Natural gas mold preheating device

Abstract

The utility model relates to the technical field of mold preheating, and discloses a natural gas mold preheating device which comprises a combustion tube and a connecting tube, and a plurality of air holes are formed in the side wall of the combustion tube; the nozzle structure comprises a hoop, an injection pipe, lug plates and mounting holes, the hoop forms an annular structure with a notch, the two lug plates locked through bolts are fixedly arranged at the notch of the hoop, the mounting holes are formed in the lug plates, the bolts are mounted in the mounting holes, the injection pipe is detachably connected with the hoop, the hoop is clamped on the outer wall of the combustion pipe, and the nozzle structure is formed by the mounting holes. The position of the clamp is adjusted to enable the injection pipe to directly face the gas hole, the bolt penetrates through the mounting hole, the fastening nut, the screw and the nut to enable the two lug plates to be close to each other, the clamp wraps the combustion pipe, fuel gas is sprayed out of the injection pipe, the injection pipe is used for replacing the combustion pipe to be ablated, and after long-term use, even if the injection pipe is ablated, the injection pipe cannot be damaged. And only a single injection pipe needs to be replaced, so that the later maintenance cost is reduced, and accidents caused by ablation of the combustion pipe are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould preheating technical field especially relates to a natural gas mould preheating device. BACKGROUND

[0002] When the mould is used to cast or forge workpieces, it is difficult to form, the film is adhered and the casting is cracked due to low temperature of the mould and high temperature of the casting melt, so the mould usually needs to be preheated, and a preheating device is needed during preheating.

[0003] The prior art discloses a metal mould preheating flame gun device (publication number: CN111189046A), the combustion pipe is of an annular structure, one end of the combustion pipe is connected with a fuel mixing connector pipe, the other end of the combustion pipe is connected with a support frame, the end of the fuel mixing connector pipe is respectively connected with a natural gas pipe joint and a low-pressure air pipe joint, a plurality of combustion holes are arranged on the annular combustion pipe, a natural gas regulating valve is arranged on the fuel mixing connector pipe and at the side of the natural gas pipe joint, a low-pressure air regulating valve is arranged on the fuel mixing connector pipe and at the side of the low-pressure air pipe joint, and the combustion holes are arranged in a staggered manner.

[0004] The prior art forms a flame to heat the mould by igniting the gas through the annular pipeline and the injection holes formed in the outer wall of the pipeline, and the mixed gas is directly discharged from the combustion pipe, so that the combustion pipe needs to be replaced as a whole when the injection holes of the combustion pipe are locally ablated, and the use cost is not favorable for maintenance in the later period, and there is a certain optimization space.

[0005] Therefore, the utility model provides a natural gas mould preheating device. UTILITY MODEL CONTENTS

[0006] The utility model mainly solves the technical problem of high overall replacement cost when the injection holes of the combustion pipe are locally ablated, and provides a natural gas mould preheating device.

[0007] In order to achieve the above purpose, the utility model adopts the following technical scheme, a natural gas mould preheating device, comprising:

[0008] The combustion pipe and the connector pipe are fixedly connected and communicated, a plurality of supporting legs are fixedly installed at the bottom of the connector pipe, and a plurality of gas holes are formed in the side wall of the combustion pipe.

[0009] The nozzle structure is detachably arranged on the wall surface of the combustion pipe and is used for guiding the gas discharged from the gas hole, the nozzle structure comprises a clamp, a jet pipe, an ear plate and a mounting hole, the clamp is formed in an annular structure with an opening, two ear plates locked by bolts are fixedly arranged at the opening of the clamp, the ear plate is provided with a mounting hole, and the bolt is installed in the mounting hole, the jet pipe is detachably connected with the clamp, and the jet pipe faces the gas hole.

[0010] As a preferred mode of the utility model, the clasp forms a C-shaped split ring, and the two ear plates are respectively located on the two sides of the split.

[0011] As a preferred mode of the utility model, the mounting hole forms a circular hole, the mounting holes of the two ear plates are aligned with each other, the bolt passes through the mounting hole and is locked by the nut to make the clasp contract.

[0012] As a preferred mode of the utility model, the nozzle structure further comprises an internal thread pipe, the internal thread pipe is fixedly connected with the clasp, and the injection pipe is threadedly connected with the internal thread pipe.

[0013] As a preferred mode of the utility model, the circumference of the clasp is provided with a hole, the port of the internal thread pipe is opposite to the hole and is welded with the clasp, the inner wall of the internal thread pipe is provided with threads, the outer wall of the injection pipe is provided with teeth, and the injection pipe is threadedly connected with the inner wall of the internal thread pipe.

[0014] As a preferred mode of the utility model, the injection pipe forms a circular pipe structure, and the end of the injection pipe away from the clasp forms a sealing portion.

[0015] As a preferred mode of the utility model, the nozzle structure further comprises flame holes, two circles of flame holes are uniformly formed on the circumference of the injection pipe, and the flame holes penetrate the wall surface of the injection pipe.

[0016] Advantages

[0017] The utility model provides a kind of natural gas mould preheating device.There is following beneficial effect:

[0018] 1. The natural gas mould preheating device, by setting detachable clasp, by being clamped in the outer wall of combustion pipe with clasp, adjusting the position of clasp makes that injection pipe is opposite to gas hole, bolt passes through mounting hole, fastens nut, screw rod and nut make that two ear plates are close to each other, and then the opening or contraction of clasp, clasp is wrapped in the outside of combustion pipe, gas is sprayed from injection pipe, using injection pipe instead of combustion pipe is ablated, after long-term use, even if injection pipe is ablated, just replace single injection pipe, reduce later maintenance cost, avoid combustion pipe to be ablated and cause accident simultaneously, with the characteristics of convenient disassembly and assembly, easy maintenance.

[0019] 2. The natural gas mould preheating device, by threadedly connecting injection pipe with internal thread pipe, realize the disassembly of injection pipe, replace ablated injection pipe simply and quickly, and the wall surface of injection pipe is provided with annular array distribution flame hole, can make that mixed gas is sprayed to the four around of injection pipe, form flame also to be sprayed to the four around, heating is uniform, combustion is sufficient. DRAWINGS

[0020] Figure 1 is one of the overall perspective views of the utility model;

[0021] Figure 2 is the second overall perspective view of the utility model;

[0022] Figure 3 is the perspective view of the nozzle structure of the utility model;

[0023] Figure 4 is the perspective view of the clamp of the utility model;

[0024] Figure 5 is the perspective view of the injection pipe of the utility model.

[0025] Legend: 10, combustion pipe; 11, connecting pipe; 12, air hole; 13, supporting leg; 20, clamp; 21, injection pipe; 22, ear plate; 23, mounting hole; 24, internal thread pipe; 25, flame hole. DETAILED DESCRIPTION

[0026] A natural gas mold preheating device, as shown in Figure 1 and Figure 2 , comprising:

[0027] The combustion pipe 10 and the connecting pipe 11 are fixedly connected and communicated with each other, the bottom of the connecting pipe 11 is fixedly installed with a plurality of supporting legs 13, and the side wall of the combustion pipe 10 is provided with a plurality of air holes 12. Among them, the connecting pipe 11 is connected with a joint, the joint is respectively connected with a low-pressure air pipe and a gas, of course, the low-pressure air pipe and the gas pipe connected with the joint should be installed with a regulating valve, the mixed ratio of the gas and the air is controlled to adjust the flame, the mixed gas enters the annular combustion pipe 10 and is sprayed from each air hole 12, the mixed gas is ignited to generate a flame for heating the mold, and four supporting legs 13 are arranged to support the combustion pipe 10.

[0028] As shown in Figure 2 , Figure 3 and Figure 4As shown, the nozzle structure is detachably arranged on the wall of the combustion pipe 10 for guiding the gas discharged from the gas hole 12, which comprises a clamp 20, a jet pipe 21, an ear plate 22 and a mounting hole 23. The clamp 20 forms an annular structure with an opening, two ear plates 22 fixedly arranged at the opening of the clamp 20 are locked by bolts, the ear plate 22 is provided with a mounting hole 23, the bolt is mounted in the mounting hole 23, the jet pipe 21 is detachably connected with the clamp 20, the jet pipe 21 is opposite to the gas hole 12, the clamp 20 forms a C-shaped open ring, the two ear plates 22 are respectively located on the two sides of the opening, the ear plate 22 is integrally formed with the clamp 20, the mounting hole 23 forms a circular hole, the mounting holes 23 of the two ear plates 22 are aligned with each other, the clamp 20 is contracted by the bolt passing through the mounting hole 23 and locked by the nut, the jet pipe 21 forms a circular pipe structure, and the end of the jet pipe 21 away from the clamp 20 forms a sealing end.

[0029] In the scheme, since the mixed gas is directly sprayed out of the gas hole 12 and ignited, it is easy to cause the combustion pipe 10 to be excessively deformed or damaged. In order to avoid the ablation of the combustion pipe 10 causing the damage and replacement of the whole combustion pipe 10, the detachable clamp 20 is arranged, the clamp 20 is clamped on the outer wall of the combustion pipe 10, the position of the clamp 20 is adjusted so that the jet pipe 21 is opposite to the gas hole 12, the bolt passes through the mounting hole 23, the nut is fastened, the screw rod and the nut make the two ear plates 22 close to each other, and then the opening of the clamp 20 is contracted or shrunk, the clamp 20 is wrapped outside the combustion pipe 10, the gas is sprayed out of the jet pipe 21, the jet pipe 21 is used instead of the combustion pipe 10 to be ablated, after long-term use, even if the jet pipe 21 is ablated, only the single jet pipe 21 needs to be replaced, the maintenance cost in the later period is reduced, and the accidents caused by the ablation of the combustion pipe 10 are avoided. It has the characteristics of convenient disassembly and maintenance.

[0030] As shown in Figure 4 and Figure 5 The nozzle structure further comprises an inner thread pipe 24, the inner thread pipe 24 is fixedly connected with the clamp 20, the jet pipe 21 is threadedly connected with the inner thread pipe 24, the circumferential surface of the clamp 20 is provided with a hole, the port of the inner thread pipe 24 is opposite to the hole and is welded and fixed with the clamp 20, the inner wall of the inner thread pipe 24 is provided with a thread, the outer wall of the jet pipe 21 is provided with a tooth, the jet pipe 21 is threadedly connected with the inner wall of the inner thread pipe 24, the nozzle structure further comprises a flame hole 25, the circumferential surface of the jet pipe 21 is uniformly provided with two circles of flame holes 25, the flame hole 25 penetrates the wall surface of the jet pipe 21, the jet pipe 21 is threadedly connected with the inner thread pipe 24 to realize the disassembly and replacement of the jet pipe 21, the jet pipe 21 is ablated, and the ring array distributed flame holes 25 on the wall surface of the jet pipe 21 can make the mixed gas spray around the jet pipe 21, form the flame which is also sprayed around, heat uniformly and burn fully.

[0031] In order to guarantee the sealing between the injection pipe 21 and the internal thread pipe 24 and the clamp 20 and the combustion pipe 10, high-temperature-resistant sealing glue can be coated on the outer wall of the injection pipe 21 and the inner wall of the clamp 20 to guarantee the air tightness, and the specific type of the sealing glue is not limited here.

[0032] The working principle of the utility model is: the connecting pipe 11 is connected with a joint, the joint is connected with a low-pressure air pipe and a gas pipe respectively, of course, the low-pressure air pipe and the gas pipe connected with the joint should be installed with regulating valves to control the mixing ratio of the gas and the air to adjust the flame.

[0033] The clamp 20 is clamped on the outer wall of the combustion pipe 10, the position of the clamp 20 is adjusted so that the injection pipe 21 is opposite to the air hole 12, the bolt is passed through the mounting hole 23, the nut is fastened, the screw rod and the nut make the two ear plates 22 close to each other, and then the opening of the clamp 20 is contracted, the clamp 20 is wrapped outside the combustion pipe 10, the injection pipe 21 is screwed with the internal thread pipe 24, the disassembly and assembly of the injection pipe 21 are realized, the mixed gas enters the injection pipe 21, passes through the annular array distributed flame holes 25 on the wall surface of the injection pipe 21, and can make the mixed gas spray around the injection pipe 21 to form a flame.

[0034] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A natural gas mold preheating device characterized by, The utility model relates to a combustion pipe (10) and a connecting pipe (11) are fixedly connected with the combustion pipe (10) and communicate with each other, a plurality of supporting legs (13) are fixedly installed at the bottom of the connecting pipe (11), a plurality of air holes (12) are formed in the side wall of the combustion pipe (10); A nozzle structure is detachably arranged on the wall of the combustion pipe (10) to guide the gas discharged from the air holes (12), the nozzle structure comprises a clamp (20), a jet pipe (21), an ear plate (22) and a mounting hole (23), the clamp (20) forms an annular structure with an opening, two ear plates (22) are fixedly arranged at the opening of the clamp (20) and locked by bolts, the ear plate (22) is provided with a mounting hole (23), and the bolt is mounted in the mounting hole (23), the jet pipe (21) is detachably connected with the clamp (20), and the jet pipe (21) faces the air hole (12). The clamp (20) forms an open ring in the shape of C, the two ear plates (22) are respectively located on the two sides of the opening, and the ear plate (22) is integrally formed with the clamp (20).

2. The natural gas mold preheating device of claim 1, wherein: The mounting hole (23) forms a circular hole, the mounting holes (23) of the two ear plates (22) are aligned with each other, the bolt passes through the mounting hole (23) and is locked by a nut to make the clamp (20) shrink.

3. The natural gas mold preheating device of claim 1, wherein: The nozzle structure further comprises an inner thread pipe (24), the inner thread pipe (24) is fixedly connected with the clamp (20), and the jet pipe (21) is threadedly connected with the inner thread pipe (24).

4. The natural gas mold preheating device of claim 1, wherein: The circumferential surface of the clamp (20) is provided with a hole, the port of the inner thread pipe (24) faces the hole and is welded with the clamp (20), the inner wall of the inner thread pipe (24) is provided with threads, the outer wall of the jet pipe (21) is provided with teeth, and the jet pipe (21) is threadedly connected with the inner wall of the inner thread pipe (24).

5. The natural gas die preheating device of claim 4, wherein: The jet pipe (21) forms a circular pipe structure, and the end of the jet pipe (21) away from the clamp (20) forms a sealing portion.

6. The natural gas mold preheating device of claim 1, wherein: The nozzle structure further comprises flame holes (25), the circumferential surface of the jet pipe (21) is uniformly provided with two circles of flame holes (25), and the flame holes (25) penetrate the wall of the jet pipe (21).

7. The natural gas mold preheating device of claim 1, wherein: ​

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