A nozzle quick-change structure

Abstract

This invention relates to the field of quick-change structure technology, providing a nozzle quick-change structure for rapid assembly and disassembly of the nozzle and mounting base. The structure includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle, and the locking disc is rotatably connected to the mounting base. One side of the locking disc has a spiral-shaped locking groove with a notch communicating with its outer circumferential surface, allowing the locking pin to be inserted into the groove. When the locking disc rotates in one direction, it presses the locking pin firmly. The outer circumferential surface of the locking disc has ratchet teeth, and a pawl is located on one side of the locking disc and connected to the mounting base. When the locking pin is pressed, the pawl and ratchet teeth engage to restrict the locking disc from rotating in the opposite direction. This invention effectively solves the problems of cumbersome assembly and disassembly and the long time consumption associated with traditional screw connections, ensuring connection stability and significantly improving the efficiency of nozzle replacement during inspection operations.

Description

Technical Field

[0001] This invention relates to the field of quick-change structure technology, and more specifically, to a nozzle quick-change structure. Background Technology

[0002] In a water-jet automated ultrasonic non-destructive testing system, a nozzle is used to spray a jet of water as a coupling agent between the ultrasonic probe and the workpiece being tested, enabling the ultrasonic energy to penetrate.

[0003] Various nozzle structure designs already exist in the prior art. For example, the non-guided laminar flow water column nozzle disclosed in patent publication number "CN120515606A" includes a main structure (i.e., nozzle body, holder, and filter element) and a nozzle assembly (i.e., nozzle head and connecting flange), such as... Figure 1 As shown, the two parts are connected together and then fixed to the mounting base, which contains an ultrasonic probe (not shown). In practical applications, to accommodate workpieces of different materials, shapes, or testing requirements, it is often necessary to replace the ultrasonic probe inside the mounting base, thus requiring frequent disassembly and installation of the nozzle.

[0004] However, in the existing technology, the nozzle is usually connected and fixed to the mounting base by fasteners (such as screws). When replacing it, multiple fasteners need to be disassembled and installed. Although this connection method is stable, in situations where the probe needs to be replaced repeatedly, the operation process is cumbersome and time-consuming, which affects the detection efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a quick-change nozzle structure to overcome the above-mentioned defects of the prior art.

[0006] This invention is achieved through the following technical solution:

[0007] A quick-change nozzle structure for rapid assembly and disassembly of the nozzle and mounting base includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle, and the locking disc is rotatably connected to the mounting base. One side of the locking disc has a spiral-shaped locking groove with a notch communicating with the outer peripheral surface, so that the locking pin can be inserted into the locking groove. When the locking disc rotates in one direction, it can press the locking pin tightly. The outer peripheral surface of the locking disc has ratchet teeth, and the pawl is located on one side of the locking disc and connected to the mounting base, so that when the locking pin is pressed tightly, the pawl and ratchet teeth cooperate to restrict the reverse rotation of the locking disc.

[0008] Furthermore, the ratchet covers part of the outer peripheral surface of the lock disc, and the portion of the outer peripheral surface of the lock disc without the ratchet is provided with a limiting block that abuts against both ends of the pawl.

[0009] Furthermore, a rotating shaft is fixed on the mounting base, and the locking disc is sleeved on the rotating shaft.

[0010] Furthermore, two annular grooves are provided axially on the rotating shaft, and a spring plunger that can cooperate with the annular groove is provided inside the locking disc; when the spring plunger extends into one of the annular grooves, the ratchet tooth and the pawl cooperate; when the spring plunger extends into the other annular groove, the ratchet tooth and the pawl are misaligned.

[0011] Furthermore, the rotating shaft has a connecting through hole at its center, and the mounting base has a threaded hole corresponding to the connecting through hole. The connecting through hole and the threaded hole are connected by screws.

[0012] Furthermore, the mounting base has a pawl seat on one side of the lock disc, and the pawl seat has a blind mounting hole on the side near the lock disc, with the pawl located inside the blind mounting hole.

[0013] Furthermore, the end of the notch is provided with a guide slope.

[0014] Furthermore, the lock disc is connected to a knob.

[0015] Furthermore, the lock disc is provided with an arrow marking to indicate the locking direction.

[0016] This embodiment also provides a nozzle quick-change structure for another purpose, used to achieve quick assembly and disassembly of the main structure and the nozzle assembly. It includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle assembly, and the locking disc is rotatably connected to the main structure. One side of the locking disc has a spiral-shaped locking groove with a notch that communicates with the outer peripheral surface, so that the locking pin can be inserted into the locking groove. When the locking disc rotates in one direction, the side wall of the locking groove can press the locking pin tightly. The outer peripheral surface of the locking disc has ratchet teeth, and the pawl is located on one side of the locking disc and connected to the main structure, so that when the locking pin is pressed tightly, the pawl and ratchet teeth cooperate to restrict the reverse rotation of the locking disc.

[0017] The technical solution of the present invention has at least the following advantages and beneficial effects: In the present invention, the spiral locking groove on the locking disc cooperates with the locking pin on the nozzle. When the locking disc rotates in one direction, the locking pin is continuously pressed by the side wall of the locking groove, thereby achieving rapid locking between the nozzle and the mounting base. At the same time, combined with the cooperation between the ratchet teeth on the outer periphery of the locking disc and the pawl on the mounting base, the reverse rotation of the locking disc is automatically restricted in the locked state. This effectively solves the problem of cumbersome disassembly and assembly and long time consumption of traditional screw connection methods, ensuring connection stability and significantly improving the efficiency of nozzle replacement in inspection operations. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a nozzle is provided for the present technology; Figure 2 This is a schematic diagram of a nozzle quick-change structure provided by the present invention; Figure 3 This is a schematic diagram of the installation structure of the locking pin and the rotating shaft; Figure 4This is a schematic diagram of the front structure of the lock disc; Figure 5 This is a schematic diagram of the back structure of the lock disc; Figure 6 This is a schematic diagram of the connection structure between the rotating shaft and the locking disc; Reference numerals: 1-locking disc, 101-locking groove, 1011-notch, 102-racket, 103-limiting block, 104-mounting through hole, 2-pawl, 3-locking pin, 4-rotating shaft, 5-spring plunger, 6-pawl seat, 7-knob, 8-nozzle, 801-main structure, 8011-nozzle body, 8012-card seat, 7013-filter element, 802-nozzle assembly, 8021-nozzle head, 8022-connecting flange, 9-mounting base. Detailed Implementation

[0019] refer to Figures 2-5 A quick-change structure for nozzle 8 is used to achieve quick assembly and disassembly of nozzle 8 and mounting base 9. It includes locking disc 1, pawl 2 and locking pin 3. Locking pin 3 is fixedly set on nozzle 8 (the fixing method is not limited, such as interference fit, bonding, etc.). Locking disc 1 is rotatably connected to mounting base 9. Locking disc 1 has a locking groove 101 on one side. Locking groove 101 is spiral in shape, that is, the trajectory line of locking groove 101 gradually approaches the center of locking disc 1. Locking groove 101 has a notch 1011 that connects to the outer peripheral surface.

[0020] In practical applications, the locking disc 1 is symmetrically arranged on both sides of the mounting base 9 to ensure installation stability. During installation, the locking disc 1 is rotated until the notch 1011 is parallel to the axis of the nozzle 8, and the nozzle 8 is fitted onto the mounting base 9 (while the locking pin 3 is inserted into the locking groove 101). Then, the locking disc 1 is rotated in one direction, and the spiral locking groove 101 gradually presses the locking pin 3 tightly. After the locking pin 3 is pressed tightly, the axial relative position between the nozzle 8 and the mounting base 9 is ensured.

[0021] The outer circumferential surface of the lock disc 1 is provided with ratchet teeth 102, and pawl 2 is located on one side of the lock disc 1 and connected to the mounting base 9. When the lock pin 3 is pressed, the pawl 2 can cooperate with the ratchet teeth 102 to restrict the lock disc 1 from rotating in the reverse direction. Those skilled in the art should understand that the cooperation between the pawl 2 and the ratchet teeth 102 can only restrict the lock disc 1 to the unlocking direction. At the same time, the pawl 2 should be connected to a spring (not shown) to ensure that the lock disc 1 can rotate in the locking direction.

[0022] Based on the above, it can be seen that the present invention uses the spiral locking groove 101 provided on the locking disc 1 to cooperate with the locking post 3 on the nozzle 8. When the locking disc 1 rotates in one direction, the locking post 3 is continuously pressed by the side wall of the locking groove 101, thereby realizing the rapid locking of the nozzle 8 and the mounting base 9. At the same time, combined with the cooperation of the ratchet 102 on the outer periphery of the locking disc 1 and the pawl 2 on the mounting base 9, the reverse rotation of the locking disc 1 is automatically restricted in the locked state. This effectively solves the problem of cumbersome disassembly and assembly and long time consumption of the traditional screw connection method, which not only ensures the connection stability, but also significantly improves the efficiency of changing the nozzle 8 in the inspection operation.

[0023] The locking disc 1 is connected to a knob 7, which allows the locking disc 1 to be rotated by applying rotational torque by squeezing the knob 7. The locking disc 1 is provided with arrow markings to indicate the locking and unlocking directions, making the operation more convenient for the operator.

[0024] A pawl seat 6 is provided on one side of the locking disc 1 on the mounting base 9. Specifically, the pawl seat 6 is fixed to the mounting base 9 by screws. The side of the pawl seat 6 near the locking disc 1 has a blind mounting hole, and the pawl 2 is located in the blind mounting hole. Those skilled in the art should understand that the toothless side of the pawl 2 is located in the blind mounting hole, and the toothed side extends out of the blind mounting hole under the action of the spring to engage with the ratchet 102.

[0025] In this embodiment, the ratchet 102 covers part of the outer peripheral surface of the lock disc 1. The portion of the outer peripheral surface of the lock disc 1 without the ratchet 102 is provided with a limiting block 103 that abuts against both ends of the pawl 2. It is worth noting that in practical applications, the limiting block 103 can serve as an unlocking limit. Designed so that in the unlocked state, the limiting block 103 abuts against one end of the pawl 2, at which point the locking pin 3 can be easily removed from the notch 1011 of the lock groove 101. This design makes operation more convenient. In this embodiment, the end of the notch 1011 is provided with a guide slope for guiding purposes.

[0026] In this embodiment, the locking disc 1 is rotated as follows: a rotating shaft 4 is fixedly mounted on the mounting base 9, and the locking disc 1 is sleeved on the rotating shaft 4. In other embodiments, the locking disc 1 can of course be rotated and installed in other ways. As an alternative, the rotating shaft 4 is fixed in the following way in this embodiment: a connecting through hole is provided at the center of the rotating shaft 4, and a threaded hole is provided at the corresponding location of the connecting through hole on the mounting base 9. The connecting through hole and the threaded hole are connected by screws to achieve the fixed installation of the rotating shaft 4. In other embodiments, the rotating shaft 4 can of course be fixed in other ways.

[0027] refer to Figure 6Based on the above, in this embodiment, two annular grooves are provided axially at intervals on the rotating shaft 4. The locking disc 1 is equipped with a spring plunger 5 that can engage with the annular grooves. Specifically, the outer circumferential surface of the locking disc 1 is provided with a mounting through hole 104 for installing the spring plunger 5, and the spring plunger 5 is installed in the mounting through hole 104. When the spring plunger 5 extends into one of the annular grooves, the ratchet 102 engages with the pawl 2; when the spring plunger 5 extends into the other annular groove, the ratchet 102 and the pawl 2 are misaligned. It is easy to understand that in practical applications, the locking disc 1 can both rotate around the rotating shaft 4 and move axially along the rotating shaft 4. Under the action of the spring plunger 5 engaging with the annular groove, the locking disc 1 will not easily move axially. Under normal use, the ratchet 102 remains engaged with the pawl 2. When unlocking is required, the locking disc 1 is pulled outwards, causing the ratchet 102 and the pawl 2 to misalign (while the spring plunger 5 engages with the other annular groove), after which the locking disc 1 can rotate in the unlocking direction.

[0028] This embodiment also provides a quick-change nozzle 8 structure for another purpose, used to achieve quick assembly and disassembly of the main structure 801 and the nozzle assembly 802, facilitating rapid replacement of the nozzle assembly 802 according to different workpieces being inspected. It is easy to understand that the specific composition of the quick-change nozzle 8 structure remains unchanged, still including a locking disc 1, a pawl 2, and a locking pin 3; only the locking pin 3 is fixed to the nozzle assembly 802, while the locking disc 1 and the pawl 2 are located on the main structure 801.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A nozzle quick-change structure for quickly assembling and disassembling the nozzle from the mounting base, characterized in that, It includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle, and the locking disc is rotatably connected to the mounting base. One side of the locking disc has a spiral-shaped locking groove with a notch that connects to the outer peripheral surface so that the locking pin can be inserted into the groove. When the locking disc rotates in one direction, it can press the locking pin tightly. The outer peripheral surface of the locking disc has ratchet teeth, and the pawl is located on one side of the locking disc and connected to the mounting base so that when the locking pin is pressed, the pawl and ratchet teeth cooperate to restrict the reverse rotation of the locking disc.

2. The nozzle quick-change structure according to claim 1, characterized in that, The ratchet covers part of the outer peripheral surface of the lock disc, and the portion of the outer peripheral surface of the lock disc without the ratchet is provided with a limiting block that can abut against both ends of the pawl.

3. The nozzle quick-change structure according to claim 1, characterized in that, A rotating shaft is fixed on the mounting base, and the locking disc is sleeved on the rotating shaft.

4. The nozzle quick-change structure according to claim 3, characterized in that, The rotating shaft has two annular grooves spaced apart along the axial direction. The lock disc has a spring plunger inside that can cooperate with the annular grooves. When the spring plunger is inserted into one of the annular grooves, the ratchet tooth and the pawl cooperate. When the spring plunger is inserted into the other annular groove, the ratchet tooth and the pawl are misaligned.

5. The nozzle quick-change structure according to claim 3, characterized in that, The rotating shaft has a connecting through hole at its center, and the mounting base has a threaded hole corresponding to the connecting through hole. The connecting through hole and the threaded hole are connected by screws.

6. The nozzle quick-change structure according to any one of claims 1-5, characterized in that, The mounting base has a pawl seat on one side of the lock disc, and the pawl seat has a blind mounting hole on the side near the lock disc, with the pawl located inside the blind mounting hole.

7. The nozzle quick-change structure according to any one of claims 1-5, characterized in that, The end of the notch is provided with a guide slope.

8. The nozzle quick-change structure according to any one of claims 1-5, characterized in that, The lock disc is connected to a knob.

9. The nozzle quick-change structure according to any one of claims 1-5, characterized in that, The lock disc is provided with an arrow marking to indicate the locking direction.

10. A nozzle quick-change structure for quickly assembling and disassembling the main structure and the nozzle assembly, characterized in that, It includes a locking disc, a pawl, and a locking pin. The locking pin is fixed to the nozzle assembly, and the locking disc is rotatably connected to the main structure. One side of the locking disc has a spiral-shaped locking groove with a notch that connects to the outer peripheral surface so that the locking pin can be inserted into the groove. When the locking disc rotates in one direction, the side wall of the groove can press the locking pin tightly. The outer peripheral surface of the locking disc has ratchet teeth, and the pawl is located on one side of the locking disc and connected to the main structure so that when the locking pin is pressed, the pawl and ratchet teeth cooperate to restrict the reverse rotation of the locking disc.

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