CN211457487U

CN211457487U - Outer sleeve water pipe, tubular cathode emission gun and plasma generator

Info

Publication number: CN211457487U
Application number: CN201922135913.5U
Authority: CN
Inventors: 范景利; 姜国财; 张柯; 张兴; 呼志杰
Original assignee: Yantai Longyuan Power Technology Co Ltd
Current assignee: Yantai Longyuan Power Technology Co Ltd
Priority date: 2019-12-03
Filing date: 2019-12-03
Publication date: 2020-09-08
Anticipated expiration: 2029-12-03

Abstract

The utility model belongs to the technical field of plasma generator, a overcoat water pipe, tubular cathode emission rifle and plasma generator are disclosed, the overcoat water pipe is provided with the shoulder hole including first body, second body and the third body that connects gradually in the first body, and the shoulder hole is provided with connecting thread on keeping away from the pore wall of second body, and the external diameter of first body, third body and second body reduces in proper order. The gun body is connected with the tubular cathode, and the gun body is connected with the connecting thread and is abutted against the step surface of the stepped hole. The tubular cathode emission gun is connected with the anode to form a plasma generator. The tubular cathode emission gun has the advantages of stable and reliable axial positioning, controllable axial size, simple structure, easy assembly and disassembly, controllable axial size, indirect guarantee of arc starting gaps of cathode and anode end faces within a reasonable range, no need of repeated adjustment and measurement, thus guaranteeing the reliability and stability of arc starting of the generator and reducing the requirement on the skill level of workers.

Description

Outer sleeve water pipe, tubular cathode emission gun and plasma generator

Technical Field

The utility model relates to a plasma generator technical field especially relates to an overcoat water pipe, tubular cathode emission rifle and plasma generator.

Background

In the tubular cathode emission gun, although the outer water pipe is not a key performance component like the tubular cathode, the outer water pipe belongs to a key structural component, and whether the structure is reasonable or not directly determines the structural rationality of the tubular cathode emission gun, and finally influences the complexity of the structure of the plasma generator and the difficulty of early assembly and later maintenance.

For the direct current arc plasma generator adopting a tubular cathode structure, the basic structure is as follows: the discharge chamber is internally provided with an anode and a cathode which are respectively connected with the anode and the cathode of a direct current power supply, the anode adopts a tubular structure with two open ends, the cathode is in a tubular structure with one open end, and the anode and the cathode are fixed in mutual positions and require the end surface to keep a small stable gap. The structure can ensure that the high-frequency arc starting device can accurately and reliably discharge between the cathode and the anode to generate electric arc, thereby ensuring the normal operation of the plasma generator and meeting the requirements of production, technology and the like in the corresponding industrial field.

In order to meet the requirement that a small stable gap is reserved on the end faces of a cathode and an anode, adjustment is mostly carried out through a screw rod, a nut and the like at present, and then locking and fixing are carried out, so that although the requirement can be met, the defects of complex structure, difficulty in adjustment and the like are brought. Firstly, assembly, particularly maintenance on an engineering field is difficult, the qualified rate of gaps is greatly limited by the technical grade and responsibility of workers, and sometimes limited by some objective conditions, the gap between the end faces of a cathode and an anode cannot be measured, and the gap is too large or too small, so that arc starting can be impossible due to the phenomena of voltage, no current or short circuit, and further the plasma generator cannot normally run; and secondly, the manufacturing and management cost of the product is increased, and the profit margin is reduced, which does not meet the development requirements of modern enterprises.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an overcoat water pipe, this overcoat water pipe simple structure, the spare part assembly and the maintenance of being convenient for.

To achieve the purpose, the utility model adopts the following technical proposal:

a jacket water pipe comprises the following components connected in sequence:

the first pipe body is internally provided with a stepped hole;

the wall of the stepped hole, which is far away from the second pipe body, is provided with a connecting thread;

and the outer diameter of the first pipe body is larger than that of the third pipe body, and the outer diameter of the third pipe body is larger than that of the second pipe body.

As a preferable technical scheme of the outer sleeve water pipe, a plurality of threaded fastening holes are formed in the pipe wall of the first pipe body at intervals along the circumferential direction.

As the preferable technical scheme of the outer water pipe, the plurality of threaded fastening holes are uniformly distributed along the circumferential direction.

As the preferable technical scheme of the outer sleeve water pipe, a plurality of clamping surfaces are arranged on the outer wall of the first pipe body at intervals and used for being matched with a wrench.

As the preferable technical scheme of the outer sleeve water pipe, a plurality of clamping surfaces are uniformly distributed along the circumferential direction.

As a preferable technical solution of the above-mentioned jacket water pipe, the stepped hole includes a first hole and a second hole, the connecting thread is provided on the first hole, and the aperture of the second hole is smaller than the aperture of the first hole.

As a preferable technical solution of the above-mentioned jacket water pipe, both the inner diameter of the second pipe body and the inner diameter of the third pipe body are equal to the aperture of the second hole.

As a preferred technical solution of the above-mentioned jacket water pipe, the first pipe body, the second pipe body and the third pipe body are of an integrally formed structure.

Another object of the present invention is to provide a tubular cathode emission gun, which is easy to assemble and disassemble, easy to maintain, and high in reliability.

the utility model provides a tubular cathode emission rifle, includes the emission rifle body, tubular cathode and as above overcoat water pipe, the emission rifle body with tubular cathode connects, and the junction is located in the overcoat water pipe, the emission rifle body with connecting thread connect and butt in the step face of shoulder hole.

Yet another object of the present invention is to provide a plasma generator, which is easy to assemble and disassemble, easy to maintain, and highly reliable.

a plasma generator comprises an anode and the tubular cathode emission gun, wherein the anode is connected with the outer water pipe at intervals.

Compared with the prior art, the utility model discloses an advantage and beneficial effect lie in:

the utility model provides an overcoat water pipe, tubular cathode emission rifle and plasma generator, overcoat water pipe are provided with the shoulder hole including the first body, second body and the third body that connect gradually in the first body, are provided with connecting thread on the pore wall that the second body was kept away from to the shoulder hole, and the external diameter of first body, third body and second body reduces in proper order. The tubular cathode emission gun comprises an emission gun body, a tubular cathode and an outer water jacket pipe, wherein the emission gun body is connected with the tubular cathode, the joint of the emission gun body and the tubular cathode is located in the outer water jacket pipe, and the emission gun body is connected with the connecting thread and is abutted against the step surface of the stepped hole. The tubular cathode emission gun under the structure has stable and reliable axial positioning, controllable axial size, simple structure and easy assembly and disassembly, the tubular cathode emission gun is connected with the anode to form a plasma generator, the arc opening clearance of the end faces of the cathode and the anode is ensured within a reasonable range indirectly by the controllable axial size, and repeated adjustment and measurement are not needed, so that the reliability and stability of the arc opening of the generator are ensured, meanwhile, the labor intensity of workers during assembly and maintenance is reduced, and the requirement on the skill level of the workers is lowered.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of a jacket water pipe according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a threaded fastening hole of a jacket water pipe according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

fig. 4 is a partial sectional view of a tubular cathode emission gun according to an embodiment of the present invention.

In the figure:

1. a first pipe body; 11. connecting threads; 12. a threaded fastener hole; 13. a clamping surface 14, a step surface;

2. a second tube body; 21. a long round hole;

3. a third tube; 31. an outer circular surface; 32. a front end face;

4. fastening screws;

100. a gun body; 200. a water pipe is sleeved outside; 300. a tubular cathode.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention and the technical effect achieved by the present invention clearer, the technical solution of the present invention will be further explained by combining the drawings and by means of the specific implementation manner.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically connected or non-mechanically connected; can be directly connected or indirectly connected through an intermediate medium; either internally or in interactive relation. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature is "on" or "under" the second feature, and it is intended that the first and second features are in direct contact, or that the first and second features are not in direct contact, but are in contact with each other through another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment discloses an outer sleeve water pipe, which is a thin-walled round pipe-shaped part and comprises a first pipe body 1, a second pipe body 2 and a third pipe body 3 which are sequentially connected as shown in figures 1-3. Wherein, the external diameter of first body 1 is greater than the external diameter of third body 3, and the external diameter of third body 3 is greater than the external diameter of second body 2, and the external diameter of first body 1, the external diameter of third body 3 and the external diameter of second body 2 reduce in proper order promptly. A stepped hole is arranged in the first pipe body 1, and a connecting thread 11 is arranged on the hole wall of the stepped hole far away from the second pipe body 2 and used for connecting other parts.

Specifically, the stepped hole includes a first hole and a second hole, and the second hole is close to the inner diameter of the second pipe body 2. The first hole is provided with a connecting thread 11, the aperture of the second hole is smaller than that of the first hole, and a step surface 14 is formed at the joint of the first hole and the second hole. Further, the inner diameter of the second tube 2 and the inner diameter of the third tube 3 are both equal to the diameter of the second hole. Under the structure, the second hole, the inner hole of the second pipe body 2 and the inner hole of the third pipe body 3 jointly form a long round hole 21 for assembling other parts.

Preferably, first body 1, second body 2 and third body 3 are integrated into one piece structure, and processing is convenient, and is with low costs.

Further optionally, a plurality of threaded fastening holes 12 are circumferentially arranged on the pipe wall of the first pipe body 1 at intervals, and fastening screws 4 are connected in the threaded fastening holes 12 to fasten and mount the outer water pipe and other parts. Preferably, a plurality of the threaded fastening holes 12 are uniformly arranged in the circumferential direction to improve the uniform stability of the fastening connection. The number of the threaded fastening holes 12 can be designed according to actual needs, and is preferably two in the embodiment, and the two threaded fastening holes 12 are oppositely arranged.

In order to realize the threaded connection between the outer water pipe and other parts, a plurality of clamping surfaces 13 are arranged on the outer wall of the first pipe body 1 at intervals and used for being matched with a wrench. Preferably, the plurality of clamping surfaces 13 are arranged evenly along the circumferential direction. The clamping surface 13 is a plane structure, which is beneficial to the stable clamping and operation of the wrench. The number of the clamping surfaces 13 may be determined according to actual conditions, and six clamping surfaces 13 are preferably provided in the present embodiment.

In the present embodiment, the material of the outer jacket water pipe is preferably stainless steel or brass.

The embodiment also provides a tubular cathode emission gun and a plasma generator, the tubular cathode emission gun comprises an emission gun body 100, a tubular cathode 300 and the outer water pipe 200, the emission gun body 100 is connected with the tubular cathode 300, the connection position is positioned in the outer water pipe 200, and the emission gun body 100 is connected with the connecting thread 11 and abuts against the step surface 14 of the stepped hole. The plasma generator comprises an anode (not shown in the figure) and the tubular cathode emission gun, wherein the anode is indirectly connected with the outer sleeve water pipe 200 through other parts, and the anode and the outer sleeve water pipe 200 are arranged at intervals after the connection is finished, namely, a gap exists between the anode and the tubular cathode emission gun.

Specifically, the assembly structure of the tubular cathode emission gun is shown in fig. 4, and the assembly process comprises the following steps: first, the gun body 100 and the tubular cathode 300 are assembled together in a manner that is well known to those skilled in the art and will not be described herein; secondly, the outer sleeve water pipe 200 is screwed with the outer connecting thread on the gun body 100 through the connecting thread 11, and then the outer sleeve water pipe and the gun body 100 are sufficiently screwed through a wrench, and the step surface 14 of the step hole in the outer sleeve water pipe 200 is abutted against the corresponding step positioning surface of the gun body 100, so that the axial positioning precision and the dimensional stability of the cathode emission gun are improved; finally, the fastening screw 4 is screwed into the threaded fastening hole 12, so that the outer sleeve water pipe 200 can be effectively prevented from being loosened in the assembling or disassembling process of the emission gun, and the positioning precision and the size precision are influenced. The outer water pipe 200 is positioned by the smooth long round hole 21 and the stepped hole, so that the relative positions of the gun body 100 and the tubular cathode 300 are ensured, namely, the gun body does not move relatively in the axial direction, the distance L is stable, and the radial direction is kept concentric.

The outer circular surface 31 and the front end surface 32 of the third tube body 3 of the outer sleeve water tube 200 are installed in a matching way with other parts, the anode is assembled on the other parts to realize the connection with the outer sleeve water tube 200, and after the assembly is finished, a fixed gap, namely an arc starting gap is formed between the anode and the tubular cathode emission gun. The assembly structure can ensure the correct position of the tubular cathode emission gun in the plasma generator, namely, the gap (arc starting gap) between the end faces of the cathode and the anode can meet the requirements of design and performance without adjusting the position of the emission gun, and the reliability is higher.

In addition, in order to meet the requirements of different projects, the plasma generator needs to have specifications of different lengths, which requires designing emission guns of different length specifications to match with the plasma generator. Due to the above structure of the outer jacket water pipe 200, the length of the tubular cathode emission gun can be changed by only changing the length of the gun body 100. Therefore, even if the length of the gun is increased, the difficulty of manufacture is not significantly increased.

In conclusion, the tubular cathode emission gun provided by the embodiment has the advantages of stable and reliable axial positioning, controllable axial size, simple structure and easiness in assembly and disassembly, the tubular cathode emission gun and the anode are connected to form the plasma generator, the arc starting gap of the end faces of the cathode and the anode is indirectly ensured to be within a reasonable range by the controllable axial size, repeated adjustment and measurement are not needed, the arc starting reliability and stability of the generator are ensured, meanwhile, the labor intensity of workers during assembly and maintenance is reduced, and the requirement on the skill level of the workers is lowered.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a overcoat water pipe which characterized in that, including connecting gradually:

the pipe comprises a first pipe body (1), wherein a stepped hole is formed in the first pipe body (1);

the wall of the stepped hole, which is far away from the second pipe body (2), is provided with a connecting thread (11);

the outer diameter of the first pipe body (1) is larger than that of the third pipe body (3), and the outer diameter of the third pipe body (3) is larger than that of the second pipe body (2).

2. A jacket water pipe according to claim 1, wherein the pipe wall of the first pipe body (1) is provided with a plurality of threaded fastening holes (12) at intervals along the circumferential direction.

3. A jacket water pipe according to claim 2, wherein a plurality of the screw fastening holes (12) are uniformly arranged in a circumferential direction.

4. A jacket water pipe according to claim 1, characterized in that a plurality of clamping surfaces (13) are arranged on the outer wall of the first pipe body (1) at intervals for matching with a wrench.

5. A jacket water pipe according to claim 4, characterized in that a plurality of the clamping surfaces (13) are arranged uniformly in the circumferential direction.

6. The jacket water pipe according to claim 1, wherein the stepped hole comprises a first hole on which the connection thread (11) is provided and a second hole having a smaller diameter than the first hole.

7. A jacket water pipe according to claim 6, characterized in that the inner diameter of the second tube (2) and the inner diameter of the third tube (3) are both equal to the diameter of the second hole.

8. A jacket water pipe according to claim 1, characterized in that the first pipe body (1), the second pipe body (2) and the third pipe body (3) are of an integrally formed structure.

9. A tubular cathode emission gun, comprising an emission gun body (100), a tubular cathode (300) and the outer water pipe (200) as claimed in any one of claims 1 to 8, wherein the emission gun body (100) is connected with the tubular cathode (300) and the connection position is located in the outer water pipe (200), and the emission gun body (100) is connected with the connecting thread (11) and abuts against the step surface (14) of the stepped hole.

10. A plasma generator comprising an anode and a tubular cathode emission gun according to claim 9, said anode being spaced apart from said outer casing water tube (200).