Natural gas flow nozzle with good sealing effect

Abstract

The utility model belongs to the technical field of nozzles, and discloses a natural gas flow nozzle with a good sealing effect. The natural gas flow nozzle with the good sealing effect comprises a nozzle head, a flow meter pipeline is arranged below the nozzle head, a first clamping ring and a second clamping ring are fixedly connected to the outer side of the nozzle head and the outer side of the flow meter pipeline respectively, and a first fixing block and a second fixing block are fixedly connected to the outer side of the first clamping ring and the outer side of the second clamping ring respectively. According to the natural gas flow nozzle with the good sealing effect, a first fixing block and a second fixing block can be connected in the rotating process of a threaded rod, so that a nozzle head and a flow meter pipeline are preliminarily connected, and when the threaded rod moves downwards, a limiting frame can be driven to move downwards and sleeve the outer side of a connecting block; further, the sealing plate is tightly attached to seal the joint of the nozzle head and the flow meter pipeline, the sealing effect is enhanced, the leakage phenomenon is prevented, and mounting and dismounting are very convenient and fast.

Description

Technical Field

[0001] This utility model relates to the technical field of nozzles, specifically to a natural gas flow nozzle with good sealing effect. Background Technology

[0002] A natural gas flow nozzle, also known as a nozzle flow meter or nozzle-type flow meter, is a device used to measure the flow rate of natural gas in a pipeline. Its basic working principle is based on the differential pressure method, that is, the flow rate is calculated by measuring the pressure difference when the gas flows through the nozzle.

[0003] The connection between the nozzle and the flow meter is generally a threaded connection or a flange connection. However, threaded connections are not specifically designed for sealing and mainly rely on the tightness of the threads and the compatibility of the sealing material, which can easily lead to leakage. At the same time, flange connections usually rely on gaskets to ensure sealing, but they can deform over time and cause leakage. Moreover, installation and disassembly are very cumbersome. Uneven tightening force can lead to uneven pressure on the sealing gasket, affecting the sealing effect. Therefore, we designed a natural gas flow nozzle with a better sealing effect. Utility Model Content

[0004] The purpose of this utility model is to provide a natural gas flow nozzle with good sealing effect. This natural gas flow nozzle with good sealing effect can ensure that the nozzle head has good sealing performance during use, and is very convenient to install and disassemble, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A natural gas flow nozzle with good sealing effect includes a nozzle head, a flow meter pipe is disposed below the nozzle head, a first retaining ring and a second retaining ring are fixedly connected to the outer sides of the nozzle head and the flow meter pipe respectively, a first fixing block and a second fixing block are fixedly connected to the outer sides of the first retaining ring and the second retaining ring respectively, a sealing plate is movably connected to the lower surface of the first retaining ring, a connecting block is fixedly connected to the outer side of the sealing plate, a through hole is provided on the side of the connecting block, a threaded rod is movably connected inside the first fixing block, and the bottom end of the threaded rod extends into the through hole, a limit frame is provided on the outer side of the upper half of the threaded rod, a movable ring is movably connected to the outer side of the upper half of the threaded rod, a connecting rod is fixedly connected to the outer side of the movable ring, the end of the connecting rod away from the movable ring is fixedly connected to the inner wall of the limit frame, and a movable groove is also provided on the upper surface of the connecting block and communicates with the through hole.

[0006] Through the above technical solution, this application places the sealing plate on the nozzle head onto the outside of the flow meter pipe, so that the sealing plate contacts the outside of the flow meter pipe. At this time, the threaded rod on the first fixing block is inserted into the through hole of the connecting block. The threaded rod is rotated to screw it into the second fixing block to initially connect the nozzle head and the flow meter pipe, so that they fit together to complete the seal. During the downward movement of the threaded rod, the limiting frame will move downward with it. Due to the movable design of the limiting frame, it can not rotate with the threaded rod, but only move downward and fit onto the outside of the connecting block. Through the design of the movable groove, the connecting rod in the limiting frame can slide freely in the movable groove. At the same time, the movable ring can also move freely in the through hole without being affected, so that the connecting blocks fit tightly together. In turn, the sealing plate is tightly pressed against the contact surface of the nozzle head and the flow meter pipe to seal. Double sealing is completed in one step, which not only enhances the sealing effect and prevents leakage, but also facilitates disassembly and maintenance.

[0007] Preferably, there are two of each of the first and second fixing blocks, which are respectively distributed on both sides of the first and second retaining rings, and the first and second fixing blocks have the same shape.

[0008] Through the above technical solution, the design of multiple first and second fixing blocks in this application can enhance the sealing effect between the nozzle head and the flow pipe, and the force is uniform, resulting in a better sealing effect.

[0009] Preferably, there are two sealing plates that are in contact with each other, and the connecting block is located on the front and rear sides of the sealing plates and between the first fixing block and the second fixing block.

[0010] Through the above technical solution, the connecting blocks on the front and rear sides of this application come into contact with each other, thereby allowing the limiting frame to fit tightly on the outside of the two connecting blocks, thus completing the limiting of the sealing plate.

[0011] Preferably, the connecting block is an L-shaped metal block, the shape of the limiting frame is adapted to the shape of the connecting block, and the side of the connecting block is designed to be inclined.

[0012] Through the above technical solution, the inclined design of the side of the connecting block in this application allows the limiting frame to squeeze the connecting block as it moves downward, so that it gradually contacts the limiting frame and ultimately achieves a tight fit.

[0013] Preferably, the thread on the threaded rod is located in the lower half of the threaded rod, and the diameter of the through hole is larger than the diameter of the threaded rod.

[0014] With the above technical solution, the threaded rod of this application will not come into contact with the connecting block when it is inserted into the connecting block, and will not be affected when the threaded rod is turned, so that it gradually moves downward and is finally screwed into the second fixing block to complete the connection.

[0015] Preferably, a sealing gasket is fixedly connected to and in contact with the bottom end of the nozzle head and the top end of the flow meter pipe, and the inner wall of the sealing plate is in contact with the nozzle head, the flow meter pipe and the sealing gasket.

[0016] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0017] This natural gas flow nozzle with good sealing effect connects the first and second fixed blocks through the rotation of the threaded rod, thus initially connecting the nozzle head to the flow meter pipeline. As the threaded rod moves downward, it drives the limiting frame to move downward and fits on the outside of the connecting block, thereby making the sealing plate fit tightly and sealing the connection between the nozzle head and the flow meter pipeline, enhancing the sealing effect, preventing leakage, and making installation and disassembly very convenient. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a top view of the present invention;

[0020] Figure 3 This utility model Figure 2 Cross-sectional view at point AA;

[0021] Figure 4 This utility model Figure 3 Enlarged view at point B in the middle;

[0022] Figure 5 This is a schematic diagram of the present invention with the first fixing block removed;

[0023] Figure 6 This utility model Figure 5 Enlarged view at point C;

[0024] Figure 7 This is a schematic diagram of the connecting block of this utility model.

[0025] In the diagram: 1. Nozzle head; 2. Flow meter pipe; 3. First retaining ring; 4. Second retaining ring; 5. First fixing block; 6. Second fixing block; 7. Sealing plate; 8. Connecting block; 9. Perforation; 10. Threaded rod; 11. Limiting frame; 12. Movable ring; 13. Connecting rod; 14. Movable groove; 15. Sealing gasket. Detailed Implementation

[0026] 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.

[0027] Please see Figure 1-7 This utility model provides a technical solution: a natural gas flow nozzle with good sealing effect, including a nozzle head 1, a flow meter pipe 2 arranged below the nozzle head 1, a first retaining ring 3 and a second retaining ring 4 respectively fixedly connected to the outer side of the nozzle head 1 and the flow meter pipe 2, a first fixing block 5 and a second fixing block 6 respectively fixedly connected to the outer side of the first retaining ring 3 and the second retaining ring 4, a sealing plate 7 movably connected to the lower surface of the first retaining ring 3, a connecting block 8 fixedly connected to the outer side of the sealing plate 7, a through hole 9 opened on the side of the connecting block 8, a threaded rod 10 movably connected inside the first fixing block 5, and the bottom end of the threaded rod 10 extending into the through hole 9, a limit frame 11 is provided on the outer side of the upper half of the threaded rod 10, a movable ring 12 is movably connected to the outer side of the upper half of the threaded rod 10, a connecting rod 13 is fixedly connected to the outer side of the movable ring 12, and the end of the connecting rod 13 away from the movable ring 12 is fixedly connected to the inner wall of the limit frame 11, and a movable groove 14 is also opened on the upper surface of the connecting block 8 and communicates with the through hole 9.

[0028] In this embodiment, through the above-described technical solution, the sealing plate 7 on the nozzle head 1 is fitted onto the outside of the flow meter pipe 2, so that the sealing plate 7 contacts the outside of the flow meter pipe 2. At this time, the threaded rod 10 on the first fixing block 5 is inserted into the through hole 9 of the connecting block 8. The threaded rod 10 is rotated to screw it into the second fixing block 6, so that the nozzle head 1 and the flow meter pipe 2 are initially connected and sealed together. During the downward movement of the threaded rod 10, the limiting frame 11 will move downward as well. Due to the movable design of the limiting frame 11, it can not rotate with the threaded rod 10, but only move downward and fit onto the outside of the connecting block 8. Through the design of the movable groove 14, the connecting rod 13 in the limiting frame 11 can slide freely in the movable groove 14. At the same time, the movable ring 12 can also move freely in the through hole 9 without being affected, so that the connecting block 8 is tightly fitted together, thereby making the sealing plate 7 tightly adhere to the contact surface of the nozzle head 1 and the flow meter pipe 2 for sealing. Double sealing is completed in one step, which not only enhances the sealing effect and prevents leakage, but also facilitates disassembly and maintenance.

[0029] Please see Figure 1 , 2 3. There are two of each of the first fixing block 5 and the second fixing block 6, which are respectively distributed on both sides of the first retaining ring 3 and the second retaining ring 4. The first fixing block 5 and the second fixing block 6 have the same shape.

[0030] Through the above technical solution, the design of multiple first fixing blocks 5 and second fixing blocks 6 in this embodiment can enhance the sealing effect between the nozzle head 1 and the flow pipe, and the force is uniform, resulting in a better sealing effect.

[0031] Please see Figure 1 , 3 4, 5, 6, There are two sealing plates 7 that are in contact with each other, and the connecting block 8 is located on the front and rear sides of the sealing plate 7 and is located between the first fixing block 5 and the second fixing block 6.

[0032] In this embodiment, through the above technical solution, the connecting blocks 8 on the front and rear sides of the present application come into contact with each other, thereby allowing the limiting frame 11 to fit tightly on the outside of the two connecting blocks 8, thus completing the limiting of the sealing plate 7.

[0033] Please see Figure 4 , 6 7. Connecting block 8 is an L-shaped metal block. The shape of the limiting frame 11 is adapted to the shape of connecting block 8. The side of connecting block 8 is designed to be inclined.

[0034] In this embodiment, through the above technical solution, the inclined design of the side of the connecting block 8 allows the limiting frame 11 to press the connecting block 8 when it moves downward, so that it gradually contacts the limiting frame 11 and finally achieves a tight fit.

[0035] Please see Figure 4 The thread on the threaded rod 10 is located in the lower half of the threaded rod 10, and the diameter of the through hole 9 is larger than the diameter of the threaded rod 10.

[0036] In this embodiment, through the above technical solution, the threaded rod 10 will not contact the connecting block 8 when it is inserted into the connecting block 8, and will not be affected when the threaded rod 10 is turned, so that it gradually moves downward and is finally screwed into the second fixing block 6 to complete the connection.

[0037] Please see Figure 3 , 4 The bottom end of the nozzle head 1 and the top end of the flow meter pipe 2 are both fixedly connected to and in contact with a sealing gasket 15. The inner wall of the sealing plate 7 is in contact with the nozzle head 1, the flow meter pipe 2 and the sealing gasket 15.

[0038] When installing this natural gas flow nozzle with good sealing effect, the sealing plate 7 on the nozzle head 1 is placed on the outside of the flow meter pipe 2, so that the sealing plate 7 contacts the outside of the flow meter pipe 2. At this time, the threaded rod 10 on the first fixing block 5 is inserted into the through hole 9 of the connecting block 8. The threaded rod 10 is rotated to screw it into the second fixing block 6 to initially connect the nozzle head 1 and the flow meter pipe 2, so that the nozzle head 1 and the port of the flow meter pipe 2 fit together to complete the initial seal. During the downward rotation and movement of the threaded rod 10, the limiting frame 11 will move downward with it. Due to the movable design of the limiting frame 11, it does not rotate with the threaded rod 10, but only moves downward and fits on the outside of the connecting block 8, so that the connecting block 8 fits tightly. In this way, the sealing plate 7 is tightly pressed against the contact surface of the nozzle head 1 and the flow meter pipe 2 to seal, enhance the sealing performance of the connection, and facilitate disassembly and maintenance.

[0039] 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.

[0040] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A natural gas flow nozzle with good sealing effect, comprising a nozzle head (1), characterized in that: A flow meter pipe (2) is provided below the nozzle head (1). A first retaining ring (3) and a second retaining ring (4) are fixedly connected to the outer sides of the nozzle head (1) and the flow meter pipe (2), respectively. A first fixing block (5) and a second fixing block (6) are fixedly connected to the outer sides of the first retaining ring (3) and the second retaining ring (4), respectively. A sealing plate (7) is movably connected to the lower surface of the first retaining ring (3). A connecting block (8) is fixedly connected to the outer side of the sealing plate (7). A through hole (9) is opened on the side of the connecting block (8). The first fixing block (5) 5) A threaded rod (10) is movably connected inside, and the bottom end of the threaded rod (10) extends into the through hole (9). A limit frame (11) is provided on the outer side of the upper half of the threaded rod (10). A movable ring (12) is movably connected to the outer side of the upper half of the threaded rod (10). A connecting rod (13) is fixedly connected to the outer side of the movable ring (12). The end of the connecting rod (13) away from the movable ring (12) is fixedly connected to the inner wall of the limit frame (11). The upper surface of the connecting block (8) is also provided with a movable groove (14) and communicates with the through hole (9).

2. The natural gas flow nozzle with good sealing effect according to claim 1, characterized in that: There are two of the first fixing block (5) and the second fixing block (6), which are respectively distributed on both sides of the first retaining ring (3) and the second retaining ring (4). The first fixing block (5) and the second fixing block (6) have the same shape.

3. The natural gas flow nozzle with good sealing effect according to claim 2, characterized in that: The number of sealing plates (7) is two and they are in contact with each other. The connecting block (8) is located on the front and rear sides of the sealing plate (7) and is located between the first fixing block (5) and the second fixing block (6).

4. A natural gas flow nozzle with good sealing effect according to claim 3, characterized in that: The connecting block (8) is an L-shaped metal block, and the shape of the limiting frame (11) is adapted to the shape of the connecting block (8). The side of the connecting block (8) is designed to be inclined.

5. A natural gas flow nozzle with good sealing effect according to claim 4, characterized in that: The thread on the threaded rod (10) is located in the lower half of the threaded rod (10), and the diameter of the through hole (9) is greater than the diameter of the threaded rod (10).

6. A natural gas flow nozzle with good sealing effect according to claim 5, characterized in that: The bottom end of the nozzle head (1) and the top end of the flow meter pipe (2) are both fixedly connected to and in contact with a sealing gasket (15). The inner wall of the sealing plate (7) is in contact with the nozzle head (1), the flow meter pipe (2) and the sealing gasket (15).

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