Floating ball fixing tool and calibration equipment of magnetostrictive liquid level meter

Abstract

The utility model discloses a magnetostrictive liquid level meter floating ball fixing tool and calibration equipment, the magnetostrictive liquid level meter comprises a guide rod and a floating ball capable of sliding along the guide rod, and the floating ball fixing tool comprises a limiting seat used for being connected with the end portion of the guide rod; the first telescopic mechanism is arranged on the limiting seat, and the first telescopic mechanism comprises a first telescopic end capable of moving in the first direction; the ejector pin is arranged at the first telescopic end and points to the limiting base, and a pressing end used for making contact with the floating ball is arranged at the end, facing the limiting base, of the ejector pin; wherein the first direction is parallel to the extension direction of the guide rod. According to the floating ball fixing tool, the floating ball of the magnetostriction liquid level meter can be limited to the relative zero position, zero position deviation caused by craters is avoided, follow-up accurate detection of the position of the relative zero position is facilitated, the neutral position and the full position are obtained through calculation based on the relative zero position and the measuring range, the accuracy of the calibration position is guaranteed, and the requirement for high-precision measurement is met.

Description

Technical Field

[0001] This utility model belongs to the technical field of magnetostrictive level gauges, specifically relating to a float fixing fixture for a magnetostrictive level gauge. Background Technology

[0002] A magnetostrictive level gauge is a high-precision sensor that uses the magnetostrictive principle to measure the position of liquid or solid materials. Its working principle is to determine the position of the float by the torsional wave generated when the magnetic field of the magnetostrictive waveguide meets the permanent magnet of the float, thereby calculating the material level.

[0003] Calibration of a magnetostrictive level gauge is a crucial step in ensuring its measurement accuracy and reliability. During calibration, the float needs to be calibrated at the zero, intermediate, and full positions of the guide rod. However, the presence of protruding weld marks at the end of the guide rod's stop plate can prevent the float from fully moving to the zero position, causing a zero-position deviation. This affects the accuracy of the calibration measurement, making it difficult to guarantee the consistency between the calibration and measurement of the magnetostrictive level gauge and the measurement itself, thus failing to meet high-precision requirements. Utility Model Content

[0004] The purpose of this application is to provide a float fixing fixture for a magnetostrictive level gauge, so as to solve the technical problem in the prior art that the float cannot be completely moved to the zero position due to the presence of weld scars at the stop plate at the end of the guide rod, resulting in zero position deviation and affecting the accuracy of calibration measurement.

[0005] To achieve the above objectives, this application provides a float fixing fixture for a magnetostrictive level gauge, the magnetostrictive level gauge including a guide rod and a float that can slide along the guide rod, the float fixing fixture including:

[0006] A limiting seat is used to connect to the end of the guide rod;

[0007] A first telescopic mechanism is arranged on the limiting seat, and the first telescopic mechanism includes a first telescopic end that can move in a first direction;

[0008] A push pin is arranged on the first telescopic end, the push pin is positioned towards the limiting seat, and the end of the push pin facing the limiting seat is provided with a pressing end for contacting the float.

[0009] The first direction is parallel to the extension direction of the guide rod.

[0010] In one or more embodiments, a second telescopic mechanism is further included, which is disposed on the first telescopic end and includes a second telescopic end that is movable in a second direction;

[0011] Wherein, the second direction is perpendicular to the first direction, and the ejector pin is arranged at the second telescopic end.

[0012] In one or more embodiments, the first telescopic mechanism and / or the second telescopic mechanism is a cylinder.

[0013] In one or more embodiments, a bracket is further included, the bracket being arranged on the second telescopic end, and the end of the bracket in the second direction is provided with a clearance opening that matches the guide rod;

[0014] The ejector pin is positioned next to the clearance opening.

[0015] In one or more embodiments, a pair of pins are symmetrically arranged on both sides of the notch.

[0016] In one or more embodiments, the bracket is an L-shaped bracket, and the bracket includes a first side extending along the first direction and a second side extending along the second direction, the first side being connected to the second telescopic end, and the clearance opening being arranged at the middle of the outer end of the second side.

[0017] In one or more embodiments, the bracket is provided with an opening that matches the ejector pin, the ejector pin passes through the opening, the side of the bracket is provided with a mounting hole, and a limiting bolt is provided in the mounting hole for abutting against the ejector pin to fix the ejector pin.

[0018] In one or more embodiments, the limiting seat includes a base and a limiting plate disposed on the base, the limiting plate being provided with a limiting groove that matches the end of the guide rod;

[0019] The first telescopic mechanism is arranged on the side of the limiting plate facing the float.

[0020] In one or more embodiments, the ejector pin is a spring push rod.

[0021] To achieve the above objectives, a second aspect of this application provides a calibration device for a magnetostrictive level gauge, including the float fixing fixture described in any of the above embodiments.

[0022] The advantages of this application, which differ from existing technologies, are:

[0023] The float fixing fixture of this application can limit the float of the magnetostrictive level gauge to the relative zero position, avoid zero position deviation caused by weld spatter, help to accurately detect the position of the relative zero position in the future, and calculate the middle position and full position based on the relative zero position and the range, ensuring the accuracy of the calibration position and meeting the needs of high-precision measurement. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of zero-position deviation in the existing technology;

[0026] Figure 2 This is a schematic diagram of one embodiment of the float fixing fixture for the magnetostrictive level gauge of this application.

[0027] As shown in the figure:

[0028] 10 floats;

[0029] 20 weld spatters;

[0030] Absolute zero: 30;

[0031] Relative zero: 40;

[0032] Zero deviation 50;

[0033] Guide rod 60;

[0034] Limiting seat 70; base 701; limiting plate 702; limiting groove 703;

[0035] First telescopic mechanism 80; First telescopic end 801;

[0036] Second telescopic mechanism 90; Second telescopic end 901;

[0037] 100 thimbles;

[0038] Bracket 110; Notch 1101; First side 1102; Second side 1103; Opening 1104; Mounting hole 1105; Limit bolt 1106. Detailed Implementation

[0039] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of this utility model.

[0040] Please see Figure 1 , Figure 1 This is a schematic diagram of zero-point deviation in the prior art. When calibrating a magnetostrictive level gauge, the float 10 often fails to move to the absolute zero position 30 due to the weld scar 20, resulting in a zero-point deviation of 50. However, the absolute zero position 30 is still used as the origin of the float 10 during calibration, and the mid-level and full-level are calculated based on the absolute zero position 30, which leads to poor calibration accuracy and affects the accuracy of subsequent measurements.

[0041] Due to the presence of weld scar 20, float 10 cannot move to absolute zero 30. At this time, the actual moving end point of float 10 is relative zero 40. Zero deviation 50 will affect the accuracy of calibration measurement, making it difficult to ensure the consistency of calibration and measurement before and after the magnetostrictive level gauge, and failing to meet the high precision requirements.

[0042] To address the aforementioned issues, the applicant has developed a float fixing fixture for a magnetostrictive level gauge. This fixture can limit the float 10 to a relative zero position 40 at the end of the guide rod 60. By detecting this relative zero position 40, the mid-level and full-level positions can be calculated, ensuring positional accuracy. This helps to ensure the accuracy of calibration measurements during subsequent calibration processes, guaranteeing consistency between calibration and measurement of the magnetostrictive level gauge before and after calibration, and meeting high-precision requirements.

[0043] Specifically, please refer to Figure 2 , Figure 2 This is a schematic diagram of one embodiment of the float fixing fixture for the magnetostrictive level gauge of this application.

[0044] like Figure 2 As shown, the float fixing fixture includes a limiting seat 70, which is used to connect to the end of the guide rod 60 of the magnetostrictive level gauge.

[0045] In this embodiment, the limiting seat 70 may include a base 701 and a limiting plate 702 disposed on the base 701, wherein the limiting plate 702 is provided with a limiting groove 703 that matches the end of the guide rod 60. The end of the guide rod 60 can be embedded in the limiting groove 703 to realize the connection between the limiting seat 70 and the guide rod 60.

[0046] In other embodiments, the limiting seat 70 can also be connected to the end of the guide rod 60 in other ways, such as clamping, interference fit, etc., all of which can achieve the effect of this embodiment.

[0047] The limiting plate 702 has a first telescopic mechanism 80 on the side facing the float 10. The first telescopic mechanism 80 includes a first telescopic end 801 that can move along the first direction x.

[0048] The first direction x is parallel to the extension direction of the guide rod 60.

[0049] A second telescopic mechanism 90 is arranged on the first telescopic end 801. The second telescopic mechanism 90 includes the second telescopic end 901, which can move along the second direction z.

[0050] The second direction z is perpendicular to the first direction x.

[0051] A pin 100 is arranged on the second telescopic end 901. The pin 100 is positioned in front of the limiting seat 70, and the end of the pin 100 is provided with a pressing end for contacting the float 10.

[0052] Understandably, when the end of the guide rod 60 is installed on the limiting seat 70, and it is necessary to press and limit the float 10 to the end of the guide rod 60, the ejector pin 100 can be adjusted to the side of the float 10 away from the end of the guide rod 60 through the first telescopic mechanism 80, and then the ejector pin 100 can be adjusted to the height corresponding to the float 10 through the second telescopic mechanism 90. Then, the ejector pin 100 can be controlled by the first telescopic mechanism 80 to press and limit the float 10 to the end of the guide rod 60. At this time, the float 10 is limited to the relative zero position 40. By detecting the relative zero position 40, the influence of the weld scar 20 on the positional accuracy can be avoided.

[0053] Specifically, after the relative zero position 40 is detected, the sum of the relative zero position 40 and the range can be used as the full position, and half of the sum of the relative zero position 40 and the range can be used as the mid position, so that the float 10 can be moved to the corresponding position for calibration in subsequent calibration.

[0054] It should be noted that in this embodiment, the function of the second telescopic end 901 is to adjust the ejector pin 100 to the same height as the float 10. In other embodiments, the second telescopic end 901 can be omitted, and the ejector pin 100 can be fixed at the same height as the float 10. Before measurement, the float 10 can be adjusted to a position close to the end of the guide rod 60, which can also achieve the effect of this embodiment.

[0055] In this embodiment, the first telescopic mechanism 80 and the second telescopic mechanism 90 can be cylinders. In other embodiments, any telescopic element commonly used in the art can also be used to achieve the effect of this embodiment.

[0056] In order to avoid excessive pressure on the float 10 by the ejector pin 100, which could damage the float 10, the ejector pin 100 is a spring push rod in this embodiment. The second telescopic mechanism 90 presses the ejector pin 100 onto the float 10 to compress the ejector pin 100. The spring force presses the float 10 onto the end of the guide rod 60 to achieve the limiting of the float 10.

[0057] In order to ensure the stability of the float 10 when it is pressed and limited, in this embodiment, the second telescopic end 901 of the second telescopic mechanism 90 is also provided with a bracket 110. The top of the bracket 110 is provided with a notch 1101 that matches the guide rod 60, so that the bracket 110 can rise to the position where the top of the bracket 110 is flush with the float 10.

[0058] Furthermore, in order to ensure that the float 10 is subjected to balanced forces on both sides, the tooling in this embodiment includes a pair of pins 100 fixed to the top of the bracket 110, and the pair of pins 100 are symmetrically arranged on both sides of the notch 1101, so that both ends of the float 10 are pressed at the same time to ensure its stability.

[0059] Specifically, in this embodiment, the bracket 110 is an L-shaped bracket 110, and the bracket 110 includes a first side 1102 extending along a first direction and a second side 1103 extending along a second direction. The first side 1102 is connected to the second telescopic end 901, and the clearance is arranged in the middle of the outer end of the second side 1103.

[0060] Different models of magnetostrictive level gauges may include floats 10 of different lengths. In order to match the fixing of floats 10 of different lengths, in this embodiment, the bracket 110 is provided with an opening 1104 that matches the ejector pin 100. The ejector pin 100 is disposed through the opening 1104. The side of the bracket 110 is provided with a mounting hole 1105. A limiting bolt 1106 is provided in the mounting hole 1105 for abutting against the ejector pin 100 to fix the ejector pin 100.

[0061] Based on the above design, the length of the pin 100 penetrating the bracket 110 can be adjusted by using the limiting bolt 1106, thereby meeting the needs of different scenarios.

[0062] Based on the above embodiments, the float 10 fixing fixture can limit the float 10 of the magnetostrictive level gauge to the relative zero position 40, avoiding the zero position deviation 50 caused by the weld scar 20. This helps to accurately detect the position of the relative zero position 40 in the future, and calculate the middle position and full position based on the relative zero position 40 and the range, ensuring the accuracy of the calibration position and meeting the requirements of high-precision measurement.

[0063] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0064] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bob fixing tool for a magnetostrictive liquid level meter including a guide rod and a bob slidable along the guide rod, characterized by, The floating ball fixing tool comprises: a limiting seat for connecting with an end of the guide rod; a first telescopic mechanism arranged on the limiting seat, the first telescopic mechanism comprising a first telescopic end movable in a first direction; a thimble arranged on the first telescopic end, the thimble pointing to the limiting seat and being provided with a pressing end for contacting the floating ball at one end facing the limiting seat; wherein the first direction is parallel to the extending direction of the guide rod.

2. The floating ball fixture of claim 1, wherein, a second telescopic mechanism arranged on the first telescopic end, the second telescopic mechanism comprising a second telescopic end movable in a second direction; wherein the second direction is perpendicular to the first direction, and the thimble is arranged on the second telescopic end.

3. The floating ball fixture of claim 2, wherein, The first telescopic mechanism and / or the second telescopic mechanism is a pneumatic cylinder.

4. The floating ball fixture of claim 2, wherein, a bracket arranged on the second telescopic end, and an avoiding opening matched with the guide rod arranged at an end of the bracket in the second direction; wherein the thimble is arranged beside the avoiding opening.

5. The floating ball fixture of claim 4, wherein, a pair of thimbles symmetrically arranged on both sides of the avoiding opening.

6. The floating ball fixture of claim 4, wherein, The bracket is an L-shaped bracket, and the bracket comprises a first side edge extending in the first direction and a second side edge extending in the second direction, the first side edge being connected with the second telescopic end, and the avoiding opening being arranged in the middle of the outer end of the second side edge.

7. The floating ball fixture of claim 4, wherein, The bracket is provided with an opening matched with the thimble, the thimble penetrating through the opening, and the bracket is provided with a mounting hole on the side surface, and a limiting bolt for abutting against the thimble to fix the thimble is arranged in the mounting hole.

8. The floating ball fixture of claim 1, wherein, The limiting seat comprises a base and a limiting plate arranged on the base, and the limiting plate is provided with a limiting groove matched with the end of the guide rod; wherein the first telescopic mechanism is arranged on the side of the limiting plate facing the floating ball.

9. The floating ball fixture of claim 1, wherein, The thimble is a spring push rod.

10. A calibration device for magnetostrictive liquid level gauges, characterized in that The floating ball fixing tool according to any one of claims 1 to 9. The floating ball fixing tool according to any one of claims 1 to 9.

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