Temperature and pressure detection device and ultra-low temperature ball valve

Abstract

This invention relates to the technical field of testing equipment, and discloses a temperature and pressure testing device and an ultra-low temperature ball valve. The temperature and pressure testing device includes a sensor body, a probe fixedly connected to one side of the sensor body, and a sheath fixedly connected to one end of the probe. The bottom end of the sheath is configured with an oblique section, with the lowest point of the oblique section located on the side of the sheath furthest from the cryogenic valve sleeve. A buffer plate and a vertical buffer are located outside the sheath. Through the coaxial integrated structure of the probe and sheath, the sensor core is ensured to face the mainstream fluid in the pipeline, avoiding the turbulence and displacement problems caused by eccentric arrangement. Furthermore, relying on the special structure of the oblique section at the bottom of the sheath, the fluid can be intercepted and diverted. Combined with the controllable overflow channel formed by the adaptive tilting of the arc-shaped spring, a unidirectional medium circulation loop is constructed, ensuring that the probe detection area is always completely wetted by a uniform medium, adapting to the continuous temperature and pressure data acquisition requirements under complex ultra-low temperature conditions.

Description

Technical Field

[0001] This invention relates to the technical field of testing equipment, and in particular to a temperature and pressure testing device and an ultra-low temperature ball valve. Background Technology

[0002] The cryogenic ball valve is connected in series in the temperature and pressure detection branch. Under normal conditions, it is fully open to ensure normal flow of the medium and accurate parameter acquisition. In the event of equipment maintenance, the medium in the pipeline can be quickly cut off, completely isolating the temperature and pressure detection component from the cryogenic medium in the main pipeline. The temperature and pressure detection device directly contacts the medium through a sensing element that extends into the pipeline to collect fluid temperature and pressure parameters in real time. The two work together to ensure continuous and stable acquisition of temperature and pressure data under cryogenic conditions, meeting the long-term safe operation requirements of cryogenic pipelines.

[0003] However, in existing technologies, the pressure-tapping pipelines or valve chambers of conventional equipment are in closed, ineffective cavities. Cryogenic liquids are susceptible to minute amounts of thermal radiation from the environment, causing localized vaporization in the pipeline due to heat. This forms a stable gas lock within the pressure-tapping channel, blocking the real-time transmission of pressure media, resulting in slow pressure data response and large numerical fluctuations. Furthermore, the temperature-sensing sleeve uses a straight cylindrical structure. After the probe is inserted into the pipeline, a static stagnant layer easily forms on the outer wall of the sleeve in contact with the fluid. Due to the unique fluidity of cryogenic liquids, this stagnant layer cannot be renewed in a timely manner, increasing heat exchange resistance. This easily leads to the temperature-sensing element being unable to quickly detect changes in medium temperature, resulting in significant temperature measurement lag. Simultaneously, the interference from cold air on the pipeline wall and the impact of fluid turbulence are amplified, further exacerbating temperature detection errors and making it difficult to capture temperature changes. The subtle temperature fluctuations in cryogenic pipelines, coupled with the tendency of cryogenic liquids to precipitate trace amounts of ice crystals and impurities that adhere to the surface of the temperature sensing sleeve and the inside of the pressure tapping channel, can lead to detection failures, increased maintenance costs, and downtime risks due to the continuous accumulation of these impurities. Furthermore, the cantilever section extending into the cryogenic liquid pipeline is completely suspended without any support or restraint. Under the continuous scouring and alternating turbulence of the high-speed flowing cryogenic fluid, the cantilever end of the sleeve is prone to continuous high-frequency micro-vibrations and resonances. This inability to effectively buffer vibration stress, coupled with long-term alternating stress, can cause stress concentration at the base of the sleeve, leading to fatigue cracking, temperature sensing element displacement, and detection point failure. It can also directly cause cryogenic medium leakage, resulting in equipment malfunction. Summary of the Invention

[0004] The purpose of this invention is to provide a temperature and pressure detection device and an ultra-low temperature ball valve to solve the problem of poor stability in ultra-low temperature and pressure detection.

[0005] This invention proposes a temperature and pressure detection device, comprising a sensor body, a probe fixedly connected to one side of the sensor body, a sheath fixedly connected to one end of the probe, a vertical buffer component disposed outside the probe, multiple buffer plates disposed at equal angles and connected below the vertical buffer component, an arc-shaped spring piece connected to the sheath at its top, an overflow sleeve fixedly connected inside the sheath, a flexible wire mesh fixedly connected to the probe, and an arc block fixedly connected to the bottom end of the sheath. The outer edge of the arc-shaped spring piece does not contact the sheath, the arc-shaped spring piece is located in the middle of the outer side of the overflow sleeve, the flexible wire mesh is located inside the overflow sleeve, the overflow sleeve is located above the arc block, the probe and the sheath are coaxial, the bottom end of the sheath is set with an oblique section, and the buffer plates and the vertical buffer component are both located outside the sheath.

[0006] Furthermore, the vertical buffer includes a top ring that engages with the probe, a spring connected to the top ring, a collar connected to the spring, and an inclined cone plate fixedly connected to the bottom of the collar. The top ring is fixedly connected with a retaining strip, and multiple frames are arranged at equal angles at the bottom of the collar. A stop frame is fixedly connected to the frame, and two protruding strips are provided inside the collar.

[0007] Furthermore, a torsion spring is connected between the buffer plate and the collar, and multiple triangular slots are equally spaced at the bottom of the buffer plate, with the equal angle of the multiple buffer plates being 270 degrees.

[0008] Furthermore, both the inclined cone plate and the arc-shaped spring are located on the side of the sheath, and the inclined cone plate and the buffer plate gradually move away from the center of the sheath from top to bottom.

[0009] Furthermore, the diameter of the middle part of the overflow sleeve is smaller than the diameter of the two ends, and an overflow hole is provided at the top of the overflow sleeve, which is located above the arc-shaped spring piece.

[0010] Furthermore, the outer side of the sheath is provided with two vertical strips, the arc-shaped spring piece is located between the two vertical strips, the bottom end of the arc-shaped spring piece and the inclined section are both located on the same side of the sheath, and the two protruding strips are in contact with the corresponding vertical strips.

[0011] Furthermore, the bottom end of the flexible wire mesh is a solid structure, and multiple cores are set at equal angles at the bottom end of the probe. The cores are distributed around the flexible wire mesh, and a slot is opened on the outside of the probe, with the locking strip located inside the slot.

[0012] Furthermore, the convex end of the arc block gradually slopes and smoothly transitions to both sides, and multiple through holes are provided on both the arc block and the sheath. The curvature from the convex end to the top of the arc block is smaller than the curvature from the convex end to the bottom.

[0013] Another aspect of the present invention provides: a cryogenic ball valve, which works in conjunction with a temperature and pressure detection device, including a cryogenic valve sleeve, an outlet pipe fixedly connected to one side of the cryogenic valve sleeve, an inlet pipe fixedly connected to the other side of the cryogenic valve sleeve, a ball rotatably connected inside the cryogenic valve sleeve, a valve stem rotatably connected to the top of the cryogenic valve sleeve, a shaft fixedly connected inside the cryogenic valve sleeve, and an adaptive sleeve disposed inside the cryogenic valve sleeve. The sensor body is connected to the outlet pipe, and two adaptive sleeves are provided. The bottom end of the inclined section is located on the side of the sleeve away from the cryogenic valve sleeve.

[0014] Furthermore, the top of the ball is fixedly connected to the valve stem, the bottom of the ball is rotatably connected to the outside of the shaft, two adaptive sleeves are located on both sides of the ball, the adaptive sleeves are in contact with the ball, a first sealing detector and a second sealing detector are connected to the cryogenic valve sleeve, one end of the first sealing detector is located between the ball and the cryogenic valve sleeve, two second sealing detectors are provided, one end of the second sealing detector is located between the adaptive sleeve and the cryogenic valve sleeve.

[0015] The beneficial effects of this invention are: The probe and sheath are integrated in a coaxial structure, ensuring that the sensing core is directly facing the mainstream fluid in the pipeline, avoiding the turbulence and offset problems caused by eccentric arrangement. Furthermore, the special structure of the inclined section at the bottom of the sheath can intercept and divert the fluid, eliminating the static stagnation zone at the bottom of the sheath and allowing the surrounding medium to flow continuously and dynamically. This effectively suppresses the vaporization phenomenon caused by heat transfer due to stagnation in the low-temperature medium and weakens the temperature measurement interference caused by cold radiation from the wall. At the same time, the central contraction overflow sleeve forms a beam effect, improving the efficiency of medium replacement inside the cavity. Combined with the controllable overflow channel formed by the adaptive tilting of the arc-shaped spring, a unidirectional medium circulation loop is constructed, ensuring that the probe detection area is always completely wetted by a uniform medium, adapting to the continuous temperature and pressure data acquisition requirements under complex ultra-low temperature conditions.

[0016] The combined structure of top ring locking limit, spring flexible buffer, and collar positioning effectively buffers the axial vibration stress of the probe, avoids rigid accumulation of vibration at the probe root, and eliminates the resonance problem of the cantilever structure. The outward-expanding inclined cone plate at the bottom of the collar, together with the buffer plates arranged at equal angles, forms an all-round fluid protection structure, which can guide and divert high-speed fluid, disperse concentrated scouring force, and reduce the frontal impact of fluid on the cantilever section of the sheath. At the same time, the buffer plate relies on torsion springs to achieve adaptive elastic swing, which can adapt to different turbulent working conditions. The triangular groove at the bottom can divert the fluid a second time, avoiding the accumulation of medium and the formation of high-pressure turbulence. It comprehensively weakens turbulent vibration, reduces the amplitude of structural sway and scouring wear, ensures long-term stable operation of the device, and effectively extends the service life of the equipment.

[0017] By incorporating a solid, shaped, flexible wire mesh inside the sheath, trace amounts of ice crystals and solid impurities precipitated from the fluid can be intercepted, preventing impurities from wearing down the sensor core. Simultaneously, relying on the continuous overflow disturbance of the medium, the wire mesh can achieve flexible micro-vibration, preventing scale buildup and achieving a long-lasting self-cleaning effect, eliminating the need for frequent disassembly and maintenance. Furthermore, the adaptive sleeve and ball-body fit seal automatically compensates for the ball's rotational clearance, ensuring a full-angle sealing effect for the valve body. It also features a graded sealing detector that monitors the fit clearance between the ball and valve sleeve, and between the adaptive sleeve and valve sleeve, comprehensively identifying potential media leakage and enabling controllable monitoring of the cryogenic pipeline's operating status. Balancing anti-clogging durability with operational safety, it is suitable for various complex cryogenic pipeline temperature and pressure testing scenarios. Attached Figure Description

[0018] Figure 1 This is a first-view three-dimensional structural diagram of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a schematic diagram of the temperature and pressure detection device of the present invention; Figure 4 This is a cross-sectional view of the temperature and pressure detection device of the present invention; Figure 5 This is a schematic diagram of the probe structure of the present invention; Figure 6 This is a schematic diagram of the vertical buffer component of the present invention; Figure 7 This is a schematic diagram of the structure of the sheath of the present invention; Figure 8 For the present invention Figure 2 Sectional view at point AA; Figure 9 For the present invention Figure 2 Sectional view at point BB.

[0019] In the picture: 1. Sensor body; 2. Probe; 21. Core; 201. Slot; 3. Sheath; 31. Vertical bar; 301. Oblique section; 4. Vertical buffer; 41. Top ring; 411. Locking bar; 42. Spring; 43. Collar; 431. Frame; 432. Stop frame; 433. Protruding bar; 44. Oblique cone plate; 5. Buffer plate; 51. Torsion spring; 501. Triangular groove; 6. Arc-shaped spring; 7. Overflow sleeve; 71. Overflow hole; 8. Flexible wire mesh; 9. Arc block; 10. Through hole; 11. Low temperature valve sleeve; 12. Outlet pipe; 13. Inlet pipe; 14. Ball; 15. Valve stem; 16. Shaft; 17. Adaptive sleeve; 101. First seal detector; 102. Secondary seal detector. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0021] Example 1, refer to Figures 1-9 This is the first embodiment of the present invention, which provides a temperature and pressure detection device, including a sensor body 1, a probe 2 fixedly connected to one side of the sensor body 1, a sheath 3 fixedly connected to one end of the probe 2, a vertical buffer 4 disposed outside the probe 2, multiple buffer plates 5 disposed at equal angles and connected below the vertical buffer 4, an arc-shaped spring 6 connected to the top of the sheath 3, an overflow sleeve 7 fixedly connected inside the sheath 3, a flexible wire mesh 8 fixedly connected to the probe 2, and an arc block 9 fixedly connected to the bottom of the sheath 3. The outer edge of the arc-shaped spring 6 does not contact the sheath 3, the arc-shaped spring 6 is located in the middle of the outer side of the overflow sleeve 7, the flexible wire mesh 8 is located inside the overflow sleeve 7, the overflow sleeve 7 is located above the arc block 9, the probe 2 and the sheath 3 are coaxial, the bottom end of the sheath 3 is set with a sloping section 301, and the buffer plates 5 and the vertical buffer 4 are both located outside the sheath 3.

[0022] Specifically, a coaxial integrated fixing structure is adopted for probe 2 and sheath 3 to ensure the coaxiality and assembly regularity of the detection components. This ensures that the sensing working surface of probe 2 is aligned with the mainstream fluid area of ​​the pipeline, avoiding turbulence offset caused by eccentric arrangement. The fluid flows towards sheath 3, and when the fluid contacts the inclined section 301 of sheath 3, it can be intercepted and segmented using the inclined section 301 to form a separated backflow, eliminating the static stagnation area at the bottom end face of sheath 3. This allows the fluid around sheath 3 to be continuously and dynamically renewed, effectively suppressing the vaporization phenomenon caused by fluid stagnation heat transfer, weakening the temperature measurement interference caused by wall cold radiation and static heat transfer, and reducing thermal resistance accumulation. The vertical buffer 4 is fixed to the outside of probe 2, and multiple buffer plates 5 are connected at equal angles below the vertical buffer 4, arranged around the outside of sheath 3 to form an external rigid buffer system. When high-speed fluid impacts, the equally angled buffer plates 5 can evenly distribute the impact load, disperse the unidirectional concentrated scouring force, and weaken the turbulence vibration excitation. The vertical buffer 4 can buffer the axial vibration stress of probe 2, effectively limiting the cantilever. The amplitude of the swaying section improves the overall stability of the structure. The ultra-low temperature mainstream fluid in the pipeline continuously flows into the overflow sleeve 7, fully filling the hollow cavity of the sheath 3, so that the sensing and detection area of ​​the probe 2 is completely immersed in a uniform and stable dynamically updated low temperature medium, eliminating stagnant heat transfer and wall cold interference, effectively ensuring the continuity of temperature acquisition. Relying on the cooperation structure of the overflow sleeve 7 and the arc-shaped spring 6, a complete fluid overflow circuit is formed. The medium flowing into the cavity generates overflow flow under the action of continuous fluid pressure, constantly flushing the internal space of the cavity, realizing the circulation and renewal of the medium. The continuously flowing overflow fluid acts on the arc-shaped spring 6, and the bottom end of the arc-shaped spring 6 is adaptively tilted upward by the dynamic thrust of the medium, forming a controllable open overflow slot between the arc-shaped spring 6 and the overflow sleeve 7, improving the response speed and data stability of pressure detection under ultra-low temperature conditions. In order to enhance the anti-clogging capability, the soft wire mesh 8 can effectively intercept the trace ice crystals and solid impurities precipitated in the fluid, preventing impurities from wearing the sensing surface of the probe 2 or blocking the pressure channel. Meanwhile, relying on the dynamic overflow and continuous disturbance of the fluid, the soft wire mesh 8 can be slightly and flexibly shaken to prevent impurities from hard adhering and forming scale, thus achieving continuous self-cleaning.

[0023] Reference Figures 1-7 The vertical buffer 4 includes a top ring 41 that is snapped into the probe 2, a spring 42 connected to the top ring 41, a collar 43 connected to the spring 42, and an inclined cone plate 44 fixedly connected to the bottom of the collar 43. The top ring 41 is fixedly connected with a retaining strip 411. Multiple splicing frames 431 are set at equal angles at the bottom of the collar 43. A stop frame 432 is fixedly connected to the splicing frame 431. Two protrusions 433 are set inside the collar 43.

[0024] Both the inclined cone plate 44 and the arc-shaped spring piece 6 are located on the side of the sheath 3, and the inclined cone plate 44 and the buffer plate 5 gradually move away from the center of the sheath 3 from top to bottom.

[0025] Specifically, the top ring 41 is fixedly equipped with a retaining strip 411, which is locked and limited to the outer wall of the probe 2 to ensure a tight connection between the top ring 41 and the probe 2 without loosening. A spring 42 is connected below the top ring 41, and the bottom end of the spring 42 is connected to the collar 43 to form a flexible elastic buffer transmission structure. This avoids the direct rigid transmission of vibration stress and its accumulation at the root of the probe 2, effectively improving the resonance of the cantilever structure. The bottom of the collar 43 is fixedly connected to an inclined cone plate 44. Both the inclined cone plate 44 and the buffer plate 5 adopt an outwardly expanding conical surface structure layout that gradually moves away from the center of the sheath 3 from top to bottom. This can guide and divert the high-speed impact fluid, disperse the concentrated fluid scouring force, and reduce the frontal impact intensity of the fluid on the cantilever section of the sheath 3. At the same time, the inclined and outwardly expanding plate structure can avoid the formation of new static stagnation zones and turbulent vortices on the outside of the buffer structure. While achieving efficient vibration reduction and buffering, it also helps to optimize the flow field environment around the sheath 3. Combined with the overall flow field optimization structure of the device, it further ensures the operational stability of the detection structure under ultra-low temperature conditions.

[0026] Reference Figures 1-6 A torsion spring 51 is connected between the buffer plate 5 and the collar 43. Multiple triangular slots 501 are equally spaced on the bottom of the buffer plate 5, and the equal angle of the multiple buffer plates 5 is 270 degrees.

[0027] Specifically, relying on the elastic deformation characteristics of the torsion spring 51, the buffer plate 5 possesses adaptive elastic swing capability. When the impact intensity of the pipeline fluid fluctuates or the turbulence direction changes, the buffer plate 5 can adaptively fine-tune its opening and closing angle with the help of the torsion spring 51 to achieve dynamic buffering and vibration reduction. At the same time, it can adapt to different flow velocity conditions and continuously maintain a stable diversion and buffering effect. The bottom of the buffer plate 5 has multiple triangular slots 501 evenly spaced. The hollow slot structure is used to divert and guide the fluid after impact. After the high-speed fluid washes over the buffer plate 5, some of the fluid can quickly penetrate and be guided through the triangular slots 501, avoiding the accumulation of fluid on the surface of the buffer plate 5, forming a high-pressure stagnation zone and turbulent vortex, effectively reducing the fluid back pressure and weakening the turbulence. Vibration excitation and the regular triangular groove 501 ensure uniform fluid diversion and no local fluid accumulation, continuously optimizing the flow field environment around the probe 2. In addition, multiple sets of buffer plates 5 are arranged in a 270-degree ring at equal angles, forming a 360-degree arrangement with a single inclined cone plate 44 outside the sheath 3. This adapts to the unidirectional mainstream flow direction of the pipeline fluid, forming an all-round buffer protection in the area covered by fluid impact, effectively intercepting and diverting the high-speed flushing fluid in the mainstream area. At the same time, a blank area is reserved for the inclined cone plate 44 to adapt to the flow path of the original fluid in the pipeline and the overflow fluid of the arc-shaped spring plate 6. Furthermore, there are gaps between the buffer plates 5 to avoid the full-circumference closed arrangement from hindering the normal flow of the medium and to maintain the flow efficiency of the pipeline fluid.

[0028] Reference Figures 1-7The outer side of the sheath 3 is provided with two vertical strips 31, and the arc-shaped spring piece 6 is located between the two vertical strips 31 to increase the local structural stress of the sheath 3. The bottom of the arc-shaped spring piece 6 and the inclined section 301 are both located on the same side of the sheath 3, forming a one-way loop. The two protruding strips 433 are attached to the corresponding vertical strips 31.

[0029] The diameter of the middle part of the overflow sleeve 7 is smaller than that of the two ends. The fluid beam effect is formed by the narrowing cross section in the middle. When the medium flows through the middle of the overflow sleeve 7, the flow velocity increases slightly, which can enhance the dynamic replacement capability of the medium inside the cavity, avoid medium stagnation, and keep the medium inside the sleeve 3 in a state of constant flow and renewal. This ensures that the medium temperature in the detection area of ​​the probe 2 is uniform and stable, and weakens the temperature measurement error caused by static heat exchange. The top of the overflow sleeve 7 is provided with an overflow hole 71, which is located above the arc-shaped spring 6, forming an upper and lower aligned exhaust overflow layout, which constitutes a complete unidirectional loop. Together with the lower flow groove formed by the arc-shaped spring 6 being lifted by the fluid impact, a medium circulation overflow loop that runs through the upper and lower parts is constructed, so that the internal medium can overflow and flow back to the mainstream area of ​​the pipeline in an orderly manner.

[0030] In addition, the top ring 41 has a slot corresponding to the vertical strip 31 to facilitate the socket assembly.

[0031] Specifically, the double vertical strips 31 form a regular limiting installation area, and the two sets of protruding strips 433 inside the collar 43 fit and match the corresponding vertical strips 31 on the outside of the sheath 3, forming an alignment and limiting structure. Through the fitting and limiting cooperation between the protruding strips 433 and the vertical strips 31, the circumferential rotation of the collar 43 relative to the sheath 3 can be completely restricted, avoiding the problem of uneven fluid force and unbalanced vibration reduction effect caused by misalignment during assembly rotation, effectively ensuring the overall structural stability of the device and the optimization effect of the flow field.

[0032] Reference Figures 1-7 The bottom of the flexible wire mesh 8 is a solid structure. Multiple cores 21 are set at equal angles at the bottom of the probe 2. The cores 21 are distributed around the flexible wire mesh 8. A slot 201 is opened on the outside of the probe 2, and the card strip 411 is located inside the slot 201.

[0033] Specifically, the bottom of the flexible wire mesh 8 adopts a solid structure to avoid deformation of the flexible wire mesh 8 under long-term fluid scouring, while ensuring that the bottom of the flexible wire mesh 8 always sinks down and maintains a regular filter interception shape. The equiangular surrounding layout allows each core 21 to independently and evenly contact the pipeline medium, realizing multi-point synchronous detection and effectively improving the comprehensiveness and accuracy of temperature and pressure parameter acquisition. The probe 2 has a slot 201 on the outside, and the clip 411 of the top ring 41 of the vertical buffer 4 is matched and embedded in the slot 201.

[0034] In addition, a collaborative detection structure mode of core 21 and sheath 3 is adopted. Core 21, as a sensing and detection component, directly contacts the dynamically circulating cryogenic medium to capture the changes in medium temperature and pressure parameters and realize data acquisition. Sheath 3, relying on its regular cavity structure and flow layout, stably constrains the internal medium flow field and ensures that the medium continuously and uniformly wraps the detection area of ​​core 21. This collaborative mode is characterized by core 21 being responsible for accurate data acquisition and sheath 3 being responsible for stabilizing the detection environment.

[0035] Reference Figures 2-7 The convex end of the arc block 9 gradually slopes and smoothly transitions to both sides, eliminating fluid turbulence and stagnation dead angles caused by structural corners. This allows the cryogenic fluid flowing over the surface of the arc block 9 to flow smoothly and naturally, preventing the formation of turbulent vortices and static stagnation layers on the surface of the arc block 9. This maintains the regularity of the internal flow field and ensures the continuity of the medium flow. Both the arc block 9 and the sheath 3 have multiple through holes 10. The curvature from the convex end to the top of the arc block 9 is smaller than the curvature from the convex end to the bottom, which can adapt to the mainstream flow direction of the pipeline fluid from top to bottom. The smaller top curvature can achieve rapid flow guidance, reduce fluid impact resistance, and prevent fluid collision and accumulation. The larger bottom curvature can expand the fluid flow space and guide the medium to flow downward evenly. Both the arc block 9 and the sheath 3 have several through holes 10. The multiple through holes 10 cooperate to form a through flow channel, so that the internal cavity of the device and the mainstream medium of the pipeline form a through flow path, forming a buffer and diversion.

[0036] Example 2, refer to Figures 1-9 The second embodiment of the present invention provides a temperature and pressure detection device, which works in conjunction with a temperature and pressure detection device. It includes a low-temperature valve sleeve 11, an outlet pipe 12 fixedly connected to one side of the low-temperature valve sleeve 11, an inlet pipe 13 fixedly connected to the other side of the low-temperature valve sleeve 11, a ball 14 rotatably connected inside the low-temperature valve sleeve 11, a valve stem 15 rotatably connected to the top of the low-temperature valve sleeve 11, a shaft 16 fixedly connected inside the low-temperature valve sleeve 11, and an adaptive sleeve 17 disposed inside the low-temperature valve sleeve 11. The sensor body 1 is connected to the outlet pipe 12. There are two adaptive sleeves 17, and the bottom end of the inclined section 301 is located on the side of the sheath 3 away from the low-temperature valve sleeve 11.

[0037] Since the lowest end of the inclined section 301 is located on the side away from the cryogenic valve sleeve 11, the inclined section 301 can be used to intercept and segment the flow, forming a separate backflow, which can optimize the fluid flow direction.

[0038] The top of the ball 14 is fixedly connected to the valve stem 15, and the bottom of the ball 14 is rotatably connected to the outside of the shaft 16. Two adaptive sleeves 17 are located on both sides of the ball 14. The adaptive sleeves 17 fit closely to the ball 14 to ensure that the ball 14 and the adaptive sleeves 17 are always spliced ​​together after rotation, thus ensuring a sealing and blocking effect. The cryogenic valve sleeve 11 is connected to a primary sealing detector 101 and a secondary sealing detector 102. One end of the primary sealing detector 101 is located between the ball 14 and the cryogenic valve sleeve 11. There are two secondary sealing detectors 102, and one end of the secondary sealing detector 102 is located between the adaptive sleeve 17 and the cryogenic valve sleeve 11.

[0039] Specifically, the inlet pipe 13 and outlet pipe 12 are fixedly connected to both sides of the cryogenic valve sleeve 11, forming a regular medium flow path. This allows for the directional flow of cryogenic media in the pipeline and provides stable medium input conditions for the downstream temperature and pressure detection structure. The sensor body 1 is connected to the outlet pipe 12 to achieve real-time acquisition of medium temperature and pressure parameters. The valve stem 15 drives the ball 14 to rotate coaxially around the shaft handle 16. Relying on the bottom limit support of the shaft handle 16 and the top drive positioning of the valve stem 15, the ball 14 rotates coaxially and smoothly during opening and closing, effectively ensuring the accuracy and stability of the pipeline medium switching action. Throughout the entire process of the ball 14's rotation and opening and closing, the adaptive sleeve 17 and the outer wall of the ball 14 are continuously spliced ​​and fitted, achieving a full-process sealing and isolation effect inside the valve body. Utilizing the fitting characteristics of the adaptive sleeve 17, the fitting gap during the rotation of the ball 14 can be automatically compensated, preventing medium leakage and ensuring the sealing reliability of the valve in fully open, fully closed, and fine-tuning states, effectively isolating the cryogenic medium in the pipeline.

[0040] The primary seal detector 101 is positioned at the mating gap between the ball 14 and the cryogenic valve sleeve 11 to monitor the sealing status of the main seal mating position of the valve body in real time and identify potential media leakage between the ball 14 and the cryogenic valve sleeve 11. The two sets of secondary seal detectors 102 are respectively positioned at the mating gaps between the adaptive sleeve 17 and the cryogenic valve sleeve 11 to monitor the sealing condition of the adaptive fitting sealing structure. This forms a graded and zoned detection layout, enabling comprehensive monitoring, timely feedback of sealing abnormalities, and improving the safety of cryogenic pipeline operation and the controllability of equipment maintenance.

[0041] The working principle of this invention is as follows: The cryogenic medium flows into the pipeline through the inlet pipe 13 of the cryogenic valve sleeve 11, passes through the inside of the sphere 14 and between the adaptive sleeve 17, and is then transported to the outlet pipe 12. After entering the outlet pipe 12, the medium flows towards the probe 2 and the sheath 3. The medium continuously impacts the sheath 3. A sloping section 301 is provided at the bottom of the sheath 3. After the fluid contacts the sloping section 301, it is diverted and guided, eliminating the static stagnation zone at the bottom of the sheath 3. When the medium impacts the outside of the sheath 3, the buffer plate 5 diverts and disperses the unidirectional scouring load. A portion of the fluid passes through the triangular groove 501 for drainage and pressure relief, weakening the fluid back pressure and alternating turbulence. The vibration load generated by the impact is transmitted from the buffer plate 5 to the torsion spring 51, and then the spring 42 absorbs the axial vibration stress, suppressing the cantilever swaying of the probe 2, avoiding resonance risks, optimizing the flow field around the sheath 3, and preventing… A vortex stagnant zone is formed on the outside. Some of the medium enters the inner cavity of the sheath 3 through the arc block 9 and flows into the overflow sleeve 7. The continuous flow of the medium causes the soft wire mesh 8 to vibrate slightly, preventing impurities from adhering and forming scale. At this time, the core 21 is completely immersed in the dynamically renewed low-temperature medium inside the overflow sleeve 7. The medium temperature and pressure signals are collected synchronously at multiple points. Under the action of pressure, part of the medium in the inner cavity overflows upward through the overflow hole 71, and the other part pushes the bottom end of the arc-shaped spring 6 to tilt upward, forming an overflow groove between the arc-shaped spring 6 and the side wall of the overflow sleeve 7. The overflow hole 71 and the arc-shaped spring 6 below form a vertically connected one-way overflow circuit, which promotes the continuous circulation and replacement of the medium in the inner cavity of the sheath 3, ensuring that the medium around the core 21 is always dynamically renewed, eliminating the temperature measurement error caused by static heat exchange, and improving the pressure detection response speed and acquisition stability.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A temperature and pressure detection device comprising a sensor body (1), characterized in that: It also includes a probe (2) fixedly connected to one side of the sensor body (1), a sheath (3) fixedly connected to one end of the probe (2), a vertical buffer (4) set outside the probe (2), multiple buffer plates (5) set at equal angles and connected below the vertical buffer (4), an arc-shaped spring piece (6) connected to the sheath (3) at its top, an overflow sleeve (7) fixedly connected inside the sheath (3), a flexible wire mesh (8) fixedly connected to the probe (2), and a fixedly connected to the sheath (3). The bottom arc block (9), the outer edge of the arc-shaped spring piece (6) does not contact the sheath (3), the arc-shaped spring piece (6) is located in the middle of the outer side of the overflow sleeve (7), the soft wire mesh (8) is located inside the overflow sleeve (7), the overflow sleeve (7) is located above the arc block (9), the probe (2) and the sheath (3) are coaxial, the bottom end of the sheath (3) is set as a sloping section (301), the buffer plate (5) and the vertical buffer (4) are both located outside the sheath (3).

2. The temperature and pressure detection device according to claim 1, characterized in that: The vertical buffer (4) includes a top ring (41) that is snapped into the probe (2), a spring (42) connected to the top ring (41), a collar (43) connected to the spring (42), and an inclined cone plate (44) fixedly connected to the bottom of the collar (43). The top ring (41) is fixedly connected with a retaining strip (411). Multiple splicing frames (431) are set at equal angles at the bottom of the collar (43). A stop frame (432) is fixedly connected to the splicing frame (431). Two protrusions (433) are set inside the collar (43).

3. The temperature and pressure detection device according to claim 2, characterized in that: A torsion spring (51) is connected between the buffer plate (5) and the collar (43). Multiple triangular slots (501) are equally spaced at the bottom of the buffer plate (5), and the angle of the multiple buffer plates (5) is 270 degrees.

4. The temperature and pressure detection device according to claim 2, characterized in that: Both the inclined cone plate (44) and the arc-shaped spring piece (6) are located on the side of the sheath (3), and the inclined cone plate (44) and the buffer plate (5) gradually move away from the center of the sheath (3) from top to bottom.

5. The temperature and pressure detection device according to claim 3, characterized in that: The diameter of the middle part of the overflow sleeve (7) is smaller than the diameter of the two ends. An overflow hole (71) is provided on the top of the overflow sleeve (7), and the overflow hole (71) is located above the arc-shaped spring piece (6).

6. The temperature and pressure detection device according to claim 3, characterized in that: The outer side of the sheath (3) is provided with two vertical strips (31), the arc-shaped spring piece (6) is located between the two vertical strips (31), the bottom end of the arc-shaped spring piece (6) and the inclined section (301) are both located on the same side of the sheath (3), and the two protruding strips (433) are in contact with the corresponding vertical strips (31).

7. The temperature and pressure detection device according to claim 5, characterized in that: The bottom of the flexible wire mesh (8) is a solid structure. Multiple cores (21) are set at equal angles at the bottom of the probe (2). The cores (21) are distributed around the flexible wire mesh (8). A slot (201) is opened on the outside of the probe (2). The card strip (411) is located inside the slot (201).

8. The temperature and pressure detection device according to claim 7, characterized in that: The convex end of the arc block (9) gradually slopes and smoothly transitions to both sides. Multiple through holes (10) are provided on both the arc block (9) and the sheath (3). The arc from the convex end to the top of the arc block (9) is less than the arc from the convex end to the bottom.

9. A cryogenic ball valve, used in conjunction with a temperature and pressure detection device as described in claim 1, comprising a cryogenic valve sleeve (11), characterized in that: It also includes an outlet pipe (12) fixedly connected to one side of the cryogenic valve sleeve (11), an inlet pipe (13) fixedly connected to the other side of the cryogenic valve sleeve (11), a ball (14) rotatably connected inside the cryogenic valve sleeve (11), a valve stem (15) rotatably connected to the top of the cryogenic valve sleeve (11), a shaft (16) fixedly connected inside the cryogenic valve sleeve (11), and an adaptive sleeve (17) set inside the cryogenic valve sleeve (11). The sensor body (1) is connected to the outlet pipe (12), and there are two adaptive sleeves (17). The bottom end of the inclined section (301) is located on the side of the sheath (3) away from the cryogenic valve sleeve (11).

10. A cryogenic ball valve according to claim 9, characterized in that: The top of the ball (14) is fixedly connected to the valve stem (15), and the bottom of the ball (14) is rotatably connected to the outside of the shaft (16). Two adaptive sleeves (17) are located on both sides of the ball (14), and the adaptive sleeves (17) are in contact with the ball (14). A first sealing detector (101) and a second sealing detector (102) are connected on the cryogenic valve sleeve (11). One end of the first sealing detector (101) is located between the ball (14) and the cryogenic valve sleeve (11). There are two second sealing detectors (102), and one end of the second sealing detector (102) is located between the adaptive sleeve (17) and the cryogenic valve sleeve (11).

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