Compact Coriolis mass flowmeter

Abstract

The utility model discloses a compact Coriolis mass flow meter which comprises a flow sensor and a flow transmitter. The flow sensor comprises a sensor shell and a sensor assembly, and the sensor assembly is arranged in the sensor shell. The sensor housing is provided with an opening. The flow transmitter comprises a transmitter shell and a circuit board assembly, and the circuit board assembly is arranged in the transmitter shell. At least part of the transmitter shell is inserted into the containing cavity of the sensor shell through the opening, and the circuit board assembly and the sensor assembly are separated through the transmitter shell. And the transmitter shell is fixedly connected with the sensor shell and seals the opening. Compared with the prior art, the compact Coriolis mass flowmeter has the advantages that the overall compactness can be improved, the circuit board assembly is convenient to mount and dismount, and the influence of high temperature on the circuit board assembly during welding of the sensor shell is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of Coriolis mass flowmeters, in particular to a compact Coriolis mass flowmeter. Background Art

[0002] In recent years, with the advantages of high precision and high reliability, Coriolis mass flowmeters have been increasingly widely used in quantitative filling and batching processes.

[0003] In the prior art, a Coriolis mass flowmeter generally includes a flow sensor and a flow transmitter, wherein the flow sensor includes a sensor housing, a sensor assembly and a flange. The sensor assembly is disposed in the sensor housing, and a flange is connected to each end of the sensor housing. The flow transmitter includes a transmitter housing and a circuit board assembly, and the circuit board assembly is disposed in the transmitter housing. The sensor assembly and the circuit board assembly are connected via a signal line, so that the flow signal measured by the sensor assembly is processed and calculated, and a standard current and pulse are output. Since the sensor housing and the transmitter housing are disposed separately, the overall volume and weight of the Coriolis mass flowmeter are relatively large.

[0004] In order to reduce the size of the Coriolis mass flowmeter, some solutions place the circuit board assembly inside the sensor housing. The disadvantage of this solution is that the circuit board assembly lacks protection and is easily affected by the high temperature during welding of the sensor housing. In addition, when the circuit board assembly needs to be repaired, the entire sensor housing needs to be disassembled as a whole, which makes maintenance inconvenient. Utility Model Content

[0005] The utility model aims to provide a compact Coriolis flowmeter to solve the problems existing in the above-mentioned prior art.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model discloses a compact Coriolis mass flowmeter, comprising:

[0008] A flow sensor, the flow sensor comprising a sensor housing and a sensor assembly, the sensor assembly being arranged in the sensor housing; an opening being arranged on the sensor housing;

[0009] A flow transmitter, the flow transmitter comprising a transmitter housing and a circuit board assembly, the circuit board assembly being arranged in the transmitter housing; at least a portion of the transmitter housing is inserted into the accommodating cavity of the sensor housing through the opening, the circuit board assembly and the sensor assembly are separated by the transmitter housing; the transmitter housing is fixedly connected to the sensor housing and closes the opening.

[0010] Preferably, the sensor housing includes a main housing and an intermediate connecting piece, and the sensor assembly is arranged in the main housing; the intermediate connecting piece is fixedly connected to the main housing, and a diverter is connected to each of the two ends of the intermediate connecting piece; the opening is arranged on a side of the intermediate connecting piece away from the main housing.

[0011] Preferably, the transmitter housing comprises a slot body and a cover body, the slot body is inserted into the opening, and the cover body covers the opening; the circuit board assembly is arranged between the slot body and the cover body, and the slot bottom of the slot body separates the circuit board assembly from the sensor assembly.

[0012] Preferably, the trough body is integrally connected to the intermediate connecting member, and the cover body can detachably cover the opening.

[0013] Preferably, a sealing ring is provided between the cover body and the intermediate connecting member.

[0014] Preferably, at least one end of the trough body along its length direction is opened, so that the trough body is an open trough body connected with the interior of the main shell.

[0015] Preferably, both ends of the trough body along its length direction are closed, so that the trough body and the cover body form a closed cavity.

[0016] Preferably, the trough body is provided with a first through hole, and the cover body is provided with a second through hole;

[0017] A connector is installed at the first through hole or a cable is passed through, and a connector is installed at the second through hole or a cable is passed through, so as to be electrically connected to the circuit board assembly through the connector or the cable;

[0018] The first through hole and the second through hole are both sealed so that the groove body and the cover body form a closed cavity.

[0019] Preferably, the cross-sectional shape of the trough body is circular or square.

[0020] Preferably, the circuit board assembly is mounted on the cover body, the intermediate connector or the slot body by means of fasteners.

[0021] Compared with the prior art, the utility model has achieved the following technical effects:

[0022] In the utility model, at least part of the transmitter housing is inserted into the accommodating cavity through the opening, thereby realizing the space utilization of the accommodating cavity inside the sensor housing and reducing the overall volume. The circuit board assembly and the sensor assembly are separated by the transmitter housing, so that the circuit board assembly is located near the opening, which can facilitate the installation and removal of the circuit board assembly on the one hand, and can reduce the influence of the high temperature on the circuit board assembly during the welding of the sensor housing on the other hand.

[0023] In the preferred embodiment of the utility model, the transmitter housing includes a slot body and a cover body. After the cover body is removed, the circuit board assembly can be easily installed or removed, thereby improving the convenience of installation and removal work.

[0024] In the preferred embodiment of the utility model, both ends of the trough body along its length direction are closed, so that the trough body and the cover body form a closed cavity, so that the cavity where the sensor component is located is isolated from the cavity where the circuit board component is located. During the installation or maintenance of the circuit board component, moisture or dirt is prevented from entering the cavity where the sensor component is located through the cavity where the circuit board component is located, thereby improving the stability of the working environment of the sensor component. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 is a schematic diagram of a compact Coriolis mass flowmeter in Example 1;

[0027] Figure 2 is a schematic diagram of the combined structure of the intermediate connecting member and the tank body in Example 1;

[0028] Figure 3 is a schematic diagram of a compact Coriolis mass flowmeter in Example 2;

[0029] Figure 4 is a schematic diagram of the combined structure of the intermediate connecting member and the tank body in Example 2;

[0030] Figure 5 is a schematic diagram of a compact Coriolis mass flowmeter in Example 3;

[0031] Figure 6 is a schematic diagram of the combined structure of the intermediate connecting member and the tank body in Example 4;

[0032] Figure 7 for Figure 6 A cross-sectional view of the combined structure of the middle connecting piece and the tank body;

[0033] Figure 8 Schematic diagram of the compact Coriolis mass flowmeter in Example 5.

[0034] In the figure: 10-compact Coriolis mass flowmeter; 101-tank body; 102-cover body; 103-circuit board assembly; 104-main housing; 105-intermediate connecting piece; 106-first screw; 107-second screw; 108-sealing gasket; 109-connecting plug; 101a-tank bottom; 101b-tank end; 101c-first through hole; second through hole 102a; A-accommodating cavity; B-enclosed cavity. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Reference Figures 1 to 8 , this embodiment provides a compact Coriolis mass flowmeter, including a flow sensor and a flow transmitter.

[0037] The flow sensor includes a sensor housing and a sensor assembly, and the sensor assembly is arranged in the sensor housing. The sensor housing is provided with an opening. The flow transmitter includes a transmitter housing and a circuit board assembly, and the circuit board assembly is arranged in the transmitter housing. At least part of the transmitter housing is inserted into the accommodating cavity of the sensor housing through the opening, and the circuit board assembly and the sensor assembly are separated by the transmitter housing. The transmitter housing is fixedly connected to the sensor housing and closes the opening.

[0038] The working principle of the compact Coriolis mass flowmeter in this embodiment is as follows:

[0039] In this embodiment, at least a portion of the transmitter housing is inserted into the accommodating cavity through the opening, thereby realizing space utilization of the accommodating cavity inside the sensor housing and reducing the overall volume.

[0040] The circuit board assembly and the sensor assembly are separated by the side wall of the transmitter housing, so that the circuit board assembly is located close to the opening. On the one hand, it can facilitate the installation and removal of the circuit board assembly, and on the other hand, it can reduce the impact of the high temperature during welding of the sensor housing on the circuit board assembly.

[0041] There are many specific forms of the sensor housing, and those skilled in the art can select one according to actual needs.

[0042] As a possible example, the sensor housing includes a main housing and an intermediate connecting piece, and the sensor assembly is arranged in the main housing. The intermediate connecting piece is fixedly connected to the main housing, and a diverter is connected to each of the two ends of the intermediate connecting piece. The opening is arranged on a side of the intermediate connecting piece away from the main housing.

[0043] Generally, the flow tube in the sensor assembly is in a curved shape that bulges outward toward the side away from the intermediate connector, and the main free area of ​​the accommodating cavity is located on the side close to the intermediate connector. Therefore, the opening on the intermediate connector is arranged on the side of the intermediate connector away from the main housing, so that the part of the transmitter housing inserted into the accommodating cavity is just located in the free area.

[0044] There are many specific forms of the transmitter housing, and those skilled in the art can choose according to actual needs. When the transmitter housing is composed of multiple parts that are detachably connected, it is convenient to repair and replace the internal circuit board assembly. When the transmitter housing is an integral structure that cannot be opened (for example, welded as a whole), the transmitter housing and the internal circuit board assembly can be replaced together.

[0045] As a possible example, the transmitter housing includes a slot body and a cover body, the slot body is inserted into the opening, and the cover body covers the opening. The circuit board assembly is arranged between the slot body and the cover body, and the slot bottom of the slot body separates the circuit board assembly from the sensor assembly. After the cover body is removed, the circuit board assembly can be easily installed or removed, thereby improving the convenience of installation and removal work. However, the actual implementation is not limited to this. For example, the slot body can be replaced by a tray, and the tray is fixed at the port of the cover body, so that only the cover body provides space for accommodating the circuit board assembly.

[0046] As a possible example, the trough body is integrally connected to the intermediate connecting member, and the cover body can be detachably covered on the opening. The installation method of the cover body here can be flexibly selected by those skilled in the art. For example, the cover body can be installed on the intermediate connecting member by fasteners, or can be hinged to the intermediate connecting member by hinges, as long as the cover body can cover the opening. However, the actual implementation is not limited to this. For example, the trough body can also be separated from the intermediate connecting member, and the trough body and the cover body are connected by fasteners.

[0047] As a possible example, a sealing ring is provided between the cover body and the intermediate connecting member to improve the sealing performance of the connection position between the cover body and the intermediate connecting member.

[0048] As a possible example, at least one end of the slot body along its length direction is opened, so that the slot body becomes an open slot body connected to the interior of the main housing. In this way, on the one hand, the material of the slot body can be saved, and on the other hand, the cables between the circuit board assembly and the sensor assembly can be conveniently passed through the opened position for easy wiring.

[0049] As a possible example, both ends of the trough body along its length direction are closed, so that the trough body and the cover body form a closed cavity. In this way, the cavity where the sensor assembly is located is isolated from the cavity where the circuit board assembly is located. During the installation or maintenance of the circuit board assembly, moisture or dirt is prevented from entering the cavity where the sensor assembly is located through the cavity where the circuit board assembly is located, thereby improving the stability of the working environment of the sensor assembly.

[0050] The circuit board assembly usually needs to connect input cables and output cables. The input cable is connected to the sensor assembly and is used to input information to the circuit board assembly. The output cable is used to connect to an external device and is used to output information to the external device. There are many ways to set the input cable and the output cable, and those skilled in the art can flexibly choose.

[0051] As a possible example, the tank body is provided with a first through hole, and the cover body is provided with a second through hole. The input cable passes through the first through hole and is connected to the circuit board assembly; or, the input cable is connected to the input connector fixed at the first through hole, and the input connector is connected to the circuit board assembly. The output cable passes through the second through hole and is connected to the circuit board assembly; or, the output cable is connected to the output connector fixed at the second through hole, and the output connector is connected to the circuit board assembly.

[0052] Regardless of which connection method is used for the input cable and the output cable, the first through hole and the second through hole are preferably sealed so that the tank body and the cover body form a closed cavity. The sealing method here can be glue sealing or other sealing methods such as sealing with a sealing ring. At this time, the tank body is surrounded by the bottom of the tank and the two ends of the tank to form a semi-closed structure.

[0053] As a possible example, the cross-sectional shape of the tank body (referring to the inner side profile of the tank body cross section) is circular or square. According to different actual needs, those skilled in the art may also select other shapes, such as trapezoidal, triangular, etc.

[0054] As a possible example, the circuit board assembly is mounted on the cover body, the intermediate connector or the slot body by means of fasteners, so that the circuit board assembly can be disassembled and replaced when necessary.

[0055] The compact Coriolis mass flowmeter of this embodiment is described below with reference to specific examples.

[0056] Example 1

[0057] Reference Figure 1 , Figure 2, this example provides a compact Coriolis mass flowmeter 10. Among them, the sensor housing includes a main housing 104 and an intermediate connector 105, the sensor assembly is arranged in the main housing 104, and the opening is arranged on the side of the intermediate connector 105 away from the main housing 104. The intermediate connector 105 is fixedly connected to the main housing 104, and a diverter is connected to each of the two ends of the intermediate connector 105. The transmitter housing includes a slot body 101 and a cover body 102. The two ends of the slot body 101 along its own length direction are opened, so that the slot body 101 becomes an open slot body connected to the inside of the main housing 104. The slot body 101 is integrally connected to the intermediate connector 105, and the cross-sectional shape of the slot body 101 is circular. The circuit board assembly 103 is fixed to the cover body 102 by a first screw 106, and the cover body 102 is fixed to the intermediate connector 105 by a second screw 107. A sealing ring 108 is arranged between the cover body 102 and the intermediate connector 105.

[0058] Example 2

[0059] Reference Figure 3 , Figure 4 This example provides a compact Coriolis mass flowmeter 10, which has a substantially similar structure to the compact Coriolis mass flowmeter provided in Example 1, except that:

[0060] The cross-section of the tank body 101 is square, and the circuit board assembly 103 is fixed to the middle connecting member 105 by means of a first screw 106 .

[0061] Example 3

[0062] Reference Figure 5 This example provides a compact Coriolis mass flowmeter 10, which has a substantially similar structure to the compact Coriolis mass flowmeter 10 provided in Example 2, except that:

[0063] The two ends of the trough body 101 along its own length direction are closed, so that the trough body 101 and the cover body 102 form a closed cavity B. The trough body 101 is provided with a first through hole 101c, and the cover body 102 is provided with a second through hole 102a. The first through hole 101c is for the input cable to pass through, and is sealed by glue sealing. The connector 109 is fixed at the second through hole 102a and sealed with a sealing gasket. One end of the input cable is connected to the sensor assembly in the accommodating cavity A, and the other end of the input cable is connected to the circuit board assembly 103 in the closed cavity B. One end of the connector 109 is connected to the circuit board assembly 103 in the closed cavity B, and the other end of the connector 109 is used to connect to an external device.

[0064] Example 4

[0065] Reference Figure 6 , Figure 7This example provides a compact Coriolis mass flowmeter, which has a substantially similar structure to the compact Coriolis mass flowmeter 10 provided in Example 1, except that:

[0066] The two ends of the trough body 101 along its length direction are closed, so that the trough body 101 and the cover body 102 form a closed cavity. The trough body 101 includes a trough bottom 101a and two trough ends 101b. The trough bottom 101a is provided with a first through hole 101c, and the first through hole 101c is used for the input cable to pass through and is sealed by glue.

[0067] Example 5

[0068] Reference Figure 8 This example provides a compact Coriolis mass flowmeter, which has a substantially similar structure to the compact Coriolis mass flowmeter 10 provided in Example 3, except that:

[0069] The tank body 101 and the intermediate connecting piece are not an integrated structure. The tank body 101 and the cover body 102 are fixedly connected by fasteners to obtain a transmitter housing.

[0070] The present invention uses specific examples to illustrate the principle and implementation of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A compact Coriolis mass flowmeter, characterized in that: include: A flow sensor, the flow sensor comprising a sensor housing and a sensor assembly, the sensor assembly being arranged in the sensor housing; an opening being arranged on the sensor housing; A flow transmitter, the flow transmitter comprising a transmitter housing and a circuit board assembly, the circuit board assembly being disposed in the transmitter housing; at least a portion of the transmitter housing being inserted into the accommodating cavity of the sensor housing through the opening, the circuit board assembly being spaced apart from the sensor assembly by the transmitter housing; The transmitter housing is fixedly connected to the sensor housing and closes the opening.

2. The compact Coriolis mass flowmeter according to claim 1, characterized in that: The sensor housing includes a main housing and an intermediate connecting piece, and the sensor assembly is arranged in the main housing; the intermediate connecting piece is fixedly connected to the main housing, and a diverter is connected to each of the two ends of the intermediate connecting piece; the opening is arranged on a side of the intermediate connecting piece away from the main housing.

3. The compact Coriolis mass flowmeter according to claim 2, characterized in that: The transmitter housing comprises a slot body and a cover body, wherein the slot body is inserted into the opening and the cover body covers the opening; the circuit board assembly is arranged between the slot body and the cover body, and the slot bottom of the slot body separates the circuit board assembly from the sensor assembly.

4. The compact Coriolis mass flowmeter according to claim 3, characterized in that: The trough body is integrally connected to the intermediate connecting piece, and the cover body can detachably cover the opening.

5. The compact Coriolis mass flowmeter according to claim 3 or 4, characterized in that: A sealing ring is arranged between the cover body and the intermediate connecting member.

6. The compact Coriolis mass flowmeter according to claim 3 or 4, characterized in that: At least one end of the slot body along its length direction is opened, so that the slot body is an open slot body connected with the interior of the main shell.

7. The compact Coriolis mass flowmeter according to claim 3 or 4, characterized in that: The two ends of the trough body along its length direction are closed, so that the trough body and the cover body form a closed cavity.

8. The compact Coriolis mass flowmeter according to claim 7, characterized in that: The trough body is provided with a first through hole, and the cover body is provided with a second through hole; A connector is installed at the first through hole or a cable is passed through, and a connector is installed at the second through hole or a cable is passed through, so as to be electrically connected to the circuit board assembly through the connector or the cable; The first through hole and the second through hole are both sealed so that the groove body and the cover body form a closed cavity.

9. The compact Coriolis mass flowmeter according to claim 3 or 4, characterized in that: The cross-sectional shape of the tank body is circular or square.

10. The compact Coriolis mass flowmeter according to claim 3 or 4, characterized in that: The circuit board assembly is mounted on the cover body, the intermediate connector or the slot body through fasteners.

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