Metering device

Abstract

The embodiment of the utility model provides a metering instrument, and relates to the technical field of metering instruments. The metering instrument comprises a first part, a second part and a sealing piece. The first part is provided with a fluid inlet; the second part is provided with a fluid outlet connected with the fluid inlet; the sealing piece is constructed to be integrally formed with the fluid inlet or the fluid outlet so that the fluid inlet of the first component can be connected with the fluid outlet of the second component in a sealed mode. The sealing element and the fluid inlet or the fluid outlet are integrally formed, so that the sealing element does not need to be assembled with the first component or the second component, the assembly materials of the metering instrument can be reduced, the assembly is simple, and the assembly workload is further reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of measuring instruments, in particular to a measuring instrument. Background Art

[0002] Electronic metering instruments (such as ultrasonic metering, thermal metering, etc.) are widely used in fluid metering due to their simple structure, no mechanical transmission parts, no internal wear and other performance characteristics. Electronic metering instruments include metering modules and valves. The metering module is used to rectify and meter the fluid, and the valve is used to control the on-off and flow rate of the fluid. The valve needs to be connected to the metering module and the instrument connector to control the fluid transported in the instrument. The connection needs to be sealed to avoid internal leakage.

[0003] In the prior art, the connection between the valve and the metering module is often assembled to the interface with a rubber sealing ring and then fastened with screws or retaining springs; the connection between the valve and the instrument connector is often assembled to the interface with a rubber sealing ring and then fastened with screws or retaining springs.

[0004] However, during the assembly process of valves and metering modules or instrument connectors, there are many assembly materials and the assembly is complicated, resulting in a large workload. Utility Model Content

[0005] The embodiment of the utility model provides a metering instrument to solve the problem of many assembling materials and complicated assembly, which leads to a large assembling workload, during the assembly process of a valve and a metering module or an instrument joint.

[0006] The utility model provides a measuring instrument, comprising:

[0007] A first component having a fluid inlet;

[0008] a second component having a fluid outlet connected to the fluid inlet;

[0009] The sealing member is configured to be integrally formed with the fluid inlet or the fluid outlet so as to seal the fluid inlet of the first component and the fluid outlet of the second component.

[0010] In a possible implementation manner, the sealing member is a silicone foam sealing ring, the end surface of the fluid inlet or the fluid outlet has a sealing groove, and the sealing member is cast in the sealing groove.

[0011] In a possible implementation manner, the first component has a clamping portion, and the second component has a matching portion, and the clamping portion is clamped and connected with the matching portion, so that the first component and the second component are relatively fixed.

[0012] In a possible implementation, the matching portion includes a plurality of hooks, the engaging portion includes a plurality of buckles, and the plurality of buckles of the engaging portion are engaged and connected with the plurality of hooks of the matching portion in a one-to-one correspondence.

[0013] In a possible implementation manner, the first component is a valve assembly, and the fluid inlet is a valve fluid inlet;

[0014] The second component is a metering module, the fluid outlet is a metering fluid outlet, and the sealing member is a first sealing member integrally formed with the metering fluid outlet.

[0015] In a possible implementation manner, a sealing rib is provided on the end surface of the valve fluid inlet, the sealing rib extends along the circumference of the valve fluid inlet, and the sealing rib can abut against the first sealing member.

[0016] In a possible implementation manner, the width of the sealing rib is smaller than the width of the first sealing member, and the sealing rib can squeeze the first sealing member.

[0017] In a possible implementation manner, the sealing groove is a first sealing groove on an end surface of the metered fluid outlet, and the first sealing member is cast in the first sealing groove.

[0018] In a possible implementation manner, the first component is a housing, the fluid inlet is an outflow joint inlet of the housing, and the sealing member is a second sealing member integrally formed with the outflow joint inlet;

[0019] The second component is a valve assembly, and the fluid outlet is a valve fluid outlet.

[0020] In a possible implementation manner, the sealing groove is a second sealing groove on an end surface of the outflow joint inlet, and the second sealing member is cast in the second sealing groove.

[0021] The utility model provides a metering instrument, comprising a first component, a second component and a sealing member; the first component has a fluid inlet; the second component has a fluid outlet connected to the fluid inlet; the sealing member is configured to be integrally formed with the fluid inlet or the fluid outlet, so that the fluid inlet of the first component is sealed and connected with the fluid outlet of the second component. By integrally forming the sealing member with the fluid inlet or the fluid outlet, the sealing member does not need to be assembled with the first component or the second component, thereby reducing the assembly materials of the metering instrument, simplifying the assembly, and further reducing the assembly workload. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0023] Figure 1 An exploded schematic diagram of a measuring instrument provided in an embodiment of the utility model;

[0024] Figure 2 A cross-sectional schematic diagram of a measuring instrument provided in an embodiment of the utility model;

[0025] Figure 3 An exploded schematic diagram of a valve and a metering module provided in an embodiment of the utility model;

[0026] Figure 4 A schematic cross-sectional view of the valve and metering module after assembly provided by an embodiment of the utility model;

[0027] Figure 5 for Figure 4 An enlarged schematic diagram of A in FIG.

[0028] Figure 6 A schematic diagram of the structure of the lower housing provided by an embodiment of the utility model;

[0029] Figure 7 A partial schematic diagram of a measuring instrument provided in an embodiment of the utility model;

[0030] Figure 8 for Figure 2 Schematic diagram of a partial cross section of the measuring instrument.

[0031] Description of reference numerals:

[0032] 10-housing; 101-upper housing; 102-lower housing; 11-inflow joint; 12-outflow joint; 121-outflow joint inlet; 1211-fourth end face; 1212-fourth side face; 1213-second sealing groove; 1214-second bayonet; 13-housing sealing ring; 14-fastening screw; 15-first supporting structure; 151-first supporting surface; 152-first limiting rib; 16-second supporting structure; 161-second supporting surface; 162-second limiting rib; 17-guide plate; 18-second sealing member; 20-valve assembly; 201-valve Fluid inlet; 2011-first end face; 2012-first side face; 2013-sealing rib; 2014-first buckle; 2015-first bayonet; 202-valve fluid outlet; 2021-second end face; 2022-second side face; 2023-second hook; 2024-second guide face; 30-metering module; 301-metering fluid inlet; 302-metering fluid outlet; 3021-third end face; 3022-third side face; 3023-first sealing groove; 3024-first hook; 3025-first guide face; 31-first sealing member. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of 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.

[0034] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly defined and specified, the terms "installation", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] In the present invention, unless otherwise clearly specified and limited, a first feature being “on” or “under” a second feature may mean that the first and second features are in direct contact with each other, or the first and second features are in indirect contact with each other through an intermediate medium.

[0037] In the above description, the description with reference to the terms "some embodiments", "examples", or "specific examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0038] As described in the background technology, during the assembly process of the valve and the metering module or the instrument connector, there are many materials to assemble and the assembly is complicated, resulting in a large amount of assembly work. The inventors have found that the reason for this problem is that during the assembly process of the valve and the metering module or the instrument connector, it is necessary to prepare a rubber sealing ring and assemble the rubber sealing ring to the metering module or the instrument connector, which makes the assembly process of the valve and the metering module or the instrument connector more materials to assemble and the assembly is complicated, resulting in a large amount of assembly work. In addition, when installing the rubber sealing ring, the rubber sealing ring is prone to unevenness (twisting, or deformation such as being pulled up in some positions and squeezed in some positions), which affects the sealing performance.

[0039] In order to solve the above problems, the embodiment of the utility model provides a metering instrument. For two parts that need to be sealed and connected, the seal is integrally formed with one part. During the assembly process of the two parts, there is no need to prepare the seal, and the seal does not need to be assembled to the parts that need to be sealed and connected, so that during the assembly process of the two parts, the assembly materials can be reduced, the assembly is simple, and the assembly workload can be reduced. By integrally forming the seal with one part, during the assembly process of the two parts, there is no need to install the seal, so that unevenness in the installation of the seal can be avoided, and the sealing between the two parts can be ensured.

[0040] The measuring instrument provided by the embodiment of the utility model is described in detail below in conjunction with specific embodiments.

[0041] An embodiment of the utility model provides a measuring instrument, comprising a first component, a second component and a sealing element.

[0042] The measuring instruments include but are not limited to ultrasonic measuring instruments, thermal measuring instruments, etc. The measuring instruments are used for the measurement of gases and liquids.

[0043] The first component and the second component are two components in the meter that need to be sealed and connected. For example, Figure 1 and Figure 2 As shown, the two components that need to be sealed and connected in the metering instrument can be the housing 10 and the valve assembly 20 , or can be the valve assembly 20 and the metering module 30 .

[0044] The first component has a fluid inlet, and the second component has a fluid outlet connected to the fluid inlet. That is to say, of the two components that need to be sealed in the metering instrument, one component has a fluid inlet and the other component has a fluid outlet. It is easy to understand that the fluid in the metering instrument can flow from the fluid outlet of the second component into the fluid inlet of the first component.

[0045] For example, Figure 1 As shown, the housing 10 has an inflow joint 11 and an outflow joint 12. When the metering module 30 is connected to the valve assembly 20, and the valve assembly 20 is connected to the outflow joint 12, the first component may be the valve assembly 20, and the second component may be the metering module 30; when the metering module 30 is connected to the valve assembly 20, and the valve assembly 20 is connected to the outflow joint 12, the first component may also be the outflow joint 12, and the second component may also be the valve assembly 20. In other embodiments, when the inflow joint 11 is connected to the valve assembly 20, and the valve assembly 20 is connected to the metering module 30, the first component may be the valve assembly 20, and the second component may be the inflow joint 11; when the inflow joint 11 is connected to the valve assembly 20, and the valve assembly 20 is connected to the metering module 30, the first component may also be the metering module 30, and the second component may also be the valve assembly 20.

[0046] The sealing member is configured to be integrally formed with the fluid inlet of the first component or the fluid outlet of the second component, so that the fluid inlet of the first component is sealed and connected with the fluid outlet of the second component. Exemplarily, the end surface of the fluid inlet or the fluid outlet has a sealing groove, and the sealing member is cast in the sealing groove, so that the sealing member is integrally formed with the fluid inlet or the fluid outlet. The sealing member can be a silicone foam sealing ring.

[0047] The measuring instrument provided by the embodiment of the utility model forms the seal integrally with the fluid inlet of the first component or the fluid outlet of the second component, so that the seal does not need to be assembled with the first component or the second component, thereby reducing the assembly materials of the measuring instrument, simplifying the assembly, and reducing the assembly workload.

[0048] In a possible implementation, the first component has a snap-fitting portion, the second component has a matching portion, and the snap-fitting portion is snap-fitted with the matching portion to fix the first component and the second component relatively. This arrangement allows the first component and the second component to be fixed without additional components, which can reduce the assembly materials of the metering instrument, simplify assembly, and thus reduce the assembly workload.

[0049] The engaging portion may include a plurality of buckles, the matching portion may include a plurality of hooks, and the plurality of hooks are engaged and connected with the plurality of buckles in a one-to-one correspondence.

[0050] In a possible implementation, Figures 2 to 5 As shown, the first component is the valve assembly 20 , and the second component is the metering module 30 .

[0051] The structure of the valve assembly 20 is not specifically limited, and it can be any valve assembly that can connect and shut off a flow path. For example, the valve assembly 20 includes an L-shaped flow channel and a valve that are sealed and fixedly connected together.

[0052] like Figure 3 As shown, the valve assembly 20 has a valve fluid inlet 201 and a valve fluid outlet 202. The fluid in the metering instrument can enter the valve assembly 20 from the valve fluid inlet 201, and the fluid in the valve assembly 20 can flow out from the valve fluid outlet 202. The valve assembly 20 is a first component, and the fluid inlet of the first component is also the valve fluid inlet 201 of the valve assembly 20.

[0053] The valve fluid inlet 201 and the valve fluid outlet 202 may both be circular in shape. The axial surface of the valve fluid inlet 201 is the first end surface 2011 (see Figure 5 ), the radially outer side of the valve fluid inlet 201 is the first side surface 2012 (see Figure 3 as shown); Figure 6 and Figure 7 As shown, the axial surface of the valve fluid outlet 202 is the second end surface 2021 (see Figure 8 The radially outer side of the valve fluid outlet 202 is the second side surface 2022 (see Figure 7 shown).

[0054] A sealing rib 2013 is provided on the end surface of the valve fluid inlet 201 (see Figure 5 That is, a sealing rib 2013 is provided on the first end surface 2011, and the sealing rib 2013 extends along the circumference of the valve fluid inlet 201. The sealing rib 2013 is in the shape of a circular ring. The sealing rib 2013 protrudes from the first end surface 2011.

[0055] The type of the metering module 30 is not specifically limited, and it can be a diaphragm metering module, an ultrasonic metering module, etc.

[0056] like Figure 3 As shown, the metering module 30 has a metering fluid inlet 301 and a metering fluid outlet 302. The fluid in the metering instrument can enter the metering module 30 from the metering fluid inlet 301, and the fluid in the metering module 30 can flow out from the metering fluid outlet 302. The metering module 30 is a second component, and the fluid outlet of the second component is also the valve metering fluid outlet 302 of the metering module 30.

[0057] The shape of the metering fluid inlet 301 is not particularly limited. The shape of the metering fluid outlet 302 is circular.

[0058] like Figures 3 to 5 As shown, the axial surface of the metering fluid outlet 302 is the third end surface 3021 , and the radial outer surface of the metering fluid outlet 302 is the third side surface 3022 .

[0059] The metering fluid outlet 302 may be integrally formed with a first sealing member 31. Specifically, the end surface of the metering fluid outlet 302 has a first sealing groove 3023, that is, the third end surface 3021 has a first sealing groove 3023, the first sealing groove 3023 extends along the circumference of the metering fluid outlet 302, and the first sealing member 31 is cast in the first sealing groove 3023, so that the first sealing member 31 and the metering fluid outlet 302 are integrally formed.

[0060] The sealing rib 2013 may abut against the first sealing member 31. Specifically, the width of the sealing rib 2013 is smaller than the width of the first sealing member 31. When the valve assembly 20 and the metering module 30 are fixed together, the sealing rib 2013 squeezes the first sealing member 31.

[0061] The first sealing groove 3023 is a circular groove. The first sealing member 31 is a silicone foam sealing ring.

[0062] During the production of the metering module 30, liquid material is poured into the first sealing groove 3023 to form the first sealing member 31. This arrangement allows the first sealing member 31 to be formed without developing a mold, thereby reducing the manufacturing cost of the metering instrument.

[0063] The first sealing member 31 is in the shape of a circular ring and is flush with the third end surface 3021 , that is, the surface of the first sealing member 31 exposed on the metering module 30 and the third end surface 3021 are located in the same plane.

[0064] like Figure 4 and Figure 5As shown, when the valve assembly 20 and the metering module 30 are fixed together, the first end face 2011 of the valve fluid inlet 201 abuts against the third end face 3021 of the metering fluid outlet 302, and the sealing rib 2013 abuts against the first sealing component 31 and squeezes the first sealing component 31, so that the sealing rib 2013 cooperates with the first sealing component 31 to achieve a sealed connection between the valve fluid inlet 201 of the valve assembly 20 and the metering fluid outlet 302 of the metering module 30, thereby achieving metering accuracy.

[0065] Furthermore, the valve assembly 20 has a first engaging portion, the metering module 30 has a first matching portion, and the first engaging portion is engaged with the first matching portion, so that the valve assembly 20 and the metering module 30 can be relatively fixed. In this way, it is possible to avoid the valve assembly 20 and the metering module 30 being fixed by screws or retaining springs, so that during the assembly process of the valve assembly 20 and the metering module 30, the assembly materials can be reduced, the assembly is simple, and the assembly workload is reduced.

[0066] The first engaging portion includes a plurality of first buckles 2014 (see Figure 3 As shown), the first buckle 2014 is constructed with a first bayonet 2015.

[0067] A plurality of first buckles 2014 are arranged on the outer side of the valve fluid inlet 201, that is, a plurality of first buckles 2014 are arranged on the first side surface 2012, and a plurality of first buckles 2014 are arranged at intervals along the circumference of the valve fluid inlet 201. Exemplarily, the first engaging portion includes three first buckles 2014, and the three first buckles 2014 are arranged on the first side surface 2012 at equal intervals.

[0068] The first matching portion includes a plurality of first hooks 3024 (see Figure 3 As shown in FIG. 3 , a plurality of first hooks 3024 are arranged on the outer side of the metering fluid outlet 302, that is, a plurality of first hooks 3024 are arranged on the third side surface 3022, and a plurality of first hooks 3024 are arranged at intervals along the circumference of the metering fluid outlet 302, and a plurality of first hooks 3024 are connected in a one-to-one corresponding manner with a plurality of first buckles 2014. Exemplarily, the first matching portion includes three first hooks 3024, and the three first hooks 3024 are arranged at equal intervals on the third side surface 3022. The three first hooks 3024 of the metering module 30 are respectively engaged in the first bayonet 2015 of the three first buckles 2014 of the valve assembly 20, so that the valve assembly 20 and the metering module 30 are fixed together.

[0069] The first hook 3024 has a first guide surface 3025, and an end of the first guide surface 3025 close to the third end surface 3021 is closer to the axis of the metered fluid outlet 302 in the radial direction of the metered fluid outlet 302 than an end of the first guide surface 3025 far from the third end surface 3021. When the valve assembly 20 is assembled with the metering module 30, the first buckle 2014 slides along the first guide surface 3025, so that the first hook 3024 is engaged in the first bayonet 2015.

[0070] In a possible implementation, the housing 10 includes an upper housing 101 and a lower housing 102 (see Figure 2 As shown), a shell sealing ring 13 is arranged between the upper shell 101 and the lower shell 102, and the upper shell 101 and the lower shell 102 are fixed by fastening screws 14. The shell sealing ring 13 realizes the sealing of the connection between the upper shell 101 and the lower shell 102, so that a closed cavity is formed inside the upper shell 101 and the lower shell 102.

[0071] The upper shell 101 is provided with an inlet joint 11 and an outlet joint 12 , and the fluid can only flow into the shell 10 from the inlet joint 11 , and the fluid inside the shell 10 can only flow out from the outlet joint 12 .

[0072] like Figure 1 As shown, a rectangular coordinate system is established for the housing 10. The X-axis direction is the length direction of the housing 10, the Y-axis direction is the width direction of the housing 10, and the Z-axis direction is the height direction of the housing 10. The X-axis, Y-axis and Z-axis are perpendicular to each other.

[0073] like Figure 6 As shown, a first support structure 15 for supporting the metering module 30 is provided on the lower housing 102, and the first support structure 15 includes a first support surface 151 and two first limiting ribs 152, and the two first limiting ribs 152 are arranged opposite to each other in the Y-axis direction. When the metering module 30 is installed on the first support structure 15, the metering module 30 is supported on the first support surface 151, and the two first limiting ribs 152 are respectively abutted against the two sides of the metering module 30 in the Y-axis direction, and the metering module 30 is limited in the Y-axis direction.

[0074] The lower housing 102 is also provided with a second support structure 16 for supporting the valve assembly 20. The second support structure 16 includes a second support surface 161 and four second limiting ribs 162, wherein two second limiting ribs 162 are arranged opposite to each other in the X-axis direction, and the other two second limiting ribs 162 are arranged opposite to each other in the Y-axis direction. When the valve assembly 20 is mounted on the second support structure 16, the valve assembly 20 is supported on the second support surface 161, and the four second limiting ribs 162 are respectively in contact with both sides of the valve assembly 20 in the X-axis direction and both sides of the Y-axis direction, and limit the valve assembly 20 in the X-axis direction and the Y-axis direction.

[0075] A guide plate 17 is fixed between the upper shell 101 and the lower shell 102 , and the guide plate 17 can guide the fluid to flow toward the metering fluid inlet 301 of the metering module 30 .

[0076] In a possible implementation manner, the first component is a housing 10 , and the second component is a valve assembly 20 .

[0077] Among them, Figure 7 As shown, the outflow joint 12 has an outflow joint inlet 121. The fluid flowing out of the valve fluid outlet 202 in the valve assembly 20 flows into the outflow joint 12 from the outflow joint inlet 121. The housing 10 is the first component, and the fluid inlet of the first component is the outflow joint inlet 121 of the outflow joint 12 of the housing 10.

[0078] The shape of the outflow joint inlet 121 is circular. Figure 7 and Figure 8 As shown, the inner surface of the outflow joint inlet 121 in the axial direction is a fourth end surface 1211 , and the outer surface of the outflow joint inlet 121 in the radial direction is a fourth side surface 1212 .

[0079] The second sealing member 18 is integrally formed on the outflow joint inlet 121. Specifically, the end surface of the outflow joint inlet 121 has a second sealing groove 1213, that is, the fourth end surface 1211 has a second sealing groove 1213, the second sealing groove 1213 extends along the circumference of the outflow joint inlet 121, and the second sealing member 18 is cast in the second sealing groove 1213, so that the second sealing member 18 is integrally formed with the outflow joint 12 of the housing 10.

[0080] The second sealing groove 1213 is a circular groove. The second sealing member 18 is a silicone foam sealing ring.

[0081] During the production of the housing 10, liquid material is poured into the second sealing groove 1213 to form the second sealing member 18. This arrangement allows the second sealing member 18 to be formed without developing a mold, thereby reducing the manufacturing cost of the meter.

[0082] The second sealing member 18 is in the shape of a circular ring and partially protrudes from the fourth end surface 1211 .

[0083] When the valve assembly 20 is fixed to the outflow connector 12, the end face of the valve fluid outlet 202 abuts against the second sealing member 18, that is, the second end face 2021 abuts against the second sealing member 18 and squeezes the second sealing member 18, so that the second end face 2021 cooperates with the second sealing member 18 to achieve a sealed connection between the valve fluid outlet 202 of the valve assembly 20 and the outflow connector inlet 121 of the outflow connector 12, thereby achieving metering accuracy.

[0084] Furthermore, the outflow joint 12 of the housing 10 has a second engaging portion, the valve assembly 20 has a second matching portion, and the second engaging portion is engaged with the second matching portion, so that the valve assembly 20 and the outflow joint 12 of the housing 10 can be relatively fixed. In this way, it is possible to avoid the valve assembly 20 and the outflow joint 12 being fixed by screws or retaining springs, so that during the assembly process of the valve assembly 20 and the outflow joint 12, the assembly materials can be reduced, the assembly is simple, and the assembly workload is reduced.

[0085] The second engaging portion includes a plurality of second buckles, each of which is configured with a second bayonet 1214, and the plurality of second bayonet 1214 are arranged at intervals along the circumference of the outflow joint inlet 121. For example, Figure 7 As shown, the second engaging portion includes two square second engaging openings 1214 , and the two second engaging openings 1214 are arranged at equal intervals on the fourth side surface 1212 .

[0086] The second matching portion includes a plurality of second hooks 2023, which are arranged on the outer side of the valve fluid outlet 202, that is, the plurality of second hooks 2023 are arranged on the second side surface 2022, and the plurality of second hooks 2023 are arranged at intervals along the circumference of the valve fluid outlet 202, and the plurality of second hooks 2023 are engaged and connected with the plurality of second bayonet ports 1214 in a one-to-one correspondence. Figure 7 As shown, the second matching portion includes two second hooks 2023, which are arranged at equal intervals on the second side 2022. The two second hooks 2023 of the valve assembly 20 are respectively engaged in the two second bayonet holes 1214 of the outflow connector 12, so that the valve assembly 20 and the outflow connector 12 are fixed together.

[0087] Figure 7 As shown, the second hook 2023 has a second guide surface 2024, and the end of the second guide surface 2024 close to the second end surface 2021 is closer to the axis of the valve fluid outlet 202 in the radial direction of the valve fluid outlet 202 than the end of the second guide surface 2024 far from the second end surface 2021. When the valve assembly 20 is assembled with the outflow connector 12, the second engaging portion slides along the second guide surface 2024, so that the second hook 2023 is engaged in the second bayonet 1214.

[0088] Figure 3 The valve assembly 20 and the metering module 30 in FIG. 1 are schematic diagrams before assembly. Figure 4 The valve assembly 20 and the metering module 30 are schematic diagrams after assembly. Figure 7 A schematic diagram of the valve assembly 20 and the metering module 30 when the whole is assembled but not assembled with the housing 10, Figure 8Schematic diagram of the valve assembly 20 and the metering module 30 being assembled together with the housing 10.

[0089] like Figure 2 , Figure 3 and Figure 4 As shown, after the valve assembly 20 and the metering module 30 are assembled, the whole is placed in the lower housing 102, the second support structure 16 on the lower housing 102 supports and limits the valve assembly 20, and the first support structure 15 supports and limits the metering module 30; then, as shown in Figure 2 , Figure 7 and Figure 8 As shown, the upper shell 101 is assembled, and the outflow joint inlet 121 of the outflow joint 12 on the upper shell 101 is engaged with the valve fluid outlet 202 of the valve assembly 20, so that the valve assembly 20 is sealed and connected with the outflow joint 12. At the same time, the upper shell 101 and the lower shell 102 are fastened with the fastening screws 14, so that the upper shell 101 and the lower shell 102 are assembled together, and at the same time, the upper limit of the valve assembly 20 in the Z-axis direction is realized.

[0090] Figure 2 The arrows in the figure indicate the direction of fluid flow. Figure 2 As shown, the fluid flows in from the inlet connector 11, is guided by the guide plate 17 and flows to the metering fluid inlet 301 of the metering module 30, and after the metering module 30 rectifies and meters the fluid, it flows into the valve fluid inlet 201 of the valve assembly 20 from the metering fluid outlet 302, passes through the inside of the valve assembly 20 and finally flows out from the outlet connector 12.

[0091] It should be noted that, in the present embodiment, when the valve fluid outlet 202 of the valve assembly 20 is sealedly connected to the outlet joint inlet 121 of the outlet joint 12 of the shell 10, the shell 10 serves as the first component and the valve assembly 20 serves as the second component; when the valve fluid inlet 201 of the valve assembly 20 is sealedly connected to the metering fluid outlet 302 of the metering module 30, the valve assembly 20 serves as the first component and the metering module 30 serves as the second component.

[0092] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A measuring instrument, characterized in that: include: A first component having a fluid inlet; a second component having a fluid outlet connected to the fluid inlet; The sealing member is configured to be integrally formed with the fluid inlet or the fluid outlet so as to seal the fluid inlet of the first component and the fluid outlet of the second component.

2. The measuring instrument according to claim 1, characterized in that: The sealing member is a silicone foam sealing ring, and the end surface of the fluid inlet or the fluid outlet has a sealing groove, and the sealing member is cast in the sealing groove.

3. The measuring instrument according to claim 2, characterized in that: The first component has a clamping portion, and the second component has a matching portion. The clamping portion is clamped and connected with the matching portion, so that the first component and the second component are relatively fixed.

4. The measuring instrument according to claim 3, characterized in that: The matching portion includes a plurality of hooks, and the engaging portion includes a plurality of buckles. The plurality of buckles of the engaging portion are engaged and connected with the plurality of hooks of the matching portion in a one-to-one correspondence.

5. The measuring instrument according to any one of claims 2 to 4, characterized in that: The first component is a valve assembly, and the fluid inlet is a valve fluid inlet; The second component is a metering module, the fluid outlet is a metering fluid outlet, and the sealing member is a first sealing member integrally formed with the metering fluid outlet.

6. The measuring instrument according to claim 5, characterized in that: A sealing rib is disposed on the end surface of the valve fluid inlet. The sealing rib extends along the circumference of the valve fluid inlet. The sealing rib can abut against the first sealing member.

7. The measuring instrument according to claim 6, characterized in that: The width of the sealing rib is smaller than the width of the first sealing member, and the sealing rib can squeeze the first sealing member.

8. The measuring instrument according to claim 5, characterized in that: The sealing groove is a first sealing groove on the end surface of the metering fluid outlet, and the first sealing member is cast in the first sealing groove.

9. The measuring instrument according to any one of claims 2 to 4, characterized in that: The first component is a housing, the fluid inlet is an outflow joint inlet of the housing, and the sealing member is a second sealing member integrally formed with the outflow joint inlet; The second component is a valve assembly, and the fluid outlet is a valve fluid outlet.

10. The measuring instrument according to claim 9, characterized in that: The sealing groove is a second sealing groove on the end surface of the outlet joint inlet, and the second sealing member is cast in the second sealing groove.

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