CN111121042A - Injection pipe for gas stove - Google Patents

Abstract

The invention relates to an injection pipe for a gas stove, which comprises a gas inlet end and at least two injectors arranged corresponding to the gas inlet end, and is characterized in that: the invention has the advantages that the guide vanes are positioned above the respective ejectors, so that when two high-speed airflows positioned above the ejectors are converged, because the guide vanes have obvious momentum loss, the airflow speed of the mixed gas is rapidly reduced, and the airflow below the guide vanes does not pass through the guide vanes at the moment, the speed change is not large, the upper and lower airflows generate speed difference, so that the upper and lower airflows start to be disturbed, and the gas and the primary air are further mixed.

Description

Injection pipe for gas stove

Technical Field

The invention relates to the field of gas cookers, in particular to an injection pipe.

Background

The core for improving the energy efficiency of the atmospheric burner is to improve the primary air coefficient and enhance the injection capacity. How does the first order coefficient of the atmospheric burner increase? The technical staff has done multiple improvement to drawing the structure, the setting of penetrating the pipe, has disclosed an ejector in "gas utensil combustor furnace end ejector" as the chinese utility model of authorized bulletin number CN202392805U, including outer loop nozzle, inner ring nozzle, air door air register board, air door fixed plate, air door spring and furnace end, air door air register board, air door fixed plate and air door spring install respectively on outer loop nozzle and inner ring nozzle, outer loop nozzle and inner ring nozzle are connected its characterized in that with the furnace end: and air holes are formed in the circumferential surface of the tail part of the rear end of the furnace end ejector. Although the utility model discloses a set up the air hole at ejector rear end tail and can increase air volume to a certain extent, nevertheless because the air hole air inlet orbit is in on mutually perpendicular's the plane with the injection orbit of the nozzle of ejector, so the air can disturb the injection of nozzle to the gas when the air hole gets into from the air hole and draws the ejector pipe, and the ability that this air hole increases the air simultaneously is also limited.

The traditional atmospheric burner generally adopts a single-nozzle injection pipe, the injection coefficient of the single nozzle is only about 0.45-0.65 generally, and the flame is uneven in length and weak. In order to increase the ejection capacity of the ejection pipe, the burner with the multi-nozzle ejection pipe appears in the market at present, but because the cross sections of the bell mouth and the roar mouth of the ejection pipe are also traditional circular, the ejection initial stage of the multi-nozzle ejection pipe can interfere with each other to influence the ejection efficiency, and after fuel gas enters the ejection pipe through ejection, the fuel gas cannot be fully mixed with air entering the ejection pipe, so that the primary air coefficient is influenced, and the combustion efficiency of the burner is further influenced. For this reason, the applicant of the present invention discloses an ejector pipe as a chinese patent No. zl201310122553.x (with an issued publication No. CN103234201B), in which a cross section of a cavity surrounded by a bell mouth of the ejector pipe is formed by intersecting a plurality of circles or ellipses similar to circles, centers of the circles or ellipses are located on the same first circle and are uniformly distributed relative to the center of the first circle, nozzles adapted to the ejector pipe are disposed at the centers of the circles or ellipses, and the number of the nozzles is equal to the number of the circles or ellipses, and the number of the nozzles adapted to the ejector pipe is plural, so that compared with a single-nozzle ejector pipe, the ejector capacity of the ejector pipe can be enhanced, if the two nozzles adapted to the ejector pipe are inclined to each other by a certain angle, high-speed gas ejected from the two nozzles collide and mix, so that the injected air and gas are mixed more sufficiently, thereby achieving the purposes of higher thermal efficiency and lower CO discharge, however, the inclination angle of the nozzle required by the structure can not be ensured in actual processing, and in actual processing, the central holes of the two nozzles are in a parallel state, so that the mixing effect is weakened, the high-efficiency mixing represented by the double jet flow is not achieved, and the expected effect is not achieved in the aspect of performance improvement.

Disclosure of Invention

The invention aims to solve the technical problem of providing the injection pipe for the gas stove, which has strong injection capacity and good gas mixing effect, aiming at the current technical situation.

The technical scheme adopted by the invention for solving the technical problems is as follows: this draw and penetrate pipe, including income gas port end and with go into the ejector that the gas port end corresponds the setting, the ejector has at least two, its characterized in that: the ejector is characterized in that the ejector is provided with at least two parallel flow deflectors corresponding to two adjacent ejectors, the gas inlet end of the ejector pipe is internally provided with at least two parallel flow deflectors which are vertical to the plane where the axis of the ejector is located, and the two flow deflectors are located between the plane and the peripheral wall of the corresponding ejector pipe.

Preferably, each of the guide vanes is located at a position downstream of the corresponding ejector in the air flow direction. When two bundles of high-speed air flows above the ejector are intersected, because of obvious momentum loss of the flow deflector, the air flow speed of mixed gas is rapidly reduced, at the moment, the air flow below the ejector does not pass through the flow guide piece, the speed change of the air flow is not large, and therefore the speed difference is generated between the upper layer of air flow and the lower layer of air flow, the upper layer of air flow and the lower layer of air flow start to be disturbed, the gas and primary air are further mixed, the full combustion of the gas is facilitated, the heat efficiency can be improved, and the emission of waste gas such as CO in.

Further, each flow guide is located at a position downstream of the corresponding injector and is arranged at a certain interval d1, and the interval d1 satisfies: d2 is more than or equal to 1.2mm and less than or equal to 2.8 mm. Too large or too small a distance d1 is not favorable for disturbance of air flow in the upper and lower layers of the flow guide member.

Further, in order to reach the flow guide member, so that the air flows of the upper layer and the lower layer generate an air flow difference to generate disturbance, the ejector is provided with two injectors, namely a first ejector and a second ejector, the flow guide member is a part of the flow guide member, the flow guide member comprises a first flow guide member positioned above the first ejector and a second flow guide member positioned above the second ejector, and the relationship between the distance D between the first flow guide member and the second flow guide member and the center distance D2 between the first ejector and the second ejector is as follows: d is not less than D2+10 and is not less than D2-10.

The first flow guide part and the second flow guide part can be arranged in parallel or at a certain angle, and the included angle α between the first flow guide part and the second flow guide part is not less than 0 and not more than α and not more than 30 degrees.

In order to prevent backfire, the anti-backfire device also comprises an anti-backfire cover arranged on the end face of the pipe orifice corresponding to the gas inlet end of the injection pipe, and the cross section of the anti-backfire cover is in an inverted U shape.

In order to better realize the connection of the tempering-proof cover and the flow guide piece, the U-shaped tempering-proof cover comprises a horizontal part, the flow guide piece further comprises a connecting rib which is connected with the root part of the first flow guide piece and the root part of the second flow guide piece, and the connecting rib is connected on the horizontal part.

Further, a distance d3 between a lowest end of the free end of the first flow guide and the central axis of the first injector is satisfied: d3 is more than or equal to 0 and less than or equal to 13 mm. Too large distance d3 is not favorable for the high-speed airflow at both sides of the flow guide member to start to get closer to the middle, and too small flow guide member does not play a corresponding flow guide role.

Further, a distance d4 between a lowest end of the free end of the second flow guide and the central axis of the second injector is satisfied: d4 is more than or equal to 0 and less than or equal to 13 mm. Too large distance d4 is not favorable for the high-speed airflow at both sides of the flow guide member to start to get closer to the middle, and too small flow guide member does not play a corresponding flow guide role.

The structure of water conservancy diversion spare can have the multiple to simple structure's angle is considered, first water conservancy diversion spare and second water conservancy diversion spare all are platelike, the horizontal width of first water conservancy diversion spare and second water conservancy diversion spare is 3 ~ 12 mm. The closer the guide plate is to the ejector, the more sensitive the performance is, the narrower the width of the guide piece in a certain range, the better the effect is, and the more sensitive the performance is.

Compared with the prior art, the invention has the advantages that the flow deflectors are positioned above the corresponding ejectors, so that when two beams of high-speed airflow positioned above the ejectors are converged, the airflow speed of the mixed gas is rapidly reduced due to obvious momentum loss of the flow deflectors, and the airflow below the flow deflectors does not pass through the flow guide piece at the moment, so that the speed change is not large, and the speed difference is generated between the upper layer of airflow and the lower layer of airflow, so that the upper layer of airflow and the lower layer of airflow start to be disturbed, the gas and primary air are further mixed, the full combustion of the gas is facilitated, the heat efficiency is improved, and the emission of waste gas such as CO in flue gas is.

Drawings

FIG. 1 is a schematic structural diagram of an ejector adapted to an air inlet end of an injection pipe in embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a schematic structural view of a flashback-preventing cover in embodiment 1 of the present invention;

FIG. 4 is a sectional view of an angle in the entirety of an ejector pipe in example 1 of the present invention;

fig. 5 is an opposite sectional view of fig. 4.

FIG. 6 is a schematic view showing the arrangement of the ejectors and the flow guide members in example 2 of the present invention;

fig. 7 is a schematic distribution diagram of the injectors and the guide members according to embodiment 3 of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Example 1

As shown in FIGS. 1 to 5, this embodiment is the best embodiment of the present invention. The injection pipe 1 of this embodiment is including the ejector that has gas inlet end 11 and corresponds the setting with gas inlet end 11, and the ejector has at least two, and is corresponding with two adjacent ejectors in the ejector, is provided with two parallel water conservancy diversion pieces at least in injecting the gas inlet end 11 of injection pipe 1, and this two water conservancy diversion pieces are perpendicular with the axis place plane of ejector to be located between this plane and the perisporium that corresponds injection pipe 1.

Preferably, each flow deflector is located at the downstream position of the corresponding ejector along the airflow direction, and the flow guide member is located above the ejector and at the downstream position of the corresponding ejector, so that when two high-speed airflows located above the ejector meet, because the flow guide member has obvious momentum loss, the airflow speed of the mixed gas is rapidly reduced, and the airflow below the flow guide member does not pass through the flow deflector at the moment, the speed change is not large, and therefore, the upper and lower airflows generate speed difference, so that the upper and lower airflows start to be disturbed, the gas and the primary air are further mixed, the full combustion of the gas is facilitated, the thermal efficiency can be improved, and the emission of waste gases such as CO in the flue gas is reduced.

Furthermore, each guide vane is positioned at the downstream position of the corresponding ejector and is arranged at a certain interval D1, the interval D1 meets the condition that D2 is not more than 1.2mm and not more than 2.8mm, the distance D1 is too large or too small, which is not beneficial to the disturbance of the air flows of the upper layer and the lower layer of the guide vane, and in order to achieve the purpose that the air flows of the upper layer and the lower layer generate air flow difference to generate disturbance, the ejector is provided with two ejectors which are respectively a first ejector 2 and a second ejector 3, the guide vanes are parts of the guide vanes, the guide vanes comprise a first guide member 41 positioned on the first ejector 2 and a second guide member 42 positioned on the second ejector 3, the distance D between the first guide member 41 and the second guide member 42 and the central distance D2 between the first ejector 2 and the second ejector 3 is D2-10 and not more than D2+10, wherein the first guide member 41 and the second guide member 42 can be arranged in parallel with a certain angle, and the first guide member 41 and the second guide member 42 can meet the included angle 3625.

Finally, in order to prevent the tempering, still including setting up the fire-proof cover 5 on the mouth of pipe terminal surface 111 that the gas inlet end 11 of drawing tub 1 corresponds, the cross-section of fire-proof cover 5 is the U type of inversion, in order to realize being connected of fire-proof cover 5 and water conservancy diversion spare 4 better, U type fire-proof cover 5 is including horizontal part 51, water conservancy diversion spare 4 is still including the splice bar 43 of connecting first water conservancy diversion spare 41 root and second water conservancy diversion spare 42 root, splice bar 43 then connects on horizontal part 51, wherein the distance d3 between the minimum of the free end of first water conservancy diversion spare 41 of water conservancy diversion spare and the central axis of first sprayer 2 satisfies: d3 is more than or equal to 0 and less than or equal to 13 mm. Too large a distance d3 is not favorable for the high-speed airflow on both sides of the guiding element to start to get closer to the middle, and too small a guiding element does not play a role in guiding the airflow, and similarly, the distance d4 between the lowest end of the free end of the second guiding element 42 and the central axis of the second injector 3 is satisfied: d4 is more than or equal to 0 and less than or equal to 13 mm. Too large distance d4 is not favorable for the high-speed airflow at both sides of the flow guide member to start to get closer to the middle, and too small flow guide member does not play a corresponding flow guide role. The structure of the flow guide member can be various, and in view of simple structure, the first flow guide member 41 and the second flow guide member 42 are both plate-shaped, and the horizontal width of the first flow guide member 41 and the second flow guide member 42 is 3-12 mm. The guide plate is closer to the ejector more, the performance is more sensitive, the effect is better more narrow more the guide part is in certain extent width, the performance is more sensitive more, because the guide part is located the ejector top, thereby when two bundles of high-speed air flows that are located the ejector top intersect, because the guide part has obvious momentum loss, the air current speed of mist reduces rapidly, and the air current of its below does not pass through the guide part this moment, its speed variation is little, therefore upper and lower two-layer air current produces the velocity difference, thereby make upper and lower two-layer air current begin the disturbance, make the further mixing of gas and primary air, be favorable to the abundant burning of gas, can improve the thermal efficiency, reduce the emission of waste gases such as CO in the flue gas.

Example 2

The structure is basically the same as that of the embodiment 1, and the difference is that: the injection pipe 1 of this embodiment includes the gas inlet end 11 and the three ejectors that correspond the setting with the gas inlet end 11, and three ejectors are first ejector 2 ', first ejector 3' and third ejector 33 'respectively promptly, and first ejector 2', first ejector 3 'and third ejector 33' are the triangle-shaped, and have water conservancy diversion spare 4 between two adjacent ejectors, as shown in fig. 6.

Example 3

The structure is basically the same as that of the embodiment 1, and the difference is that: the injection pipe 1 of this embodiment includes an air inlet end 11 and five ejectors corresponding to the air inlet end 11, and the five ejectors are respectively a first ejector 2 ", a first ejector 3", a third ejector 33 ", a fourth ejector 34 ' and a fifth ejector 35 ', the first ejector 2", the first ejector 3 ", the third ejector 33 ', the fourth ejector 34 ' and the fifth ejector 35 ' are in a quincunx shape, and a flow guide member 4 is provided between every two adjacent ejectors, as shown in fig. 7.

Claims (10)

1. The utility model provides an draw and penetrate pipe for gas-cooker, including gas inlet end (11) and with go into gas inlet end (11) ejector (2, 3) that correspond the setting, ejector (2, 3) have at least two, its characterized in that: the ejector is characterized in that the ejector corresponds to two adjacent ejectors (2, 3) in the ejectors (2, 3), at least two parallel flow deflectors are arranged in the gas inlet end (11) of the ejector pipe (1), and the two flow deflectors are perpendicular to the plane where the axes of the ejectors (2, 3) are located and are positioned between the plane and the peripheral wall of the corresponding ejector pipe (1).

2. The ejector tube for a gas range according to claim 1, wherein: each of the flow guides (41, 42) is located downstream of the corresponding ejector (2, 3) in the direction of the gas flow.

3. The ejector tube for a gas range according to claim 2, wherein: each guide vane is located at a position downstream of the corresponding ejector (2, 3) and is disposed at an interval d1, the interval d1 satisfying: d2 is more than or equal to 1.2mm and less than or equal to 2.8 mm.

4. The ejector tube for a gas range according to claim 3, wherein: the injectors (2, 3) have two injectors (2, 3), a first injector (2) and a second injector (3), the guide vane being part of a guide (41, 42) comprising a first guide (41) located above the first injector (2) and a second guide (42) located above the second injector (3), the relationship between the distance D between the first guide (41) and the second guide (42) and the center distance D2 between the first injector (2) and the second injector (3) being: d is not less than D2+10 and is not less than D2-10.

5. The ejector tube for the gas stove according to claim 4, wherein an included angle α between the first flow guide member (41) and the second flow guide member (42) is 0- α -30 °.

6. The ejector tube for the gas stove according to any one of claims 3 to 5, characterized in that: the injection pipe is characterized by further comprising a tempering preventing cover (5) arranged on a pipe orifice end face (111) corresponding to the air inlet end (11) of the injection pipe (1), and the section of the tempering preventing cover (5) is in an inverted U shape.

7. The ejector tube for a gas range according to claim 6, wherein: the U-shaped tempering-proof cover (5) comprises a horizontal part (51), the flow guide pieces (41 and 42) further comprise connecting ribs (43) for connecting the root parts of the first flow guide piece (41) and the second flow guide piece (42), and the connecting ribs (43) are connected to the horizontal part (51).

8. The ejector tube for a gas range according to claim 7, wherein: the distance d3 between the lowest end of the free end of the first flow guide element (41) and the central axis of the first injector (2) is such that: d3 is more than or equal to 0 and less than or equal to 13 mm.

9. The ejector tube for a gas range according to claim 7 or 8, wherein: the distance d4 between the lowest end of the free end of the second flow guide element (42) and the central axis of the second injector (3) is such that: d4 is more than or equal to 0 and less than or equal to 13 mm.

10. The ejector tube for a gas range according to claim 9, wherein: the first flow guide piece (41) and the second flow guide piece (42) are both plate-shaped, and the horizontal width of the first flow guide piece (41) and the horizontal width of the second flow guide piece (42) are 3-12 mm.

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