Lifting type nitrogen injection device

Abstract

The utility model relates to a lifting type nitrogen injection device which comprises a base, a vertical first sliding rod is fixedly connected to the base, a sliding seat is connected to the first sliding rod in a sliding mode, a first driving mechanism for driving the sliding seat to slide up and down is arranged on the base, and a shell is fixedly connected to the front end of the sliding seat. A vertical nitrogen injection pipe is fixedly connected to the bottom of the shell, a conveying pipe communicated with the nitrogen injection pipe is fixed in the shell, the end, away from the nitrogen injection pipe, of the conveying pipe is connected with a nitrogen source, the nitrogen injection pipe is sleeved with a sealing cover, and a second driving mechanism for driving the sealing cover to move up and down is arranged on the shell. The nitrogen injection pipe is driven by the first driving mechanism to be inserted into the nitriding furnace to inject nitrogen, and the sealing cover is driven by the second driving mechanism to seal the nitriding furnace, so that the labor amount is reduced, the operation is convenient, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of casting, in particular to a lifting type nitrogen injection device. Background Art

[0002] In the casting process, some castings need nitriding treatment to ensure strength. Nitriding treatment refers to a chemical heat treatment process that allows nitrogen atoms to penetrate into the surface of the workpiece in a certain medium at a certain temperature. Usually, the temperature is kept in the range of 500℃~600℃ during nitriding. It varies from 3 to 90 hours depending on the material of the workpiece and the requirements of the infiltration layer, so that the surface of the nitrided workpiece obtains a nitrogen-containing strengthening layer. The nitrided products have excellent wear resistance, fatigue resistance, corrosion resistance and high temperature resistance. Nitriding furnace is a device for nitriding treatment, which has the characteristics of low treatment temperature, short time, small deformation of the workpiece, high fatigue limit and good wear resistance.

[0003] When using a nitriding furnace, personnel first use a nitrogen injector to fill the furnace with nitrogen to expel the air inside, so as to prevent defects in the workpiece due to mixed air impurities during high-temperature reaction. After nitrogen is filled for a certain period of time, the workpiece is placed in the furnace, and then the personnel lock and fix the furnace cover to heat the workpiece for nitriding. When using existing nitriding furnaces, there are many manual operations and low efficiency. Therefore, a mechanical lifting nitrogen injection device is designed to improve work efficiency and reduce labor intensity. Summary of the invention

[0004] The utility model aims at the deficiencies of the prior art and provides a mechanical lifting type nitrogen injection device, which reduces the workload of workers and improves the operation efficiency.

[0005] The utility model is realized through the following technical scheme: a lifting nitrogen injection device, comprising a base, a vertical first sliding rod fixedly connected to the base, a sliding seat slidably connected to the first sliding rod, a first driving mechanism for driving the sliding seat to slide up and down is provided on the base, a shell is fixedly connected to the front end of the sliding seat, a vertical nitrogen injection pipe is provided at the bottom of the shell, a delivery pipe connected to the nitrogen injection pipe is fixed in the shell, one end of the delivery pipe away from the nitrogen injection pipe is connected to a nitrogen source, a sealing cover is sleeved on the nitrogen injection pipe, and a second driving mechanism for driving the sealing cover to move up and down is provided on the shell.

[0006] In this solution, the first driving mechanism drives the sliding seat to slide downward, so that the nitrogen injection tube is inserted into the nitriding furnace to inject nitrogen, and the second driving mechanism drives the sealing cover to move downward to seal the nitriding furnace opening. The nitrogen output by the nitrogen source is transported to the nitrogen injection tube through the delivery pipe and injected into the nitriding furnace.

[0007] As an optimization, the first driving mechanism includes two sprockets rotatably mounted at the rear end of the first slide bar and a first motor driving one of the sprockets to rotate, the two sprockets are distributed up and down and meshed with a chain, and the sliding seat is fixedly connected to the chain. This optimization scheme is composed of two sprockets and a chain to form a lifting mechanism, and the first motor drives the chain to drive the sliding seat to slide up and down by forward and reverse rotation.

[0008] As an optimization, the second driving mechanism includes a second motor and a vertical rack plate, a box body is fixedly connected to the housing, the rack plate is connected to the box body for vertical sliding, a driving gear meshing with the rack plate rack is fixedly connected to the output end of the second motor, and the rack plate is fixedly connected to the cover. In this optimization solution, the second motor drives the driving gear to rotate, driving the meshing rack plate to slide up and down, thereby driving the cover to move up and down.

[0009] As an optimization, a second vertical sliding rod is fixedly connected to the base at the rear side of the first sliding rod, and a reinforcing plate is fixedly connected to the sliding seat and is slidably connected to the second sliding rod. The reinforcing plate of this optimization solution provides a backward pulling force for the sliding seat, thereby enhancing the stability of the sliding seat.

[0010] As an optimization, a fixed limit ring is sleeved on the pipe opening at the bottom of the nitrogen injection pipe. This optimization solution limits the nitrogen injection pipe by the limit ring to prevent the nitrogen injection pipe from detaching from the cover, and at the same time strengthens the protection of the pipe opening.

[0011] As an optimization, a positioning fork is provided at the front end of the base, and the positioning fork includes a threaded rod and a protective plate fixedly connected to the front end arc of the threaded rod. This optimization solution positions the nitriding furnace top on the protective plate, making it easy to align the nitrogen injection pipe and insert it into the nitriding furnace port.

[0012] As an optimization, a mobile frame is fixedly connected to the bottom of the base. This optimization solution facilitates the mobile use of the device.

[0013] The beneficial effects of the utility model are as follows: the nitrogen injection tube is inserted into the nitriding furnace to inject nitrogen through the first driving mechanism, and the sealing cover is driven by the second driving mechanism to seal the nitriding furnace, thereby reducing the amount of manual labor. When the nitrogen injection tube is inserted, it is not necessary to manually adjust and align it with the nitriding furnace opening. The positioning is completed by placing the guard plate of the device on the nitriding furnace, which is convenient to operate and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the front view of the utility model;

[0015] Figure 2 It is a top view of the utility model;

[0016] Figure 3 It is a front view of the first driving mechanism structure;

[0017] Figure 4 is a side view of the first driving mechanism structure;

[0018] Figure 5 is a schematic structural diagram of a second driving mechanism;

[0019] Figure 6 It is a front view of the delivery pipe in the shell;

[0020] Figure 7 It is a top view of the delivery pipe in the shell;

[0021] As shown in the figure:

[0022] 1. Base, 2. First slide bar, 3. Sliding seat, 4. Shell, 5. Nitrogen injection tube, 6. Cover, 7. First motor, 8. Sprocket, 9. Second slide bar, 10. Reinforcement plate, 11. Bevel gear, 12. Second motor, 13. Box, 14. Rack plate, 15. Drive gear, 16. Limiting ring, 17. Threaded rod, 18. Guard plate, 19. Mobile frame, 20. Control box, 21. Delivery pipe, 22. Nitriding furnace, 23. Support frame, 24. Connecting plate, 25. Chain. DETAILED DESCRIPTION

[0023] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0024] like Figures 1 to 7 As shown, a lifting nitrogen injection device, such as Figure 1 As shown, it includes a base 1, on which a vertical first slide bar 2 and a second slide bar 9 are fixedly connected, the second slide bar 9 is located behind the first slide bar 2 and is parallel to and opposite to the first slide bar 2, the first slide bar 2 is slidably connected to a sliding seat 3, and the rear end of the sliding seat 3 is fixedly connected to a reinforcing plate 10 that is slidably connected to the second slide bar 9, and the reinforcing plate 10 provides a backward pulling force for the sliding seat 3 to enhance the stability of the sliding seat 3.

[0025] In this embodiment, two connecting frames distributed vertically are fixedly connected between the first sliding rod 2 and the second sliding rod 9 to enhance the structural strength. The connecting frame is composed of two connecting plates 24 that are parallel and opposite to each other in the transverse direction.

[0026] The base 1 is provided with a first driving mechanism for driving the sliding seat 3 to slide up and down. The first driving mechanism includes two sprocket wheels 8 rotatably mounted on the rear end of the first slide bar 2 and a first motor 7 driving one of the sprocket wheels 8 to rotate. The two sprocket wheels 8 are distributed up and down and meshed with a chain 25, and the sliding seat 3 is fixedly connected to the chain 25.

[0027] Specifically, Figure 3 , 4As shown, the two connecting frames distributed up and down between the first slide bar 2 and the second slide bar 9 are both rotatably mounted with rotating shafts, and the two sprocket wheels 8 are respectively fixedly connected to the rotating shafts of the two connecting frames. The sprocket wheel 8 of this embodiment is a double-sprocket sprocket, and two chains 25 are meshed and connected between the two sprocket wheels to enhance the bearing capacity. The rear end of the sliding seat 3 is fixedly connected with a fixed lock buckle that is locked and fixed with the two chains 25.

[0028] The first motor 7 of this embodiment is vertically mounted on the base 1 through a support frame 23. The output end of the first motor 7 passes through the support frame 23 and is fixedly connected to a bevel gear 11. A horizontal transmission shaft is connected to the support frame. The transmission shaft is vertically arranged to the rotating shaft on the lower connecting frame. The rotating shaft is also fixedly connected to a bevel gear 11. Two bevel gears 11 are also fixedly connected to the transmission shaft and are respectively meshed with the bevel gear on the first motor and the bevel gear on the rotating shaft.

[0029] like Figure 6 , 7 As shown, the front end of the sliding seat 3 is fixedly connected to a housing 4, the bottom of the housing 4 is fixedly connected to a vertical nitrogen injection pipe 5, a delivery pipe 21 connected to the nitrogen injection pipe 5 is fixed inside the housing 4, and the end of the delivery pipe away from the nitrogen injection pipe is connected to a nitrogen source. In this embodiment, a limit ring 16 is fixedly mounted on the pipe opening at the bottom of the nitrogen injection pipe 5. The nitrogen injection pipe and the delivery pipe in this embodiment are stainless steel pipes with high strength and high temperature resistance.

[0030] like Figure 5 As shown, the nitrogen injection pipe 5 is sleeved with a cover 6, and the housing 4 is provided with a second driving mechanism for driving the cover 5 to move up and down. The second driving mechanism includes a second motor 12 and a vertical rack plate 14, a box body 13 is fixedly connected to the housing 4, the rack plate 14 is slidably connected to the box body 13 up and down, a driving gear 15 meshing with the rack of the rack plate is fixedly connected to the output end of the second motor 12, and the bottom of the rack plate 14 is fixedly connected to the cover 6.

[0031] In this embodiment, the rack plate 14 is slidably connected to the box body 13 through a slide groove and a slider. The second motor 12 is fixed to the outer wall of the box body 13, and the output end of the second motor is fixed to the driving gear of the rack plate that meshes with the rack in the box body, thereby driving the cover fixed to the bottom of the rack plate to slide up and down.

[0032] In order to facilitate the mobile use of the device, a mobile frame 19 is fixedly connected to the bottom of the base 1. A positioning fork is provided at the front end of the base 1, and the positioning fork includes a threaded rod 17 and an arc-shaped guard plate 18 fixed to the front end of the threaded rod. The threaded rod 17 of this embodiment is screwed to the front side wall of the mobile frame 19, and a nut is screwed on the threaded rod. It is convenient to adjust the length of the positioning fork, and the positioning is completed by pressing the nitriding furnace 22 against the guard plate 18, so that the nitrogen injection pipe 5 is aligned and inserted into the nitriding furnace port.

[0033] A control box 20 is fixedly connected to the rear side of the base 1 , and a control switch for controlling the forward and reverse rotation of the first motor and the second motor is provided on the control box.

[0034] Working principle: the device moves to the nitriding furnace 22, and the guard plate 18 of the positioning fork is pressed against the outer wall of the nitriding furnace 22 to locate the furnace hole. The sliding seat 3 is driven to slide downward by the first motor 7 to insert the nitrogen injection pipe 5 into the furnace hole, and the delivery pipe 21 is connected to the nitrogen source. Nitrogen is injected into the nitriding furnace 22 through the nitrogen injection pipe 5 to exhaust the air. After a certain period of nitrogen injection, the nitrogen injection pipe 5 is moved upward and the workpiece is placed. The rack plate 14 is driven to slide downward by the second motor 12 to cover the nitriding furnace mouth, and the workpiece can be heated for nitriding treatment, which reduces the labor of personnel and improves the working efficiency.

[0035] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A lifting nitrogen injection device, comprising a base (1), characterized in that: A vertical first slide bar (2) is fixedly connected to the base (1), a slide seat (3) is slidably connected to the first slide bar (2), a first driving mechanism for driving the slide seat (3) to slide up and down is provided on the base (1), a shell (4) is fixedly connected to the front end of the slide seat (3), a vertical nitrogen injection pipe (5) is provided at the bottom of the shell (4), a delivery pipe (21) connected to the nitrogen injection pipe is fixed in the shell (4), one end of the delivery pipe away from the nitrogen injection pipe is connected to a nitrogen source, a sealing cover (6) is sleeved on the nitrogen injection pipe (5), and a second driving mechanism for driving the sealing cover (6) to move up and down is provided on the shell (4).

2. A lifting type nitrogen injection device according to claim 1, characterized in that: The first driving mechanism comprises two sprocket wheels (8) rotatably mounted on the rear end of the first sliding rod (2) and a first motor (7) driving one of the sprocket wheels (8) to rotate, the two sprocket wheels (8) being distributed up and down and meshed with a chain (25), and the sliding seat (3) being fixedly connected to the chain (25).

3. A lifting type nitrogen injection device according to claim 1, characterized in that: The second driving mechanism comprises a second motor (12) and a vertical rack plate (14); a box body (13) is fixedly connected to the housing (4); the rack plate (14) is slidably connected to the box body (13) in an up-and-down manner; a driving gear (15) meshing with a rack of the rack plate (14) is fixedly connected to the output end of the second motor (12); and the rack plate (14) is fixedly connected to the cover (6).

4. The lifting type nitrogen injection device according to claim 1, characterized in that: A vertical second sliding rod (9) is fixedly connected to the base (1) at the rear side of the first sliding rod (2), and a reinforcing plate (10) is fixedly connected to the sliding seat (3) in a slidable manner with the second sliding rod (9).

5. The lifting type nitrogen injection device according to claim 1, characterized in that: A limit ring (16) is fixedly mounted on the pipe opening at the bottom of the nitrogen injection pipe (5).

6. The lifting type nitrogen injection device according to claim 1, characterized in that: A positioning fork is provided at the front end of the base (1), and the positioning fork comprises a threaded rod (17) and an arc-shaped guard plate (18) fixedly connected to the front end of the threaded rod.

7. The lifting type nitrogen injection device according to claim 1, characterized in that: A movable frame (19) is fixedly connected to the bottom of the base (1).

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