A snap-on quick-mount probe uniform velocity tube flowmeter

Abstract

The application relates to a snap-on quick-mounting probe constant-speed tube flowmeter, and relates to the technical field of flowmeters. The flowmeter is used for solving the problem that the flowmeter needs to be replaced as a whole when the flowmeter is damaged. The flowmeter comprises a main pipe body, a probe mounting cavity is formed in the main pipe body, a detection probe is detachably arranged in the probe mounting cavity, the detection probe comprises a probe body and a quick-release mechanism, the quick-release mechanism comprises a metal supporting rod, a spring and a spherical head, the metal supporting rod is connected to the probe body shell, the metal supporting rod is a hollow structure, one end of the spring is connected to the metal supporting rod, the other end of the spring extends out of the metal supporting rod and is fixedly connected with the spherical head, the spherical head abuts against the inner wall of the probe mounting cavity, a positioning hole for positioning the spherical head is formed in the inner wall of the probe mounting cavity, and a sealing sleeve pipe for being connected with a ball valve is arranged on the outer side of the main pipe body. The application realizes quick dismounting and mounting of the detection probe, the detection probe does not need to be replaced as a whole, and the maintenance period is shortened.

Description

Technical Field

[0001] This application relates to the field of flow meter technology, and in particular to a snap-fit ​​quick-release probe averaging pitot tube flow meter. Background Technology

[0002] Averaging pitot tube flowmeters are widely used for measuring gas and liquid flow in large-diameter pipelines due to their simple structure and low pressure loss. In industries such as metallurgy and chemical engineering, they are often used to measure corrosive media containing solid particles, such as blast furnace gas and coke oven gas. Existing averaging pitot tube flowmeters typically adopt an integrated welded structure, that is, the detection probe and the main body of the flowmeter are welded together as a whole.

[0003] In practical applications, when measuring corrosive media or media containing hard particles, the erosion and corrosion of the probe's flow-facing surface by the medium are extremely severe, easily causing pinholes, leaks, or even breakage at the probe location. This leads to pressure tapping failure, a sharp drop in measurement accuracy, or even complete inaccuracy. Once the probe is damaged, due to its integrated structure, it cannot be replaced individually. The traditional repair method is to weld the damaged area, but welding alters the original structure and dimensions of the probe, compromising its aerodynamic characteristics and causing changes in the flow coefficient. Even if the leak is repaired, the measurement accuracy cannot be guaranteed. The entire flowmeter rod must be removed from the pipeline and returned to the factory for repair or scrapped and replaced entirely. This not only results in a long repair cycle but also high costs and disrupts production continuity. Utility Model Content

[0004] To address the issue of needing to replace the entire flow meter when it is damaged, this application provides a snap-on quick-release probe averaging pitot tube flow meter.

[0005] The snap-fit ​​quick-release probe averaging pitot tube flow meter provided in this application adopts the following technical solution: A snap-on quick-release probe averaging pitot tube flow meter includes a main pipe body with a probe mounting cavity. A detection probe is detachably mounted inside the probe mounting cavity. The detection probe includes a probe body and a quick-release mechanism. The quick-release mechanism includes a metal support rod, a spring, and a ball head. The metal support rod is connected to the probe body housing and has a hollow structure. One end of the spring is connected inside the metal support rod, and the other end of the spring extends out of the metal support rod and is fixedly connected to the ball head. The ball head abuts against the inner wall of the probe mounting cavity. A positioning hole for positioning the ball head is provided through the inner wall of the probe mounting cavity. A sealing sleeve for connection with a ball valve is fitted outside the main pipe body.

[0006] Because it is an integrated structure, the probe cannot be replaced individually. The traditional repair method is to weld the damaged area. However, welding will change the original structure and dimensions of the probe, destroy its aerodynamic characteristics, and cause changes in the flow coefficient. Even if the leak is repaired, its measurement accuracy cannot be guaranteed. The entire flowmeter rod must be removed from the pipeline and returned to the factory for repair or scrapped and replaced as a whole. This not only has a long maintenance cycle but also high costs and affects the continuity of production. By adopting the above technical solution, including the main pipe body, the detection probe can be detachably installed in the probe mounting cavity of the main pipe body. The detection probe includes a probe body and a quick-release mechanism. The quick-release mechanism includes a metal support rod, a spring, and a ball head. The positioning hole is opened through the probe mounting cavity, and the sealing sleeve is installed on the outside of the main pipe body. When installing the flow meter probe, pre-install the base short pipe on the pipeline and connect the ball valve to the base short pipe. Pre-install the sealing sleeve on the ball valve, which is already fixed to the pipeline. At this point, the threaded sealing sleeve and the ball valve are in a preliminary connection state, but not yet tightened, to facilitate subsequent overall installation. Hold the quick-release probe assembly and align the ball head on the quick-release probe assembly with the axial guide groove of the main pipe body. Then, forcefully insert the probe into the probe mounting cavity of the main pipe body. During insertion, when the ball head contacts the inner wall of the probe mounting cavity, it will be pressed back by the inner wall and slide along the axial guide groove. When the probe is inserted into place, the spherical head pops out under the action of the internal spring and accurately locks into the positioning hole, at which point a clicking sound will be made. The detection probe has been pre-fixed on the main body. The sealing sleeve pre-installed on the ball valve is screwed upwards onto the main body. During the tightening process, the inner top surface of the sealing sleeve will strongly press against the pressure shoulder of the detection probe. As the pressure increases, the first sealing ring installed between the rear of the probe and the sealing sleeve is fully compressed to form the main seal. At the same time, the second sealing ring is installed at the bottom of the sealing sleeve and tightly pressed against the ball valve interface to form an environmental seal. The installation is complete.

[0007] When the flow meter probe is damaged and needs to be disassembled, close the ball valve on the pipeline to isolate the medium in the pipeline from the outside. Remove the second sealing ring and loosen the sealing sleeve. The pressure on the shoulder of the detection probe will be gradually released, and the sealing sleeve will separate from the main body. Use a tool to press the ball head inward from the positioning holes on both sides, so that the ball head overcomes the elastic force of the internal spring and retracts towards the probe body, disengaging from the positioning hole. Pull the probe assembly out of the mounting cavity of the main body. At this time, the pulled-out probe assembly can be replaced, repaired, or inspected. By using the main body, detection probe, positioning hole, and sealing sleeve, the detection probe can be quickly disassembled and assembled, effectively ensuring production continuity without the need for complete scrapping and replacement, shortening the maintenance cycle and reducing maintenance costs. At the same time, the sealing sleeve achieves internal high-pressure main sealing and external environmental sealing, effectively preventing media leakage and dust and moisture intrusion, thus improving the service life of the equipment in harsh environments.

[0008] Optionally, the number of quick-release mechanisms is two sets, and the two sets of quick-release mechanisms are symmetrically arranged on both sides of the probe body. The number of positioning holes is the same as the number of quick-release mechanisms.

[0009] By adopting the above technical solution, two sets of quick-release mechanisms are used. By setting the number of quick-release mechanisms, the stability of the probe installation is further enhanced, and the installation deviation caused by unilateral force is effectively reduced. On the basis of realizing quick assembly and disassembly by a single person, the reliability of operation is improved.

[0010] Optionally, the probe mounting cavity of the main body has an axial guide groove for the spherical head to slide on its inner wall, and the positioning hole is located at the end of the axial guide groove.

[0011] By adopting the above technical solution, the axial guide groove is opened in the probe mounting cavity; the axial guide groove guides the probe to the installation position, reducing the installation difficulty and making the operation convenient. The axial guide groove provides a precise sliding trajectory for the spherical head, ensuring the positioning accuracy of the probe installation.

[0012] Optionally, the cross-sectional shape of the axial guide groove matches the spherical head, and the depth of the axial guide groove is sufficient to accommodate the sliding of the spherical head and prevent the probe body from rotating within the probe mounting cavity.

[0013] By adopting the above technical solution, the cross-sectional shape of the axial guide groove matches the spherical head; by setting the size of the axial guide groove, the sliding process is further ensured to be smooth, the jamming phenomenon during installation is reduced, and the installation accuracy is improved.

[0014] Optionally, the front part of the detection probe is a streamlined front-flow detection part, and the front part of the detection probe is provided with a pressure tapping hole. The rear part of the detection probe is a cylindrical sealing connection part. A first sealing ring is provided on the outer periphery of the rear part of the detection probe and a pressure shoulder is formed. The inner top surface of the sealing sleeve is used to press the pressure shoulder of the detection probe during assembly, so that the first sealing ring is deformed by pressure to form a seal.

[0015] By adopting the above technical solution, the front part of the detection probe is a streamlined frontal detection part, and the rear part of the detection probe is a cylindrical sealing connection part. A first sealing ring is set on the outer periphery of the rear part of the detection probe and a pressure shoulder is formed. Through the setting of the first sealing ring, a reliable seal is formed between the detection probe and the sealing sleeve, which can effectively prevent the leakage of the medium in the pipeline, and also prevent the intrusion of external impurities, thus extending the service life of the equipment.

[0016] Optionally, the rear of the detection probe is provided with a mounting groove for installing the first sealing ring.

[0017] By adopting the above technical solution, the mounting groove is opened at the rear of the detection probe; the mounting groove provides positioning for the first sealing ring, effectively preventing the sealing ring from shifting during installation or use.

[0018] Optionally, the bottom of the sealing sleeve is provided with a second sealing ring for pressing against the interface end face of the pipeline ball valve, and the top of the sealing sleeve is provided with a third sealing ring for sealing with the main pipe body.

[0019] By adopting the above technical solution, the second sealing ring and the third sealing ring are installed at the bottom and top of the sealing sleeve, respectively. With the setting of the second sealing ring and the third sealing ring, the second sealing ring can be tightly pressed against the interface end face of the pipeline ball valve, ensuring the high-pressure main sealing performance inside the system. The third sealing ring achieves a reliable seal with the main body, preventing dust, moisture and other impurities from the external environment from entering the interior.

[0020] Optionally, the upper end of the sealing sleeve is provided with an internal thread for engaging with the main pipe thread, and the lower end of the sealing sleeve is provided with an external thread for engaging with the pipe ball valve thread.

[0021] By adopting the above technical solution, the upper end of the sealing sleeve is provided with an internal thread, and the lower end of the sealing sleeve is provided with an external thread. The setting of the internal and external threads enables the sealing sleeve to achieve a stable threaded connection with the main body and the pipeline ball valve. Assembly can be completed quickly by rotation, which improves installation efficiency and effectively prevents loosening of the connection, ensuring a tight connection.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By setting up the main body, detection probe, positioning hole and sealing sleeve, the detection probe can be quickly disassembled and assembled, effectively ensuring production continuity, eliminating the need for complete scrapping and replacement, shortening the maintenance cycle and reducing maintenance costs. At the same time, the sealing sleeve realizes the internal high pressure main seal and external environment seal, effectively preventing media leakage and dust and moisture intrusion, and improving the service life of the equipment in harsh environments. 2. The axial guide groove guides the probe to the installation position, reducing the installation difficulty and making the operation convenient. The axial guide groove provides a precise sliding trajectory for the ball head, ensuring the positioning accuracy of the probe installation. 3. With the setting of the second and third sealing rings, the second sealing ring can be tightly pressed against the interface end face of the pipeline ball valve, ensuring the high-pressure main sealing performance inside the system, and the third sealing ring achieves a reliable seal with the main body, preventing dust, moisture and other impurities from the external environment from entering the interior. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a snap-fit ​​quick-release probe averaging pitot tube flowmeter in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram illustrating the installation of the main body and the detection probe in the embodiments of this application.

[0025] Figure 3 This is a schematic diagram of the streamlined front-flow detection section at the front of the probe body in an embodiment of this application.

[0026] Explanation of reference numerals in the attached drawings: 1. Main body; 2. Probe mounting cavity; 3. Detection probe; 31. Probe body; 32. Quick release mechanism; 321. Metal support rod; 322. Spring; 323. Spherical head; 4. Positioning hole; 5. Sealing sleeve; 6. Axial guide groove; 7. First sealing ring; 8. Mounting groove; 9. Second sealing ring; 10. Third sealing ring; 11. Ball valve; 12. Short pipe. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0028] This application discloses a snap-fit ​​quick-release probe averaging pitot tube flow meter. (Refer to...) Figure 1 The snap-on quick-install probe averaging pitot tube flowmeter includes a main pipe body 1, which has a probe mounting cavity 2. A detection probe 3 is detachably installed in the probe mounting cavity 2. In this embodiment, the main pipe body 1 is also equipped with a pressure tapping channel. The pressure tapping channel is the existing structure of the averaging pitot tube flowmeter. The pressure tapping channel inside the main pipe body 1 is not the same structure as the probe mounting cavity. The pressure tapping channel is a closed pipe independent of the probe and the pipe. Its core function is to transmit the pressure signal collected by the detection probe 3 to the differential pressure transmitter.

[0029] Reference Figure 1 and Figure 2 The detection probe 3 includes a probe body 31 and a quick-release mechanism 32. The quick-release mechanism 32 includes a metal support rod 321, a spring 322 and a spherical head 323. The metal support rod 321 is connected to the outer shell of the probe body 31 and has a hollow structure. One end of the spring 322 is connected inside the metal support rod 321, and the other end of the spring 322 extends out of the metal support rod 321 and is fixedly connected to the spherical head 323. The spherical head 323 abuts against the inner wall of the probe mounting cavity 2.

[0030] Reference Figure 1 and Figure 2The probe mounting cavity 2 of the main body 1 has an axial guide groove 6 on its inner wall. The axial guide groove 6 allows the spherical head 323 to slide. At the same time, a positioning hole 4 is provided through the end of the axial guide groove 6. When the spherical head 323 is compressed, the spring 322 is compressed until the spherical head 323 moves to the positioning hole 4. The spring 322 acts on the spherical head 323 to make it pop outward. The spherical head 323 can be positioned through the positioning hole 4 and protrude outside the main body 1. The axial guide groove 6 guides the probe to the installation position, reducing the installation difficulty and making the operation convenient. The axial guide groove 6 provides a precise sliding trajectory for the spherical head 323, ensuring the positioning accuracy of the probe installation.

[0031] Reference Figure 1 In this embodiment, the cross-sectional shape of the axial guide groove 6 matches the spherical head 323, and the depth of the axial guide groove 6 can accommodate the sliding of the spherical head 323 and prevent the probe body 31 from rotating in the mounting cavity; this further ensures smooth sliding, reduces jamming during installation, and improves installation accuracy.

[0032] Reference Figure 1 There are two sets of quick-release mechanisms 32, which are symmetrically arranged on both sides of the probe body 31. The number of axial guide grooves 6 and positioning holes 4 is the same as the number of quick-release mechanisms 32. This further enhances the stability of probe installation, effectively reduces installation deviation caused by unilateral force, and improves the reliability of operation while enabling quick installation and removal by a single person.

[0033] Reference Figure 1 A sealing sleeve 5 is fitted around the main pipe body 1. The upper end of the sealing sleeve 5 has an internal thread for threaded engagement with the main pipe body 1, and the lower end of the sealing sleeve 5 has an external thread for threaded engagement with the pipe ball valve 11. A certain gap is reserved between the sealing sleeve 5 and the main pipe body 1 to avoid affecting the ejection of the ball head 323 from the positioning hole 4. In this embodiment, the ball valve 11 is an existing structure. When the averaging pitot tube flow meter is used, the ball valve 11 is pre-installed on the pipeline through the short pipe 12. The internal and external threads enable the sealing sleeve 5 to achieve a stable threaded connection with the main pipe body 1 and the pipe ball valve 11. Assembly can be quickly completed by rotation, which improves installation efficiency and effectively prevents loosening of the connection, ensuring a tight connection.

[0034] Reference Figure 1 Meanwhile, a second sealing ring 9 is installed at the bottom of the sealing sleeve 5 to press against the interface end face of the pipeline ball valve 11, and a third sealing ring 10 is installed at the top of the sealing sleeve 5 to seal against the main body 1. The second sealing ring 9 can be tightly pressed against the interface end face of the pipeline ball valve 11 to ensure the high-pressure main sealing performance inside the system. The third sealing ring 10 achieves a reliable seal with the main body 1, preventing dust, moisture and other impurities in the external environment from entering the interior.

[0035] Reference Figure 1 and Figure 3 The front part of the detection probe 3 is a streamlined front-flow detection part with a pressure tapping hole. The rear part of the detection probe 3 is a cylindrical sealing connection part. A first sealing ring 7 is provided on the outer periphery of the rear part of the detection probe 3, forming a pressure shoulder. A corresponding ring is formed on the inner top surface of the sealing sleeve 5. The inner top surface of the sealing sleeve 5 is used to press the pressure shoulder of the detection probe 3 during assembly, so that the first sealing ring 7 is deformed under pressure to form a seal. A reliable seal is formed between the detection probe 3 and the sealing sleeve 5, which can effectively prevent the leakage of the medium in the pipeline, avoid the intrusion of external impurities, and extend the service life of the equipment.

[0036] Reference Figure 2 Meanwhile, the rear of the detection probe 3 is provided with an installation groove 8 for the first sealing ring 7 to be installed; the installation groove 8 provides positioning for the first sealing ring 7 and effectively prevents the sealing ring from shifting during installation or use.

[0037] The implementation principle of a snap-fit ​​quick-install probe averaging pitot tube flowmeter according to an embodiment of this application is as follows: When the flowmeter probe is to be installed, a base short pipe 12 is pre-installed on the pipeline, and a ball valve 11 is connected to the base short pipe 12. A sealing sleeve 5 is pre-installed on the ball valve 11, which is already fixed on the pipeline. At this time, the threaded sealing sleeve 5 and the ball valve 11 are in a preliminary connection state, but have not yet been tightened, in order to facilitate subsequent overall installation operations. Holding the quick-install probe assembly, the ball head 323 on the quick-install probe assembly is aligned with the axial guide groove 6 of the main pipe body 1, and then the detection probe 3 is forcefully inserted into the probe mounting cavity 2 of the main pipe body 1. During the insertion process, when the ball head 323 contacts the inner wall of the probe mounting cavity 2... The probe will be pressed back by the inner wall and slide along the axial guide groove 6. When the probe is inserted into place, the ball head 323 will pop out under the action of the internal spring 322 and accurately lock into the positioning hole 4. At this time, a clicking sound will be made. The detection probe 3 has been pre-fixed on the main body 1. The sealing sleeve 5 pre-installed on the ball valve 11 is screwed upward to the main body 1. During the tightening process, the inner top surface of the sealing sleeve 5 will strongly press the pressure shoulder of the detection probe 3. As the pressure increases, the first sealing ring 7 installed between the rear of the probe and the sealing sleeve 5 is fully compressed to form the main seal. At the same time, the second sealing ring 9 is installed at the bottom of the sealing sleeve 5 and tightly pressed on the interface of the ball valve 11 to form an environmental seal. The installation is complete.

[0038] When the flow meter probe is damaged and needs to be disassembled, close the ball valve 11 on the pipeline to isolate the medium in the pipeline from the outside. Remove the second sealing ring 9 and loosen the sealing sleeve 5. The pressure on the shoulder of the detection probe 3 will be gradually released, and the sealing sleeve 5 will separate from the main body 1. Use a tool to press the ball head 323 inward from the positioning holes 4 on both sides, so that the ball head 323 overcomes the elastic force of the internal spring 322 and retracts towards the probe body 31, disengaging from the positioning hole 4. Pull the probe assembly out of the mounting cavity of the main body 1. At this time, the pulled-out probe assembly can be replaced, repaired or inspected. By using the main body 1, detection probe 3, positioning hole 4 and sealing sleeve 5, the detection probe 3 can be quickly disassembled and assembled, effectively ensuring production continuity without the need for complete scrapping and replacement, shortening the maintenance cycle and reducing maintenance costs. At the same time, the sealing sleeve 5 achieves internal high-pressure main sealing and external environmental sealing, effectively preventing media leakage and dust and moisture intrusion, and improving the service life of the equipment in harsh environments.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A snap-fit ​​quick-release probe averaging pitot tube flow meter, characterized in that: The device includes a main body with a probe mounting cavity. A detection probe is detachably mounted inside the probe mounting cavity. The detection probe includes a probe body and a quick-release mechanism. The quick-release mechanism includes a metal support rod, a spring, and a ball head. The metal support rod is connected to the probe body housing and has a hollow structure. One end of the spring is connected inside the metal support rod, and the other end of the spring extends out of the metal support rod and is fixedly connected to the ball head. The ball head abuts against the inner wall of the probe mounting cavity. The inner wall of the probe mounting cavity has a positioning hole for positioning the ball head. A sealing sleeve for connecting to a ball valve is fitted outside the main body.

2. The snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 1, characterized in that: The quick-release mechanism consists of two sets, which are symmetrically arranged on both sides of the probe body. The number of positioning holes is the same as the number of quick-release mechanisms.

3. The snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 1, characterized in that: The probe mounting cavity of the main body has an axial guide groove on its inner wall for the spherical head to slide, and the positioning hole is located at the end of the axial guide groove.

4. The snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 3, characterized in that: The cross-sectional shape of the axial guide groove matches the spherical head, and the depth of the axial guide groove is sufficient to accommodate the sliding of the spherical head and prevent the probe body from rotating within the probe mounting cavity.

5. A snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 1, characterized in that: The front part of the detection probe is a streamlined front-flow detection part, and a pressure tapping hole is opened at the front part of the detection probe. The rear part of the detection probe is a cylindrical sealing connection part. A first sealing ring is provided on the outer periphery of the rear part of the detection probe and a pressure shoulder is formed. The inner top surface of the sealing sleeve is used to press the pressure shoulder of the detection probe during assembly, so that the first sealing ring is deformed by pressure to form a seal.

6. The snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 5, characterized in that: The detection probe has a mounting groove at the rear for installing the first sealing ring.

7. A snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 5, characterized in that: The bottom of the sealing sleeve is provided with a second sealing ring for pressing against the interface end face of the pipeline ball valve, and the top of the sealing sleeve is provided with a third sealing ring for sealing with the main body.

8. A snap-fit ​​quick-release probe averaging pitot tube flowmeter according to claim 1, characterized in that: The upper end of the sealing sleeve is provided with an internal thread for mating with the main pipe thread, and the lower end of the sealing sleeve is provided with an external thread for mating with the pipe ball valve thread.

Images