Liquid heater

Abstract

The utility model provides a liquid heater which comprises a first end cover, a second end cover, a middle cylinder, an inner cylinder, a shell and an electric heating wire. The two ends of the shell are connected with the first end cover and the second end cover respectively, and a liquid heating space is formed in the shell. The first end of the middle cylinder is connected to the butt joint portion on the inner side of the first end cover, the second end of the middle cylinder extends towards the second end cover, and a gap is reserved between the second end of the middle cylinder and the second end cover. A gap is reserved between the middle cylinder and the shell; a spacer is arranged in the middle cylinder and deviates to the first end of the middle cylinder, and the spacer divides the middle cylinder into a connector section and a heating section; a plurality of flow dividing holes are formed in the interface section of the middle cylinder in the circumferential direction; the shunting holes are communicated with the internal space of the interface section of the middle cylinder and a gap between the middle cylinder and the shell; an electric heating wire is arranged around the periphery of the heating section of the middle cylinder; the first end of the inner cylinder is connected to the butt joint part on the inner side of the second end cover, and the inner cylinder is inserted into the middle cylinder; the utility model has good corrosion resistance and is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of heaters, especially a liquid heater. BACKGROUND

[0002] In the field of photovoltaic, semiconductor etc., some processes need to use heated liquid in the manufacturing process of product;And some liquid has corrosive nature. General metal heater is not corrosion resistant, and the corrosive nature of chemical liquid can corrode metal heater.

[0003] The liquid heater with corrosion resistance in the prior design has complex structure and low assembly efficiency. SUMMARY

[0004] To solve the problems in the prior art, the utility model embodiment provides a kind of liquid heater, with excellent corrosion resistance, can be used for the heating of corrosive liquid;And structure is reasonable, improve assembly efficiency. To achieve the above technical purpose, the technical scheme adopted by the utility model embodiment is as follows:

[0005] The utility model embodiment provides a kind of liquid heater, including first end cover, second end cover, intermediate cylinder, inner tube, shell, heating wire;

[0006] The intermediate cylinder and inner tube are both open at both ends;The heating wire is wrapped with insulating material;

[0007] The both ends of the shell are connected with first end cover and second end cover respectively, to form the heating space of liquid in shell;

[0008] The first end of the intermediate cylinder is connected to the inboard butt joint of first end cover, and the second end of the intermediate cylinder extends towards the second end cover, leaving a gap between the second end cover;The intermediate cylinder and shell leave a gap;The intermediate cylinder is provided with a baffle towards the first end position in the intermediate cylinder, and the baffle divides the intermediate cylinder into interface section and heating section;A plurality of shunt holes are opened in the circumferential direction of the interface section of the intermediate cylinder;The shunt hole communicates the internal space of the interface section of the intermediate cylinder and the gap between the intermediate cylinder and shell;The heating wire is arranged around the outer periphery of the heating section of the intermediate cylinder;

[0009] The first end of the inner tube is connected to the inboard butt joint of second end cover, and the inner tube is inserted into the intermediate cylinder, and the second end of the inner tube extends towards the first end cover, leaving a gap between the baffle in the intermediate cylinder;The inner tube and intermediate cylinder leave a gap;The heating wire is arranged around the outer periphery of the inner tube;

[0010] The first end cover is provided with an inlet channel and an inlet connector, and the inlet connector communicates with the internal space of the interface section of the intermediate cylinder through the inlet channel;

[0011] The second end cover is provided with an outlet channel and an outlet joint, and the outlet joint communicates with the inner space of the inner cylinder through the outlet channel.

[0012] The first end cover, the second end cover, the intermediate cylinder, the inner cylinder and the shell are made of corrosion-resistant materials.

[0013] Further, the corrosion-resistant materials used by the first end cover, the second end cover, the intermediate cylinder, the inner cylinder and the shell are PTFE materials.

[0014] Further, the insulating material wrapped around the electric heating wire is PFA material.

[0015] Further, the inner side butt joint part of the first end cover is provided with an internal thread, the first end of the intermediate cylinder is provided with an external thread, and the first end of the intermediate cylinder is threadedly connected to the inner side butt joint part of the first end cover.

[0016] Further, the inner side butt joint part of the second end cover is provided with an internal thread, the first end of the inner cylinder is provided with an external thread, and the first end of the inner cylinder is threadedly connected to the inner side butt joint part of the second end cover.

[0017] Further, the inner side end of the first end cover and the second end cover is respectively provided with an inner-retracted butt joint step, and the two ends of the shell are respectively sleeved with the butt joint steps on the first end cover and the second end cover.

[0018] Further, the shunt holes are uniformly distributed in the circumferential direction of the interface section of the intermediate cylinder.

[0019] Further, a plurality of retaining pieces are uniformly distributed along the axial direction of the inner cylinder on the outer periphery of the inner cylinder, each retaining piece is provided with a plurality of fixing holes, the electric heating wire passes through the fixing holes on each retaining piece and is arranged around the outer periphery of the inner cylinder.

[0020] Further, the inner cylinder and the retaining pieces on the outer periphery of the inner cylinder are integrally formed.

[0021] Further, a plurality of retaining pieces are uniformly distributed along the axial direction of the intermediate cylinder on the outer periphery of the intermediate cylinder, each retaining piece is provided with a plurality of fixing holes, the electric heating wire passes through the fixing holes on each retaining piece and is arranged around the outer periphery of the intermediate cylinder.

[0022] Further, the intermediate cylinder and the retaining pieces on the outer periphery of the intermediate cylinder are integrally formed.

[0023] The technical scheme provided by the embodiment of the utility model has the beneficial effects that:

[0024] 1) It has excellent corrosion resistance and can be used for heating corrosive liquid.

[0025] 2) Long service life.

[0026] 3) Easy assembly, improving assembly efficiency. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the liquid heater structure in an embodiment of the present invention.

[0028] Figure 2 This is a schematic diagram of the inner cylinder in an embodiment of the present utility model. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0030] like Figure 1 As shown in the figure, a liquid heater proposed in this embodiment of the present invention includes a first end cap 1, a second end cap 2, an intermediate cylinder 3, an inner cylinder 4, a shell 5, and a heating wire 6;

[0031] Both the intermediate cylinder 3 and the inner cylinder 4 are open at both ends; the heating wire 6 is covered with insulating material.

[0032] The two ends of the housing 5 are respectively connected to the first end cap 1 and the second end cap 2, forming a heating space for liquid inside the housing 5;

[0033] The first end of the intermediate cylinder 3 is connected to the inner mating part of the first end cap 1, and the second end of the intermediate cylinder 3 extends toward the second end cap 2, leaving a gap between it and the second end cap 2; a gap is left between the intermediate cylinder 3 and the shell 5; a partition 301 is provided inside the intermediate cylinder 3, biased toward its first end, and the partition 301 divides the intermediate cylinder 3 into an interface section 302 and a heating section 303; multiple diversion holes 304 are opened around the interface section 302 of the intermediate cylinder 3; the diversion holes 304 connect the internal space of the interface section 302 of the intermediate cylinder 3 and the gap between the intermediate cylinder 3 and the shell 5; an electric heating wire 6 is arranged around the outer periphery of the heating section 303 of the intermediate cylinder 3;

[0034] The first end of the inner cylinder 4 is connected to the inner side of the second end cap 2. The inner cylinder 4 is inserted into the intermediate cylinder 3. The second end of the inner cylinder 4 extends toward the first end cap 1 and leaves a gap with the partition 301 inside the intermediate cylinder 3. A gap is left between the inner cylinder 4 and the intermediate cylinder 3. A heating wire 6 is arranged around the outer periphery of the inner cylinder 4.

[0035] The first end cap 1 is provided with an inlet channel 101 and an inlet connector 102. The inlet connector 102 communicates with the internal space of the interface section 302 of the intermediate cylinder 3 through the inlet channel 101.

[0036] The second end cover 2 is provided with an outlet channel 201 and an outlet joint 202, and the outlet joint 202 communicates with the inner space of the inner cylinder 4 through the outlet channel 201.

[0037] The first end cover 1, the second end cover 2, the intermediate cylinder 3, the inner cylinder 4 and the shell 5 are made of corrosion-resistant materials.

[0038] In some embodiments, the electric heating wire 6 on the outer periphery of the intermediate cylinder 3 can be led out from the first end cover 1 or the second end cover 2 through a lead wire; the electric heating wire 6 on the outer periphery of the inner cylinder 4 can be led out from the second end cover 2 through a lead wire; the liquid to be heated enters the inner space of the interface section 302 of the intermediate cylinder 3 from the inlet joint 102 and the inlet channel 101, and then flows to the gap between the intermediate cylinder 3 and the shell 5 through the plurality of shunt holes 304; the plurality of shunt holes 304 can make the liquid flow to the gap between the intermediate cylinder 3 and the shell 5 in the circumferential direction; in Figure 1 In some embodiments, the liquid flows from the gap between the intermediate cylinder 3 and the shell 5 to the second end cover 2, is heated by the electric heating wire 6 on the outer periphery of the intermediate cylinder 3, then flows through the gap between the second end of the intermediate cylinder 3 and the second end cover 2, turns to flow into the gap between the inner cylinder 4 and the intermediate cylinder 3, and then flows from the gap between the inner cylinder 4 and the intermediate cylinder 3 to the first end cover 1; the liquid is heated by the electric heating wire 6 on the outer periphery of the inner cylinder 4, then flows through the gap between the second end of the inner cylinder 4 and the partition 301, turns to flow into the inner space of the inner cylinder 4, continues to flow to the second end cover 2, and finally flows out from the outlet channel 201 and the outlet joint 202; in the liquid heater provided by the utility model, the liquid flows to the gap between the intermediate cylinder 3 and the shell 5 in the circumferential direction 360, and then flows back and forth in the shell 5 along the axial direction of the shell 5, and is heated by the electric heating wire 6 on the outer periphery of the intermediate cylinder 3 and the electric heating wire 6 on the outer periphery of the inner cylinder 4; the first end cover 1, the second end cover 2, the intermediate cylinder 3, the inner cylinder 4 and the shell 5 are made of corrosion-resistant materials, and the electric heating wire 6 is generally wrapped with corrosion-resistant insulation materials; therefore, the liquid heater provided by the utility model can not only heat water, but also heat corrosive liquids.

[0039] Specifically, the corrosion-resistant materials used by the first end cover 1, the second end cover 2, the intermediate cylinder 3, the inner cylinder 4 and the shell 5 are PTFE materials, which have good corrosion resistance and improve the service life of the liquid heater.

[0040] Specifically, the insulation materials wrapped by the electric heating wire 6 are PFA materials, which have excellent corrosion resistance and improve the service life of the electric heating wire 6.

[0041] More preferably, the inner side abutting portion of the first end cover 1 is provided with an internal thread, the first end of the intermediate cylinder 3 is provided with an external thread, and the first end of the intermediate cylinder 3 is threadedly connected to the inner side abutting portion of the first end cover 1.

[0042] More preferably, the inner mating part of the second end cap 2 is provided with an internal thread, and the first end of the inner cylinder 4 is provided with an external thread; the first end of the inner cylinder 4 is threadedly connected to the inner mating part of the second end cap 2.

[0043] During assembly, after the heating wire 6 is wound around the outer circumference of the intermediate cylinder 3 and the outer circumference of the inner cylinder 4 respectively, the first end of the intermediate cylinder 3 is threaded to the inner mating part of the first end cover 1, the shell 5 is fitted onto the first end cover 1, and then the first end of the inner cylinder 4 is threaded to the inner mating part of the second end cover 2; the inner cylinder 4 is inserted into the intermediate cylinder 4, and the shell 5 is fitted onto the second end cover 2; the liquid heater proposed in this utility model is easy to assemble, improves assembly efficiency, and reduces labor costs.

[0044] More preferably, the inner side of the first end cap 1 and the second end cap 2 are respectively provided with an inwardly recessed mating step 103; the two ends of the housing 5 are respectively fitted with the mating step 103 on the first end cap 1 and the second end cap 2; and then fixed with glue or welding to avoid liquid leakage.

[0045] More preferably, the diversion holes 304 are evenly distributed circumferentially in the interface section 302 of the intermediate cylinder 3, so that the liquid is evenly dispersed and flows into the gap between the intermediate cylinder 3 and the shell 5 within a circumferential range of 360°.

[0046] In an optimized embodiment, such as Figure 2 As shown, multiple retaining plates 7 are evenly distributed along the axial direction of the inner cylinder 4 on the outer periphery of the inner cylinder 4; each retaining plate 7 is provided with multiple fixing holes 701, and the heating wire 6 passes through the fixing holes 701 on each retaining plate 7 and is arranged around the outer periphery of the inner cylinder 4; the retaining plate 7 can serve as a retainer for the heating wire 6; at the same time, it allows the heating wire 6 to detach from the outer wall of the inner cylinder 4 and be able to fully contact the liquid.

[0047] More preferably, the inner cylinder 4 and the retaining piece 7 on the outer periphery of the inner cylinder 4 are integrally formed; for example, by injection molding, the assembly process can be simplified.

[0048] Similarly, multiple retaining plates 7 are evenly distributed along the axial direction of the intermediate cylinder 3 on the outer periphery of the intermediate cylinder 3; each retaining plate 7 is provided with multiple fixing holes 701, and the heating wire 6 passes through the fixing holes 701 on each retaining plate 7 and is arranged around the outer periphery of the intermediate cylinder 3.

[0049] More preferably, the intermediate cylinder 3 and the retaining piece 7 on the outer periphery of the intermediate cylinder 3 are integrally formed.

[0050] 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 limiting. 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 liquid heater characterised in that, The liquid heater comprises a first end cover (1), a second end cover (2), a middle cylinder (3), an inner cylinder (4), a shell (5) and an electric heating wire (6); Both the middle cylinder (3) and the inner cylinder (4) are open at both ends; the electric heating wire (6) is wrapped with an insulating material; Both ends of the shell (5) are connected with the first end cover (1) and the second end cover (2) respectively, and a liquid heating space is formed in the shell (5); The first end of the middle cylinder (3) is connected with an inner side butt joint portion in the first end cover (1), the second end of the middle cylinder (3) extends towards the second end cover (2) and leaves a gap with the second end cover (2); a gap is left between the middle cylinder (3) and the shell (5); a partition (301) is arranged in the middle cylinder (3) and is biased towards the first end position of the middle cylinder (3), the partition (301) divides the middle cylinder (3) into an interface section (302) and a heating section (303); a plurality of shunt holes (304) are formed in the interface section (302) of the middle cylinder (3) in a circumferential direction; the shunt holes (304) are connected with the internal space of the interface section (302) of the middle cylinder (3) and the gap between the middle cylinder (3) and the shell (5); the electric heating wire (6) is arranged around the outer periphery of the heating section (303) of the middle cylinder (3); The first end of the inner cylinder (4) is connected with an inner side butt joint portion in the second end cover (2), the inner cylinder (4) is inserted into the middle cylinder (3), the second end of the inner cylinder (4) extends towards the first end cover (1) and leaves a gap with the partition (301) in the middle cylinder (3); a gap is left between the inner cylinder (4) and the middle cylinder (3); the electric heating wire (6) is arranged around the outer periphery of the inner cylinder (4); The first end cover (1) is provided with an inlet channel (101) and an inlet connector (102), the inlet connector (102) is connected with the internal space of the interface section (302) of the middle cylinder (3) through the inlet channel (101); The second end cover (2) is provided with an outlet channel (201) and an outlet connector (202), the outlet connector (202) is connected with the internal space of the inner cylinder (4) through the outlet channel (201); The first end cover (1), the second end cover (2), the middle cylinder (3), the inner cylinder (4) and the shell (5) are made of a corrosion-resistant material.

2. The liquid heater according to claim 1, wherein The corrosion-resistant material used by the first end cover (1), the second end cover (2), the middle cylinder (3), the inner cylinder (4) and the shell (5) is PTFE material.

3. The liquid heater according to claim 1, wherein The insulating material wrapped around the electric heating wire (6) is PFA material.

4. The liquid heater according to claim 1, wherein An inner side butt joint portion of the first end cover (1) is provided with an internal thread, the first end of the middle cylinder (3) is provided with an external thread; the first end of the middle cylinder (3) is threadedly connected with the inner side butt joint portion of the first end cover (1).

5. The liquid heater according to claim 1, wherein The inner side butt joint part of the second end cover (2) is provided with an internal thread, and the first end of the inner cylinder (4) is provided with an external thread; the first end of the inner cylinder (4) is threadedly connected to the inner side butt joint part of the second end cover (2).

6. The liquid heater of claim 1, wherein, The inner side one end periphery of the first end cover (1) and the second end cover (2) is respectively provided with an inner retracted butt joint step (103); the two ends of the shell (5) are respectively sleeved with the butt joint steps (103) on the first end cover (1) and the second end cover (2).

7. The liquid heater of claim 1, wherein, The shunt holes (304) are uniformly distributed in the circumferential direction of the interface section (302) of the middle cylinder (3).

8. The liquid heater of claim 7, wherein, A plurality of retaining pieces (7) are uniformly distributed along the axial direction of the inner cylinder (4) on the outer periphery of the inner cylinder (4); each retaining piece (7) is provided with a plurality of fixing holes (701), and the electric heating wire (6) passes through the fixing holes (701) on each retaining piece (7) and is arranged around the outer periphery of the inner cylinder (4); The inner cylinder (4) and the retaining pieces (7) on the outer periphery of the inner cylinder (4) are integrally formed.

9. The liquid heater of claim 1, wherein, A plurality of retaining pieces (7) are uniformly distributed along the axial direction of the middle cylinder (3) on the outer periphery of the middle cylinder (3); each retaining piece (7) is provided with a plurality of fixing holes (701), and the electric heating wire (6) passes through the fixing holes (701) on each retaining piece (7) and is arranged around the outer periphery of the middle cylinder (3); The middle cylinder (3) and the retaining pieces (7) on the outer periphery of the middle cylinder (3) are integrally formed.

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