Closed salt spray test device

Abstract

The utility model discloses a closed salt spray test device, which relates to the technical field of salt spray tests and comprises a test box and a flow guide component. A first pressure sensor is installed in the test box, a placement net is fixed to the lower end in the test box, a support is fixed to the lower side of the test box, shifting assemblies are installed at the right ends of the upper side and the lower side in the test box, and a sealing assembly is installed on the front side of the test box; the first pressure sensor is bidirectionally and electrically connected with an external PLC (Programmable Logic Controller); the flow guide assembly comprises a fixed box, a conical fog inlet box, a rotating shaft, a baffle plate, a gear and a rack, two corresponding openings are formed in the upper side and the lower side of the test box, the fixed box is fixed in the openings, the conical fog inlet box is fixed on the side face of the fixed box and is communicated with an inner cavity of the fixed box, and the rotating shaft is arranged in the conical fog inlet box. The salt mist can be uniformly sprayed on the surface of a test material, and meanwhile, the salt mist can be prevented from escaping during a test.

Description

TECHNICAL FIELD

[0001] The utility model relates to salt mist test technical field, concretely is a kind of closed salt mist test device. BACKGROUND

[0002] Salt mist test device is the key equipment of evaluating material corrosion resistance, is widely used in industrial product quality inspection.The obvious defect of traditional salt mist test equipment is exposed in long-term use: one, the design defect of salt mist spraying system leads to uneven distribution of atomized particles in box, directly affect the accuracy and repeatability of test result;Second, the reliability of equipment sealing structure is insufficient, salt mist is easy to escape in test process, not only pollute laboratory environment, but also may be due to external air exchange interference internal temperature and humidity stability, urgently needs improvement, for this, we propose a kind of closed salt mist test device. UTILITY MODEL CONTENT

[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art, provide a closed salt mist test device, which can uniformly spray salt mist on the surface of test materials, and can avoid salt mist escaping during testing, thereby effectively solving the problems in the background art.

[0004] To achieve the above object, the utility model provides the following technical scheme: a closed salt mist test device, comprising a test box and a flow guide assembly.

[0005] Test box: a first pressure sensor is installed inside, a placing net is fixed to the lower end inside the test box, a support is fixed to the lower side of the test box, a toggle assembly is installed to the right end of the upper and lower sides inside the test box, a sealing assembly is installed to the front side of the test box, and the first pressure sensor is bidirectionally electrically connected with an external PLC controller.

[0006] Flow guide assembly: it comprises a fixed box, a conical mist inlet box, a shaft, a baffle, a gear and a rack, two corresponding openings are formed on the upper and lower sides of the test box, the fixed box is fixed inside the opening, the conical mist inlet box is fixed to the side surface of the fixed box, the conical mist inlet box is communicated with the inner cavity of the fixed box, the shaft is rotatably connected to the inside of the uniformly distributed rotating hole of the right side of the fixed box, the baffle is fixed to the lower end of the circumferential surface of the shaft, the gear is fixed to the right end of the shaft, the rack is arranged to the right side of the fixed box, two racks are respectively engaged with all the gears above and below, and the two racks are connected with the toggle assembly, and the flow guide assembly is arranged to guide the salt mist.

[0007] Further, the dialing assembly comprises a fixed frame, a second pressure sensor, a motor, a moving strip and a threaded rod, two corresponding fixed frames are fixed to the right end of the upper and lower sides in the test box, the moving strip is slidably connected in the fixed frame, the rack is fixed on the side surface of the moving strip adjacent to the rack, a threaded hole is formed in the middle of the moving strip, the threaded rod is threadedly connected in the threaded hole, the threaded rod is threadedly connected in the fixed frame, the motor is installed on the rear side of the fixed frame, the output shaft of the motor is fixed on the rear end of the threaded rod, two corresponding grooves are formed on the front and rear sides in the fixed frame, the second pressure sensor is installed in the groove, the second pressure sensor is bidirectionally electrically connected with the external PLC controller, the input end of the motor is electrically connected with the output end of the external PLC controller, and all the baffles are driven to swing forward and backward through the dialing assembly.

[0008] Further, the sealing assembly comprises a fixed frame, a first rubber sealing frame, a second rubber sealing frame, a baffle and a connecting lock, the fixed frame is fixed to the front side in the test box, the first rubber sealing frame is fixed to the front side of the fixed frame, the second rubber sealing frame is sleeved with the side surface of the first rubber sealing frame, the baffle is fixed to the front side of the second rubber sealing frame, the baffle is hinged to the front side of the test box, the connecting lock is installed on the lower end of the front side of the baffle, and the rear end of the connecting lock is connected with the front side of the test box.

[0009] Further, the exhaust pipe is fixed in the exhaust port arranged on the left side of the test box, and the pressure relief valve is installed on the left end of the exhaust pipe.

[0010] Further, the front side of the baffle is provided with an observation port, and the transparent plate is fixed in the observation port.

[0011] Further, the two conical mist boxes are connected through the three-way pipe, the connecting flange ring is fixed to the surface of the port away from the two conical mist boxes, and the salt mist for test is introduced into the two conical mist boxes through the three-way pipe.

[0012] Compared with the prior art, the closed salt mist test device has the following advantages:

[0013] 1. The adjustable angle baffle array design in the flow guide assembly is matched with the diffusion structure of the conical mist box, so that the salt mist forms multi-stage turbulent flow in the test box, effectively eliminates the blind area of the spray mist, and ensures that the surface of the measured material can obtain uniform coverage of the salt mist deposition.

[0014] 2. By combining the nested first rubber sealing frame and the second rubber sealing frame with the connecting lock, a three-level sealing interface is formed when the baffle is closed, which can effectively prevent salt mist leakage and maintain a micro-positive pressure environment inside the box, ensuring the stability of the test conditions.

[0015] 3. The exhaust pipe design integrated with the pressure relief valve can automatically adjust the pressure in the box to a safe range, and the high-strength transparent observation window can realize visual monitoring of the test process while ensuring operation safety, facilitating real-time monitoring of the test state. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a front side structure schematic diagram of the utility model;

[0017] Figure 2 It is a flow guide assembly structure schematic diagram of the utility model;

[0018] Figure 3 It is a toggle assembly structure schematic diagram of the utility model;

[0019] Figure 4 It is a left side sectional view of the utility model.

[0020] In the figure: 1 test box, 2 first pressure sensor, 3 placing net, 4 flow guide assembly, 41 fixed box, 42 conical mist inlet box, 43 rotating shaft, 44 baffle, 45 gear, 46 rack, 5 toggle assembly, 51 fixed frame, 52 second pressure sensor, 53 motor, 54 moving strip, 55 threaded rod, 6 sealing assembly, 61 fixed frame, 62 first rubber sealing frame, 63 second rubber sealing frame, 64 baffle, 65 connecting lock, 7 exhaust pipe, 8 pressure relief valve, 9 transparent plate, 10 support, 11 three-way pipe, 12 connecting flange ring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be described clearly and completely below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-4 The embodiment provides a technical solution: a closed salt mist test device, which comprises a test box 1 and a flow guide assembly 4.

[0023] The test box 1 is internally provided with the first pressure sensor 2, the lower end of the test box 1 is fixedly provided with the placing net 3, the lower side of the test box 1 is fixedly provided with the support 10, the right end of the upper and lower sides of the test box 1 is provided with the dialing assembly 5, the front side of the test box 1 is provided with the sealing assembly 6, the first pressure sensor 2 is bidirectionally electrically connected with the external PLC controller, the dialing assembly 5 comprises the fixed frame 51, the second pressure sensor 52, the motor 53, the moving strip 54 and the threaded rod 55, the right end of the upper and lower sides of the test box 1 is fixedly provided with two corresponding fixed frames 51, the moving strip 54 is slidably connected in the fixed frame 51, the rack 46 is fixed on the side surface of the moving strip 54 adjacent thereto, the middle part of the moving strip 54 is provided with the threaded hole, the threaded hole is threadedly connected with the threaded rod 55, the threaded rod 55 is threadedly connected in the fixed frame 51, the rear side of the fixed frame 51 is provided with the motor 53, the output shaft of the motor 53 is fixed on the rear end of the threaded rod 55, the front and rear sides of the fixed frame 51 are provided with two corresponding grooves, the second pressure sensor 52 is mounted in the groove, the second pressure sensor 52 is bidirectionally electrically connected with the external PLC controller, the input end of the motor 53 is electrically connected with the output end of the external PLC controller, the sealing assembly 6 comprises the fixed frame 61, the first rubber sealing frame 62, the second rubber sealing frame 63, the baffle 64 and the connecting lock 65, the front side of the test box 1 is fixedly provided with the fixed frame 61, the front side of the fixed frame 61 is fixedly provided with the first rubber sealing frame 62, the side surface of the first rubber sealing frame 62 is sleeved with the second rubber sealing frame 63, the front side of the second rubber sealing frame 63 is fixedly provided with the baffle 64, the baffle 64 is hingedly connected on the front side of the test box 1, the lower end of the front side of the baffle 64 is provided with the connecting lock 65, the rear end of the connecting lock 65 is connected with the front side of the test box 1, the test box 1 is sealed by the sealing assembly 6, all the baffles 44 are swung forward and backward by the dialing assembly 5;

[0024] The flow guide assembly 4 comprises the fixed box 41, the conical mist inlet box 42, the rotating shaft 43, the baffle 44, the gear 45 and the rack 46, two corresponding openings are formed on the upper and lower sides of the test box 1, the fixed box 41 is fixed in the opening, the conical mist inlet box 42 is fixed on the side surface of the fixed box 41, the conical mist inlet box 42 communicates with the inner cavity of the fixed box 41, the rotating holes are uniformly formed on the right side of the fixed box 41, the rotating shaft 43 is rotatably connected in the rotating hole, the baffle 44 is fixed on the lower end of the circumferential surface of the rotating shaft 43, the gear 45 is fixed on the right side of the fixed box 41, the two racks 46 are respectively engaged with all the gears 45 on the upper and lower sides, the two racks 46 are connected with the dialing assembly 5, the salt mist is guided by the flow guide assembly 4.

[0025] The exhaust pipe 7 is fixed in the exhaust port on the left side of the test box 1, the pressure relief valve 8 is mounted on the left end of the exhaust pipe 7, the pressure is relieved by the pressure relief valve 8.

[0026] Wherein: the front side of the baffle 64 is provided with an observation port, the inside of the observation port is fixed with a transparent plate 9, and the transparent plate 9 is arranged to facilitate the user to observe the test pressure effect.

[0027] Wherein: the two conical mist boxes 42 are connected through the tee pipe 11, the surface of the port away from the two conical mist boxes 42 of the tee pipe 11 is fixed with a connecting flange ring 12, and the salt mist for test is input into the inside of the two conical mist boxes 42 through the tee pipe 11.

[0028] The working principle of the closed salt mist test device is as follows: the salt mist is input into the two conical mist boxes 42 through the connecting flange ring 12 and the tee pipe 11, and then forms uniform diffusion in the flow guide assembly 4, the screw rod 55 and the threaded hole of the moving strip 54 are matched to convert the rotary motion into the back and forth reciprocating linear motion of the moving strip 54 along the fixed frame 51, the moving strip 54 drives the rack 46 to displace synchronously, the rack 46 and the gear 45 are meshed and driven to drive all the rotating shafts 43 to rotate synchronously, and the baffle 44 is driven to form a dynamic flow guide surface. The salt mist is uniformly covered on the test sample on the placing net 3 after being reflected by the baffle 44 at multiple angles. During the test process, the first pressure sensor 2 monitors the pressure in the test box 1 in real time, when the pressure exceeds the threshold value, the pressure relief valve 8 automatically adjusts the pressure balance through the exhaust pipe 7. The sealing assembly 6 realizes three-stage sealing through the nesting compression of the first rubber sealing frame 62 and the second rubber sealing frame 63, and the mechanical locking of the connecting lock 65 ensures the airtightness of the test box 1. The operator can observe the test process in real time through the transparent plate 9, the PLC controller controls the reciprocating motion frequency of the motor 53 according to the feedback signal of the second pressure sensor 52, and realizes the closed-loop adjustment of the swing amplitude of the baffle 44.

[0029] It is worth noting that the external PLC controller disclosed in the above embodiment is specifically a Siemens S7-200, and the first pressure sensor 2, the second pressure sensor 52 and the motor 53 can be freely configured according to the actual application scene, and the external PLC controller controls the working of the motor 53 by using the method commonly used in the prior art.

[0030] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structure or equivalent process conversion made by using the contents of the utility model specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection range of the utility model.

Claims

1. A closed-type salt spray test device characterized by comprising: The utility model relates to a test box and a flow guide assembly (4) are included. The utility model discloses a test box (1) is installed with first pressure sensor (2) in, the lower end fixed place net (3) in the inside of test box (1), the lower side of test box (1) is fixed with support (10), the right end of inside upper and lower sides of test box (1) is installed with toggle assembly (5), the front side of test box (1) is installed with sealing assembly (6), and first pressure sensor (2) is connected with the two -way electricity of external PLC controller, The utility model discloses a test box (1) is installed with first pressure sensor (2) in, the lower end fixed place net (3) in the inside of test box (1), the lower side of test box (1) is fixed with support (10), the right end of inside upper and lower sides of test box (1) is installed with toggle assembly (5), the front side of test box (1) is installed with sealing assembly (6), and first pressure sensor (2) is connected with the two -way electricity of external PLC controller, 2. The closed-type salt spray tester according to claim 1, characterized by: The utility model discloses a test box (1) is installed with first pressure sensor (2) in, the lower end fixed place net (3) in the inside of test box (1), the lower side of test box (1) is fixed with support (10), the right end of inside upper and lower sides of test box (1) is installed with toggle assembly (5), the front side of test box (1) is installed with sealing assembly (6), and first pressure sensor (2) is connected with the two -way electricity of external PLC controller, The utility model discloses a test box (1) is installed with first pressure sensor (2) in, the lower end fixed place net (3) in the inside of test box (1), the lower side of test box (1) is fixed with support (10), the right end of inside upper and lower sides of test box (1) is installed with toggle assembly (5), the front side of test box (1) is installed with sealing assembly (6), and first pressure sensor (2) is connected with the two -way electricity of external PLC controller, 3. The closed-type salt spray tester according to claim 1, wherein: The sealing assembly (6) comprises a fixed frame (61), a first rubber sealing frame (62), a second rubber sealing frame (63), a baffle (64) and a connecting lock (65), the front side of the inside of the test box (1) is fixed with the fixed frame (61), the front side of the fixed frame (61) is fixed with the first rubber sealing frame (62), the side of the first rubber sealing frame (62) is sleeved with the second rubber sealing frame (63), the front side of the second rubber sealing frame (63) is fixed with the baffle (64), the baffle (64) is hinged on the front side of the test box (1), the lower end of the front side of the baffle (64) is provided with the connecting lock (65), and the rear end of the connecting lock (65) is connected with the front side of the test box (1).

4. The closed-type salt spray testing device according to claim 1, characterized in that: The inside of the exhaust port arranged on the left side of the test box (1) is fixed with an exhaust pipe (7), and the left end of the exhaust pipe (7) is provided with a pressure relief valve (8).

5. The closed-type salt spray testing device according to claim 3, characterized in that: The front side of the baffle (64) is provided with an observation port, and the inside of the observation port is fixed with a transparent plate (9).

6. The closed-type salt spray tester according to claim 1, wherein: Two conical mist entering boxes (42) are connected through a three-way pipe (11), and the surface of the port away from the two conical mist entering boxes (42) is fixed with a connecting flange ring (12).

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