A split nozzle structure of a plasma torch

Abstract

The utility model discloses a kind of split type nozzle structure of plasma torch, is set to the head inside of plasma torch, including nozzle main part and split type nozzle, the axial through of nozzle main part is provided with the mounting hole of cylindrical structure, the inner wall of the mounting hole of nozzle main part is set to ladder structure, including by outer and inner sequentially arranged first step surface, second step surface and third step surface, the split type nozzle is correspondingly set in the mounting hole of nozzle main part, the axial through of split type nozzle is provided with jet port, the outer wall of split type nozzle and first step surface correspond sealing, and second step surface correspond to form cooling cavity, and third step surface correspond thread connection fixed, the nozzle main part is provided with cooling water inlet in the front of cooling cavity, and cooling water outlet is provided in the rear of cooling cavity.The utility model is simple in structure, reasonable, reliable, can be conveniently disassembled and replaced, just replace damaged part, greatly reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to a split nozzle structure for a plasma spray gun. Background Technology

[0002] A plasma spray gun is a key device that uses a plasma arc as a heat source. It is mainly used for material surface spraying processes, where the sprayed material is melted at high temperature and a functional coating is formed on the substrate surface.

[0003] The nozzles of existing plasma spray guns are usually one-piece structures. During the use of plasma spray guns, the inner cavity of the nozzle will be worn. Traditional nozzles are replaced as a whole, which is costly.

[0004] To address this, a split nozzle structure for a plasma spray gun was developed, which can significantly reduce usage costs. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide a split nozzle structure for a plasma spray gun. The structure is simple, reasonable and reliable, and can be easily disassembled and replaced. Only the damaged parts need to be replaced, which greatly reduces maintenance costs.

[0006] To solve the above-mentioned technical problems, the present invention provides a split nozzle structure for a plasma spray gun, which is disposed inside the head of the plasma spray gun. The structure includes a nozzle body and a split nozzle. The nozzle body has an axially penetrating cylindrical mounting hole. The inner wall of the mounting hole of the nozzle body has a stepped structure, including a first step surface, a second step surface, and a third step surface arranged sequentially from the outside to the inside. The split nozzle is correspondingly disposed within the mounting hole of the nozzle body. The split nozzle has an axially penetrating jet outlet. The outer wall of the split nozzle is sealed to the first step surface, forms a cooling chamber to the second step surface, and is threadedly connected and fixed to the third step surface. The nozzle body has a cooling water inlet at the front of the cooling chamber and a cooling water outlet at the rear of the cooling chamber.

[0007] In a preferred embodiment of the present invention, the diameters of the first step surface, the second step surface, and the third step surface increase sequentially.

[0008] In a preferred embodiment of the present invention, the first stepped surface is provided with annularly distributed grooves and correspondingly provided with sealing rings.

[0009] In a preferred embodiment of the present invention, the nozzle body and the split nozzle are correspondingly limited at the front end of the threaded connection by a stepped structure.

[0010] In a preferred embodiment of this utility model, the cooling water inlet and cooling water outlet are provided in multiple equally spaced rings.

[0011] In a preferred embodiment of this utility model, the cooling water inlet holes are distributed perpendicular to the split nozzles.

[0012] In a preferred embodiment of this utility model, the cooling water outlet holes are distributed in a backward-sloping manner from the inside out.

[0013] The beneficial effects of this utility model are: the split nozzle structure of the plasma spray gun pointed out by this utility model is simple, reasonable and reliable, and can be easily disassembled and replaced. Only the damaged parts need to be replaced, which greatly reduces the maintenance cost. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0015] Figure 1 This is a perspective view of a preferred embodiment of the split nozzle structure of a plasma spray gun according to the present invention;

[0016] Figure 2 yes Figure 1 Axonometric sectional view;

[0017] Figure 3 This is a preferred embodiment of the split nozzle structure of a plasma spray gun according to the present invention, which is an installation axial sectional view. Detailed Implementation

[0018] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Please see Figures 1-3 As shown, the embodiments of this utility model include:

[0020] A split nozzle structure for a plasma spray gun is provided on the inner side of the head of the plasma spray gun 1, including a nozzle body 2 and a split nozzle 3.

[0021] The nozzle body 2 has a cylindrical mounting hole 4 through which it is axially inserted for mounting the split nozzle 3.

[0022] The inner wall of the mounting hole 4 of the nozzle body 2 is arranged in a stepped structure, including a first step surface 5, a second step surface 6 and a third step surface 7 arranged sequentially from the outside to the inside. The diameters of the first step surface 5, the second step surface 6 and the third step surface 7 increase sequentially to meet the usage requirements of different positions.

[0023] The split nozzle 3 is correspondingly disposed in the mounting hole 4 of the nozzle body 2. The split nozzle has an axially penetrating jet port 8. The outer wall of the split nozzle 3 is correspondingly sealed with the first step surface 5. Specifically, the first step surface 5 is recessed and has an annularly distributed groove 9 and a corresponding sealing ring 10, thereby achieving a flexible seal and preventing the coolant from flowing out.

[0024] The outer wall of the split nozzle 3 corresponds to the second step surface 6 to form a cooling chamber 11, which is cooled by cooling water during operation.

[0025] The nozzle body 2 has multiple equally spaced annularly distributed cooling water inlet holes 12 at the front of the cooling chamber 11 and multiple equally spaced annularly distributed cooling water outlet holes 13 at the rear of the cooling chamber 11 for circulating cooling water supply.

[0026] The cooling water inlet holes 12 are distributed perpendicularly to the split nozzles 3, and the cooling water outlet holes 13 are distributed from the inside out and tilted backward to ensure effective cooling of the cooling water.

[0027] The outer wall of the split nozzle 3 is threadedly connected to the third step surface 7, which facilitates the assembly and disassembly of the entire split nozzle 3 structure.

[0028] The nozzle body 2 and the split nozzle 3 are respectively limited by the stepped structure 14 at the front end of the threaded connection, which facilitates the limited installation and avoids the phenomenon of mismatch in installation size.

[0029] In summary, the split nozzle structure of the plasma spray gun disclosed in this utility model is simple, reasonable, and reliable. It can be easily disassembled and replaced, and only damaged parts need to be replaced, which greatly reduces maintenance costs.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made using the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A split nozzle structure for a plasma spray gun, disposed inside the head of the plasma spray gun, characterized in that, The device includes a nozzle body and a split nozzle. The nozzle body has a cylindrical mounting hole that extends through it axially. The inner wall of the mounting hole has a stepped structure, including a first stepped surface, a second stepped surface, and a third stepped surface arranged sequentially from the outside to the inside. The split nozzle is correspondingly disposed in the mounting hole of the nozzle body. The split nozzle has a jet outlet that extends through it axially. The outer wall of the split nozzle is sealed to the first stepped surface, forms a cooling chamber to the second stepped surface, and is threaded to the third stepped surface. The nozzle body has a cooling water inlet at the front of the cooling chamber and a cooling water outlet at the rear of the cooling chamber.

2. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The diameters of the first, second, and third step surfaces increase sequentially.

3. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The first step surface has annularly distributed grooves and corresponding sealing rings.

4. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The nozzle body and the split nozzle are respectively limited by a stepped structure at the front end of the threaded connection.

5. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The cooling water inlet and cooling water outlet are provided in multiple and equally spaced rings.

6. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The cooling water inlet holes are distributed perpendicular to the split nozzles.

7. The split nozzle structure of the plasma spray gun according to claim 1, characterized in that, The cooling water outlet holes are distributed in a backward-sloping manner from the inside out.

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