Clamp preload detection system and method

Abstract

The present invention relates to a clamp preload detection system and method, wherein the detection system comprises a first semi-shaft, a second semi-shaft, a first detection device, a second detection device and a control device, wherein the first semi-shaft and the second semi-shaft are arranged opposite to each other, and in a first direction, there is a gap between the first semi-shaft and the second semi-shaft; the first detection device is configured to detect the force applied to the first semi-shaft when the clamp to be tested is sleeved on the periphery of the first semi-shaft and the second semi-shaft; the second detection device is configured to detect the force applied to the second semi-shaft when the clamp to be tested is sleeved on the periphery of the first semi-shaft and the second semi-shaft; the control device is connected to the first detection device and the second detection device by signals, and the control device is configured to calculate the preload applied by the clamp to be tested to the first semi-shaft and the second semi-shaft according to the detection results of the first detection device and the second detection device. The present invention can realize the detection of the clamp preload, so as to evaluate the sealing performance of the clamp, and facilitate subsequent optimization.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a clamp preload force detection system and method. Background Art

[0002] Clamps are widely used in the oil, water, and gas circuits of the main engine products of engineering machinery to seal the oil, water, gas and other media in the pipeline. If the radial force of the clamp on the pipeline is too high, it will cause excessive elastic-plastic deformation of the hose, or even damage the hose, resulting in reduced connection reliability; if the radial force of the clamp on the pipeline is too small, the sealing performance cannot be guaranteed, which may cause the medium in the pipeline to leak. If the medium leaks seriously, it will affect the operation of the hydraulic components, the lubrication and heat dissipation of the power and transmission systems, and even cause the main engine product to be unable to operate. In addition, the hose is greatly affected by temperature and is prone to thermal expansion and contraction, which reduces the sealing performance of the clamp. Especially in severe cold weather, the leakage of the medium in the pipeline is more serious.

[0003] It should be noted that the information disclosed in the background technology section of the present invention is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes prior art already known to those skilled in the art. Summary of the invention

[0004] The invention provides a clamp pre-tightening force detection system and a clamp pre-tightening force detection method, which can detect the pre-tightening force of the clamp.

[0005] According to one aspect of the present invention, a clamp preload force detection system is provided, comprising:

[0006] The first semi-axis;

[0007] A second semi-axis, the first semi-axis and the second semi-axis are arranged opposite to each other, and in a first direction, there is a gap between the first semi-axis and the second semi-axis;

[0008] A first detection device is configured to detect a force applied to the first semi-shaft when the clamp to be tested is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft;

[0009] A second detection device is configured to detect a force applied to the second semi-shaft when the clamp to be tested is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft; and

[0010] The control device is connected to the first detection device and the second detection device by signals, and is configured to calculate the preload force applied by the clamp to be tested to the first half shaft and the second half shaft according to the detection results of the first detection device and the second detection device.

[0011] In some embodiments, the clamp preload force detection system also includes an elastic ring, and the first detection device is configured to detect the force applied to the first semi-shaft when the elastic ring is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft and the clamp to be tested is not sleeved on the outer circumference of the first semi-shaft and the second semi-shaft, and to detect the force applied to the first semi-shaft when the elastic ring is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft and the clamp to be tested is sleeved on the outer circumference of the elastic ring; the second detection device is configured to detect the force applied to the second semi-shaft when the elastic ring is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft and the clamp to be tested is not sleeved on the outer circumference of the first semi-shaft and the second semi-shaft, and to detect the force applied to the second semi-shaft when the elastic ring is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft and the clamp to be tested is sleeved on the outer circumference of the elastic ring.

[0012] In some embodiments, the clamp preload force detection system also includes a base, a first detection device connected between the base and the first half shaft to detect the force applied to the first half shaft, and a second detection device connected between the base and the second half shaft to detect the force applied to the second half shaft.

[0013] In some embodiments, the clamp preload force detection system also includes a first mounting seat and a second mounting seat fixedly mounted on the base, the first detection device is connected between the first mounting seat and the first half shaft, and the second detection device is connected between the second mounting seat and the second half shaft.

[0014] In some embodiments, the clamp preload force detection system also includes a first base connected between the first detection device and the first semi-axis, the first base includes a base body, a first slide and a second slide respectively arranged on both sides of the base body, and the first slide and the second slide are connected along a first direction; in a direction perpendicular to the first direction, the first mounting seat includes a first body away from the first base and a first protrusion close to the first base, and the second mounting seat includes a second body away from the first base and a second protrusion close to the first base; the first protrusion is slidably matched with the first slide, and the second protrusion is slidably matched with the second slide.

[0015] In some embodiments, the clamp preload force detection system further includes a slide rail and a second base, the slide rail is mounted on the base along a first direction, the second base is connected between the second detection device and the second semi-axis, and the second base is slidably matched with the slide rail.

[0016] In some embodiments, the clamp preload detection system also includes a slide rail and a second base, the slide rail is installed on the base along a first direction, the second base is connected between the second detection device and the second half axis, and the second base is slidably matched with the slide rail. In the first direction, there is a gap between the first base and the second base.

[0017] In some embodiments, in the first direction, the length of the first protrusion is smaller than the length of the first body, the length of the second protrusion is smaller than the length of the second body, the second base is at least partially embedded in the space formed between the first body and the second body, and there is a gap between the first protrusion and the second base, and there is a gap between the second protrusion and the second base.

[0018] In some embodiments, the clamp preload detection system also includes a first extended semi-shaft and a second extended semi-shaft, the first extended semi-shaft is connected between the first semi-shaft and the first detection device, the second extended semi-shaft is connected between the second semi-shaft and the second detection device, and in the first direction, there is a gap between the first extended semi-shaft and the second extended semi-shaft.

[0019] In some embodiments, the clamp preload force detection system further includes a temperature control device, which is configured to adjust the temperature of the environment in which the clamp to be tested is located.

[0020] In some embodiments, the temperature control device includes an insulation box, the first semi-axis and the second semi-axis are both arranged inside the insulation box, and the temperature inside the insulation box is adjustable.

[0021] According to another aspect of the present invention, a clamp preload detection method is provided, comprising:

[0022] The clamp to be tested is sleeved on the outer circumference of the first semi-shaft and the second semi-shaft to detect the force applied to the first semi-shaft and the force applied to the second semi-shaft;

[0023] The preload force T applied by the clamp to be tested on the first semi-axle and the second semi-axle is calculated according to the force applied to the first semi-axle and the force applied to the second semi-axle.

[0024] In some embodiments, the clamp preload force detection method further includes providing an elastic ring; and the operation of detecting the force applied to the first semi-shaft and the force applied to the second semi-shaft includes:

[0025] The elastic ring is placed on the outer circumference of the first semi-axle and the second semi-axle to detect the force P acting on the first semi-axle. 11 and the force P on the second semi-axis 12 ;

[0026] The elastic ring is placed on the outer periphery of the first semi-axle and the second semi-axle, and the clamp to be tested is placed on the outer periphery of the elastic ring to detect the force P acting on the first semi-axle. 21 and the force P on the second semi-axis 22 .

[0027] In some embodiments, the operation of calculating the preload force T applied by the clamp to be tested to the first semi-shaft and the second semi-shaft according to the force applied to the first semi-shaft and the force applied to the second semi-shaft includes:

[0028] According to the formula P1=(|P 11 |+|P 12 |) / 2 Calculate the force P1 applied by the elastic ring to the first semi-axis and the second semi-axis;

[0029] According to the formula P2=(|P 21 |+|P 22 |) / 2 Calculate the force P2 applied by the elastic ring and the clamp to be tested on the first semi-axle and the second semi-axle;

[0030] The preload force T is calculated based on the applied force P1 and the applied force P2.

[0031] In some embodiments, the first semi-axle and the second semi-axle cooperate to form a cylindrical structure, and the operation of calculating the preload force T according to the applied force P1 and the applied force P2 includes:

[0032] Calculate the force P applied by the clamp to be tested on the first semi-axle and the second semi-axle according to the formula P=P2-P1;

[0033] Calculate the radial force F per unit length applied by the clamp to be tested on the first semi-axle and the second semi-axle according to the formula F=P / D;

[0034] Calculate the preload force T according to the formula T = F*π*D;

[0035] Where D is the diameter of the cylindrical structure.

[0036] In some embodiments, the clamp preload force detection method further includes:

[0037] Provide temperature control device;

[0038] The temperature of the environment in which the clamp to be tested is located is adjusted by a temperature control device to obtain the preload force T at different temperatures.

[0039] Based on the above technical scheme, the present invention sets a first semi-axis and a second semi-axis, and sets a first detection device for detecting the force applied to the first semi-axis from the clamp to be tested, and a second detection device for detecting the force applied to the second semi-axis from the clamp to be tested, and sets a control device for calculating the pre-tightening force applied by the clamp to be tested to the first semi-axis and the second semi-axis according to the detection results of the first detection device and the second detection device. The pre-tightening force applied by the clamp to be tested to the first semi-axis and the second semi-axis can be obtained in real time, and the size of the pre-tightening force of the clamp can be detected, so as to evaluate the sealing performance of the clamp to be tested, and also facilitate further design and optimization of the clamp to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0041] Figure 1 A schematic structural diagram of an embodiment of a clamp preload force detection system of the present invention is shown;

[0042] Figure 2 A partial structural schematic diagram of another embodiment of the clamp preload force detection system of the present invention is shown;

[0043] Figure 3 A partial structural schematic diagram of another embodiment of the clamp preload force detection system of the present invention is shown;

[0044] Figure 4a It shows a schematic structural diagram of a second mounting seat in one embodiment of a clamp preload force detection system of the present invention;

[0045] Figure 4b It shows a schematic structural diagram of a first base in one embodiment of a clamp preload force detection system of the present invention;

[0046] Figure 4c It shows a schematic structural diagram of a first mounting seat in one embodiment of a clamp preload force detection system of the present invention;

[0047] Figure 5 A schematic diagram of the forces acting on the first semi-axle and the second semi-axle in one embodiment of the clamp preload detection method of the present invention is shown.

[0048] In the figure:

[0049] 1. First semi-axis; 2. Second semi-axis; 3. First detection device; 4. Clamp to be tested; 5. Second detection device; 6. Control device; 7. Elastic ring; 8. Base; 9. First mounting seat; 91. First body; 92. First protrusion; 10. Second mounting seat; 101. Second body; 102. Second protrusion; 11. First platform; 111. Platform body; 112. First slide; 113. Second slide; 12. Slide rail; 13. Second platform; 14. First extended semi-axis; 15. Second extended semi-axis; 16. Insulation box. DETAILED DESCRIPTION

[0050] The technical solutions in the embodiments will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] In the description of the present invention, it should be understood that the terms "center", "lateral", "longitudinal", "front", "back", "left", "right", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0052] like Figure 1 As shown, in some embodiments, the clamp preload force detection system provided by the present invention includes a first semi-axle 1, a second semi-axle 2, a first detection device 3, a second detection device 5 and a control device 6, wherein the first semi-axle 1 and the second semi-axle 2 are arranged relative to each other, and in the first direction, there is a gap between the first semi-axle 1 and the second semi-axle 2, the first detection device 3 is configured to detect the force applied to the first semi-axle 1 when the clamp 4 to be tested is sleeved on the outer periphery of the first semi-axle 1 and the second semi-axle 2, the second detection device 5 is configured to detect the force applied to the second semi-axle 2 when the clamp 4 to be tested is sleeved on the outer periphery of the first semi-axle 1 and the second semi-axle 2, the control device 6 is signal-connected with the first detection device 3 and the second detection device 5, and the control device 6 is configured to calculate the preload force applied by the clamp 4 to be tested to the first semi-axle 1 and the second semi-axle 2 according to the detection results of the first detection device 3 and the second detection device 5.

[0053] like Figure 1 As shown, the first detection device 3 and the second detection device 5 are respectively connected to the control device 6 via data cables, and the control device 6 can provide real-time feedback of the preload force applied by the clamp 4 to be tested on the first half-shaft 1 and the second half-shaft 2 according to the detection results of the first detection device 3 and the second detection device 5.

[0054] In other embodiments, the first detection device 3 and the second detection device 5 may also be connected to the control device 6 in a wireless manner.

[0055] like Figure 1 As shown, the first semi-shaft 1 and the second semi-shaft 2 are arranged opposite to each other, and a gap is formed between the opposite surfaces of the first semi-shaft 1 and the second semi-shaft 2 (at Figure 1 The first direction refers to the direction perpendicular to the opposite surfaces of the first semi-axis 1 and the second semi-axis 2, so as to avoid the mutual contact between the first semi-axis 1 and the second semi-axis 2 when the first detection device 3 and the second detection device 5 perform detection and thus affect the detection result.

[0056] After the clamp 4 to be tested is sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2, the clamp 4 to be tested should be tightened to make it an interference fit with the first semi-shaft 1 and the second semi-shaft 2, so that the force applied to the first semi-shaft 1 and the force applied to the second semi-shaft 2 can be detected respectively, and the pre-tightening force applied by the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2 can be calculated by the control device 6, which is conducive to evaluating the sealing performance of the clamp 4 to be tested, and also facilitates further design and optimization of the clamp 4 to be tested.

[0057] like Figure 1 As shown, in some embodiments, the clamp preload force detection system also includes an elastic ring 7, and the first detection device 3 is configured to detect the force applied to the first semi-shaft 1 when the elastic ring 7 is sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is not sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2, and detect the force applied to the first semi-shaft 1 when the elastic ring 7 is sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is sleeved on the outer periphery of the elastic ring 7; the second detection device 5 is configured to detect the force applied to the second semi-shaft 2 when the elastic ring 7 is sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is not sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2, and detect the force applied to the second semi-shaft 2 when the elastic ring 7 is sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is sleeved on the outer periphery of the elastic ring 7.

[0058] In the above embodiment, the outer peripheral structure and size of the first semi-axle 1 and the second semi-axle 2 are adapted to the elastic ring 7, the outer diameter size of the elastic ring 7 is adapted to the tightening range of the clamp 4 to be tested, and the elastic ring 7 can be used to simulate the elastic pipe fitting tightened by the clamp in actual application. When testing clamps with different shapes, specifications, and tightening ranges, different testing requirements can be met by replacing the elastic ring 7, the first semi-axle 1, and the second semi-axle 2 with different shapes, specifications, and sizes.

[0059] In the above embodiment, when the elastic ring 7 is sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is not sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2, the force applied to the first semi-shaft 1 and the second semi-shaft 2 (i.e., the force applied by the elastic ring 7 to the first semi-shaft 1 and the second semi-shaft 2 alone) is detected, and when the elastic ring 7 is sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2 and the clamp 4 to be tested is sleeved on the outer circumference of the elastic ring 7, the force applied to the first semi-shaft 1 and the second semi-shaft 2 together by the elastic ring 7 is detected, the force applied by the clamp 4 to be tested alone to the first semi-shaft 1 and the second semi-shaft 2 can be further calculated, so that the effect of the clamp 4 to be tested when used for sealing the elastic pipe fitting can be obtained, which is conducive to evaluating the sealing performance of the clamp 4 to be tested, and also facilitates further design and optimization of the clamp 4 to be tested.

[0060] like Figure 1 As shown, in some embodiments, the clamp preload force detection system also includes a base 8, a first detection device 3 is connected between the base 8 and the first semi-axis 1 to detect the force acting on the first semi-axis 1, and a second detection device 5 is connected between the base 8 and the second semi-axis 2 to detect the force acting on the second semi-axis 2.

[0061] In the above embodiment, one end of the first detection device 3 is fixedly connected to the base 8, and the other end is fixedly connected to the first semi-axis 1; one end of the second detection device 5 is fixedly connected to the base 8, and the other end is fixedly connected to the second semi-axis 2. After the clamp 4 to be tested is sleeved on the outer periphery of the first semi-axis 1 and the second semi-axis 2, the force of the clamp 4 to be tested acting on the first semi-axis 1 and the second semi-axis 2 can be transmitted to the first detection device 3 and the second detection device 5 respectively, so that the first detection device 3 and the second detection device 5 can respectively detect the force acting on the first semi-axis 1 and the second semi-axis 2 from the clamp 4 to be tested.

[0062] like Figure 1 As shown, in some embodiments, the clamp preload force detection system also includes a first mounting seat 9 and a second mounting seat 10 fixedly mounted on the base 8, the first detection device 3 is connected between the first mounting seat 9 and the first half-shaft 1, and the second detection device 5 is connected between the second mounting seat 10 and the second half-shaft 2.

[0063] In the above embodiment, the first mounting seat 9 and the second mounting seat 10 serve as mounting seats for the first detection device 3 and the second detection device 5 respectively, so as to facilitate the connection between the first detection device 3 and the second detection device 5 and the base 8. The specifications and sizes of the first mounting seat 9 and the second mounting seat 10 can be designed according to actual needs.

[0064] like Figure 3 As shown, in some embodiments, the clamp preload force detection system also includes a first base 11 connected between the first detection device 3 and the first semi-axis 1, the first base 11 includes a base body 111, a first slide 112 and a second slide 113 respectively arranged on both sides of the base body 111, and the first slide 112 and the second slide 113 are connected along the first direction; in a direction perpendicular to the first direction, the first mounting seat 9 includes a first body 91 away from the first base 11 and a first protrusion 92 close to the first base 11, and the second mounting seat 10 includes a second body 101 away from the first base 11 and a second protrusion 102 close to the first base 11; the first protrusion 92 is slidably matched with the first slide 112, and the second protrusion 102 is slidably matched with the second slide 113.

[0065] By providing a first slideway 112 and a second slideway 113 which extend through the first direction, and by providing the first protrusion 92 to slideably cooperate with the first slideway 112 and by providing the second protrusion 102 to slideably cooperate with the second slideway 113, the movement direction of the first base 11 can be guided so that the first base 11 is movable along the first direction. Furthermore, because the first base 11 is provided between the first mounting seat 9 and the second mounting seat 10 which are fixedly mounted on the base 8, the movement of the first base 11 in a direction perpendicular to the first direction is restricted, so that the force of the clamp 4 to be tested acting on the first semi-axis 1 in the first direction can be transmitted to the first detection device 3, so that the first detection device 3 can detect the force acting on the first semi-axis 1 in the first direction.

[0066] In some embodiments, the structure of the first mounting base 9 is similar to that of the second mounting base 10 .

[0067] In some embodiments, the structures of the second mounting base 10, the first base 11 and the first mounting base 9 are respectively as follows: Figure 4a , Figure 4b and Figure 4c As shown, the first mounting seat 9 includes a first body 91 and a first protrusion 92, the second mounting seat 10 includes a second body 101 and a second protrusion 102, and the first base 11 includes a base body 111, and a first slide 112 and a second slide 113 respectively arranged on both sides of the base body 111, wherein the first slide 112 is configured to slide with the first protrusion 92, and the second slide 113 is configured to slide with the second protrusion 102.

[0068] In some embodiments, the clamp preload detection system also includes a slide rail 12 and a second base 13, the slide rail 12 is installed on the base 8 along the first direction, the second base 13 is connected between the second detection device 5 and the second half shaft 2, and the second base 13 is slidably matched with the slide rail 12.

[0069] By setting a slide rail 12 installed on the base 8 along the first direction, the movement direction of the second base 13 can be guided so that the second base 13 can be movable along the first direction. At the same time, the movement of the second base 13 in a direction perpendicular to the first direction is also restricted, so that the force of the clamp 4 to be tested acting on the second semi-axis 2 in the first direction can be transmitted to the second detection device 5, so that the second detection device 5 can detect the force acting on the second semi-axis 2 in the first direction.

[0070] like Figure 2 As shown, in some embodiments, the first detection device 3 is fixedly connected to the first mounting seat 9 and the first base 11 respectively by bolts, and the second detection device 5 is fixedly connected to the second mounting seat 10 and the second base 13 respectively by bolts.

[0071] In some embodiments, the clamp preload force detection system also includes a slide rail 12 and a second base 13. The slide rail 12 is installed on the base 8 along the first direction. The second base 13 is connected between the second detection device 5 and the second semi-axis 2, and the second base 13 is slidably matched with the slide rail 12. In the first direction, there is a gap between the first base 11 and the second base 13.

[0072] By providing a gap between the first base 11 and the second base 13 , it is possible to avoid the first base 11 and the second base 13 contacting each other when the first detection device 3 and the second detection device 5 perform detection, thereby preventing the detection result from being affected.

[0073] In the above embodiment, in the first direction, the first base 11 is slidably matched with the first mounting seat 9 and the second mounting seat 10 fixedly mounted on the base 8, respectively, and the second base 13 is slidably matched with the slide rail 12 mounted on the base 8 along the first direction, that is, the first mounting seat 9 and the second mounting seat 10 play a guiding role in the movement direction of the first base 11, and the slide rail 12 plays a guiding role in the movement direction of the second base 13, so that the first base 11 and the second base 13 are movable along the first direction, and at the same time, the movement of the first base 11 and the second base 13 in the direction perpendicular to the first direction is also restricted, so that the force of the clamp 4 to be tested acting on the first semi-axis 1 and the second semi-axis 2 in the first direction can be transmitted to the first detection device 3 and the second detection device 5 respectively, so that the first detection device 3 can detect the force applied to the first semi-axis 1 in the first direction, and the second detection device 5 can detect the force applied to the second semi-axis 2 in the first direction.

[0074] like Figure 1 to Figure 3 As shown, in some embodiments, in the first direction, the length of the first protrusion 92 is smaller than the length of the first body 91, the length of the second protrusion 102 is smaller than the length of the second body 101, the second base 13 is at least partially embedded in the space formed between the first body 91 and the second body 101, and there is a gap between the first protrusion 92 and the second base 13, and there is a gap between the second protrusion 102 and the second base 13.

[0075] Specifically, Figure 4a to Figure 4cAs shown, the first mounting seat 9 includes a first body 91 and a first protrusion 92, the second mounting seat 10 includes a second body 101 and a second protrusion 102, the first base 11 includes a base body 111, and a first slide 112 and a second slide 113 respectively arranged on both sides of the base body 111, the first protrusion 92 is configured to slide with the first slide 112, and the second protrusion 102 is configured to slide with the second slide 113. In the first direction, the length of the first protrusion 92 is less than the length of the first body 91, and the length of the first protrusion 92 is equal to the length of the first slide 112, the length of the second protrusion 102 is less than the length of the second body 101, and the length of the second protrusion 102 is equal to the length of the second slide 113.

[0076] By setting a gap between the first protrusion 92 and the second base 13, and setting a gap between the second protrusion 102 and the second base 13, it is possible to avoid the first base 11 and the second base 13 from contacting each other when the first detection device 3 and the second detection device 5 are performing detection, thereby preventing the detection result from being affected. The second base 13 is at least partially embedded in the space formed between the first body 91 and the second body 101, which can limit the movement of the second base 13 in a direction perpendicular to the first direction and improve the stability and integrity of the clamp preload detection system structure.

[0077] like Figure 1 As shown, in some embodiments, the clamp preload detection system also includes a first extended semi-axis 14 and a second extended semi-axis 15, the first extended semi-axis 14 is connected between the first semi-axis 1 and the first detection device 3, the second extended semi-axis 15 is connected between the second semi-axis 2 and the second detection device 5, and in the first direction, there is a gap between the first extended semi-axis 14 and the second extended semi-axis 15.

[0078] The lengths of the first extended semi-axis 14 and the second extended semi-axis 15 can be designed according to actual needs. The positions of the first semi-axis 1 and the second semi-axis 2 can be adjusted by changing the lengths of the first extended semi-axis 14 and the second extended semi-axis 15 so that the clamp 4 to be tested is located in a position that is easy to detect.

[0079] In some embodiments, the first semi-shaft 1 and the first extended semi-shaft 14 are detachably connected, and the second semi-shaft 2 and the second extended semi-shaft 15 are detachably connected.

[0080] In some embodiments, the end of the first semi-shaft 1 close to the first extended semi-shaft 14 includes a first flange portion extending vertically outward from the outer peripheral surface of the first semi-shaft 1, the end of the second semi-shaft 2 close to the second extended semi-shaft 15 includes a second flange portion extending vertically outward from the outer peripheral surface of the second semi-shaft 2, the end of the first extended semi-shaft 14 close to the first semi-shaft 1 includes a third flange portion extending vertically outward from the outer peripheral surface of the first extended semi-shaft 14, and the end of the second extended semi-shaft 15 close to the second semi-shaft 2 includes a fourth flange portion extending vertically outward from the outer peripheral surface of the second extended semi-shaft 15. The first semi-shaft 1 is connected to the first extended semi-shaft 14 through the first flange portion and the third flange portion, and the second semi-shaft 2 is connected to the second extended semi-shaft 15 through the second flange portion and the fourth flange portion. The first flange portion and the third flange portion may be connected by threaded connection, bonding, clamping or the like, and the second flange portion and the fourth flange portion may be connected in the same manner as the first flange portion and the third flange portion.

[0081] like Figure 1 As shown, in some embodiments, the first semi-shaft 1 is connected to the first extended semi-shaft 14 via a flange, and the second semi-shaft 2 is connected to the second extended semi-shaft 15 via a flange.

[0082] like Figure 3 As shown, in some embodiments, the end of the first extended semi-shaft 14 close to the first base 11 includes a fifth flange portion extending vertically outward from the outer peripheral surface of the first extended semi-shaft 14, and the fifth flange portion is provided with a connecting hole for connecting to the first base 11, and the end of the second extended semi-shaft 15 close to the second base 13 includes a sixth flange portion extending vertically outward from the outer peripheral surface of the second extended semi-shaft 15, and the sixth flange portion is provided with a connecting hole for connecting to the second base 13.

[0083] like Figure 1 As shown, in some embodiments, the first extended semi-shaft 14 is connected to the first base 11 by bolts, and the second extended semi-shaft 15 is connected to the second base 13 by bolts.

[0084] In some embodiments, the clamp preload force detection system can be adapted to the detection of clamps with different tightening ranges by replacing the first half-shaft 1 and the second half-shaft 2 with different specifications, or by changing the size of the gap between the first half-shaft 1 and the second half-shaft 2.

[0085] In the daily application of clamps, the pipes to be sealed are easily deformed due to the influence of temperature, so it is of great significance to detect the sealing performance of clamps in environments with different temperatures.

[0086] In some embodiments, the clamp preload force detection system further includes a temperature control device, which is configured to adjust the temperature of the environment in which the clamp 4 to be tested is located.

[0087] By adjusting the temperature of the environment in which the clamp 4 to be tested is located through the temperature control device, it is possible to simulate the environment in which the clamp 4 to be tested is used daily, which is conducive to accurately evaluating the sealing performance of the clamp 4 to be tested.

[0088] like Figure 1 As shown, in some embodiments, the temperature control device includes an insulation box 16, the first half-shaft 1 and the second half-shaft 2 are both arranged inside the insulation box 16, and the temperature inside the insulation box 16 is adjustable.

[0089] During the test, the first half-shaft 1, the second half-shaft 2, the elastic ring 7 and the clamp 4 to be tested are placed inside the insulation box 16. By adjusting the temperature inside the insulation box 16, the actual application environment of the clamp 4 to be tested can be simulated, thereby improving the accuracy of the detection.

[0090] According to another aspect of the present invention, a clamp preload force detection method based on the clamp preload force detection system is provided, comprising:

[0091] The clamp 4 to be tested is sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2 to detect the force applied to the first semi-shaft 1 and the force applied to the second semi-shaft 2;

[0092] The preload force T applied by the clamp 4 to the first and second semi-axles 1 and 2 is calculated according to the force applied to the first and second semi-axles 1 and 2 .

[0093] In the above embodiment, according to the geometric and mechanical relationship between the force applied to the first semi-shaft 1 and the force applied to the second semi-shaft 2 and the preload force T applied by the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2, the operational relationship between these three can be obtained, and thus the preload force T applied by the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2 can be obtained according to the operational relationship.

[0094] In some embodiments, the clamp preload force detection method further includes providing an elastic ring 7; and the operation of detecting the force applied to the first semi-shaft 1 and the force applied to the second semi-shaft 2 includes:

[0095] The elastic ring 7 is sleeved on the outer circumference of the first semi-shaft 1 and the second semi-shaft 2 to detect the force P acting on the first semi-shaft 1. 11 The force P on the second semi-axle 2 12 ;

[0096] The elastic ring 7 is sleeved on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2, and the clamp 4 to be tested is sleeved on the outer periphery of the elastic ring 7 to detect the force P acting on the first semi-shaft 1. 21 The force P on the second semi-axle 2 22 .

[0097] The elastic ring 7 can be used to simulate the elastic pipe fitting fastened by the clamp in actual application, so that the detection environment provided by the clamp preload detection method of the present invention is closer to the actual working environment of the clamp, thereby improving the detection accuracy.

[0098] In some embodiments, the operation of calculating the preload force T applied by the clamp 4 to be tested on the first semi-shaft 1 and the second semi-shaft 2 according to the force applied to the first semi-shaft 1 and the force applied to the second semi-shaft 2 includes:

[0099] According to the formula P1=(|P 11 |+|P 12 |) / 2 calculate the force P1 applied by the elastic ring 7 to the first semi-axle 1 and the second semi-axle 2;

[0100] According to the formula P2=(|P 21 |+|P 22 |) / 2 calculate the force P2 applied by the elastic ring 7 and the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2;

[0101] The preload force T is calculated based on the applied force P1 and the applied force P2.

[0102] Theoretically, the force P acting on the first semi-axle 1 is 11 The force P on the second semi-axle 2 12 The direction should be opposite and the magnitude should be equal. Therefore, in actual testing, the force P 11 Or force P 12 The positive direction of the force P1 is defined as the positive direction of the force P1, and the magnitude of the force P1 in this direction is calculated, that is, the force P 11 and the force P 12 The absolute value of |P 11 | and |P 12 |Just do the calculation.

[0103] However, due to the possibility of certain errors in the actual detection process, 11 | and |P 12 Taking the average value of | can reduce the impact of detection errors and improve the accuracy of detection results.

[0104] Similarly, in actual testing, the force P 21 Or force P 22 The positive direction of the force P2 is defined as the positive direction of the force P2, and the magnitude of the force P2 in this direction is calculated, that is, according to the force P 21 and the force P 22 The absolute value of |P 21 | and |P 22 |Calculate the magnitude of the force P2.

[0105] In some embodiments, the first semi-axle 1 and the second semi-axle 2 cooperate to form a cylindrical structure, and the operation of calculating the preload force T according to the applied force P1 and the applied force P2 includes:

[0106] The force P applied by the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2 is calculated according to the formula P=P2-P1;

[0107] The radial force F per unit length applied by the clamp 4 to be tested to the first semi-shaft 1 and the second semi-shaft 2 is calculated according to the formula F=P / D;

[0108] Calculate the preload force T according to the formula T = F*π*D;

[0109] Where D is the diameter of the cylindrical structure.

[0110] In the above embodiment, after obtaining the magnitude of the force P1 applied by the elastic ring 7 alone to the first semi-shaft 1 and the second semi-shaft 2 and the magnitude of the force P2 applied by the elastic ring 7 and the clamp 4 to be tested together to the first semi-shaft 1 and the second semi-shaft 2, by calculating the difference between the two, the magnitude of the force P applied by the clamp 4 to be tested alone to the first semi-shaft 1 and the second semi-shaft 2 can be obtained. The direction of the force P is defined as being parallel to the first direction.

[0111] like Figure 5 As shown, through further mechanical analysis of the applied force P and the radial force per unit length F, the operational relationship between the two can be obtained as follows:

[0112]

[0113] Among them, the direction of the radial force F per unit length is the direction from any point on the outer circumferential surface of the first semi-axis 1 and / or the second semi-axis 2 to the center of the cross-section of the cylindrical structure, α is the angle between the radial force F per unit length and the opposite surface of the first semi-axis 1 and / or the second semi-axis 2, and D is the diameter of the cylindrical structure.

[0114] That is, the operational relationship between the applied force P and the radial force F per unit length is F=P / D; thus, the magnitude of the preload force T can be calculated according to the operational relationship between the preload force T and the radial force F per unit length T=F*π*D.

[0115] In some embodiments, the clamp preload force detection method further includes providing a temperature control device; adjusting the temperature of the environment in which the clamp 4 to be tested is located by the temperature control device to obtain the preload force T at different temperatures.

[0116] By changing the temperature of the environment where the clamp 4 to be tested is located, the preload forces T1, T2, ..., T2 at different temperatures are obtained according to the above formula. n , which can provide data support for analyzing the sealing performance of clamps at different temperatures.

[0117] The structure and working process of an embodiment of the clamp preload detection system of the present invention are described below.

[0118] like Figure 1 As shown, the clamp preload force detection system of the present invention includes a first semi-axle 1, a first extended semi-axle 14, a first base 11, a first detection device 3, a first mounting seat 9, a second base 13, a slide rail 12, a base 8, a second detection device 5, a second mounting seat 10, a second extended semi-axle 15, a second semi-axle 2, a temperature control device, an elastic ring 7, a clamp to be tested 4, and a control device 6, and the temperature control device includes an insulation box 16.

[0119] The first semi-shaft 1, the second semi-shaft 2, the first extended semi-shaft 14 and the second extended semi-shaft 15 are semi-cylindrical structures. The first semi-shaft 1 and the second semi-shaft 2, the first extended semi-shaft 14 and the second extended semi-shaft 15 are respectively matched to form cylindrical structures, and a gap is left near the plane passing through the center line of the cylindrical structure (at Figure 1 The outer diameter of the cylindrical structure is matched with the elastic ring 7; the outer diameter of the elastic ring 7 is matched with the tightening range of the clamp 4 to be tested; the first semi-shaft 1 and the first extended semi-shaft 14, the second semi-shaft 2 and the second extended semi-shaft 15 are connected by a flange, the first extended semi-shaft 14 and the first base 11 are connected by bolts, and the second extended semi-shaft 15 and the second base 13 are connected by bolts; the first detection device 3 is fixedly connected to the first base 11 and the first mounting seat 9 by bolts; the first mounting seat 9 and the second mounting seat 10 are fixedly mounted on the base 8; the second detection device 5 is connected to the second base 13 by bolts. , and the second mounting seat 10 are fixedly connected by bolts; the first base 11 is slidably matched with the first mounting seat 9 and the second mounting seat 10; the slide rail 12 is fixedly mounted on the base 8, and the second base 13 is slidably matched with the slide rail 12; the insulation box 16 is provided with a circular hole that matches the cylindrical structure formed by the first extended semi-axis 14 and the second extended semi-axis 15, and the insulation box 16 covers the first semi-axis 1, the second semi-axis 2, the elastic ring 7 and the clamp 4 to be tested therein, thereby playing a heat preservation role, and the temperature in the insulation box 16 can be changed by the temperature control device; the first detection device 3 and the second detection device 5 are connected to the control device 6 through a data line, so that the control device 6 can feedback the detection data of the first detection device 3 and the second detection device 5 in real time.

[0120] Based on the clamp preload force detection system, the steps of using the clamp preload force detection method of the present invention to detect the clamp preload force include:

[0121] Select a suitable elastic ring 7 according to the specification and tightening range of the clamp 4 to be tested, and sleeve the elastic ring 7 on the outer periphery of the first semi-shaft 1 and the second semi-shaft 2 to detect the force P acting on the first semi-shaft 1. 11 The force P on the second semi-axle 2 12 ;

[0122] The clamp 4 to be tested is placed on the outer periphery of the elastic ring 7, and the clamp 4 to be tested is tightened to detect the force P acting on the first semi-axle 1. 21 The force P on the second semi-axle 2 22 ;

[0123] The preload force T of the clamp 4 to be tested is calculated by the control device 6;

[0124] Change the temperature inside the heat preservation box 16, repeat the above steps, and obtain the preload force T1, T2, ..., T of the clamp 4 to be tested at different temperatures. n .

[0125] Through the description of multiple embodiments of the clamp preload force detection system and method of the present invention, it can be seen that the clamp preload force detection system and method of the present invention have at least the following advantages:

[0126] 1. It can provide real-time feedback on the preload force of the clamp, which is beneficial for evaluating the sealing performance of the clamp and also convenient for further design and optimization of the clamp to be tested;

[0127] 2. Suitable for testing clamps with different tightening ranges, and can meet different testing needs;

[0128] 3. The pre-tightening force of the clamp at different working temperatures can be detected to provide data support for analyzing the sealing performance of the clamp at different temperatures.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that without departing from the principles of the present invention, the specific implementation methods of the present invention can still be modified or some technical features can be replaced by equivalents, and these modifications and equivalent replacements should be included in the scope of the technical solution for protection of the present invention.

Claims

1. A clamp preload force detection system, characterized in that: include: First semi-axis (1); A second semi-shaft (2), wherein the first semi-shaft (1) and the second semi-shaft (2) are arranged opposite to each other, and in a first direction, there is a gap between the first semi-shaft (1) and the second semi-shaft (2); A first detection device (3) is configured to detect a force applied to the first semi-shaft (1) when the clamp (4) to be tested is sleeved on the outer circumference of the first semi-shaft (1) and the second semi-shaft (2); A second detection device (5) is configured to detect a force applied to the second semi-shaft (2) when the clamp (4) to be tested is sleeved on the outer circumference of the first semi-shaft (1) and the second semi-shaft (2); and A control device (6) connected to the first detection device (3) and the second detection device (5) by signals, the control device (6) being configured to calculate the preload force applied by the clamp (4) to be tested to the first semi-axle (1) and the second semi-axle (2) according to the detection results of the first detection device (3) and the second detection device (5); The clamp preload force detection system further comprises an elastic ring (7), wherein the first detection device (3) is configured to detect the force applied to the first semi-shaft (1) when the elastic ring (7) is sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2) and the clamp to be tested (4) is not sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2), and to detect the force applied to the first semi-shaft (1) when the elastic ring (7) is sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2) and the clamp to be tested (4) is sleeved on the outer periphery of the elastic ring (7). The second detection device (5) is configured to detect the force applied to the second semi-shaft (2) when the elastic ring (7) is sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2) and the clamp to be tested (4) is not sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2), and to detect the force applied to the second semi-shaft (2) when the elastic ring (7) is sleeved on the outer peripheries of the first semi-shaft (1) and the second semi-shaft (2) and the clamp to be tested (4) is sleeved on the outer periphery of the elastic ring (7).

2. The clamp preload force detection system according to claim 1, characterized in that: It also includes a base (8), the first detection device (3) is connected between the base (8) and the first semi-axis (1) to detect the force acting on the first semi-axis (1), and the second detection device (5) is connected between the base (8) and the second semi-axis (2) to detect the force acting on the second semi-axis (2).

3. The clamp preload force detection system according to claim 2, characterized in that: It also comprises a first mounting seat (9) and a second mounting seat (10) fixedly mounted on the base (8), the first detection device (3) being connected between the first mounting seat (9) and the first semi-axle (1), and the second detection device (5) being connected between the second mounting seat (10) and the second semi-axle (2).

4. The clamp preload force detection system according to claim 3, characterized in that: It also includes a first base (11) connected between the first detection device (3) and the first semi-axis (1), the first base (11) including a base body (111), a first slideway (112) and a second slideway (113) respectively arranged on both sides of the base body (111), the first slideway (112) and the second slideway (113) are connected along the first direction; in a direction perpendicular to the first direction, the first mounting seat (9) includes a first body (91) away from the first base (11) and a first protrusion (92) close to the first base (11), and the second mounting seat (10) includes a second body (101) away from the first base (11) and a second protrusion (102) close to the first base (11); the first protrusion (92) is slidably matched with the first slideway (112), and the second protrusion (102) is slidably matched with the second slideway (113).

5. The clamp preload force detection system according to claim 3, characterized in that: It also includes a slide rail (12) and a second base (13), wherein the slide rail (12) is installed on the base (8) along the first direction, and the second base (13) is connected between the second detection device (5) and the second semi-axis (2), and the second base (13) is slidably matched with the slide rail (12).

6. The clamp preload force detection system according to claim 4, characterized in that: It also includes a slide rail (12) and a second base (13), wherein the slide rail (12) is installed on the base (8) along the first direction, the second base (13) is connected between the second detection device (5) and the second semi-axis (2), and the second base (13) is slidably matched with the slide rail (12), and in the first direction, there is a gap between the first base (11) and the second base (13).

7. The clamp preload force detection system according to claim 6, characterized in that: In the first direction, the length of the first protrusion (92) is smaller than the length of the first body (91), the length of the second protrusion (102) is smaller than the length of the second body (101), the second base (13) is at least partially embedded in the space formed between the first body (91) and the second body (101), and there is a gap between the first protrusion (92) and the second base (13), and there is a gap between the second protrusion (102) and the second base (13).

8. The clamp preload force detection system according to claim 2, characterized in that: The invention also comprises a first extended semi-axis (14) and a second extended semi-axis (15), wherein the first extended semi-axis (14) is connected between the first semi-axis (1) and the first detection device (3), and the second extended semi-axis (15) is connected between the second semi-axis (2) and the second detection device (5), and in the first direction, there is a gap between the first extended semi-axis (14) and the second extended semi-axis (15).

9. The clamp preload force detection system according to claim 1, characterized in that: It also comprises a temperature control device, which is configured to adjust the temperature of the environment in which the clamp (4) to be tested is located.

10. The clamp preload force detection system according to claim 9, characterized in that: The temperature control device comprises a heat preservation box (16), the first half-shaft (1) and the second half-shaft (2) are both arranged inside the heat preservation box (16), and the temperature inside the heat preservation box (16) is adjustable.

11. A clamp preload force detection method based on the clamp preload force detection system according to any one of claims 1 to 10, characterized in that: include: The clamp (4) to be tested is sleeved on the outer circumference of the first semi-shaft (1) and the second semi-shaft (2), and the force acting on the first semi-shaft (1) and the force acting on the second semi-shaft (2) are detected; The preload force T applied by the clamp (4) to be tested on the first half-shaft (1) and the second half-shaft (2) is calculated based on the force applied to the first half-shaft (1) and the force applied to the second half-shaft (2).

12. The clamp preload force detection method according to claim 11, characterized in that: Also includes providing an elastic ring (7); The operation of detecting the force applied to the first semi-axis (1) and the force applied to the second semi-axis (2) comprises: The elastic ring (7) is sleeved on the outer circumference of the first semi-shaft (1) and the second semi-shaft (2), and the force P acting on the first semi-shaft (1) is detected. 11 and the force P acting on the second semi-axle (2) 12 ; The elastic ring (7) is sleeved on the outer circumference of the first semi-shaft (1) and the second semi-shaft (2), and the clamp (4) to be tested is sleeved on the outer circumference of the elastic ring (7), and the force P acting on the first semi-shaft (1) is detected. 21 and the force P acting on the second semi-axle (2) 22 .

13. The clamp preload force detection method according to claim 12, characterized in that: The operation of calculating the preload force T applied by the clamp (4) to be tested to the first semi-shaft (1) and the second semi-shaft (2) according to the force applied to the first semi-shaft (1) and the force applied to the second semi-shaft (2) comprises: According to the formula P1=(|P 11 |+|P 12 |) / 2 calculate the force P1 applied by the elastic ring (7) to the first semi-axis (1) and the second semi-axis (2); According to the formula P2=(|P 21 |+|P 22 |) / 2 calculate the force P2 applied by the elastic ring (7) and the clamp (4) to be tested to the first semi-shaft (1) and the second semi-shaft (2); The preload force T is calculated according to the acting force P1 and the acting force P2.

14. The clamp preload force detection method according to claim 13, characterized in that: The first half shaft (1) and the second half shaft (2) cooperate to form a cylindrical structure, and the operation of calculating the preload force T according to the applied force P1 and the applied force P2 includes: Calculating the force P applied by the clamp (4) to be tested on the first semi-shaft (1) and the second semi-shaft (2) according to the formula P=P2-P1; Calculating the radial force F per unit length applied by the clamp (4) to be tested on the first semi-shaft (1) and the second semi-shaft (2) according to the formula F=P / D; The preload force T is calculated according to the formula T=F*π*D; Wherein, D is the diameter of the cylindrical structure.

15. The clamp preload force detection method according to claim 11, characterized in that: Also includes: Provide temperature control device; The temperature of the environment in which the clamp (4) to be tested is located is adjusted by the temperature control device to obtain the preload force T at different temperatures.

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