pressure port of the hydraulic overpressure treatment device is connected to the cavity of the ultra-high pressure cylinder.

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