Tuning fork type measuring meter and measuring device comprising tuning fork type measuring meter

Abstract

The utility model provides a tuning fork type measuring meter and a measuring device comprising the tuning fork type measuring meter. The tuning fork type measuring meter comprises an upper base, a lower base and a vibration fork body. At least one upper through hole is formed in the upper base in the axial direction in a penetrating mode. The lower base is provided with a first upper side face and a first lower side face which are oppositely arranged in the axial direction, at least one lower blind hole which is open towards the first upper side face is formed in the lower base in the axial direction, the lower base is coaxially and fixedly connected to the upper base from the axial lower portion of the upper base, and the first upper side face and the first lower side face are oppositely arranged in the axial direction. The lower blind holes are arranged below the upper through holes in the axial direction in a one-to-one correspondence mode relative to the upper through holes. The vibration fork body extends out of the first lower side face of the lower base. The tuning fork type measuring meter with the structure is convenient to process and easy to assemble.

Description

Technical Field

[0001] The utility model relates to a measuring meter, in particular to a tuning fork type measuring meter. Background Art

[0002] This section provides background information related to the present invention which does not necessarily constitute prior art.

[0003] Tuning fork type meters are widely used in the industrial field, and can be used, for example, to measure the density or viscosity of industrial fluids. Tuning fork type meters are designed and manufactured using the tuning fork vibration principle. The tuning fork type meters in the prior art generally include a tuning fork base, a vibrating fork body, and a signal input component and a signal output component accommodated in the tuning fork base. Usually, the signal input component and the signal output component are respectively accommodated in two continuously extending deeper (usually 50-60 mm) blind holes opened on the tuning fork base, and the bottom of the blind hole is a vibration area.

[0004] The prior art tuning fork type measuring meter has the following disadvantages: the blind hole in the tuning fork base is usually made with the aid of a drill bit, and the drill bit is easily broken during the process of machining the blind hole, resulting in high machining costs and increased machining difficulty. In addition, since it is difficult to observe the travel position of the drill bit during the drilling process, it is difficult to accurately control the thickness of the vibration area at the bottom of the blind hole, and the thickness of the vibration area is crucial to the desired vibration state. At the same time, since the blind hole is deep, the installation steps of the signal input component and the signal output component in the blind hole are very cumbersome and it is difficult to ensure the accurate positioning of the two relative to the tuning fork base. The above problems need to be solved urgently. Utility Model Content

[0005] The utility model aims to provide a tuning fork type measuring meter and a measuring device comprising the tuning fork type measuring meter, so as to achieve at least one of the following purposes: simplifying processing steps, reducing processing costs, accurately controlling the thickness of the vibration area, simplifying assembly steps and improving assembly accuracy.

[0006] The utility model provides a tuning fork type measuring meter, which comprises an upper base, a lower base and a vibrating fork body. At least one upper through hole is axially penetrated on the upper base. The lower base has a first upper side surface and a first lower side surface arranged axially opposite to each other, and at least one lower blind hole is axially opened on the lower base and opened toward the first upper side surface, wherein the number of the upper through holes and the lower blind holes are the same and the positions correspond, so that when the lower base is connected to the upper base, the lower blind holes are respectively connected and aligned with the upper through holes. The vibrating fork body extends from the first lower side surface of the lower base.

[0007] In the split tuning fork measuring meter with the above configuration, since the upper base and the lower base are two separate components before assembly, the upper through hole in the upper base and the lower blind hole in the lower base can be processed independently, which reduces the processing difficulty and saves processing costs compared with the prior art and can accurately control the thickness of the vibration area.

[0008] Preferably, the ratio of the axial length of the upper through hole to the axial length of the lower blind hole is between 1:1 and 4:1.

[0009] Within this range, the optimal balance between processing difficulty and processing cost can be achieved while ensuring product functionality and precisely controlling the thickness of the vibration area.

[0010] Preferably, the upper through hole is configured such that an axial projection on the first upper side surface can cover the lower blind hole.

[0011] This design makes it easier for the upper end of the signal input component and the upper end of the signal output component to extend from the upper base.

[0012] Preferably, the lower base is connected to the upper base by means of one of welding, riveting, gluing and screwing.

[0013] Preferably, a sealing gasket or a sealing ring is provided between the lower base and the upper base, so as to be connected to the upper base in a fluid-tight manner.

[0014] Preferably, the upper base has a second upper side surface and a second lower side surface which are axially oppositely arranged, wherein the lower base is connected to the upper base in such a manner that the first upper side surface abuts against the second lower side surface.

[0015] Preferably, the lower base is connected to the upper base by means of at least two fastening screws, wherein corresponding threaded holes and through holes are opened in the upper base and the lower base to allow the at least two fastening screws to pass through the through holes in the lower base from the axial bottom of the first lower side surface and be screwed into the threaded holes of the upper base.

[0016] Preferably, the tuning fork type meter is constructed to also include a signal input component, a signal output component and a limit component for preventing the signal input component and the signal output component from shifting relative to the tuning fork type meter, wherein the axial length of the lower blind hole is designed to at least allow the lower end functional area of ​​the signal input component and the lower end functional area of ​​the signal output component to be accommodated therein.

[0017] As a result, during assembly, the functional area can be superimposed in the lower blind hole before the lower base is connected to the upper base, which simplifies installation.

[0018] The utility model also provides a measuring device, which comprises the tuning fork type measuring meter with the above configuration. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The foregoing and other features and characteristics of the present application will become more apparent from the following detailed description with reference to the accompanying drawings, which are provided as examples only and are not necessarily drawn to scale. The same reference numerals are used in the drawings to indicate the same components, in which:

[0020] Figure 1 A three-dimensional schematic diagram showing an upper base and a lower base of a tuning fork type measuring meter according to the utility model in a separated state;

[0021] Figure 2 Shown according to Figure 1 A sectional perspective view of a tuning fork measuring meter taken along line AA;

[0022] Figure 3 A three-dimensional schematic diagram showing an upper base and a lower base of a tuning fork type measuring meter according to the utility model in a connected state;

[0023] Figure 4 Shown according to Figure 3 A sectional perspective view of a tuning fork measuring meter taken along line BB;

[0024] Figure 5 A schematic diagram showing the assembly of the signal input assembly and the signal output assembly into the lower base is shown;

[0025] Figure 6 A schematic diagram showing the further assembly of the signal input assembly and the signal output assembly into the upper base is shown;

[0026] Figure 7 A schematic diagram showing the installation of the limit assembly into a tuning fork measuring meter is shown;

[0027] Figure 8 A cross-sectional schematic diagram showing the signal input component, the signal output component and the limit component being installed in place in the tuning fork measuring meter;

[0028] Fig. 9 A schematic diagram showing the lower functional area of ​​the signal input component and the lower functional area of ​​the signal output component;

[0029] Fig.10 A schematic perspective view of a densitometer / viscometer is shown.

[0030] Reference Numbers List

[0031] 1. Lower base; 11. First upper side surface; 12. First lower side surface; 13. First lower blind hole; 14. Second lower blind hole; 15. Threaded hole; 2. Upper base; 21. Second upper side surface; 22. Second lower side surface; 23. First upper through hole; 24. Second upper through hole; 3. Fastening screw; 4. Signal input component; 41. Upper end of signal input component; 42. Functional area at the lower end of signal input component; 421. First cable; 422. First piezoelectric crystal; 5. Signal output component; 51. Upper end of signal output component; 52. Functional area at the lower end of signal output component; 521. Second cable; 522. Second piezoelectric crystal; 6. Limiting component; 61. Protective element; 62. Limiting screw; 7. Vibration fork body; L. Axial; 8. Measuring device. DETAILED DESCRIPTION

[0032] The preferred embodiments of the present invention will now be described in detail in conjunction with the accompanying drawings. The following description is merely exemplary in nature and is not intended to limit the present invention and its application or use.

[0033] Certain directional terms used in the following description of the drawings will be understood to have normal meanings and refer to those directions involved when the drawings are normally viewed. Unless otherwise specified, the directional terms involved in this specification are conventional directions understood by those skilled in the art. Specifically, "upper" and "lower" refer to the following directions, respectively. Figure 8 The above and below when viewed from an angle do not refer to the orientation of the tuning fork meter in actual use.

[0034] like Figure 1 As shown, the utility model provides a tuning fork type measuring meter, which includes an upper base 2, a lower base 1 and a vibrating fork body 7, and the lower base 1 and the upper base 2 are both along the axial direction L ( Figure 8 The lower base 1 is arranged axially below the upper base 2, and the two are initially separated, but during the assembly process, the lower base 1 is fixedly connected to the upper base 2.

[0035] In this context, “fixed connection” means that the lower base 1 cannot perform any movement in any direction relative to the upper base 2 , but this does not mean that the connection between the lower base 1 and the upper base 2 is non-detachable.

[0036] Figure 1 and Figure 2The three-dimensional view and the cross-sectional view of the upper base 2 and the lower base 1 in the separated state are respectively shown. Specifically, the lower base 1 extends along the axial direction L and has a first upper side surface 11 and a first lower side surface 12 arranged opposite to each other in the axial direction L. The lower base 1 also includes at least one lower blind hole opened along the axial direction L. The lower blind hole is open toward the first upper side surface 11 and closed toward the first lower side surface 12. The axial distance between the bottom surface of the lower blind hole and the first lower side surface 12 is the thickness of the vibration area, which is generally 0.5 to 1 mm.

[0037] The upper base 2 also extends along the axial direction L and has a second upper side surface 21 and a second lower side surface 22 arranged opposite to each other in the axial direction L. The upper base 2 also includes at least one upper through hole extending through the axial direction, wherein the position and number of the upper through hole correspond to the position and number of the lower blind hole.

[0038] In this article, it is shown by way of example that the lower base 1 has a first lower blind hole 13 and a second lower blind hole 14, and the upper base 1 has a first upper through hole 23 and a second upper through hole 24. However, it should be understood by those skilled in the art that the lower base 1 may include only one lower blind hole or more than two lower blind holes, and accordingly, the upper base 2 may include only one upper through hole or more than two upper through holes. This depends on the form of the signal input component and the signal output component adopted, which is not limited in this article. The following description is based on the example that the lower base 1 includes only the first lower blind hole 13 and the second lower blind hole 14 and the upper base 2 includes only the first upper through hole 23 and the second upper through hole 24.

[0039] In particular, if Figure 2 and Figure 4 As shown, the cross-section of the first upper through hole 23 and the second upper through hole 24 perpendicular to the axial direction is gourd-shaped, that is, each includes a large hole and a small hole that are interconnected. Figure 7 As shown and described in detail below, the large hole is used to pass the protective screw 62 of the limiting assembly 6, and the small hole is used to pass the cable of the signal input assembly or the signal output assembly.

[0040] Figure 3 and Figure 4 The three-dimensional view and the cross-sectional view of the upper base 2 and the lower base 1 in the connected state are respectively shown. Specifically, the lower base 1 is connected to the upper base 2 from the axially lower side of the upper base 2. After the lower base 1 is connected to the upper base 2, the lower blind holes are aligned one by one with the upper through holes. Specifically, the first lower blind hole 13 is arranged axially below the first upper through hole 23, and the second lower blind hole 14 is arranged axially below the second upper through hole 24. Thus, the internal space of the first lower blind hole 13 is connected to the internal space of the first upper through hole 23, and the internal space of the second lower blind hole 14 is connected to the internal space of the second upper through hole 24.

[0041] See for example Figure 1 and Figure 3 The vibration fork body 7 is designed to extend from the first lower side surface 12 of the lower base 1. The vibration fork body 7 is generally designed to be fixedly connected to the lower base 1. The specific connection method between the vibration fork body 7 and the lower base 1 in this article is the same as the connection method between the vibration fork body 7 and the tuning fork base in the prior art, and will not be repeated in this article.

[0042] In this article, through this split-design tuning fork measuring meter, a deeper blind hole in the prior art is designed as a superposition of a through hole and a shallower blind hole. For example, the axial length of the deeper blind hole in the prior art is L1, the axial length of the upper through hole in this article is L2, and the axial length of the lower blind hole is L3, where L1=L2+L3. Those skilled in the art should know that, under the premise of the same axial length, the processing difficulty of the through hole is lower than that of the blind hole, and the processing cost is also lower than that of the blind hole. Therefore, when L2 is less than L1, the upper through hole in this article can be processed and prepared with lower difficulty and lower cost. Those skilled in the art should also understand that, in the case of both being blind holes, a blind hole with an axial length of L3 should be easier and more accurately prepared than a blind hole with an axial length of L1. For example, a shorter drill bit can be used, so that the drill bit is not easy to break and can be processed in one go. In addition, the axial length of the shorter blind hole can be controlled more accurately, thereby accurately controlling the thickness of the vibration area. It can be seen that the overall processing difficulty and processing cost of the upper through hole and the lower blind hole in this article should be much smaller than the processing difficulty and processing cost of a deeper blind hole in the prior art.

[0043] Herein, the ratio of the axial length of the upper through hole to the axial length of the lower blind hole is designed to be between 1:1 and 4:1. For example, the axial length of the upper through hole is 40 mm, and the axial length of the lower blind hole is 10 mm; or the axial length of the upper through hole is 25 mm, and the axial length of the lower blind hole is 25 mm. Within this range, the optimal balance between processing difficulty and processing cost can be achieved while ensuring the product's use function and accurately controlling the thickness of the vibration area.

[0044] On this basis, the axial length of the lower blind hole is further designed to at least accommodate the lower end functional area 42 of the signal input component and the lower end functional area 52 of the signal output component (see Fig. 9 ), which further enables convenient and reliable assembly of the tuning fork measuring meter.

[0045] The lower base 1 can be fixedly connected to the upper base 2 by means of welding, riveting, gluing, screwing or other connection methods known in the prior art.

[0046] The following describes the connection method of the lower base 1 and the upper base 2 by taking the method of fixing the lower base 1 to the upper base 2 by means of fastening screws as an example. Figure 6The tuning fork meter also includes at least two fastening screws 3 (four fastening screws are shown in this example). Four through holes 15 are provided on the lower base 1 from the first upper side 11 to the first lower side 12. Corresponding threaded holes (not shown) are provided on the upper base 2 from the second lower side 22. During assembly, the fastening screws 3 pass through the through holes 15 in the lower base 1 from the first lower side 12, and are further screwed into the corresponding threaded holes in the upper base 2 until the screws are fixed. Figure 3 and Figure 4 The first upper side 11 is shown to abut against the second lower side 22 .

[0047] When the tuning fork meter described herein is used to measure certain liquid and solid media, it is desirable that the upper base 2 and the lower base 1 are connected in a fluid-tight manner to prevent the medium to be measured from entering the upper through hole and the lower blind hole. To achieve this purpose, for example, when the lower base 1 and the upper base 2 are screwed together as described above, a sealing gasket or a sealing ring (not shown in the figure) can be provided between the first upper side surface 11 and the second lower side surface 22.

[0048] The specific implementation methods of the above other connection solutions are known to those skilled in the art and will not be described in detail herein.

[0049] The tuning fork type measuring meter is constructed to further include a commercially available signal input component, a signal output component and a limit component. Figures 5 to 9 The figure shows one of the signal input components 4, signal output components 5 and limit components 6 by way of example, wherein the signal input component 4 will be accommodated in the first lower blind hole 13 and the first upper through hole 23, and the signal output component 5 will be accommodated in the second lower blind hole 14 and the second upper through hole 24.

[0050] The signal input assembly 4 has an axially opposite upper end 41 and a lower end functional area 42. Similarly, the signal output assembly 5 also has an axially opposite upper end 51 and a lower end functional area 52. The upper end 41 of the signal input assembly and the upper end 51 of the signal output assembly are used to receive / transmit electrical energy and / or signals from / to the outside.

[0051] In this context, “functional area” refers to the axial region of the signal input component 4 and the signal output component 5 that performs the core vibration function. Fig. 9, the axial range of the lower functional area 42 of the signal input component and the lower functional area 52 of the signal output component are shown in FIG. Among them, the sum of the two contact sides of the first cable 421 in the signal input component 4 and the first piezoelectric crystal 422 and other components located therebetween can be regarded as the lower functional area 42 of the signal input component 4, and the sum of the two contact sides of the second cable 521 in the signal output component 5 and the second piezoelectric crystal 522 and other components located therebetween can be regarded as the lower functional area 52 of the signal output component. The configurations of other components in the signal input component 4 and the signal output component 5 are all known in the prior art and will not be described in detail herein.

[0052] Those skilled in the art should understand that the axial range of the lower end functional area and the specific components it includes may vary according to the different types of signal input components and signal output components used.

[0053] Combine the following Figures 5 to 8 The assembly process of the tuning fork measuring meter according to the utility model is described.

[0054] First step, see Figure 5 First, assemble the signal input component 4 and the signal output component 5 into the lower base 1.

[0055] Specifically, the lower end functional area 42 of the signal input component is placed in the first lower blind hole 13, and the lower end functional area 52 of the signal output component is placed in the second lower blind hole 14, and at the same time, the upper end 41 of the signal input component extends from the first upper side surface 11, and the upper end 51 of the signal output component extends from the first upper side surface 11.

[0056] For further information, see Fig. 9 During assembly, the lower contact side of the first cable 421 can be placed on the bottom surface of the first lower blind hole 13, and then the first piezoelectric crystal 422 and the insulating sleeve and other components are superimposed on the lower contact side of the first cable 421, and then the upper contact side of the first cable 421 is superimposed on the first piezoelectric crystal 422. The assembly process of the signal output component 5 is the same as that of the signal input component 4.

[0057] Step 2, see Figure 6 , the lower base 1 is moved axially downward of the upper base 2, so that the upper end 41 of the signal input component and the upper end of the signal output component 5 respectively pass through the upper through hole of the upper base 2, and then extend out from the second upper side surface 21. Specifically, the upper end 41 of the signal input component can pass through the first upper through hole 23, and the upper end 51 of the signal output component can pass through the second upper through hole 24.

[0058] The third step is to fix the upper base 2 and the lower base 1 together.

[0059] exist Figure 6In the process, the screw is passed from the first lower side 12 into the through hole 15 in the lower base 1, and is further screwed into the threaded hole in the upper base 2 until the first upper side 11 and the second lower side 22 abut against each other.

[0060] The fourth step is to install the limit assembly 6 to the tuning fork measuring meter.

[0061] This article takes the limiting assembly 6 including the protective element 61 and the limiting screw 62 as an example for introduction. Those skilled in the art should understand that the configuration of the limiting assembly 6 is not limited to this, and other structures in the prior art that can be used to limit the movement of the signal input assembly 4 and the signal output assembly relative to the upper base 2 and the lower base 1 are also applicable to the present utility model.

[0062] Specifically, the protective element 61 is superimposed on the upper contact side of the first cable 421 and the second cable 521 through the first upper through hole 23 and the second upper through hole 24, respectively, and then the limit screw 62 is inserted into and screwed into the first upper through hole 23 and the second upper through hole 24 until the limit screw 62 abuts against the protective element 61. Figure 8 When the stop screw 62 is used, female threads are provided on the upper portions of the inner circumferences of the first upper through hole 23 and the second upper through hole 24 . Figure 8 A cross-sectional view of the tuning fork measuring meter is shown after the limit assembly 6 is installed in place.

[0063] In a preferred case, the axial dimension of the lower blind hole may be designed to be longer, so that the protective element 61 is also overlapped on the upper contact sides of the first cable 421 and the second cable 521 in the first step.

[0064] Compared with the prior art, the assembly process of the tuning fork type measuring meter according to the utility model can achieve at least the following beneficial effects: Taking the signal input component 4 as an example, since the lower end functional area 42 thereof includes a large number of components and these components need to be arranged in the first lower blind hole 13 in an axially stacked manner, when the axial length of the first lower blind hole 13 is designed to at least accommodate the lower end functional area 42, the lower end functional area 42 can be directly stacked on the bottom surface of the first lower blind hole 13 before the lower base is connected to the upper base, so that the lower end functional area 42 does not need to pass through the first upper through hole 23 to reach the installation position, which simplifies the installation. In addition, since the axial dimension of the lower blind hole is short, the operator can directly observe the stacking process of the components in the lower end functional area 42 on the bottom surface of the first lower blind hole 13, which improves the installation accuracy.

[0065] In addition, although the upper through hole and the lower through hole are shown in the same radial shape and size herein, it should be understood by those skilled in the art that this need not necessarily be the case. In a preferred embodiment, the size of the upper through hole is designed to be larger than the size of the lower blind hole. Specifically, the axial projection of the upper through hole on the first upper side surface 11 can cover the lower blind hole. This design makes it easier for the upper end 41 of the signal input assembly and the upper end 51 of the signal output assembly to extend from the upper base 2.

[0066] The utility model also provides a measuring device 8, which includes a tuning fork measuring meter having the above configuration. The measuring device 8 can be, for example, Fig.10 In the density meter / viscometer shown, the tuning fork type measuring meter according to the utility model is arranged at the lower end of the entire measuring device 8. The density meter / viscometer may also include mechanisms such as sensors and signal transmitters.

[0067] The above describes the preferred embodiments according to the present invention in conjunction with the specific embodiments. It is understood that the above description is only exemplary and not restrictive. Without departing from the scope of the present invention, those skilled in the art can think of various variations and modifications with reference to the above description. These variations and modifications are also included in the protection scope of this application.

Claims

1. A tuning fork measuring meter, characterized in that: include: An upper base (2), wherein at least one upper through hole is formed on the upper base (2) along the axial direction (L); A lower base (1), the lower base (1) comprising a first upper side surface (11) and a first lower side surface (12) which are arranged opposite to each other in an axial direction (L), and at least one lower blind hole which is open toward the first upper side surface (11) is provided in the lower base (1) in an axial direction (L), wherein the upper through holes are the same in number as the lower blind holes and are located in corresponding positions, so that when the lower base (1) is connected to the upper base (2), the lower blind holes are respectively connected and aligned with the upper through holes; and A vibrating fork body (7), the vibrating fork body (7) protruding from a first lower side surface (12) of the lower base (1).

2. The tuning fork measuring meter according to claim 1, characterized in that: The ratio of the axial length of the upper through hole to the axial length of the lower blind hole is between 1:1 and 4:

1.

3. The tuning fork measuring meter according to claim 1, characterized in that: The upper through hole is configured such that an axial projection on the first upper side surface (11) can cover the lower blind hole.

4. The tuning fork measuring meter according to claim 1, characterized in that: The lower base (1) is connected to the upper base (2) by means of one of welding, riveting, gluing and threaded connection.

5. The tuning fork measuring meter according to claim 4, characterized in that: A sealing gasket or a sealing ring is provided between the lower base (1) and the upper base (2), so that the lower base (1) is connected to the upper base (2) in a fluid-tight manner.

6. The tuning fork measuring meter according to claim 4 or 5, characterized in that: The upper base (2) has a second upper side surface (21) and a second lower side surface (22) which are arranged axially opposite to each other, wherein the lower base (1) is connected to the upper base (2) in such a way that the first upper side surface (11) abuts against the second lower side surface (22).

7. The tuning fork measuring meter according to claim 6, characterized in that: The lower base (1) is connected to the upper base (2) by means of at least two fastening screws (3), wherein corresponding threaded holes and through holes are provided in the upper base (2) and the lower base (1) to allow the at least two fastening screws (3) to pass through the through holes in the lower base (1) from the axial bottom of the first lower side surface (12) and be screwed into the threaded holes of the upper base (2).

8. The tuning fork measuring meter according to claim 2, characterized in that: The tuning fork type meter is constructed to further include a signal input component (4), a signal output component (5) and a limit component (6) for preventing the signal input component (4) and the signal output component (5) from shifting relative to the tuning fork type meter, wherein the axial length of the lower blind hole is designed to at least allow the lower end functional area (42) of the signal input component and the lower end functional area (52) of the signal output component to be accommodated therein.

9. A measuring device, characterized in that: It comprises a tuning fork meter according to any one of claims 1 to 8.

Images