Gas supply premixing valve

Abstract

The air supply premixing valve comprises a valve body and an air inlet pipe, a cavity is formed in the valve body, an air outlet hole is formed in one end of the valve body, the air inlet pipe is arranged on the valve body, and a certain distance exists between an air outlet of the air inlet pipe and the air outlet hole; an air inlet hole is formed in the valve body, a plugging mechanism is arranged in the valve body, and the plugging mechanism can plug the air inlet hole. The device has the effect of saving energy.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of a gas supply valve, in particular to a gas supply premixing valve. BACKGROUND

[0002] The gas supply valve refers to a valve for controlling the flow of gas, which is used for controlling the supply and stop of gas.

[0003] At present, a gas supply premixing valve comprises a valve body, a cavity is formed in the valve body, and a gas outlet hole is formed in the valve body and communicates with the cavity; an air inlet pipe is arranged in the valve body and located in the cavity. High-speed natural gas is introduced into the air inlet pipe, the natural gas enters the cavity, and then flows out through the gas outlet hole.

[0004] When the natural gas directly flows out of the gas outlet hole for use, the combustion is relatively slow or even cannot be combusted, so that the utilization rate of the natural gas is relatively low, thereby causing waste of energy. CONTENT OF THE INVENTION

[0005] In order to save energy, the application provides a gas supply premixing valve.

[0006] The application provides a gas supply premixing valve, which adopts the following technical scheme:

[0007] The gas supply premixing valve comprises a valve body and an air inlet pipe, a cavity is formed in the valve body, a gas outlet hole is formed in one end of the valve body, the air inlet pipe is arranged on the valve body, and a certain distance exists between the gas outlet of the air inlet pipe and the gas outlet hole; an air inlet hole is formed in the valve body, a plugging mechanism is arranged in the valve body, and the plugging mechanism can plug the air inlet hole.

[0008] Through the above technical scheme, the high-speed natural gas flowing into the air inlet pipe flows out of the gas outlet of the air inlet pipe, and then forms a negative pressure in the cavity of the valve body according to Bernoulli's principle. The negative pressure causes the plugging mechanism initially plugging the air inlet hole to stop plugging the air inlet hole, so that the air outside enters the cavity through the air inlet hole and mixes with the natural gas in the cavity, and then the mixed gas flows out of the gas outlet hole of the valve body. Therefore, the plugging mechanism and the air inlet hole can mix the natural gas and the air together, so as to improve the combustion efficiency and save energy.

[0009] Optionally, the plugging mechanism comprises a plugging block and an elastic piece, the plugging block is slidably arranged in the cavity and can cover the air inlet hole, and the elastic piece is arranged on the valve body and connected with the plugging block.

[0010] By adopting the technical scheme, when the high-speed gas flowing out of the air outlet of the air inlet pipe forms a negative pressure, the blocking block moves towards the air outlet, so that the blocking block no longer blocks the air inlet hole, and the elastic member deforms at this time; when the negative pressure disappears, the elastic member restores the elastic deformation force to drive the blocking block to move, so that the blocking block returns to the initial state of blocking the air inlet hole.

[0011] Optionally, the elastic member is a spring, one end of the spring is sleeved on the air inlet pipe, and the other end of the spring is connected with the cavity side wall and the blocking block.

[0012] By adopting the technical scheme, when the blocking block moves towards the air outlet and no longer blocks the air inlet hole, the spring is compressed, so that when the negative pressure disappears and the pressure of the negative pressure is small, the spring restores the elastic deformation, and the blocking block can return to the state of blocking the air inlet hole under the elastic force of the spring.

[0013] Optionally, the blocking block comprises a sleeve block, a connecting rod and a blocking ring block, the sleeve block is sleeved on the air inlet pipe, the connecting rod is arranged on the sleeve block, and the blocking ring block is arranged on the connecting rod and covers the air outlet; the elastic member is connected with the blocking ring block.

[0014] By adopting the technical scheme, when the negative pressure is formed, the sleeve block slides on the air inlet pipe, the connecting rod on the sliding block drives the blocking ring block to move, so that the blocking ring block no longer blocks the air inlet hole, and the cavity can enter the cavity through the air inlet hole.

[0015] Optionally, a limiting groove in communication with the cavity is arranged in the valve body, the air inlet hole is in communication with the limiting groove, the blocking ring block matches the limiting groove, and the blocking ring block abuts against the side wall of the limiting groove.

[0016] By adopting the technical scheme, the limiting groove can reduce the phenomenon that the blocking ring block moves away from the air outlet under the action of the reset member after blocking the air inlet hole, so that the blocking ring block better blocks the air inlet hole.

[0017] Optionally, the limiting groove is in the shape of a circular truncated cone, and the cross-sectional area of the end of the limiting groove away from the air outlet is smaller than the cross-sectional area of the end of the limiting groove close to the air outlet.

[0018] By adopting the technical scheme, the limiting groove in the shape of a circular truncated cone can better limit the blocking ring block.

[0019] Optionally, a negative pressure forming groove is arranged at the end of the valve body close to the air outlet, and the air outlet of the air inlet pipe is located in the negative pressure forming groove.

[0020] By adopting the technical scheme, the negative pressure forming groove can form negative pressure in the negative pressure forming groove when the high-speed gas flows out from the air outlet of the air inlet pipe.

[0021] Optionally, the valve body is provided with a limiting mechanism connected with the blocking block, the limiting mechanism comprises a limiting block and an adjusting assembly, the limiting block is slidingly arranged on the valve body, and the limiting block abuts against one end of the blocking block close to the air outlet hole; and the adjusting assembly is arranged on the valve body and connected with the limiting block.

[0022] By adopting the technical scheme, when air is not introduced into the valve body through the air inlet hole, the limiting block is driven to move by the adjusting assembly, so that the blocking block abuts against one end close to the air outlet hole, and the blocking block also maintains the state of blocking the air inlet hole under the action of negative pressure.

[0023] Optionally, the adjusting assembly comprises an adjusting shaft, a gear and a rack, the adjusting shaft is rotatably arranged on the valve body, the gear is arranged on the adjusting shaft, and the rack is arranged on the limiting block and engaged with the gear.

[0024] By adopting the technical scheme, when the adjusting shaft is rotated, the gear on the adjusting shaft drives the rack to move, and the rack drives the limiting block to move.

[0025] In summary, the present application has at least one of the following beneficial technical effects:

[0026] 1. The blocking mechanism and the air inlet hole can mix natural gas and air together, thereby improving combustion efficiency and saving energy.

[0027] 2. The limiting groove can better block the air inlet hole by the blocking ring block. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 FIG. 1 is a structural schematic view of a gas supply premix valve in an embodiment of the present application;

[0029] Figure 2 FIG. 3 is a structural schematic view of a limiting groove in an embodiment of the present application;

[0030] Figure 3 FIG. 5 is a structural schematic view of a blocking block in an embodiment of the present application;

[0031] Figure 4 FIG. 7 is a structural schematic view of a limiting mechanism in an embodiment of the present application.

[0032] : 1, valve body; 11, cavity; 12, gas outlet hole; 13, gas inlet hole; 14, limiting groove; 15, negative pressure forming groove; 2, gas inlet pipe; 3, blocking mechanism; 31, blocking block; 311, sleeve block; 312, connecting rod; 313, blocking ring block; 32, elastic member; 4, limiting mechanism; 41, limiting block; 42, adjusting assembly; 421, adjusting shaft; 422, gear; 423, rack. DETAILED DESCRIPTION

[0033] The following will be described in detail with reference to the accompanying drawings. Figures 1-4 The application is further described in detail.

[0034] The application discloses a gas supply premixing valve.

[0035] Reference Figure 1 And Figure 2 A gas supply premixing valve comprises a valve body 1, a cavity 11 is formed in the valve body 1, and a gas outlet hole 12 is formed in one end of the valve body 1; a negative pressure forming groove 15 in communication with the cavity 11 is formed in the end of the valve body 1 close to the gas outlet hole 12, the negative pressure forming groove 15 is in the shape of a circular truncated cone, the cross-sectional area of the end of the negative pressure forming groove 15 close to the gas outlet hole 12 is smaller than that of the end of the negative pressure forming groove 15 away from the gas outlet hole 12; a limiting groove 14 in communication with the cavity 11 is formed in the end of the valve body 1 away from the gas outlet hole 12, the limiting groove 14 is in the shape of a circular truncated cone, the cross-sectional area of the end of the limiting groove 14 away from the gas outlet hole 12 is smaller than that of the end of the limiting groove 14 close to the gas outlet hole 12; and a plurality of gas inlet holes 13 in communication with the limiting groove 14 are formed in the circumferential wall of the end of the valve body 1 away from the gas outlet hole 12.

[0036] The end of the valve body 1 away from the gas outlet hole 12 is connected with a gas inlet pipe 2, the gas inlet port of the gas inlet pipe 2 is located outside the valve body 1, the gas outlet port of the gas inlet pipe 2 is located in the negative pressure forming groove 15, and there is a certain distance between the gas outlet port of the gas inlet pipe 2 and the gas outlet hole 12.

[0037] Reference Figure 2 And Figure 3 The valve body 1 is provided with a blocking mechanism 3, the blocking mechanism 3 comprises a blocking block 31, the blocking block 31 comprises a sleeve block 311 sleeved on the gas inlet pipe 2, the sleeve block 311 is in the shape of a ring, and four connecting rods 312 are uniformly and fixedly connected to the circumferential wall of the sleeve block 311; a blocking ring block 313 matched with the limiting groove 14 is arranged in the limiting groove 14, the ends of the four connecting rods 312 away from the sleeve block 311 are connected with the blocking ring block 313, the blocking ring block 313 is in the shape of a circular truncated cone, and when the blocking ring block 313 is located in the limiting groove 14, the blocking ring block 313 abuts against the side wall of the limiting groove 14 and blocks the gas inlet holes 13.

[0038] The valve body 1 is provided with an elastic member 32, which is a spring in this embodiment, and the spring is sleeved on the air inlet pipe 2, one end of the spring is connected with the side wall of the negative pressure forming groove 15 and the other end is connected with the blocking ring block 313.

[0039] In order to reduce the rotation of the sleeve block 311, a guide block is fixedly connected on the sleeve block 311 in this embodiment, and the air inlet pipe 2 is provided with a guide groove which is slidably connected with the guide block along the length direction of the air inlet pipe 2.

[0040] Reference Figure 2 and Figure 4 In order to limit the blocking ring block 313, a limiting mechanism 4 is arranged on the valve body 1.

[0041] The side wall of the cavity 11 is provided with a sliding groove, the limiting mechanism 4 comprises a limiting block 41 which is slidably connected in the sliding groove, and when the blocking ring block 313 is completely located in the limiting groove 14, the limiting block 41 can abut against one end of the blocking ring block 313 which is close to the air outlet hole 12. The valve body 1 is provided with an adjusting assembly 42, the adjusting assembly 42 comprises an adjusting shaft 421 which is rotatably connected on the valve body 1, and a gear 422 is keyed on the adjusting shaft 421; the limiting block 41 is fixedly connected with a gear rack 423 which is engaged with the gear 422.

[0042] The implementation principle of the gas supply premixing valve in this embodiment is as follows: when the natural gas flows into the valve body 1 through the air inlet pipe 2 at a high speed, the natural gas will flow out of the valve body 1 through the negative pressure forming groove 15 and the air outlet hole 12 in sequence; the high-speed flowing natural gas will form a negative pressure in the negative pressure forming groove 15 according to Bernoulli's principle, so that a negative pressure is formed in the cavity 11, the blocking ring block 313 will move outwardly towards the air outlet hole 12, the spring is compressed, and the air of the normal atmospheric pressure outside will enter into the limiting groove 14 through the air inlet hole 13, and then enter into the negative pressure forming groove 15 through the gap between the adjacent two connecting rods 312 and the cavity 11, the air will be mixed with the natural gas, and finally flows out of the valve body 1 through the air outlet hole 12.

[0043] When the flow rate of the natural gas is low or the negative pressure disappears, the spring will recover the elastic deformation, and under the action of the spring force, the blocking ring block 313 will enter into the limiting groove 14 and abut against the side wall of the limiting groove 14 and realize the blocking of the air inlet hole 13.

[0044] When the air outlet is blocked, the natural gas flowing out of the air outlet hole 12 will enter into the cavity 11, at this time, the spring will also recover the elastic deformation, so that the blocking ring block 313 realizes the blocking of the air inlet hole 13.

[0045] When it is not necessary to mix air into the natural gas, the adjusting shaft 421 is rotated, the adjusting shaft 421 drives the gear 422 to rotate, the gear 422 drives the rack 423 to move, and the rack 423 drives the limiting block 41 to move, so that the limiting block 41 abuts against one end of the blocking ring-shaped block 313 close to the gas outlet hole 12, and the blocking ring-shaped block 313 keeps blocking the gas inlet hole 13.

[0046] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, so: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A gas supply premix valve, comprising a valve body (1) and an air inlet pipe (2), a cavity (11) is formed in the valve body (1), an air outlet hole (12) is formed at one end of the valve body (1), the air inlet pipe (2) is arranged on the valve body (1), and there is a certain distance between the air outlet of the air inlet pipe (2) and the air outlet hole (12); characterized in that, The valve body (1) is provided with an air inlet hole (13), and a plugging mechanism (3) is arranged in the valve body (1) and can plug the air inlet hole (13).

2. A gas supply premix valve according to claim 1, wherein The plugging mechanism (3) comprises a plugging block (31) and an elastic member (32), the plugging block (31) is slidably arranged in the cavity (11) and can cover the air inlet hole (13), and the elastic member (32) is arranged on the valve body (1) and connected with the plugging block (31).

3. A gas supply premix valve according to claim 2, wherein The elastic member (32) is a spring, one end of the spring is sleeved on the air inlet pipe (2), one end of the spring is connected with the side wall of the cavity (11), and the other end is connected with the plugging block (31).

4. The air supply premix valve of claim 2, wherein The plugging block (31) comprises a sleeve block (311), a connecting rod (312) and a plugging annular block (313), the sleeve block (311) is sleeved on the air inlet pipe (2), the connecting rod (312) is arranged on the sleeve block (311), and the plugging annular block (313) is arranged on the connecting rod (312) and can cover the air outlet hole (12); the elastic member (32) is connected with the plugging annular block (313).

5. A gas supply premix valve according to claim 4, wherein The valve body (1) is provided with a limiting groove (14) in communication with the cavity (11), the air inlet hole (13) is in communication with the limiting groove (14), the plugging annular block (313) is matched with the limiting groove (14), and the plugging annular block (313) abuts against the side wall of the limiting groove (14).

6. A gas supply premix valve according to claim 5, wherein The limiting groove (14) is in the shape of a circular truncated cone, and the cross-sectional area of one end of the limiting groove (14) away from the air outlet hole (12) is smaller than that of the other end of the limiting groove (14) close to the air outlet hole (12).

7. The air supply premix valve of claim 1, wherein One end of the valve body (1) close to the air outlet hole (12) is provided with a negative pressure forming groove (15), and the air outlet of the air inlet pipe (2) is located in the negative pressure forming groove (15).

8. The air supply premix valve of claim 2, wherein, The valve body (1) is provided with a limiting mechanism (4) connected with the plugging block (31), the limiting mechanism (4) comprises a limiting block (41) and an adjusting assembly (42), the limiting block (41) is slidably arranged on the valve body (1), and one end of the limiting block (41) abuts against the plugging block (31) close to the air outlet hole (12); the adjusting assembly (42) is arranged on the valve body (1) and connected with the limiting block (41).

9. A gas supply premix valve according to claim 8, wherein The adjusting assembly (42) comprises an adjusting shaft (421), a gear (422) and a rack (423), the adjusting shaft (421) is rotatably arranged on the valve body (1), the gear (422) is arranged on the adjusting shaft (421), and the rack (423) is arranged on the limiting block (41) and engaged with the gear (422).

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