A performance testing apparatus for high pressure fluid connections

Abstract

The present application relates to the technical field of fluid connection detection, in particular to a performance detection equipment for high-pressure fluid connection. The detection equipment comprises a pressure injection pipeline, a plugging column, a position adjusting mechanism and a plugging mechanism. The plugging mechanism is respectively sleeved on the pressure injection pipeline and the plugging column, and comprises a pressure applying adjusting assembly, a pressure bearing plugging assembly, a pressure applying spring and a current type pressure measuring sensing assembly. The plugging mechanism is arranged at the connection between the pressure injection pipeline and the plugging column and the fluid connection, and the position adjusting mechanism is used to adjust the deformation amount of the pressure applying spring, so as to adjust the plugging pressure of the pressure bearing plugging assembly applied to the connection between the pressure injection pipeline and the plugging column and the fluid connection. When the pressure bearing plugging assembly moves under the influence of the leaked hydraulic pressure, the accurate value of the leaked hydraulic pressure can be obtained, so that the sealing performance of the fluid connection is known, and the installation pre-tightening force data required when the fluid connection is connected is calculated.

Description

Technical Field

[0001] This invention belongs to the field of fluid connector testing technology, specifically relating to a performance testing device for high-pressure fluid connectors. Background Technology

[0002] Pipelines are an indispensable structure in fluid transportation, and fluid connectors, also known as fluid fittings, are devices used to connect pipelines that transport fluids. During fluid transportation, it is necessary to control the flow rate in the pipeline or filter impurities from the fluid.

[0003] Pipelines and fluid connectors are typically connected by threads, which are prone to leaks. To improve the reliability and sealing of the connection, the threads of the fluid connector are usually tested for leaks before installation. Currently, liquid seal testing equipment is commonly used to test the threads. This equipment mainly consists of a high-pressure liquid source and a connecting pipe. During testing, a pressure-injecting pipe is threaded to one end of the fluid connector, and the other end is sealed. High-pressure liquid is then injected into the connector through the injection pipe, and the leak at the threaded connection is observed to determine its seal. However, this method typically only determines whether the threaded connection is sealed and cannot accurately determine the leakage pressure. Summary of the Invention

[0004] The purpose of this invention is to provide a performance testing device for high-pressure fluid connectors in order to solve the above-mentioned problems.

[0005] The present invention achieves the above objectives through the following technical solutions: A performance testing device for high-pressure fluid connectors includes a base, a fixed support plate fixedly connected to one end of the base, a movable support plate slidably connected to the other end of the base, an injection pipe movably connected to the fixed support plate, a sealing column fixedly connected to the movable support plate, two position adjustment mechanisms, and a sealing mechanism connected to one end of the position adjustment mechanisms. The two position adjustment mechanisms are respectively connected to the fixed support plate and the movable support plate, and the two sealing mechanisms are respectively sleeved on the injection pipe and the sealing column. Both the injection pipe and the sealing column are provided with external threads. The position adjustment mechanism includes a motor, a reduction gear assembly connected to the motor housing, and a linear motion assembly connected to the output end of the reduction gear assembly. One end of the linear motion assembly passes through a fixed support plate or a movable support plate and is connected to a corresponding sealing mechanism. The motor drives the linear motion assembly to move along the central axis of the injection pipeline through the reduction gear assembly. The sealing mechanism includes a pressure regulating component, a pressure-bearing sealing component slidably connected to the pressure regulating component, and a pressure spring and a current-type pressure sensing component connected between the pressure regulating component and the pressure-bearing sealing component. The pressure regulating component is connected to a linear motion component and is used to adjust the pressure applied by the pressure spring to the pressure-bearing sealing component. The pressure-bearing sealing component is used to seal the injection pipeline or the threaded connection between the column and the fluid connector. The current-type pressure sensing component is used to detect the deformation of the pressure spring.

[0006] As a further optimization of the present invention, the base is provided with a limiting slide groove, and a lead screw is movably connected to the inner wall of the limiting slide groove. The lower end of the movable support plate is connected to a first limiting slider, which is located in the limiting slide groove and threadedly connected to the lead screw. One end of the lead screw passes through the limiting slide groove and extends to the outside of the base.

[0007] As a further optimization of the present invention, both the fixed support plate and the movable support plate are provided with limiting holes for the linear moving component to pass through. The central axis of the injection pipe and the central axis of the sealing column are parallel to the central axis of the limiting holes. The motor is detachably connected to the fixed support plate or the movable support plate.

[0008] As a further optimization of the present invention, the speed reduction transmission assembly includes a housing, a first transmission shaft, a second transmission shaft, and a screw sequentially and movably connected to the inner wall of the housing from top to bottom, a first transmission gear connected to the first transmission shaft, a second transmission gear and a third transmission gear connected to the second transmission shaft, and a fourth transmission gear connected to the screw. One end of the screw passes through the housing and extends into the linear motion assembly. The output shaft of the motor extends into the housing and is connected to one end of the first transmission shaft. The first and second transmission gears mesh with each other, and the third and fourth transmission gears mesh with each other. The linear motion assembly is detachably connected to the housing.

[0009] As a further optimization of the present invention, the linear movement component includes a hollow fixed outer sleeve detachably connected to the housing, a hollow movable sleeve disposed inside the hollow fixed outer sleeve and a second limiting slider, and a threaded sleeve connected to the inner wall of the hollow movable sleeve. One end of the hollow movable sleeve is connected to the second limiting slider, and the other end extends to the outside of the hollow fixed outer sleeve and is connected to the pressure adjustment component. The second limiting slider is slidably connected to the hollow fixed outer sleeve, and one end of the screw passes through the second limiting slider and is threadedly connected to the threaded sleeve.

[0010] As a further optimization of the present invention, the pressure adjustment assembly includes a first ring plate, a first L-shaped outer ring body, a first limiting ring body, and a first L-shaped inner ring body connected to one side wall of the first ring plate. The inner diameter of the first L-shaped outer ring body is larger than the outer diameter of the first limiting ring body, the inner diameter of the first limiting ring body is larger than the outer diameter of the first L-shaped inner ring body, the inner diameter of the first L-shaped inner ring body is larger than the inner diameter of the first ring plate, and the inner diameter of the first ring plate is the same as the diameter of the injection pipe or the sealing column. The first ring plate is provided with a perforation.

[0011] As a further optimization of the present invention, the pressure-bearing sealing assembly includes a second ring plate, a second L-shaped outer ring body connected to one side wall of the second ring plate, a second limiting ring body, and a second L-shaped inner ring body. The inner diameter of the second L-shaped outer ring body is larger than the outer diameter of the second limiting ring body, the inner diameter of the second limiting ring body is larger than the outer diameter of the second L-shaped inner ring body, and the inner diameter of the second L-shaped inner ring body is larger than the inner diameter of the second ring plate. The inner diameter of the second ring plate is the same as the diameter of the injection pipe or sealing column. The second L-shaped outer ring body is slidably connected to the first L-shaped outer ring body, and the second L-shaped inner ring body is slidably connected to the first L-shaped inner ring body.

[0012] As a further optimization of the present invention, the two ends of the compression spring are respectively located between the first L-shaped outer ring and the first limiting ring, and between the second L-shaped outer ring and the second limiting ring.

[0013] As a further optimization of the present invention, the current-type voltage sensing component includes a variable resistance sensing component and a connecting rod connected to the variable resistance sensing component. One end of the connecting rod is connected to the second ring plate, and the variable resistance sensing component is connected to the first L-shaped inner ring body.

[0014] As a further optimization of the present invention, the variable resistance sensing component includes a support frame, a first electrical connection terminal connected to one side wall of the support frame, a resistive element and a metal rod connected to the inner wall of the support frame, a second electrical connection terminal connected to both ends of the metal rod, a conductive slider slidably connected to the metal rod, and an insulating slider connected to the conductive slider. The metal rod is located at the upper end of the resistive element and the two are arranged in parallel. The conductive slider is in contact with the resistive element, and the resistive element is electrically connected to the first electrical connection terminal. The insulating slider is connected to the other end of the connecting rod.

[0015] The beneficial effects of this invention are as follows: This invention provides a sealing mechanism at the connection between the injection pipe and the sealing column and the fluid connector, and employs a position adjustment mechanism to drive the sealing mechanism to move along the central axis of the injection pipe or the sealing column. This adjusts the deformation of the pressure spring by the pressure adjustment component in the sealing mechanism, thereby adjusting the pressure applied by the pressure spring to the pressure-bearing sealing component, and subsequently adjusting the sealing pressure applied by the pressure-bearing sealing component at the connection between the injection pipe and the sealing column and the fluid connector. When the pressure-bearing sealing component moves due to leaked hydraulic pressure, the secondary deformation of the pressure spring is accurately detected by a current-type pressure sensing component to obtain a precise value of the leaked hydraulic pressure. This allows for the determination of the sealing performance of the fluid connector and facilitates the calculation of the installation preload when connecting the fluid connector. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a view showing the cooperation between the position adjustment mechanism and the blocking mechanism of the present invention; Figure 3 This is a partial structural schematic diagram of the sealing mechanism of the present invention; Figure 4 This is a partial cross-sectional view of the sealing mechanism of the present invention; Figure 5 This is a schematic diagram of the structure of the current-type voltage sensing component of the present invention; Figure 6 This is a cross-sectional view of the position adjustment mechanism of the present invention.

[0017] In the diagram: 1. Base; 101. Limiting groove; 2. Fixed support plate; 3. Movable support plate; 301. First limiting slider; 4. Sealing column; 5. Position adjustment mechanism; 51. Motor; 52. Reduction transmission assembly; 5201. Housing; 5202. First transmission shaft; 5203. First transmission gear; 5204. Second transmission shaft; 5205. Second transmission gear; 5206. Third transmission gear; 5207. Screw; 5208. Fourth transmission gear; 53. Linear movement assembly; 5301. Hollow fixed outer sleeve; 5302. Hollow movable sleeve; 5303. Threaded sleeve; 5304. Second limiting slider; 6. Sealing mechanism; 61. Pressure regulating assembly; 6101, first ring plate; 6102, first L-shaped outer ring; 6103, first L-shaped inner ring; 6104, first limiting ring; 6105, perforation; 62, pressure-bearing sealing assembly; 6201, second ring plate; 6202, second L-shaped outer ring; 6203, second L-shaped inner ring; 6204, second limiting ring; 63, pressure spring; 64, current-type pressure sensing assembly; 6401, support frame; 6402, first electrical connection terminal; 6403, resistive element; 6404, metal rod; 6405, second electrical connection terminal; 6406, conductive slider; 6407, insulating slider; 6408, connecting rod; 7, pressure injection pipe. Detailed Implementation

[0018] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] like Figure 1-4 The image shows a preferred performance testing device for high-pressure fluid connectors. It includes a base 1, a fixed support plate 2 fixedly connected to one end of the base 1, a movable support plate 3 slidably connected to the other end of the base 1, an injection pipe 7 movably connected to the fixed support plate 2, a sealing column 4 fixedly connected to the movable support plate 3, two position adjustment mechanisms 5, and a sealing mechanism 6 connected to one end of each position adjustment mechanism 5. The two position adjustment mechanisms 5 are respectively connected to the fixed support plate 2 and the movable support plate 3. The two sealing mechanisms 6 are respectively sleeved on the injection pipe 7 and the sealing column 4. Both the injection pipe 7 and the sealing column 4 are provided with external threads.

[0020] The position adjustment mechanism 5 includes a motor 51, a speed reduction transmission assembly 52 connected to the housing of the motor 51, and a linear motion assembly 53 connected to the output end of the speed reduction transmission assembly 52. ​​One end of the linear motion assembly 53 passes through the fixed support plate 2 or the movable support plate 3 and is connected to the corresponding sealing mechanism 6. The motor 51 drives the linear motion assembly 53 to move along the central axis of the injection pipe 7 through the speed reduction transmission assembly 52.

[0021] The sealing mechanism 6 includes a pressure regulating component 61, a pressure-bearing sealing component 62 slidably connected to the pressure regulating component 61, a pressure spring 63 and a current-type pressure sensing component 64 connected between the pressure regulating component 61 and the pressure-bearing sealing component 62. The pressure regulating component 61 is connected to the linear motion component 53 and is used to adjust the pressure applied by the pressure spring 63 to the pressure-bearing sealing component 62. The pressure-bearing sealing component 62 is used to seal the threaded connection between the injection pipe 7 or the sealing column 4 and the fluid connector. The current-type pressure sensing component 64 is used to detect the deformation of the pressure spring 63.

[0022] When testing the sealing performance of a fluid connector, both ends of the connector to be tested are connected to the injection pipe 7 and the sealing column 4, respectively. Then, the sealing mechanism 6, located at the connection between the injection pipe 7, the sealing column 4, and the fluid connector, is pushed towards the fluid connector by the position adjustment mechanism 5 until it makes tight contact with both ends of the fluid connector. Once the pressure-bearing sealing component 62 in the sealing mechanism 6 makes tight contact with both ends of the fluid connector, its displacement stops. At this point, the position adjustment mechanism 5 continues to push the pressure adjustment component 61 to move, adjusting the deformation of the pressure spring 63 between the pressure adjustment component 61 and the pressure-bearing sealing component 62. The pressure spring 63, after deformation, generates a corresponding elastic force, which is applied to the pressure-bearing sealing component 62. The pressure-bearing sealing component 62, after receiving the force, transmits it to the fluid connector, thereby adjusting the sealing pressure applied by the pressure-bearing sealing component 62 at the connection between the injection pipe 7, the sealing column 4, and the fluid connector. By setting an initial sealing pressure value, liquid is introduced into the fluid connector through the injection pipe 7 until the set hydraulic pressure value is reached. If the pressure-bearing sealing component 62 does not undergo secondary displacement, it indicates that there is no liquid leakage at the sealing point. Then, the pressure value on the pressure-bearing sealing component is continuously reduced until the pressure value is zero. If no secondary displacement occurs during this process, it indicates that the sealing effect of the threaded connection of the fluid connector is good and can meet the current requirements for fluid hydraulic transmission. If the pressure-bearing sealing component 62 undergoes secondary movement due to leakage hydraulic pressure, the secondary deformation of the pressure spring 63 can be accurately detected by the current-type pressure sensing component 64 to obtain the accurate value of the leakage hydraulic pressure. This allows for the acquisition of the sealing performance value of the fluid connector, i.e., the pressure relief value at the threaded connection, and also facilitates the calculation of the installation preload when connecting the fluid connector in actual use.

[0023] The base 1 is provided with a limiting groove 101, and a lead screw is movably connected to the inner wall of the limiting groove 101. The lower end of the movable support plate 3 is connected to a first limiting slider 301. The first limiting slider 301 is located in the limiting groove 101 and is threadedly connected to the lead screw. One end of the lead screw passes through the limiting groove 101 and extends to the outside of the base 1.

[0024] It should be noted that when testing fluid connectors of different models and lengths, the distance between the sealing column 4 and the injection pipe 7 can be adaptively adjusted by changing the position of the movable support plate 3, facilitating the connection between the fluid connector, the injection pipe 7, and the sealing column 4. During adjustment, the first limiting slider 301 is moved along the central axis of the screw by rotating the lead screw movably connected in the limiting groove 101. At this time, the first limiting slider 301 can drive the movable support plate 3 to move towards or away from the fixed support plate 2, thereby adjusting the distance between the fixed support plate 2 and the movable support plate 3. It should be noted that the end of the lead screw extending outside the base 1 can be connected to a power device.

[0025] like Figure 1 , Figure 2 and Figure 6 As shown, both the fixed support plate 2 and the movable support plate 3 are provided with limiting holes for the linear moving component 53 to pass through. The central axis of the injection pipe 7 and the central axis of the sealing column 4 are parallel to the central axis of the limiting holes. The motor 51 is detachably connected to the fixed support plate 2 or the movable support plate 3.

[0026] It should be noted that, as described above, during the process of the position adjustment mechanism 5 pushing the sealing mechanism 6, located at the connection between the injection pipe 7, the sealing column 4, and the fluid connector, towards the fluid connector and making it tightly contact both ends of the fluid connector, the motor 51 drives the linear motion component 53 to extend towards the fluid connector via the reduction transmission component 52, and drives the pressure adjustment component 61, the pressure spring 63, the current-type pressure sensing component 64, and the pressure-bearing sealing component 62 to move in the same direction and at the same distance. When the pressure-bearing sealing component in the sealing mechanism 6... After the two ends of 62 are in close contact with the fluid connector, the displacement stops. At this time, the position adjustment mechanism 5 continues to push the pressure adjustment component 61 to continue moving, adjusting the deformation of the pressure spring 63 between the pressure adjustment component 61 and the pressure-bearing sealing component 62. After deformation, the pressure spring 63 generates a corresponding elastic force and applies it to the pressure-bearing sealing component 62. After the pressure-bearing sealing component 62 receives the force, it transmits it to the fluid connector, thereby adjusting the sealing pressure applied by the pressure-bearing sealing component 62 to the injection pipeline 7, the sealing column 4 and the connection of the fluid connector.

[0027] The speed reduction transmission assembly 52 includes a housing 5201, a first transmission shaft 5202, a second transmission shaft 5204, and a screw 5207 connected sequentially from top to bottom to the inner wall of the housing 5201, a first transmission gear 5203 connected to the first transmission shaft 5202, a second transmission gear 5205 and a third transmission gear 5206 connected to the second transmission shaft 5204, and a fourth transmission gear 5208 connected to the screw 5207. One end of the screw 5207 passes through the housing 5201 and extends into the linear motion assembly 53. The output shaft of the motor 51 extends into the housing 5201 and is connected to one end of the first transmission shaft 5202. The first transmission gear 5203 and the second transmission gear 5205 mesh with each other, and the third transmission gear 5206 meshes with the fourth transmission gear 5208. The linear motion assembly 53 is detachably connected to the housing 5201.

[0028] When the motor 51 drives the linear motion assembly 53 to extend toward the fluid connector via the reduction transmission assembly 52, the motor 51 drives the first transmission shaft 5202 to rotate. After the first transmission shaft 5202 rotates, it drives the first transmission gear 5203 connected to it to rotate. After the first transmission gear 5203 rotates, it drives the meshing second transmission gear 5205 to rotate. After the second transmission gear 5205 rotates, it drives the second transmission shaft 5204 and the third transmission gear 5206 connected to the second transmission shaft 5204 to rotate. After the third transmission gear 5206 rotates, it drives the meshing fourth transmission gear 5208 to rotate. After the fourth transmission gear 5208 rotates, it drives the screw 5207 connected to it to rotate in the same direction and at the same angle. After the screw 5207 rotates, it can drive the linear motion assembly 53 to move toward or away from the fluid connector, and drive the pressure adjustment assembly 61, the pressure spring 63, the current pressure sensing assembly 64, and the pressure sealing assembly 62 to move in the same direction and at the same distance.

[0029] The linear motion component 53 includes a hollow fixed outer sleeve 5301 detachably connected to the housing 5201, a hollow movable sleeve 5302 disposed within the hollow fixed outer sleeve 5301, a second limiting slider 5304, and a threaded sleeve 5303 connected to the inner wall of the hollow movable sleeve 5302. One end of the hollow movable sleeve 5302 is connected to the second limiting slider 5304, and the other end extends to the outside of the hollow fixed outer sleeve 5301 and is connected to the pressure adjustment component 61. The second limiting slider 5304 is slidably connected to the hollow fixed outer sleeve 5301. One end of the screw 5207 passes through the second limiting slider 5304 and is threadedly connected to the threaded sleeve 5303.

[0030] It should be noted that after the screw 5207 rotates, because the hollow movable sleeve 5302 is slidably connected to the hollow fixed outer sleeve 5301 through the second limit slider 5304, the threaded sleeve 5303 connected to the hollow movable sleeve 5302 cannot rotate in the same direction as the screw 5207. At this time, the screw 5207 can drive the threaded sleeve 5303 connected to it to move along the central axis of the screw 5207, and can move towards or away from the fluid connector. When the threaded sleeve 5303 moves, it drives the hollow movable sleeve 5302 connected to it to move in the same direction and at the same distance, and drives the pressure adjustment component 61 connected to it to move in the same direction and at the same distance.

[0031] Among them, such as Figure 2-5 As shown, the pressure adjustment assembly 61 includes a first ring plate 6101, a first L-shaped outer ring 6102, a first limiting ring 6104, and a first L-shaped inner ring 6103 connected to one side wall of the first ring plate 6101. The inner diameter of the first L-shaped outer ring 6102 is larger than the outer diameter of the first limiting ring 6104. The inner diameter of the first limiting ring 6104 is larger than the outer diameter of the first L-shaped inner ring 6103. The inner diameter of the first L-shaped inner ring 6103 is larger than the inner diameter of the first ring plate 6101. The inner diameter of the first ring plate 6101 is the same as the diameter of the injection pipe 7 or the sealing column 4. The first ring plate 6101 is provided with a through hole 6105.

[0032] The pressure-bearing sealing assembly 62 includes a second ring plate 6201, a second L-shaped outer ring 6202 connected to one side wall of the second ring plate 6201, a second limiting ring 6204, and a second L-shaped inner ring 6203. The inner diameter of the second L-shaped outer ring 6202 is larger than the outer diameter of the second limiting ring 6204, the inner diameter of the second limiting ring 6204 is larger than the outer diameter of the second L-shaped inner ring 6203, and the inner diameter of the second L-shaped inner ring 6203 is larger than the inner diameter of the second ring plate 6201. The inner diameter of the second ring plate 6201 is the same as the diameter of the pressure injection pipe 7 or the sealing column 4. The second L-shaped outer ring 6202 is slidably connected to the first L-shaped outer ring 6102, and the second L-shaped inner ring 6203 is slidably connected to the first L-shaped inner ring 6103.

[0033] It should be noted that a sealed space is formed between the first ring plate 6101, the first L-shaped outer ring 6102, the first L-shaped inner ring 6103, the second ring plate 6201, the second L-shaped outer ring 6202, and the second L-shaped inner ring 6203 in the pressure regulating assembly 61 and the pressure bearing regulating assembly. This space can effectively protect the pressure spring 63 and the current-type pressure sensing assembly 64 located therein, reducing the influence of external factors.

[0034] The connection between the current-type pressure sensing component 64 and the external circuit can be routed through the through-hole 6105 on the first ring plate 6101. As described above, when the pressure-bearing sealing component 62 in the sealing mechanism 6 comes into close contact with both ends of the fluid connector, it stops displacing. At this time, the position adjustment mechanism 5 continues to push the pressure adjustment component 61 to continue moving, adjusting the deformation of the pressure spring 63 between the pressure adjustment component 61 and the pressure-bearing sealing component 62. At this time, the pressure spring 63 generates a corresponding elastic force after deformation and applies it to the pressure-bearing sealing component 62. After the pressure-bearing sealing component 62 receives the force, it transmits it to the fluid connector, thereby adjusting the sealing pressure applied by the pressure-bearing sealing component 62 to the injection pipe 7, the sealing column 4 and the connection of the fluid connector. Specifically, the first ring plate 6101 moves toward the end face of the fluid connector under the push of the hollow movable sleeve 5302. At this time, the first ring plate 6101 pushes the second ring plate 6201 to move through the pressure spring 63 until the second ring plate 6201 contacts the end face of the fluid connector. At this time, the second ring plate 6201 is restricted and stops moving. The first ring plate 6101 continues to move and begins to squeeze the pressure spring 63. The pressure spring 63 begins to deform and generates a corresponding elastic force applied to the second ring plate 6201. After the second ring plate 6201 is subjected to force, it applies pressure to the end face of the fluid connector, that is, it applies pressure to seal the threaded connection between the fluid connector and the injection pipe or the threaded connection between the sealing column 4 and the fluid connector. The pressure is equal to the elastic force generated by the deformation of the pressure spring 63.

[0035] The compression spring 63 has two ends respectively located between the first L-shaped outer ring 6102 and the first limiting ring 6104, and between the second L-shaped outer ring 6202 and the second limiting ring 6204. It should be noted that the first L-shaped outer ring 6102 and the first limiting ring 6104, as well as the second L-shaped outer ring 6202 and the second limiting ring 6204, can limit the two ends of the compression spring 63, effectively preventing positional changes during deformation and improving the deformation stability of the compression spring 63.

[0036] Among them, such as Figure 4 , Figure 5 As shown, the current-type voltage sensing component 64 includes a variable resistance sensing component and a connecting rod 6408 connected to the variable resistance sensing component. One end of the connecting rod 6408 is connected to the second ring plate 6201, and the variable resistance sensing component is connected to the first L-shaped inner ring body 6103.

[0037] The variable resistance sensing assembly includes a support frame 6401, a first electrical connection 6402 connected to one side wall of the support frame 6401, a resistor 6403 and a metal rod 6404 connected to the inner wall of the support frame 6401, a second electrical connection 6405 connected to both ends of the metal rod 6404, a conductive slider 6406 slidably connected to the metal rod 6404, and an insulating slider 6407 connected to the conductive slider 6406. The metal rod 6404 is located above the resistor 6403 and the two are arranged parallel to each other. The conductive slider 6406 is in contact with the resistor 6403, and the resistor 6403 is electrically connected to the first electrical connection 6402. The insulating slider 6407 is connected to the other end of the connecting rod 6408.

[0038] It should be noted that when the pressure spring 63 is subjected to force and deforms, the positions of the variable resistance sensing component and the connecting rod 6408 in the current-type pressure sensing component 64 also change accordingly. During this process, the connecting rod 6408 drives the insulating slider 6407 to move, and the insulating slider 6407 drives the conductive slider 6406 to move along the metal rod 6404 in the same direction and distance. At this time, the position of the conductive slider 6406 on the resistor 6403 changes, and the resistance value of the resistor 6403 connected in the circuit changes. The deformation of the pressure spring 63 can be calculated by the change in current to calibrate the moving distance of the linear moving component 53 and prevent errors. When the second ring plate 6201 moves towards the first ring plate 6101 due to the leakage hydraulic pressure, the connecting rod 6408 moves again. As mentioned above, the resistance value of the resistor 6403 connected in the detection circuit changes again. The secondary deformation of the pressure spring 63 can be calculated based on this change value. That is, the actual leakage hydraulic pressure value of the second ring plate 6201 is also equal to the actual leakage hydraulic pressure value at the threaded connection. This facilitates the calculation of the installation preload when connecting fluid connectors in actual use.

[0039] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0040] 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. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0041] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A performance testing device for high-pressure fluid connectors, characterized in that: The device includes a base (1), a fixed support plate (2) fixedly connected to one end of the base (1), a movable support plate (3) slidably connected to the other end of the base (1), an injection pipe (7) movably connected to the fixed support plate (2), a sealing column (4) fixedly connected to the movable support plate (3), two position adjustment mechanisms (5), and a sealing mechanism (6) connected to one end of the position adjustment mechanism (5). The two position adjustment mechanisms (5) are respectively connected to the fixed support plate (2) and the movable support plate (3), and the two sealing mechanisms (6) are respectively sleeved on the injection pipe (7) and the sealing column (4). The injection pipe (7) and the sealing column (4) are both provided with external threads. The position adjustment mechanism (5) includes a motor (51), a speed reduction transmission assembly (52) connected to the housing of the motor (51), and a linear motion assembly (53) connected to the output end of the speed reduction transmission assembly (52). One end of the linear motion assembly (53) passes through the fixed support plate (2) or the movable support plate (3) and is connected to the corresponding sealing mechanism (6). The motor (51) drives the linear motion assembly (53) to move along the central axis of the injection pipe (7) through the speed reduction transmission assembly (52). The sealing mechanism (6) includes a pressure regulating component (61), a pressure-bearing sealing component (62) slidably connected to the pressure regulating component (61), and a pressure spring (63) and a current-type pressure sensing component (64) connected between the pressure regulating component (61) and the pressure-bearing sealing component (62). The pressure regulating component (61) is connected to the linear motion component (53) and is used to adjust the pressure applied by the pressure spring (63) to the pressure-bearing sealing component (62). The pressure-bearing sealing component (62) is used to seal the threaded connection between the injection pipe (7) or the sealing column (4) and the fluid connector. The current-type pressure sensing component (64) is used to detect the deformation of the pressure spring (63). The pressure adjustment assembly includes a first ring plate, a first L-shaped outer ring body connected to one side wall of the first ring plate, a first limiting ring body, and a first L-shaped inner ring body. The inner diameter of the first L-shaped outer ring body is larger than the outer diameter of the first limiting ring body, the inner diameter of the first limiting ring body is larger than the outer diameter of the first L-shaped inner ring body, the inner diameter of the first L-shaped inner ring body is larger than the inner diameter of the first ring plate, and the inner diameter of the first ring plate is the same as the diameter of the injection pipe or the sealing column. The first ring plate is provided with a perforation. The pressure-bearing sealing assembly includes a second ring plate, a second L-shaped outer ring body connected to one side wall of the second ring plate, a second limiting ring body, and a second L-shaped inner ring body. The inner diameter of the second L-shaped outer ring body is larger than the outer diameter of the second limiting ring body, the inner diameter of the second limiting ring body is larger than the outer diameter of the second L-shaped inner ring body, and the inner diameter of the second L-shaped inner ring body is larger than the inner diameter of the second ring plate. The inner diameter of the second ring plate is the same as the diameter of the injection pipe or sealing column. The second L-shaped outer ring body is slidably connected to the first L-shaped outer ring body, and the second L-shaped inner ring body is slidably connected to the first L-shaped inner ring body. The two ends of the compression spring are respectively located between the first L-shaped outer ring and the first limiting ring, and between the second L-shaped outer ring and the second limiting ring; The current-type voltage sensing component includes a variable resistance sensing component and a connecting rod connected to the variable resistance sensing component. One end of the connecting rod is connected to the second ring plate, and the variable resistance sensing component is connected to the first L-shaped inner ring body. The variable resistance sensing assembly includes a support frame, a first electrical connection terminal connected to one side wall of the support frame, a resistor and a metal rod connected to the inner wall of the support frame, a second electrical connection terminal connected to both ends of the metal rod, a conductive slider slidably connected to the metal rod, and an insulating slider connected to the conductive slider. The metal rod is located at the upper end of the resistor and the two are arranged parallel to each other. The conductive slider is in contact with the resistor, and the resistor is electrically connected to the first electrical connection terminal. The insulating slider is connected to the other end of the connecting rod.

2. The performance testing equipment for high-pressure fluid connectors according to claim 1, characterized in that: The base (1) is provided with a limiting slide groove (101), and a lead screw is movably connected to the inner wall of the limiting slide groove (101). The lower end of the movable support plate (3) is connected to a first limiting slider (301). The first limiting slider (301) is located in the limiting slide groove (101) and is threadedly connected to the lead screw. One end of the lead screw passes through the limiting slide groove (101) and extends to the outside of the base (1).

3. The performance testing equipment for high-pressure fluid connectors according to claim 2, characterized in that: Both the fixed support plate (2) and the movable support plate (3) are provided with limiting holes for the linear moving component (53) to pass through. The central axis of the injection pipe (7) and the central axis of the sealing column (4) are parallel to the central axis of the limiting holes. The motor (51) is detachably connected to the fixed support plate (2) or the movable support plate (3).

4. The performance testing equipment for high-pressure fluid connectors according to claim 3, characterized in that: The speed reduction transmission assembly includes a housing, a first transmission shaft, a second transmission shaft, and a screw, which are movably connected to the inner wall of the housing from top to bottom; a first transmission gear connected to the first transmission shaft; a second transmission gear and a third transmission gear connected to the second transmission shaft; and a fourth transmission gear connected to the screw. One end of the screw passes through the housing and extends into the linear motion assembly. The output shaft of the motor extends into the housing and is connected to one end of the first transmission shaft. The first and second transmission gears mesh with each other, and the third and fourth transmission gears mesh with each other. The linear motion assembly is detachably connected to the housing.

5. The performance testing equipment for high-pressure fluid connectors according to claim 4, characterized in that: The linear motion assembly includes a hollow fixed outer sleeve detachably connected to the housing, a hollow movable sleeve disposed within the hollow fixed outer sleeve, a second limiting slider, and a threaded sleeve connected to the inner wall of the hollow movable sleeve. One end of the hollow movable sleeve is connected to the second limiting slider, and its other end extends to the outside of the hollow fixed outer sleeve and is connected to the pressure adjustment assembly. The second limiting slider is slidably connected to the hollow fixed outer sleeve. One end of the screw passes through the second limiting slider and is threadedly connected to the threaded sleeve.

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