Gas decompression flowmeter set

Abstract

The utility model provides a gas decompression flowmeter set which comprises a flowmeter and a gas storage decompression cushion valve, a gas hole is communicated with a gas channel and a high-pressure chamber, and the gas hole is used as a gas outlet of the flowmeter and a gas inlet of the gas storage decompression cushion valve at the same time. The connecting elbow is a three-way elbow, a gas regulator is arranged at a port at the upper end of the connecting elbow, a pagoda head structure is arranged at the port, far away from the gas regulator, of the connecting elbow, a limiting nut is arranged at the lower end of the gas storage pressure reduction cushion valve, and an adjusting knob is in threaded connection with the limiting nut. The utility model has the advantages that the adjusted actual output flow is consistent with the scale of the flowmeter, and the gas flow can be locked, so that field welders cannot adjust the gas flow at will, the forming quality of welded products is improved, and the cost of protective gas is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of flow meters, and particularly relates to a gas pressure-reducing flow meter group. Background Art

[0002] Based on the patented technology with the patent number ZL201921591928.1, our company has continuously optimized and improved the patented product. Successively, according to patents ZL202922921143.X, ZL202221915125.3, ZL202221471355.5, ZL202221535029.6, ZL2022212169181.3, ZL202221746257.8, ZL2021915125.3, the product has been continuously improved and optimized. Now it is found that the original product has a defect, that is, when the pressure during actual customer use is not at the flow meter scale pressure reference of 0.35 MPa designed for the original product, when the float of the flow meter aligns with the scale line, the actual flow rate and the scale where the float is located are seriously inconsistent. Summary of the Utility Model

[0003] Aiming at the above deficiencies in the prior art, the utility model provides a gas pressure-reducing flow meter group, and its purpose is to solve problems such as the serious inconsistency between the actual flow rate and the scale where the float of the flow meter is located when the float aligns with the scale line.

[0004] In order to achieve the above utility model purpose, the technical scheme adopted by the utility model is as follows:

[0005] A gas pressure-reducing flow meter group includes a flow meter and a gas storage pressure-reducing buffer valve. The flow meter is provided with an air inlet, an inner pipe, and an outer pipe. An air passage is provided between the inner pipe and the outer pipe. The gas storage pressure-reducing buffer valve is provided with a high-pressure chamber and a low-pressure chamber. A connecting elbow is provided on the gas storage pressure-reducing buffer valve. A hollow screw column is integrally provided at the bottom of the flow meter, and the hollow screw column is thread-sealedly connected to the gas storage pressure-reducing buffer valve; an air hole is provided in the hollow screw column, and an inclined channel communicating the air passage and the air hole is provided on the flow meter; the air hole communicates the air passage and the high-pressure chamber, and the air hole is used as the air outlet hole of the flow meter and at the same time as the air inlet hole of the gas storage pressure-reducing buffer valve. The connecting elbow is a three-way elbow, and a gas regulator is provided at the upper port thereof. A tower head structure is provided at the port of the connecting elbow far from the gas regulator. A limit nut is provided at the lower end of the gas storage pressure-reducing buffer valve, and an adjusting knob is threadedly connected to the limit nut.

[0006] As an improvement, the connecting elbow includes a cavity, the gas regulator includes a limiting sleeve threadedly connected to the upper end of the cavity, a limiting post is threadedly connected to the inner side of the limiting sleeve, one end of the limiting post extends out of the cavity, the other end is arranged inside the cavity and a sealing ring is arranged on the outer side, and the end of the limiting post extending into the cavity is conical.

[0007] As an improvement, a plurality of limiting grooves are uniformly arranged on the side surface of the limiting post, and limiting holes are uniformly arranged on the side surface of the limiting sleeve.

[0008] As an improvement, the reducing head structure includes a limiting threaded sleeve arranged at the lower end of the cavity, a reducing head matched with the limiting post is arranged inside the limiting threaded sleeve, and one end of the reducing head far away from the cavity extends out of the threaded sleeve.

[0009] As an improvement, fixing holes are uniformly arranged on the side surface of the limiting nut, and fixing grooves are arranged on the side surface of the adjusting knob.

[0010] The beneficial effects of the present utility model are as follows:

[0011] The original gas output connecting elbow part is changed to a tee elbow structure. A plurality of limiting grooves are uniformly arranged on the side surface of the limiting post for locking the limiting post. For the vertical part of the tee structure, the lower part is connected to an outlet reducing head. When the gas pipeline pressure is not 0.35 MPa set by the original product, after adjusting the height of the floating bead to the corresponding position of the flowmeter scale with the limiting post, then turn the original adjusting knob for adjusting the flow rate at the lower part of the original product to compensate for the pressure, so that the actually adjusted output flow rate is consistent with the scale of the flowmeter.

[0012] The original output elbow is changed to be provided with flow control and can be set with current limiting, which can lock the gas flow rate, so that the on-site welders cannot randomly increase the gas flow rate. Compared with the technology of ZL202221535029.6, pressure compensation is added, making the energy-saving flowmeter group structure more reasonable, and it can better serve the majority of welding users, thereby improving the forming quality of their welded products and saving the cost of shielding gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the first sectional structure schematic diagram of the present utility model;

[0014] Figure 2 is the enlarged schematic diagram of Structure A of the present utility model;

[0015] Figure 3 is the second sectional structure schematic diagram of the present utility model;

[0016] Figure 4 is the enlarged schematic diagram of Structure B of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The specific implementation of the utility model is further described below in conjunction with the accompanying drawings, wherein the same parts are represented by the same reference numerals.

[0018] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0019] In order to make the content of the utility model easier to understand, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Figures 1 to 2 As shown, a gas pressure reducing flow meter group includes a flow meter 1 and a gas storage pressure reducing buffer valve 2, the flow meter 1 is provided with an air inlet, an inner tube 12 and an outer tube 11, an air passage 10 is provided between the inner tube 12 and the outer tube 11, a high pressure chamber 4 and a low pressure chamber 5 are provided inside the gas storage pressure reducing buffer valve 2, a connecting elbow 6 is provided on the gas storage pressure reducing buffer valve 2, a hollow screw column 3 is integrally provided at the bottom of the flow meter 1, and the hollow screw column 3 is threadedly sealed and connected to the gas storage pressure reducing buffer valve 2; a gas is provided inside the hollow screw column 3 The flow meter 1 is provided with an oblique passage 9 connecting the airway 10 and the air hole 8; the air hole 8 connects the airway 10 and the high-pressure chamber 4, the air hole 8 is used as the outlet of the flow meter 1, and is also used as the air inlet of the gas storage pressure relief buffer valve 2. The connecting elbow 6 is a three-way elbow and a gas regulator is provided at its upper end. The opening of the connecting elbow 6 away from the gas regulator is provided with a pagoda head structure. The lower end of the gas storage pressure relief buffer valve 2 is provided with a limit nut 22 and an adjusting knob 21 is threadedly connected to the limit nut 22. The connecting elbow 6 includes a cavity 18, and the gas regulator includes a screw

[0020] The limiting sleeve 13 is connected to the upper end of the cavity 18 by a thread, and the inner side of the limiting sleeve 13 is connected to the limiting column 7 by a thread. One end of the limiting column 7 extends out of the cavity 18, and the other end is arranged in the cavity 18 and a sealing ring 15 is arranged on the outer side. The end of the limiting column 7 extending into the cavity 18 is in a conical shape. A plurality of limiting grooves 16 are evenly arranged on the side of the limiting column 7, and a limiting hole 14 is evenly arranged on the side of the limiting sleeve 13. The pagoda head structure includes a limiting threaded sleeve 19 arranged at the lower end of the cavity 18, and a pagoda head 20 cooperating with the limiting column 7 is arranged on the inner side of the limiting threaded sleeve 19, and the end of the pagoda head 20 away from the cavity 18 extends out of the threaded sleeve 19.

[0021] That is, the gas output part and the flow adjustment are set together, the original flow adjustment knob part is set as a pressure compensation mechanism (gas regulator), the original gas output elbow part is changed into a three-way elbow, the process adopts the original valve body part from die casting to copper rod processing, the gas output part (elbow) opens a limit groove 16 (12×1.0 wire), which is used to lock the three-way elbow by screws after connecting the gas adjustment, and the three-way elbow process adopts 59-1 copper die casting and then machine tool processing technology. The horizontal part is connected to the gas output part of the valve body with 12×1.0 wire. The vertical part of the three-way structure is connected to the pagoda head 20 at the bottom, and the upper part is a rotatable limit column 7 of a conical structure with a front head and two sealing rings, which is used to adjust the gas output flow, and in the conical structure Two grooves are milled on the copper rod on the upper part of the adjusting knob, with an angle of 180 degrees (or more, which need to be set evenly), and a hole is opened on the limit sleeve 13 to accommodate the hexagon socket screw for pressing against the limit groove 16 of the limit column 7, so that when the gas flow is adjusted to any suitable flow, the hexagon socket screw and the limit groove 16 are fixed together. The hexagon socket screw is made of a rust-proof material. This can solve two problems: when the gas pipeline pressure is not 0.35MPa set in the original product, after adjusting the float height to the corresponding position of the flow meter scale with the limit column 7, the original flow adjustment knob 21 at the bottom of the original product is turned to compensate for the pressure, so as to achieve the consistency between the adjusted actual output flow and the flow meter scale.

[0022] The original output elbow is changed to one with flow control and can be set with current limiting, which can lock the gas flow so that on-site welders cannot adjust the gas flow at will. Compared with ZL202221535029.6 technology, pressure compensation is added, making the structure of the energy-saving flow meter group more reasonable, which can better serve the majority of welding users, thereby improving the molding quality of welding products for them and saving shielding gas costs.

[0023] like Figures 3 to 4 As shown, the side of the limit nut 22 is evenly provided with fixing holes 23, and the side of the adjusting knob 21 is provided with a fixing groove 24. After the gas used is fully adjusted, the adjusting knob 21 can be fixed in a fixed position by a hexagonal screw, and it is not easy to loosen.

[0024] The above description is only a preferred embodiment of the present utility model patent and is not intended to limit the present utility model patent. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model patent shall be included in the protection scope of the present utility model patent.

Claims

1. A gas pressure reducing flow meter assembly, comprising a flow meter (1) and a gas storage pressure reducing buffer valve (2), wherein the flow meter (1) is provided with an air inlet, an inner tube (12) and an outer tube (11), an air passage (10) is provided between the inner tube (12) and the outer tube (11), a high pressure chamber (4) and a low pressure chamber (5) are provided inside the gas storage pressure reducing buffer valve (2), a connecting elbow (6) is provided on the gas storage pressure reducing buffer valve (2), and a hollow screw column (3) is integrally provided at the bottom of the flow meter (1), The hollow screw column (3) is threadedly sealed and connected to the gas storage pressure reducing buffer valve (2); an air hole (8) is provided in the hollow screw column (3), and an oblique channel (9) connecting the air passage (10) and the air hole (8) is provided on the flow meter (1); the air hole (8) connects the air passage (10) and the high pressure chamber (4), and the air hole (8) is used as the air outlet of the flow meter (1) and the air inlet of the gas storage pressure reducing buffer valve (2), characterized in that: The connecting elbow (6) is a three-way elbow and a gas regulator is provided at its upper end opening; the connecting elbow (6) is provided with a pagoda head structure at its opening away from the gas regulator; a limiting nut (22) is provided at the lower end of the gas storage pressure reducing buffer valve (2) and an adjusting knob (21) is threadedly connected to the limiting nut (22).

2. A gas pressure reducing flow meter set according to claim 1, characterized in that: The connecting elbow (6) comprises a cavity (18), and the gas regulator comprises a limiting sleeve (13) threadedly connected to the upper end of the cavity (18), the inner side of the limiting sleeve (13) being threadedly connected to a limiting column (7), one end of the limiting column (7) extending out of the cavity (18), and the other end being arranged in the cavity (18) and having a sealing ring (15) arranged on the outer side, and the end of the limiting column (7) extending into the cavity (18) is conical.

3. A gas pressure reducing flow meter set according to claim 2, characterized in that: A plurality of limiting grooves (16) are evenly arranged on the side surface of the limiting column (7), and a plurality of limiting holes (14) are evenly arranged on the side surface of the limiting sleeve (13).

4. A gas pressure reducing flow meter set according to claim 2, characterized in that: The pagoda head structure comprises a limiting threaded sleeve (19) arranged at the lower end of the cavity (18), a pagoda head (20) cooperating with the limiting column (7) is arranged on the inner side of the limiting threaded sleeve (19), and the end of the pagoda head (20) away from the cavity (18) extends out of the threaded sleeve (19).

5. A gas pressure reducing flow meter set according to claim 1, characterized in that: The side surface of the limiting nut (22) is evenly provided with fixing holes (23), and the side surface of the adjusting knob (21) is provided with a fixing groove (24).

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