Pre-tightening adjustable vortex shedding flowmeter probe

Abstract

The utility model provides a pre-tightening adjustable vortex shedding flowmeter probe which comprises a shell and a signal transmission seat, and the signal transmission seat comprises a first end arranged in the shell and a second end extending out of the shell; the process fluid sensor is mounted at the first end of the signal transmission seat; the elastic energy storage mechanism is arranged in the shell, the elastic energy storage mechanism comprises a fixed part and an elastic movable assembly which are oppositely arranged, the movable assembly makes contact with the side, away from the signal transmission base, of the process fluid sensor, and the fixed part is fixed to the shell and compresses the elastic movable assembly; and the adjusting pin extends into the shell, is matched with the inclined surface of the signal transmission seat, and is used for adjusting the compression amount of the elastic movable component. According to the scheme, the function of adjusting the pre-tightening force is added.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluid detection, in particular to a vortex flowmeter probe with adjustable preload. Background Art

[0002] The existing vortex flowmeter probe with adjustable preload has a high signal frequency due to the vortex phenomenon, and the frequency of the periodic alternating stress reflected in the probe is also high. The original probe has a seesaw fixed on the inner wall of the shell between the probe base and the shell to ensure the probe preload. However, under long-term operation, the wear of the seesaw continues to accumulate, resulting in the relaxation of the probe preload and the weakening of the charge signal under the same excitation; when the seesaw wears to a certain extent, the detection function of the probe is completely lost. And because the probe shell is welded and closed, it is impossible to intervene or repair the inside of the probe from the outside, and the entire probe of the vortex flowmeter must be replaced, which is costly. Utility Model Content

[0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a vortex flowmeter probe with adjustable preload to solve the above-mentioned problems.

[0004] In order to achieve the above-mentioned purpose and other related purposes, the utility model provides a vortex flowmeter probe with adjustable preload, comprising:

[0005] case,

[0006] A signal transmission seat, the signal transmission seat comprising a first end disposed in the housing and a second end extending out of the housing;

[0007] a process fluid sensor mounted on the first end of the signal transmission seat;

[0008] An elastic energy storage mechanism is arranged in the housing, the elastic energy storage mechanism comprises a fixing member and an elastic movable component which are arranged opposite to each other, the elastic movable component contacts a side of the process fluid sensor which is away from the signal transmission seat, the fixing member is fixed to the housing and compresses the elastic movable component;

[0009] An adjusting pin is inserted into the housing and matched with the signal transmission seat through an inclined surface, so as to adjust the compression amount of the elastic movable component.

[0010] Optionally, a metal film seat is provided at the second end of the signal transmission seat, and the metal film seat includes an integrally formed seat body and a metal diaphragm, the seat body is fixed to the signal transmission seat, and the metal diaphragm is provided at one end of the seat body away from the signal transmission seat.

[0011] Optionally, a limiting boss is disposed at the first end of the signal transmission seat, and a side of the limiting boss close to the second end is an inclined surface for cooperating with the adjusting pin.

[0012] Optionally, a conical surface is provided on the adjusting pin, and the conical surface cooperates with the inclined surface.

[0013] Optionally, the elastic movable assembly includes a first elastic member, and the first elastic member is arranged between the fixing member and the process fluid sensor.

[0014] Optionally, the elastic movable assembly includes a first elastic component, a second elastic component and a movable seat, the movable seat is arranged opposite to the fixed component, the second elastic component is arranged between the movable seat and the fixed component, and the first elastic component is arranged between the movable seat and the process fluid sensor.

[0015] Optionally, the housing includes a first shell and a second shell, the first shell and the second shell are fixedly connected, and the signal transmission socket is arranged on the second shell.

[0016] Optionally, a sealing assembly is provided on the first housing, and a wire of the process fluid sensor passes through the elastic energy storage mechanism and the sealing assembly and then extends out of the housing.

[0017] As described above, the vortex flowmeter probe with adjustable preload of the utility model has the following beneficial effects:

[0018] It should be noted that during the signal transmission process of the signal transmission seat, there will be constant swinging and vibration, which will cause wear and tear on the contact surface between the signal transmission seat and the shell. Therefore, an adjustment pin is set, which plays the role of a supporting point in the lever principle. When the probe is worn or the preload is loose, the internal preload can be compensated by adjusting the tightness of the thread on site to avoid replacing the entire probe. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the internal structure of a vortex flowmeter probe with adjustable preload in an embodiment of the utility model.

[0020] Figure 2 for Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0021] The figure marks in the drawings of the specification include: shell 1, second shell 101, first shell 102, signal transmission seat 2, limiting boss 201, inclined surface 202, elastic energy storage mechanism 3, fixing part 301, second elastic component 302, movable seat 303, first elastic component 304, process fluid sensor 4, metal diaphragm seat 5, seat body 501, metal diaphragm 502, sealing assembly 6, adjusting pin 7, cone surface 8.

[0022] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0023] The utility model provides a vortex flowmeter probe with adjustable preload, such as Figure 1 and Figure 2 shown.

[0024] In an exemplary embodiment, a vortex flowmeter probe with adjustable preload includes:

[0025] Shell 1,

[0026] The signal transmission seat 2 includes a first end disposed in the housing 1 and a second end extending out of the housing 1;

[0027] A process fluid sensor 4 is mounted on a first end of the signal transmission seat 2;

[0028] The elastic energy storage mechanism 3 is arranged in the housing 1. The elastic energy storage mechanism 3 includes a fixing member 301 and an elastic movable component which are arranged opposite to each other. The elastic movable component contacts a side of the process fluid sensor which is away from the signal transmission seat 2. The fixing member 301 is fixed to the housing 1 and compresses the elastic movable component.

[0029] The adjusting pin 7 extends into the housing 1 and cooperates with the signal transmission seat 2 through an inclined surface, so as to adjust the compression amount of the elastic movable component.

[0030] It should also be noted that during the signal transmission process of the signal transmission seat 2, there will be constant swinging and vibration, which will cause wear and tear on the contact surface between the signal transmission seat 2 and the housing 1. Therefore, an adjustment pin 7 is provided, and the adjustment pin 7 plays the role of a supporting point in the lever principle. When the probe is worn or the preload is loose, the internal preload can be compensated by adjusting the tightness of the thread on site to avoid replacing the entire probe.

[0031] In an exemplary embodiment, a metal membrane seat 5 is provided at the second end of the signal transmission seat 2. The metal membrane seat 5 includes an integrally formed seat body 501 and a metal diaphragm 502. The seat body 501 is fixed to the signal transmission seat 2. The metal diaphragm 502 is provided at one end of the seat body 501 away from the signal transmission seat 2.

[0032] In this embodiment, a seat body 501 is provided between the metal diaphragm 502 and the signal transmission seat 2, and the seat body 501 and the metal diaphragm 502 are integrally formed to prevent the metal diaphragm 502 from being separated from the seat body 501. Compared with directly fixing the metal diaphragm 502 to the end of the signal transmission seat 2, the connection position is not set at the location of the metal diaphragm 502, which reduces the possibility of the metal diaphragm 502 falling off due to the influence of the medium.

[0033] In an exemplary embodiment, a limiting boss 201 is disposed at the first end of the signal transmission seat 2 , and a side of the limiting boss 201 close to the second end is an inclined surface 202 for cooperating with the adjusting pin 7 .

[0034] In this embodiment, the limiting boss 201 serves to prevent the signal transmission seat 2 from being separated from the housing 1 , and the inclined surface 202 is provided so as to cooperate with the adjusting pin 7 to realize the preload adjustment.

[0035] In an exemplary embodiment, a conical surface 8 is provided on the adjusting pin 7 , and the conical surface 8 matches with the inclined surface 202 .

[0036] It should be noted that any inclined surface or conical surface provided on the lower surface of the adjusting pin 7 and the limiting boss 201 can achieve the adjusting function in the present application.

[0037] In addition, the adjusting pin 7 is threadedly matched with the housing 1. The adjusting pin 7 serves as a medium for external intervention of the probe. A conical pin with a thread self-locking function is adopted, which can realize various advanced functions such as controllable initial indication voltage of the vortex flowmeter probe with adjustable preload, convenient adjustment of preload relaxation, and rapid maintenance of support point wear. It reduces the frequency of on-site probe replacement, extends the service life of the probe, and reduces the total life cycle cost of the vortex flowmeter probe with adjustable preload.

[0038] In an exemplary embodiment, the elastic movable assembly includes a first elastic member 304 disposed between the fixture 301 and the process fluid sensor.

[0039] In this embodiment, the process fluid sensor is pre-compressed in the signal transmission seat 2 by an elastic movable component, so that the piezoelectric sheet in the process fluid sensor is pre-deformed. When the periodic vortex signal inside the medium is transmitted to the vortex signal transmission seat 2, the accumulation and release of the surface charge of the piezoelectric sheet is changed through the micro-deformation of the piezoelectric sheet, and the vortex shedding frequency on both sides of the vortex tail is quickly responded to, thereby providing real-time feedback on the medium flow.

[0040] In an exemplary embodiment, the elastic movable assembly includes a first elastic component 304, a second elastic component 302 and a movable seat 303, the movable seat 303 is arranged opposite to the fixed component 301, the second elastic component 302 is arranged between the movable seat 303 and the fixed component 301, and the first elastic component 304 is arranged between the movable seat 303 and the process fluid sensor.

[0041] Exemplarily, the first elastic component 304 and the second elastic component 302 can be disc springs, and the double disc spring structure can realize double pre-compression deformation and energy storage of the internal components of the probe. The double disc spring provides greater elastic support force and better vertical stability for the internal components of the probe. On the one hand, it can make up for the gap problem caused by the inconsistent thermal expansion of the internal components of the process fluid sensor and the stainless steel shell 1 under high temperature conditions. On the other hand, the energy storage effect of the disc spring can compensate for the relaxation of the preload force, avoiding signal attenuation caused by wear of the support surface of the signal transmission seat 2 (the lower surface of the limit boss).

[0042] In an exemplary embodiment, the housing 1 includes a first shell 102 and a second shell 101 . The first shell 102 and the second shell 101 are fixedly connected, and the signal transmission socket 2 is disposed on the second shell 101 .

[0043] Exemplarily, the first shell 102 and the second shell 101 are laser welded, and the second shell 101 and the fixing member 301 are laser welded.

[0044] In an exemplary embodiment, a sealing assembly 6 is disposed on the first housing 102 , and a wire of the process fluid sensor 4 passes through the elastic energy storage mechanism 3 and the sealing assembly 6 and then extends out of the housing 1 .

[0045] Exemplarily, the sealing component 6 is made of epoxy resin material, and sealing is achieved by heat preservation and curing.

[0046] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A vortex flowmeter probe with adjustable preload, characterized in that: include: case, A signal transmission seat, the signal transmission seat comprising a first end disposed in the housing and a second end extending out of the housing; a process fluid sensor mounted on the first end of the signal transmission seat; An elastic energy storage mechanism is arranged in the housing, the elastic energy storage mechanism comprises a fixing member and an elastic movable component which are arranged opposite to each other, the elastic movable component contacts a side of the process fluid sensor which is away from the signal transmission seat, the fixing member is fixed to the housing and compresses the elastic movable component; An adjusting pin is inserted into the housing and matched with the signal transmission seat through an inclined surface, so as to adjust the compression amount of the elastic movable component.

2. The vortex flowmeter probe with adjustable preload according to claim 1, characterized in that: A metal film seat is disposed at the second end of the signal transmission seat. The metal film seat comprises an integrally formed seat body and a metal film. The seat body is fixed to the signal transmission seat. The metal film is disposed at one end of the seat body away from the signal transmission seat.

3. The vortex flowmeter probe with adjustable preload according to claim 1, characterized in that: A limiting boss is arranged at the first end of the signal transmission seat, and a side of the limiting boss close to the second end is an inclined surface for cooperating with the adjusting pin.

4. The vortex flowmeter probe with adjustable preload according to claim 3, characterized in that: The adjusting pin is provided with a conical surface, and the conical surface matches the inclined surface.

5. The vortex flowmeter probe with adjustable preload according to claim 1, characterized in that: The elastic movable assembly includes a first elastic component, a second elastic component and a movable seat, the movable seat is arranged opposite to the fixing member, the second elastic component is arranged between the movable seat and the fixing member, and the first elastic component is arranged between the movable seat and the process fluid sensor.

6. The vortex flowmeter probe with adjustable preload according to any one of claims 1 to 5, characterized in that: The housing comprises a first shell and a second shell, the first shell and the second shell are fixedly connected, and the signal transmission socket is arranged on the second shell.

7. The vortex flowmeter probe with adjustable preload according to claim 6, characterized in that: The first housing is provided with a sealing assembly, and the wire of the process fluid sensor passes through the elastic energy storage mechanism and the sealing assembly and then extends out of the housing.

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