Target oscillation circuit type flow sensor

Abstract

The utility model discloses a target oscillating circuit type flow sensor, which relates to the technical field of target type flow sensors and comprises a flow sensor mechanism and a mounting mechanism. The flow sensor mechanism comprises a sensor target used for making contact with fluid, a main lever fixedly connected to the sensor target, a connecting plate connected to the end, away from the sensor target, of the main lever, and an oscillation module located on the side, away from the main lever, of the connecting plate. The oscillation module comprises an oscillation circuit device connected to the connecting plate through a connector and a clamping block which is adjacent to the oscillation circuit device and is fixedly connected to the connecting plate; the mounting mechanism comprises a transmission box and a jacking assembly, the transmission box is provided with a groove used for mounting the oscillation module, the jacking assembly comprises a limiting rod capable of moving into the groove to tightly jack the oscillation module, through the arrangement of the mounting mechanism, the oscillation circuit device can be limited and mounted, the moving range of the oscillation circuit device is limited, and the reliability of the oscillation circuit device is improved. And the faults of poor linearity, large signal jump and the like in the use process are effectively prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of target flow sensors, and particularly relates to a target oscillation circuit type flow sensor. Background Art

[0002] A target flow sensor is a flow measurement device mainly composed of a target rod, a sensor and a target plate. Its working principle mainly utilizes the impact force generated by the fluid flowing in the measuring tube on the target plate, causing a slight displacement of the target plate. This displacement will cause a change in the resistance value of the resistance strain gauge of the sensor, thereby breaking the balance of the bridge composed of patch capacitors and generating a voltage signal corresponding to the force exerted by the flow on the target plate. After this voltage signal is processed, the corresponding instantaneous flow rate and cumulative total can be obtained. The main characteristics of the target flow sensor are its sturdy structure, no moving parts, safety and reliability, suitability for measuring large-diameter, high and low-pressure media, easy disassembly, no leakage points, high pressure resistance, good repeatability, fast measurement speed, small pressure loss, anti-interference, and basically not affected by impurities in the fluid. In addition, it can also change the range by replacing the flow restrictor (target plate), and the installation is simple and convenient, and it is easy to maintain. However, the target flow sensor also has some disadvantages, such as a relatively complex structure, a large volume, high requirements for the type, cleanliness and phase state of the measured medium, inability to be used in high-temperature and low-temperature working conditions, and may generate relatively large noise and vibration. In addition, zero setting needs to be performed every time it is installed, the accuracy is relatively low, and it cannot be used in working conditions with frequent flow interruption.

[0003] Comprehensive mud logging plays an increasingly important role in the process of oil and gas exploration and development construction. As a result, more and more requirements are put forward for comprehensive mud logging, requiring accurate and immediate accident prediction. Its accuracy and immediacy are inseparable from the performance of the sensor. The target flow sensor is designed according to the measurement method of the target flowmeter, including main components such as a target, a main lever and a potentiometer. The target is connected to the main lever, and the main lever shaft is connected to the shaft of the potentiometer through a mechanical transmission device. During use, there are problems such as poor linearity, large signal jumps, and easy jamming, which bring troubles to our immediate and accurate prediction of major accidents such as well kicks and well leaks. The transformation of the flow sensor is imminent.

[0004] Therefore, it is necessary to design and transform the flow sensor to effectively prevent faults such as poor linearity and large signal jumps during its use. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a target oscillation circuit type flow sensor to effectively prevent faults such as poor linearity and large signal jumps during its use.

[0006] To achieve the above purpose, the utility model provides a target oscillation circuit type flow sensor, including:

[0007] The flow sensor mechanism comprises a sensor target for contacting with a fluid, a main lever fixedly connected to the sensor target, a connecting plate connected to an end of the main lever away from the sensor target, and an oscillating module located on a side of the connecting plate away from the main lever, wherein the oscillating module comprises an oscillating circuit connected to the connecting plate through a connector and a card block adjacent to the oscillating circuit and fixedly connected to the connecting plate;

[0008] The installation mechanism comprises a transmission box and a lifting assembly. The transmission box is provided with a groove for installing the oscillation module. The lifting assembly comprises a limiting rod which can be moved into the groove to tighten the oscillation module.

[0009] Preferably, the transmission box is provided with a accommodating cavity adjacent to the groove, the accommodating cavity and the groove are spaced apart by an isolation plate, and the isolation plate is provided with a first through hole connected to the groove and the accommodating cavity, and the limiting rod can move to the groove along the first through hole.

[0010] Preferably, the oscillating circuit device and the card block have the same cross section perpendicular to the extending direction of the first through hole, and the oscillating circuit device is located on a side of the card block away from the first through hole.

[0011] Preferably, the lifting assembly further comprises:

[0012] A transmission plate is arranged on a side of the limiting rod away from the groove;

[0013] A moving block connected to a side of the transmission plate away from the limiting rod, the moving block comprising an inclined surface, the inclined surface being arranged at an angle to an extending direction of the first through hole;

[0014] The power assembly is provided with an abutment piece which is fitted on the inclined surface. The abutment piece can move along the inclined surface to drive the moving block, the transmission plate and the limiting rod to move along the extending direction of the first through hole.

[0015] Preferably, the power assembly comprises:

[0016] A power source is arranged in the accommodating cavity;

[0017] The transmission mechanism includes a first bevel gear connected to the output end of the power source, a second bevel gear connected to the first bevel gear, a screw rod penetrating the second bevel gear and capable of rotating synchronously with the second bevel gear, and a transmission block movably sleeved on the screw rod and connected to the abutment member, the screw rod penetrating the transmission box, and a bearing is provided between the screw rod and the transmission box.

[0018] Preferably, a groove is provided on the inclined surface, and the bottom surface of the groove is parallel to the inclined surface.

[0019] Preferably, a second through hole is opened on the transmission block, a guide rod is passed through the second through hole, and both ends of the guide rod are fixed to the transmission box, and the axis of the guide rod and the axis of the screw are parallel to each other, so that the transmission block moves axially along the guide rod driven by the screw.

[0020] Preferably, the abutment member is a roller adapted to the groove, and two parallel vertical plates are provided at the end of the transmission block away from the screw rod. A third through hole for installing the rotating shaft is opened on the two vertical plates, and the rotating shaft passes through the roller so that the roller can roll along the bottom surface of the groove.

[0021] Preferably, the limiting rod and the first through hole extend in the same direction, and the cross-sectional area of the limiting rod perpendicular to the extending direction of the first through hole is smaller than the cross-sectional area of the first through hole perpendicular to its own extending direction;

[0022] The length of the transmission plate in the extending direction of the screw rod is consistent with the width of the accommodating cavity in the extending direction of the screw rod.

[0023] Preferably, the outer wall of the transmission case is provided with an anti-rust coating.

[0024] With respect to the above-mentioned background technology, the target-type oscillation circuit flow sensor provided by the utility model includes a flow sensor mechanism and an installation mechanism, the flow sensor mechanism includes a sensor target for contacting with the fluid, a main lever fixedly connected to the sensor target, a connecting plate connected to the end of the main lever away from the sensor target, and an oscillation module located on the side of the connecting plate away from the main lever, the oscillation module includes an oscillation circuit connected to the connecting plate through a connector and a clamping block adjacent to the oscillation circuit and fixedly connected to the connecting plate; the installation mechanism includes a transmission box and a lifting assembly, the transmission box is provided with a groove for installing the oscillation module, and the lifting assembly includes a limiting rod that can be moved into the groove to tighten the oscillation module.

[0025] Specifically, the impact force generated by the fluid flowing in the measuring tube on the sensor target is used to cause the sensor target to produce a slight displacement. The slight movement of the sensor target is transmitted to the oscillation circuit through the main lever. The transmission box is provided with a groove for installing the oscillation module, and the jacking assembly presses the oscillation module tightly by moving the limit rod inside the groove. Through the setting of the installation mechanism, the oscillation circuit can be installed with a limit position, which limits the movement range of the oscillation circuit and effectively prevents faults such as poor linearity and large signal jumps during its use. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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 in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 Structural schematic diagram of the flow sensor mechanism provided by the embodiment of the present utility model;

[0028] Figure 2 Structural schematic diagram of the flow sensor mechanism provided by the embodiment of the present utility model from another perspective;

[0029] Figure 3 Cross-sectional view of the transmission box provided by the embodiment of the present utility model;

[0030] Figure 4 Cross-sectional view of the transmission box from another perspective provided by the embodiment of the present utility model.

[0031] Wherein: 1 - flow sensor mechanism, 11 - sensor target, 12 - main lever, 13 - connecting plate, 14 - connector, 15 - oscillation circuit device, 16 - clamping block, 2 - mounting mechanism, 21 - transmission box, 22 - power source, 23 - first bevel gear, 24 - second bevel gear, 25 - screw, 26 - transmission block, 27 - vertical plate, 28 - moving block, 29 - transmission plate, 210 - limiting rod, 3 - fixing plate, 4 - guide rod, 5 - first through hole, 6 - anti-rust coating. Detailed implementation manners

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0033] In order to enable those skilled in the art in the technical field to better understand the solution of the present utility model, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0034] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "top", "bottom", "left", "right", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model.

[0035] The purpose of the present utility model is to provide a target oscillation circuit type flow sensor, which can effectively prevent faults such as poor linearity and large signal jumps during its use.

[0036] Please refer to Figures 1 to 4, To achieve the above object, the present utility model provides a target-type oscillating circuit flow sensor, which includes a flow sensor mechanism 1 and a mounting mechanism 2.

[0037] The flow sensor mechanism 1 includes a sensor target 11 for contacting with the fluid, a main lever 12 fixedly connected to the sensor target 11, a connecting plate 13 connected to one end of the main lever 12 away from the sensor target 11, and an oscillation module located on the side of the connecting plate 13 away from the main lever 12. The oscillation module includes an oscillation circuit device 15 connected to the connecting plate 13 through a connector 14 and a clamping block 16 adjacent to the oscillation circuit device 15 and fixedly connected to the connecting plate 13.

[0038] Among them, both the clamping block 16 and the oscillation module are rectangular structures, and the clamping block 16 is fixedly connected to the connecting plate 13 through an engaging block. A connector 14 is fixedly connected to the right side of the connecting plate 13, and an oscillation circuit device 15 is clamped to the right side of the connector 14.

[0039] The mounting mechanism 2 includes a transmission box 21 and a lifting assembly. The transmission box 21 is provided with a groove for mounting the oscillation module. The lifting assembly includes a limiting rod 210 that can move into the groove to tightly press the oscillation module. It should be noted that the groove is slightly larger than the oscillation module so that the oscillation module can be smoothly installed in the groove. The groove can adopt a rectangular groove matching the outer shape of the oscillation module.

[0040] By using the impact force generated by the fluid flowing in the measuring pipe on the sensor target 11, the sensor target 11 generates a slight displacement. The slight movement of the sensor target 11 is transmitted to the oscillation circuit device 15 through the main lever 12. The transmission box 21 is provided with a groove for mounting the oscillation module, and the lifting assembly tightly presses the oscillation module through the limiting rod 210 that moves into the groove. Through the setting of the mounting mechanism 2, the oscillation circuit device 15 can be limited and installed, restricting the movement range of the oscillation circuit device 15 and effectively preventing faults such as poor linearity and large signal jumps during its use.

[0041] In this embodiment, the transmission box 21 is provided with a receiving cavity adjacent to the groove. The receiving cavity and the groove are separated by a partition plate, and the partition plate is provided with a first through hole 5 communicating with the groove and the receiving cavity. The limiting rod 210 is movably arranged in the receiving cavity and can move into the groove along the first through hole 5.

[0042] Among them, the cross-sections of the oscillation circuit device 15 and the clamping block 16 perpendicular to the extending direction of the first through hole 5 are the same, and the oscillation circuit device 15 is located on the side of the clamping block 16 away from the first through hole 5, so that when the limiting rod 210 moves into the groove along the first through hole 5, it can contact the clamping block 16, and then the position of the oscillation circuit device 15 is limited through the clamping block 16 adjacent to the oscillation circuit device 15, avoiding too large a space for the oscillation circuit device 15 to swing.

[0043] In some embodiments, the jacking assembly further includes a transmission plate 29, a moving block 28, and a power assembly. The transmission plate 29 is a plate-like structure and is disposed on the side of the limiting rod 210 away from the groove. The transmission plate 29 and the limiting rod 210 can be fixed by bolts so that the transmission plate 29 and the limiting rod 210 can move synchronously. The moving block 28 is connected to the side of the transmission plate 29 away from the limiting rod 210. The moving block 28 includes an inclined surface, and the inclined surface is disposed at an angle to the extending direction of the first through hole 5, and the inclined surface is located on the side of the moving block 28 away from the transmission plate 29. The power assembly is provided with an abutting member that abuts against the inclined surface, and the abutting member can move along the inclined surface. By restricting the movement of the abutting member, the inclined surface drives the moving block 28, the transmission plate 29, and the limiting rod 210 to move along the extending direction of the first through hole 5 under the pressure of the abutting member.

[0044] Among them, the power assembly includes a power source 22 and a transmission mechanism. The power source 22 is disposed in the accommodating cavity. The power source 22 can be a motor, etc. To prevent the single-point support of the motor from being unstable enough, a fixing plate 3 connected to the inner wall of the transmission box 21 and the motor is provided to assist in supporting the motor and avoid large shaking of the motor during operation.

[0045] The transmission mechanism includes a first bevel gear 23 connected to the output end of the power source 22, a second bevel gear 24 connected to the first bevel gear 23, a screw rod 25 passing through the second bevel gear 24 and capable of rotating synchronously with the second bevel gear 24, and a transmission block 26 movably sleeved on the screw rod 25 and connected to the abutting member. The screw rod 25 passes through the transmission box 21, and a bearing is provided between the screw rod 25 and the transmission box 21. The bearing enables the screw rod 25 to only rotate around its own axis relative to the transmission box 21 while reducing the wear of the screw rod 25 during rotation and increasing the service life of the screw rod 25 and the transmission box 21.

[0046] It can be understood that the first bevel gear 23 and the second bevel gear 24 can mesh with each other, and the power at the output end of the power source 22 is converted into the synchronous rotation of the second bevel gear 24 and the screw rod 25 through the first bevel gear 23. Considering that the screw rod 25 only needs to drive the transmission block 26 thereon to achieve a linear motion along the axial direction of the screw rod 25, a second through hole is formed in the transmission block 26, the guide rod 4 passes through the second through hole, and both ends of the guide rod 4 are fixed to the transmission box 21. The axis of the guide rod 4 and the axis of the screw rod 25 are parallel to each other, so that the transmission block 26 moves along the extending direction of the guide rod 4 under the drive of the screw rod 25.

[0047] In another embodiment, the power assembly can be considered to be set as a lifting structure. The fixed end of the lifting mechanism is fixed to the transmission box 21, and the movable end of the lifting mechanism is connected to the above-mentioned abutting member. By the telescopic movement of the movable end, the contact point position between the abutting member and the inclined surface is changed, thereby driving the moving block 28, the transmission plate 29, and the limiting rod 210 to move along the extending direction of the first through hole 5.

[0048] Preferably, a groove is formed on the inclined surface, and the bottom surface of the groove is parallel to the inclined surface. The abutting member is a roller adapted to the groove. At one end of the transmission block 26 away from the screw 25, two parallel vertical plates 27 are provided. Third through holes for installing a rotating shaft are formed on the two vertical plates 27. The rotating shaft penetrates through the roller so that the roller can roll along the bottom surface of the groove.

[0049] Since the bottom surface of the groove is parallel to the inclined surface, when the roller moves along the bottom surface of the groove, the moving block 28, the transmission plate 29 and the limiting rod 210 are always linearly changed when moving along the extending direction of the first through hole 5. By setting the abutting member as a roller that can rotate relative to the groove and the transmission block 26, the friction during the movement of the moving block 28 can be reduced, the service life of the abutting member and the moving block 28 can be increased, and the displacement accuracy of the limiting rod 210 can be ensured.

[0050] It should be noted that preferably, the extending direction of the limiting rod 210 is consistent with that of the first through hole 5, and the cross-sectional area of the limiting rod 210 perpendicular to the extending direction of the first through hole 5 is smaller than the cross-sectional area of the first through hole 5 perpendicular to its own extending direction; the first through hole 5 is preferably a square opening, and the limiting rod 210 is preferably a square column. The length of the transmission plate 29 in the extending direction of the screw 25 is the same as the width of the accommodating cavity in the extending direction of the screw 25 to limit the lateral movement (axial direction of the screw 25) of the moving block 28 and the transmission plate 29 in the accommodating cavity, ensuring that the moving block 28, the transmission plate 29 and the limiting member can only move along the extending direction of the first through hole 5. At the same time, through the setting of the square opening, the limiting rod 210 can completely pass through the square opening for mechanical transmission, avoiding the phenomenon that the limiting rod 210 is stuck at the square opening due to the too narrow width of the square opening. In addition, an anti-rust coating 6 is provided on the outer wall of the transmission box 21 in this embodiment to protect the transmission box 21 and improve the service life of the transmission box 21.

[0051] This target flow sensor improves the accuracy of the flow sensor and extends the service life of the flow sensor by adding functions, enabling it to have the effect of increasing the working efficiency of the flow sensor, preventing faults such as poor linearity, large signal jumps, and easy jamming during use, and solving the problems of poor linearity, large signal jumps, and easy jamming during use.

[0052] It should be noted that in this specification, relational terms such as first and second are only used to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0053] In this specification, the various embodiments are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. For the same or similar parts among the various embodiments, reference can be made to each other.

[0054] Specific examples are used herein to elaborate on the principles and implementation manners of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present utility model, several improvements and modifications can be made to the present utility model, and these improvements and modifications also fall within the protection scope of the present utility model.

Claims

1. A target oscillating circuit type flow sensor, characterized in that, Comprising: A flow sensor mechanism, including a sensor target for contacting with a fluid, a main lever fixedly connected to the sensor target, a connecting plate connected to an end of the main lever away from the sensor target, and an oscillation module located on a side of the connecting plate away from the main lever. The oscillation module includes an oscillation circuit device connected to the connecting plate through a connector and a block adjacent to the oscillation circuit device and fixedly connected to the connecting plate; An installation mechanism, including a transmission box and a jacking assembly. The transmission box is provided with a groove for installing the oscillation module, and the jacking assembly includes a limiting rod capable of moving into the groove to tightly press the oscillation module.

2. The target oscillation circuit type flow sensor according to claim 1, characterized in that, The transmission box is provided with a receiving cavity adjacent to the groove. The receiving cavity and the groove are spaced apart by a partition plate, and the partition plate is provided with a first through hole communicating with the groove and the receiving cavity. The limiting rod can move along the first through hole into the groove.

3. The target type oscillating circuit flow sensor according to claim 2, characterized in that, The cross-section of the oscillation circuit device and the block perpendicular to the extending direction of the first through hole is the same, and the oscillation circuit device is located on a side of the block away from the first through hole.

4. The target oscillating circuit type flow sensor according to claim 2, characterized in that, The jacking assembly further includes: A transmission plate disposed on a side of the limiting rod away from the groove; A moving block connected to a side of the transmission plate away from the limiting rod. The moving block includes an inclined surface, and the inclined surface is arranged at an angle with the extending direction of the first through hole; A power assembly provided with an abutting member fitting on the inclined surface. The abutting member can move along the inclined surface to drive the moving block, the transmission plate, and the limiting rod to move along the extending direction of the first through hole.

5. The target oscillation circuit type flow sensor according to claim 4, characterized in that, The power assembly includes: A power source disposed in the receiving cavity; A transmission mechanism, including a first bevel gear connected to an output end of the power source, a second bevel gear connected to the first bevel gear, a screw rod passing through the second bevel gear and capable of rotating synchronously with the second bevel gear, and a transmission block movably sleeved on the screw rod and connected to the abutting member. The screw rod passes through the transmission box, and a bearing is provided between the screw rod and the transmission box.

6. The target oscillating circuit type flow sensor according to claim 5, characterized in that, A groove is formed on the inclined surface, and the bottom surface of the groove is parallel to the inclined surface.

7. The target oscillating circuit type flow sensor according to claim 5, characterized in that, A second through hole is formed on the transmission block, and a guide rod passes through the second through hole. Both ends of the guide rod are fixed to the transmission box. The axis of the guide rod and the axis of the screw rod are parallel to each other, so that the transmission block moves along the axial direction of the guide rod under the drive of the screw rod.

8. The target oscillation circuit type flow sensor according to claim 6, characterized in that, The abutting member is a roller adapted to the groove. Two parallel vertical plates are provided at an end of the transmission block away from the screw rod. Third through holes for installing a rotating shaft are formed on the two vertical plates. The rotating shaft passes through the roller, so that the roller can roll along the bottom surface of the groove.

9. The target oscillating circuit type flow sensor according to claim 5, characterized in that, The extending direction of the limiting rod is the same as that of the first through hole, and the cross-sectional area of the limiting rod perpendicular to the extending direction of the first through hole is smaller than the cross-sectional area of the first through hole perpendicular to its own extending direction; The length of the transmission plate in the extending direction of the screw rod is the same as the width of the receiving cavity in the extending direction of the screw rod.

10. The target oscillating circuit type flow sensor according to any one of claims 1 to 9, characterized in that, The outer wall of the transmission case is provided with an anti-rust coating.

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