Temperature and pressure compensation device of gas flowmeter

Abstract

The utility model provides a temperature and pressure compensation device of a gas flow meter. The temperature and pressure compensation device of the gas flow meter comprises a connecting pipe, a mounting pipe, a probe, a first sealing ring and a second sealing ring. According to the temperature and pressure compensation device of the gas flow meter, the first sealing ring is arranged between the installation pipe and the fixing plate, and first sealing is achieved. A second sealing ring is further installed in the installation pipe, the second sealing ring is extruded between a lower pressing table on the probe and a supporting table on the inner wall of the installation pipe, and when the fixing plate is fixed to the installation pipe, the second sealing ring is extruded between the lower pressing table and the supporting table. Therefore, a second seal between the probe and the mounting tube is formed. Through the arrangement of the first sealing ring and the second sealing ring, double sealing between the probe and the mounting pipe can be realized, and the sealing effect between the probe and the mounting pipe is effectively improved, so that the safety in the use process is improved.

Description

Technical Field

[0001] This utility model belongs to the field of gas flow meter technology, specifically relating to a gas flow meter temperature and pressure compensation device. Background Technology

[0002] When measuring gas flow rate, changes in gas pressure and temperature can affect the measurement results. Therefore, temperature and pressure compensation devices are commonly used to detect the internal temperature and pressure of the pipeline and dynamically compensate for the measurement results. These devices typically use a main pipeline with flanges at both ends, with a mounting pipe for installing the measuring probe in the middle. A flange is fixed to the outside of the measuring probe to the mounting pipe. The sealing method between the measuring probe and the mounting pipe usually involves adding a sealing ring between the flange and the mounting pipe, using a single-layer seal. However, during use, if the sealing ring fails, gas leakage can easily occur, resulting in gas waste. In the measurement of hazardous gases, gas leakage can also lead to danger. Utility Model Content

[0003] This utility model provides a gas flow meter temperature and pressure compensation device, which aims to solve the problem of unsatisfactory sealing effect of existing gas flow meter temperature and pressure compensation devices.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a gas flow meter temperature and pressure compensation device, comprising:

[0005] Connecting pipe;

[0006] The installation tube has one end connected to the middle of the connecting tube and is configured to communicate with the connecting tube;

[0007] A probe is inserted inside the mounting tube, and a fixing plate for fixing to the end of the mounting tube is sealed to the probe;

[0008] A first sealing ring is installed between the fixing plate and the mounting tube to achieve a seal between the fixing plate and the mounting tube;

[0009] The second sealing ring is fitted onto the outside of the probe, and the probe is provided with a pressing platform for pressing the second sealing ring. The inner wall of the mounting tube is provided with a support platform for supporting the second sealing ring.

[0010] In one possible implementation, the probe is further fitted with multiple compression rings on its outer side, and a second sealing ring is provided between each two adjacent compression rings.

[0011] In one possible implementation, the compression ring is slidably disposed inside the mounting tube.

[0012] In one possible implementation, the fixing plate has a guide portion protruding from the side near the mounting tube, and the inner wall of the mounting tube has a guide hole that slides with the guide portion.

[0013] In one possible implementation, a limiting rib protrudes from the inner wall of the middle part of the mounting tube, a limiting block protrudes from the outer side of the probe, and a clearance opening is provided on the limiting rib to allow the limiting block to move to the bottom of the limiting rib.

[0014] In one possible implementation, the bottom surface of the limiting rib is a spiral structure centered on the axis of the mounting tube.

[0015] In one possible implementation, the number of limiting blocks is multiple, and the multiple limiting blocks are arranged at uniform intervals along the circumference of the probe.

[0016] In one possible implementation, the end of the mounting tube is recessed with an annular groove for mounting the first sealing ring, and when the first sealing ring is installed inside the annular groove, the first sealing ring protrudes from the end face of the mounting tube.

[0017] The solution shown in this application, compared with the prior art, incorporates a connecting pipe with flanges at both ends for connection to a conveying pipeline. An installation pipe is installed in the middle of the connecting pipe, with its axis perpendicular to the axis of the connecting pipe and penetrating the side wall of the connecting pipe. A probe is detachably mounted on the installation pipe, and a fixing plate is fixedly mounted on the outside of the probe, with the fixing plate and probe connected by a welded seal. Fasteners are threaded to the end of the installation pipe to secure the fixing plate to it. This application achieves a first seal by providing a first sealing ring between the installation pipe and the fixing plate. A second sealing ring is also installed inside the installation pipe, and is pressed between the lower pressure platform and the support platform, achieving a second seal. The combination of the first and second sealing rings achieves a double seal between the probe and the installation pipe, effectively improving the sealing effect and thus enhancing safety during use. Attached Figure Description

[0018] Figure 1 A schematic diagram of the gas flow meter temperature and pressure compensation device provided in this embodiment of the utility model;

[0019] Figure 2 A schematic diagram of the mounting structure of the probe and mounting tube provided in an embodiment of this utility model;

[0020] Figure 3 A schematic diagram of the internal limiting ribs of the mounting sleeve provided in this embodiment of the utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Connecting pipe; 2. Mounting pipe; 21. Support platform; 22. Limiting rib; 3. Probe; 31. Fixing plate; 311. Guide part; 32. Lower pressing platform; 33. Limiting block; 4. First sealing ring; 5. Second sealing ring; 6. Extrusion ring. Detailed Implementation

[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0024] Please refer to the following: Figures 1 to 3 The gas flow meter temperature and pressure compensation device provided by this utility model will now be described. The gas flow meter temperature and pressure compensation device includes a connecting pipe 1, a mounting pipe 2, a probe 3, a first sealing ring 4, and a second sealing ring 5. One end of the mounting pipe 2 is connected to the middle of the connecting pipe 1 and is configured to communicate with the connecting pipe 1; the probe 3 is inserted into the mounting pipe 2, and a fixing plate 31 for fixing to the end of the mounting pipe 2 is sealed and connected to the probe 3; the first sealing ring 4 is installed between the fixing plate 31 and the mounting pipe 2 to achieve a seal between the fixing plate 31 and the mounting pipe 2; the second sealing ring 5 is fitted on the outside of the probe 3, and a lower pressing platform 32 for pressing the second sealing ring 5 is provided on the probe 3; a support platform 21 for supporting the second sealing ring 5 is provided on the inner wall of the mounting pipe 2.

[0025] The gas flow meter temperature and pressure compensation device provided in this embodiment, compared with the prior art, features a connecting pipe 1 with flanges at both ends for connecting to a delivery pipeline. An installation pipe 2 is installed in the middle of the connecting pipe 1, with its axis perpendicular to the axis of the connecting pipe 1 and penetrating the side wall of the connecting pipe 1. A probe 3 is detachably installed on the installation pipe 2, and a fixing plate 31 is fixedly installed on the outside of the probe 3, with the fixing plate 31 and probe 3 connected by welding. Fasteners for fixing the fixing plate 31 to the installation pipe 2 are threaded at the end of the installation pipe 2. In this application, a first sealing ring 4 is provided between the installation pipe 2 and the fixing plate 31 to achieve a first seal. A second sealing ring 5 is also installed inside the installation pipe 2, and the second sealing ring 5 is pressed between the lower pressure platform 32 and the support platform 21 to achieve a second seal. By setting the first sealing ring 4 and the second sealing ring 5, a double seal can be achieved between the probe 3 and the mounting tube 2, which effectively improves the sealing effect between the probe 3 and the mounting tube 2, thereby improving the safety during use.

[0026] Specifically, in this embodiment, the second sealing ring 5 abuts against the inner wall of the mounting tube 2. When the pressing platform 32 squeezes the second sealing ring 5 onto the support platform 21, the second sealing ring 5 deforms and abuts against the outer wall of the probe 3, thereby improving the stability of the seal.

[0027] Specifically, in this embodiment, a detection probe for detecting the internal temperature and pressure of the connecting pipe 1 is installed at the bottom end of the probe 3, and a display screen for displaying the detection data is installed at the other end of the probe 3. The compensation system adopts existing technology and will not be described further here.

[0028] In some embodiments, the probe 3 described above can be as follows: Figure 2 The structure shown. See also Figure 2 The probe 3 is also fitted with multiple compression rings 6 on its outer side, and a second sealing ring 5 is provided between each two adjacent compression rings 6. Both the compression rings 6 and the second sealing rings 5 ​​are located inside the mounting tube 2. There are multiple second sealing rings 5 ​​and multiple compression rings 6, which are arranged alternately to achieve a multi-seal effect through the multiple second sealing rings 5.

[0029] Specifically, in this embodiment, when installing the probe 3 into the mounting tube 2, the compression ring 6 and the second sealing ring 5 are first placed into the mounting tube 2 in sequence. Then, the probe 3 is placed into the mounting tube 2, and the lower pressure plate 32 on the probe 3 presses against the uppermost compression ring 6 or the second sealing ring 5. When the fixing plate 31 is fixed to the end of the mounting tube 2, the probe 3 moves downward, and the lower pressure plate 32 and multiple compression rings 6 can compress and deform multiple second sealing rings 5 ​​to achieve a sealing effect.

[0030] In some embodiments, the compression ring 6 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 The compression ring 6 is slidably disposed inside the mounting tube 2. The outer wall of the compression ring 6 slides within the inner hole of the mounting tube 2, and the inner hole of the compression ring 6 slides within the probe 3. This allows the compression ring 6 to be positioned, and the position of the probe 3 can be determined by the compression ring 6, ensuring the stability of the probe 3's position. When installing the compression ring 6, it can be directly placed inside the mounting tube 2 and rests on the support platform 21. The sliding engagement between the compression ring 6 and the inner wall of the mounting tube 2 guides the position of the compression ring 6.

[0031] In some embodiments, the fixing plate 31 may be adopted as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3The fixing plate 31 has a guide portion 311 protruding from the side near the mounting tube 2, and the inner wall of the mounting tube 2 has a guide hole that slides with the guide portion 311. The fixing plate 31 has a disc-shaped structure, and the probe 3 is installed at the center of the fixing plate 31. When the fixing plate 31 is installed on the mounting tube 2, the guide portion 311 on the fixing plate 31 first slides into the guide hole. This guides the relative position of the fixing plate 31 and the mounting tube 2, facilitating the positioning of the probe 3. This also facilitates the positioning and connection between the probe 3 and the mounting tube 2, while ensuring the stability of the fixing plate 31 when installed on the mounting tube 2.

[0032] In some embodiments, the mounting tube 2 may be adopted as follows: Figure 2 , Figure 3 The structure shown. See also... Figure 2 , Figure 3 A limiting rib 22 protrudes from the inner wall of the middle section of the mounting tube 2, and a limiting block 33 protrudes from the outer side of the probe 3. The limiting rib 22 has a clearance opening to allow the limiting block 33 to move below it. The limiting rib 22 is arranged circumferentially on the inner wall of the mounting tube 2. A limiting block 33 is also fixedly installed on the outer side of the probe 3, and can move below the limiting rib 22. When installing the probe 3 into the mounting tube 2, by aligning the limiting block 33 on the outer side of the probe 3 with the clearance opening on the limiting rib 22, the probe 3 is pushed downwards, causing the limiting block 33 on the probe 3 to move below the limiting rib 22. By rotating the probe 3, the limiting block 33 is then positioned below the limiting rib 22. The probe 3 is positioned inside the mounting tube 2 to prevent it from sliding out. Finally, by tightening the fixing plate 31 to the end of the mounting tube 2, the probe 3 can be further pushed downward to compress and deform the first sealing ring 4 and the second sealing ring 5, thereby achieving a stable sealing effect.

[0033] Specifically, in this embodiment, when the limiting block 33 moves below the limiting rib 22, the fixing plate 31 abuts against the first sealing ring 4, and the lower pressure plate 32 on the probe 3 abuts against the second sealing ring 5 or the compression ring 6. This achieves a slight pressure on the first sealing ring 4 and the second sealing ring 5, resulting in a certain sealing effect. Therefore, even if the bolts on the mounting tube 2 used to fix the fixing plate 31 loosen, the limiting block 33 and the limiting rib 22 can still maintain the sealing effect through the first sealing ring 4 and the second sealing ring 5, ensuring stability and safety during use.

[0034] In some embodiments, the aforementioned limiting rib 22 can be adopted as follows: Figure 3 The structure shown. See also Figure 3The bottom surface of the limiting rib 22 is a spiral structure centered on the axis of the mounting tube 2. There are two limiting ribs 22, which are arranged opposite each other and have the same spiral direction. The limiting block 33 on the probe 3 can first move to the bottom surface of the top of the limiting rib 22, and then rotate the probe 3 so that the limiting block 33 on the probe 3 can move downward through the guide of the limiting rib 22, thereby achieving a tight seal on the first sealing ring 4 and the second sealing ring 5.

[0035] Specifically, in this embodiment, the probe 3 is first inserted into the mounting tube 2. Then, the limiting block 33 on the probe 3 is moved to the bottom of the limiting rib 22, and the probe 3 is rotated so that the through hole on the fixing plate 31 is aligned with the threaded hole at the end of the mounting tube 2. During the alignment process, the limiting block 33 on the probe 3 moves downward with the guide of the bottom surface of the limiting rib 22. At the same time, when the fixing plate 31 is fixed to the mounting tube 2 with fasteners, the position of the fixing plate 31 can be limited by the fasteners to prevent the probe 3 from moving outward from the mounting tube 2 due to the rebound force of the first sealing ring 4 and the second sealing ring 5.

[0036] In some embodiments, the aforementioned limiting block 33 may employ, as follows: Figure 3 The structure shown. See also Figure 3 The probe 3 has multiple limiting blocks 33, which are evenly spaced along its circumference. These limiting blocks 33 are evenly distributed on the outer side of the probe 3, ensuring uniform force distribution around the probe 3 and guaranteeing effective compression of the first sealing ring 4 and the second sealing ring 5. This ensures the stability of the sealing effect.

[0037] Specifically, in this embodiment, limiting ribs 22 corresponding to the number of limiting blocks 33 are arranged on the inner wall of the mounting tube 2, so that each limiting block 33 can be squeezed by the limiting ribs 22 to ensure that the force around the probe 3 is uniform.

[0038] In some embodiments, the mounting tube 2 may be adopted as follows: Figure 2 The structure shown. See also Figure 2 An annular groove is recessed at the end of the mounting tube 2, and a first sealing ring 4 is placed inside the annular groove. The annular groove is located on the inner wall of the mounting tube 2. When the first sealing ring 4 is placed inside the annular groove, the top of the first sealing ring 4 protrudes from the top surface of the annular groove, and the inner ring of the first sealing ring 4 protrudes from the inner wall of the annular groove. When the probe 3 is installed inside the mounting tube 2, the inner ring of the first sealing ring 4 abuts against the outer wall of the probe 3. The fixing plate 31 is pressed against the top surface of the first sealing ring 4, thereby achieving bidirectional sealing of the probe 3 through the first sealing ring 4 to improve the overall sealing effect.

[0039] Specifically, in this embodiment, in the free state, the outer wall of the first sealing ring 4 abuts against the inner wall of the annular groove. During the installation of the probe 3, when the fixing plate 31 has not yet squeezed the first sealing ring 4, there is a gap between the probe 3 and the first sealing ring 4. When the fixing plate 31 squeezes the first sealing ring 4, the first sealing ring 4 will deform, so that the inner ring of the first sealing ring 4 abuts against the outer side of the probe 3, thereby achieving a seal between the probe 3 and the inner wall of the mounting tube 2.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A gas flow meter temperature and pressure compensation device, characterized in that, include: Connecting pipe (1); The mounting tube (2) is connected at one end to the middle of the connecting tube (1) and communicates with the connecting tube (1); The probe (3) is inserted inside the mounting tube (2), and a fixing plate (31) for fixing to the end of the mounting tube (2) is sealed on the probe (3); The first sealing ring (4) is installed between the fixing plate (31) and the mounting tube (2) to achieve a seal between the fixing plate (31) and the mounting tube (2); The second sealing ring (5) is fitted on the outside of the probe (3). The probe (3) is provided with a pressing platform (32) for pressing the second sealing ring (5). The inner wall of the mounting tube (2) is provided with a support platform (21) for supporting the second sealing ring (5).

2. The gas flow meter temperature and pressure compensation device as described in claim 1, characterized in that, The probe (3) is also fitted with a plurality of compression rings (6) on its outer side, and a second sealing ring (5) is provided between each two adjacent compression rings (6).

3. The gas flow meter temperature and pressure compensation device as described in claim 2, characterized in that, The compression ring (6) is slidably disposed inside the mounting tube (2).

4. The gas flow meter temperature and pressure compensation device as described in claim 1, characterized in that, The fixing plate (31) has a guide part (311) protruding from the side near the mounting tube (2), and the inner wall of the mounting tube (2) has a guide hole that slides with the guide part (311).

5. The gas flow meter temperature and pressure compensation device as described in claim 1, characterized in that, A limiting rib (22) protrudes from the inner wall of the middle part of the mounting tube (2), and a limiting block (33) protrudes from the outer side of the probe (3). The limiting rib (22) is provided with a clearance opening for avoiding the limiting block (33) from moving to the bottom of the limiting rib (22).

6. The gas flow meter temperature and pressure compensation device as described in claim 5, characterized in that, The bottom surface of the limiting rib (22) is a spiral structure centered on the axis of the mounting tube (2).

7. The gas flow meter temperature and pressure compensation device as described in claim 5, characterized in that, The number of the limiting blocks (33) is multiple, and the multiple limiting blocks (33) are evenly spaced along the circumference of the probe (3).

8. The gas flow meter temperature and pressure compensation device as described in claim 1, characterized in that, The end of the mounting tube (2) is recessed with an annular groove for installing the first sealing ring (4). When the first sealing ring (4) is installed inside the annular groove, the first sealing ring (4) protrudes from the end face of the mounting tube (2).

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