Split type electromagnetic flowmeter device

Abstract

The utility model provides a split type electromagnetic flowmeter device which comprises a body composed of a flow guide pipe, a connecting shaft and a transmitter, a signal cable and a power cable are arranged between the transmitter and a sub-meter, the transmitter is provided with a shell, and the shell is provided with a power cable. The shell is provided with a signal line pipe and a power line pipe which are used for placing the signal cable and the power cable respectively, and a shielding layer is arranged in the signal line pipe. According to the utility model, the structure is compact, the signal cable and the power cable are respectively arranged in the signal line pipe and the power line pipe, the interference or attenuation of the power cable to signal transmission is reduced, the shielding layer is arranged in the signal line pipe, the cable is controlled to stably transmit signals, external interference is prevented, and the signal transmission quality is improved; and the problem of unstable work or inaccurate metering of the flow meter is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic flowmeters, in particular to a split-type electromagnetic flowmeter device. Background Technique

[0002] The electromagnetic flowmeter is a new type of flow measurement instrument that developed rapidly in the 1950s and 1960s with the development of electronic technology. The electromagnetic flowmeter applies the principle of electromagnetic induction and measures the flow rate of conductive fluids by the electromotive force induced when the conductive fluid passes through an externally applied magnetic field.

[0003] The split-type electromagnetic flowmeter is the most commonly used form of electromagnetic flowmeters, and the split-type electromagnetic flowmeter is mainly used to measure the volume flow rate of conductive liquids and slurries in closed pipelines.

[0004] The existing conventional operation is to connect the sensor to the pipeline, and the sub-meter is installed in the instrument room or near the sensor that is easily accessible to people, dozens to hundreds of meters apart.

[0005] The existing patent (publication number: CN210375245U) a split-type electromagnetic flowmeter, including a housing (12), a converter (1) and a junction box (6), the converter (1) is connected in series with the junction box (6) through a cable (2), and the cable (2) passes through the through hole of the rubber sleeve (18) and then connects to the interface end of the junction box (6). Cables are often used for power supply and signal transmission. However, as a signal transmission channel, the cable will interfere with or attenuate the signal during transmission, thereby affecting the signal transmission quality, resulting in unstable operation or inaccurate measurement of the flowmeter. The longer the cable length, the more interference and attenuation the signal will suffer during transmission. Content of the Utility Model

[0006] The purpose of the utility model is to provide a split-type electromagnetic flowmeter device to solve the above technical problems.

[0007] The utility model provides a split-type electromagnetic flowmeter device, including a main body composed of a diversion pipe, a connecting shaft and a transmitter. A signal cable and a power cable are arranged between the transmitter and the sub-meter. The transmitter is provided with a housing, and a signal wire pipe and a power wire pipe for respectively placing the signal cable and the power cable are installed on the housing, and a shielding layer is arranged in the signal wire pipe.

[0008] Further, the signal wire pipe is sequentially provided with a metal braided mesh layer, a waterproof layer, a fireproof cotton layer and the shielding layer from outside to inside, and an anti-oxidation coating layer is arranged outside the metal braided mesh layer.

[0009] Further, the outer shell is composed of a first shell and a second shell which are relatively spliced. Connecting columns and connecting holes are respectively arranged on the opposite surfaces of the first shell and the second shell. The connecting columns and the connecting holes are arranged correspondingly. Sealing gaskets are arranged on the opposite surfaces of the first shell and the second shell. An observation window is arranged on the second shell.

[0010] Further, a first semi-circular groove and a second semi-circular groove are formed on the surface of the first shell close to the second shell. A third semi-circular groove and a fourth semi-circular groove are formed on the surface of the second shell close to the first shell. The first semi-circular groove and the third semi-circular groove are spliced to form a first wire passing hole. The second semi-circular groove and the fourth semi-circular groove are spliced to form a second wire passing hole. The signal wire tube is arranged in the first wire passing hole. The power wire tube is arranged in the second wire passing hole.

[0011] Further, a wire tube sealing assembly is arranged at the position of the outer shell close to the signal cable and the power cable. A rubber gasket is arranged between the connecting shaft and the outer shell.

[0012] Further, the wire tube sealing assembly includes a first fixing block installed on the first shell and a second fixing block installed on the second shell. An inserting mechanism is arranged between the first fixing block and the second fixing block. A third wire passing hole and a fourth wire passing hole are formed in the combined block formed by splicing the first fixing block and the second fixing block. Tooth-shaped grooves are respectively formed in the third wire passing hole and the fourth wire passing hole. The signal wire tube is arranged in the third wire passing hole. The power wire tube is arranged in the fourth wire passing hole. Tooth-shaped pieces which are tightly matched with the tooth-shaped grooves are arranged on the outsides of the signal wire tube and the power wire tube.

[0013] Further, the inserting mechanism includes an inserting column and an inserting hole. The inserting column is installed on the surface of the first fixing block close to the second fixing block. The inserting hole is formed in the surface of the second fixing block close to the first fixing block. A round hole is formed in the inserting column. A telescopic column is installed on the side of the second fixing block. The inner end of the telescopic column is inserted into the round hole.

[0014] Further, the outer end of the telescopic column extends to the outside of the second fixing block. A placement groove is formed in the second fixing block. The telescopic column penetrates through the placement groove and extends into the inserting hole. A return spring is sleeved on the outside of the telescopic column located in the placement groove. A retaining ring is installed on the outer wall of the telescopic column close to the inner end of the telescopic column.

[0015] Further, a sealing hole is formed in the bottom surface of the shell. A sealing groove which is tightly matched with the rubber gasket is formed in the sealing hole.

[0016] Furthermore, a detachable moisture absorbent sheet is provided inside the outer shell.

[0017] The utility model has a compact structure. By placing the signal cable and the power cable in the signal line pipe and the power line pipe respectively, the interference or attenuation of the power cable to signal transmission is reduced. By arranging a shielding layer inside the signal line pipe, the control cable can stably transmit signals, prevent being interfered by the outside world, improve the transmission quality of the signals, and avoid the problems of unstable operation or inaccurate measurement of the flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required to be used in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Structural schematic diagram of Embodiment 1 of the utility model;

[0020] Figure 2 Structural diagram of the signal line pipe of Embodiment 1 of the utility model;

[0021] Figure 3 Structural schematic diagram of the first housing of Embodiment 1 of the utility model;

[0022] Figure 4 Structural schematic diagram of the second housing of Embodiment 1 of the utility model;

[0023] Figure 5 Structural schematic diagram of the line pipe sealing assembly of Embodiment 1 of the utility model;

[0024] Figure 6 Top view sectional view of the plugging mechanism of Embodiment 1 of the utility model;

[0025] Figure 7 Structural schematic diagram of the first housing of Embodiment 2 of the utility model;

[0026] Description of the reference numerals:

[0027] In the figure: 11 - diversion pipe, 12 - connecting shaft, 13 - sub - meter, 2 - housing, 21 - first housing, 211 - connecting post, 22 - second housing, 221 - connecting hole, 23 - first fixing block, 24 - second fixing block, 25 - third wire - passing hole, 26 - fourth wire - passing hole, 27 - tooth - shaped groove, 28 - tooth - shaped piece, 29 - observation window, 31 - first semi - circular groove, 32 - second semi - circular groove, 33 - third semi - circular groove, 34 - fourth semi - circular groove, 35 - sealing hole, 36 - sealing groove, 37 - rubber gasket, 38 - sealing cushion layer, 41 - plugging post, 42 - plugging hole, 43 - round hole, 44 - telescopic post, 45 - placement groove, 46 - reset spring, 47 - retaining ring, 48 - pull ring, 5 - moisture - absorbing sheet, 61 - installation groove, 62 - installation plate, 63 - bolt, 64 - placement bin, 65 - communication groove, 66 - lifting spring, 71 - signal cable, 72 - signal wire pipe, 73 - power wire pipe, 74 - telescopic pipe, 8 - warning lamp, 91 - anti - oxidation coating layer, 92 - metal braided mesh layer, 93 - waterproof layer, 94 - fire - proof cotton layer, 95 - shielding layer; Detailed implementation manners

[0028] The technical solutions of the present utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0029] In the description of the present utility model, 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", etc. are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present 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 thus should not be construed as a limitation to the present utility model.

[0030] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the said features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless otherwise specifically defined. In addition, the terms "installed", "connected", and "joined" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0031] Embodiment 1

[0032] As Figures 1-6 shown:

[0033] A split electromagnetic flowmeter device includes a main body composed of a flow guide pipe 11, a connecting shaft 12, and a transmitter. A signal cable 71 and a power cable are arranged between the transmitter and a sub-meter 13.

[0034] A housing 2 is sleeved outside the transmitter. A top cover is installed on the top of the housing 2, and the top cover is connected to the housing 2 by detachable means such as magnetic attraction and detachable bolts.

[0035] A signal wire pipe 72 and a power wire pipe 73 are installed on the housing 2. The signal cable 71 is arranged in the signal wire pipe 72, and the power cable is arranged in the power wire pipe 73.

[0036] As Figure 2 shown, the signal wire pipe 72 is sequentially provided with a metal braided mesh layer 92, a waterproof layer 93, a fireproof cotton layer 94, and a shielding layer 95 from outside to inside. An anti-oxidation coating layer 91 is provided outside the metal braided mesh layer 92.

[0037] In this embodiment, the metal braided mesh layer 92 is in a braided mesh shape made of red copper or tinned copper. The waterproof layer 93 is made of polyethylene material. The shielding layer 95 is made of carbon fiber material. The anti-oxidation coating layer 91 is made of chloroprene rubber coating.

[0038] The external wiring terminal of the signal cable 71 is connected to the outer port of the signal wire pipe 72 by plastic sealing means to prevent outside moisture or water from entering.

[0039] The arrangement of the signal wire pipe 72 can protect the data signal from the power cable or other interferences, ensure the accurate, high-speed, and reliable transmission of data, and thus improve the communication transmission quality and efficiency.

[0040] As Figure 1 ,Figure 3 and Figure 4 As shown in Figure 4 , the housing 2 is composed of a first housing 21 and a second housing 22 which are relatively spliced. Connecting columns 211 and connecting holes 221 are respectively arranged on the opposite surfaces of the first housing 21 and the second housing 22. The connecting columns 211 and the connecting holes 221 are correspondingly arranged, and a sealing cushion layer 38 is arranged on the opposite surfaces of the first housing 21 and the second housing 22.

[0041] An observation window 29 is arranged on the second housing 22 to facilitate the observation of the transmitter.

[0042] A detachable moisture absorption sheet 5 is arranged inside the housing 2. The moisture absorption sheet 5 is detachably installed at the bottom of the mounting plate 62, and a bolt 63 is rotatably installed on the mounting plate 62.

[0043] Mounting grooves 61 are opened on the top surfaces of the first housing 21 and the second housing 22. Threaded holes corresponding to the bolts 63 are opened in the mounting grooves 61. A placement bin 64 extending to the inside of the side wall of the first housing 21 or the second housing 22 is opened on the bottom surface of the mounting groove 61, and a communication groove 65 communicating with the placement bin 64 is opened on the inner side wall of the first housing 21 or the second housing 22.

[0044] The mounting plate 62 is arranged in the mounting groove 61. The bolt 63 is threadedly connected with the threaded hole. The moisture absorption sheet 5 is arranged in the placement bin 64, and the moisture absorption sheet 5 sucks out the humid air around the transmitter in the housing 2 through the communication groove 65.

[0045] The detachable setting of the moisture absorption sheet 5 facilitates the operator to replace the moisture absorption sheet 5 and ensures that the surrounding of the transmitter remains dry.

[0046] Furthermore, it avoids the influence of the humid environment on the wiring part of the transmitter, resulting in problems such as reduced conductive and data transmission performance, signal attenuation, cable aging and decreased communication quality, and prevents the wiring part from being corroded by moisture, thus affecting the normal operation of the entire device.

[0047] A first semi-circular groove 31 and a second semi-circular groove 32 are opened on the surface of the first housing 21 close to the second housing 22. A third semi-circular groove 33 and a fourth semi-circular groove 34 are opened on the surface of the second housing 22 close to the first housing 21. The first semi-circular groove 31 and the third semi-circular groove 33 are spliced to form a first wire passing hole, and the second semi-circular groove 32 and the fourth semi-circular groove 34 are spliced to form a second wire passing hole. The signal wire pipe 72 is arranged in the first wire passing hole, and the power supply wire pipe 73 is arranged in the second wire passing hole.

[0048] As Figure 1 、 Figure 5 and Figure 6 shown, a wire pipe sealing assembly is arranged at the position of the housing 2 close to the signal cable 71 and the power cable, and a rubber gasket 37 is arranged between the connecting shaft 12 and the housing 2.

[0049] The wire tube sealing assembly includes a first fixing block 23 installed on the first housing 21 and a second fixing block 24 installed on the second housing 22. An insertion mechanism is provided between the first fixing block 23 and the second fixing block 24. A third wire passing hole 25 and a fourth wire passing hole 26 are formed in the combined block composed of the first fixing block 23 and the second fixing block 24, and tooth-shaped grooves 27 are respectively formed in the third wire passing hole 25 and the fourth wire passing hole 26.

[0050] The signal wire tube 72 is arranged in the third wire passing hole 25, the power supply wire tube 73 is arranged in the fourth wire passing hole 26, and tooth-shaped pieces 28 which are closely matched with the tooth-shaped grooves 27 are arranged on the outer parts of the signal wire tube 72 and the power supply wire tube 73.

[0051] The insertion mechanism includes an insertion post 41 and an insertion hole 42. The insertion post 41 is installed on the surface of the first fixing block 23 close to the second fixing block 24, the insertion hole 42 is formed in the surface of the second fixing block 24 close to the first fixing block 23, a round hole 43 is formed in the insertion post 41, a telescopic column 44 is installed on the side part of the second fixing block 24, and the inner end part of the telescopic column 44 is inserted into the round hole 43.

[0052] The outer end part of the telescopic column 44 extends to the outside of the second fixing block 24. A placement groove 45 is formed in the second fixing block 24. The telescopic column 44 penetrates through the placement groove 45 and extends into the insertion hole 42. A return spring 46 is sleeved on the outer part of the telescopic column 44 located in the placement groove 45, and a retaining ring 47 is installed on the outer wall of the telescopic column 44 close to the inner end part of the telescopic column 44 of the return spring 46.

[0053] When the first housing 21 and the second housing 22 are spliced and combined, it is necessary to insert the first fixing block 23 and the second fixing block 24. The insertion post 41 enters the insertion hole 42. Under the action of the return spring 46, the inner end part of the telescopic rod is located in the insertion hole 42. The inner end part of the insertion post 41 is a bevel surface, and the inner end part of the telescopic rod is also a bevel surface. When the inner end part of the insertion post 41 contacts the inner end part of the telescopic rod, the insertion post 41 pushes the telescopic rod to move outwards until the inner end part of the telescopic rod slides into the round hole 43 which is arranged in cooperation with it.

[0054] When the first housing 21 and the second housing 22 are separated, the telescopic column 44 is pulled outwards by pulling the pull ring 48 by hand, the return spring 46 is compressed, and the first fixing block 23 and the second fixing block 24 are manually separated.

[0055] One side of the first housing 21 and the second housing 22 is connected by the insertion mechanism, and the other side can also be connected by the same insertion mechanism, and hinge connection, magnetic attraction connection, threaded connection or other detachable connection methods can also be selected.

[0056] A sealing hole 35 is formed in the bottom surface of the housing, and a sealing groove 36 which is closely matched with the rubber gasket 37 is formed in the sealing hole 35.

[0057] In this embodiment, the sealing degree inside the housing 2 is improved through the line pipe sealing assembly and the sealing measures at the connection, the oxidation degree of the components inside the housing 2 is reduced, the entry of external moisture and water into the interior is avoided, which affects the normal operation of the equipment, and a stable environment inside the housing 2 is ensured.

[0058] A warning light 8 is arranged on the outer wall of the first housing 21, and a humidity sensor is arranged inside the housing 2 near the transmitter wiring. The humidity sensor is electrically connected to the warning light 8. By monitoring the humidity inside the housing 2, the staff can be reminded in time to replace the moisture absorption sheet 5, avoiding the influence of the humid environment on the wiring of the transmitter, resulting in problems such as reduced electrical conductivity and data transmission performance, signal attenuation, cable aging, and decreased communication quality, and preventing the wiring from being corroded by moisture, thus affecting the normal operation of the entire equipment.

[0059] In this embodiment, a telescopic pipe 74 can also be arranged on the power supply line pipe 73, and the power cable is accommodated in the power supply line pipe 73. The wiring distance can be increased through the telescopic pipe 74.

[0060] Embodiment 2

[0061] As Figure 7 shown, a jacking spring 66 is sleeved outside the bolt 63 rotatably installed on the mounting plate 62. The top of the jacking spring 66 is connected to the bottom surface of the mounting plate 62, and a groove for preventing the jacking spring 66 is opened on the bottom surface of the mounting groove 61. When installing the moisture absorption sheet 5, by screwing the bolt 63, the mounting plate 62 enters the mounting groove 61, and the jacking spring 66 is compressed in the groove; when replacing the moisture absorption sheet 5, unscrew the bolt 63, and the jacking spring 66 jacks up the mounting plate 62 to achieve quick replacement. In addition, other technical solutions are the same as those in Embodiment 1 and will not be elaborated here.

[0062] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention 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 recorded 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 invention.

Claims

1. A split electromagnetic flowmeter device, characterized in that: It includes a main body composed of a diversion pipe, a connecting shaft and a transmitter. A signal cable and a power cable are arranged between the transmitter and the sub-meter. A housing is provided on the transmitter. A signal wire pipe and a power wire pipe for respectively placing the signal cable and the power cable are installed on the housing. A shielding layer is arranged in the signal wire pipe.

2. The split electromagnetic flowmeter device according to claim 1, characterized in that: The signal wire pipe is sequentially provided with a metal braided mesh layer, a waterproof layer, a fireproof cotton layer and the shielding layer from outside to inside. An anti-oxidation coating layer is provided outside the metal braided mesh layer.

3. The split electromagnetic flowmeter device according to claim 1, characterized in that: The housing consists of a first shell and a second shell which are spliced relatively. Connecting columns and connecting holes are respectively arranged on the opposite surfaces of the first shell and the second shell. The connecting columns and the connecting holes are arranged correspondingly. A sealing cushion layer is provided on the opposite surfaces of the first shell and the second shell. An observation window is provided on the second shell.

4. The split electromagnetic flowmeter device according to claim 3, wherein: A first semi-circular groove and a second semi-circular groove are formed on the surface of the first shell close to the second shell. A third semi-circular groove and a fourth semi-circular groove are formed on the surface of the second shell close to the first shell. The first semi-circular groove and the third semi-circular groove are spliced to form a first wire passing hole. The second semi-circular groove and the fourth semi-circular groove are spliced to form a second wire passing hole. The signal wire pipe is arranged in the first wire passing hole. The power wire pipe is arranged in the second wire passing hole.

5. The split electromagnetic flowmeter device according to claim 3, characterized in that: A wire pipe sealing assembly is arranged at the position of the housing close to the signal cable and the power cable. A rubber gasket is arranged between the connecting shaft and the housing.

6. The split electromagnetic flowmeter device according to claim 5, characterized in that: The wire pipe sealing assembly includes a first fixing block installed on the first shell and a second fixing block installed on the second shell. An insertion mechanism is arranged between the first fixing block and the second fixing block. A third wire passing hole and a fourth wire passing hole are formed on the combined block formed by splicing the first fixing block and the second fixing block. Tooth-shaped grooves are respectively formed in the third wire passing hole and the fourth wire passing hole. The signal wire pipe is arranged in the third wire passing hole. The power wire pipe is arranged in the fourth wire passing hole. Tooth-shaped pieces which are closely matched with the tooth-shaped grooves are arranged outside the signal wire pipe and the power wire pipe.

7. The split electromagnetic flowmeter device according to claim 6, characterized in that: The insertion mechanism includes an insertion column and an insertion hole. The insertion column is installed on the surface of the first fixing block close to the second fixing block. The insertion hole is formed on the surface of the second fixing block close to the first fixing block. A round hole is formed in the insertion column. A telescopic column is installed on the side part of the second fixing block. The inner end part of the telescopic column is inserted into the round hole.

8. The split electromagnetic flowmeter device according to claim 7, wherein: The outer end part of the telescopic column extends outside the second fixing block. A placement groove is formed in the second fixing block. The telescopic column penetrates through the placement groove and extends into the insertion hole. A return spring is sleeved outside the telescopic column located in the placement groove. A retaining ring is installed on the outer wall of the telescopic column close to the inner end part of the telescopic column.

9. The split electromagnetic flowmeter device according to claim 5, wherein: An airtight hole is formed on the bottom surface of the shell. An airtight groove which is closely matched with the rubber gasket is formed in the airtight hole.

10. The split electromagnetic flowmeter device according to claim 1, wherein: Detachable moisture absorption sheets are arranged inside the housing.

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