Shell-and-tube heater

Abstract

The utility model provides a tube shell type heater which comprises a tube shell, a top cover, an inlet connector, an outlet connector, an inner connecting tube, a supporting column, a supporting disc, an electric heating wire and a lead. An inlet hole is formed in the middle of the top cover, and the inlet connector is connected to the middle of the outer side of the top cover and communicated with the inlet hole. The inner connecting pipe is connected to the middle position of the inner side of the top cover, and a plurality of flow guide holes are formed in the circumferential surface of the inner connecting pipe; the upper end of the supporting column is connected with and seals the lower end of the inner connecting pipe. The support column is arranged in the tube shell; a middle hole is formed in the middle of the supporting disc, and a plurality of positioning holes are formed in the supporting disc around the middle hole; the plurality of supporting discs are arranged on the supporting column at intervals in a sleeving manner through respective middle holes and are fixedly connected with the supporting column; a spiral electric heating wire penetrates through the positioning holes in the plurality of supporting discs and is wound on the plurality of supporting discs on the supporting column in a reciprocating manner; the utility model has the advantages of corrosion resistance and high heating efficiency, and can be widely used for heating various corrosive liquids.

Description

TECHNICAL FIELD

[0001] The utility model relates to a liquid heater, especially a shell-and-tube heater. BACKGROUND

[0002] In many fields, such as electroplating, medicine, photovoltaic and semiconductor production and processing fields, process liquid needs to be used, and these process liquids need to be heated; but many process liquids are often corrosive; if a metal heater resistant to corrosion is used, the price is high.

[0003] The heating efficiency of the liquid heater is also a link that needs to be considered in the design of the liquid heater. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model embodiment provides a shell-and-tube heater which is resistant to corrosion and has high heating efficiency and can be widely used for heating various corrosive liquids. To achieve the above technical purpose, the utility model embodiment adopts the technical scheme that:

[0005] The utility model embodiment provides a shell-and-tube heater, which comprises a shell, a top cover, an inlet joint, an outlet joint, an inner connecting pipe, a support column, a support disc, an electric heating wire and a lead wire.

[0006] The top cover is connected to the top end of the shell and seals the top end of the shell; and the bottom end of the shell is sealed.

[0007] An inlet hole is arranged at the middle position of the top cover, the inlet joint is connected to the middle position of the outer side of the top cover and communicates with the inlet hole, the inner connecting pipe is connected to the middle position of the inner side of the top cover, a plurality of flow guide holes are arranged on the peripheral surface of the inner connecting pipe, the inlet hole communicates with the internal space of the shell through the flow guide holes on the inner connecting pipe, and a plurality of lead wire holes are further arranged around the inlet hole on the top cover.

[0008] The upper end of the support column is connected to and seals the lower end of the inner connecting pipe; the support column is arranged in the shell and extends towards the bottom end of the shell; the middle hole is arranged in the middle of the support disc, a plurality of positioning holes are arranged around the middle hole on the support disc, and the plurality of support discs are respectively sleeved on the support column at intervals through the respective middle holes and are fixedly connected with the support column.

[0009] The spiral electric heating wire passes through the positioning holes on the plurality of support discs and reciprocally winds around the plurality of support discs on the support column; the two ends of each electric heating wire are provided with a lead wire; the lead wire extends to the outside of the top cover through the lead wire hole on the top cover and is fixed to the top cover through the lead wire fixing seat arranged on the outer side of the top cover.

[0010] The outlet joint is arranged on the lower side of the shell.

[0011] The tube shell, the top cover, the inlet joint, the outlet joint, the inner connecting pipe, the support column and the support disc are made of corrosion-resistant material; the electric heating wire and the lead wire are coated with corrosion-resistant insulating material.

[0012] Further, the tube shell, the top cover, the inlet joint, the outlet joint, the inner connecting pipe, the support column and the support disc are made of PP material or PTFE material.

[0013] Further, the electric heating wire and the lead wire are coated with PFA material.

[0014] Further, the top end of the tube shell is provided with a connecting flange; bolt holes are arranged in the edge area of the connecting flange and the top cover; and the top cover is connected with the connecting flange through bolts.

[0015] Further, a sealing groove is arranged on the top of the connecting flange of the tube shell, and a sealing ring is arranged in the sealing groove.

[0016] Further, the inlet joint is connected with the top cover through welding; and the outlet joint is connected with the tube shell through welding.

[0017] Further, the inner connecting pipe is connected with the top cover through welding.

[0018] Further, the upper end of the support column is connected with the lower end of the inner connecting pipe through threads.

[0019] Further, the support disc is fixedly connected with the support column through welding.

[0020] Further, the bottom end of the tube shell is further provided with a blowdown joint; and a blowdown valve is arranged on the blowdown joint.

[0021] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0022] 1) Good corrosion resistance and long service life.

[0023] 2) Easy assembly.

[0024] 3) High heating efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 The figure is a structural schematic diagram of the tube shell type heater in the embodiment of the utility model.

[0026] Figure 2 The figure is a schematic diagram of the top cover in the embodiment of the utility model.

[0027] Figure 3 The figure is a schematic diagram of the support disc in the embodiment of the utility model. DETAILED DESCRIPTION

[0028] In order to make the utility model purposes, technical solutions and advantages more clearly, the following will be further described in detail with the drawings and examples.

[0029] As Figure 1 shown, the utility model discloses a shell type heater, including shell 1, top 2, import joint 3, export joint 4, inner connecting pipe 5, support 6, support disc 7, heating wire 8 and lead 9;

[0030] Top 2 is connected at the top end of shell 1, and the top end of shell 1 is closed;The bottom end of shell 1 is closed.

[0031] The middle position of top 2 is equipped with import hole 201, and import joint 3 is connected at the middle position of the outside of top 2 and is communicated with import hole 201;Inner connecting pipe 5 is connected at the middle position of the inside of top 2, and a plurality of flow guide holes 501 are arranged on the circumferential surface of inner connecting pipe 5;Import hole 201 is communicated with the internal space of shell 1 through flow guide hole 501 on inner connecting pipe 5;A plurality of lead holes 202 are further arranged around import hole 201 on top 2;

[0032] The upper end of support 6 is connected and closed the lower end of inner connecting pipe 5;Support 6 is arranged in shell 1 and extends to the bottom end of shell 1;Middle hole 701 is arranged in support disc 7, and a plurality of positioning holes 702 are arranged around middle hole 701 on support disc 701;A plurality of support discs 7 are respectively sleeved on support 6 at intervals through respective middle holes 701 and are fixedly connected with support 6;

[0033] Spiral heating wire 8 passes through positioning hole 702 on a plurality of support discs 7 and reciprocally winds on a plurality of support discs 7 on support 6;Each heating wire 8 is provided with lead 9 at both ends;Lead 9 extends to the outside of top 2 through lead hole 202 on top 2 and is fixed on top 2 through lead fixing seat 901 arranged on the outside of top 2;

[0034] Export joint 4 is arranged on the lower side of shell 1.

[0035] Shell 1, top 2, import joint 3, export joint 4, inner connecting pipe 5, support 6 and support disc 7 all adopt corrosion-resistant material;Heating wire 8 and lead 9 are wrapped with corrosion-resistant insulating material.

[0036] In assembly, the inlet joint 3 and the inner connecting pipe 5 can be connected to the top cover 2 first; the plurality of support discs 7 are connected to the support column 6 at intervals; then the electric heating wire 8 is reciprocally wound on the plurality of support discs 7; then the upper end of the support column 6 is connected to the lower end of the inner connecting pipe 5; and then the pipe shell 1 is connected to the top cover 2; the pipe shell type heater provided by the embodiment of the utility model is convenient to assemble, and the assembly efficiency is improved.

[0037] In use, the liquid to be heated flows in from the inlet joint 3, flows into the inner connecting pipe 5 through the inlet hole 201 in the top cover 2, flows into the upper part of the inner space of the pipe shell 1 from the flow guide hole 501 on the inner connecting pipe 5, and then flows from top to bottom in the inner space of the pipe shell 1, fully contacts the electric heating wire 8 reciprocally wound on each support disc 7, and the heating efficiency is improved; and the heated liquid flows out from the outlet joint 4 at the lower side of the pipe shell 1.

[0038] Since the pipe shell 1, the top cover 2, the inlet joint 3, the outlet joint 4, the inner connecting pipe 5, the support column 6 and the support disc 7 are all made of corrosion-resistant materials, and the insulating material wrapped around the electric heating wire 8 and the lead wire 9 is also corrosion-resistant, the pipe shell type heater provided by the embodiment of the utility model is very suitable for heating corrosive liquid and has the advantage of long service life.

[0039] Specifically, the corrosion-resistant materials used for the pipe shell 1, the top cover 2, the inlet joint 3, the outlet joint 4, the inner connecting pipe 5, the support column 6 and the support disc 7 are PP materials or PTFE materials; the corrosion-resistant performance is good, and the pipe shell type heater can be applied to heating corrosive liquid for a long time.

[0040] Specifically, the insulating material wrapped around the electric heating wire 8 and the lead wire 9 is PFA material, and also has excellent corrosion-resistant performance.

[0041] Further, the top end of the pipe shell 1 is provided with a connecting flange 101; bolt holes 203 are arranged in the edge regions of the connecting flange 101 and the top cover 2; and the top cover 2 is connected to the connecting flange 101 through bolts.

[0042] More preferably, the top of the connecting flange 101 of the pipe shell 1 is provided with a ring of sealing grooves 102, and a sealing ring is arranged in the sealing grooves 102; so as to improve the sealing performance after the top cover 2 is connected to the pipe shell 1.

[0043] Specifically, the inlet joint 3 is connected to the top cover 2 through welding; and the outlet joint 4 is connected to the pipe shell 1 through welding; so as to ensure that the inlet joint 3 is firmly connected to the top cover 2 and the outlet joint 4 is firmly connected to the pipe shell 1.

[0044] Specifically, the inner connecting pipe 5 is connected to the top cover 2 through welding; so as to ensure that the inner connecting pipe 5 is firmly connected to the top cover 2.

[0045] Specifically, the upper end of the support column 6 is connected to the lower end of the inner connecting pipe 5 by screwing; the lower end of the inner connecting pipe 5 is provided with an inner thread, and the upper end of the support column 6 is provided with an outer thread, so that the two are more convenient to assemble.

[0046] In some embodiments, the support disc 7 is fixedly connected to the support column 6 by welding; the connection strength can be guaranteed.

[0047] More preferably, the bottom end of the pipe shell 1 is also provided with a blow-off joint 10; the blow-off joint 10 is provided with a blow-off valve; when the pipe shell heater is not used, the blow-off valve can be opened to empty the liquid in the pipe shell heater.

[0048] Finally, it should be explained that the above specific embodiments are only used to illustrate the technical solutions of the present application and are not limited. Although the present application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be covered in the scope of the claims of the present application.

Claims

1. A shell and tube heater characterized by, The shell (1), the top cover (2), the inlet joint (3), the outlet joint (4), the inner connecting pipe (5), the support column (6), the support disc (7), the electric heating wire (8) and the lead wire (9); The top cover (2) is connected to the top end of the shell (1) and seals the top end of the shell (1); the bottom end of the shell (1) is sealed; The inlet hole (201) is arranged at the middle position of the top cover (2), the inlet joint (3) is connected to the middle position of the outer side of the top cover (2) and communicates with the inlet hole (201); the inner connecting pipe (5) is connected to the middle position of the inner side of the top cover (2), a plurality of flow guide holes (501) are arranged on the peripheral surface of the inner connecting pipe (5); the inlet hole (201) communicates with the internal space of the shell (1) through the flow guide holes (501) on the inner connecting pipe (5); a plurality of lead wire holes (202) are further arranged on the top cover (2) around the inlet hole (201); The upper end of the support column (6) is connected to and seals the lower end of the inner connecting pipe (5); the support column (6) is arranged in the shell (1) and extends towards the bottom end of the shell (1); the middle hole (701) is arranged in the middle of the support disc (7), a plurality of positioning holes (702) are arranged on the support disc (7) around the middle hole (701); a plurality of support discs (7) are respectively and spacedly sleeved on the support column (6) through the respective middle holes (701) and are fixedly connected with the support column (6); The spiral electric heating wire (8) passes through the positioning holes (702) on the plurality of support discs (7) and reciprocally winds on the plurality of support discs (7) on the support column (6); the two ends of each electric heating wire (8) are provided with a lead wire (9); the lead wire (9) extends to the outside of the top cover (2) through the lead wire hole (202) on the top cover (2) and is fixed on the top cover (2) through the lead wire fixing seat (901) arranged on the outer side of the top cover (2); The outlet joint (4) is arranged on the lower side of the shell (1); The shell (1), the top cover (2), the inlet joint (3), the outlet joint (4), the inner connecting pipe (5), the support column (6) and the support disc (7) are made of corrosion-resistant materials; the electric heating wire (8) and the lead wire (9) are coated with corrosion-resistant insulating materials.

2. The shell-type heater according to claim 1, wherein The corrosion-resistant materials used by the shell (1), the top cover (2), the inlet joint (3), the outlet joint (4), the inner connecting pipe (5), the support column (6) and the support disc (7) are PP materials or PTFE materials.

3. The shell-type heater according to claim 1, wherein The insulating materials used for coating the electric heating wire (8) and the lead wire (9) are PFA materials.

4. The shell-type heater according to claim 1, wherein The top end of the shell (1) is provided with a connecting flange (101); the edge regions of the connecting flange (101) and the top cover (2) are both provided with bolt holes (203); the top cover (2) is connected to the connecting flange (101) through bolts.

5. The shell-type heater according to claim 4, wherein The connecting flange (101) of the tube shell (1) is provided with a sealing groove (102) at the top, and the sealing groove (102) is provided with a sealing ring.

6. The shell-and-tube heater according to claim 1, characterized in that, The inlet joint (3) is connected to the top cover (2) by welding; and the outlet joint (4) is connected to the tube shell (1) by welding.

7. The shell-and-tube heater according to claim 1, characterized in that, The inner connecting pipe (5) is connected to the top cover (2) by welding.

8. The shell-and-tube heater according to claim 1, characterized in that, The upper end of the support column (6) is threadedly connected to the lower end of the inner connecting pipe (5).

9. The shell-and-tube heater according to claim 1, characterized in that, The support disc (7) is fixedly connected to the support column (6) by welding.

10. The shell-and-tube heater according to claim 1, characterized in that, The bottom end of the tube shell (1) is further provided with a blowdown joint (10), and the blowdown joint (10) is provided with a blowdown valve.

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