A valve body detection device for producing threaded cartridge valves

Abstract

The invention relates to the technical field of valve processing and detection, and discloses a valve body detection device for producing threaded cartridge valves, comprising a magnetic particle flaw detection module, the magnetic particle flaw detection module comprising a mounting frame, a magnetic particle circulation mechanism, a propulsion mechanism, a loading mechanism, a baffle and a magnetic particle collection auxiliary mechanism, wherein in the loading mechanism, an electric push rod pushes a second contact plate to move toward a first contact plate, and the valve body is clamped between the first contact plate and the second contact plate, and when flaw detection is performed after the clamping is completed, as the slide seat moves, the driving gear meshes with the rack, and the driving gear immediately drives the second rotating shaft to rotate, and since the driving bevel gear meshes with the driven bevel gear, the torque of the second rotating shaft is transmitted to the first rotating shaft, thereby driving the first rotating shaft to rotate, driving the valve body to rotate while moving, and effectively eliminating the adverse effect that the valve body of the threaded cartridge valve after magnetization treatment is difficult to be completely covered when receiving magnetic powder.

Description

Technical Field

[0001] The invention relates to the technical field of valve processing and detection, and more specifically, to a valve body detection device for producing threaded cartridge valves. Background Art

[0002] The threaded cartridge valve uses liquid as the medium. In the hydraulic system, it can adjust and control the fluid direction, flow, pressure and other oil circuit actions through mechanical or electrical means. Its installation form is a threaded hydraulic actuator.

[0003] The shell part of the cartridge valve is called the valve body, which is produced by a casting process. The surface of the cast valve body may have some defects such as cracks and gaps. It is necessary to perform flaw detection on the surface of the valve body to determine the location of the defects and then repair them. In the prior art, magnetic particle flaw detection is usually used for detection.

[0004] The principle of magnetic particle inspection is that after a normal workpiece is magnetized, the magnetic flux is evenly distributed at different points on the workpiece. If there is a crack on the workpiece surface, magnetic flux leakage will occur at the crack, forming abnormally distributed magnetic flux lines. When the magnetic powder is sprayed onto the workpiece surface, the leaked magnetic flux lines will attract the magnetic powder to gather. By observing the distribution of the magnetic powder attached to the workpiece surface, the direction of the crack can be determined.

[0005] When testing, the magnetic powder needs to be evenly sprayed on the valve body surface, refer to Figure 7 The valve body of the cartridge valve is cylindrical in shape, which makes it difficult to completely cover the surface of the valve body with magnetic powder during actual inspection, resulting in certain omissions during inspection. This has become a technical problem that needs to be urgently solved in this field. Summary of the invention

[0006] The present invention provides a valve body detection device for producing threaded cartridge valves, which solves the technical problem in the related art that the valve body surface is difficult to be completely covered by magnetic powder, resulting in certain omissions during detection.

[0007] The present invention provides a valve body detection device for producing threaded cartridge valves, including a magnetic particle flaw detection module;

[0008] The magnetic particle flaw detection module includes a mounting frame, a magnetic powder circulation mechanism, a propulsion mechanism, a loading mechanism, a baffle and a magnetic powder collection auxiliary mechanism. A magnetic powder circulation mechanism is fixedly arranged on one side of the mounting frame, and the magnetic powder circulation mechanism drives the magnetic powder to circulate in a U-shaped trajectory. A propulsion mechanism is fixedly loaded on the bottom side of the magnetic powder circulation mechanism. A magnetic powder outlet is arranged on the top side of the magnetic powder circulation mechanism, and a baffle is arranged at the magnetic powder outlet. The propulsion mechanism includes a slide seat. Under the action of the propulsion mechanism, the slide seat reciprocates along the bottom side of the magnetic powder circulation mechanism. The top of the slide seat is fixedly connected to the loading mechanism. The magnetized threaded cartridge valve body is loaded on the loading mechanism and moves and rotates with the slide seat. A magnetic powder collection auxiliary module is arranged at the bottom of the slide seat, and the magnetic powder collection auxiliary module cooperates with the inside of the magnetic powder circulation mechanism.

[0009] As a further solution of the present invention: the magnetic powder circulation mechanism includes a channel, a slot, an air pump, a powder outlet and a blower, the channel is U-shaped, a powder outlet is provided on one side of the top of the channel and is vertically aligned with the loading mechanism, slots are symmetrically provided on one side of the bottom of the channel, an air pump is installed on the channel, the air pump generates negative pressure on the slot side and positive pressure on the powder outlet side, a blower is installed on the top of the channel facing the powder outlet, and the air supply direction of the blower is vertically downward.

[0010] As a further solution of the present invention: the baffle forms a semi-enclosed space for the magnetic powder outlet.

[0011] As a further solution of the present invention: the loading mechanism includes a bracket, a rack, a first rotating shaft, a first resistance plate, a driven wheel bevel gear, a second rotating shaft, a driving gear, an active bevel gear, an electric push rod, a second resistance plate and a bearing. The bracket is fixedly installed on the slide seat, and a rack is fixedly arranged in the mounting frame. A first rotating shaft is rotatably arranged on one side of the bracket, and a first resistance plate is fixedly arranged on the end of the first rotating shaft. A driven bevel gear is fixedly sleeved on the first rotating shaft, a second rotating shaft is rotatably arranged on the bracket, a driving gear is fixedly sleeved on the second rotating shaft, the driving gear is meshed with the rack, an active bevel gear is fixedly sleeved on the end of the second rotating shaft, and the active bevel gear is meshed with the driven wheel bevel gear, an electric push rod is arranged on the bracket, a second resistance plate horizontally aligned with the first resistance plate is fixedly arranged on the output end of the electric push rod, and the electric push rod is connected to the bracket through a bearing.

[0012] As a further solution of the present invention: the surfaces of the first abutment disc and the second abutment disc are provided with textures.

[0013] As a further solution of the present invention: the magnetic powder collection auxiliary mechanism includes a connecting frame, a servo, a scraper, a first sensor, and a second sensor. The bottom of the slide is fixedly provided with a connecting frame, the connecting frame is arranged to penetrate the channel, and a servo is installed on one end of the connecting frame extending into the channel. A scraper is installed on the output end of the servo, and the scraper is in extrusion contact with the inner wall of the channel. A first sensor is installed on one side of the bottom of the channel, and a second sensor is installed on the other side. The servo cooperates with the first sensor and the second sensor to form different rotation states by being close to the first sensor and the second sensor.

[0014] The beneficial effects of the present invention are:

[0015] In the loading mechanism, the valve body is first placed in the gap between the first and second discs, and then the second disc is pushed toward the first disc by the electric push rod to clamp the valve body between the first and second discs. During the clamping process, it is necessary to maintain coaxial clamping synchronously, that is, the central axis of the first disc, the second disc and the valve body are located on the same straight line. When flaw detection is performed after the clamping is completed, as the slide moves, the driving gear engages with the rack, and the driving gear drives the second shaft to rotate. Since the driving bevel gear engages with the driven bevel gear, the torque of the second shaft is transmitted to the first shaft, thereby driving the first shaft to rotate, driving the valve body to rotate while moving, effectively eliminating the adverse effect that the valve body of the magnetized threaded cartridge valve is difficult to be fully covered when receiving magnetic powder.

[0016] In the magnetic powder collection auxiliary mechanism, the scraper keeps moving from the powder attachment area to the repair area. Figure 7 The scraper is in the unfolded posture, and the collected magnetic powder in the channel is scraped and concentrated to the corner of the channel to shorten the path of the negative pressure absorption of the air pump to promote the concentrated collection of the magnetic powder. This is called a process until it approaches the first sensor, and the servo drives the scraper to fold to a horizontal state. In this way, during the return process, the scraper cancels the scraping effect on the inner wall of the channel and will not push the magnetic powder in the reverse direction. At the end of the return journey, it approaches the second sensor, and the servo drives the scraper to rotate back to a vertical state to provide a scraping and collection effect for the next process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of a magnetic particle flaw detection module in a valve body detection device for producing threaded cartridge valves proposed by the present invention;

[0018] Figure 2 It is a schematic diagram of the front structure of a magnetic particle flaw detection module in a valve body detection device for producing threaded cartridge valves proposed by the present invention;

[0019] Figure 3 It is a partial structural schematic diagram of a magnetic powder circulation mechanism in a valve body detection device for producing threaded cartridge valves proposed by the present invention;

[0020] Figure 4 It is a detailed structural diagram of a magnetic powder circulation mechanism in a valve body detection device for producing threaded cartridge valves proposed by the present invention;

[0021] Figure 5 It is a structural schematic diagram of a loading mechanism in a valve body detection device for producing a threaded cartridge valve proposed by the present invention;

[0022] Figure 6 It is a structural schematic diagram of a magnetic powder collecting auxiliary mechanism in a valve body detection device for producing threaded cartridge valves proposed by the present invention;

[0023] Figure 7 This is a schematic diagram of the elevation structure of a conventional threaded cartridge valve.

[0024] In the figure: 3, magnetic particle inspection module; 31, mounting frame; 32, magnetic particle circulation mechanism; 33, propulsion mechanism; 34, loading mechanism; 35, baffle; 36, magnetic particle collection auxiliary mechanism; 321, channel; 322, notch; 323, air pump; 324, powder outlet; 325, blower; 330, slide seat; 341, bracket; 342, rack; 343, first rotating shaft; 344, first contact plate; 345, driven bevel gear; 346, second rotating shaft; 347, driving gear; 348, driving bevel gear; 349, electric push rod; 3410, second contact plate; 3411, bearing; 361, connecting frame; 362, steering gear; 363, scraper; 364, first sensor; 365, second sensor; A, powder attachment area; B, repair area. DETAILED DESCRIPTION

[0025] The subject matter described herein will now be discussed with reference to example implementations. It should be understood that the discussion of these implementations is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Various examples may omit, replace, or add various processes or components as needed, and in addition, the features described in some examples may also be combined in other examples.

[0026] like Figure 1 - Figure 7 As shown, a valve body inspection device for producing threaded cartridge valves performs flaw detection on the surface defects of the threaded cartridge valve body after magnetization treatment, including a magnetic particle flaw detection module 3;

[0027] The magnetic particle flaw detection module 3 comprises a mounting frame 31, a magnetic particle circulation mechanism 32, a propulsion mechanism 33, a loading mechanism 34, a baffle 35 and a magnetic particle collection auxiliary mechanism 36. A magnetic particle circulation mechanism 32 is fixedly arranged on one side of the mounting frame 31. The magnetic particle circulation mechanism 32 drives the magnetic particles to circulate in a U-shaped trajectory. A propulsion mechanism 33 is fixedly loaded on the bottom side of the magnetic particle circulation mechanism 32. A magnetic particle outlet is arranged on the top side of the magnetic particle circulation mechanism 32. A baffle 35 is arranged at the magnetic particle outlet to form a semi-enclosed space for the magnetic particle outlet. The propulsion mechanism 33 comprises a slide 330. Under the action of the propulsion mechanism 33, the slide 330 reciprocates along the bottom side of the magnetic particle circulation mechanism 32. The top of the slide 330 is fixedly connected to the loading mechanism 34. The magnetized threaded cartridge valve body is loaded on the loading mechanism 34 and moves and rotates with the slide 330. A magnetic particle collection auxiliary module is arranged at the bottom of the slide 330. The magnetic particle collection auxiliary module cooperates with the inside of the magnetic particle circulation mechanism 32.

[0028] The magnetic powder circulation mechanism 32 includes a channel 321, a slot 322, an air pump 323, a powder outlet 324 and a blower 325. The channel 321 is U-shaped. A powder outlet 324 vertically aligned with the loading mechanism 34 is provided on one side of the top of the channel 321. A slot 322 is symmetrically provided on one side of the bottom of the channel 321. An air pump 323 is installed on the channel 321. The air pump 323 generates negative pressure on the side of the slot 322 and generates positive pressure on the side of the powder outlet 324. A blower 325 is installed on the top of the channel 321 facing the powder outlet 324, and the air supply direction of the blower 325 is vertically downward.

[0029] It should be specially noted that: it is a common understanding in the technical field that the threaded cartridge valve body is magnetized before the surface defects of the valve body are detected by magnetic particle inspection. Specifically, the threaded cartridge valve body can be magnetized by electromagnetic induction through an energized coil.

[0030] When the magnetic particle flaw detection module 3 is used to detect the surface defects of the threaded cartridge valve body after magnetization, the threaded cartridge valve body to be detected is first clamped into the loading mechanism 34, and a certain amount of magnetic powder for surface flaw detection is filled into the channel 321 of the magnetic powder circulation mechanism 32 in advance, and then the air pump 323 and the blower 325 are turned on to make the magnetic powder flow in the channel 321. At the same time, the valve body is pushed to the side of the powder outlet 324 by the propulsion mechanism 33. During the pushing process, the valve body rotates while moving, so that its arc-shaped surface can be evenly covered by the magnetic powder. After passing through the range of the powder outlet 324, the magnetic powder circulation mechanism 32 is turned off to repair the defects on the valve body surface. After the repair is completed, the magnetic powder circulation mechanism 32 is turned on again to deliver powder, and at the same time, the valve body is moved back to the coverage range of the powder outlet 324 by the propulsion mechanism 33 to be covered by the magnetic powder again. This process is repeated until there is no defective position of the valve body surface where the magnetic powder is adhered.

[0031] Through continuous magnetic particle inspection and compound repair operations during the inspection process, the inspection and repair processes of the surface defects of the threaded cartridge valve body after magnetization are integrated.

[0032] In the above, a complete magnetic powder circulation process is that the magnetic powder is guided down from the powder outlet 324 and falls down under the drive of the blower 325 and the air pump 323, covers the surface of the valve body passing by, and provides a magnetic powder-covered environment for the valve body. Different from the traditional magnetic powder direct injection method, the valve body surface can be covered with magnetic powder without dead angles. Then, the magnetic powder not attached to the valve body diffuses to both sides along the edge of the valve body under its own gravity and continues to fall, and enters the channel 321 through the opposite slot 322. Under the negative pressure provided by the air pump 323, these magnetic powders are absorbed into the powder outlet 324, providing a role for subsequent detection, thereby realizing the circulation of magnetic powder.

[0033] It should be noted that there is a certain loss in the circulation process of the above-mentioned magnetic powder, and the magnetic powder needs to be replenished in the channel 321 in time. In the present invention, in addition to the means of replenishment, the semi-enclosed space formed by the baffle 35 limits the range of magnetic powder diffusion, effectively reducing the loss of magnetic powder.

[0034] The setting of the loading mechanism 34, in addition to providing a clamping function, can also effectively eliminate the adverse effect that the valve body of the threaded cartridge valve after magnetization is difficult to be completely covered when receiving magnetic powder (this adverse effect is reflected in the obstruction of the clamping part and the obstruction of the arc shape of the valve body itself). Specifically:

[0035] The loading mechanism 34 includes a bracket 341, a rack 342, a first rotating shaft 343, a first stop plate 344, a driven bevel gear, a second rotating shaft 346, a driving gear 347, a driving bevel gear 348, an electric push rod 349, a second stop plate 3410 and a bearing 3411. The bracket 341 is fixedly mounted on the slide 330, and a rack 342 is fixedly arranged in the mounting frame 31. A first rotating shaft 343 is rotatably arranged on one side of the bracket 341, and a first stop plate 344 is fixedly arranged at the end of the first rotating shaft 343. A driven bevel gear is fixedly sleeved on the first rotating shaft 343. 345, a second rotating shaft 346 is rotatably provided on the bracket 341, a driving gear 347 is fixedly sleeved on the second rotating shaft 346, the driving gear 347 is meshed with the rack 342, a driving bevel gear 348 is fixedly sleeved on the end of the second rotating shaft 346, the driving bevel gear 348 is meshed with the driven bevel gear, an electric push rod 349 is provided on the bracket 341, a second stop plate 3410 horizontally aligned with the first stop plate 344 is fixedly provided on the output end of the electric push rod 349, and the electric push rod 349 is connected to the bracket 341 through a bearing 3411.

[0036] In the loading mechanism 34, the valve body is first placed in the gap between the first butt plate 344 and the second butt plate 3410, and then the second butt plate 3410 is pushed toward the first butt plate 344 by the electric push rod 349 to clamp the valve body between the first butt plate 344 and the second butt plate 3410. During the clamping process, it is necessary to maintain coaxial clamping synchronously, that is, the first butt plate 344, the second butt plate 3410 and the central axis of the valve body are located on the same straight line. When the flaw detection is performed after the clamping is completed, as the slide 330 moves, the driving gear 347 is engaged with the rack 342, and the driving gear 347 immediately drives the second rotating shaft 346 to rotate. Since the driving bevel gear 348 is engaged with the driven bevel gear, the torque of the second rotating shaft 346 is transmitted to the first rotating shaft 343, thereby driving the first rotating shaft 343 to rotate, driving the valve body to rotate while moving.

[0037] It should be specially noted that the first abutment 344 and the second abutment 3410 are provided with certain treatments to increase surface friction, such as adding texture, so that the self-rotation does not affect the stability of clamping. On the side of the second abutment 3410, the rotating connection method provided by the bearing 3411 avoids the interference between the pushing action of the electric push rod 349 and the self-rotation.

[0038] Next, the movement of the slide 330 also promotes the collection of magnetic powder to a certain extent. Specifically, the magnetic powder collection auxiliary mechanism 36 includes a connecting frame 361, a steering gear 362, a scraper 363, a first sensor 364, and a second sensor 365. The bottom of the slide 330 is fixedly provided with a connecting frame 361, and the connecting frame 361 is arranged to penetrate the channel 321. The connecting frame 361 extends into the channel 321. One end is equipped with a steering gear 362. The output end of the steering gear 362 is equipped with a scraper 363. The scraper 363 is in compression contact with the inner wall of the channel 321. A first sensor 364 is installed on one side of the bottom of the channel 321, and a second sensor 365 is installed on the other side. The steering gear 362 cooperates with the first sensor 364 and the second sensor 365 to form different rotation states by approaching the first sensor 364 and the second sensor 365.

[0039] In the magnetic powder collecting auxiliary mechanism 36, when moving from the powder attachment area to the repair area, the scraper 363 keeps Figure 7 The magnetic powder collected in the channel 321 is scraped and concentrated to the corner of the channel 321 in the unfolded posture, so as to shorten the path of the negative pressure suction of the air pump 323 to promote the concentrated collection of the magnetic powder, which is called a process here, until it approaches the first sensor 364, the servo 362 will drive the scraper 363 to fold to a horizontal state, so that during the return process, the scraper 363 cancels the scraping effect on the inner wall of the channel 321 and will not push the magnetic powder in the reverse direction. At the end of the return journey, it approaches the second sensor 365, and the servo 362 drives the scraper 363 to rotate and return to a vertical state, providing a scraping and collecting effect for the next process.

[0040] The above describes an embodiment of the present invention, but this embodiment is not limited to the above specific implementation methods. The above specific implementation methods are merely illustrative and not restrictive. Under the guidance of this embodiment, ordinary technicians in this field can also make many forms, all of which are protected by this embodiment.

Claims

1. A valve body detection device for producing threaded cartridge valves, characterized in that: including a magnetic particle inspection module (3); The magnetic particle flaw detection module (3) comprises a mounting frame (31), a magnetic powder circulation mechanism (32), a propulsion mechanism (33), a loading mechanism (34), a baffle (35) and a magnetic powder collection auxiliary mechanism (36). A magnetic powder circulation mechanism (32) is fixedly arranged on one side of the mounting frame (31). The magnetic powder circulation mechanism (32) drives the magnetic powder to circulate along a U-shaped trajectory. The propulsion mechanism (33) is fixedly loaded on the bottom side of the magnetic powder circulation mechanism (32). A magnetic powder outlet is arranged on the top side of the magnetic powder circulation mechanism (32). A baffle (35) is provided, the propulsion mechanism (33) comprises a slide seat (330), under the action of the propulsion mechanism (33), the slide seat (330) slides back and forth along the bottom side of the magnetic powder circulation mechanism (32), the top of the slide seat (330) is fixedly connected to the loading mechanism (34), the magnetized threaded cartridge valve body is loaded on the loading mechanism (34), and moves and rotates with the slide seat (330), the bottom of the slide seat (330) is provided with a magnetic powder collection auxiliary module, and the magnetic powder collection auxiliary module cooperates with the inside of the magnetic powder circulation mechanism (32); The magnetic powder circulation mechanism (32) comprises a channel (321), a notch (322), an air pump (323), a powder outlet (324) and a blower (325); the channel (321) is U-shaped; a powder outlet (324) vertically aligned with the loading mechanism (34) is provided on one side of the top of the channel (321); a notch (322) is symmetrically provided on one side of the bottom of the channel (321); an air pump (323) is installed on the channel (321); the air pump (323) generates negative pressure on one side of the notch (322) and generates positive pressure on one side of the powder outlet (324); a blower (325) is installed on the top of the channel (321) facing the powder outlet (324); and the air supply direction of the blower (325) is vertically downward.

2. A valve body detection device for producing threaded cartridge valves according to claim 1, characterized in that: The baffle (35) forms a semi-enclosed space for the magnetic powder outlet.

3. A valve body detection device for producing threaded cartridge valves according to claim 1, characterized in that: The loading mechanism (34) comprises a bracket (341), a rack (342), a first rotating shaft (343), a first contact plate (344), a driven bevel gear, a second rotating shaft (346), a driving gear (347), a driving bevel gear (348), an electric push rod (349), a second contact plate (3410) and a bearing (3411); the bracket (341) is fixedly mounted on the slide seat (330); the rack (342) is fixedly arranged in the mounting frame (31); a first rotating shaft (343) is rotatably arranged on one side of the bracket (341); a first contact plate (344) is fixedly arranged at the end of the first rotating shaft (343); a driven bevel gear (347) is fixedly sleeved on the first rotating shaft (343); gear (345), a second rotating shaft (346) is rotatably provided on the bracket (341), a driving gear (347) is fixedly sleeved on the second rotating shaft (346), the driving gear (347) is meshed with the rack (342), a driving bevel gear (348) is fixedly sleeved on the end of the second rotating shaft (346), the driving bevel gear (348) is meshed with the driven bevel gear, an electric push rod (349) is provided on the bracket (341), a second stop disc (3410) horizontally aligned with the first stop disc (344) is fixedly provided on the output end of the electric push rod (349), and the electric push rod (349) is connected to the bracket (341) via a bearing (3411).

4. A valve body detection device for producing threaded cartridge valves according to claim 3, characterized in that: The surfaces of the first abutment disc (344) and the second abutment disc (3410) are provided with textures.

5. A valve body detection device for producing threaded cartridge valves according to claim 1, characterized in that: The magnetic powder collection auxiliary mechanism (36) comprises a connecting frame (361), a steering gear (362), a scraper (363), a first sensor (364), and a second sensor (365). The bottom of the slide seat (330) is fixedly provided with a connecting frame (361), the connecting frame (361) is arranged to penetrate the channel (321), the end of the connecting frame (361) extending into the channel (321) is provided with a steering gear (362), the output end of the steering gear (362) is provided with a scraper (363), the scraper (363) is in compression contact with the inner wall of the channel (321), the bottom of the channel (321) is provided with a first sensor (364) on one side, and a second sensor (365) on the other side, the steering gear (362) cooperates with the first sensor (364) and the second sensor (365), and forms different rotation states by approaching the first sensor (364) and the second sensor (365).

Images