An ultrasonic densimeter for refrigerant oil content analysis

Abstract

The application discloses an ultrasonic densimeter for refrigerant oil content analysis, and relates to the technical field of ultrasonic detection equipment, which comprises a control table, a quick dismounting line is fixedly installed at the detection end of the control table, an ultrasonic detection head is fixedly installed at the side, away from the control table, of the quick dismounting line, and the ultrasonic densimeter for refrigerant oil content analysis further comprises a rotary adjustment detection mechanism which is installed on the ultrasonic detection head and is used for multi-section adjustment detection; when the angle is adjusted, an operator manually rotates the ultrasonic detection head along a slide rail to rotate and adjust the ultrasonic detection head, so that the ultrasonic detection head can realize multi-angle rotary detection; the rotary adjustment can quickly align the ultrasonic emission and receiving probes with the optimal acoustic path, and meanwhile, the rotary adjustment can adapt to different pipe diameters and different installation spaces, thereby improving the measurement stability and precision.

Description

Technical Field

[0001] This invention relates to the field of ultrasonic testing equipment technology, specifically to an ultrasonic density meter for analyzing the oil content of refrigerants. Background Technology

[0002] An ultrasonic density meter is an online fluid density measuring instrument based on the propagation characteristics of ultrasonic waves. It mainly utilizes the correspondence between the propagation speed and attenuation amplitude of ultrasonic waves in liquid media and the density of the media. By transmitting and receiving ultrasonic signals through a probe, it can measure the real-time density of the fluid. Among these parameters, the oil content of the refrigerant is a key parameter for measuring the operating status of the refrigeration system.

[0003] Currently, there are significant shortcomings in the industry's methods for detecting refrigerant oil content. Traditional offline sampling and testing methods are cumbersome, have long testing cycles, and are prone to refrigerant loss and contamination during sampling. Furthermore, they cannot achieve real-time online monitoring and are ill-suited to the testing needs of continuous unit operation. Meanwhile, existing online testing equipment mostly uses optical and differential pressure detection principles, which are highly susceptible to interference from refrigerant impurities, bubbles, and temperature and pressure fluctuations, resulting in low detection accuracy and poor stability. Conventional density testing equipment has a complex structure, large size, and poor adaptability, making it unsuitable for testing delicate equipment such as small refrigeration units and vehicle air conditioners.

[0004] Ultrasonic density detection technology has the advantages of being non-contact, fast-response, and strong anti-interference, and can be adapted to real-time detection of fluid media. However, existing ultrasonic density meters lack a dedicated design for detecting the oil content of refrigerants. They do not take into account the miscibility of refrigerants and refrigeration oils or the optimization of temperature and pressure compensation algorithms, resulting in large deviations in the detection data. This makes it difficult to meet the needs of accurate detection of refrigerant oil content in industrial scenarios. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an ultrasonic density meter for analyzing the oil content of refrigerants, thus solving the problems mentioned in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an ultrasonic density meter for analyzing the oil content of refrigerants, comprising a control meter, wherein a quick-release cable is fixedly installed at the detection end of the control meter, and an ultrasonic detection head is fixedly installed on the side of the quick-release cable away from the control meter; the ultrasonic density meter for analyzing the oil content of refrigerants further comprises: A rotary adjustment detection mechanism is installed on the ultrasonic detection head, and the rotary adjustment detection mechanism is used to perform multi-segment adjustment detection. The rotation adjustment and detection mechanism includes a sliding ring mounted on the ultrasonic detection head, a slide rail mounted on the sliding ring, a locking block mounted on the tail end of the sliding ring, a sliding rod mounted on the initial end of the sliding ring, a sliding block mounted on the sliding rod, and a pulling block mounted on the side of the sliding rod away from the sliding block. The slide rail is slidably embedded inside the ultrasonic detection head. A sliding groove is formed inside the sliding ring. The outer wall of the sliding block contacts the sliding groove inside the sliding ring. A spring is provided between the sliding block and the sliding ring. The pulling block contacts the outer wall of the sliding ring. A locking groove is formed inside the locking block. The outer wall of the sliding block contacts the locking groove of the locking block. The outer wall of the locking block contacts the initial end of the sliding ring.

[0007] The ultrasonic densitometer for analyzing the oil content of refrigerant also includes an elastic sliding mechanism mounted on the slide rail for sliding adjustment on the pipeline. The elastic sliding mechanism includes a mounting shell mounted on the slide rail, a moving rod mounted inside the mounting shell, a pressure plate mounted on the moving rod, and a guide wheel mounted inside the moving rod.

[0008] The mounting shell is fixedly connected to the outer wall of the sliding ring, a spring is provided between the mounting shell and the pressure plate, and the circumferential surface of the guide wheel is in contact with the pipe.

[0009] The ultrasonic density meter for analyzing the oil content of refrigerant also includes a positioning mechanism installed on the ultrasonic detection head for magnetic positioning of the ultrasonic detection head during detection. The positioning mechanism includes a connecting block mounted on the ultrasonic detection head, a rotating plate mounted on the connecting block, a magnetic block mounted on the rotating plate, a long magnetic strip mounted on the sliding ring, and a limiting plate mounted on the ultrasonic detection head. A torsion spring is provided between the connecting block and the rotating plate, and the magnetic block contacts the outer wall of the long magnetic strip.

[0010] The ultrasonic density meter used for refrigerant oil content analysis also includes a reinforcement mechanism installed on the sliding ring to prevent the sliding ring from loosening during operation; The reinforcement mechanism includes a mounting plate mounted on the sliding ring, a threaded rod mounted inside the mounting plate, a limiting rod mounted on the mounting plate, and a soft contact plate mounted on the limiting rod.

[0011] The outer wall of the threaded rod is provided with a threaded groove. The threaded rod is threadedly connected to the mounting plate. The threaded rod is rotatably connected to the outer wall of the flexible contact plate. The outer wall of the flexible contact plate is in contact with the pipe. A rubber ring is provided at the fixed end of the flexible contact plate.

[0012] The ultrasonic density meter for analyzing the oil content of refrigerant also includes an anti-detachment mechanism installed on the ultrasonic detection head to prevent the ultrasonic detection head from detaching during operation. The anti-detachment mechanism includes a fixed plate mounted on the ultrasonic detection head, a connecting rod mounted on the fixed plate, an arc plate mounted on the connecting rod, and a baffle mounted on the arc plate. A spring is provided between the arc plate and the fixed plate. The arc plate contacts the outer wall of the quick-release line, and the baffle contacts the outer wall of the quick-release line.

[0013] The ultrasonic density meter used for refrigerant oil content analysis also includes a limiting mechanism installed on the arc plate to prevent loosening when the baffle is connected. The limiting mechanism includes a rotating rod mounted on the arc plate, a snap-fit ​​roller mounted on the rotating rod, and a limiting block mounted on the arc plate.

[0014] A torsion spring is provided between the rotating rod and the arc plate, and the snap-fit ​​roller contacts the outer wall of the limiting block.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, when adjusting the angle, the operator manually rotates the ultrasonic detection head along the slide rail, allowing the ultrasonic detection head to perform multi-angle rotation detection. Rotation adjustment enables the ultrasonic transmitting and receiving probes to quickly align with the optimal acoustic path. It also adapts to different pipe diameters and installation spaces, flexibly adjusting the sound beam angle to eliminate signal scattering interference from turbulence and bubbles, thus improving measurement stability and accuracy. The adjustable angle structure also compensates for installation deviations, reduces on-site assembly difficulty, minimizes oil content drift caused by probe misalignment, and achieves long-term reliable online monitoring. After the sliding ring is installed, it slides via guide wheels, reducing friction between the sliding ring and the pipe wall. Simultaneously, it drives the ultrasonic detection head to detect different locations on the pipe, effectively avoiding measurement errors caused by single-point interference such as localized bubbles, oil film stratification, pipe wall scaling, or weld seams, improving the accuracy and consistency of oil content detection. Multi-point detection allows for data comparison and verification, timely identification of outliers, and ensures reliable results.

[0016] 2. In this invention, after the ultrasonic detection head is angled, it moves the connecting block to the corresponding position. The magnetic field of the magnetic block and the magnetic field of the long magnetic strip attract each other, positioning the ultrasonic detection head. This prevents the probe from shifting or shifting due to unit vibration or pipeline shaking, avoiding drift in oil content measurement caused by ultrasonic signal attenuation or path changes. It ensures that the probe and the pipe wall remain in close contact, eliminating signal distortion caused by gaps and ensuring stable and reliable measurement data. After the sliding ring moves to another position via the guide wheel, the operator needs to work on the sliding ring. At this time, the operator rotates the threaded rod, which drives the soft contact plate to move through the threaded connection with the mounting plate. The rubber ring is used to softly fix the soft contact plate to the outer wall of the pipe, improving the accuracy and repeatability of oil content detection. This reduces the difficulty of on-site installation and commissioning, reduces the frequency of later maintenance and recalibration, and improves the reliability and anti-interference ability of the device under complex working conditions for long-term continuous operation.

[0017] 3. In this invention, when the ultrasonic testing head is installed on the quick-release line, the arc plate will drive the baffles on both sides to connect the quick-release line, ensuring that the probe is always in close contact with the pipe wall, maintaining a stable acoustic coupling state, reducing measurement errors, improving detection accuracy and data consistency, and ensuring long-term stable online operation of the device, providing continuous and reliable measurement data for the safety monitoring of the refrigeration system. When the arc plates approach each other, to prevent the arc plates from loosening, the clamping roller will enter the clamping groove of the limiting block to limit the arc plates, preventing signal loss and measurement failure due to detachment or loosening, ensuring the authenticity and reliability of the refrigerant oil content data. At the same time, it can reduce the risk of equipment damage, save the workload of frequent reset and re-adjustment, and improve the safety and stability of the device operation. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the positional structure of the sliding ring and the snap-fit ​​block of the present invention; Figure 3 This is a schematic diagram showing the positional structure of the moving rod and guide wheel of the present invention; Figure 4 This is a schematic diagram showing the positional structure of the locking block and the sliding block of the present invention; Figure 5 This is a schematic diagram showing the positional structure of the connecting block and the magnetic block in this invention; Figure 6 This is a schematic diagram showing the position and structure of the threaded rod and the soft contact plate of the present invention; Figure 7 This is a schematic diagram showing the position and structure of the connecting rod and the baffle of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of the structural position at point A in the middle.

[0019] The meanings of the labels in the diagram are as follows: 1. Control panel; 2. Quick assembly / disassembly line; 3. Ultrasonic detection head; 4. Sliding ring; 5. Slide rail; 6. Snap-fit ​​block; 7. Sliding rod; 8. Sliding block; 9. Pull block; 10. Mounting housing; 11. Moving rod; 12. Pressure plate; 13. Guide wheel; 14. Positioning mechanism; 141. Connecting block; 142. Rotating plate; 143. Magnetic block; 144. Long magnetic strip; 145. Limiting plate; 146. Mounting plate; 147. Threaded rod; 148. Limiting rod; 149. Soft contact plate; 15. Anti-fall-off mechanism; 151. Fixing plate; 152. Connecting rod; 153. Arc plate; 154. Baffle; 155. Rotating rod; 156. Snap-fit ​​roller; 157. Limiting block. Detailed Implementation

[0020] 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.

[0021] Example 1: Please refer to Figures 1-4 One embodiment of the present invention is: an ultrasonic density meter for analyzing the oil content of refrigerant, comprising a control gauge 1, a quick-release cable 2 fixedly installed at the detection end of the control gauge 1, and an ultrasonic detection head 3 fixedly installed on the side of the quick-release cable 2 away from the control gauge 1. The ultrasonic density meter for analyzing the oil content of refrigerant further includes: A rotary adjustment testing mechanism is installed on the ultrasonic testing head 3. The rotary adjustment testing mechanism is used to perform multi-segment adjustment testing. The rotation adjustment mechanism includes a sliding ring 4 mounted on the ultrasonic detection head 3, a slide rail 5 mounted on the sliding ring 4, a locking block 6 mounted on the tail end of the sliding ring 4, a sliding rod 7 mounted on the initial end of the sliding ring 4, a sliding block 8 mounted on the sliding rod 7, and a pulling block 9 mounted on the side of the sliding rod 7 away from the sliding block 8. The slide rail 5 is slidably embedded in the interior of the ultrasonic detection head 3. A sliding groove is opened inside the sliding ring 4. The outer wall of the sliding block 8 contacts the sliding groove inside the sliding ring 4. A spring is provided between the sliding block 8 and the sliding ring 4. The pulling block 9 contacts the outer wall of the sliding ring 4. A locking groove is opened inside the locking block 6. The outer wall of the sliding block 8 contacts the locking groove of the locking block 6. The outer wall of the locking block 6 contacts the initial end of the sliding ring 4.

[0022] The ultrasonic density meter used for refrigerant oil content analysis also includes an elastic sliding mechanism mounted on slide rail 5 for sliding adjustment on the pipeline. The elastic sliding mechanism includes a mounting shell 10 mounted on the slide rail 5, a moving rod 11 mounted inside the mounting shell 10, a pressure plate 12 mounted on the moving rod 11, and a guide wheel 13 mounted inside the moving rod 11.

[0023] The mounting shell 10 is fixedly connected to the outer wall of the sliding ring 4. A spring is provided between the mounting shell 10 and the pressure plate 12. The circumferential surface of the guide wheel 13 is in contact with the pipe.

[0024] In this embodiment, before testing, the operator uses a non-invasive installation method with external clamping, which eliminates the need to break pipes or contact the refrigerant. It can monitor the oil content of the liquid refrigerant and refrigeration oil mixture in the refrigeration system in real time, primarily relying on the correlation between ultrasonic velocity and medium density for detection. During operation, the outer wall of the refrigerant pipe to be tested is first cleaned, and ultrasonic coupling agent is applied to eliminate air gaps. The operator then attaches the sliding ring 4. During attachment, the initial end of the sliding ring 4 drives the locking block 6 to move along the inside of the sliding ring 4. As it moves, the locking block 6 contacts the outer wall of the sliding block 8 through its inclined surfaces on both sides, thus squeezing and moving the sliding block 8 through the inclined surfaces of the locking block 6. As the locking block 6 continues... The sliding block 8 is moved to contact the outer wall of the inner slot. At this time, the sliding block 8 will be positioned by the spring between it and the sliding ring 4. Thus, the sliding block 8 cooperates with the slot of the locking block 6 to quickly engage the sliding ring 4. After the sliding ring 4 is engaged, the ultrasonic detection heads 3 at both the transmitting and receiving ends are moved symmetrically along the outer wall of the slide rail 5 and fixed to the outer wall of the pipe. At the same time, they are in contact with the temperature sensor to ensure that the probe is in close contact with the pipe wall. The control table 1 drives the transmitting probe to generate high-frequency ultrasonic waves. The sound waves penetrate the probe coupling layer, the pipe wall, and the refrigerant oil mixture in the pipe in sequence. After penetrating the opposite side of the pipe wall, they are captured by the receiving probe. The system's automatic algorithm eliminates the signal loss caused by the pipe wall material and wall thickness, and accurately calculates the sound waves in the liquid state. The device measures the actual transit time and real-time sound velocity in the mixed medium. During the detection process, control table 1, relying on pre-stored calibration models specific to different refrigerants and refrigeration oils, calculates the real-time density of the mixed liquid by converting sound velocity, and then accurately calculates the oil content of the medium based on the density difference between pure refrigerant and refrigeration oil. This equipment has no moving mechanical parts and can continuously sample at the millisecond level. Ultimately, it displays parameters such as oil content, medium density, and temperature in real time and transmits them to the control system via a communication interface, achieving continuous online monitoring of the refrigerant oil content in the refrigeration system. It is compatible with unit operating condition monitoring and fault early warning. During testing, if a single-segment detection is inaccurate, the operator will manually rotate the ultrasonic detection head 3 along the slide rail 5 to adjust the measurement. The section allows the ultrasonic detection head 3 to perform multi-angle rotation detection. After completion, the operator can move the sliding rod 7 by pulling the pull block 9. The sliding rod 7 moves the sliding block 8, which compresses the elasticity between the sliding block 8 and the sliding ring 4. At this time, the locking block 6 can be manually removed, which removes the sliding ring 4. After completion, the operator releases the pull block 9, and the sliding block 8 will be reset by the spring between it and the sliding ring 4. Rotation adjustment allows the ultrasonic transmitting and receiving probes to quickly align with the optimal acoustic path. It can also adapt to different pipe diameters and different installation spaces, flexibly adjusting the sound beam angle to eliminate signal scattering interference caused by turbulence and bubbles, improving measurement stability and accuracy. The adjustable angle structure can also compensate for installation deviations, reduce on-site assembly difficulty, reduce oil content drift caused by probe misalignment, and achieve long-term reliable online monitoring. After the sliding ring 4 is installed, it is fitted onto the pipe. At this time, the sliding ring 4 will synchronously drive the mounting shell 10 to move closer to the outer wall of the pipe. The mounting shell 10 will drive the moving rod 11 to move closer to the outer wall of the pipe. The moving rod 11 will drive the guide wheel 13 to move closer to the outer wall of the pipe. The guide wheel 13 will be squeezed and contracted as it approaches the outer wall of the pipe. The guide wheel 13 will drive the moving rod 11 to squeeze and contract. The moving rod 11 will drive the pressure plate 12 to move. The movement of the pressure plate 12 will compress the spring between the pressure plate 12 and the mounting shell 10. When inspecting different pipe sections, the operator can manually push the sliding ring 4 to move along the outer wall of the pipe. The sliding ring 4 will move by driving the mounting shell 10. The mounting shell 10 will move the moving rod 11. The movement of the moving rod 11 will drive the guide wheel 13 to slide, reducing the friction between the sliding ring 4 and the outer wall of the pipe. At the same time, it can drive the ultrasonic testing head 3 to inspect different positions of the pipe, effectively avoiding measurement errors caused by single-point interference such as local bubbles, oil film stratification, pipe wall scaling or weld seams, and improving the accuracy and consistency of oil content detection. Multi-point detection enables data comparison and verification, timely identification of outliers, and ensures reliable results. It also flexibly avoids interference points such as insulation layers, valves, and supports, adapting to complex on-site installation conditions. A stable acoustic path can be obtained without modifying pipelines, improving the applicability and long-term operational stability of the device.

[0025] Example 2: Please refer to Figures 5-6 Based on the above embodiments, in another embodiment of the present invention, the ultrasonic density meter for analyzing the oil content of refrigerant further includes a positioning mechanism 14 installed on the ultrasonic detection head 3, which is used to magnetically position the ultrasonic detection head 3 during detection. The positioning mechanism 14 includes a connecting block 141 mounted on the ultrasonic detection head 3, a rotating plate 142 mounted on the connecting block 141, a magnetic block 143 mounted on the rotating plate 142, a long magnetic strip 144 mounted on the sliding ring 4, and a limiting plate 145 mounted on the ultrasonic detection head 3. A torsion spring is provided between the connecting block 141 and the rotating plate 142, and the magnetic block 143 contacts the outer wall of the long magnetic strip 144.

[0026] The ultrasonic densitometer used for refrigerant oil content analysis also includes a reinforcement mechanism mounted on the sliding ring 4 to prevent the sliding ring 4 from loosening during operation. The reinforcement mechanism includes a mounting plate 146 mounted on the sliding ring 4, a threaded rod 147 mounted inside the mounting plate 146, a limiting rod 148 mounted on the mounting plate 146, and a soft contact plate 149 mounted on the limiting rod 148.

[0027] The outer wall of the threaded rod 147 is provided with a threaded groove. The threaded rod 147 is threadedly connected to the mounting plate 146. The threaded rod 147 is rotatably connected to the outer wall of the soft contact plate 149. The outer wall of the soft contact plate 149 is in contact with the pipeline. A rubber ring is provided at the fixed end of the soft contact plate 149.

[0028] In this embodiment, after the ultrasonic detection head 3 has been adjusted at an angle, the ultrasonic detection head 3 moves the connecting block 141 to the corresponding position. At this time, the operator will manually rotate the rotating plate 142 to approach the long magnetic strip 144. The rotating plate 142 will then move the magnetic block 143 to approach the long magnetic strip 144. The magnetic field of the magnetic block 143 and the magnetic field of the long magnetic strip 144 will attract each other and form a fixed connection. The magnetic block 143 will complete the positioning of the ultrasonic detection head 3. When adjusting downwards, the rotating plate 142 will be rotated to move the magnetic block 143 away from the long magnetic strip 144. After leaving the magnetic field of the long magnetic strip 144, the connecting block 141 will move the magnetic block 143 away through the torsion spring between it and the rotating plate 142. The rotating plate 142 will then rotate to approach the limiting plate 145 for limiting, preventing the probe from shifting or the angle from deviating due to vibration of the unit or shaking of the pipeline. This will also prevent the ultrasonic signal from attenuating or the path from changing and causing the oil content measurement to drift. It will ensure that the probe and the pipe wall are in continuous close contact, eliminate signal distortion caused by gaps, and ensure that the measurement data is stable and reliable. After the sliding ring 4 moves to another position via the guide wheel 13, the operator needs to work on the sliding ring 4. At this time, the operator rotates the threaded rod 147. The threaded rod 147 will move closer to the pipeline through the threaded connection between it and the mounting plate 146. The threaded rod 147 drives the soft contact plate 149 to move. The movement of the soft contact plate 149 will be softly fixed to the outer wall of the pipeline through the rubber ring. The limiting rod 148 limits the soft contact plate 149 to prevent the equipment from deviating during operation. During adjustment, the threaded rod 147 is rotated in the opposite direction. The threaded rod 147 will drive the soft contact plate 149 away from the pipeline surface, which can maintain the tight fit between the probe and the outer wall of the pipeline, eliminate air gaps, ensure stable sound energy transmission, improve the accuracy and repeatability of oil content detection, reduce the difficulty of on-site installation and commissioning, reduce the frequency of later maintenance and recalibration, and improve the reliability and anti-interference ability of the device for long-term continuous operation under complex working conditions.

[0029] Example 3: Please refer to Figures 7-8 Based on the above embodiments, in another embodiment of the present invention, the ultrasonic density meter for analyzing the oil content of refrigerant further includes an anti-detachment mechanism 15 installed on the ultrasonic detection head 3 to prevent the ultrasonic detection head 3 from detaching during operation. The anti-drop mechanism 15 includes a fixed plate 151 mounted on the ultrasonic detection head 3, a connecting rod 152 mounted on the fixed plate 151, an arc plate 153 mounted on the connecting rod 152, and a baffle 154 mounted on the arc plate 153. A spring is provided between the arc plate 153 and the fixed plate 151. The arc plate 153 contacts the outer wall of the quick-release line 2, and the baffle 154 contacts the outer wall of the quick-release line 2.

[0030] The ultrasonic density meter used for refrigerant oil content analysis also includes a limiting mechanism mounted on the arc plate 153 to prevent loosening when the baffle 154 is connected. The limiting mechanism includes a rotating rod 155 mounted on the arc plate 153, a snap-fit ​​roller 156 mounted on the rotating rod 155, and a limiting block 157 mounted on the arc plate 153.

[0031] A torsion spring is provided between the rotating rod 155 and the arc plate 153, and the snap-fit ​​roller 156 contacts the outer wall of the limiting block 157.

[0032] In this embodiment, when the ultrasonic detection head 3 is installed on the quick-release line 2, in order to ensure the stability of the ultrasonic detection head 3 during adjustment on the sliding ring 4, the arc plate 153 will approach the installation head of the quick-release line 2 through the spring between it and the fixed plate 151. The arc plates 153 on both sides will slide along the outer wall of the connecting rod 152 and approach each other. The arc plates 153 will drive the baffles 154 on both sides to connect the quick-release line 2, which can ensure that the probe is always in close contact with the pipe wall, maintain a stable acoustic coupling state, reduce measurement errors, improve detection accuracy and data consistency, ensure long-term stable online operation of the device, and provide continuous and reliable measurement basis for the safety monitoring of the refrigeration system. When the arc plates 153 approach each other, to prevent the arc plates 153 from loosening, the movement of the arc plates 153 drives the movement of the limiting block 157. The movement of the limiting block 157 will cause it to contact the outer wall of the clamping roller 156 through the inclined surface. After contact, the limiting block 157 squeezes the clamping roller 156, and the clamping roller 156 rotates under the pressure. The rotation of the clamping roller 156 will drive the rotating rod 155 to rotate. When the limiting block 157 continues to move, the clamping roller 156 will enter the clamping groove of the limiting block 157 to limit the arc plate 153. After that, the operator will manually rotate the rotating rod 155. The rotation of the rotating rod 155 will drive the clamping roller 156 to leave the clamping groove of the limiting block 157. At this time, pulling the arc plate 153 can replace the ultrasonic detection head 3. It can maintain a constant ultrasonic propagation path and coupling state, prevent signal loss and measurement failure due to detachment or loosening, and ensure the authenticity and reliability of the refrigerant oil content data. It can also reduce the risk of equipment damage, save the workload of frequent resets and re-adjustments, and improve the safety and stability of the device operation.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic density meter for analyzing the oil content of refrigerant, comprising a control meter (1), wherein a quick-release cable (2) is fixedly installed at the detection end of the control meter (1), and an ultrasonic detection head (3) is fixedly installed on the side of the quick-release cable (2) away from the control meter (1), characterized in that, The ultrasonic density meter used for refrigerant oil content analysis also includes: A rotary adjustment detection mechanism is installed on the ultrasonic detection head (3), and the rotary adjustment detection mechanism is used to perform multi-segment adjustment detection; The rotation adjustment detection mechanism includes a sliding ring (4) mounted on the ultrasonic detection head (3), a slide rail (5) mounted on the sliding ring (4), a snap-fit ​​block (6) mounted on the tail end of the sliding ring (4), a sliding rod (7) mounted on the initial end of the sliding ring (4), a sliding block (8) mounted on the sliding rod (7), and a pull block (9) mounted on the side of the sliding rod (7) away from the sliding block (8). The slide rail (5) is slidably embedded in the interior of the ultrasonic detection head (3). A sliding groove is provided inside the sliding ring (4). The outer wall of the sliding block (8) contacts the sliding groove inside the sliding ring (4). A spring is provided between the sliding block (8) and the sliding ring (4). The pull block (9) contacts the outer wall of the sliding ring (4). A snap-fit ​​groove is provided inside the snap-fit ​​block (6). The outer wall of the sliding block (8) contacts the snap-fit ​​groove of the snap-fit ​​block (6). The outer wall of the snap-fit ​​block (6) contacts the initial end of the sliding ring (4).

2. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 1, characterized in that: The ultrasonic densitometer used for analyzing the oil content of refrigerant also includes an elastic sliding mechanism mounted on the slide rail (5) for sliding adjustment on the pipeline; The elastic sliding mechanism includes a mounting shell (10) mounted on the slide rail (5), a moving rod (11) mounted inside the mounting shell (10), a pressure plate (12) mounted on the moving rod (11), and a guide wheel (13) mounted inside the moving rod (11).

3. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 2, characterized in that: The mounting shell (10) is fixedly connected to the outer wall of the sliding ring (4), a spring is provided between the mounting shell (10) and the pressure plate (12), and the circumferential surface of the guide wheel (13) is in contact with the pipe.

4. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 1, characterized in that: The ultrasonic density meter used for refrigerant oil content analysis also includes a positioning mechanism (14) installed on the ultrasonic detection head (3) for magnetic positioning of the ultrasonic detection head (3) during detection. The positioning mechanism (14) includes a connecting block (141) mounted on the ultrasonic detection head (3), a rotating plate (142) mounted on the connecting block (141), a magnetic block (143) mounted on the rotating plate (142), a long magnetic strip (144) mounted on the sliding ring (4), and a limiting plate (145) mounted on the ultrasonic detection head (3). A torsion spring is provided between the connecting block (141) and the rotating plate (142), and the magnetic block (143) contacts the outer wall of the long magnetic strip (144).

5. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 1, characterized in that: The ultrasonic density meter used for refrigerant oil content analysis also includes a reinforcement mechanism installed on the sliding ring (4) to prevent the sliding ring (4) from loosening during operation; The reinforcement mechanism includes a mounting plate (146) mounted on the sliding ring (4), a threaded rod (147) mounted inside the mounting plate (146), a limiting rod (148) mounted on the mounting plate (146), and a soft contact plate (149) mounted on the limiting rod (148).

6. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 5, characterized in that: The outer wall of the threaded rod (147) is provided with a threaded groove. The threaded rod (147) is threadedly connected to the mounting plate (146). The threaded rod (147) is rotatably connected to the outer wall of the soft contact plate (149). The outer wall of the soft contact plate (149) is in contact with the pipe. The fixed end of the soft contact plate (149) is provided with a rubber ring.

7. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 6, characterized in that: The ultrasonic density meter used for refrigerant oil content analysis also includes an anti-detachment mechanism (15) installed on the ultrasonic detection head (3) to prevent the ultrasonic detection head (3) from detaching during operation. The anti-drop mechanism (15) includes a fixed plate (151) installed on the ultrasonic detection head (3), a connecting rod (152) installed on the fixed plate (151), an arc plate (153) installed on the connecting rod (152), and a baffle (154) installed on the arc plate (153). A spring is provided between the arc plate (153) and the fixed plate (151). The arc plate (153) contacts the outer wall of the quick disassembly line (2), and the baffle (154) contacts the outer wall of the quick disassembly line (2).

8. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 7, characterized in that: The ultrasonic density meter for analyzing the oil content of refrigerant also includes a limiting mechanism installed on the arc plate (153) to prevent loosening when the baffle (154) is connected. The limiting mechanism includes a rotating rod (155) mounted on the arc plate (153), a snap-fit ​​roller (156) mounted on the rotating rod (155), and a limiting block (157) mounted on the arc plate (153).

9. The ultrasonic density meter for analyzing the oil content of refrigerant according to claim 8, characterized in that: A torsion spring is provided between the rotating rod (155) and the arc plate (153), and the snap-fit ​​roller (156) contacts the outer wall of the limiting block (157).

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