Thermal type gas mass flow meter

Abstract

The invention is suitable for the related technical field of gas flow meters, and provides a thermal gas mass flow meter which comprises a flow meter body, a first pipeline and a second pipeline are provided with sealing assemblies in a matched mode, each sealing assembly comprises a first sealing body arranged on the first pipeline in a sleeving mode, and the second pipeline is provided with a second sealing body in a sleeving mode. A first sealing unit is arranged on the first sealing main body, through the arrangement of the first sealing unit, under the cooperation of an annular clamping protrusion and an annular clamping groove, the position of the first sealing main body on the first pipeline is adjusted, and a moving plate and an adjusting plate are connected through the cooperation of an inserting plate and an inserting hole; at the moment, the arc-shaped sealing plates correspond to the flange body in position, then the first rotary knob is rotated, the first threaded rod is driven to move in the axial direction of the first rotary knob, the arc-shaped sealing plates are driven to move close to the flange body, the side face of the flange body can be sealed in all directions through the arrangement of the multiple arc-shaped sealing plates, and the overall air tightness is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field related to gas flow meters, and in particular relates to a thermal gas mass flow meter. Background Art

[0002] A gas mass flow meter is a device used to measure gas flow. It determines the mass flow rate of the gas by sensing the impact of gas flow on the sensor. These flow meters usually use the principles of thermal scattering or thermal conductivity for measurement.

[0003] The Chinese utility model patent with patent publication number CN221198543U has a fixing ring on the outer wall of the flow meter. After confirming the inner diameter of the pipeline, the position of the fixing ring is adjusted so that the sensing probe of the flow meter is located above the axis of the inner diameter of the pipeline, and then the top screw is rotated, and the top screw moves inward, which pushes the sealing ring to fix the position of the fixing ring. Subsequently, during installation, the adjusting rod in the adjusting hole is rotated by a tool, which pushes the telescopic plates to move toward each other and against the top surface of the fixing ring to achieve preliminary limiting. Subsequently, the lifting bolt in the lifting hole is rotated to squeeze the fixing ring downward to place it in a suitable measuring position. However, when the above device is actually used, there are some shortcomings. The connection between the flow meter of the above device and the external pipeline may leak after long-term use. Based on this, a thermal gas mass flow meter that can solve the above problems is now proposed. Summary of the invention

[0004] The invention provides a thermal gas mass flowmeter, aiming to solve the problem that the connection between the flowmeter and the external pipeline of the existing device may leak after long-term use.

[0005] The present invention is implemented as follows: a thermal gas mass flowmeter includes a flowmeter body, the flowmeter body is connected to a first pipe, the first pipe is connected to a second pipe in the outside world through a flange body, the first pipe and the second pipe are cooperatively provided with a sealing assembly, the sealing assembly includes a first sealing body sleeved on the first pipe, a second sealing body sleeved on the second pipe, and a first sealing unit is provided on the first sealing body.

[0006] Preferably, the first sealing unit includes a plurality of first connecting blocks distributed in a circumferential array and fixedly connected to the first sealing body, a first threaded rod being threadedly connected to the first connecting block, a first knob being fixedly connected to one end of the first threaded rod, two clamping plates being fixedly connected to the other end of the first threaded rod, an adjusting plate being arranged between the two clamping plates, a first guide rod passing through the adjusting plate being fixedly connected to the lower end of the first connecting block, a symmetrically arranged second connecting block being fixedly connected to the lower end of the adjusting plate, a plug hole being provided on the second connecting block, a plug plate being inserted into the plug hole, and two The plug plate is connected to the movable plate, and the movable plate is connected to the arc-shaped sealing plate through an elastic unit; the rotating knob is rotated, and the position of the first sealing body on the first pipe is adjusted under the cooperation of the annular clamping protrusion and the annular clamping groove. The movable plate is connected to the adjustment plate through the cooperation of the plug plate and the socket. At this time, the position of the arc-shaped sealing plate corresponds to that of the flange body. The first knob is rotated again to drive the first threaded rod to move in its axial direction, and the arc-shaped sealing plate is driven to move close to the position of the flange body. Through the arrangement of multiple arc-shaped sealing plates, the side of the flange body can be fully sealed to ensure the overall air tightness.

[0007] Preferably, the elastic unit includes a through groove opened on the movable plate, a symmetrically arranged second guide rod is fixedly connected in the through groove, a movable block is arranged in the through groove, the movable block is connected to the arc-shaped sealing plate, first connecting plates are fixedly connected on both sides of the movable block, the second guide rod passes through the first connecting plate, the first connecting plate is connected to the inner wall of the through groove by a spring for providing elastic force, and the spring is sleeved on the outer side of the second guide rod; under the action of the spring, the first connecting plate moves in the direction of the second guide rod, driving the movable block to move in the direction of the second guide rod, close to the position of the flange main body, and can drive the arc-shaped sealing plate to make preliminary contact with the flange main body for subsequent processing.

[0008] Preferably, the arc-shaped sealing plate is provided with an arc-shaped contact surface.

[0009] Preferably, a rotating knob is threadedly connected to the first pipe, an annular clamping protrusion is fixedly connected to the side surface of the first sealing body, and an annular clamping groove cooperating with the annular clamping protrusion is formed on the rotating knob.

[0010] Preferably, a first magnetic ring is fixedly connected to the first sealing body, a second magnetic ring is fixedly connected to the second sealing body, the first magnetic ring and the second magnetic ring are magnetically connected, a first sealing ring is fixedly connected to the first sealing body, and a sealing groove cooperating with the first sealing ring is provided on the second sealing body.

[0011] Preferably, a second connecting plate is fixedly connected to the first connecting block, a third connecting plate is fixedly connected to the second sealing body, a sealing box is fixedly connected to the third connecting plate, and the sealing box is magnetically connected to the second connecting plate.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0013] 1. Through the setting of the first sealing unit, the rotating knob is rotated, and the position of the first sealing body on the first pipe is adjusted under the cooperation of the annular clamping protrusion and the annular clamping groove. The movable plate and the adjusting plate have been connected through the cooperation of the plug plate and the plug hole. At this time, the position of the arc-shaped sealing plate corresponds to that of the flange body. Then the first knob is rotated to drive the first threaded rod to move in its axial direction, and the arc-shaped sealing plate is driven to move close to the position of the flange body. Through the setting of multiple arc-shaped sealing plates, the side of the flange body can be fully sealed to ensure the overall air tightness;

[0014] 2. Through the setting of the elastic unit, under the action of the spring, the first connecting plate moves in the direction of the second guide rod, driving the moving block to move in the direction of the second guide rod, close to the position of the flange body, and can drive the arc-shaped sealing plate to make initial contact with the flange body for subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The structure of a thermal gas mass flow meter provided by the present invention is shown in FIG. Figure 1 ;

[0016] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure at A in the middle;

[0017] Figure 3 yes Figure 1 A schematic diagram of the enlarged structure at B in the middle;

[0018] Figure 4 The structure of a thermal gas mass flow meter provided by the present invention is shown in FIG. Figure 2 ;

[0019] Figure 5 yes Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0020] Figure 6 The structure of a thermal gas mass flow meter provided by the present invention is shown in FIG. Figure 3 ;

[0021] Figure 7 The invention is a schematic structural diagram of the clamping connection between an annular clamping protrusion and an annular clamping groove in a thermal gas mass flow meter provided by the present invention.

[0022] Notes on figure numbers: 1. flow meter body; 2. first pipeline; 3. flange body; 4. second pipeline; 5. first sealing body; 6. second sealing body; 7. first connecting block; 8. first threaded rod; 9. first knob; 10. snap-in plate; 11. adjusting plate; 12. first guide rod; 13. second connecting block; 14. plug hole; 15. plug plate; 16. moving plate; 17. arcuate sealing plate; 18. through groove; 19. second guide rod; 20. moving block; 21. first connecting plate; 22. spring; 23. arcuate contact surface; 24. rotating knob; 25. annular snap-in protrusion; 26. annular snap-in groove; 27. first magnetic ring; 28. second magnetic ring; 29. ​​first sealing ring; 30. sealing groove; 31. second connecting plate; 32. third connecting plate; 33. sealing box. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] Example 1

[0026] The embodiment of the present invention provides a thermal gas mass flow meter, such as Figure 1-Figure 7 As shown, it includes a flow meter body 1, which is connected to a first pipe 2, and the first pipe 2 is connected to an external second pipe 4 through a flange body 3. The first pipe 2 and the second pipe 4 are matched with sealing components, and the sealing component includes a first sealing body 5 sleeved on the first pipe 2, a second sealing body 6 sleeved on the second pipe 4, and a first sealing unit is provided on the first sealing body 5.

[0027] When the above device is actually used, under the cooperation of the first sealing body 5 and the second sealing body 6, through the setting of the first sealing unit, the first sealing body 5 and the second sealing body 6 seal the connection between the flange body 3 to enhance the overall airtightness.

[0028] Example 2

[0029] join Figure 5 and Figure 6 In this embodiment, on the basis of embodiment 1, the first sealing unit includes a plurality of first connecting blocks 7 distributed in a circumferential array and fixedly connected to the first sealing body 5, a first threaded rod 8 is threadedly connected to the first connecting block 7, one end of the first threaded rod 8 is fixedly connected to a first knob 9, the other end of the first threaded rod 8 is fixedly connected to two clamping plates 10, an adjusting plate 11 is arranged between the two clamping plates 10, a first guide rod 12 passing through the adjusting plate 11 is fixedly connected to the lower end of the first connecting block 7, a symmetrically arranged second connecting block 13 is fixedly connected to the lower end of the adjusting plate 11, a plug hole 14 is opened on the second connecting block 13, a plug plate 15 is inserted in the plug hole 14, the two plug plates 15 are connected to a movable plate 16, and the movable plate 16 is connected to an arc-shaped sealing plate 17 through an elastic unit.

[0030] The arc-shaped sealing plate 17 is provided with an arc-shaped contact surface 23 .

[0031] A rotating knob 24 is threadedly connected to the first pipe 2 , an annular clamping protrusion 25 is fixedly connected to the side of the first sealing body 5 , and an annular clamping groove 26 cooperating with the annular clamping protrusion 25 is formed on the rotating knob 24 .

[0032] When the above-mentioned first sealing unit is actually used, the rotating knob 24 is rotated, and the position of the first sealing body 5 on the first pipe 2 is adjusted with the cooperation of the annular clamping protrusion 25 and the annular clamping groove 26. The movable plate 16 is connected to the adjustment plate 11 through the cooperation of the plug plate 15 and the plug hole 14. At this time, the arc-shaped sealing plate 17 corresponds to the position of the flange body 3. Then, the first knob 9 is rotated to drive the first threaded rod 8 to move in its axial direction, and drive the arc-shaped sealing plate 17 to move close to the flange body 3. Through the arrangement of multiple arc-shaped sealing plates 17, the side of the flange body 3 can be fully sealed to ensure the overall airtightness.

[0033] Example 3

[0034] join Figure 5In this embodiment, based on the second embodiment, the elastic force unit includes a through groove 18 provided on the movable plate 16, a symmetrically arranged second guide rod 19 is fixedly connected in the through groove 18, a movable block 20 is arranged in the through groove 18, the movable block 20 is connected to the arc-shaped sealing plate 17, and first connecting plates 21 are fixedly connected on both sides of the movable block 20, the second guide rod 19 passes through the first connecting plate 21, and the first connecting plate 21 is connected to the inner wall of the through groove 18 through a spring 22 for providing elastic force, and the spring 22 is sleeved on the outer side of the second guide rod 19.

[0035] When the above-mentioned elastic unit is actually used, under the action of the spring 22, the first connecting plate 21 moves in the direction of the second guide rod 19, driving the moving block 20 to move in the direction of the second guide rod 19, close to the position of the flange body 3, and can drive the arc-shaped sealing plate 17 to make initial contact with the flange body 3 for subsequent processing.

[0036] Example 4

[0037] join Figure 2 , Figure 3 and Figure 7 In this embodiment, based on the embodiment 3, a first magnetic ring 27 is fixedly connected to the first sealing body 5, a second magnetic ring 28 is fixedly connected to the second sealing body 6, the first magnetic ring 27 and the second magnetic ring 28 are magnetically connected, a first sealing ring 29 is fixedly connected to the first sealing body 5, and a sealing groove 30 cooperating with the first sealing ring 29 is opened on the second sealing body 6.

[0038] The first connection block 7 is fixedly connected with a second connection plate 31 , the second sealing body 6 is fixedly connected with a third connection plate 32 , the third connection plate 32 is fixedly connected with a sealing box 33 , and the sealing box 33 is magnetically connected to the second connection plate 31 .

[0039] The setting of the first magnetic ring 27 and the second magnetic ring 28 can ensure that the first sealing ring 29 is inserted into the sealing groove 30, and ensure that the first sealing body 5 and the second sealing body 6 can maintain a stable connection. The setting of the sealing box 33 can seal and protect the position of the first knob 9, and ensure that the first knob 9 will not rotate randomly.

[0040] In summary, the working principle of the present invention is as follows: under the cooperation of the first sealing body 5 and the second sealing body 6, through the setting of the first sealing unit, the first sealing body 5 and the second sealing body 6 seal the connection between the flange body 3 to enhance the overall air tightness; the rotating knob 24 is rotated, and the position of the first sealing body 5 on the first pipe 2 is adjusted under the cooperation of the annular clamping protrusion 25 and the annular clamping groove 26. The movable plate 16 is connected to the adjustment plate 11 through the cooperation of the plug plate 15 and the plug hole 14. At this time, the arc-shaped sealing plate 17 corresponds to the position of the flange body 3. Then, the first knob 9 is rotated to drive the first threaded rod 8 to move in its axial direction, and the arc-shaped sealing plate 17 is driven to move close to the flange body 3. Through multiple The setting of the arc-shaped sealing plate 17 can perform all-round sealing on the side of the flange body 3 to ensure the overall airtightness; under the action of the spring 22, the first connecting plate 21 moves in the direction of the second guide rod 19, driving the moving block 20 to move in the direction of the second guide rod 19, close to the position of the flange body 3, and can drive the arc-shaped sealing plate 17 to make preliminary contact with the flange body 3 for subsequent processing; the setting of the first magnetic ring 27 and the second magnetic ring 28 can ensure that the first sealing ring 29 is inserted into the sealing groove 30, ensuring that the first sealing body 5 and the second sealing body 6 can maintain a stable connection, and the setting of the sealing box 33 can seal and protect the position of the first knob 9 to ensure that the first knob 9 will not rotate randomly.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal gas mass flowmeter, comprising a flowmeter body (1), characterized in that: The flow meter body (1) is connected to a first pipe (2), and the first pipe (2) is connected to an external second pipe (4) through a flange body (3). The first pipe (2) and the second pipe (4) are provided with a sealing assembly, and the sealing assembly comprises a first sealing body (5) sleeved on the first pipe (2), a second sealing body (6) sleeved on the second pipe (4), and a first sealing unit is provided on the first sealing body (5).

2. A thermal gas mass flow meter as claimed in claim 1, characterized in that: The first sealing unit comprises a plurality of first connecting blocks (7) fixedly connected to the first sealing body (5) and distributed in a circumferential array, a first threaded rod (8) being threadedly connected to the first connecting block (7), one end of the first threaded rod (8) being fixedly connected to a first knob (9), the other end of the first threaded rod (8) being fixedly connected to two clamping plates (10), an adjustment plate (11) being arranged between the two clamping plates (10), a first guide rod (12) passing through the adjustment plate (11) being fixedly connected to the lower end of the first connecting block (7), and a symmetrically arranged second connecting block (13) being fixedly connected to the lower end of the adjustment plate (11).

3. A thermal gas mass flow meter as claimed in claim 2, characterized in that: The second connection block (13) is provided with a plug hole (14), a plug board (15) is inserted into the plug hole (14), and two plug boards (15) are connected to a movable plate (16).

4. A thermal gas mass flow meter as claimed in claim 2, characterized in that: The movable plate (16) is connected to the arc-shaped sealing plate (17) via an elastic unit.

5. A thermal gas mass flow meter as claimed in claim 4, characterized in that: The elastic unit comprises a through groove (18) provided on the movable plate (16), a symmetrically arranged second guide rod (19) being fixedly connected in the through groove (18), a movable block (20) being arranged in the through groove (18), the movable block (20) being connected to the arc-shaped sealing plate (17), first connecting plates (21) being fixedly connected on both sides of the movable block (20), the second guide rod (19) passing through the first connecting plate (21), the first connecting plate (21) being connected to the inner wall of the through groove (18) via a spring (22) for providing elastic force, and the spring (22) being sleeved on the outer side of the second guide rod (19).

6. A thermal gas mass flow meter as claimed in claim 2, characterized in that: The arc-shaped sealing plate (17) is provided with an arc-shaped contact surface (23).

7. A thermal gas mass flow meter as claimed in claim 4, characterized in that: A rotating knob (24) is threadedly connected to the first pipe (2), an annular clamping protrusion (25) is fixedly connected to the side surface of the first sealing body (5), and an annular clamping groove (26) matching with the annular clamping protrusion (25) is formed on the rotating knob (24).

8. A thermal gas mass flow meter as claimed in claim 1, characterized in that: A first magnetic ring (27) is fixedly connected to the first sealing body (5), and a second magnetic ring (28) is fixedly connected to the second sealing body (6); the first magnetic ring (27) and the second magnetic ring (28) are magnetically connected.

9. A thermal gas mass flow meter as claimed in claim 1, characterized in that: A first sealing ring (29) is fixedly connected to the first sealing body (5), and a sealing groove (30) cooperating with the first sealing ring (29) is provided on the second sealing body (6).

10. A thermal gas mass flow meter as claimed in claim 2, characterized in that: A second connecting plate (31) is fixedly connected to the first connecting block (7), a third connecting plate (32) is fixedly connected to the second sealing body (6), a sealing box body (33) is fixedly connected to the third connecting plate (32), and the sealing box body (33) is magnetically connected to the second connecting plate (31).

Images