A fluid metering device

Abstract

The embodiment of the present invention discloses a fluid metering device, which relates to the field of flow detection technology and can adapt to fluid delivery pipelines with two flow directions. The device includes a shell, and a first joint and a second joint connected to the inside of the shell are arranged on the outer wall of the shell, and a first group of mounting positions, a second group of mounting positions and a flow meter assembly are arranged in the shell, and the flow meter assembly has a first group of matching parts, and the first group of matching parts can match the first group of mounting positions and the second group of mounting positions respectively; wherein, the flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the first joint; or the flow meter assembly is installed on the second group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the second joint. The present invention is suitable for continuous or intermittent measurement of flow in a pipeline.

Description

Technical Field

[0001] The present invention relates to the technical field of flow detection, and in particular to a fluid metering device. Background Art

[0002] Flow meters are used to continuously or intermittently measure the flow in a pipeline. The flow direction of existing flow meters is generally fixed in one direction, but the direction of the user's pipeline is different. If the flow direction of the pipeline is reversed, the flow meter needs to be installed in reverse. However, due to the different sizes of the front and back of the flow meter, interference and other problems may occur during reverse installation, making the flow meter unable to be installed and used in reverse. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a fluid metering device that can adapt to fluid delivery pipelines with two flow directions.

[0004] A fluid metering device provided in an embodiment of the present invention comprises a shell, wherein a first joint and a second joint communicating with the interior of the shell are arranged on the outer wall of the shell, and a first group of mounting positions and a second group of mounting positions are arranged in the shell; a flow meter assembly is arranged in the shell, and a first group of matching parts are provided on the flow meter assembly, and the first group of matching parts can match with the first group of mounting positions and the second group of mounting positions respectively; wherein the flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the first joint; or the flow meter assembly is installed on the second group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the second joint.

[0005] Optionally, a control valve assembly is further provided in the shell, and the control valve assembly has a second set of mating parts, and the second set of mating parts can match the first set of mounting positions and the second set of mounting positions respectively; when the flow meter assembly is installed on the first set of mounting positions, the control valve assembly is installed on the second set of mounting positions through the second set of mating parts, and the inlet end of the control valve in the control valve assembly is connected to the outlet end of the flow meter in the flow meter assembly, and the outlet end of the control valve in the control valve assembly is connected to the second joint; when the flow meter assembly is installed on the second set of mounting positions, the control valve assembly is installed on the first set of mounting positions through the second set of mating parts, and the inlet end of the control valve in the control valve assembly is connected to the outlet end of the flow meter in the flow meter assembly, and the outlet end of the control valve in the control valve assembly is connected to the first joint.

[0006] Optionally, the first group of mounting positions is arranged at a position inside the shell close to the first joint, and the second group of mounting positions is arranged at a position inside the shell close to the second joint; the first joint and the second joint are externally threaded joints, and are symmetrically arranged at the upper end of the shell with respect to the central axis of the shell; the first group of mounting positions and the second group of mounting positions are symmetrically arranged with respect to the central axis of the shell.

[0007] Optionally, the first group of mounting positions and the second group of mounting positions respectively include at least two mounting columns with mounting holes arranged on the inner wall of the shell, and each mounting column is a mounting position; the first group of mating parts includes a first group of mounting holes, and the first group of mounting holes is arranged corresponding to at least two mounting columns of the first group of mounting positions, and the second group of mating parts includes a second group of mounting holes, and the second group of mounting holes is arranged corresponding to at least two mounting columns of the second group of mounting positions; among the first group of mounting positions and the second group of mounting positions, at least one mounting position is a common mounting position.

[0008] Optionally, the first group of mounting positions and the second group of mounting positions respectively include at least one mounting column for mounting the flow meter assembly and at least one mounting column for mounting the control valve assembly; the height of the mounting column for mounting the control valve assembly is less than the height of the mounting column for mounting the flow meter assembly.

[0009] Optionally, the first group of mounting positions and the second group of mounting positions respectively include at least two mounting columns for installing the flow meter assembly; wherein at least one of the mounting columns for installing the flow meter assembly is arranged at a position close to the upper end of the shell, and at least one of the mounting columns for installing the flow meter assembly is arranged at a position close to the lower end of the shell; and the mounting column for installing the control valve assembly is arranged between at least two mounting columns for installing the flow meter assembly.

[0010] Optionally, a first group of clamp mounting positions and a second group of clamp mounting positions are also provided in the shell; the first group of clamp mounting positions includes two mounting columns with mounting holes arranged at the lower end of the first joint, and the two mounting columns are respectively arranged on both sides of the first joint; the second group of clamp mounting positions includes two mounting columns with mounting holes arranged at the lower end of the second joint, and the two mounting columns are respectively arranged on both sides of the second joint.

[0011] Optionally, the flow meter assembly includes a flow meter and a flow meter mounting frame, the flow meter is arranged on the flow meter mounting frame, and the first group of mating parts are opened on the flow meter mounting frame, wherein the flow meter is a rotary flow meter or a turbine flow meter; the control valve assembly includes a control valve and a control valve mounting frame, the control valve is arranged on the control valve mounting frame, and the second group of mating parts are opened on the control valve mounting frame.

[0012] Optionally, the shell includes a shell body and a cover body arranged on the shell body, the first joint and the second joint are arranged on the shell body, and the flow meter assembly and the control valve assembly are arranged in the shell body; the cover body is provided with a first sensor mounting hole and a second sensor mounting hole; wherein, when the flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, a flow sensor is installed in the first sensor mounting hole, and the flow sensor corresponds to the signal transmitting disk of the flow meter in the flow meter assembly, and a pressure sensor is installed in the second sensor mounting hole; when the flow meter assembly is installed on the second group of mounting positions through the first group of matching parts, a flow sensor is installed in the second sensor mounting hole, and the flow sensor corresponds to the signal transmitting disk of the flow meter in the flow meter assembly, and a pressure sensor is installed in the first sensor mounting hole.

[0013] Optionally, a sealing assembly is provided between the cover body and the shell body to form a sealed cavity between the cover body and the shell body; the outlet end of the flowmeter in the flowmeter assembly and the inlet end of the control valve in the control valve assembly are both opened in the sealed cavity.

[0014] Optionally, a controller is connected to the cover body, a card slot is provided on the cover body, a buckle is provided on the controller, and the controller is clamped in the card slot through the buckle; the flow sensor, the pressure sensor and the control valve are electrically connected to the controller respectively.

[0015] Optionally, the inlet end of the flowmeter in the flowmeter assembly is connected to the first joint via a first pipeline, the first pipeline is a bend, and the outlet end of the control valve in the control valve assembly is connected to the second joint via a second pipeline; or the inlet end of the flowmeter in the flowmeter assembly is connected to the second joint via a first pipeline, the first pipeline is a bend, and the outlet end of the control valve in the control valve assembly is connected to the first joint via a second pipeline.

[0016] A fluid metering device provided in an embodiment of the present invention comprises a shell, wherein a first joint and a second joint communicating with the interior of the shell are arranged on the outer wall of the shell, and a first group of mounting positions and a second group of mounting positions are arranged in the shell; a flow meter assembly is arranged in the shell, and a first group of matching parts are provided on the flow meter assembly, and the first group of matching parts can match with the first group of mounting positions and the second group of mounting positions respectively; wherein the flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the first joint; or the flow meter assembly is installed on the second group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the second joint. In this way, there are two installation methods between the flow meter assembly and the two interfaces on the shell. When the inlet end of the flow meter assembly is connected to the first joint, the fluid metering device supports the fluid to flow in from the first joint and flow out from the second joint; when the inlet end of the flow meter assembly is connected to the second joint, the fluid metering device supports the fluid to flow in from the second joint and flow out from the first joint. In this way, when the fluid metering device is connected in series to the fluid conveying pipeline, it is only necessary to reasonably set the installation method of the flow meter assembly and the two interfaces on the shell according to the flow direction of the fluid conveying pipeline, which can adapt to fluid conveying pipelines with two flow directions without the need to reversely install the entire fluid metering device, thereby avoiding the problem that the fluid metering device cannot be reversely installed and used due to the different sizes of the front and back of the fluid metering device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 An exploded schematic diagram of a first installation method of a fluid metering device provided by an embodiment of the present invention;

[0019] Figure 2 An exploded schematic diagram of a second installation method of a fluid metering device provided by an embodiment of the present invention;

[0020] Figure 3 is a front view of the shell body in an embodiment of the present invention;

[0021] Figure 4 is an axonometric view of the shell body in an embodiment of the present invention;

[0022] Figure 5A schematic diagram of the structure of a fluid metering device provided by an embodiment of the present invention with a cover plate removed;

[0023] Figure 6 A schematic structural diagram of a cover plate of a fluid metering device provided by an embodiment of the present invention;

[0024] Figure 7 Another exploded schematic diagram of a first installation method of a fluid metering device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Description of the drawings:

[0028] 1. Shell; 11. Shell body; 111. First group of mounting positions; 112. Second group of mounting positions; 113. First group of clamp mounting positions; 114. Second group of clamp mounting positions; 12. Cover body; 121. First sensor mounting hole; 122. Second sensor mounting hole; 13. Sealing assembly; 2. First joint; 3. Second joint; 4. Flow meter assembly; 41. Flow meter mounting bracket; 411. First group of matching parts; 42. Flow meter; 5. Control valve assembly; 51. Control valve mounting bracket; 511. Second group of matching parts; 52. Control valve; 6. Flow sensor; 7. Pressure sensor; 8. Controller; 9. First pipeline; 10. Second pipeline.

[0029] A fluid metering device provided in an embodiment of the present invention can adapt to fluid delivery pipelines with two flow directions.

[0030] like Figure 1 and Figure 2 As shown, a fluid metering device provided in this embodiment includes a housing 1, a first joint 2 and a second joint 3 connected to the interior of the housing 1 are arranged on the outer wall of the housing 1, and a first group of mounting positions 111 and a second group of mounting positions 112 are arranged in the housing 1 (see Figure 3); a flow meter assembly 4 is arranged in the shell 1, and the flow meter assembly 4 has a first set of mating parts, and the first set of mating parts can be matched with the first set of mounting positions 111 and the second set of mounting positions 112 respectively; wherein, the flow meter assembly 4 is installed on the first set of mounting positions 111 through the first set of mating parts, and the inlet end of the flow meter assembly 4 is connected to the first joint 2; or the flow meter assembly 4 is installed on the second set of mounting positions 112 through the first set of mating parts, and the inlet end of the flow meter assembly 4 is connected to the second joint 3.

[0031] In this embodiment, the flow meter assembly is connected in series to the fluid transmission pipeline through the first joint and the second joint, and is used to measure the flow passing through the flow meter assembly; optionally, the flow meter assembly may include a rotary flow meter or a turbine flow meter.

[0032] The fluid metering device provided in this embodiment has two installation methods between the flow meter assembly and the two interfaces on the shell. When the inlet end of the flow meter assembly is connected to the first joint, the fluid metering device supports the fluid to flow in from the first joint and flow out from the second joint; when the inlet end of the flow meter assembly is connected to the second joint, the fluid metering device supports the fluid to flow in from the second joint and flow out from the first joint. In this way, when the fluid metering device is connected in series to the fluid conveying pipeline, it is only necessary to reasonably set the installation method of the flow meter assembly and the two interfaces on the shell according to the flow direction of the fluid conveying pipeline, which can adapt to fluid conveying pipelines with two flow directions without the need to reversely install the entire fluid metering device, thereby avoiding the problem that the fluid metering device cannot be reversely installed and used due to the different sizes of the front and back of the fluid metering device.

[0033] like Figure 1 and Figure 2 As shown, optionally, a control valve assembly 5 is further provided in the housing 1, and the control valve assembly 5 has a second group of matching parts, and the second group of matching parts can be matched with the first group of installation positions 111 and the second group of installation positions 112 respectively (see Figure 3); when the flow meter assembly 4 is installed on the first group of mounting positions 111, the control valve assembly 5 is installed on the second group of mounting positions 112 through the second group of matching parts, and the inlet end of the control valve in the control valve assembly 5 is communicated with the outlet end of the flow meter in the flow meter assembly 4, and the outlet end of the control valve in the control valve assembly 5 is connected to the second joint 3; when the flow meter assembly 4 is installed on the second group of mounting positions 112, the control valve assembly 5 is installed on the first group of mounting positions 111 through the second group of matching parts, and the inlet end of the control valve in the control valve assembly 5 is communicated with the outlet end of the flow meter in the flow meter assembly 4, and the outlet end of the control valve in the control valve assembly 5 is connected to the first joint 2.

[0034] In this embodiment, the control valve in the control valve assembly is used to control the delivery of fluid. When the user uses gas / water normally, the control valve is in an open state. When the flow meter has abnormal conditions such as gas / liquid leakage or the user is in arrears, the control valve can be controlled to close immediately, thereby blocking the outflow of fluid and prohibiting the user from using gas / water normally. At this time, the flow meter assembly will also stop flow measurement due to the closed outlet.

[0035] The flow meter assembly and the control valve assembly can be installed on the first group of installation positions / the second group of installation positions, so that the flow meter assembly and the control valve assembly can be interchanged and replaced in installation position, realizing two installation modes in the housing, thereby adapting to two flow directions of fluid delivery pipelines. In addition, the control valve assembly and the flow meter assembly are arranged inside the housing at the same time, which can prevent illegal gas thieves from stealing gas by destroying the control valve, and also create a structure that integrates flow measurement, control and installation. The structure is compact in design, easy to install, improves installation efficiency, occupies little space, and reduces installation costs.

[0036] like Figure 3 As shown, optionally, the first group of mounting positions 111 is arranged at a position in the shell close to the first joint 2, and the second group of mounting positions 112 is arranged at a position in the shell close to the second joint 3; the first joint 2 and the second joint 3 are externally threaded joints, and are symmetrically arranged at the upper end of the shell 1 with respect to the central axis of the shell 1; the first group of mounting positions 111 and the second group of mounting positions 112 are symmetrically arranged with respect to the central axis of the shell.

[0037] In this embodiment, Figure 3 As shown, the first group of mounting positions 111 (mounting positions in the left dashed box) and the second group of mounting positions 112 (mounting positions in the right dashed box) can respectively include at least two mounting posts with mounting holes arranged on the inner wall of the housing 1 (see Figure 4), each mounting post is a mounting position.

[0038] When the fluid metering module is used for gas metering, the arrangement of the first joint and the second joint on the shell is the same as the arrangement of the air inlet and the air outlet of the current diaphragm gas meter, and the first joint and the second joint can be directly threadedly connected to the current gas delivery pipeline. In this way, the fluid metering device can be directly interchangeable with the diaphragm gas meter without the need to use special pipelines to connect to the fluid delivery pipeline, which greatly improves the installation efficiency; and the threaded connection structure between the fluid metering device and the fluid delivery pipeline can also reduce the installation space compared to the current flange connection structure.

[0039] In addition, since the components (flow meter assembly or control valve assembly) installed on the first group of mounting positions are always connected to the first joint, and the components (flow meter assembly or control valve assembly) installed on the second group of mounting positions are always connected to the second joint, therefore, setting the first group of mounting positions at a position close to the first joint and setting the second group of mounting positions at a position close to the second joint can facilitate the connection between the flow meter assembly and the control valve assembly and the interface, making the arrangement of the flow meter assembly and the control valve assembly in the housing more compact and orderly. Moreover, the first group of mounting positions and the second group of mounting positions are symmetrically arranged about the central axis of the housing, which can facilitate the interchange of the positions of the flow meter assembly and the control valve assembly.

[0040] like Figure 5 As shown, optionally, the flow meter assembly 4 includes a flow meter 42 and a flow meter mounting frame 41, the flow meter 42 is arranged on the flow meter mounting frame 41, and the first group of matching parts 411 is opened on the flow meter mounting frame 41, wherein the flow meter 42 is a lumbar flow meter or a turbine flow meter; the control valve assembly 5 includes a control valve 52 and a control valve mounting frame 51, the control valve 52 is arranged on the control valve mounting frame 51, and the second group of matching parts 511 ( Figure 5 The control valve mounting frame 51 is provided with a plurality of fasteners (the plurality of fasteners are hidden in the control valve mounting frame 51).

[0041] In this embodiment, the flow meter assembly includes not only a rotary flow meter or a turbine flow meter, but also a flow meter mounting frame, so that the first group of matching parts can be conveniently arranged on the flow meter mounting frame without affecting the flow metering work of the flow meter assembly, and the flow meter assembly is conveniently installed in the housing. Similarly, the control valve mounting frame in the control valve assembly has similar technical effects.

[0042] like Figure 5As shown, the first group of matching portions 411 includes a first group of mounting holes, which are arranged corresponding to at least two mounting posts of the first group of mounting positions 111, and the second group of matching portions 511 includes a second group of mounting holes (blocked by fasteners), which are arranged corresponding to at least two mounting posts of the second group of mounting positions 112; at least one of the first group of mounting positions 111 and the second group of mounting positions 112 is a common mounting position (the mounting positions in the left and right dashed boxes are common mounting positions, see Figure 3 ).

[0043] In this embodiment, the flow meter assembly can be fixed to the mounting columns on the first group of mounting positions by fasteners passing through the first group of mounting holes, and the connection between the control valve assembly and the second group of mounting positions is similar.

[0044] If the first group of mounting positions and the second group of mounting positions are set separately, each mounting position should be able to accommodate at least one fluid meter assembly, and the volume occupied by the two mounting positions should be at least equivalent to the volume of the two flow meter assemblies; and when there is a common mounting position between the first group of mounting positions and the second group of mounting positions (equivalent to the partial overlap of the areas occupied by the first group of mounting positions and the second group of mounting positions), when the flow meter assembly is installed on one of the mounting positions, even if the flow meter assembly also occupies part of the position of another mounting position, since the volume of the control valve assembly is generally smaller, the remaining space of the other mounting position is also sufficient to install the control valve assembly. In this way, the overall space occupied by the two mounting positions can be reduced, thereby making the arrangement between the flow meter assembly and the control valve assembly more compact, thereby reducing the overall volume of the fluid metering module.

[0045] like Figure 2 and Figure 3 As shown, optionally, the first group of mounting positions 111 and the second group of mounting positions 112 respectively include at least one mounting column for mounting the flow meter assembly 4 and at least one mounting column for mounting the control valve assembly 5; the height of the mounting column for mounting the control valve assembly 5 is less than the height of the mounting column for mounting the flow meter assembly 4.

[0046] In this embodiment, when the flow meter assembly is installed on the mounting column for mounting the flow meter assembly, due to the thickness of the flow meter assembly is relatively thick, interference may occur between the mounting column for mounting the control valve assembly. Therefore, the height of the mounting column for mounting the control valve assembly is made smaller than the height of the mounting column for mounting the flow meter assembly 4, so as to avoid such interference as much as possible.

[0047] like Figure 3 and Figure 4As shown, optionally, the first group of mounting positions 111 and the second group of mounting positions 112 respectively include at least two mounting posts for mounting the flow meter assembly 4; wherein at least one mounting post for mounting the flow meter assembly 4 is arranged at a position close to the upper end of the housing 1, and at least one mounting post for mounting the flow meter assembly 4 is arranged at a position close to the lower end of the housing 1; the mounting post for mounting the control valve assembly 5 is arranged between the at least two mounting posts for mounting the flow meter assembly 4 (see Figure 5 ).

[0048] In this embodiment, since the volume of the flowmeter assembly is generally larger than that of the control valve assembly, when designing two groups of mounting positions, for each group of mounting positions, the mounting columns for mounting the control valve assembly can be arranged between the mounting columns for mounting the flowmeter assembly according to the method of this embodiment. In this way, compared with the solution of arranging the mounting columns for mounting the control valve assembly outside the mounting columns for mounting the flowmeter assembly, the overall space occupied by each group of mounting positions can be saved, that is, when the control valve assembly and the flowmeter assembly are respectively installed on two groups of mounting positions, the arrangement between the control valve assembly and the flowmeter assembly can be made more compact.

[0049] like Figure 1 and Figure 2 As shown, optionally, the inlet end of the flowmeter in the flowmeter assembly 4 is connected to the first connector 2 through a first pipeline 9, the first pipeline 9 is a bent pipe, and the outlet end of the control valve in the control valve assembly 5 is connected to the second connector 3 through a second pipeline 10; or the inlet end of the flowmeter in the flowmeter assembly 4 is connected to the second connector 3 through a first pipeline 9, the first pipeline 9 is a bent pipe, and the outlet end of the control valve in the control valve assembly 5 is connected to the first connector 2 through a second pipeline 10.

[0050] In this embodiment, the first pipeline is a curved pipe, which means that the overall flow direction of the fluid will change when flowing in the first pipeline; the first pipeline can be as follows: Figure 1 and Figure 2 The S-shaped elbow shown may also be an L-shaped or circular elbow, etc., or may be an inclined straight pipe connected between the first joint / second joint and the inlet end of the flow meter assembly. Since the flow direction of the fluid flowing from the first joint / second joint into the inclined straight pipe will change, the inclined straight pipe may also be regarded as the elbow.

[0051] The first pipeline adopts a bent pipe, which can prevent illegal gas / water thefts from inserting tools from the entrance of the first joint / second joint to damage the internal structure of the flow meter assembly or affect the operation of the flow meter assembly to a certain extent, thereby protecting the flow meter assembly and preventing illegal gas / water thefts.

[0052] Since the structure of the valve body of the control valve assembly is less prone to damage than that of the precision flow meter assembly, the second pipeline may be as follows: Figure 2 The straight pipe shown can, of course, also be a curved pipe, which can be specifically configured according to actual needs.

[0053] like Figure 3 As shown, optionally, a first group of clamp mounting positions 113 and a second group of clamp mounting positions 114 are further provided in the shell 1; the first group of clamp mounting positions 113 includes two mounting columns with mounting holes arranged at the lower end of the first joint 2, and the two mounting columns are respectively arranged on both sides of the first joint 2; the second group of clamp mounting positions 114 includes two mounting columns with mounting holes arranged at the lower end of the second joint 3, and the two mounting columns are respectively arranged on both sides of the second joint 3.

[0054] In this embodiment, the two groups of clamp installation positions can be used to connect clamps respectively, and the clamps are used to fix the first pipeline or the second pipeline, so that the installation of the first pipeline and the second pipeline is more stable.

[0055] like Figure 1 and Figure 6 As shown, optionally, the shell 1 includes a shell body 11 and a cover body 12 covered on the shell body 11, the first joint 2 and the second joint 3 are arranged on the shell body 11, and the flow meter assembly 4 and the control valve assembly 5 are arranged in the shell body 11; the cover body 12 is provided with a first sensor mounting hole 121 and a second sensor mounting hole 122; wherein, when the flow meter assembly 4 is mounted on the first group of mounting positions through the first group of matching parts, a flow sensor 6 is installed in the first sensor mounting hole 121, and the flow sensor 6 corresponds to the signal transmitting disk of the flow meter in the flow meter assembly 4, and a pressure sensor 7 is installed in the second sensor mounting hole 122; when the flow meter assembly 4 is mounted on the second group of mounting positions through the first group of matching parts (see Figure 2 ), a flow sensor 6 is installed in the second sensor installation hole 122, and the flow sensor 6 corresponds to the signal transmitting disk of the flow meter in the flow meter assembly 4, and a pressure sensor 7 is installed in the first sensor installation hole 121.

[0056] In this embodiment, the split design of the housing facilitates the installation of the flow meter assembly and the control valve assembly in the housing; the pressure sensor is used to measure the pressure in the housing; when the flow meter assembly includes a rotary flow meter, the flow sensor is used to cooperate with the transmitter disk in the rotary flow meter to measure the flow rate. Specifically, the flow sensor is used to sense the number of rotations of the rotary and convert it into an electrical signal, thereby achieving flow measurement. The flow sensor can also be replaced by a temperature flow sensor, so that in addition to measuring the flow rate, the temperature in the housing can also be measured. Therefore, the monitored pressure value and / or temperature value can be used to determine whether the fluid transmission is normal or whether the metering device is working normally; or, according to the detected pressure value, the measured flow value is pressure compensated, and according to the detected temperature value, the measured flow value is temperature compensated.

[0057] The positions of the flow sensor and the pressure sensor are interchangeable. Thus, the flow sensor can be installed in the first sensor mounting hole or the second sensor mounting hole according to the installation position of the flow meter assembly in the housing, so that the flow sensor can cooperate with the flow meter assembly.

[0058] like Figure 7 As shown, optionally, a sealing assembly 13 is provided between the cover body 12 and the shell body 11 to form a sealed cavity between the cover body 12 and the shell body 11; the outlet end of the flowmeter in the flowmeter assembly 4 and the inlet end of the control valve in the control valve assembly 5 are jointly opened in the sealed cavity.

[0059] In this embodiment, the sealing assembly arranged between the cover body and the shell body ensures the sealing of the sealed inner cavity. Since the outlet end of the flow meter and the inlet end of the control valve are both opened in the sealed cavity of the shell, the outlet end of the flow meter and the inlet end of the control valve can be interconnected through the sealed cavity, so that the flow meter assembly and the control valve assembly do not need to be connected (direct connection or connection by setting a connector), and flow transmission can be achieved through the sealed cavity. In this way, compared with direct connection or connection through a connector, the arrangement position of the flow meter assembly and the control valve assembly can be more flexible, and it is not necessary to extend the arrangement in the same direction; thereby, the arrangement between the flow meter assembly and the control valve assembly can be more compact, thereby reducing the volume of the entire fluid metering device and facilitating the installation of the fluid metering device.

[0060] like Figure 7As shown, optionally, the cover body 12 is connected to a controller 8, the cover body 12 is provided with a card slot, the controller 8 is provided with a buckle, and the controller 8 is clamped in the card slot through the buckle; the flow sensor 6, the pressure sensor 7 and the control valve are electrically connected to the controller 8 respectively.

[0061] In this embodiment, the flow sensor, pressure sensor, and control valve assembly can be electrically connected to the controller through wiring terminals respectively; the flow sensor and pressure sensor transmit the measured flow and pressure values ​​of the actual working conditions to the controller, and the controller is used to control the opening and closing of the control valve according to the pressure in the shell and / or the user's arrears status.

[0062] Optionally, when the pressure value measured by the pressure sensor is not within a normal range, the controller may also sound an alarm; the controller may also display the user's arrears, balance, pressure in the housing, fluid usage, etc.

[0063] like Figure 1 and Figure 2 As shown, optionally, the flow meter assembly 4 can be arranged vertically in the housing 1 , with the inlet end of the flow meter assembly 4 located at the upper part of the flow meter assembly 4 , and the outlet end of the flow meter assembly 4 located at the lower part of the flow meter assembly 4 .

[0064] In this embodiment, the flow meter assembly is installed vertically in the shell (air intake is from top to bottom). Impurities will fall directly to the bottom of the flow meter assembly due to their own weight, and will not easily accumulate in the metering cavity of the flow meter assembly to cause meter jamming.

[0065] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0066] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0067] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A fluid metering device, characterized in that: It comprises a shell, wherein a first joint and a second joint communicating with the interior of the shell are arranged on the outer wall of the shell, and a first group of mounting positions and a second group of mounting positions are arranged in the shell; A flow meter assembly is disposed in the housing, and the flow meter assembly has a first group of matching parts, and the first group of matching parts can match the first group of installation positions and the second group of installation positions respectively; the flow meter assembly is connected in series to the fluid transmission pipeline through the first joint and the second joint, and is used to measure the flow passing through the flow meter assembly; in, The flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the first joint; or The flow meter assembly is installed on the second group of installation positions through the first group of matching parts, and the inlet end of the flow meter assembly is connected to the second joint; A control valve assembly is also disposed in the housing, and a second group of matching parts is provided on the control valve assembly, and the second group of matching parts can be matched with the first group of installation positions and the second group of installation positions respectively; When the flow meter assembly is installed on the first group of installation positions, the control valve assembly is installed on the second group of installation positions through the second group of matching parts, and the inlet end of the control valve in the control valve assembly is connected to the outlet end of the flow meter in the flow meter assembly, and the outlet end of the control valve in the control valve assembly is connected to the second joint; When the flow meter assembly is installed on the second group of mounting positions, the control valve assembly is installed on the first group of mounting positions through the second group of mating parts, and the inlet end of the control valve in the control valve assembly is connected to the outlet end of the flow meter in the flow meter assembly, and the outlet end of the control valve in the control valve assembly is connected to the first joint.

2. The fluid metering device according to claim 1, characterized in that: The first group of mounting positions is arranged at a position in the housing close to the first joint, and the second group of mounting positions is arranged at a position in the housing close to the second joint; The first joint and the second joint are external thread joints, and are symmetrically arranged at the upper end of the housing with respect to the central axis of the housing; The first group of mounting positions and the second group of mounting positions are symmetrically arranged about the central axis of the housing.

3. The fluid metering device according to claim 1, characterized in that: The first group of mounting positions and the second group of mounting positions respectively include at least two mounting posts with mounting holes disposed on the inner wall of the housing, and each mounting post is a mounting position; The first group of matching parts includes a first group of mounting holes, the first group of mounting holes are arranged corresponding to at least two mounting posts of the first group of mounting positions, and the second group of matching parts includes a second group of mounting holes, the second group of mounting holes are arranged corresponding to at least two mounting posts of the second group of mounting positions; At least one mounting position in the first group of mounting positions and the second group of mounting positions is a common mounting position.

4. The fluid metering device according to claim 3, characterized in that: The first group of mounting positions and the second group of mounting positions respectively include at least one mounting column for mounting the flow meter assembly and at least one mounting column for mounting the control valve assembly; The height of the mounting column for mounting the control valve assembly is smaller than the height of the mounting column for mounting the flow meter assembly.

5. The fluid metering device according to claim 4, characterized in that: The first group of mounting positions and the second group of mounting positions each include at least two mounting posts for mounting the flow meter assembly; At least one of the mounting posts for mounting the flow meter assembly is disposed near the upper end of the housing, and at least one of the mounting posts for mounting the flow meter assembly is disposed near the lower end of the housing; The mounting column for mounting the control valve assembly is arranged between at least two mounting columns for mounting the flow meter assembly.

6. The fluid metering device according to claim 1, characterized in that: The housing is also provided with a first set of clamp mounting positions and a second set of clamp mounting positions; The first group of clamp mounting positions includes two mounting posts with mounting holes disposed at the lower end of the first joint, and the two mounting posts are respectively disposed on both sides of the first joint; The second group of clamp mounting positions includes two mounting posts with mounting holes arranged at the lower end of the second joint, and the two mounting posts are respectively arranged on both sides of the second joint.

7. The fluid metering device according to claim 1, characterized in that: The flow meter assembly comprises a flow meter and a flow meter mounting frame, the flow meter is arranged on the flow meter mounting frame, the first group of matching parts is arranged on the flow meter mounting frame, wherein the flow meter is a rotary flow meter or a turbine flow meter; The control valve assembly comprises a control valve and a control valve mounting frame, the control valve is arranged on the control valve mounting frame, and the second group of matching parts is arranged on the control valve mounting frame.

8. The fluid metering device according to claim 1, characterized in that: The housing comprises a housing body and a cover body provided on the housing body, the first joint and the second joint are provided on the housing body, and the flow meter assembly and the control valve assembly are provided in the housing body; The cover body is provided with a first sensor mounting hole and a second sensor mounting hole; wherein, When the flow meter assembly is installed on the first group of mounting positions through the first group of matching parts, a flow sensor is installed in the first sensor mounting hole, and the flow sensor corresponds to the signal transmitting disk of the flow meter in the flow meter assembly, and a pressure sensor is installed in the second sensor mounting hole; When the flow meter assembly is installed on the second group of mounting positions through the first group of mating parts, a flow sensor is installed in the second sensor mounting hole, and the flow sensor corresponds to the signal transmitting disk of the flow meter in the flow meter assembly, and a pressure sensor is installed in the first sensor mounting hole.

9. The fluid metering device according to claim 8, characterized in that: A sealing assembly is provided between the cover body and the shell body, forming a sealed cavity between the cover body and the shell body; The outlet end of the flow meter in the flow meter assembly and the inlet end of the control valve in the control valve assembly open into the sealing cavity together.

10. The fluid metering device according to claim 8, characterized in that: The cover body is connected to a control instrument, the cover body is provided with a card slot, the control instrument is provided with a buckle, and the control instrument is clamped in the card slot through the buckle; The flow sensor, the pressure sensor and the control valve are electrically connected to the controller respectively.

11. The fluid metering device according to claim 1, characterized in that: The inlet end of the flow meter in the flow meter assembly is connected to the first joint through a first pipeline, the first pipeline is a bend, and the outlet end of the control valve in the control valve assembly is connected to the second joint through a second pipeline; or The inlet end of the flow meter in the flow meter assembly is connected to the second joint through a first pipeline, the first pipeline is a bend pipe, and the outlet end of the control valve in the control valve assembly is connected to the first joint through a second pipeline.

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