Preheating equipment for mold

Abstract

The utility model relates to preheating equipment of a mold, which comprises an upper-layer runner and a lower-layer runner which are arranged in parallel up and down at an interval, the upper-layer flow channel comprises an upper gas inlet pipe section and an upper mixed gas pipe section, a plurality of upper gas outlet holes are formed in the upper mixed gas pipe section, and the plurality of upper gas outlet holes are uniformly distributed in the upper side of the upper mixed gas pipe section; each layer of flow channel comprises a gas inlet pipe section and a mixed gas pipe section, and a plurality of gas outlet holes are formed in the mixed gas pipe section; the gas inlet pipe section comprises a main pipe and a branch pipe, the main pipe comprises a first gas inlet and a second gas inlet, the second gas inlet is communicated with a gas outlet of the branch pipe, and a gas outlet of the main pipe is communicated with a gas inlet of the mixed gas pipe section. According to the utility model, the heating uniformity and the heating efficiency of the mold are improved, and the yield of cast products is favorably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to foundry technology field especially a preheating equipment of mould. BACKGROUND

[0002] In the casting production process, before the casting is formed, the mould needs to be heated to reduce the defects of the final product. Mould preheating can protect the mould, improve production efficiency, adjust the mould gap, control the mould temperature, ensure product quality, reduce energy consumption and environmental pollution.

[0003] In the prior art, the mould preheating device mainly adopts a layer of main runner, and the upper and lower of the layer of main runner are provided with gas outlets capable of spraying fire. The structure of the upper and lower gas outlets arranged on the single-layer runner cannot guarantee the uniformity of the gas pressure in the runner, resulting in that part of the gas outlets can spray fire, and the remaining part cannot spray fire, causing the technical problems of uneven heating, low utilization rate of fuel gas and low heating efficiency. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides a preheating equipment of mould, which aims to improve the uniformity of mould heating and improve the yield of cast products.

[0005] The technical scheme adopted by the utility model is as follows:

[0006] A preheating equipment of mould, comprising an upper layer runner and a lower layer runner, the upper layer runner and the lower layer runner are arranged in parallel and spaced apart;

[0007] The upper layer runner comprises an upper air inlet pipe section and an upper mixed gas pipe section, a plurality of upper gas outlets are arranged on the upper mixed gas pipe section, and the plurality of upper gas outlets are uniformly distributed on the upper side of the upper mixed gas pipe section;

[0008] The lower layer runner comprises a lower air inlet pipe section and a lower mixed gas pipe section, a plurality of lower gas outlets are arranged on the lower mixed gas pipe section, and the plurality of lower gas outlets are uniformly distributed on the lower side of the lower mixed gas pipe section;

[0009] The upper air inlet pipe section comprises an upper main pipe and an upper branch pipe, the upper main pipe comprises a first air inlet and a second air inlet, the second air inlet of the upper main pipe and the gas outlet of the upper branch pipe are communicated, and the gas outlet of the upper main pipe and the air inlet of the upper mixed gas pipe section are communicated;

[0010] The lower air inlet pipe section comprises a lower main pipe and a lower branch pipe, the lower main pipe comprises a first air inlet and a second air inlet, the second air inlet of the lower main pipe and the gas outlet of the lower branch pipe are communicated, and the gas outlet of the lower main pipe and the air inlet of the lower mixed gas pipe section are communicated.

[0011] Further technical scheme:

[0012] The upper mixed gas pipe section comprises an upper transverse distribution gas pipe and an upper annular pipe, the upper transverse distribution gas pipe is provided with an air inlet in the middle for communicating with the second air inlet of the upper main pipe, and the two ends of the upper transverse distribution gas pipe are air outlets for respectively communicating with the two sides of the upper annular pipe; the upper side of the upper annular pipe is uniformly distributed with a plurality of upper air outlets;

[0013] The upper transverse distribution gas pipe is provided with an upper longitudinal distribution gas pipe vertically communicating therewith at intervals, and the upper side of the upper longitudinal distribution gas pipe is provided with the upper air outlet.

[0014] The plurality of upper air outlets provided on the upper annular pipe are symmetrically distributed with the connecting line of the upper air outlets on all the upper longitudinal distribution gas pipes as the axis of symmetry.

[0015] The upper annular pipe takes the upper main pipe as the axis of symmetry, and the end joints of the upper annular pipe are respectively connected to the outer wall of the upper main pipe.

[0016] The lower mixed gas pipe section comprises a lower transverse distribution gas pipe and a lower annular pipe, the lower transverse distribution gas pipe is provided with an air inlet in the middle for communicating with the second air inlet of the lower main pipe, and the two ends of the lower transverse distribution gas pipe are air outlets for respectively communicating with the two sides of the lower annular pipe; the lower side of the lower annular pipe is uniformly distributed with a plurality of lower air outlets;

[0017] The lower annular pipe takes the lower main pipe as the axis of symmetry, and the end joints of the lower annular pipe are respectively connected to the outer wall of the lower main pipe.

[0018] The lower transverse distribution gas pipe is provided with a lower longitudinal distribution gas pipe vertically communicating therewith at intervals, and the lower side of the lower longitudinal distribution gas pipe is provided with the lower air outlet.

[0019] The plurality of lower air outlets provided on the lower annular pipe are symmetrically distributed with the connecting line of the lower air outlets on all the lower longitudinal distribution gas pipes as the axis of symmetry.

[0020] A first connecting reinforcing pipe is arranged between the lower longitudinal distribution gas pipe and the lower annular pipe; and a second connecting reinforcing pipe is arranged on the inner side of the lower annular pipe.

[0021] The upper air outlet is located on the inner side of the upper annular pipe close to the annular center, and the axial direction of the upper air outlet forms an angle of 15°-30° with the normal of the plane where the upper annular pipe is located.

[0022] The lower air outlet is located on the inner side of the lower annular pipe close to the annular center, and the axial direction of the lower air outlet forms an angle of 15°-30° with the normal of the plane where the upper annular pipe is located.

[0023] Adjusting valves are respectively arranged on the upper main pipe and the upper branch pipe.

[0024] The lower main pipe and the lower branch pipe are respectively provided with adjusting valves.

[0025] The upper flow channel and the lower flow channel are connected through support rods;

[0026] The lower flow channel is provided with support legs at the bottom;

[0027] The upper flow channel and / or the lower flow channel are provided with counterweights, which are arranged opposite to the upper inlet pipe section and / or the lower inlet pipe section, so that the preheating device is kept balanced.

[0028] The beneficial effects of the present application are as follows:

[0029] The flow channel is arranged in two layers, the upper layer and the lower layer, the upper air outlet holes of the upper flow channel are uniformly distributed, and the lower air outlet holes of the lower flow channel are uniformly distributed.

[0030] The flow channels are arranged in a symmetrical structure, so that the number, size and spacing of the upper / lower air outlet holes on both sides of the upper / lateral air distribution pipe / lower / lateral air distribution pipe are the same.

[0031] The upper / lower air outlet holes are inwardly inclined, which can produce more concentrated and uniform flames.

[0032] Other features and advantages of the present application will be described in the following description, or can be understood by implementing the present application. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1 The drawings are schematic views of the three-dimensional structure of the embodiments of the present application.

[0034] Figure 2 The drawings are schematic views of the three-dimensional structure of the embodiments of the present application.

[0035] Figure 3 The drawings are schematic views of the three-dimensional structure of the embodiments of the present application.

[0036] Figure 4 The drawings are schematic views of the three-dimensional structure of the embodiments of the present application. Figure 1 The drawings are schematic views of the three-dimensional structure of the embodiments of the present application.

[0037] Figure 5 Figure 1 is a sectional view of the upper annular pipe of the present application.

[0038] Figure 1 is a sectional view of the upper annular pipe of the present application. DETAILED DESCRIPTION

[0039] The specific embodiments of the present application will be described below with reference to the accompanying drawings.

[0040] Referring to Figure 1 and Figure 3 The preheating device of the mold of the present embodiment comprises an upper flow channel and a lower flow channel, and the upper flow channel and the lower flow channel are arranged in parallel and spaced apart;

[0041] The upper flow channel comprises an upper inlet pipe section and an upper mixed gas pipe section, and a plurality of upper gas outlets 5 are arranged on the upper mixed gas pipe section, and the plurality of upper gas outlets 5 are uniformly distributed on the upper side of the upper mixed gas pipe section.

[0042] The lower flow channel comprises a lower inlet pipe section and a lower mixed gas pipe section, and a plurality of lower gas outlets 6 are arranged on the lower mixed gas pipe section, and the plurality of lower gas outlets 6 are uniformly distributed on the lower side of the lower mixed gas pipe section.

[0043] The upper inlet pipe section comprises an upper main pipe 1 and an upper branch pipe 2, the upper main pipe 1 comprises a first gas inlet and a second gas inlet, the second gas inlet of the upper main pipe 1 and the gas outlet of the upper branch pipe 2 are communicated, and the gas outlet of the upper main pipe 1 and the gas inlet of the upper mixed gas pipe section are communicated.

[0044] The lower inlet pipe section comprises a lower main pipe 3 and a lower branch pipe 4, the lower main pipe 3 comprises a first gas inlet and a second gas inlet, the second gas inlet of the lower main pipe 3 and the gas outlet of the lower branch pipe 4 are communicated, and the gas outlet of the lower main pipe 3 and the gas inlet of the lower mixed gas pipe section are communicated.

[0045] As a preferred mode, the first gas inlet of the upper main pipe 1 and the gas inlet of the upper branch pipe 2 are respectively connected with an external combustible gas source and an air source, and after the two kinds of gas are mixed downstream of the upper main pipe 1, the mixed gas is input to the upper mixed gas pipe section.

[0046] As a preferred mode, in the use process of the present embodiment, ignition is carried out at any one of the upper gas outlets 5 on the upper mixed gas pipe section, the mixed gas is ignited, and the combustion flame is sprayed upward through each upper gas outlet 5.

[0047] As a preferred mode, the first gas inlet of the lower main pipe 3 and the gas inlet of the lower branch pipe 4 are respectively connected with the external combustible gas source and the air source, and the two kinds of gas are mixed after the downstream of the lower main pipe 3, and then input to the lower mixed gas pipe section.

[0048] As a preferred mode, in the use process of the embodiment, the mixed gas is ignited at any one of the lower gas outlets 6 on the lower mixed gas pipe section, and the combustion flame is sprayed downward through each lower gas outlet 6.

[0049] In the embodiment, the flow channels are arranged in two layers in an independent and spaced manner, the upper gas outlets 5 of the upper flow channels are uniformly distributed, and the lower gas outlets 6 of the lower flow channels are uniformly distributed. The upper mold in the mold opening state can be heated by spraying fire through the upper gas outlets 5, and the lower mold in the mold opening state can be heated by spraying fire through the lower gas outlets 6. Since the upper and lower flow channels are independently arranged, the gas pressure in each layer of flow channels is kept uniform, which can ensure that all gas outlets have flame sprayed out and improve the uniformity of heating.

[0050] As a preferred mode, the upper main pipe 1 and the upper branch pipe 2 are respectively provided with an adjusting valve 7. The gas flow of the upper flow channels is controlled through the adjusting valve 7, so as to control the size of the flame, realize the demand heating, and accurately control the preheating temperature of the upper mold.

[0051] As a preferred mode, the lower main pipe 3 and the lower branch pipe 4 are respectively provided with an adjusting valve 7. The gas flow of the lower flow channels is controlled through the adjusting valve 7, so as to control the size of the flame, realize the demand heating, and accurately control the preheating temperature of the lower mold.

[0052] The adjusting valve 7 is preferably a ball valve.

[0053] As a preferred mode, referring to Figure 1 and Figure 2 , the upper mixed gas pipe section includes an upper transverse gas distribution pipe 8 and an upper annular pipe 9, the upper transverse gas distribution pipe 8 is provided with a gas inlet in the middle for communicating with the second gas inlet of the upper main pipe 1, both ends of the upper transverse gas distribution pipe 8 are gas outlets for respectively communicating with both sides of the upper annular pipe 9; the upper side of the upper annular pipe 9 is uniformly distributed with a plurality of upper gas outlets 5;

[0054] As a preferred mode, the upper transverse gas distribution pipe 8 is provided with an upper longitudinal gas distribution pipe 10 vertically communicated therewith at intervals, and the upper side of the upper longitudinal gas distribution pipe 10 is provided with an upper gas outlet 5.

[0055] As a preferred mode, the plurality of upper gas outlets 5 provided on the upper annular pipe 9 are symmetrically distributed with the connecting line of the upper gas outlets 5 on all the upper longitudinal gas distribution pipes 10 as the axis of symmetry.

[0056] As a preferred mode, the upper annular pipe 9 takes the upper main pipe 1 as the axis of symmetry, and the end joints, i.e. the first joints 91 of the upper annular pipe 9 are respectively connected to the outer wall of the upper main pipe 1. It can be understood that the first joints 91 of the upper annular pipe 9 are not communicated with the main pipe 1.

[0057] By the above-mentioned symmetrical arrangement, the number, size and spacing of the upper gas outlets 5 on both sides of the upper transverse gas distribution pipe 8 are ensured to be the same. The uniform pressure ensures the flow rate of each upper gas outlet 5 to be consistent, thereby ensuring the uniformity of heating. The upper gas outlets 5 of the upper longitudinal gas distribution pipe 10 mainly provide the middle heat source, and the upper gas outlets 5 of the upper annular pipe 9 mainly provide the edge heat source.

[0058] As a preferred mode, referring to Figure 5 The upper gas outlets 5 are located on the inner side of the upper annular pipe 9 close to the annular center, and the angle a between the axial direction of the upper gas outlets 5 and the normal direction of the plane of the upper annular pipe 9 is 15°-30°, and further preferably 20°.

[0059] That is, the upper gas outlets 5 are preferably arranged inwardly inclined. This arrangement can produce a more concentrated and uniform flame, which is directly sprayed onto the upper die, increasing the contact area between the flame and the upper die. After contact, the flame will overflow and cover the upper die. This avoids virtual spraying of the flame and improves the utilization rate of the gas. In addition, the inwardly inclined design also helps to keep the flame stable and reduce the phenomenon of flame fluctuation or extinction caused by external air flow interference.

[0060] As a preferred mode, referring to Figure 1 and Figure 3 The lower gas mixing pipe section includes a lower transverse gas distribution pipe 12 and a lower annular pipe 11. The lower transverse gas distribution pipe 12 has a gas inlet in the middle for communicating with the second gas inlet of the lower main pipe 3, and the two ends of the lower transverse gas distribution pipe 12 are gas outlets for respectively communicating with the two sides of the lower annular pipe 11. The lower annular pipe 11 has a plurality of lower gas outlets 6 uniformly distributed on the lower side.

[0061] As a preferred mode, the lower annular pipe 11 takes the lower main pipe 3 as the axis of symmetry, and the end joint, i.e., the second joint 111, of the lower annular pipe 11 is connected to the outer wall of the lower main pipe 3. It can be understood that the second joint 111 of the lower annular pipe 11 is not communicated with the main pipe 1.

[0062] As a preferred mode, the lower transverse gas distribution pipe 12 is provided with a lower longitudinal gas distribution pipe 13 vertically communicated therewith at intervals, and the lower side of the lower longitudinal gas distribution pipe 13 is provided with a lower gas outlet 6.

[0063] As a preferred mode, the plurality of lower gas outlets 6 provided on the lower annular pipe 11 are symmetrically distributed with the connecting line of the lower gas outlets 6 on all the lower longitudinal gas distribution pipes 13 as the axis of symmetry.

[0064] Similarly, through the above-mentioned symmetrical arrangement, the number, size and spacing of the lower air outlets 6 on both sides of the lower transverse air distribution pipe 12 are ensured to be the same. This ensures uniform pressure and consistent flow rate of each lower air outlet 6, thereby ensuring uniform heating. The lower air outlets 6 on the lower longitudinal air distribution pipe 13 mainly provide a central heat source, and the lower air outlets 6 on the lower annular pipe 11 mainly provide an edge heat source.

[0065] As a preferred mode, the lower air outlets 6 are located on the inner side of the lower annular pipe 11 close to the annular center, and the lower air outlets 6 are axially inclined at an angle of 15°-30° to the normal of the plane on which the upper annular pipe 9 is located. The positional relationship between the lower air outlets 6 and the lower annular pipe 11 of the present embodiment can be seen from Figure 5 the structure after the upper structure is mirrored.

[0066] Similarly, the upper air outlets 5 are also preferably arranged inwardly inclined. This arrangement can produce a more concentrated and uniform flame, which is directly sprayed onto the lower mold, increasing the contact area between the flame and the lower mold. After contact, the flame will overflow and cover the lower mold. This avoids virtual spraying of the flame and improves the utilization rate of the gas. In addition, the inwardly inclined design also helps to keep the flame stable and reduce the phenomenon of flame fluctuation or extinction caused by external air flow interference.

[0067] As a preferred mode, the pipe diameter of each layer channel is 25 mm, and the wall thickness is 3 mm. Preferably, the upper / lower air outlets are arranged on the pipe by welding cutting, and the hole diameter is 4 mm.

[0068] As a preferred mode, the upper and lower layer channels are symmetrically arranged.

[0069] Referring to Figure 1 and Figure 4 , as a preferred mode, the upper layer channel and the lower layer channel are connected by a support rod 16 to form a whole.

[0070] The support rod 16 is preferably a hollow pipe, which is arranged vertically with the upper and lower layer channels respectively.

[0071] As a preferred mode, the lower layer channel is provided with a support leg 17 at the bottom, which facilitates the placement of the entire device on a stable horizontal surface.

[0072] The support leg 17 is preferably an L-shaped hollow pipe.

[0073] As a preferred mode, the upper layer channel and / or the lower layer channel is provided with a counterweight part 18, which is arranged opposite to the upper air inlet pipe section and / or the lower air inlet pipe section, so as to keep the preheating device balanced and prevent it from tilting.

[0074] The counterweight part 18 is preferably a hollow pipe surrounding a specific pipe rack structure.

[0075] Since the upper flow channel needs to bear more weight, as a preferred mode, the first connecting reinforcing pipe 14 is arranged between the lower longitudinal air distribution pipe 13 and the lower annular pipe 11.

[0076] The first connecting reinforcing pipe 14 is preferably a hollow pipe, and it is understood that the inside is not ventilated.

[0077] Since the upper flow channel needs to bear more weight, as a preferred mode, the second connecting reinforcing pipe 15 is arranged inside the lower annular pipe 11.

[0078] The second connecting reinforcing pipe 15 is preferably a hollow pipe, and it is understood that the inside is not ventilated.

[0079] It is understood by those skilled in the art that the above is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, and those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A preheating device for a mold, characterized in that, The upper layer flow channel and the lower layer flow channel are arranged in parallel and spaced apart; The upper layer flow channel comprises an upper inlet pipe section and an upper mixed gas pipe section, and a plurality of upper air outlets (5) are arranged on the upper mixed gas pipe section; The lower layer flow channel comprises a lower inlet pipe section and a lower mixed gas pipe section, and a plurality of lower air outlets (6) are arranged on the lower mixed gas pipe section; The upper inlet pipe section comprises an upper main pipe (1) and an upper branch pipe (2), the upper main pipe (1) comprises a first air inlet and a second air inlet, the second air inlet of the upper main pipe (1) is communicated with the air outlet of the upper branch pipe (2), and the air outlet of the upper main pipe (1) is communicated with the air inlet of the upper mixed gas pipe section; The lower inlet pipe section comprises a lower main pipe (3) and a lower branch pipe (4), the lower main pipe (3) comprises a first air inlet and a second air inlet, the second air inlet of the lower main pipe (3) is communicated with the air outlet of the lower branch pipe (4), and the air outlet of the lower main pipe (3) is communicated with the air inlet of the lower mixed gas pipe section.

2. The preheating apparatus of a mold according to claim 1, wherein The upper mixed gas pipe section comprises an upper transverse air distribution pipe (8) and an upper annular pipe (9), the upper transverse air distribution pipe (8) is provided with an air inlet in the middle portion for being communicated with the second air inlet of the upper main pipe (1), the two ends of the upper transverse air distribution pipe (8) are air outlets and are respectively communicated with the two sides of the upper annular pipe (9), and a plurality of upper air outlets (5) are uniformly distributed on the upper side of the upper annular pipe (9); A plurality of upper longitudinal air distribution pipes (10) are arranged on the upper transverse air distribution pipe (8) and are vertically communicated with the upper transverse air distribution pipe (8), and the upper side of each upper longitudinal air distribution pipe (10) is provided with an upper air outlet (5).

3. The preheating apparatus for a mold according to claim 2, characterized by The plurality of upper air outlets (5) arranged on the upper annular pipe (9) are symmetrically distributed with the connecting line of the upper air outlets (5) on all the upper longitudinal air distribution pipes (10) as the axis of symmetry.

4. The preheating apparatus for a mold according to claim 2, wherein The upper annular pipe (9) takes the upper main pipe (1) as the axis of symmetry, and the end joints of the upper annular pipe (9) are respectively connected to the outer wall of the upper main pipe (1).

5. The preheating apparatus for a mold according to claim 2, wherein The lower mixed gas pipe section comprises a lower transverse air distribution pipe (12) and a lower annular pipe (11), the lower transverse air distribution pipe (12) is provided with an air inlet in the middle portion for being communicated with the second air inlet of the lower main pipe (3), the two ends of the lower transverse air distribution pipe (12) are air outlets and are respectively communicated with the two sides of the lower annular pipe (11), and a plurality of lower air outlets (6) are uniformly distributed on the lower side of the lower annular pipe (11); The lower annular pipe (11) takes the lower main pipe (3) as the axis of symmetry, and the end joints of the lower annular pipe (11) are respectively connected to the outer wall of the lower main pipe (3).

6. The preheating apparatus for a mold according to claim 5, wherein A plurality of lower longitudinal air distribution pipes (13) are arranged on the lower transverse air distribution pipe (12) and are vertically communicated with the lower transverse air distribution pipe (12), and the lower side of each lower longitudinal air distribution pipe (13) is provided with a lower air outlet (6). The plurality of lower air outlets (6) arranged on the lower annular pipe (11) are symmetrically distributed with the connecting line of the lower air outlets (6) on all the lower longitudinal air distribution pipes (13) as the axis of symmetry.

7. Preheating apparatus for a mould according to claim 6, characterised in that The first connecting reinforcing pipe (14) is arranged between the lower longitudinal air distribution pipe (13) and the lower annular pipe (11); the second connecting reinforcing pipe (15) is arranged inside the lower annular pipe (11).

8. The preheating apparatus for a mold according to claim 5, wherein The upper air outlet hole (5) is located on the inner side of the upper annular pipe (9) close to the annular center, and the upper air outlet hole (5) is axially at an angle of 15°-30° with the normal of the plane where the upper annular pipe (9) is located. The lower air outlet hole (6) is located on the inner side of the lower annular pipe (11) close to the annular center, and the lower air outlet hole (6) is axially at an angle of 15°-30° with the normal of the plane where the upper annular pipe (9) is located.

9. The preheating apparatus of a mold according to claim 1, wherein The upper main pipe (1) and the upper branch pipe (2) are respectively provided with adjusting valves (7); The lower main pipe (3) and the lower branch pipe (4) are respectively provided with adjusting valves (7).

10. The preheating apparatus for a mold according to claim 1, wherein The upper layer flow channel and the lower layer flow channel are connected through the supporting rod (16); The lower layer flow channel is provided with supporting legs (17) at the bottom; The upper layer flow channel and / or the lower layer flow channel are provided with counterweight parts (18), which are arranged opposite to the upper air inlet pipe section and / or the lower air inlet pipe section, so that the preheating equipment is kept balanced.

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