Hydraulic rubber hose assembly buckling pressure detection device and method thereof

Abstract

The present application relates to the technical field of rubber pipe pressure detection, in particular to a hydraulic rubber pipe assembly buckle pressure detection device and method, the detection device comprises: a base with opposite open ends and closed ends; joint, integrated in the closed end of the base, one end is used for connecting the connecting piece of the rubber pipe assembly, the other end is used for external connection medium source; sliding member, slidably arranged in the joint between the first position and the second position; fixed part, fixedly arranged in the joint. The present application through the linkage structure of sliding member and plug, in the process of rubber pipe assembly and joint butt joint, using the axial displacement generated by rubber pipe assembly insertion to automatically drive the plug from the avoidance state to the plugging state, so that when the rubber pipe assembly is completely connected, the plug is just plugged in the inner wall of the hose and located between the buckle pressure and the inside of the hose, so that the injected medium pressure only acts on the buckle connection of the connecting piece and the hose.

Description

Technical Field

[0001] This invention relates to the field of hose pressure testing technology, specifically to a pressure testing device for the crimping point of a hydraulic hose assembly, and the working method of the pressure testing device for the crimping point of a hydraulic hose assembly. Background Technology

[0002] In hydraulic transmission systems, hose assemblies, as key flexible connecting elements, are widely used for pressure transmission in various hydraulic equipment. Hose assemblies are typically fixed to hoses via a crimping process using connectors. The quality of the crimping connection directly determines the sealing and safety of the entire hydraulic system. Defects or insufficient sealing at the crimping point can easily lead to leakage or even bursting under high pressure, causing equipment failure or safety accidents. Therefore, pressure testing of the hose assembly crimping points is a crucial step in ensuring product quality and system safety.

[0003] In existing technologies, pressure testing of the crimping points of hose assemblies typically involves installing the entire hose assembly to the testing interface, injecting a pressurized medium into the hose, and observing whether leakage occurs at the crimping point. However, because the hose itself has a certain length and volume, the injected medium fills the entire hose, causing the testing pressure to be distributed across the entire length of the hose. On the one hand, this makes it difficult to accurately control the actual testing pressure borne by the crimping point, affecting the accuracy of the test results; on the other hand, the hose may expand radially or deform under pressure, interfering with the judgment of the sealing status of the crimping point, and even leading to misjudgment due to localized bulging of the hose. Summary of the Invention

[0004] This invention addresses the problems in the prior art by providing a pressure detection device and method for the crimping point of a hydraulic hose assembly. The specific technical solution is as follows: On one hand, this application provides a hydraulic hose assembly crimping pressure testing device for testing the hose assembly, the hose assembly including a connector and a flexible hose crimped to the connector, the testing device comprising: The base has an open end and a closed end; The connector is integrated into the closed end of the base, with one end for connecting to the connector of the hose assembly and the other end for connecting to an external medium source. A sliding element is slidably disposed within the connector between a first position and a second position; The fastener is fixedly installed inside the connector; A plug is connected to the fixing member. The plug has a blocking state and an avoidance state. When the sliding member moves between the first position and the second position, it can drive the plug to switch between the blocking state and the avoidance state. When the slider is in the first position, the plug is in the clearance state and its outer diameter is smaller than the inner diameter of the hose, so as to allow the hose assembly to be connected to the connector; When the slider is in the second position, the plug is in the blocking state and its outer diameter is larger than the inner diameter of the hose, so as to block the hose and restrict the flow of medium into the hose.

[0005] As a further technical solution of the present invention, a reset member is also included, which is disposed between the sliding member and the fixing member, and is used to apply a restoring force to the sliding member toward the first position.

[0006] As a further technical solution of the present invention, the sliding member includes an outer ring portion, a sliding rod, an extension shaft and a tapered drive head. The outer circumference of the outer ring portion matches the inner diameter of the connector and is used to contact the inserted connector and transmit axial thrust.

[0007] As a further technical solution of the present invention, the fixing member includes a ring portion and a cylindrical portion. The cylindrical portion has a hollow structure and a slide rail is provided along the axial direction. The outer ring portion is slidably sleeved outside the cylindrical portion. The slide rod is slidably disposed on the slide rail. The extension shaft and the conical drive head are placed inside the cylindrical portion.

[0008] As a further technical solution of the present invention, the plug includes a plurality of fan-shaped pieces and an elastic membrane arranged alternately along the circumference, and a skeleton connected between two adjacent fan-shaped pieces; when the conical drive head moves axially, it can drive all the fan-shaped pieces to radially retract or disperse, thereby allowing the plug to switch between the avoidance state and the blocking state.

[0009] As a further technical solution of the present invention, a sliding groove and a skeleton groove are formed on the fan-shaped piece, a slider is embedded in the sliding groove, and the slider is fixedly installed on the cylindrical part; one end of the skeleton is connected to one of the fan-shaped pieces, and the other end is slidably disposed in the skeleton groove on another adjacent fan-shaped piece.

[0010] As a further technical solution of the present invention, it also includes: A clamping ring is disposed at a position corresponding to the plug. The clamping ring includes a clamping state and a releasing state, and has multiple circumferentially distributed fan-shaped plates. A drive assembly is mounted on the connector and connected to the clamping ring for driving the clamping ring to switch between the clamping state and the releasing state; In the clamping state, all the sector plates converge inward, with their inner diameter smaller than the outer diameter of the hose, to cooperate with the plug in the sealing state to clamp and cause the hose to deform locally to form a seal; in the releasing state, all the sector plates disperse centrifugally to allow the hose assembly to be inserted or removed.

[0011] As a further technical solution of the present invention, a reserved groove is formed on the inner side of the fan-shaped plate to accommodate the deformed part of the hose in the clamping state.

[0012] As a further technical solution of the present invention, the driving assembly includes a plurality of driving cylinders and a medium channel connecting adjacent driving cylinders. The number and position of the driving cylinders correspond to the sector plates. The sector plates are installed at the output end of the driving cylinders. The medium channel is used to synchronously deliver driving medium to all the driving cylinders to achieve synchronous operation of all the sector plates.

[0013] On the other hand, the present invention also provides a method for operating the hydraulic hose assembly crimping pressure detection device, comprising the following steps: S1: In the initial state, the slider is located in the first position under the action of the reset member, and the plug is in a clearance state with a reduced outer diameter; S2: Insert the hose assembly to be tested into the open end of the base, so that the connector mates with the joint, and the connector pushes the sliding member to overcome the elastic force of the reset member and slide from the first position to the second position; S3: During the process of the slider sliding to the second position, the plug is driven to switch from the avoidance state to the blocking state. When the slider reaches the second position, the plug is completely switched to the blocking state, its outer diameter expands and blocks the inner wall of the hose, thereby separating the clamping part of the hose from the internal space of the hose. S4: Pressure medium is introduced into the hose assembly through the connector, and the medium acts on the crimp connection between the connector and the hose to perform pressure detection; S5: After the test is completed, the medium is discharged, the hose assembly is pulled out from the connector, the sliding member returns from the second position to the first position under the restoring force of the reset member, and at the same time the plug is driven to return from the blocking state to the avoidance state.

[0014] The beneficial effects of this invention are as follows: (1) This invention utilizes the linkage structure of the sliding component and the plug to automatically drive the plug from the avoidance state to the sealing state during the docking process of the hose assembly and the connector. Thus, when the hose assembly is fully connected, the plug is precisely sealed on the inner wall of the hose and located between the crimping point and the inside of the hose. This design achieves automated operation of "insertion and sealing", eliminating the need for additional manual sealing steps and significantly improving testing efficiency. At the same time, the sealing position of the plug corresponds precisely to the crimping point, so that the pressure of the injected medium only acts on the crimping connection between the connector and the hose, avoiding pressure dispersion along the entire length of the hose. This ensures that the crimping point bears precise and concentrated testing pressure, greatly improving the accuracy and reliability of the test results.

[0015] (2) By setting a reset component, the sliding component can be automatically reset after the hose assembly is pulled out, and the plug will return from the blocking state to the avoidance state, thus preparing for the next test. This realizes the cyclic self-reset function of the device, further simplifies the operation process, reduces the need for manual intervention, and is suitable for large-scale continuous testing scenarios.

[0016] (3) Through the cooperation structure of the conical drive head, the fan-shaped plate, the elastic membrane and the skeleton, the plug can form a complete annular sealing surface in the plugging state, which fits tightly with the inner wall of the hose and effectively prevents the leakage of the medium. At the same time, the radial contraction and dispersion of the fan-shaped plate is stable and reliable, and the sliding guide of the skeleton between adjacent fan-shaped plates ensures the synchronicity and consistency of the plug shape switching, which extends the service life of the device and improves the sealing stability.

[0017] (4) By adding a clamping ring and its driving components, while the plug seals the hose, the clamping ring retracts inward to apply clamping force to the outside of the hose, forming a double seal with the internal plug. At the same time, the clamping ring also accommodates the local deformation of the hose through the reserved groove, avoiding excessive expansion or bulging of the hose under high pressure, ensuring the stability of the hose shape during the test, and further improving the test accuracy and safety. Attached Figure Description

[0018] Figure 1 A schematic diagram of the overall structure of the pressure detection device at the crimping point of the hydraulic hose assembly is shown; Figure 2 A structural schematic diagram of the base, connector, and hose assembly is shown; Figure 3 A schematic diagram of the internal structure of the hose assembly is shown; Figure 4 A structural schematic diagram of the sliding component, fixing component, plug, and resetting component is shown; Figure 5 A schematic diagram of the slider in the first position is shown; Figure 6A schematic diagram of the slider in the second position is shown; Figure 7 A schematic diagram of the plug in the avoidance state is shown; Figure 8 A schematic diagram of the plug in the blocked state is shown; Figure 9 A schematic diagram of the clamping ring and drive assembly is shown. Figure 10 A schematic diagram of the reserved slot is shown. Attached image description: 10. Base; 20. Connector; 30. Hose assembly; 31. Connector; 32. Flexible hose; 40. Sliding element; 410. Outer ring portion; 420. Slide rod; 430. Extension shaft; 440. Conical drive head; 50. Fastener; 510. Ring; 520. Cylindrical section; 521. Slide rail; 60. End cap; 610. Sector-shaped piece; 611. Slide groove; 612. Slider; 613. Skeleton groove; 620. Elastic membrane; 630. Skeleton; 70. Reset component; 80. Clamping ring; 810. Sector plate; 811. Reserved slot; 90. Drive assembly; 910. Drive cylinder; 920. Medium channel. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0021] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0022] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Example This embodiment describes a pressure detection device for the crimping point of a hydraulic hose assembly, which is described below in conjunction with... Figures 1-10 Provide a detailed description.

[0024] Figures 1-3 The hydraulic hose assembly crimping pressure detection device includes: The base 10 is used to support the entire testing device and is easy to install on different carriers to adapt to different testing positions. The base 10 has a relatively open end and a closed end. The open end is used to cooperate with the insertion of the hose assembly 30. Connector 20 is integrated into the closed end of the base 10, and one end of connector 20 is connected to an external medium source; A hose assembly 30 is connected to the other end of the connector 20. The hose assembly 30 is inserted into the open end of the base 10 and connected to the connector 20. The other end of the connector 20 is used to input the medium and perform pressure testing on the hose assembly 30. The hose assembly 30 includes a connector 31 and a hose 32. One end of the connector 31 is connected to the connector 20, and the other end of the connector 31 is crimped to the hose 32. When the medium is input, the crimped joint of the connector 31 and the hose 32 will be compressed to perform pressure testing.

[0025] Figures 4-6 The hydraulic hose assembly crimping pressure detection device also includes: A sliding member 40 is slidably disposed within the connector 20 between a first position and a second position. The sliding member 40 cooperates with the hose assembly 30 to push the sliding member 40 toward the second position. The fastener 50 is fixedly disposed within the connector 20; A plug 60 is disposed at the end of the fixing member 50. The plug 60 includes a blocking state and an abduction state. When the sliding member 40 changes between a first position and a second position, it can drive the plug 60 to switch between the blocking state and the abduction state. When the sliding member 40 is in the first position, the plug 60 switches to the abduction state and its outer diameter is smaller than the inner diameter of the hose 32 to allow the connection between the connector 20 and the hose assembly 30. When the sliding member 40 is in the second position, the plug 60 switches to the blocking state and its outer diameter is larger than the inner diameter of the hose 32 to restrict the flow of medium into the hose 32. The reset member 70 cooperates with the sliding member 40 to apply a restoring force to the sliding member 40 towards the first position; the reset member 70 is pre-compressed and disposed between the sliding member 40 and the fixing member 50, so as to drive the sliding member 40 to return to the initial position after the connector 20 and the hose assembly 30 are separated. In this embodiment, the reset member 70 is a spring.

[0026] Based on the above, initially, connector 20 and hose assembly 30 are separated, and sliding member 40 is in the first position, such as... Figure 5 As shown, at this time, the plug 60 is in the avoidance state, allowing the connection of the hose assembly 30 and the connector 20. As the hose assembly 30 is connected to the connector 20, the sliding member 40 is pushed by the hose assembly 30 to slide from the first position to the second position. At the same time, the plug 60 switches from the avoidance state to the blocking state. When the connector 20 and the hose assembly 30 are fully connected, the sliding member 40 slides to the second position, and the plug 60 switches to the blocking state and blocks the hose assembly 30. It should be emphasized that the plug 60 is set in the hose 32 and close to its connection with the connector 31. This ensures that the connection between the connector 31 and the hose 32 can be connected to the medium, while preventing the medium from flowing into the hose 32 too long and affecting the detection.

[0027] Combination Figures 4-6The sliding member 40 includes an outer ring portion 410, a sliding rod 420, an extension shaft 430, and a conical drive head 440. The fixing member 50 includes a ring portion 510 and a cylindrical portion 520. The cylindrical portion 520 has a hollow structure, and a slide rail 521 is formed on the cylindrical portion 520 along the axial direction. The outer ring portion 410 is slidably fitted outside the cylindrical portion 520, and the outer circumference of the outer ring portion 410 matches the inner diameter of the connector 20. The sliding rod 420 is slidably disposed on the slide rail 521. The extension shaft 430 is placed inside the cylindrical portion 520. After the connector 20 and the hose assembly 30 are connected, The free end of the cylindrical portion 520 and the conical drive head 440 pass over the connection point of the connector 31 and the hose 32. When the connector 20 and the hose assembly 30 are connected, since the outer diameter of the outer ring portion 410 matches the inner diameter of the connector 20, the connector 31 can squeeze the outer ring portion 410 and drive the entire sliding member 40 to slide axially after entering the connector 20. The axial displacement generated when the connector 20 and the hose assembly 30 are connected is converted into a driving force to drive the plug 60 to switch states. At the same time, when the medium flows in, it can flow through the hollowed-out cylindrical portion 520 to the connection point of the connector 31 and the hose 32 to form a detection.

[0028] Figure 7 and Figure 8 In the process, the plug 60 includes alternating fan-shaped pieces 610 and elastic membranes 620 arranged circumferentially. A groove 611 is formed on the fan-shaped piece 610, and a slider 612 is embedded within the fan-shaped piece 610. The slider 612 is mounted on the cylindrical portion 520. A skeleton groove 613 is also formed on the outer periphery of the fan-shaped piece 610. When the conical drive head 440 slides axially, it drives the plug 60 to switch between an avoidance state and a blocking state. In the avoidance state, all the fan-shaped pieces 610 of the plug 60 move towards... When the plug 60 is in a sealed state, all the fan-shaped pieces 610 are centrifugally dispersed. The plug 60 also includes a skeleton 630 connected between two adjacent fan-shaped pieces 610. One end of the skeleton 630 is connected to the fan-shaped piece 610, and the other end is slidably disposed in a skeleton groove 613 on another adjacent fan-shaped piece 610. The elastic membrane 620 is laid flat between the two adjacent fan-shaped pieces 610, the skeleton 630 located between the two fan-shaped pieces 610, and the conical drive head 440.

[0029] Based on the above, when the connector 20 and the hose assembly 30 are connected, the conical drive head 440 is driven to move axially towards the connector 20, simultaneously releasing the elastic membrane 620. Its conical structure causes multiple fan-shaped plates 610 to centrifugally disperse, while the frame 630 slides out. Two adjacent fan-shaped plates 610, in conjunction with the frame 630, can unfold the enclosed elastic membrane 620. The circumferentially alternating fan-shaped plates 610 and the elastic membrane 620, together with the central conical drive head 440, form a... The complete sealing surface is used to block the hose 32, at which point the plug 60 is in a blocked state. After the complete test, the connector 20 and the hose assembly 30 gradually separate. The conical drive head 440 is driven by the reset member 70 to make axial displacement away from the connector 20, while pulling the elastic membrane 620. The elastic membrane 620 drives multiple fan-shaped pieces 610 to converge towards the center, and the skeleton 630 will slide into the skeleton groove 613. The outer diameter of the entire plug 60 decreases to allow the separation of the connector 20 and the hose assembly 30.

[0030] It should be noted that in this embodiment... Figure 7 and Figure 8 In this embodiment, the conical drive head 440 is a conical truncated pyramid structure, and the inner side of the fan-shaped plate 610 is also a matching straight line structure. However, in some other embodiments, the conical drive head 440 can also be a conical cylindrical structure, and the inner side of the fan-shaped plate 610 can also be a matching arc structure. It is important to emphasize that the conical drive head 440 and the inner side of the fan-shaped plate 610 can form a mutually matching sealing state in the blocking state.

[0031] Figure 9 and Figure 10 The hydraulic hose assembly crimping pressure detection device also includes: A clamping ring 80 includes multiple circumferentially distributed sector plates 810. The position of the clamping ring 80 corresponds to the plug 60. The clamping ring 80 includes a clamping state and a releasing state. In the clamping state, all sector plates 810 converge to cooperate with the plug 60 in the sealing state to seal the hose 32. In the clamping state, the inner diameter of the clamping ring 80 is smaller than the outer diameter of the hose 32. In the releasing state, all sector plates 810 disperse centrifugally. A reserved groove 811 is formed on the inner side of the sector plate 810. In the clamping state, the hose 32 deforms and fills into the reserved groove 811. The drive assembly 90 includes drive cylinders 910 corresponding in number and position to the sector plate 810. The drive cylinders 910 are mounted on the connector 20. The sector plate 810 is mounted on the output end of the drive cylinder 910. A medium channel 920 is connected between two adjacent drive cylinders 910 to enable all the drive cylinders 910 to communicate with each other.

[0032] Hydraulic medium can be synchronously input to all drive cylinders 910 through the medium channel 920 to control the synchronous operation of all drive cylinders 910, that is, the output ends of all drive cylinders 910 extend or retract synchronously, thereby controlling the clamping ring 80 to switch between clamping and releasing states. When the output ends of all drive cylinders 910 extend synchronously, all sector plates 810 retract concentrically, and the clamping ring 80 is in the clamping state. It can cooperate with the plug 60 in the sealing state to force the hose 32 to deform, ensuring the sealing effect. The deformed part fills into the reserved groove 811 to prevent the hose from undergoing uncontrollable radial expansion under high pressure, thereby ensuring the stability of the hose shape during the testing process. When the output ends of all drive cylinders 910 retract synchronously, all sector plates 810 disperse centrifugally. At this time, the clamping ring 80 is in the releasing state, and it can cooperate with the plug 60 in the avoidance state to allow the separation and docking of the connector 20 and the hose assembly 30.

[0033] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it.

Claims

1. A hydraulic hose assembly crimping pressure detection device, used to detect pressure on the hose assembly, the hose assembly including a connector and a flexible tube crimped to the connector, characterized in that, The detection device includes: The base has an open end and a closed end; The connector is integrated into the closed end of the base, with one end for connecting to the connector of the hose assembly and the other end for connecting to an external medium source. A sliding element is slidably disposed within the connector between a first position and a second position; The fastener is fixedly installed inside the connector; A plug is connected to the fixing member. The plug has a blocking state and an avoidance state. When the sliding member moves between the first position and the second position, it can drive the plug to switch between the blocking state and the avoidance state. When the slider is in the first position, the plug is in the clearance state and its outer diameter is smaller than the inner diameter of the hose, so as to allow the hose assembly to be connected to the connector; When the slider is in the second position, the plug is in the blocking state and its outer diameter is larger than the inner diameter of the hose, so as to block the hose and restrict the flow of medium into the hose.

2. The hydraulic hose assembly crimping pressure detection device according to claim 1, characterized in that, It also includes a reset member disposed between the slider and the fixing member, which is used to apply a restoring force to the slider toward the first position.

3. The hydraulic hose assembly crimping pressure detection device according to claim 2, characterized in that, The sliding element includes an outer ring portion, a slide rod, an extension shaft, and a tapered drive head. The outer circumference of the outer ring portion matches the inner diameter of the connector and is used to contact the inserted connector and transmit axial thrust.

4. The hydraulic hose assembly crimping pressure detection device according to claim 3, characterized in that, The fastener includes a ring portion and a cylindrical portion. The cylindrical portion has a hollow structure and a slide rail is provided along the axial direction. The outer ring portion is slidably sleeved outside the cylindrical portion. The slide rod is slidably disposed on the slide rail. The extension shaft and the conical drive head are placed inside the cylindrical portion.

5. The hydraulic hose assembly crimping pressure detection device according to claim 3, characterized in that, The plug includes multiple fan-shaped pieces and an elastic membrane arranged alternately along the circumference, as well as a skeleton connecting two adjacent fan-shaped pieces; when the conical drive head moves axially, it can drive all the fan-shaped pieces to radially retract or disperse, thereby allowing the plug to switch between the avoidance state and the blocking state.

6. The hydraulic hose assembly crimping pressure detection device according to claim 5, characterized in that, The fan-shaped piece has a sliding groove and a skeleton groove. A slider is embedded in the sliding groove and the slider is fixedly installed on the cylindrical part. One end of the skeleton is connected to one of the fan-shaped pieces, and the other end is slidably disposed in the skeleton groove on another adjacent fan-shaped piece.

7. The hydraulic hose assembly crimping pressure detection device according to claim 6, characterized in that, Also includes: A clamping ring is disposed at a position corresponding to the plug. The clamping ring includes a clamping state and a releasing state, and has multiple circumferentially distributed fan-shaped plates. A drive assembly is mounted on the connector and connected to the clamping ring for driving the clamping ring to switch between the clamping state and the releasing state; In the clamping state, all the sector plates converge inward, with their inner diameter smaller than the outer diameter of the hose, to cooperate with the plug in the sealing state to clamp and cause the hose to deform locally to form a seal; in the releasing state, all the sector plates disperse centrifugally to allow the hose assembly to be inserted or removed.

8. The hydraulic hose assembly crimping pressure detection device according to claim 7, characterized in that, The inner side of the sector plate has a reserved groove for accommodating the deformed portion of the hose in the clamping state.

9. The hydraulic hose assembly crimping pressure detection device according to claim 6, characterized in that, The drive assembly includes multiple drive cylinders and a medium channel connecting adjacent drive cylinders. The number and position of the drive cylinders correspond to the sector plates. The sector plates are installed at the output end of the drive cylinders. The medium channel is used to synchronously deliver drive medium to all drive cylinders to achieve synchronous operation of all sector plates.

10. The method of operating the hydraulic hose assembly crimping pressure detection device according to any one of claims 1-9, characterized in that, Includes the following steps: S1: In the initial state, the slider is located in the first position under the action of the reset member, and the plug is in a clearance state with a reduced outer diameter; S2: Insert the hose assembly to be tested into the open end of the base, so that the connector mates with the joint, and the connector pushes the sliding member to overcome the elastic force of the reset member and slide from the first position to the second position; S3: During the process of the slider sliding to the second position, the plug is driven to switch from the avoidance state to the blocking state. When the slider reaches the second position, the plug is completely switched to the blocking state, its outer diameter expands and blocks the inner wall of the hose, thereby separating the clamping part of the hose from the internal space of the hose. S4: Pressure medium is introduced into the hose assembly through the connector, and the medium acts on the crimp connection between the connector and the hose to perform pressure detection; S5: After the test is completed, the medium is discharged, the hose assembly is pulled out from the connector, the sliding member returns from the second position to the first position under the restoring force of the reset member, and at the same time the plug is driven to return from the blocking state to the avoidance state.

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