Orifice plate flowmeter

Abstract

The utility model belongs to the technical field of flow meters, and provides an orifice plate flow meter which comprises a first pipeline, a second pipeline, a connecting seat, an orifice plate, a sealing ring and a driving mechanism. The first pipeline and the second pipeline are oppositely arranged, the lower end of the first pipeline and the lower end of the second pipeline are fixedly connected together through the connecting seat, and the pore plate is arranged between the first pipeline and the second pipeline; one end of the sealing ring is arranged on the first pipeline in a sleeving mode, the sealing ring and the first pipeline are kept sealed, and the driving mechanism is used for driving the sealing ring so that the sealing ring can tightly press the pore plate, and therefore the two ends of the pore plate can be kept sealed with the sealing ring and the second pipeline correspondingly. According to the utility model, the sealing ring can be far away from the pore plate for a certain distance, so that the pore plate can be directly taken down from the connecting seat, the pore plate can be quickly replaced, and the convenience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, and particularly relates to an orifice plate flow meter. Background Art

[0002] An orifice plate flow meter is a differential pressure flow meter. An orifice plate is arranged in a pipeline. When the fluid filling the pipeline flows through the orifice plate in the pipeline, the fluid locally contracts, the flow velocity increases, and a pressure difference is generated on both the upstream and downstream sides thereof. According to the measured pressure difference value, the flow rate in the pipeline can be calculated by using the Bernoulli equation.

[0003] For the currently applied orifice plate flow meter, generally, a flange is respectively connected to the upstream pipeline and the downstream pipeline, and the two are connected through the flange, and an orifice plate is arranged between the two flanges. Different orifice plates are adopted for different situations, and it is necessary to disassemble the flange to remove the orifice plate for replacement, which is rather inconvenient. Summary of the Utility Model

[0004] Aiming at the deficiencies existing in the prior art, the utility model provides an orifice plate flow meter, which can solve or at least alleviate one or more of the above problems and other problems existing in the prior art.

[0005] The utility model provides an orifice plate flow meter, comprising:

[0006] A first pipeline and a second pipeline which are oppositely arranged;

[0007] A connecting seat for fixedly connecting the lower ends of the first pipeline and the second pipeline together;

[0008] An orifice plate arranged between the first pipeline and the second pipeline;

[0009] A sealing ring, one end of which is sleeved on the first pipeline and is kept sealed with the first pipeline, and can move along the axial direction of the first pipeline;

[0010] A driving mechanism for driving the sealing ring so that the sealing ring presses the orifice plate, so that both ends of the orifice plate are respectively kept sealed with the sealing ring and the second pipeline.

[0011] Preferably, an annular installation groove is formed in one end of the first pipeline facing the second pipeline; a first sealing ring and a second sealing ring are respectively arranged on two opposite side walls of the installation groove;

[0012] The sealing ring comprises:

[0013] An annular pressing part which can move along the axial direction of the first pipeline and then abuts against the orifice plate; and

[0014] An annular sliding part, one end of which is fixedly connected to the surface of the annular pressing part facing the first pipe, and the other end of which is in sliding fit with the mounting groove;

[0015] Both the inner and outer sides of the annular sliding part are in contact with the first sealing ring and the second sealing ring respectively; at least one third sealing ring is arranged on the surface of the annular pressing part facing the orifice plate.

[0016] Preferably, the sealing ring further includes:

[0017] An annular shielding part, one end of which is connected to the inner wall of the annular pressing part, and the other end of which is in contact with the inner wall of the first pipe.

[0018] Preferably, the upper end of the connecting seat has a positioning surface adapted to the lower end of the orifice plate.

[0019] Preferably, at least one fourth sealing ring is arranged on the surface of the second pipe facing the orifice plate.

[0020] Preferably, the driving mechanism includes:

[0021] Connecting arms, a plurality of which are provided, and the ends of the connecting arms are fixedly connected to the outer wall of the annular pressing part;

[0022] First sleeves, which are arranged in one-to-one correspondence with the connecting arms, one end of each first sleeve is fixedly connected to the connecting arm, and the axis of the first sleeve is parallel to the axis of the first pipe;

[0023] Second sleeves, which are arranged in one-to-one correspondence with the first sleeves, and the second sleeves are fixedly connected to the outer wall of the first pipe;

[0024] Drive rods, which are arranged in one-to-one correspondence with the second sleeves, one end of each drive rod passes through the second sleeve and is threadedly connected to the first sleeve, and the drive rod is rotatably connected to the second sleeve;

[0025] Drive gears, which are arranged in one-to-one correspondence with the drive rods, and the drive gears are coaxially and fixedly connected to the drive rods; and

[0026] A toothed ring, which is coaxially and rotatably arranged outside the first pipe, and the toothed ring meshes with all the drive gears.

[0027] Preferably, a plurality of jacks are formed on the outer wall of the toothed ring.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] In the technology of the present utility model, driven by a driving mechanism, after the sealing ring moves, it can press the orifice plate against the end of the second pipeline, so that both ends of the orifice plate are sealed with the sealing ring and the second pipeline respectively. When the orifice plate needs to be replaced, the sealing ring moves away from the orifice plate by a certain distance, and the orifice plate can be directly removed from the connecting seat, thus realizing the rapid replacement of the orifice plate and improving the convenience. Brief Description of the Drawings

[0030] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally marked with similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to actual scale.

[0031] Figure 1 Is a perspective view of an orifice plate flowmeter in an embodiment of the present utility model;

[0032] Figure 2 Is Figure 1 A cross-sectional view of;

[0033] Figure 3 Is Figure 1 An exploded view of;

[0034] Figure 4 Is Figure 3 Another schematic diagram of;

[0035] Reference Numerals:

[0036] 10. First pipeline; 11. Installation groove; 12. First sealing ring; 13. Second sealing ring;

[0037] 20. Second pipeline; 21. Fourth sealing ring;

[0038] 30. Connecting seat; 31. Positioning surface;

[0039] 40. Sealing ring; 41. Annular pressing portion; 42. Annular sliding portion; 43. Third sealing ring; 44. Annular shielding portion;

[0040] 50. Driving mechanism; 51. Connecting arm; 52. First sleeve; 53. Second sleeve; 54. Driving rod; 55. Driving gear; 56. Tooth ring; 57. Insertion hole;

[0041] 60. Orifice plate. Specific Embodiments

[0042] The following will describe in detail the embodiments of the technical solutions of the present utility model with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0043] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the ordinary meanings understood by those skilled in the art to which this utility model belongs.

[0044] In the description of this application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this utility model.

[0045] In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. In the description of this utility model, the meaning of "a plurality of" is two or more, unless otherwise specifically defined.

[0046] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0047] In this application, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on the top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under the bottom of" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal height than the second feature.

[0048] See Figures 1 to 4 , this embodiment provides an orifice flowmeter, including: a first pipeline 10, a second pipeline 20, a connection seat 30, an orifice plate 60, a sealing ring 40 and a driving mechanism 50.

[0049] The first pipe 10 and the second pipe 20 are arranged opposite to each other. Specifically, the first pipe 10 and the second pipe 20 are coaxial, and a certain distance is maintained between the first pipe 10 and the second pipe 20. Pressure tapping holes are provided at the upper ends of both the first pipe 10 and the second pipe 20. The lower end of the first pipe 10 and the lower end of the second pipe 20 are fixedly connected together through a connecting seat 30. The connecting seat 30 can be integrally connected to the first pipe 10 and the second pipe 20, or can be detachably connected to the first pipe 10 and the second pipe 20. An orifice plate 60 is arranged between the first pipe 10 and the second pipe 20. One end of a sealing ring 40 is sleeved on the first pipe 10 and is sealed with the first pipe 10. The sealing ring 40 can be sleeved inside the first pipe 10 or outside the first pipe 10, and the sealing ring 40 can move along the axial direction of the first pipe 10. A driving mechanism 50 is used to drive the sealing ring 40 so that the sealing ring 40 presses the orifice plate 60, so that both ends of the orifice plate 60 are respectively sealed with the sealing ring 40 and the second pipe 20.

[0050] In this embodiment, under the drive of the driving mechanism 50, after the sealing ring 40 moves, it can press the orifice plate 60 against the end of the second pipe 20, so that both ends of the orifice plate 60 are respectively sealed with the sealing ring 40 and the second pipe 20. When the orifice plate 60 needs to be replaced, the sealing ring 40 is moved away from the orifice plate 60 by a certain distance, and then the orifice plate 60 can be directly removed from the connecting seat 30, thereby realizing the rapid replacement of the orifice plate 60 and improving the convenience.

[0051] In one embodiment, an annular installation groove 11 is provided at one end of the first pipe 10 facing the second pipe 20, and a first sealing ring 12 and a second sealing ring 13 are respectively arranged on two opposite side walls of the installation groove 11.

[0052] The sealing ring 40 includes an annular pressing portion 41 and an annular sliding portion 42.

[0053] The annular pressing portion 41 can move along the axial direction of the first pipe 10 and abut against the orifice plate 60. One end of the annular sliding portion 42 is fixedly connected to the surface of the annular pressing portion 41 facing the first pipe 10. The annular sliding portion 42 can be coaxially arranged with the first pipe 10. The other end of the annular sliding portion 42 is in sliding fit with the installation groove 11. The inner and outer sides of the annular sliding portion 42 are respectively in contact with the first sealing ring 12 and the second sealing ring 13, and at least one third sealing ring 43 is arranged on the surface of the annular pressing portion 41 facing the orifice plate 60.

[0054] In this embodiment, by arranging the first sealing ring 12 and the second sealing ring 13 in the installation groove 11, when the annular sliding portion 42 is in sliding fit with the installation groove 11, the annular sliding portion 42 is in contact with the first sealing ring 12 and the second sealing ring 13, realizing the sealing between the first pipe 10 and the sealing ring 40.

[0055] In one embodiment, the sealing ring 40 further includes an annular shielding portion 44. One end of the annular shielding portion 44 is fixedly connected to the inner wall of the annular pressing portion 41, and the other end of the annular shielding portion 44 is in contact with the inner wall of the first pipe 10. The other end of the annular shielding portion 44 and the inner wall of the first pipe 10 may be in contact by means of interference fit, transition fit or clearance fit.

[0056] In this embodiment, when the annular pressing portion 41 moves away from the first pipe 10, a gap is formed between the annular pressing portion 41 and the first pipe 10. By providing the annular shielding portion 44 to shield the gap, impurities in the fluid are prevented from accumulating in the gap, thereby hindering the movement of the sealing ring 40.

[0057] In one embodiment, the upper end of the connecting seat 30 has a positioning surface 31 adapted to the lower end of the orifice plate 60. Specifically, the lower end of the orifice plate 60 may be an arc surface, and the upper end of the connecting seat 30 is also correspondingly provided as an arc surface, so that the lower end of the orifice plate 60 and the upper end of the connecting seat 30 can be closely attached together.

[0058] In this embodiment, when replacing the orifice plate 60, the orifice plate 60 is inserted downward and placed on the upper end of the connecting seat 30. The upper end surface of the connecting seat 30 supports and positions the orifice plate 60, so that the central hole of the orifice plate 60 is coaxial with the first pipe 10 and the second pipe 20.

[0059] In one embodiment, at least one fourth sealing ring 21 is provided on the surface of the second pipe 20 facing the orifice plate 60. When the sealing ring 40 presses the orifice plate 60 against the end surface of the second pipe 20, the third sealing ring 43 on the sealing ring 40 and the fourth sealing ring 21 on the end surface of the second pipe 20 are in contact with the orifice plate 60 at the same time to form a seal.

[0060] In one embodiment, the driving mechanism 50 includes a connecting arm 51, a first sleeve 52, a second sleeve 53, a driving rod 54, a driving gear 55 and a gear ring 56.

[0061] A plurality of connecting arms 51 are provided, and the end portions of the connecting arms 51 are fixedly connected to the outer wall of the annular pressing portion 41. The first sleeves 52 are provided corresponding to the connecting arms 51 one by one. One end of each first sleeve 52 is fixedly connected to the corresponding connecting arm 51, and the axis of the first sleeve 52 is parallel to the axis of the first pipe 10. The second sleeves 53 are provided corresponding to the first sleeves 52 one by one, and the second sleeves 53 are fixedly connected to the outer wall of the first pipe 10. The driving rods 54 are provided corresponding to the second sleeves 53 one by one. One end of each driving rod 54 passes through the corresponding second sleeve 53 and is threadedly connected to the first sleeve 52, and the driving rod 54 is rotatably connected to the second sleeve 53. The driving gears 55 are provided corresponding to the driving rods 54 one by one, and the driving gears 55 are coaxially and fixedly connected to the driving rods 54. The gear ring 56 is coaxially rotatably arranged outside the first pipe 10, and the gear ring 56 meshes with all the driving gears 55. Specifically, a plurality of guiding blocks are connected to the outside of the first pipe 10, and an annular guiding groove is formed in the inner ring of the gear ring 56. The guiding groove is in sliding fit with a plurality of guiding rings, so that the gear ring 56 can rotate outside the first pipe 10.

[0062] In this embodiment, by rotating the gear ring 56, a plurality of driving gears 55 are driven to rotate simultaneously, and then a plurality of driving rods 54 are driven to rotate simultaneously, and the rotation directions of the plurality of driving rods 54 are the same, so as to realize the first sleeve 52 moving away from or approaching the second sleeve 53, and the plurality of first sleeves 52 move synchronously, and then drive the sealing ring 40 to approach or move away from the orifice plate 60.

[0063] In one embodiment, a plurality of jacks 57 are formed in the outer wall of the gear ring 56. Specifically, the jacks 57 can extend radially along the gear ring 56, and the jacks 57 can also extend axially along the gear ring 56. By inserting a tool such as a rod-shaped handle into the jacks 57 and using the handle to turn the gear ring 56, it is more labor-saving and convenient.

[0064] In the description of the present utility model, a large number of specific details are set forth. However, it can be understood that the embodiments of the present utility model can be practiced without these specific details. In some instances, well-known methods, structures and technologies are not shown in detail so as not to obscure the understanding of this description.

[0065] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present utility model, and they should all be covered by the scope of the claims and the description of the present utility model.

Claims

1. An orifice flow meter, characterized in that: include: A first pipeline (10) and a second pipeline (20) arranged opposite to each other; A connecting seat (30) for fixedly connecting the lower end of the first pipe (10) and the lower end of the second pipe (20); an orifice plate (60) disposed between the first pipeline (10) and the second pipeline (20); A sealing ring (40), one end of which is sleeved on the first pipe (10) and maintains a seal with the first pipe (10), and is capable of moving along the axial direction of the first pipe (10); The driving mechanism (50) is used to drive the sealing ring (40) so that the sealing ring (40) presses the orifice plate (60), thereby maintaining a seal between the two ends of the orifice plate (60) and the sealing ring (40) and the second pipe (20), respectively.

2. An orifice flowmeter as claimed in claim 1, characterized in that: An annular installation groove (11) is provided on one end of the first pipe (10) facing the second pipe (20); a first sealing ring (12) and a second sealing ring (13) are respectively provided on two opposite side walls of the installation groove (11); The sealing ring (40) comprises: an annular pressing portion (41) capable of moving along the axial direction of the first pipe (10) and then abutting against the orifice plate (60); and An annular sliding portion (42), one end of which is fixedly connected to a surface of the annular pressing portion (41) facing the first pipe (10), and the other end of which is slidably engaged with the mounting groove (11); The inner and outer sides of the annular sliding portion (42) are in contact with the first sealing ring (12) and the second sealing ring (13) respectively; and at least one third sealing ring (43) is provided on the surface of the annular pressing portion (41) facing the orifice plate (60).

3. An orifice flowmeter as claimed in claim 2, characterized in that: The sealing ring (40) further comprises an annular shielding portion (44); one end of the annular shielding portion (44) is connected to the inner wall of the annular pressing portion (41), and the other end of the annular shielding portion (44) is in contact with the inner wall of the first pipe (10).

4. An orifice flowmeter as claimed in claim 3, characterized in that: The upper end of the connecting seat (30) has a positioning surface (31) adapted to the lower end of the orifice plate (60).

5. An orifice flowmeter as claimed in claim 4, characterized in that: At least one fourth sealing ring (21) is provided on the surface of the second pipe (20) facing the orifice plate (60).

6. An orifice flowmeter according to any one of claims 2 to 5, characterized in that: The driving mechanism (50) comprises: A plurality of connecting arms (51) are provided, and ends of the connecting arms (51) are fixedly connected to the outer wall of the annular pressing portion (41); A first sleeve (52) is arranged in one-to-one correspondence with the connecting arm (51), one end of the first sleeve (52) is fixedly connected to the connecting arm (51), and the axis of the first sleeve (52) is parallel to the axis of the first pipe (10); A second sleeve (53) is arranged in one-to-one correspondence with the first sleeve (52), and the second sleeve (53) is fixedly connected to the outer wall of the first pipe (10); a driving rod (54) arranged in one-to-one correspondence with the second sleeve (53); one end of the driving rod (54) passes through the second sleeve (53) and is threadedly connected to the first sleeve (52); the driving rod (54) is rotatably connected to the second sleeve (53); a driving gear (55), the driving gear (55) being arranged in one-to-one correspondence with the driving rod (54), and the driving gear (55) being coaxially fixedly connected with the driving rod (54); and A gear ring (56) is coaxially rotatably arranged outside the first pipe (10), and the gear ring (56) is meshed with all the driving gears (55).

7. An orifice flow meter as claimed in claim 6, characterized in that: A plurality of insertion holes (57) are formed on the outer wall of the gear ring (56).

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