CN214060626U - Internal heating type pipeline surface gas treatment device - Google Patents

Abstract

The utility model provides an internal heating formula pipeline surface gas treatment device, is including installing a first end cover and a second end cover at pending pipeline both ends, each end cover passes through locking Assembly and pending pipeline tip locking, be provided with on the first end cover and extend to the heating device of pending pipeline inner chamber, be provided with the gaseous pipeline of surface treatment to pending pipeline inner chamber on at least one in first end cover and the second end cover, preferred gaseous pipeline sets up on the second end cover, each end cover inboard sets up high temperature resistant sealed pad, locking Assembly includes jack catch and with jack catch complex fastener, heating device is preferably the heating rod. The utility model discloses a directly seal the pipeline of treating and construct the gas permeation working chamber, broken away from the reliance to special gas permeation stove, come control treatment temperature through interior heating method, carry out reliable interior surface treatment to the energy is practiced thrift, especially is fit for handling such as the nitridation to metal pipeline.

Description

Internal heating type pipeline surface gas treatment device

Technical Field

The utility model relates to a pipeline surface treatment technical field, concretely relates to internal heating formula pipeline surface gas processing apparatus.

Background

The surface treatment of the pipeline gas generally refers to a process of changing the surface physicochemical properties in a gas permeation mode aiming at the surface of the metal pipeline to achieve certain performance, for example, nitriding is one of the processes, the surface layer nitriding of the metal pipeline generally needs to use a special nitriding furnace, the whole metal pipeline is put into the nitriding furnace to be filled with nitriding gas (nitrogen/decomposed ammonia) and heated and kept for a sufficient time (2 hours to 20 hours).

In the above conventional gas surface treatment operation, both the inner wall and the outer wall of the metal pipe are treated with gas, and when the metal pipe to be treated belongs to a large-diameter long-sized pipe, the conventional integral surface treatment needs a large-sized special furnace body to be completed, and a large-sized gas permeation furnace such as a nitriding furnace has a problem of large investment regardless of construction or use, and in addition, when only the inner wall of the metal pipe is used as a main working surface and other protective layers are laid on the outer wall of the metal pipe, it is unnecessary to perform the same degree of gas treatment on both the inner wall and the outer wall of the metal pipe.

SUMMERY OF THE UTILITY MODEL

To metal pipeline gas surface treatment among the prior art must rely on special gas infiltration stove and be difficult only to the internal surface treatment problem, the utility model provides an internal heating formula pipeline surface gas treatment device seals through directly to metal pipeline and constructs the gas infiltration working chamber, controls the processing temperature through the internal heating mode, carries out reliable internal surface treatment to the energy is practiced thrift.

The utility model provides a technical scheme that its technical problem adopted does:

the internal heating type pipeline surface gas treatment device comprises a first sealing end cover and a second sealing end cover which are arranged at two ends of a pipeline to be treated, wherein the first sealing end cover is locked with one end part of the pipeline to be treated through a locking assembly, the second sealing end cover is locked with the other end part of the pipeline to be treated through the locking assembly, a heating device extending to an inner cavity of the pipeline to be treated is arranged on the first sealing end cover, and a gas pipeline for supplying surface treatment gas to the inner cavity of the pipeline to be treated is arranged on at least one of the first sealing end cover and the second sealing end cover.

In the internally heated pipe surface gas treatment apparatus as described above, the gas pipe is provided in the second hermetic end cap.

In the internal heating type pipeline surface gas treatment device, the first high-temperature-resistant gasket is arranged on the inner side of the first seal end cover, and the second high-temperature-resistant gasket is arranged on the inner side of the second seal end cover.

The internal heating type pipeline surface gas treatment device comprises a clamping jaw and a clamping piece matched with the clamping jaw, wherein the clamping jaw comprises a plurality of first clamping jaws arranged around a first sealing end cover and a plurality of second clamping jaws arranged around a second sealing end cover, and the clamping piece is arranged on the outer walls of two ends of the pipeline to be treated.

In the internal heating type pipeline surface gas treatment device, the outer end of the gas pipeline is connected with a treatment gas source through a gas valve.

The internal heating type pipeline surface gas treatment device is characterized in that a temperature detector and/or a pressure gauge are/is arranged on at least one of the first sealing end cover and the second sealing end cover and used for monitoring temperature and pressure.

In the internally heated pipe surface gas treatment apparatus as described above, a vacuum port is provided in at least one of the first end cap and the second end cap, for internal vacuum evacuation.

In the internal heating type pipeline surface gas treatment device, the one-way check valve is arranged at the vacuumizing opening.

According to the internal heating type pipeline surface gas treatment device, the clamping piece is a clamping block or a clamping ring and is fixed on the outer walls of the two ends of the pipeline to be treated in a welding or clamping manner.

In the internal heating type pipeline surface gas treatment device, the heating device is a heating rod.

The utility model has the advantages that:

the utility model provides a simple and easy, low-cost internal heating formula pipeline surface gas processing apparatus to the problem that current special gas infiltration stove can't adapt to some jumbo size work pieces, and to the metal pipeline that only has the treatment needs to the internal surface, fix two sealed end covers at the both ends of metal pipeline, heat for the pipeline and when heating, carry out air replacement to the intraductal working gas environment that makes basically keep in the pipe, carry out the gas infiltration processing at suitable temperature, get rid of the dependence to special gas infiltration stove especially large-scale and ultra-large-scale gas infiltration stove, can prepare the frock and carry out the gas infiltration processing to required metal pipeline anytime and anywhere according to the process needs and customer customization needs, reduce equipment and cycle cost, especially be fit for nitriding frock, for the more commonly used electric heating coil or flame gun heating mode of metal pipeline heating among the prior art, adopt the interior heating mode of cavity, install heating device on sealed end cover and go deep into inside the metal pipeline, directly follow the internal heating of metal pipeline for the heat is concentrated on metal pipeline's internal surface, easily forms interior wall high-temperature area, improves the temperature control accuracy more easily, improves heating efficiency, and the energy is practiced thrift.

Drawings

Fig. 1 is a cross-sectional view of a first end cap of an internal heating type pipeline surface gas treatment device according to the present invention.

Fig. 2 is a sectional view of a second end cap of the internal heating type pipeline surface gas treatment device of the present invention.

Fig. 3 is a perspective view of fig. 2.

Fig. 4 is a sectional view showing an operating state of the internal heating type pipeline surface gas treatment apparatus of the present invention.

The components denoted by the reference numerals in the figures are:

the device comprises a pipeline to be processed 00, a first sealing end cover 10, a heating device 11, a first high-temperature-resistant sealing gasket 12, a first clamping jaw 13, a vacuumizing port 14, a second sealing end cover 20, a gas pipeline 21, a second high-temperature-resistant sealing gasket 22, a second clamping jaw 23 and a clamping piece 30.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

Example 1

Referring to fig. 1 to 4, the internal heating type pipeline surface gas treatment device of the embodiment includes a first end cap 10 and a second end cap 20 installed at two ends of a pipeline 00 to be treated, the end caps are circular disc-shaped structures, the first end cap 10 is locked with one end of the pipeline 00 to be treated by a locking assembly, the second end cap 20 is locked with the other end of the pipeline 00 to be treated by a locking assembly, a heating device 11 extending to an inner cavity of the pipeline 00 to be treated is disposed on the first end cap 10, a gas pipeline 21 for supplying surface treatment gas to the inner cavity of the pipeline 00 to be treated is disposed on at least one of the first end cap 10 and the second end cap 20, and an outer end of the gas pipeline 21 is connected with a treatment gas source through a gas valve. As can be seen from fig. 2, in the present embodiment, the gas pipe 21 is disposed on the second end cap 20, opposite to the heating device 11.

Further, in the internal heating type pipeline surface gas treatment device of the embodiment, a first high temperature resistant sealing gasket 12 is arranged on the inner side of the first sealing end cover 10, a second high temperature resistant sealing gasket 22 is arranged on the inner side of the second sealing end cover 20 for improving the sealing performance between the pipeline 00 to be treated and the end cover, the locking component comprises a clamping jaw and a clamping piece 30 matched with the clamping jaw, the clamping jaw comprises a plurality of first clamping jaws 13 arranged around the first sealing end cover 10 and a plurality of second clamping jaws 23 arranged around the second sealing end cover 20, in the embodiment, six hinged connection points are uniformly arranged in the circumferential direction of each sealing end cover, one clamping jaw is arranged at each position, the clamping piece 30 is arranged on the outer walls of two ends of the pipeline 00 to be treated, the outer wall of a normal pipeline to be treated is smooth and has no bulge, so the clamping piece is arranged for fixing the clamping jaw, the clamping member 30 may be a clamping block or a clamping ring, and is fixed to the outer walls of the two ends of the pipeline 00 to be processed in a welding or clamping manner, and if the clamping member is in a welding manner, the key working parts (such as socket buckle) of the workpiece should be avoided.

In order to accurately control the heating and pressurizing conditions, a temperature detector and a pressure gauge are preferably mounted on at least one of the first sealing end cap 10 and the second sealing end cap 20 for temperature and pressure monitoring, and the embodiment is schematically shown on the same sealing end cap as the gas pipeline 21 in fig. 3.

In this embodiment, a vacuum port 14 is provided in the first end cap 10, and preferably, a one-way check valve is installed at the vacuum port 14 for internal vacuum pumping, and after the vacuum pumping, filling of the working gas is performed.

Preferably, the heating device 11 provided on the first end cap 10 and extending to the inner cavity of the pipeline 00 to be processed is a heating rod, as shown in fig. 1 and 4, preferably, the heating rod is a large-sized heating rod, and most preferably, the annular gap between the heating rod and the inner wall of the pipeline 00 to be processed is not greater than 5 cm, so as to further improve the heating efficiency of the heating rod on the inner wall of the pipeline to be processed, and the electrode of the heating rod is located at the outer side.

Example 2

By way of example, the internal heating type pipeline surface gas treatment device provided by the embodiment uses a metal pipeline as a using object, and is used as a nitriding tool, and in the nitriding process, a closed nitriding environment is formed inside the metal pipeline by utilizing the internal space of the metal pipeline and combining with inner cavity heating, so that the structure of a furnace body is omitted, and the investment is reduced.

As can be seen in fig. 4, the metal pipeline structure as the pipeline 00 to be processed is a pipe body with a certain wall thickness, the two ends are respectively a socket (large end) and a plug (small end), because the metal pipeline itself is a sealed cylinder, in the implementation process of this embodiment, a sealed cavity is formed by clamping a first end cover 10 and a second end cover 20 at the two ends of the metal pipeline, the metal pipeline itself is used as a nitriding furnace, a gas pipeline 21 on the second end cover 20 is used as a nitrogen-permeated gas pipeline, the inner end of the nitriding gas pipeline is communicated with the cavity in the metal pipeline, the outer end is connected with a nitriding gas source through a gas valve, nitriding gas is introduced into the pipe body after the gas valve is opened, and the metal pipeline is heated to make the metal pipeline present a high temperature state, and nitriding is performed on the inner wall of the metal pipeline.

In the specific working process, because nitriding generally needs to be at a temperature about a proper temperature (preferably 480-600 ℃) for iron metal pipe fittings), a relatively stable working temperature needs to be continuously provided for the metal pipeline through the built-in heating device 11, in the embodiment, the heating device 11 can select a far infrared electric heating rod or an electric ceramic heating rod to directly heat from the inside of the metal pipeline, so that heat is concentrated on the inner surface of the metal pipeline, an inner wall high-temperature region is easy to form, and compared with a more common electric heating coil or flame gun heating mode for heating the metal pipeline in the prior art, the heating mode in the cavity is easier to improve the temperature control accuracy, improve the heating efficiency and save energy.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should be able to make various modifications and improvements to the present invention without departing from the spirit of the present invention.

Claims (10)

1. An internal heating type pipeline surface gas treatment device is characterized by comprising a first sealing end cover (10) and a second sealing end cover (20) which are installed at two ends of a pipeline (00) to be treated, wherein the first sealing end cover (10) is locked with one end of the pipeline (00) to be treated through a locking assembly, the second sealing end cover (20) is locked with the other end of the pipeline (00) to be treated through a locking assembly, a heating device (11) extending to an inner cavity of the pipeline (00) to be treated is arranged on the first sealing end cover (10), and a gas pipeline (21) for supplying surface treatment gas to the inner cavity of the pipeline (00) to be treated is arranged on at least one of the first sealing end cover (10) and the second sealing end cover (20).

2. An internally heated pipe surface gas treatment apparatus according to claim 1, characterized in that the gas pipe (21) is provided on the second end closure (20).

3. An internally heated pipe surface gas treatment device according to claim 1, characterized in that a first high temperature resistant gasket (12) is provided inside the first end closure (10) and a second high temperature resistant gasket (22) is provided inside the second end closure (20).

4. An internally heated pipe surface gas treatment device according to claim 1, wherein the locking assembly comprises a jaw and a catch (30) cooperating with the jaw, the jaw comprising a plurality of first catches (13) arranged around a first end closure (10) and a plurality of second catches (23) arranged around a second end closure (20), the catch (30) being arranged on the outer wall of both ends of the pipe (00) to be treated.

5. An internally heated pipe surface gas treatment apparatus according to claim 1, characterized in that the outer end of the gas pipe (21) is connected to a source of treatment gas by a gas valve.

6. An internally heated pipe surface gas treatment apparatus according to claim 1, characterised in that a thermo and/or pressure gauge is mounted on at least one of the first and second end seals (10, 20).

7. An internally heated pipe surface gas treatment apparatus according to claim 1, characterised in that a vacuum port (14) is provided in at least one of the first end-cap (10) and the second end-cap (20).

8. An internally heated pipe surface treatment apparatus as claimed in claim 7, characterised in that a one-way check valve is mounted at the evacuation port (14).

9. An internally heated pipe surface gas treatment device according to claim 4, wherein said clamping members (30) are clamping blocks or rings fixed to the outer wall of the pipe (00) to be treated at both ends by welding or clamping.

10. An internally heated pipe surface gas treatment plant according to claim 1, characterized in that the heating means (11) is a heating rod.

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