A shock-absorbing float level gauge

Abstract

This invention relates to a shock-absorbing float level gauge, comprising a float chamber, a float, a suspension rope, a lever, a torsion tube, and a sensor. The float is housed within the float chamber and suspended from the torsion tube by the lever. The float and lever are connected by the suspension rope. The sensor is located on the outer top of the float chamber. A shock-absorbing mechanism is provided at the top of the float chamber, and the lever is connected to the shock-absorbing mechanism. This invention, by incorporating a shock-absorbing mechanism at the top of the float chamber, ensures that the lever smoothly transmits its force to the torsion tube when the float experiences momentary oscillations or the force suddenly disappears under fluctuating measurement conditions. This prevents failure of the torsion tube and spindle, and extends the service life of the torsion tube or spindle.

Description

Technical Field

[0001] This invention relates to the field of liquid level measurement device technology, and in particular to a shock-absorbing float level gauge. Background Technology

[0002] The principle of a float level gauge is based on the fact that the float is immersed in the liquid. Depending on the degree of immersion, the buoyant force acting on the float varies. By detecting the change in buoyant force, the liquid level can be determined. The magnitude of the buoyant force is based on Archimedes' principle: an object immersed in a liquid experiences an upward buoyant force equal to the weight of the liquid displaced by the object. The structure of a float level gauge consists of a measuring section and a conversion section. The measuring section comprises the float and a suspension chain. The float is typically a hollow, elongated cylinder made of stainless steel, vertically suspended in the measured medium. Its mass is greater than the weight of an equal volume of liquid, and its center of gravity is lower than its geometric center, ensuring the float remains upright and unaffected by the liquid level. The float experiences minimal displacement during measurement and will not float on the surface. The float is suspended from one end of a lever, the other end of which is vertically connected to one end of a torque tube spindle. The other end of the torque tube is fixed to the instrument housing. A torque tube is a sealed output shaft that isolates the measured medium from the external space. It also utilizes the elastic torsional deformation of the torque tube to convert the torque acting on one end into an angular displacement of the spindle. When the liquid level is zero, the torque exerted on the torque tube by the mass of the float is at its maximum. As the liquid level rises, the buoyancy of the float increases, reducing the torque exerted on the torque tube through the lever, thus decreasing the deformation of the torque tube. At the highest liquid level, the torsion angle is minimal. Through the lever, the float rises slightly, further reducing buoyancy and ultimately achieving torque balance. The change in the torque tube's torsion angle, i.e., the change in the spindle's angular displacement, is directly proportional to the liquid level; the higher the liquid level, the smaller the torsion angle. The transmitter converts this angle into a 4-20mA DC signal, which is proportional to the measured liquid level, thus allowing for the measurement of the liquid level.

[0003] Currently, when using float level gauges to measure liquid levels, the torque tube often fails, and the liquid level measurement results vary significantly after prolonged use. The main reason is that when the liquid level fluctuates greatly or the operating conditions of the equipment being measured are unstable, the instantaneous velocity and acceleration of the float are amplified infinitely, causing a sudden change in the force between the float and the lever. This can easily lead to the failure or even breakage of the torque tube and spindle, and can also damage the sensor.

[0004] Therefore, it is necessary to provide a shock-absorbing float level gauge. Summary of the Invention

[0005] In order to solve the above-mentioned technical problems, the present invention provides a float level gauge with a simple structure and effective anti-vibration buffer that can prevent the failure of the torsion tube, so as to solve at least one of the above-mentioned technical problems.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] A shock-absorbing float level gauge includes a float chamber, a float, a suspension rope, a lever, a torsion tube, and a sensor. The float is disposed in the float chamber and suspended from the torsion tube by the lever. The float and the lever are connected by the suspension rope. The sensor is disposed on the outer top of the float chamber. A shock-absorbing mechanism is disposed on the top of the float chamber, and the lever is connected to the shock-absorbing mechanism.

[0008] The beneficial effects of the present invention are: the present invention provides an anti-vibration buffer mechanism at the top of the pontoon chamber. When the pontoon impacts the lever with instantaneous oscillation or the effect suddenly disappears under the condition of fluctuation in the measurement working conditions, it can ensure that the lever smoothly transmits the effect to the torque tube, prevent the torque tube and the mandrel from failing, and improve the service life of the torque tube or the mandrel.

[0009] Based on the above technical solution, the present invention can be further improved as follows.

[0010] Furthermore, the shock-absorbing mechanism includes:

[0011] The lower end of the base is fixedly connected to the top end of the float chamber;

[0012] A rack, the lower end of which is connected to the lever, and a drive tooth is provided along the length of the rack;

[0013] A main shaft is disposed in the housing, and an amplifying gear is disposed on the main shaft. The amplifying gear is fixedly connected to the main shaft. A driven tooth that meshes with the driving tooth is disposed on the circumferential edge of the amplifying gear. The rack is connected to the amplifying gear through the driving tooth and the driven tooth.

[0014] Dampers are disposed between the two ends of the spindle and the base to provide motion resistance to the spindle and dissipate the motion energy of the spindle.

[0015] The beneficial effects of adopting the above-mentioned further scheme are: the main shaft can convert the linear motion of this line into circular motion, the damper can provide resistance to the rotational motion, ensure that the energy is attenuated when the lever is subjected to oscillation, and can protect the lever and the torsion tube.

[0016] Furthermore, the damper includes:

[0017] A fixed plate, the circumferential edge of which is fixedly connected to the inner sidewall of the base, a damping cavity is provided on the side of the fixed plate away from the main shaft, damping teeth are provided on the inner sidewall of the damping cavity in a clockwise or counterclockwise direction, and a rotating hole is provided at the center of the fixed plate.

[0018] A rotating disk is disposed within the damping cavity, one end of the main shaft passes through the rotating hole and extends into the damping cavity, and the rotating disk is fixedly connected to the main shaft;

[0019] An inertial damping assembly that engages with the damping teeth, wherein the end of the inertial damping assembly away from the damping teeth is connected to the rotating disk hinge.

[0020] The beneficial effect of adopting the above-mentioned further solution is that the inertial damping component, in conjunction with the damping teeth, can provide resistance to the rotation of the rotating disk.

[0021] Furthermore, the main shaft is rotatably connected to the rotating hole via a bearing.

[0022] The beneficial effect of adopting the above-mentioned further solution is that the bearing can ensure more flexible rotation between the spindle and the rotating hole.

[0023] Furthermore, the inertial damping component includes:

[0024] A swinging component, one end of which is rotatably connected to the surface of the rotating disk via a pin, and the other end of which swings under the centrifugal force of the rotating disk and engages with the damping teeth.

[0025] An elastic reset member is disposed between the swing member and the rotating disk.

[0026] The beneficial effects of adopting the above-mentioned further solution are: the end of the swinging member away from the pin can swing under the centrifugal force of the rotating disk and engage with the damping teeth; the elastic reset member can drive the swinging member to reset when the centrifugal force disappears.

[0027] Furthermore, the elastic reset member includes:

[0028] A positioning seat, which is fixed on the rotating disk, and has guide holes provided on it;

[0029] A guide rod, one end of which is fixedly connected to the swing member, and the other end of which is slidably connected to the guide hole;

[0030] A return spring is provided, which is disposed between the guide rod and the positioning seat. One end of the return spring is fixedly connected to the positioning seat, and the other end of the return spring is fixedly connected to the guide rod.

[0031] The beneficial effects of adopting the above-mentioned further solution are: the positioning seat can limit the swing of the swinging component, and the guide rod can guide the swing of the swinging component.

[0032] Furthermore, the swing member has a strip-shaped hole at the end away from the pin, and a guide block is provided at the end of the guide rod away from the positioning seat. One end of the guide block is disposed in the strip-shaped hole and slidably connected to the strip-shaped hole, and the other end of the guide block is fixedly connected to the guide rod.

[0033] The beneficial effect of adopting the above-mentioned further solution is that the strip hole allows the guide rod to adapt to the position of the swinging component, which can ensure that the swinging component swings better.

[0034] Furthermore, the damping tooth has a guide surface and a damping surface. The damping surface extends radially along the fixed disk. The surface of the guide surface is arc-shaped, and a damping protrusion is provided on the surface of the guide surface. A damping groove is provided on the outer side of the end of the swing member away from the pin shaft, which can frictionally engage with the damping protrusion.

[0035] The beneficial effects of adopting the above-mentioned further solution are: the damping convex and damping groove on the guide surface can effectively provide damping by utilizing sliding friction, and can better reduce the rotational energy of the spindle. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the present invention;

[0037] Figure 2 This is a schematic diagram of the anti-vibration buffer mechanism of the present invention;

[0038] Figure 3 This is a schematic diagram of the damper structure of the present invention;

[0039] Figure 4 This is a schematic diagram of the inertial damping component of the present invention.

[0040] The attached diagram lists the components represented by each number as follows:

[0041] 1. Float chamber; 2. Float; 3. Suspension rope; 4. Lever; 5. Anti-vibration buffer mechanism; 6. Base; 7. Rack; 8. Bearing; 9. Damper; 10. Main shaft; 11. Fixed plate; 12. Rotating plate; 13. Damping tooth; 14. Inertia damping assembly; 15. Damping cam; 16. Swinging component; 17. Elastic reset component; 18. Positioning seat; 19. Guide rod; 20. Return spring; 21. Strip hole; 22. Guide block; 23. Damping groove. Detailed Implementation

[0042] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0043] Example

[0044] like Figure 1-4 As shown, this embodiment provides a shock-absorbing float level gauge, including a float chamber 1, a float 2, a suspension rope 3, a lever 4, a torsion tube, and a sensor. The float 2 is disposed inside the float chamber 1 and is suspended from the torsion tube by the lever 4. The float 2 and the lever 4 are connected by the suspension rope 3. The sensor is disposed on the outer side of the top of the float chamber 1. A sensor housing is disposed on the side of the top of the float chamber 1. The torsion tube and the sensor are disposed inside the sensor housing. One end of the lever 4 is connected to the torsion tube, and the other end of the lever 4 extends into the inner top of the float chamber 1 and is connected to the top of the suspension rope 3. A shock-absorbing mechanism 5 is disposed on the top of the float chamber 1, and the lever 4 is connected to the shock-absorbing mechanism 5.

[0045] It should be noted that the existing float level gauge has a drain port and a drain valve at the lower end of the float chamber 1, a liquid inlet on the lower side of the float chamber 1, and an exhaust port on the upper side of the float chamber 1. Both the liquid inlet and the exhaust port are equipped with shut-off valves.

[0046] Preferably, the anti-vibration buffer mechanism 5 includes: a base 6, the lower end of which is fixedly connected to the top of the float chamber 1; a rack 7, the lower end of which is connected to the lever 4, and a drive tooth is provided along the length of the rack 7; a main shaft 10, which is disposed inside the base 6, and an amplifying gear is disposed on the main shaft 10, the amplifying gear is fixedly connected to the main shaft 10, and a driven tooth that meshes with the drive tooth is disposed on the circumferential edge of the amplifying gear, and the rack 7 is connected to the amplifying gear through the drive tooth and the driven tooth; and a damper 9 disposed between the two ends of the main shaft 10 and the base 6 for providing motion resistance to the main shaft 10 and dissipating the motion energy of the main shaft 10.

[0047] It should be noted that the base 6 has an installation chamber, and the bottom of the installation chamber has a through hole that communicates with the top of the float chamber 1. The lower end of the rack 7 passes through the through hole and extends into the float chamber 1, and is fixedly connected to the lever 4. To achieve airtightness, the base 6 is connected to the top of the float chamber 1 by bolts, and a sealing ring is provided between the end faces of the base 6 and the top of the float chamber 1. The installation chamber inside the base 6 is a sealed chamber. In order to convert the linear motion of the rack 7 into the rotational action of the amplifying gear and provide higher speed rotational motion, a speed increaser can be set between the rack 7 and the amplifying gear. The input end of the speed increaser is provided with an input gear that meshes with the rack 7, and the output end of the speed increaser is connected to the amplifying gear through an output gear. The speed increaser can convert the small linear motion of the rack 7 into the circular motion of the main shaft 10 and increase the speed, which can be more conducive to providing higher centrifugal force.

[0048] Preferably, the damper 9 includes: a fixed disk 11, the circumferential edge of which is fixedly connected to the inner wall of the base 6; a damping cavity is provided on the side of the fixed disk 11 away from the main shaft 10; damping teeth 13 are provided on the inner wall of the damping cavity in a clockwise or counterclockwise direction; and a rotating hole is provided at the center of the fixed disk 11; a rotating disk 12, which is disposed in the damping cavity; one end of the main shaft 10 passes through the rotating hole and extends into the damping cavity; and the rotating disk 12 is fixedly connected to the main shaft 10; and an inertial damping assembly 14 that cooperates with the damping teeth 13; the end of the inertial damping assembly 14 away from the damping teeth 13 is hingedly connected to the rotating disk 12.

[0049] Preferably, the spindle 10 is rotatably connected to the rotating hole via the bearing 8.

[0050] Preferably, the inertial damping assembly 14 includes: a swing member 16, one end of which is rotatably connected to the surface of the rotating disk 12 via a pin, and the other end of which swings under the centrifugal force of the rotating disk 12 and abuts against the damping teeth 13; and an elastic reset member 17, which is disposed between the swing member 16 and the rotating disk 12.

[0051] Preferably, the elastic reset member 17 includes: a positioning seat 18, which is fixed on the rotating disk 12 and has a guide hole; a guide rod 19, one end of which is connected to the swing member 16 and the other end of which is slidably connected to the guide hole; and a reset spring 20, which is disposed between the guide rod 19 and the positioning seat 18, one end of which is fixedly connected to the positioning seat 18 and the other end of which is fixedly connected to the guide rod 19.

[0052] It should be noted that the rotating disk 12 rotates with the main shaft 10 under the transmission action of the main shaft 10. The end of the swing member 16 away from the pin shaft swings away from the axis of the rotating disk 12 under the action of centrifugal force, and then cooperates with the damping gear 13 to achieve the function of anti-vibration buffering. It should also be noted that the centrifugal force must overcome the elastic effect of the return spring 20 to drive the swing member 16 to swing. Therefore, it can ensure the normal measurement of liquid level by the torque tube. It can be understood that the fluctuation effect on the float 2 is proportional to the centrifugal force of the rotating disk 12, and the centrifugal force must overcome the elastic effect of the return spring 20. The elastic action causes the swinging member 16 to swing, and the damping teeth 13 limit the swinging member 16. Its reaction force can be transmitted to the rack 7 in the opposite direction, thereby avoiding excessive vibration of the lever 4 and preventing damage to the torque tube or spindle. After the return spring 20 drives the swinging member 16 to return to its original position, the next anti-vibration operation can be performed. It should also be noted that the damping teeth 13 on the inner wall of the fixed plate 11 at the left and right ends of the main shaft 10 extend in opposite directions, and the end of the swinging member 16 away from the pin shaft extends in opposite directions to the damping teeth 13. In this way, whether the main shaft 10 rotates counterclockwise or clockwise, it can play an anti-vibration buffering role through the damper 9.

[0053] Preferably, the swing member 16 has a strip hole 21 at the end away from the pin, and the guide rod 19 has a guide block 22 at the end away from the positioning seat 18. One end of the guide block 22 is disposed in the strip hole 21 and is slidably connected to the strip hole 21, and the other end of the guide block 22 is fixedly connected to the guide rod 19.

[0054] It should be noted that the guide block 22 is cylindrical, and the diameter of the guide block 22 is equal to or less than the width of the strip hole 21. In order to prevent the guide block 22 from slipping out of the strip hole 21, a sliding groove is provided on the inner wall of the opposite side of the strip hole 21, and a guide protrusion that slides in the sliding groove is provided on the side wall of the guide block 22.

[0055] Preferably, the damping tooth 13 has a guide surface and a damping surface. The damping surface extends radially along the fixed disk 11. The surface of the guide surface is arc-shaped, and a damping protrusion 15 is provided on the surface of the guide surface. A damping groove 23 that can rub against the damping protrusion 15 is provided on the outer side of the end of the swing member 16 away from the pin.

[0056] It should be noted that the guide surface is set between two adjacent damping teeth 13, and the guide surface extends arc-shaped from the root of one damping tooth 13 to the top of the other damping tooth 13. The damping protrusion 15 on the surface of the guide surface is semi-cylindrical or hemispherical, and the damping pattern 23 is made of rubber. When the swinging member 16 is subjected to centrifugal force and the swinging member 16 is far from the damping surface of the damping tooth 13, the friction between the damping pattern 23 and the damping protrusion 15 is used to reduce the rotation of the rotating disk 12, which can further improve the energy attenuation during the anti-vibration buffering process.

[0057] In the description of this invention, it should be understood that the terms "center," "length," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "inner," "outer," "circumferential," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0059] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0060] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shock-absorbing and oscillation-damping float level gauge, comprising a float chamber (1), a float (2), a suspension rope (3), a lever (4), a torsion tube and a sensor, wherein the float (2) is arranged in the float chamber (1), the float (2) is suspended on the torsion tube through the lever (4), the float (2) and the lever (4) are connected through the suspension rope (3), and the sensor is arranged outside the top end of the float chamber (1), characterized in that, The top of the pontoon chamber (1) is provided with an anti-oscillation damping mechanism (5), and the lever (4) is connected with the anti-oscillation damping mechanism (5); the anti-oscillation damping mechanism (5) comprises: a seat body (6), the lower end of the seat body (6) is fixedly connected with the top end of the pontoon chamber (1); a rack (7), the lower end of the rack (7) is connected with the lever (4), and the length direction of the rack (7) is provided with driving teeth; a main shaft (10) arranged in the seat body (6), the main shaft (10) is provided with an amplification gear, the amplification gear is fixedly connected with the main shaft (10), the circumferential edge of the amplification gear is provided with driven teeth matched with the driving teeth, and the rack (7) is drivingly connected with the amplification gear through the driving teeth and the driven teeth; a damper (9) arranged between the two ends of the main shaft (10) and the seat body (6) for providing motion resistance to the main shaft (10) and consuming the motion energy of the main shaft (10).

2. A shock-oscillation dampened buoyancy level gauge according to claim 1, characterized in that The damper (9) comprises: a fixed disc (11), the circumferential edge of the fixed disc (11) is fixedly connected with the inner side wall of the seat body (6), the side of the fixed disc (11) away from the main shaft (10) is provided with a damping cavity, the inner side wall of the damping cavity is provided with damping teeth (13) in the clockwise direction or the counterclockwise direction, and the center of the fixed disc (11) is provided with a rotating hole; a rotating disc (12) arranged in the damping cavity, one end of the main shaft (10) penetrates through the rotating hole and extends into the damping cavity, and the rotating disc (12) is fixedly connected with the main shaft (10); an inertia damping assembly (14) matched with the damping teeth (13), one end of the inertia damping assembly (14) away from the damping teeth (13) is hingedly connected with the rotating disc (12).

3. A shock-oscillation dampened buoyancy level gauge according to claim 2, characterized in that The main shaft (10) is rotatably connected with the rotating hole through a bearing (8).

4. A shock-oscillation dampened buoyancy level gauge according to claim 2, characterized in that The inertia damping assembly (14) comprises: a swing piece (16), one end of the swing piece (16) is rotatably connected with the surface of the rotating disc (12) through a pin shaft, the other end of the swing piece (16) swings under the centrifugal force of the rotating disc (12) and abuts and matches with the damping teeth (13); an elastic reset piece (17) arranged between the swing piece (16) and the rotating disc (12).

5. A shock-oscillation dampened buoyancy level gauge according to claim 4, characterized in that The elastic reset piece (17) comprises: a positioning seat (18) fixed on the rotating disc (12), the positioning seat (18) is provided with a guide hole; a guide rod (19), one end of the guide rod (19) is fixedly connected with the swing piece (16), and the other end of the guide rod (19) is slidingly connected with the guide hole; A reset spring (20) is arranged between the guide rod (19) and the positioning seat (18), one end of the reset spring (20) is fixedly connected with the positioning seat (18), and the other end of the reset spring (20) is fixedly connected with the guide rod (19).

6. A shock-oscillation dampened buoyancy level gauge according to claim 5, characterized in that One end of the swing member (16) away from the pin shaft is provided with a strip-shaped hole (21), one end of a guide block (22) arranged on the guide rod (19) away from the positioning seat (18) is arranged in the strip-shaped hole (21) and is in sliding connection with the strip-shaped hole (21), and the other end of the guide block (22) is fixedly connected with the guide rod (19).

7. A shock-oscillation dampened buoyancy level gauge according to claim 4, characterized in that The damping tooth (13) has a guide surface and a damping surface, the damping surface extends along the radial direction of the fixed disc (11), the surface of the guide surface is arc-shaped, a damping convex (15) is arranged on the surface of the guide surface, and the outer side of one end of the swing member (16) away from the pin shaft is provided with a damping pattern (23) capable of being in frictional connection with the damping convex (15).

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