Boiler for natural gas combustion

Abstract

The utility model relates to the technical field of heating boilers, and provides a natural gas combustion boiler which comprises a frame body provided with a gas inlet and a gas outlet. Each heat exchanger is provided with a heat exchange cavity and a medium flowing cavity, the heat exchangers are sequentially arranged on the frame body, the heat exchange cavities form a combustion cavity, ventilation cavities are formed between the adjacent heat exchangers, the ventilation cavities are communicated with the combustion cavity, the combustion cavity is communicated with the air inlet, and the ventilation cavities are communicated with the air outlet; the plurality of heat exchange rods are arranged in the medium flowing cavity; and the plurality of fins are arranged in the ventilation cavity. By means of the technical scheme, the problem that in the prior art, heat exchange between natural gas and media is insufficient after the natural gas is combusted and heated in a boiler is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of heating boiler, specifically, relate to a kind of boiler for natural gas combustion. BACKGROUND

[0002] In the energy supply system of small villa, heating is one of the key links to ensure the comfort of living. Natural gas, as a clean and relatively convenient energy, is often used for boiler heating in villa. The demand for boiler in small villa has its particularity. On the one hand, the space is limited, and there is a high requirement for the size and compactness of the equipment. On the other hand, the residents have high expectations for energy utilization efficiency and heating effect. The traditional natural gas boiler used in small villa often has low heat exchange efficiency due to the limitation of structural design. Not only increases the energy consumption of small villa, but also may affect the living experience of residents due to poor heating effect. SUMMARY

[0003] The utility model provides a kind of boiler for natural gas combustion, solve the problem that natural gas is not fully exchanged with medium after being heated by boiler combustion in relevant technology.

[0004] The technical scheme of the utility model is as follows:

[0005] A kind of boiler for natural gas combustion, comprising:

[0006] Frame body, the frame body has gas inlet and gas outlet;

[0007] Heat exchanger, the heat exchanger has heat exchange cavity and medium flow cavity, the heat exchanger quantity is several, several the heat exchanger is sequentially arranged on the frame body, several the heat exchange cavity forms combustion chamber, adjacent the heat exchanger forms air passage, the air passage is communicated with the combustion chamber, the combustion chamber is communicated with the gas inlet, the air passage is communicated with the gas outlet;

[0008] Heat exchange rod, the heat exchange rod quantity is several, several the heat exchange rod is arranged in the medium flow cavity;

[0009] Fin, the fin quantity is several, several the fin is arranged in the air passage.

[0010] Optionally, the two ends of the heat exchange rod are extended out of the medium flow cavity and located in the air passage.

[0011] Optionally, the medium flow cavity has liquid inlet and liquid outlet, the medium flow cavity is arch-shaped, and the liquid inlet and the liquid outlet are respectively located at the two ends with the largest distance in the medium flow cavity.

[0012] Optionally, the fin is wave-shaped.

[0013] Optionally, several of the liquid inlets are in communication with each other, and several of the liquid outlets are in communication with each other.

[0014] Optionally, the liquid inlets are lower than the liquid outlets.

[0015] Optionally, the utility model further comprises:

[0016] A Venturi tube is arranged on the frame body and is in communication with the air inlet.

[0017] Optionally, the utility model further comprises:

[0018] Locking blocks are used in pairs and in several numbers, the locking blocks used in pairs are arranged on two adjacent heat exchangers respectively, and the locking blocks have dovetail sliding grooves.

[0019] Sliding blocks have dovetail protrusions, the sliding blocks are used in pairs, the two dovetail protrusions are arranged in the two dovetail sliding grooves respectively, after the sliding blocks are moved, one end of the dovetail protrusion enters the other dovetail sliding groove, and the relative position of the adjacent heat exchangers is limited.

[0020] Optionally, the locking blocks further have locking holes, the sliding blocks further have mounting portions, and the utility model further comprises:

[0021] Locking rods are slidably arranged on the mounting portions, after the locking rods are slid, one end of the locking rods extends into the locking holes, and the relative position of the locking blocks and the sliding blocks is limited.

[0022] Optionally, the utility model further comprises:

[0023] First elastic members are connected with the locking rods and the mounting portions respectively at two ends, and the first elastic members are used for providing force for the locking rods to approach the locking blocks.

[0024] The utility model discloses a working principle and beneficial effects are as follows:

[0025] The utility model discloses, in order to solve the problem that natural gas is not sufficient in related art heat exchange with medium after the heating of boiler combustion, design a kind of natural gas combustion boiler. Including frame, heat exchanger, heat exchange pole and fin. Frame is the support structure of entire boiler, its side surface is equipped with gas inlet and gas outlet, is used for the input of natural gas and the discharge of gas after combustion. A plurality of heat exchangers are installed on frame in turn. Every heat exchanger has heat exchange cavity and medium flow cavity inside. A plurality of heat exchange cavities jointly constitute combustion chamber, the space between adjacent heat exchangers is air passage, air passage and combustion chamber are interconnected, combustion chamber is connected with gas inlet, ensure that natural gas can enter combustion, air passage is connected with gas outlet, so that the gas after combustion is discharged. Heat exchange pole is evenly distributed in medium flow cavity, is used to enhance heat exchange efficiency. The number of fin is several, evenly installed in air passage, also help heat exchange.

[0026] The advantage is that this structure design makes natural gas can be fully combusted in combustion chamber, through the setting of multiple heat exchangers, increase heat exchange area. The design that air passage and combustion chamber are communicated, ensure that the gas after combustion can be smoothly discharged, and also can utilize fin and heat exchanger to carry out heat exchange in the process of discharging, improve energy utilization. Heat exchange pole is in medium flow cavity, can make the medium that flows through fully absorb heat, further improve heat exchange effect. BRIEF DESCRIPTION OF DRAWINGS

[0027] The above-mentioned characteristics, technical features, advantages and implementation modes of the utility model will be further described in the following clear and understandable manner, combined with the preferred embodiments and the drawings.

[0028] Figure 1 It is overall structure schematic diagram of the utility model;

[0029] Figure 2 It is heat exchanger structure schematic diagram of the utility model;

[0030] Figure 3 It is heat exchanger internal structure schematic diagram of the utility model;

[0031] Figure 4 It is overall structure internal schematic diagram of the utility model;

[0032] Figure 5 It is the utility model Figure 1 It is the utility model A place enlarged view;

[0033] Figure 6 It is part structure schematic diagram of the utility model.

[0034] In the figure: 1, frame body, 101, air inlet, 102, air outlet, 2, heat exchanger, 201, heat exchange cavity, 202, medium flow cavity, 3, combustion cavity, 4, ventilation cavity, 5, heat exchange rod, 6, fin, 203, liquid inlet, 204, liquid outlet, 7, Venturi tube, 8, locking block, 801, dovetail sliding groove, 9, sliding block, 901, dovetail protrusion, 802, locking hole, 902, mounting portion, 10, locking rod, 11, first elastic member. DETAILED DESCRIPTION

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, specific embodiments of the present application will be described below with reference to the drawings. Obviously, the drawings described below are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor, and other embodiments can also be obtained.

[0036] In order to make the drawing simple, only the parts related to the present application are shown in the drawings, which do not represent the actual structure of the product. In addition, in order to make the drawing simple and easy to understand, in some drawings, only one of the components with the same structure or function is shown, or only one of them is marked. In this paper, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0037] In this paper, it should be noted that, unless otherwise specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, in the description of the present application, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] Reference Figures 1-6The utility model discloses a first embodiment, propose a kind of boiler for natural gas combustion, including frame body 1, frame body 1 has gas inlet 101 and gas outlet 102;Heat exchanger 2 has heat exchange cavity 201 and medium flow cavity 202, heat exchanger 2 quantity is several, several heat exchangers 2 are sequentially arranged on frame body 1, several heat exchange cavities 201 form combustion chamber 3, form air passage 4 between adjacent heat exchangers 2, air passage 4 is communicated with combustion chamber 3, combustion chamber 3 is communicated gas inlet 101, air passage 4 is communicated gas outlet 102;Heat exchange rod 5 quantity is several, several heat exchange rods 5 are arranged in medium flow cavity 202;Fin 6 quantity is several, several fins 6 are arranged in air passage 4.

[0040] In the embodiment, in order to solve the problem of insufficient heat exchange between natural gas and medium after natural gas is burned and heated in the related art, a boiler for natural gas combustion is designed. The boiler comprises a frame body 1, heat exchangers 2, heat exchange rods 5 and fins 6. The frame body 1 is a support structure of the entire boiler, and a gas inlet 101 and a gas outlet 102 are formed in the side surface of the frame body 1 for input of natural gas and discharge of gas after combustion. The heat exchangers 2 are seven in number (the number is only an example) and are sequentially installed on the frame body 1. Each heat exchanger 2 has a heat exchange cavity 201 and a medium flow cavity 202 inside. The seven heat exchange cavities 201 jointly form a combustion chamber 3, and the space between adjacent heat exchangers 2 is an air passage 4, which is in communication with the combustion chamber 3. The combustion chamber 3 is in communication with the gas inlet 101 to ensure that natural gas can enter the combustion chamber, and the air passage 4 is in communication with the gas outlet 102 to discharge the gas after combustion. The heat exchange rods 5 are uniformly distributed in the medium flow cavity 202 to enhance the heat exchange efficiency. The fins 6 are in a number and are uniformly installed in the air passage 4, which also helps heat exchange.

[0041] The structure design enables natural gas to be fully combusted in the combustion chamber 3, the multiple heat exchangers 2 increase the heat exchange area, the air passage 4 is in communication with the combustion chamber 3 to ensure that the gas after combustion can be smoothly discharged, and the fins 6 and the heat exchangers 2 can be used for heat exchange during the discharge process to improve the energy utilization rate. The heat exchange rods 5 in the medium flow cavity 202 can make the medium flowing through sufficiently absorb heat to further improve the heat exchange effect.

[0042] Further, the two ends of the heat exchange rods 5 extend out of the medium flow cavity 202 and are located in the air passage 4.

[0043] In the embodiment, the length of each heat exchange rod 5 is designed to be slightly longer than the length of the medium flow cavity 202, so that the two ends of the heat exchange rod 5 extend out of the medium flow cavity 202 and are located in the air passage 4 to increase the contact area with the gas in the air passage 4.

[0044] The heat exchange rod 5 extends into the ventilation cavity 4, and the heat exchange rod 5 can utilize the heat of the gas in the ventilation cavity 4, thereby further increasing the heat exchange path and efficiency.

[0045] Further, the medium flow cavity 202 has a liquid inlet 203 and a liquid outlet 204. The medium flow cavity 202 is in the shape of an arch, and the liquid inlet 203 and the liquid outlet 204 are respectively located at the two ends of the medium flow cavity 202 that are farthest apart.

[0046] In this embodiment, the medium flow cavity 202 of the heat exchanger 2 is in the shape of an arch, and the liquid inlet 203 and the liquid outlet 204 are respectively located at the two ends of the medium flow cavity 202 that are farthest apart. The liquid inlet 203 is connected to an external liquid supply system through a pipeline, and the liquid outlet 204 is connected to a heat utilization device or other subsequent processing device.

[0047] The arch-shaped medium flow cavity 202 design greatly increases the flow path of the liquid in the medium flow cavity 202, so that the liquid can fully absorb heat and improve the heat exchange efficiency. The liquid inlet 203 and the liquid outlet 204 are located at the two ends that are farthest apart, so that the liquid stays in the medium flow cavity 202 for a longer time and can better exchange heat with the heat exchanger 2.

[0048] Further, the fins 6 are in a wave shape.

[0049] In this embodiment, the fins 6 are in a wave shape. The fins 6 are made of a metal material that is resistant to high temperature and has good heat conduction performance, such as copper alloy. When installed, the wave crests and wave troughs of the fins 6 are at an angle, for example, 45 degrees, to the flow direction of the gas in the ventilation cavity 4, so as to increase the contact time and area of the gas and the fins 6.

[0050] The wave-shaped fins 6 design greatly increases the contact area with the gas compared to traditional flat fins 6, so that the gas can more fully exchange heat with the fins 6 when passing through the ventilation cavity 4.

[0051] Further, the plurality of liquid inlets 203 are connected to each other, and the plurality of liquid outlets 204 are connected to each other.

[0052] In this embodiment, all the liquid inlets 203 are connected to each other through pipelines, and all the liquid outlets 204 are also connected to each other. A sealing glue and a flange connection method with good sealing performance are used at the pipeline connection positions to ensure that there is no leakage at the connection positions.

[0053] The design that the plurality of liquid inlets 203 are connected to each other and the plurality of liquid outlets 204 are connected to each other enables the liquid to be evenly distributed and collected among the heat exchangers 2, so that the heat exchange process in each heat exchanger 2 can be stably performed, and the problem of reduced heat exchange efficiency caused by uneven local liquid flow is avoided.

[0054] Further, the liquid inlet 203 is lower than the liquid outlet 204.

[0055] In this embodiment, during the installation of the boiler, the liquid inlet 203 is arranged at a lower position relative to the liquid outlet 204.

[0056] The advantage is that the design of the liquid inlet 203 being lower than the liquid outlet 204 utilizes the gravitational potential energy of the liquid, and this natural flow mode also makes the liquid flow more smoothly in the medium flow cavity 202, which is conducive to the stable operation of heat exchange and improves the heat exchange efficiency.

[0057] Further, a Venturi tube 7 is arranged on the frame 1 and connected to the air inlet 101.

[0058] In this embodiment, the Venturi tube 7 is installed at the air inlet 101 of the frame 1, and the throat diameter of the Venturi tube 7 is 0.6 times the diameter of the air inlet 101. Smooth transition connections are adopted at the inlet and outlet of the Venturi tube 7 to reduce the resistance of gas flow.

[0059] The advantage is that the installation of the Venturi tube 7 can accelerate the natural gas before entering the combustion chamber 3, and make the natural gas mix better with the air, thereby improving the combustion efficiency. The smooth transition connections at the inlet and outlet of the Venturi tube 7 reduce the resistance of gas flow, ensure the smooth flow of natural gas, and reduce energy loss.

[0060] Further, locking blocks 8 are arranged, and the locking blocks 8 are used in pairs and in several numbers. The locking blocks 8 used in pairs are arranged on two adjacent heat exchangers 2 respectively, and the locking blocks 8 have dovetail sliding grooves 801. The sliding blocks 9 have dovetail protrusions 901, and the sliding blocks 9 are used in pairs. The two dovetail protrusions 901 are arranged in the two dovetail sliding grooves 801. After the sliding blocks 9 are moved, one end of the dovetail protrusions 901 enters the other dovetail sliding groove 801, which is used to limit the relative position of the adjacent heat exchangers 2.

[0061] In this embodiment, pairs of locking blocks 8 are arranged on two adjacent heat exchangers 2 respectively, and each locking block 8 has a dovetail sliding groove 801. The sliding blocks 9 are used in pairs, and the dovetail protrusions 901 of the sliding blocks 9 are matched with the dovetail sliding grooves 801. The sliding blocks 9 can smoothly slide in the dovetail sliding grooves 801. During installation, the dovetail protrusions 901 of the sliding blocks 9 are respectively inserted into the dovetail sliding grooves 801 of the two adjacent locking blocks 8, and then the sliding blocks 9 are slid in one direction, so that one end of the dovetail protrusions 901 enters the other dovetail sliding groove 801, thereby limiting the relative position of the adjacent heat exchangers 2.

[0062] The advantage is that the connecting mode of the locking block 8 and the sliding block 9 can conveniently and quickly realize the positioning and fixing between the adjacent heat exchangers 2, and ensure the accuracy and stability of the installation of the heat exchanger 2 on the rack body 1. The design of the dovetail sliding groove 801 and the dovetail protrusion 901 makes the connection firm, can withstand the vibration and thermal stress in the operation process of the boiler, prevents the displacement of the heat exchanger 2, and thus ensures the normal operation of the boiler.

[0063] Further, the locking block 8 also has a plurality of locking holes 802, and the sliding block 9 also has a mounting portion 902, and further comprising:

[0064] The locking rod 10 is slidably arranged on the mounting portion 902, and after the sliding of the locking rod 10, one end of the locking rod 10 extends into the locking hole 802, and is used for limiting the relative position of the locking block 8 and the sliding block 9.

[0065] In the embodiment, the mounting portion 902 is arranged on the sliding block 9, and the locking rod 10 is slidably arranged on the mounting portion 902. The locking block 8 has a plurality of locking holes 802. One end of the locking rod 10 is designed as a tapered shape, which is convenient for insertion into the locking hole 802. During installation, after the dovetail protrusion 901 of the sliding block 9 enters the appropriate position, the locking rod 10 is slid towards the locking block 8, so that the tapered end of the locking rod 10 is inserted into one of the locking holes 802, thereby limiting the relative position of the locking block 8 and the sliding block 9.

[0066] The advantage is that the cooperation of the locking rod 10 and the locking hole 802 further enhances the firmness of the connection between the sliding block 9 and the locking block 8, prevents the loosening of the sliding block 9 due to vibration and other reasons during the operation of the boiler, and ensures the stability of the position between the adjacent heat exchangers 2.

[0067] Further, the first elastic member 11 is connected between the locking rod 10 and the mounting portion 902, and is used for providing the force of the locking rod 10 close to the locking block 8.

[0068] In the embodiment, the first elastic member 11 is connected between the locking rod 10 and the mounting portion 902, and the first elastic member 11 is selected as a spring. The elastic coefficient of the spring is selected according to the weight of the locking rod 10 and the required elastic force. One end of the spring is fixed on the mounting portion 902, and the other end is fixed on the locking rod 10. When the locking rod 10 is not subjected to external force, the spring is in a natural state. When the locking rod 10 is pulled out, the spring is stretched.

[0069] The advantage is that the existence of the first elastic member 11 provides a force for the locking rod 10 close to the locking block 8, so that the locking rod 10 can always keep the state of being inserted into the locking hole 802 without external force interference, further improving the reliability of the locking. When it is needed to pull out the locking rod 10, the elastic force of the spring needs to be overcome, and this design can prevent the locking rod 10 from easily separating from the locking hole 802 due to accidental vibration and the like, thereby ensuring the stability of the entire connecting structure.

[0070] It should be noted that the above 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 preferred 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 they should be covered in the scope of the claims of the present application.

Claims

1. A boiler for burning natural gas, characterized in that, include: The frame (1) has an air inlet (101) and an air outlet (102). A heat exchanger (2) has a heat exchange chamber (201) and a medium flow chamber (202). There are several heat exchangers (2). Several heat exchangers (2) are arranged sequentially on the frame (1). Several heat exchange chambers (201) form a combustion chamber (3). A ventilation chamber (4) is formed between adjacent heat exchangers (2). The ventilation chamber (4) is connected to the combustion chamber (3). The combustion chamber (3) is connected to the air inlet (101). The ventilation chamber (4) is connected to the air outlet (102). A heat exchange rod (5), the number of which is several, and several of the heat exchange rods (5) are arranged in the medium flow cavity (202); Fins (6), a number of fins (6), and a number of fins (6) are disposed in the ventilation cavity (4).

2. A boiler for burning natural gas according to claim 1, characterized in that Several heat exchange rods (5) extend from both ends of the medium flow cavity (202) and are located inside the ventilation cavity (4).

3. A boiler for burning natural gas according to claim 1, characterized in that, The medium flow cavity (202) has an inlet (203) and an outlet (204). The medium flow cavity (202) is bow-shaped. The inlet (203) and the outlet (204) are located at the two ends of the medium flow cavity (202) with the furthest distance between them.

4. A boiler for burning natural gas according to claim 1, characterized in that, The fins (6) are wavy.

5. A boiler for burning natural gas according to claim 3, characterized in that, The inlets (203) are interconnected, and the outlets (204) are interconnected.

6. A boiler for burning natural gas according to claim 3, characterized in that, The inlet (203) is lower than the outlet (204).

7. A boiler for burning natural gas according to claim 1, characterized in that, Also includes: Venturi tube (7), which is installed on the frame (1) and connected to the air inlet (101).

8. A boiler for burning natural gas according to claim 1, characterized in that, Also includes: Locking blocks (8), the locking blocks (8) are used in pairs and there are several of them. The locking blocks (8) used in pairs are respectively set on two adjacent heat exchangers (2). The locking blocks (8) have dovetail grooves (801). The slider (9) has a dovetail protrusion (901). The sliders (9) are used in pairs. The two dovetail protrusions (901) are respectively arranged in the two dovetail grooves (801). After the slider (9) moves, one end of the dovetail protrusion (901) enters the other dovetail groove (801) to limit the relative position of the adjacent heat exchangers (2).

9. A boiler for burning natural gas according to claim 8, characterized in that The locking block (8) also has several locking holes (802), and the slider (9) also has a mounting part (902), and further includes: A locking rod (10) is slidably disposed on the mounting part (902). After the locking rod (10) slides, one end extends into the locking hole (802) to limit the relative position of the locking block (8) and the slider (9).

10. A boiler for burning natural gas according to claim 9, characterized in that, Also includes: The first elastic element (11) has two ends connected to the locking rod (10) and the mounting part (902) respectively, and is used to provide the locking rod (10) with force close to the locking block (8).

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