Quick connection sealing structure for inlet and outlet of flowmeter

Abstract

The utility model discloses a flowmeter import and export quick -joint sealing structure relates to flowmeter technical field, including measuring pipe, vortex generator and the quick -joint sealing structure of measuring pipe both ends, and quick -joint sealing structure contains connecting sleeve, nut pressure cover and outer pipe cover. The one end of connecting sleeve is connected measuring pipe, and the other end is equipped with the sealing groove of sealing ring and has outer thread on the outer wall, the inner wall of nut pressure cover has internal thread and inner pressure ring, and is cooperated with the thread of connecting sleeve, the outer pipe cover is installed in the nut pressure cover, and the outer wall is equipped with outer pressure ring, and one end has the pressing end face. When assembling, rotate nut pressure cover, and inner pressure ring extrudes outer pressure ring and makes the pressing end face compact sealing ring and realizes the sealing, and when disassembling, can release the nut. The structure is convenient and efficient to disassemble, need not many bolts or rely on winding sealing element, and the sealing performance is stable, and sealing ring fully changes and forms reliable sealing, and each component stress is reasonable, and the durability is strong, and the outer pipe cover can adapt to various external pipe fittings, and the versatility is good.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, specifically to a quick-connect sealing structure for the inlet and outlet of a flow meter. Background Technology

[0002] Eddy flow meters are widely used for flow measurement of media such as gas and liquid due to their advantages of simple structure and high measurement accuracy. Their core components include the measuring tube and the eddy current generator on the tube. The reliability of the sealing connection between the measuring tube inlet and outlet and the external pipe fittings directly affects the measurement accuracy and ease of use.

[0003] Existing eddy flow meters mostly use flange connections or direct threaded connections for inlet and outlet. Flange connections require multiple bolts and nuts, and each fastener must be tightened individually during disassembly and assembly, which is cumbersome and time-consuming. Although direct threaded connections have a relatively simple structure, their sealing performance depends on the thread accuracy and the wrapping process of the sealing tape / Teflon tape. After long-term use, the seal is prone to failure due to thread wear, and the threads are easily stripped during disassembly and assembly, affecting the reliability of the connection.

[0004] To address the aforementioned issues, there is an urgent need for a flow meter inlet and outlet connection structure that is easy to assemble and disassemble and has stable sealing performance, in order to improve the efficiency of flow meter installation and maintenance and ensure sealing reliability during long-term use. Utility Model Content

[0005] To address the shortcomings in the prior art, this utility model provides a quick-connect sealing structure for the inlet and outlet of a flow meter.

[0006] The technical solution adopted by this utility model is: a quick-connect sealing structure for the inlet and outlet of a flow meter, including a measuring tube and an eddy current generator on the measuring tube. The inlet and outlet at both ends of the measuring tube are provided with quick-connect sealing structures, and the quick-connect sealing structure includes a connecting sleeve, a nut sleeve and an outer sleeve. One end of the connecting sleeve is connected to the end of the measuring tube, and at least one sealing groove is provided on the end face of the other end. A sealing ring is provided in the sealing groove, and the sealing ring protrudes from the end surface of the connecting sleeve. The outer wall of the connecting sleeve is provided with external threads. The inner wall of the nut sleeve is provided with an internal thread that is threadedly connected to the external thread, and an inner pressure ring is provided on the inner wall of the end of the nut sleeve away from the connecting sleeve. The outer sleeve is fitted inside the nut sleeve. One end of the outer sleeve has a pressing end face that presses against the sealing ring. The outer wall of the outer sleeve is provided with an outer pressure ring that presses against the inner pressure ring.

[0007] Furthermore, a first limiting step ring is provided on the inner wall of one end of the connecting sleeve to abut against the end of the measuring tube.

[0008] Furthermore, anti-slip vertical grooves are provided on the outer wall of the connecting sleeve away from the external thread and on the outer wall of the nut pressure sleeve, and anti-slip vertical strips are also provided on the surface of the anti-slip vertical grooves on the connecting sleeve.

[0009] Furthermore, the connecting sleeve and the measuring tube are fixedly connected by welding, interference fit, or adhesive bonding.

[0010] Furthermore, a second limiting step ring is provided on the inner wall of one end of the outer sleeve.

[0011] The beneficial effects of this utility model are: 1. Convenient and efficient assembly and disassembly: The connection between the connecting sleeve, nut sleeve and outer sleeve is achieved by tightening with threads. Only the nut sleeve needs to be rotated to complete the compression and sealing. When disassembling, the nut can be loosened to separate. Compared with traditional flanges that are fastened with multiple bolts or directly connected by threads, the operation steps are greatly simplified, the disassembly and assembly time is shortened and the installation and maintenance efficiency is improved.

[0012] 2. Stable and reliable sealing performance: The end of the connecting sleeve is equipped with a sealing groove and a protruding sealing ring. The nut sleeve compresses the outer pressure ring of the outer sleeve through the inner pressure ring, so that the pressure end face of the outer sleeve is tightly fitted with the sealing ring to form a ring seal structure. The sealing contact area is stable, avoiding the influence of process differences of traditional threaded connections that rely on the winding of sealing elements. Moreover, the protruding design of the sealing ring can ensure sufficient deformation during pressure, improve sealing reliability, and reduce the risk of media leakage.

[0013] 3. High durability of the connection structure: The sealing effect is achieved through the deformation of the sealing ring, rather than the direct force of the thread, avoiding the sealing failure problem caused by thread wear in traditional threaded connections; the threaded fit between the nut sleeve and the connecting sleeve only transmits the clamping force, and the outer sleeve is subjected to force through the pressure ring. The force of each component is reasonable, reducing the probability of failures such as stripping and wear, and extending the service life of the overall connection structure.

[0014] 4. Strong adaptability: As a connection carrier with external pipe fittings, the outer sleeve can be designed with corresponding interfaces according to the connection requirements of the external pipe fittings. There is no need to modify the main structure of the measuring tube. By replacing the outer sleeve with different specifications, it can be adapted to a variety of external pipe fittings, thus improving the versatility of the structure.

[0015] In addition to the objectives, features and advantages described above, this utility model has other objectives, features and advantages.

[0016] The present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] Figure 2This is an exploded view of the present invention.

[0019] Figure 3 This is a cross-sectional schematic diagram of the present invention.

[0020] Figure 1-3 In the middle: 1. Measuring tube; 2. Eddy current generator; 3. Connecting sleeve; 4. Nut sleeve; 5. Outer sleeve; 6. Sealing groove; 7. External thread; 8. Internal thread; 9. Inner pressure ring; 10. Pressing end face; 11. Outer pressure ring; 12. First limiting step ring; 13. Anti-slip vertical groove; 14. Anti-slip vertical strip; 15. Second limiting step ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0023] This utility model provides a quick-connect sealing structure for the inlet and outlet of a flow meter.

[0024] In this embodiment, refer to Figure 1-3 The flow meter inlet and outlet quick-connect sealing structure includes a measuring tube 1 and an eddy current generator 2 on the measuring tube. The inlet and outlet at both ends of the measuring tube are provided with quick-connect sealing structures, which include a connecting sleeve 3, a nut pressure sleeve 4 and an outer tube sleeve 5. One end of the connecting sleeve 3 is connected to the end of the measuring tube, and at least one sealing groove 6 is provided on the end face of the other end. A sealing ring is provided in the sealing groove 6. The sealing ring protrudes from the end surface of the connecting sleeve, and an external thread 7 is provided on the outer wall of the connecting sleeve. The inner wall of the nut sleeve is provided with an internal thread 8 that is threadedly connected to the external thread, and an inner pressure ring 9 is provided on the inner wall of the end of the nut sleeve away from the connecting sleeve. The outer sleeve is fitted inside the nut sleeve. One end of the outer sleeve has a pressing end face 10 that presses against the sealing ring. The outer wall of the outer sleeve is provided with an outer pressure ring 11 that presses against the inner pressure ring.

[0025] In the above technical solution, a quick-connect seal is achieved through a combination structure of a connecting sleeve, a nut sleeve, and an outer sleeve at the inlet and outlet of the measuring tube: the connecting sleeve is fixed to the measuring tube, and a sealing ring is protruding from its end sealing groove; the external thread on the outer wall and the internal thread on the inner wall of the nut sleeve form a threaded transmission pair; the inner pressure ring of the nut sleeve and the outer pressure ring of the outer sleeve form an axial pressing fit, and the pressing end face of the outer sleeve forms a sealing fit with the sealing ring. During assembly, rotating the nut sleeve drives the inner pressure ring to squeeze the outer pressure ring of the outer sleeve through threaded transmission, so that the pressing end face of the outer sleeve presses the sealing ring, forming a seal; during disassembly, rotating the nut sleeve in the opposite direction releases the pressure to separate the parts. Threaded tightening / loosening replaces traditional multi-bolt or direct threaded connections; sealing / disassembly can be completed simply by rotating the nut sleeve, greatly simplifying the operation.

[0026] Specifically, a first limiting step ring 12 is provided on the inner wall of one end of the connecting sleeve to abut against the end of the measuring tube.

[0027] In this embodiment, a first limiting step ring is added to the inner wall of one end of the connecting sleeve. When the connecting sleeve is assembled with the measuring tube, the end face of the first limiting step ring directly abuts against the end of the measuring tube to form an axial limiting reference, which limits the assembly depth of the connecting sleeve on the measuring tube.

[0028] Specifically, anti-slip vertical grooves 13 are provided on the outer wall of the connecting sleeve away from the external thread and on the outer wall of the nut sleeve, and anti-slip vertical strips 14 are also provided on the surface of the anti-slip vertical grooves 13 on the connecting sleeve.

[0029] In this embodiment, anti-slip vertical grooves are machined on the outer wall of the external thread end of the connecting sleeve and the outer wall of the nut sleeve to increase the static friction between the hand and the component; additional anti-slip vertical strips are added to the surface of the anti-slip vertical grooves of the connecting sleeve to further increase the coefficient of friction. The double anti-slip structure enhances the force transmission during gripping and rotation. At the same time, it can also act as a reinforcing rib to improve strength.

[0030] Specifically, the connecting sleeve and the measuring tube are fixedly connected by welding, interference fit, or adhesive bonding.

[0031] In this embodiment, based on the application scenario of the flow meter (such as medium pressure, temperature, and material compatibility), three different fixing methods are selected: welding, interference fit, or adhesive bonding. Welding uses high-temperature melting to combine the materials of the connecting sleeve and the measuring tube; interference fit utilizes dimensional interference during assembly to form a tight fit; adhesive bonding uses the bonding force of the adhesive to achieve a fixed connection. All three methods can achieve rigid fixing of the connecting sleeve and the measuring tube.

[0032] Specifically, a second limiting step ring 15 is provided on the inner wall of one end of the outer tube sleeve.

[0033] In this embodiment, a second limiting step ring is provided on the inner wall of one end of the outer sleeve. When the outer sleeve is connected to the external pipe fitting, the end face of the second limiting step ring abuts against the end of the external pipe fitting, limiting the depth of the external pipe fitting inserted into the outer sleeve and forming an axial positioning reference.

[0034] Attention all technical personnel: Although this utility model has been described according to the specific embodiments above, the concept of this utility model is not limited to this utility model. Any modification that utilizes the concept of this utility model will be included within the scope of protection of this patent right.

Claims

1. A quick-connect sealing structure for the inlet and outlet of a flowmeter, comprising a measuring tube and an eddy current generator on the measuring tube, characterized in that: The measuring tube is provided with quick-connect sealing structures at both ends of the inlet and outlet. The quick-connect sealing structure includes a connecting sleeve, a nut sleeve, and an outer sleeve. One end of the connecting sleeve is connected to the end of the measuring tube, and at least one sealing groove is provided on the end face of the other end. A sealing ring is provided in the sealing groove, and the sealing ring protrudes from the end surface of the connecting sleeve. The outer wall of the connecting sleeve is provided with external threads. The inner wall of the nut sleeve is provided with an internal thread that is threadedly connected to the external thread, and an inner pressure ring is provided on the inner wall of the end of the nut sleeve away from the connecting sleeve. The outer sleeve is fitted inside the nut sleeve. One end of the outer sleeve has a pressing end face that presses against the sealing ring. The outer wall of the outer sleeve is provided with an outer pressure ring that presses against the inner pressure ring.

2. The quick-connect sealing structure for the inlet and outlet of the flowmeter according to claim 1, characterized in that: A first limiting step ring is provided on the inner wall of one end of the connecting sleeve to abut against the end of the measuring tube.

3. The quick-connect sealing structure for the inlet and outlet of the flowmeter according to claim 1, characterized in that: Anti-slip vertical grooves are provided on the outer wall of the connecting sleeve away from the external thread and on the outer wall of the nut pressure sleeve. Anti-slip vertical strips are also provided on the surface of the anti-slip vertical grooves on the connecting sleeve.

4. The quick-connect sealing structure for the inlet and outlet of the flowmeter according to claim 1, characterized in that: The connecting sleeve and the measuring tube are fixedly connected by welding, interference fit, or adhesive bonding.

5. The quick-connect sealing structure for the inlet and outlet of the flowmeter according to claim 1, characterized in that: A second limiting step ring is provided on the inner wall of one end of the outer tube sleeve.

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