Sensor assembly and measuring instrument

Abstract

The utility model specifically relates to a sensor assembly and a measuring instrument, and the sensor assembly comprises a main body, an installation part, and a sensor. The main body is used for being installed on a shell. The mounting piece is movably arranged on the main body, and the mounting piece is provided with a first end which is used for being inserted into the interior of the shell. At least a portion of the sensor is disposed at the first end of the mount. According to the sensor provided by the utility model, the movable mounting piece is arranged on the main body, so that the sensor can adjust the insertion depth of the sensor on the shell along with the movement of the mounting piece, that is, the distance between the sensor and the turbine is adjustable, and further, the sensor can be matched and mounted with shells with different wall thicknesses; according to the sensor assembly, the applicability of the sensor assembly can be improved, then selection and matching of the length of the sensor can be reduced when the turbine flow meter is assembled, and the assembling efficiency of the turbine flow meter can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid measurement, in particular to a sensor component and a measuring instrument. Background Art

[0002] The turbine flowmeter is a velocity-type impeller flow measurement instrument. It uses the proportional relationship between the rotational angular velocity of the impeller placed in the fluid and the fluid flow rate to obtain the fluid flow rate by measuring the impeller rotation speed, and then obtains the flow value in the pipeline.

[0003] At present, the existing gas turbine flowmeter includes a shell and a sensor detachably arranged on the shell. Due to different working pressures, the use types of gas turbine flowmeters are different, that is, the wall thickness of the shell is different. When the flowmeter adopts high-frequency signal output calibration (using the pulse output of turbine rotation), the distance between the sealing end face of the shell and the outer circle of the turbine is different, so the length of the matched sensor is also different, and one-to-one matching is required. Especially in the calibration process, it is necessary to select a sensor of corresponding length according to the pressure level of the shell, and too many types of sensors will cause a waste of work time. Utility Model Content

[0004] The purpose of the utility model is to at least solve the problem of poor applicability of sensors in existing gas turbine flowmeters. This purpose is achieved through the following technical solutions:

[0005] The first aspect of the utility model provides a sensor, wherein the sensor assembly is used to be installed on a housing of a measuring instrument, and comprises:

[0006] A main body, the main body is used to be installed on the shell;

[0007] A mounting member, the mounting member is movably disposed on the main body, the mounting member has a first end, and the first end is used to be inserted into the interior of the housing;

[0008] A sensor, at least part of which is disposed at the first end of the mounting member.

[0009] The sensor described in the utility model includes a main body, a mounting part and a sensor. By arranging a movable mounting part on the main body, the insertion depth of the sensor on the shell can be adjusted as the mounting part moves, that is, the distance between the sensor and the turbine is adjustable, so that the sensor can be matched and installed with shells of different wall thicknesses, which helps to improve the applicability of the sensor assembly, and further reduces the selection of the sensor length when assembling the turbine flowmeter, which can effectively improve the assembly efficiency of the turbine flowmeter.

[0010] In addition, the sensor according to the utility model may also have the following additional technical features:

[0011] In some embodiments of the present invention, the sensor is detachably disposed inside the mounting member, and the length of the portion of the sensor extending outside the first end is adjustable.

[0012] In some embodiments of the utility model, the mounting member is configured to be tubular, the internal tube cavity of the mounting member near the first end is provided with an internal thread, the outer peripheral surface of the sensor is provided with an external thread, and the sensor and the mounting member are threadedly connected via the external thread and the internal thread.

[0013] In some embodiments of the present invention, the outer peripheral surface of the mounting member is provided with a groove, and the groove is extended along the axial direction of the mounting member; the sensor assembly further includes:

[0014] A first limiting member is passed through the main body and inserted into the slot.

[0015] In some embodiments of the present utility model, a limiting structure is provided at the first end of the mounting member, and the sensor assembly further comprises:

[0016] An elastic member, along the axial direction of the mounting member, one end of the elastic member abuts against the limiting structure, and the other end of the elastic member abuts against the main body.

[0017] In some embodiments of the present invention, the main body has a cavity, the mounting member is inserted into the main body, and the second end of the mounting member extends into the cavity.

[0018] In some embodiments of the present invention, the sensor assembly further comprises:

[0019] A second limiting member is provided on a portion of the mounting member extending to the cavity and can abut against the first portion along a moving direction of the mounting member.

[0020] In some embodiments of the present invention, an electrical connector is provided on the second portion, and the electrical connector is electrically connected to the sensor.

[0021] A second aspect of the present invention provides a measuring instrument, comprising the sensor assembly as described in the present invention, and the measuring instrument further comprises:

[0022] case;

[0023] A rear guide fluid, the rear guide fluid is arranged inside the shell;

[0024] a turbine, the turbine being mounted on the rear guide body;

[0025] The main body is mounted on the casing, the first end of the mounting member is in contact with the rear guide fluid, and the sensor is spaced apart from the turbine.

[0026] Compared with the prior art, the measuring instrument proposed by the present invention has the technical advantages possessed by the above-mentioned sensor assembly, which will not be described in detail here.

[0027] In some embodiments of the present utility model, a first mounting surface is formed on the shell, a second mounting surface is formed on the main body, the shell is threadedly connected to the main body, and the first mounting surface and the second mounting surface are arranged in abutment with each other; the measuring instrument further includes:

[0028] A first sealing member is sandwiched between the first mounting surface and the second mounting surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0030] Figure 1 It is a structural schematic diagram of the sensor assembly shown in the embodiment of the utility model;

[0031] Figure 2 It is a structural schematic diagram of the mounting member shown in the embodiment of the utility model;

[0032] Figure 3 It is a schematic diagram of the structure of the measuring instrument shown in the embodiment of the utility model;

[0033] Figure 4 for Figure 3 A is a partial enlarged schematic diagram of the middle part.

[0034] The symbols in the accompanying drawings are as follows:

[0035] 1000. Measuring instruments;

[0036] 100, sensor assembly; 200, housing; 300, rear guide fluid; 400, turbine;

[0037] 101, cavity; 201, first mounting surface;

[0038] 10. Part I;

[0039] 11. first groove; 12. second groove; 13. third groove; 14. fixing structure; 15. second mounting surface; 16. external threaded portion;

[0040] 20. Part II;

[0041] 21. First mounting hole;

[0042] 30. Mounting parts;

[0043] 31. tube body; 32. internal thread; 33. action part; 34. slot; 35. mounting slot;

[0044] 311, first end; 312, second end;

[0045] 40. Sensor;

[0046] 50. Elastic parts;

[0047] 61. first stopper; 62. second stopper;

[0048] 71, first sealing member; 72, second sealing member; 73, third sealing member; 74, fourth sealing member;

[0049] 80. Connectors;

[0050] 91. Electrical connector; 92. Resistor. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0052] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0053] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0054] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both above and below orientations.

[0055] The turbine flowmeter is a velocity-type impeller flow measurement instrument. It uses the proportional relationship between the rotational angular velocity of the impeller placed in the fluid and the fluid flow rate to obtain the fluid flow rate by measuring the impeller rotation speed, and then obtains the flow value in the pipeline.

[0056] At present, the existing gas turbine flowmeter includes a housing and a sensor detachably mounted on the housing. Due to different working pressures, the gas turbine flowmeter has different usage types, that is, the wall thickness of the housing is different. When the flowmeter uses high-frequency signal output for calibration (using the pulse output of turbine rotation), the distance between the sealing end face of the housing and the outer circle of the turbine is different, that is, Figure 4 The lengths of the length d mentioned in the figure are different, so the lengths of the matched sensors are also different, and they need to be matched one by one. Especially during the calibration process, it is necessary to select sensors with corresponding lengths according to the pressure level of the shell. Too many types of sensors will cause a waste of work time.

[0057] In order to solve the above problems, the present application proposes a sensor assembly 100, which is used to be installed on a housing 200 of a measuring instrument 1000. This can at least solve the problem of poor applicability of the sensor 40 in the existing gas turbine 400 flow meter.

[0058] In terms of overall design, the sensor assembly 100 includes a main body, a mounting member 30 and a sensor 40. The main body is used to be mounted on the housing 200. The mounting member 30 is movably arranged on the main body, and the mounting member 30 has a first end 311, and the first end 311 is used to be inserted into the interior of the housing 200. At least part of the sensor 40 is arranged at the first end 311 of the mounting member 30.

[0059] The sensor assembly 100 of the present application, by setting a movable mounting member 30 on the main body, allows the sensor 40 to adjust the insertion depth of the sensor 40 on the shell 200 as the mounting member 30 moves, that is, the distance between the sensor 40 and the turbine 400 can be adjusted, so that the sensor 40 can be matched and installed with the shell 200 of different wall thicknesses, which helps to improve the applicability of the sensor assembly 100, and further can reduce the selection of the length of the sensor 40 when assembling the turbine 400 flowmeter, and can effectively improve the assembly efficiency of the turbine 400 flowmeter.

[0060] Based on the above overall design concept, an exemplary structure of the sensor assembly 100 of this embodiment is as follows: Figure 1-Figure 4 As shown, and at this time, this embodiment also specifically introduces the sensor assembly 100 by taking the turbine 400 flowmeter as an example. The turbine 400 flowmeter includes a housing 200 and a structure to be detected. The structure to be detected is arranged inside the housing 200. When the sensor assembly 100 is installed on the housing 200, the sensor 40 located on the mounting member 30 is inserted into the interior of the housing 200 with the mounting member 30, and is spaced apart from the structure to be detected. In this embodiment, the structure to be detected is the turbine 400, and along the radial direction of the turbine 400, the sensor 40 is spaced apart from the turbine 400. At the same time, the turbine 400 flowmeter also includes a rear guide fluid 300. The rear guide fluid 300 is arranged inside the housing 200, and the turbine 400 is installed on the rear guide fluid 300. When the main body is installed on the housing 200, the first end 311 of the mounting member 30 abuts against the rear guide fluid 300 and the sensor 40 is spaced apart from the turbine 400.

[0061] Specifically, the main body and the housing 200 are fixedly connected. It is understandable that the main body and the housing 200 can be fixed by bolt connection. In this case, a threaded hole is provided on the housing 200, and a through hole is provided on the main body. The housing 200 and the main body can be fixedly connected by bolts passing through the through hole and screwed with the threaded hole. The main body and the housing 200 can also be fixed by a snap-on method. In this embodiment, an internal threaded hole is provided on the housing 200, and an external threaded portion 16 is provided on the main body. The threaded connection between the housing 200 and the main body can be achieved by the cooperation of the internal threaded hole and the external threaded portion 16. The operation is simple and the installation is convenient, which helps to improve the assembly efficiency of the measuring instrument 1000.

[0062] At this time, a first mounting surface 201 is formed on the shell 200, and a second mounting surface 15 is formed on the main body. When the shell 200 is fixedly connected to the main body, the first mounting surface 201 fits with the second mounting surface 15, and at this time, the first mounting surface 201 is the above-mentioned shell sealing end surface. In this embodiment, an insertion hole is provided on the second mounting surface 15, and the above-mentioned mounting member 30 is movably arranged in the insertion hole. Preferably, a first groove 11 is provided on one of the first mounting surface 201 and the second mounting surface 15, and the first groove 11 is an annular groove, and the annular groove and the insertion hole are concentrically arranged. A first sealing member 71 is arranged in the first groove 11, and the first sealing member 71 is a rubber ring. When the first mounting surface 201 and the second mounting surface 15 are fitted and connected, the first sealing member 71 is compressed in the first groove 11 and sandwiched between the first mounting surface 201 and the second mounting surface 15, so as to form a sealing structure. By setting the main body and the shell 200 to be sealed, it helps to avoid fluid leakage when measuring the fluid. At the same time, the first mounting surface 201 and the second mounting surface 15 can cooperate to limit the insertion depth of the sensor assembly 100 on the shell 200, ensuring the safety and standardization of its use.

[0063] like Figure 1 and Figure 3 As shown, the main body includes a first part 10 and a second part 20, wherein the first part 10 is used to be mounted on the housing 200, the second part 20 is mounted on the first part 10, the first part 10 and the second part 20 are connected to each other and form a cavity 101. At the same time, the mounting member 30 has a first end 311 and a second end 312, the first end 311 is arranged outside the main body, and the second end 312 extends into the cavity 101. In this embodiment, the second mounting surface 15 can be arranged on the first part 10, and accordingly, the mounting member 30 can be movably inserted on the first part 10. Of course, in addition to this, the mounting member 30 can also be inserted on the second part 20. By setting the main body as the first part 10 and the second part 20, it is helpful to improve the installation convenience of the sensor assembly 100 and ensure that the mounting member 30 has sufficient moving space. At the same time, it can also provide an accommodation space for the electrical connection between the following electrical connector 91 and the sensor 40 . The above cavity can also accommodate a cable, one end of which is connected to the following electrical connector 91 , and the other end of which is connected to the sensor 40 .

[0064] It is understandable that a receiving space is formed on the first part 10 or the second part 20, and when the first part 10 is fixedly connected to the second part 20, the second part 20 or the first part 10 blocks the receiving space and forms the above-mentioned receiving cavity 101. Receiving grooves may also be provided on both the first part 10 and the second part 20, and when the first part 10 is fixedly connected to the second part 20, the two receiving grooves cooperate to form the receiving cavity 101. In this embodiment, a first receiving groove is formed on the first part 10, and a second receiving groove is formed on the second part 20, and the first receiving groove and the second receiving groove cooperate to form the above-mentioned receiving cavity 101.

[0065] Still Figure 1 As shown, the second part 20 is sleeved on the outer circumference of the first part 10 and fixed by a connecting piece. In this embodiment, a fixing structure 14 is provided on the outer circumference of the first part 10, and the fixing structure 14 can be set as a threaded hole. At the same time, a first mounting hole 21 is opened on the second part 20. By setting a plug-in connector 80 that can pass through the first mounting hole 21 and cooperate with the fixing structure 14, the second part 20 can be fixed on the first part 10. Among them, the plug-in connector 80 can be set as a hexagon socket head set screw. Of course, the plug-in connector 80 can also be set as other threaded connectors.

[0066] At this point, it should be noted that the connection and fixation between the first part 10 and the second part 20 includes but is not limited to the above structure, and may also be fixed by means such as flange connection.

[0067] It can be understood that the first part 10 and the second part 20 are sealed. Specifically, a third groove 13 is provided on the outer circumferential surface of the first part 10, and the third groove 13 is extended along the circumferential direction of the first part 10. A third sealing member 73 is provided in the third groove 13, and in this embodiment, the third sealing member 73 is a rubber ring. The third sealing member 73 is accommodated in the third groove 13, and when the first part 10 and the second part 20 are fixedly connected, it is sandwiched between the outer wall surface of the first part 10 and the inner wall surface of the second part 20. Preferably, the third groove 13 is spaced from the fixed structure 14, and the third groove 13 is closer to the second part 20 than the fixed structure 14. By providing the third groove 13 and the third sealing member 73, the sealed connection between the first part 10 and the second part 20 can be achieved, which helps to reduce the influence of the external environment on the inside of the cavity 101, and thus can effectively reduce the influence of the fluid on the inside of the cavity 101. By limiting the position of the third groove 13 and the fixed structure 14, the sealing effect between the first part 10 and the second part 20 can be further guaranteed.

[0068] Still Figure 1As shown, the mounting member 30 is inserted on the first part 10, the first end 311 of the mounting member 30 is provided with the sensor 40, and the second end 312 of the mounting member 30 extends into the cavity 101. Among them, the mounting member 30 and the first part 10 are sealed. Specifically, a second groove 12 is provided on the outer peripheral surface of the first part 10 or the mounting member 30, and a second sealing member 72 is provided in the second groove 12. In this embodiment, an insertion hole is provided on the first part 10, and a second groove 12 is opened on the inner side surface of the insertion hole to accommodate the second sealing member 72. The second sealing member 72 is a rubber ring. By providing the second sealing member 72 and the second groove 12, when the sensor 40 is inserted into the interior of the housing 200 along with the mounting member 30 and flow detection is performed, the fluid can be effectively prevented from entering the cavity 101 through the mounting member 30.

[0069] At this time, the sensor 40 is detachably arranged inside the mounting member 30, and the sensor 40 has a portion extending outside the first end 311, and the length L of the portion is adjustable. The sensor 40 is set as an inductive sensor 40. Placing the sensor 40 inside the mounting member 30 helps to reduce the impact of the external environment on the sensor 40, and can effectively prevent the housing 200 or other parts from damaging the sensor 40 during the installation process of the main body and the housing 200. At the same time, by limiting the length L of the protruding portion of the sensor 40 to be adjustable, the installer can adjust the length L according to the size of the impeller in the turbine 400 flowmeter.

[0070] Combination Figure 3 and Figure 4 It can be seen that in this embodiment, the turbine 400 is disposed inside the housing 200 of the turbine 400 flowmeter. Since the sensor 40 needs to maintain a certain detection distance with the impeller of the turbine 400, the user can adjust the length of L according to the outer diameter of the turbine 400 and the outer diameter of the back guide fluid 300, which helps to ensure the accuracy of measurement and improve the use effect of the sensor 40.

[0071] It should be further understood that the above-mentioned mounting member 30 is configured in a tubular shape. Figure 2As shown, an internal thread 32 is provided on the inner tube cavity of the mounting member 30 near the first end 311, and an external thread is provided on the outer peripheral surface of the sensor 40, and the sensor 40 is threadedly connected to the mounting member 30 through the external thread and the internal thread 32. In this embodiment, the mounting member 30 includes a tube body 31, and the sensor 40 is threadedly connected to the tube body 31, and is connected to the electrical connector 91 on the second part 20 through a cable passing through the main body. The fixing of the mounting member 30 and the sensor 40 by threaded connection not only helps to improve the sealing effect between the mounting member 30 and the sensor 40, thereby effectively preventing the fluid from entering the above-mentioned cavity 101, but also helps to achieve the adjustable length of the protruding part of the above-mentioned sensor 40, and reduces the difficulty of adjustment, thereby ensuring the assembly efficiency of the sensor assembly 100.

[0072] In this embodiment, the tube body 31 is configured as a circular tube structure. In order to prevent the mounting member 30 from rotating along its circumferential direction, as shown in FIG. Figure 2 As shown, a slot 34 is provided on the outer circumferential surface of the tube body 31, and the slot 34 is extended along the axial direction of the tube body 31. At the same time, an opening is provided on the first part 10. By providing a first stopper 61 that can pass through the opening and be inserted into the slot 34, the circumferential limit of the mounting member 30 can be achieved. As a preferred embodiment, the inner side surface of the opening is provided with a thread, and the first stopper 61 is provided as a set screw with a cone end of the slot 34. The first stopper 61 is screwed with the first part 10 and inserted into the slot 34. During installation, when the first part 10 is fixed to the housing 200, the first stopper 61 can achieve circumferential limit of the first part 10 and the mounting member 30. When the mounting member 30 rotates with the first part 10, the cable connecting the sensor 40 and the electrical connector 91 can be effectively prevented from being knotted and broken.

[0073] It should be noted here that if the above-mentioned tube body 31 is set as a square tube or other types of tubes, and the insertion hole on the first part 10 is connected with the mounting member 30, the mounting member 30 is not easy to rotate in the circumferential direction, but its processing and manufacturing cost, as well as its convenience during assembly are worse than those of the round tube structure.

[0074] It is understandable that the above-mentioned installation member 30 can be movable on the first part 10, which can be manually adjusted by the user according to the product model. Specifically, a plurality of marking structures can be provided on the first part 10, each of which corresponds to a product or a plurality of models of measuring instruments 1000. In addition, the movable structure of the installation member 30 on the first part 10 is an automatic adjustment structure. Specifically, by providing an elastic member 50 or other limiting structures, when the main body is installed on the housing 200, the installation member 30 can be moved on the main body under the action of an external force, and when the main body is installed in place, the sensor assembly 100 has a force to limit the installation member 30 from moving again.

[0075] In this embodiment, the sensor assembly 100 further includes an elastic member 50, wherein the elastic member 50 is sandwiched between the first portion 10 and the mounting member 30. Specifically, the elastic member 50 has a first state and a second state. When the main body is mounted on the housing 200, the elastic member 50 is compressed and in the first state. At this time, the first portion 10 is fixedly connected to the housing 200, and the mounting member 30 abuts against the housing 200 or other components and compresses the elastic member 50. In the first state, the portion of the mounting member 30 extending to the cavity 101 has a first length. In the second state, the portion of the mounting member 30 extending to the cavity 101 has a second length, and the first length is greater than the second length. By arranging the elastic member 50 between the first portion 10 and the mounting member 30, the automatic adjustment of the sensor assembly 100 can be achieved, and sufficient limiting force is ensured on the mounting member 30 to keep the second length unchanged, that is, the mounting member 30 will not move again.

[0076] It should be further understood that the mounting member 30 is provided with an action portion 33, one end of the elastic member 50 abuts against the action portion 33, and the other end of the elastic member 50 abuts against the first portion 10. Figure 1 , Figure 2 and Figure 3 As shown, an action portion 33 is provided at the first end 311 of the tube body 31, and the action portion 33 is a convex column or a convex plate provided on the outer peripheral surface of the mounting member 30, and at this time, one end of the elastic member 50 abuts against the action portion 33, and the other end of the elastic member 50 abuts against the first part 10. In this embodiment, when the first part 10 is fixedly connected to the housing 200, the action portion 33 of the mounting member 30 abuts against the rear guide body 300, and at this time, the action portion 33 receives the reaction force of the rear guide body 300 and compresses the elastic member 50 to form the above-mentioned second length. By providing the action portion 33, it can not only serve as a limiting structure abutting against the rear guide body 300, but also as a limiting structure abutting against the elastic member 50.

[0077] At this time, since the action portion 33 of the mounting member 30 is arranged in abutment with the elastic member 50, when the first part 10 is separated from the housing 200, the mounting member 30 is easily separated from the first part 10. At this time, it can be understood that a second stopper 62 is provided on the portion of the mounting member 30 extending to the cavity 101, and the second stopper 62 can be in abutment with the first part 10 along the moving direction of the mounting member 30. Preferably, the second stopper 62 and the mounting member 30 are detachable structures, which helps to reduce the difficulty of assembling the sensor assembly 100. In addition, if the action portion 33 is fixedly connected to the elastic member 50, and the elastic member 50 is fixed to the first part 10, the problem of the mounting member 30 being separated from the first part 10 is not likely to occur, but its assembly efficiency is poor.

[0078] In this embodiment, the second stopper 62 is arranged on the portion of the mounting member 30 extending to the cavity 101, and in the second state, the second stopper 62 abuts against the first portion 10. Specifically, a mounting groove 35 is provided on the outer circumferential surface of the tube body 31 and close to the second end 312, and the mounting groove 35 is extended along the circumferential surface of the tube body 31. The second stopper 62 is a rigid structure, and the second stopper 62 is accommodated in the mounting groove 35, and can abut against the first portion 10 as the tube body 31 moves, thereby effectively preventing the mounting member 30 from being separated from the first portion 10 under the action of the elastic member 50.

[0079] At this time, it should be noted that when the elastic member 50 is in the second state, the second limit member 62 abuts against the first portion 10, and at this time, the elastic member 50 is either in a natural state or in a compressed state, which is not limited here.

[0080] In addition, an electrical connector 91 is provided on the second portion 20, and the electrical connector 91 is electrically connected to the sensor 40. In this embodiment, the electrical connector 91 is an aviation socket. Figure 1 As shown, the electrical connector 91 and the mounting member 30 are located on the same straight line, which helps to reduce the bending and rotation of the cable, thereby helping to reduce the damage to the cable. At the same time, a resistor 92 is also arranged on the cable.

[0081] In some embodiments of the present application, the electrical connector 91 is sealed and connected to the second portion 20. Specifically, a sealing groove is provided on the second portion 20 or the electrical connector 91, and a fourth sealing member 74 is provided in the sealing groove. Preferably, the sealing groove is provided on the electrical connector 91 and is located on the working surface where the electrical connector 91 abuts against the second portion 20. By providing the second sealing member 72, the influence of the external environment on the cavity 101 can be effectively reduced, thereby affecting the connection between the sensor 40 and the electrical connection.

[0082] The present application also relates to a measuring instrument 1000, comprising the above-mentioned sensor assembly 100, and the measuring instrument 1000 also comprises a housing 200, a rear guide fluid 300 and a turbine 400. The housing 200 is used to transport fluid. A flow cavity is provided inside the housing 200. The rear guide fluid 300 is arranged inside the housing 200, and the turbine 400 is mounted on the rear guide fluid 300, that is, the rear guide fluid 300 and the turbine 400 are both arranged in the flow cavity. When the above-mentioned sensor assembly 100 is arranged on the housing 200, the first end 311 of the mounting member 30 abuts against the rear guide fluid 300, and the sensor 40 and the turbine 400 are arranged at a distance.

[0083] The measuring instrument 1000 of the present application can not only realize the signal collection of the turbine 400 by the sensor 40, but also enable the sensor 40 to adjust the insertion depth on the housing 200 as the mounting member 30 moves, that is, adjust the distance between the sensor 40 and the turbine 400, so that the sensor 40 can be matched and installed with the housing 200 of different wall thicknesses, which helps to reduce the time for selecting the length of the sensor 40 during assembly and helps to improve the assembly efficiency of the turbine 400 flowmeter. In addition, the installation method of the measuring instrument 1000 is simple and reliable, has strong applicability, and has the characteristics of good sealing performance, and will not cause adverse phenomena such as air leakage.

[0084] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model 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 utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A sensor assembly, the sensor assembly being used to be installed on a housing of a measuring instrument, characterized in that: include: A main body, the main body is used to be installed on the shell; A mounting member, the mounting member is movably disposed on the main body, the mounting member has a first end, and the first end is used to be inserted into the interior of the housing; A sensor, at least part of which is disposed at the first end of the mounting member.

2. The sensor assembly according to claim 1, characterized in that The sensor is detachably disposed inside the mounting member, and the length of a portion of the sensor extending out of the first end is adjustable.

3. The sensor assembly according to claim 2, characterized in that The mounting piece is configured to be tubular, an inner tube cavity of the mounting piece close to the first end is provided with an internal thread, an outer peripheral surface of the sensor is provided with an external thread, and the sensor and the mounting piece are threadably connected via the external thread and the internal thread.

4. The sensor assembly according to any one of claims 1 to 3, characterized in that: The outer peripheral surface of the mounting member is provided with a slot, and the slot is extended along the axial direction of the mounting member; the sensor assembly further includes: A first limiting member is passed through the main body and inserted into the slot.

5. The sensor assembly according to claim 4, characterized in that The first end of the mounting member is provided with a limiting structure, and the sensor assembly further comprises: An elastic member, along the axial direction of the mounting member, one end of the elastic member abuts against the limiting structure, and the other end of the elastic member abuts against the main body.

6. The sensor assembly according to claim 1, characterized in that The main body has a cavity, the mounting piece is inserted on the main body, and the second end of the mounting piece extends into the cavity.

7. The sensor assembly according to claim 6, characterized in that The sensor assembly also includes: A second limiting member is provided on a portion of the mounting member extending to the cavity and can abut against an inner wall of the cavity along a moving direction of the mounting member.

8. The sensor assembly according to claim 1, characterized in that The main body is provided with an electrical connector, and the electrical connector is electrically connected to the sensor.

9. A measuring instrument, characterized in that: The sensor assembly according to any one of claims 1 to 8, wherein the measuring instrument further comprises: case; A rear guide fluid, the rear guide fluid is arranged inside the shell; a turbine, the turbine being mounted on the rear guide body; The main body is mounted on the casing, the first end of the mounting member is in contact with the rear guide fluid, and the sensor is spaced apart from the turbine.

10. The measuring instrument according to claim 9, characterized in that A first mounting surface is formed on the shell, a second mounting surface is formed on the main body, the shell is threadedly connected to the main body, and the first mounting surface is fitted with the second mounting surface; The measuring instrument also includes: A first sealing member is sandwiched between the first mounting surface and the second mounting surface.

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