Plug-in thermal gas mass flow meter

Abstract

The utility model discloses a plug-in thermal gas mass flow meter, which relates to the technical field of flow meters and comprises a pipeline, a support component is arranged at the top of the pipeline, a flow meter is arranged above the support component, a metal probe rod and a limit seat are arranged at the bottom of the flow meter, and the support component comprises an arc-shaped mounting plate. A supporting seat is arranged in the middle of the arc-shaped mounting plate, a supporting sleeve rod is arranged in the middle of the supporting seat, an inserting groove is formed in the bottom of the supporting sleeve rod, and a rubber supporting ring is arranged at the top of the supporting sleeve rod. The metal feeler lever is stably supported through the supporting seat and the supporting sleeve rod, the metal feeler lever is inserted into the inserting groove in the middle of the supporting sleeve rod, supporting of the metal feeler lever is enhanced, the metal feeler lever is prevented from shaking in the using process, and the detection stability is prevented from being affected; and the friction force of the contact surface of the metal probe rod and the supporting sleeve rod is enhanced through the arranged rubber supporting ring, so that the supporting stability is further improved.

Description

Technical Field

[0001] This utility model relates to the field of flow meter technology, and in particular to an insertion-type thermal gas mass flow meter. Background Technology

[0002] Thermal gas flow meters are designed based on the principle of thermal diffusion. This instrument uses the constant temperature difference method to accurately measure gas. It has the advantages of small size, high degree of digitalization, convenient installation and accurate measurement, and is widely used. For flow measurement of large cross-section air ducts, insertion thermal gas mass flow meters are generally used. Due to the large size of the air duct, the metal probe of the thermal gas mass flow meter has a long insertion depth and can only be fixed on the sleeve on the outside of the air duct arm, forming a cantilever structure.

[0003] Therefore, under the influence of wind, the metal probe will sway and vibrate along the direction of wind flow. The sensor probe moves along the vibration arc at the measuring point inside the pipe. This will cause changes in the relative velocity between the sensor and the airflow, thus affecting the measurement accuracy of the sensor probe. At the same time, the vibration of the metal probe can easily loosen the mechanical seal structure at the installation position of the instrument and the duct wall, affecting the sealing effect. Therefore, it is necessary to provide an insertion-type thermal gas mass flow meter to solve the above problems. Utility Model Content

[0004] The main objective of this invention is to provide an insertion-type thermal gas mass flow meter that can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An insertion-type thermal gas mass flow meter includes a pipe, a support assembly is provided at the top of the pipe, a flow meter is provided above the support assembly, and a metal probe and a limiting seat are provided at the bottom of the flow meter.

[0007] The support assembly includes an arc-shaped mounting plate, a support seat is provided in the middle of the arc-shaped mounting plate, and a support sleeve is provided in the middle of the support seat. The bottom of the support sleeve is provided with a plug groove, and the top of the support sleeve is provided with a rubber support ring. The top of the support seat is provided with a limit groove, an arc-shaped limit slot and a sealing ring, and an L-shaped limit rail is provided inside the arc-shaped limit slot.

[0008] Preferably, the bottom of the arc-shaped mounting plate is in contact with the outer wall of the pipe, and the side of the arc-shaped mounting plate is connected with positioning bolts by threads. There are four positioning bolts, which are symmetrically distributed on both sides of the arc-shaped mounting plate. The end of the positioning bolt away from the arc-shaped mounting plate is connected to the pipe, and a support seat is installed in the middle of the arc-shaped mounting plate.

[0009] Preferably, the bottom end of the support base is connected to the inside of the pipe, a support sleeve rod is fixedly connected to the middle of the support base, and the bottom end of the support sleeve rod is connected to the bottom inner wall of the pipe. A plug groove is opened in the middle of the bottom of the support sleeve rod, and a through groove is opened on the side of the support sleeve rod. The through groove passes through the support sleeve rod, and the through groove and the plug groove are interconnected.

[0010] Preferably, the top end of the support sleeve is connected to the top end of the support base, and a rubber support ring is installed on the inner wall of the end of the support sleeve near the support base. The top end of the rubber support ring is a certain distance from the top end of the support sleeve, and the inner wall of the rubber support ring is tightly fitted to the outer wall of the metal probe.

[0011] Preferably, the top of the support base is provided with a limiting groove, and there are three limiting grooves, which are evenly distributed on the top of the support base. The side of the limiting groove is provided with an arc-shaped limiting slot, and the arc-shaped limiting slot penetrates the three limiting grooves. The arc-shaped limiting slot is L-shaped.

[0012] Preferably, an L-shaped limiting slide rail is slidably connected to the middle of the arc-shaped limiting groove, and the end of the L-shaped limiting slide rail away from the arc-shaped limiting groove is fixedly connected to the bottom inner wall of the limiting seat. The L-shaped limiting slide rail is correspondingly arranged with the limiting groove. A sealing ring is installed in the middle of the bottom of the limiting seat, and the sealing ring is inserted into the top of the support sleeve rod. The bottom of the sealing ring is in contact with the top of the rubber support ring, and the bottom of the limiting seat is in close contact with the top of the support seat.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. The metal probe is stably supported by the support base and support sleeve. The metal probe is inserted into the insertion groove in the middle of the support sleeve, which strengthens the support of the metal probe and prevents it from shaking during use, thus affecting the stability of the test. The rubber support ring further enhances the friction between the metal probe and the support sleeve, thereby improving the stability of the support.

[0015] 2. The L-shaped limiting slide rail is slidably connected inside the limiting slide groove and the arc-shaped limiting slot, thereby realizing the limiting connection between the limiting seat and the flow meter, which facilitates the disassembly and replacement of the flow meter and improves the ease of use of the device. In addition, the sealing ring is snapped into the top of the rubber support ring. The sealing ring and the rubber support ring work together to improve the sealing of the connection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0017] Figure 2This is a structural schematic diagram of the flow meter and support assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the support component of this utility model;

[0019] Figure 4 This is a schematic diagram of the bottom structure of the limiting seat of this utility model.

[0020] In the diagram: 1. Pipeline; 2. Flow meter; 3. Metal probe; 4. Limit seat; 5. Support assembly; 6. Arc-shaped mounting plate; 7. Positioning bolt; 8. Support base; 9. Support sleeve; 10. Insert groove; 11. Through groove; 12. Rubber support ring; 13. Sealing ring; 14. L-shaped limit slide rail; 15. Limit slide groove; 16. Arc-shaped limit slot. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, an insertion-type thermal gas mass flow meter includes a pipe 1, a support assembly 5 is provided at the top of the pipe 1, a flow meter 2 is provided above the support assembly 5, and a metal probe 3 and a limiting seat 4 are provided at the bottom of the flow meter 2.

[0023] The support assembly 5 includes an arc-shaped mounting plate 6, a support seat 8 in the middle of the arc-shaped mounting plate 6, and a support sleeve 9 in the middle of the support seat 8. The bottom of the support sleeve 9 has a insertion groove 10, and the top of the support sleeve 9 has a rubber support ring 12. The top of the support seat 8 has a limiting groove 15, an arc-shaped limiting slot 16, and a sealing ring 13. An L-shaped limiting rail 14 is provided inside the arc-shaped limiting slot 16. The bottom of the arc-shaped mounting plate 6 contacts the outer wall of the pipe 1. Four positioning bolts 7 are threadedly connected to the sides of the arc-shaped mounting plate 6, symmetrically distributed on both sides. The end of the positioning bolt 7 furthest from the arc-shaped mounting plate 6 is connected to the pipe 1. The support seat 8 is installed in the middle of the arc-shaped mounting plate 6, and its bottom end is connected to the inside of the pipe 1. The support sleeve 9 is fixedly connected to the middle of the support seat 8, and its bottom end is connected to the bottom of the pipe 1. On the inner wall, a insertion groove 10 is provided in the middle of the bottom of the support sleeve rod 9, and a through groove 11 is provided on the side of the support sleeve rod 9. The through groove 11 passes through the support sleeve rod 9 and is connected to the insertion groove 10. The top of the support sleeve rod 9 is connected to the top of the support base 8, and a rubber support ring 12 is installed on the inner wall of the end of the support sleeve rod 9 near the support base 8. The top of the rubber support ring 12 is a certain distance from the top of the support sleeve rod 9. The inner wall of the rubber support ring 12 is tightly fitted to the outer wall of the metal probe rod 3. The support base 8 and the support sleeve rod 9 provide stable support for the metal probe rod 3. The metal probe rod 3 is inserted into the insertion groove 10 in the middle of the support sleeve rod 9, which strengthens the support for the metal probe rod 3 and prevents the metal probe rod 3 from shaking during use, thus affecting the detection stability. The rubber support ring 12 strengthens the friction between the metal probe rod 3 and the support sleeve rod 9, further improving the stability of the support.

[0024] The top of the support base 8 has three limiting grooves 15, which are evenly distributed on the top of the support base 8. The sides of the limiting grooves 15 have arc-shaped limiting slots 16, which extend through all three limiting grooves 15. The arc-shaped limiting slots 16 are L-shaped, and an L-shaped limiting rail 14 is slidably connected to the middle of the arc-shaped limiting slot 16. The end of the L-shaped limiting rail 14 away from the arc-shaped limiting slot 16 is fixedly connected to the bottom inner wall of the limiting base 4. The L-shaped limiting rail 14 corresponds to the limiting grooves 15. A sealing ring 1 is installed in the middle of the bottom of the limiting base 4. 3. The sealing ring 13 is inserted into the top of the support sleeve rod 9, and the bottom of the sealing ring 13 contacts the top of the rubber support ring 12. The bottom of the limiting seat 4 is in close contact with the top of the support seat 8. The L-shaped limiting slide rail 14 is slidably connected to the inside of the limiting slide groove 15 and the arc-shaped limiting slot 16, thereby realizing the limiting connection between the limiting seat 4 and the flow meter 2, which facilitates the disassembly and replacement of the flow meter 2 and improves the ease of use of the device. The sealing ring 13 is snapped into the top of the rubber support ring 12. The sealing ring 13 and the rubber support ring 12 work together to improve the sealing of the connection.

[0025] It should be noted that this utility model is an insertion-type thermal gas mass flow meter. In use, the metal probe 3 is inserted into the top of the support sleeve 9, downwards, with the bottom end of the metal probe 3 contacting the insertion groove 10 at the bottom of the support sleeve 9. The support sleeve 9 improves the stability of the metal probe 3, and the through groove 11 passing through the support sleeve 9 strengthens the support while reducing the impact on detection, thus achieving a limiting connection for the metal probe 3. Furthermore, the rubber support ring 12 at the top of the support sleeve 9 contacts the metal probe 3, increasing friction at the connection between the support sleeve 9 and the metal probe 3. The friction is increased to improve the stability of the connection. At the same time, the L-shaped limiting slide rail 14 at the bottom of the limiting seat 4 is inserted into the inside of the limiting slide groove 15. By rotating the limiting seat 4, the L-shaped limiting slide rail 14 is slidably connected to the inside of the arc-shaped limiting slot 16, thereby realizing the limiting connection of the L-shaped limiting slide rail 14, improving the stability of the device and facilitating the disassembly of the flow meter 2 and the metal probe 3, thus improving the ease of use of the device. The sealing ring 13 at the bottom of the limiting seat 4 is inserted into the inside of the support sleeve rod 9, and the bottom of the sealing ring 13 contacts the top of the rubber support ring 12, further improving the sealing performance of the connection.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An insertion-type thermal gas mass flow meter, comprising a pipe (1), characterized in that: The top of the pipe (1) is provided with a support assembly (5), and a flow meter (2) is provided above the support assembly (5). A metal probe (3) and a limiting seat (4) are provided at the bottom of the flow meter (2). The support assembly (5) includes an arc-shaped mounting plate (6), a support seat (8) is provided in the middle of the arc-shaped mounting plate (6), and a support sleeve rod (9) is provided in the middle of the support seat (8). The bottom of the support sleeve rod (9) is provided with a plug groove (10), and the top of the support sleeve rod (9) is provided with a rubber support ring (12). The top of the support seat (8) is provided with a limit groove (15), an arc-shaped limit slot (16) and a sealing ring (13), and the interior of the arc-shaped limit slot (16) is provided with an L-shaped limit rail (14).

2. The insertion-type thermal gas mass flow meter according to claim 1, characterized in that: The bottom of the arc-shaped mounting plate (6) is in contact with the outer wall of the pipe (1). The side of the arc-shaped mounting plate (6) is connected by a positioning bolt (7) by a thread. There are four positioning bolts (7), which are symmetrically distributed on both sides of the arc-shaped mounting plate (6). The end of the positioning bolt (7) away from the arc-shaped mounting plate (6) is connected to the pipe (1). A support seat (8) is installed in the middle of the arc-shaped mounting plate (6).

3. The insertion-type thermal gas mass flow meter according to claim 2, characterized in that: The bottom end of the support base (8) is connected to the inside of the pipe (1). A support sleeve (9) is fixedly connected in the middle of the support base (8), and the bottom end of the support sleeve (9) is connected to the bottom inner wall of the pipe (1). A plug groove (10) is opened in the middle of the bottom of the support sleeve (9), and a through groove (11) is opened on the side of the support sleeve (9). The through groove (11) penetrates the support sleeve (9), and the through groove (11) and the plug groove (10) are interconnected.

4. The insertion-type thermal gas mass flow meter according to claim 3, characterized in that: The top end of the support sleeve (9) is connected to the top end of the support base (8), and a rubber support ring (12) is installed on the inner wall of the end of the support sleeve (9) near the support base (8). The top end of the rubber support ring (12) is a certain distance from the top end of the support sleeve (9), and the inner wall of the rubber support ring (12) is tightly fitted with the outer wall of the metal probe (3).

5. The insertion-type thermal gas mass flow meter according to claim 3, characterized in that: The top of the support base (8) is provided with a limiting groove (15), and there are three limiting grooves (15), which are evenly distributed on the top of the support base (8). The side of the limiting groove (15) is provided with an arc-shaped limiting slot (16), and the arc-shaped limiting slot (16) passes through the three limiting grooves (15). The arc-shaped limiting slot (16) is L-shaped.

6. The insertion-type thermal gas mass flow meter according to claim 5, characterized in that: The arc-shaped limiting groove (16) is slidably connected to an L-shaped limiting slide rail (14), and the end of the L-shaped limiting slide rail (14) away from the arc-shaped limiting groove (16) is fixedly connected to the bottom inner wall of the limiting seat (4). The L-shaped limiting slide rail (14) is correspondingly set with the limiting groove (15). A sealing ring (13) is installed in the middle of the bottom of the limiting seat (4), and the sealing ring (13) is inserted into the top of the support sleeve rod (9). The bottom of the sealing ring (13) is in contact with the top of the rubber support ring (12), and the bottom of the limiting seat (4) is in close contact with the top of the support seat (8).

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