CO2 pressure reducing device

Abstract

The utility model relates to the technical field of carbon dioxide pressure reduction, in particular to a CO2 pressure reduction device which comprises a valve body, a low-pressure cavity formed in the middle of the top end of the valve body, a high-pressure cavity formed below the low-pressure cavity and communicated with the low-pressure cavity, a high-pressure air inlet communicated with the left side of the high-pressure cavity, and a low-pressure air outlet communicated with the lower portion of the right side of the low-pressure cavity. A pressure reducing assembly used for converting high-pressure CO in the high-pressure cavity into low-pressure CO is arranged between the low-pressure cavity and the high-pressure cavity, an electronic adjusting valve assembly used for adjusting the pressure of the low-pressure cavity is arranged in the low-pressure cavity, one side of the low-pressure cavity is connected with a pressure transmitter through a low-pressure communicating pipe, and a controller is arranged in the pressure transmitter. The pressure transmitter transmits pressure signals of the low-pressure cavity to the controller, the controller controls the electronic adjusting valve assembly to adjust the pressure value of the low-pressure cavity, the low-pressure air outlet hole is connected with a flow meter through a low-pressure air outlet nozzle, and the right end of the flow meter is connected with an air outlet pipe.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon dioxide decompression, in particular to a CO2 decompression device. Background Art

[0002] In CO2 vaporization and pressure reducing system equipment, self-operated pressure reducing valves are generally used. This type of pressure reducing valve adjusts the size of the valve opening by the pressure behind the valve. Different operating pressures need to be adjusted manually, and when the gas consumption fluctuates too much, the valve plate is easily damaged. Utility Model Content

[0003] The purpose of the utility model is to provide a CO2 decompression device to solve the technical problems existing in the above-mentioned background technology.

[0004] To achieve the above purpose, the technical solution of the utility model is as follows:

[0005] A CO pressure reducing device comprises: a valve body, a low-pressure air outlet nozzle, a low-pressure connecting pipe, a pressure transmitter and a flow meter, wherein a low-pressure chamber is provided at the middle of the top of the valve body, a high-pressure chamber connected to the low-pressure chamber is provided at the bottom of the valve body, a high-pressure air inlet is connected to the left side of the high-pressure chamber, a low-pressure air outlet is connected to the bottom right side of the low-pressure chamber, a pressure reducing assembly for converting the high-pressure CO in the high-pressure chamber into low-pressure CO is arranged between the low-pressure chamber and the high-pressure chamber, an electronic regulating valve assembly for adjusting the pressure of the low-pressure chamber is arranged in the low-pressure chamber, one side of the low-pressure chamber is connected to the pressure transmitter through the low-pressure connecting pipe, the pressure transmitter has a built-in controller, the pressure transmitter transmits the pressure signal of the low-pressure chamber to the controller, the controller controls the electronic regulating valve assembly to adjust the pressure value of the low-pressure chamber, the low-pressure air outlet is connected to the flow meter through the low-pressure air outlet nozzle, and the right end of the flow meter is connected to the air outlet pipe.

[0006] Furthermore, an air inlet connecting hole and an air outlet connecting hole are respectively provided on the left and right sides of the valve body. The air inlet connecting hole is connected with the high-pressure air inlet hole, and the right end of the high-pressure air inlet nozzle is threadedly connected to the air inlet connecting hole. The air outlet connecting hole is connected with the low-pressure air outlet hole, and the left end of the low-pressure air outlet nozzle is threadedly connected to the air outlet connecting hole.

[0007] Furthermore, it also includes: a sealing gasket, wherein a sealing gasket is provided between the right end of the high-pressure air inlet nozzle and the right end of the air inlet connecting hole and between the left end of the low-pressure air outlet nozzle and the left end of the air outlet connecting hole.

[0008] Furthermore, the decompression assembly includes: a ejector pin, a spherical needle tip, a spring, a clamping cap and a valve core. A clamping cap is arranged between the low-pressure chamber and the high-pressure chamber. The clamping cap is hollow inside and has a valve hole and a separation hole at the upper and lower ends respectively. An ejector pin is arranged in the high-pressure chamber. The top end of the ejector pin is fixedly connected to the spherical needle tip. The ejector pin is sleeved with a spring whose two ends respectively clamp the bottom end of the high-pressure chamber and the bottom end of the spherical needle tip. The spherical needle tip seals and clamps the bottom end of the separation hole. The top end of the spherical needle tip is fixedly connected to the valve core. The lower part of the valve core movably passes through the separation hole. The top end of the valve core is in an inverted cone shape and seals and clamps the valve hole.

[0009] Furthermore, the decompression assembly also includes: an annular sealing ring, which is embedded and fixed in the separation hole, the spherical surface of the spherical needle tip matches the circular hole at the bottom end of the annular sealing ring, and the radius of the spherical needle tip is larger than the radius of the circular hole of the annular sealing ring.

[0010] Furthermore, a vertical slide groove is provided in the middle of the bottom end of the high-pressure chamber, and the lower part of the ejector pin is vertically slidably connected in the vertical slide groove.

[0011] Furthermore, the electronic regulating valve assembly includes: a piston, a screw sleeve, a guide column, a fixing frame, a column, a fixing seat, a bearing, a screw, a servo motor and a motor bracket, the piston is vertically sealed and slidably connected in the low-pressure chamber, the middle part of the top of the piston is fixedly connected to the bottom end of the screw sleeve, one side of the outer wall of the screw sleeve is fixedly connected to the guide column, the fixing frame is fixedly connected to the inner wall of the upper part of the low-pressure chamber, a vertical circular hole is opened in the middle of the fixing frame, a guide hole is opened on one side of the vertical circular hole, the screw sleeve and the guide column are vertically slidably connected in the vertical circular hole and the guide hole respectively, a plurality of columns are evenly fixedly connected to the top of the fixing frame, the tops of the plurality of columns are fixedly connected to the fixing seat, a vertical through hole is opened in the middle of the fixing seat, the inner wall of the vertical through hole is fixedly connected to the outer ring of the bearing, the inner ring of the bearing is fixedly connected to the upper part of the outer wall of the screw, the lower part of the screw is threadedly connected to the screw sleeve, the top of the screw is fixedly connected to the output end of the servo motor, and the servo motor is fixedly mounted on the top of the fixing seat through the motor bracket.

[0012] Furthermore, the electronic regulating valve assembly also includes: an O-ring, an annular groove is formed on the arc-shaped side wall of the piston, and the O-ring is embedded in the annular groove.

[0013] Furthermore, a top cover is detachably fixedly mounted on the top of the valve body, and the top cover is used to cover the electronic regulating valve assembly. A plurality of air holes are opened on the side wall of the top cover.

[0014] Furthermore, a vent hole is opened on one side of the inner wall of the low-pressure chamber, one end of a low-pressure connecting pipe is fixedly connected to one side of the outer wall of the valve body, the low-pressure connecting pipe is connected to the vent hole, and the other end of the low-pressure connecting pipe is connected to a pressure transmitter.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] By using the electronic regulating valve assembly in conjunction with the pressure transmitter, the position of the piston can be adjusted according to the pressure value set by the pressure transmitter, that is, the valve opening of the electronic regulating valve assembly can be adjusted; the electronic regulating valve assembly controls the gas output volume to achieve the purpose of pressure reduction; by using the electronic regulating valve assembly in conjunction with the flow meter, the effect of accurate gas consumption can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model at the fixing frame;

[0020] Figure 4 It is a top view of the utility model;

[0021] Figure 5 The utility model is Figure 4 Cross-sectional view at AA in the middle.

[0022] The numbers in the accompanying drawings are: 1-valve body, 101-low-pressure chamber, 102-high-pressure chamber, 103-high-pressure air inlet, 104-low-pressure air outlet, 105-vertical slide, 106-vent, 2-high-pressure air inlet nozzle, 3-low-pressure air outlet nozzle, 4-sealing gasket, 5-thimble, 6-spherical needle tip, 7-spring, 8-pressure cap, 9-annular sealing ring, 10-valve core, 11-piston, 12-O-ring, 13-screw, 14-guide column, 15-fixed frame, 16-column, 17-fixed seat, 18-bearing, 19-screw, 20-servo motor, 21-motor bracket, 22-top cover, 23-low-pressure connecting pipe, 24-pressure transmitter, 25-flow meter, 26-air outlet pipe. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0024] See also Figures 1 to 5As shown, a CO2 decompression device comprises: a valve body 1, a low-pressure gas outlet nozzle 3, a low-pressure connecting pipe 23, a pressure transmitter 24 and a flow meter 25. A low-pressure chamber 101 is provided in the middle of the top of the valve body 1, and a high-pressure chamber 102 connected to the low-pressure chamber 101 is provided below the valve body 1. A high-pressure gas inlet hole 103 is connected to the left side of the high-pressure chamber 102, and a low-pressure gas outlet hole 104 is connected to the right side of the low-pressure chamber 101. A pressure transmitter 24 is provided between the low-pressure chamber 101 and the high-pressure chamber 102 for converting the high-pressure CO2 in the high-pressure chamber 102 into low-pressure gas. A pressure reducing component for high-pressure CO2, an electronic regulating valve component for adjusting the pressure of the low-pressure chamber 101 is arranged in the low-pressure chamber 101, one side of the low-pressure chamber 101 is connected to a pressure transmitter 24 through a low-pressure connecting pipe 23, the pressure transmitter 24 has a built-in controller, the pressure transmitter 24 transmits the pressure signal of the low-pressure chamber 101 to the controller, the controller controls the electronic regulating valve component to adjust the pressure value of the low-pressure chamber 101, the low-pressure air outlet 104 is connected to a flow meter 25 through a low-pressure air outlet nozzle 3, and the right end of the flow meter 25 is connected to an air outlet pipe 26.

[0025] An air inlet connecting hole and an air outlet connecting hole are respectively provided on the left and right sides of the valve body 1. The air inlet connecting hole is connected to the high-pressure air inlet hole 103, and the right end of the high-pressure air inlet nozzle 2 is connected to the inner thread of the air inlet connecting hole. The air outlet connecting hole is connected to the low-pressure air outlet hole 104, and the left end of the low-pressure air outlet nozzle 3 is connected to the inner thread of the air outlet connecting hole.

[0026] The CO2 decompression device also includes: a sealing gasket 4. A sealing gasket 4 is arranged between the right end of the high-pressure air inlet nozzle 2 and the right end of the air inlet connecting hole and between the left end of the low-pressure air outlet nozzle 3 and the left end of the air outlet connecting hole. The arranged sealing gasket 4 can ensure the sealing of the air inlet and outlet.

[0027] The pressure reducing assembly comprises: an ejector pin 5, a spherical needle tip 6, a spring 7, a clamping cap 8, an annular sealing ring 9 and a valve core 10. A clamping cap 8 is arranged between the low-pressure chamber 101 and the high-pressure chamber 102. The clamping cap 8 is hollow inside and has valve holes and separation holes at the upper and lower ends respectively. An ejector pin 5 is arranged in the high-pressure chamber 102. The top of the ejector pin 5 is fixedly connected with the spherical needle tip 6. The ejector pin 5 is sleeved with a spring 7 at both ends of which respectively clamp the bottom end of the high-pressure chamber 102 and the bottom end of the spherical needle tip 6. The spherical needle tip 6 seals the pressure reducing assembly. The bottom end of the separation hole is tightly closed, and the top end of the spherical needle tip 6 is fixedly connected to the valve core 10. The lower part of the valve core 10 movably passes through the separation hole. The top end of the valve core 10 is inverted cone shape and seals and presses the valve hole. The annular sealing ring 9 is embedded and fixed in the separation hole. The spherical surface of the spherical needle tip 6 matches the circular hole at the bottom end of the annular sealing ring 9. The radius of the spherical needle tip 6 is larger than the radius of the circular hole of the annular sealing ring 9. A vertical slide groove 105 is opened in the middle of the bottom end of the high-pressure chamber 102, and the lower part of the ejector pin 5 is vertically slidably connected in the vertical slide groove 105.

[0028] The electronic regulating valve assembly includes: a piston 11, an O-ring 12, a screw sleeve 13, a guide column 14, a fixing frame 15, a column 16, a fixing seat 17, a bearing 18, a screw 19, a servo motor 20 and a motor bracket 21. The piston 11 is vertically sealed and slidably connected in the low-pressure chamber 101. The middle of the top of the piston 11 is fixedly connected to the bottom of the screw sleeve 13, and one side of the outer wall of the screw sleeve 13 is fixedly connected to the guide column 14. The fixing frame 15 is fixedly connected to the upper inner wall of the low-pressure chamber 101. A vertical circular hole is opened in the middle of the fixing frame 15, and a guide hole is opened on one side of the vertical circular hole. The screw sleeve 13 and the guide column 14 are respectively vertically slidably connected to the vertical Into the circular hole and the guide hole, a plurality of columns 16 are evenly fixedly connected to the top of the fixing frame 15, and a fixing seat 17 is fixedly connected to the top of the plurality of columns 16. A vertical through hole is opened in the middle of the fixing seat 17, and the outer ring of the bearing 18 is fixedly connected to the inner wall of the vertical through hole, and the upper part of the outer wall of the screw 19 is fixedly connected to the inner ring of the bearing 18. The lower part of the screw 19 is threadedly connected to the screw sleeve 13, and the output end of the servo motor 20 is fixedly connected to the top of the screw 19. The servo motor 20 is fixedly installed on the top of the fixing seat 17 through the motor bracket 21; an annular groove is opened on the arc-shaped side wall of the piston 11, and the O-ring 12 is embedded in the annular groove.

[0029] A top cover 22 is detachably fixedly mounted on the top of the valve body 1 . The top cover 22 is used to cover the electronic regulating valve assembly. A plurality of air holes are formed on the side wall of the top cover 22 .

[0030] A vent hole 106 is provided on one side of the inner wall of the low-pressure chamber 101 , and one end of a low-pressure connecting pipe 23 is fixedly connected to one side of the outer wall of the valve body 1 . The low-pressure connecting pipe 23 is connected to the vent hole 106 , and the other end of the low-pressure connecting pipe 23 is connected to a pressure transmitter 24 .

[0031] When the device is in use, the CO2 cylinder is connected through the high-pressure gas inlet nozzle 2, and the CO2 high-pressure gas enters the high-pressure chamber 102 through the high-pressure gas inlet hole 103 through the high-pressure gas inlet nozzle 2. At this time, the CO2 high-pressure gas applies downward pressure to the spherical surface of the spherical needle tip 6, squeezing the spring 7, and the spherical needle tip 6 is separated from the bottom end of the circular hole of the annular sealing ring 9, and the high-pressure CO2 gas enters the inner cavity of the compression cap 8. At the same time, since the top of the spherical needle tip 6 is fixedly connected to the valve core 10, the lower part of the valve core 10 movably penetrates the separation hole, the top of the valve core 10 is inverted cone shape and seals the valve hole, and the high-pressure CO2 gas passes through the valve The gas enters the low-pressure chamber 101 through the hole and becomes low-pressure CO2 gas. The low-pressure value is set by the pressure transmitter 24, and the servo motor 20 is controlled to rotate forward or reverse. The servo motor 20 drives the screw 19 to rotate and then drives the screw sleeve 13 to rise and fall, thereby realizing the rise and fall of the piston 11. The pressure value of the CO2 gas in the low-pressure chamber 101 is controlled by adjusting the volume of the low-pressure chamber 101. The low-pressure CO2 gas enters the flow meter 25 from the low-pressure outlet hole 104 and the low-pressure outlet nozzle 3 and is finally discharged from the outlet pipe 26. The electronic regulating valve assembly is used in conjunction with the flow meter 25 to achieve the effect of accurate gas consumption.

[0032] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inside", "outside", "top / bottom" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0033] The above description is only a preferred embodiment of the utility model and does not constitute any form of limitation to the utility model. Any technician familiar with the profession, without departing from the scope of the technical solution of the utility model and based on the technical essence of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment shall still fall within the scope of protection of the technical solution of the utility model.

Claims

1. A CO2 decompression device, characterized in that: include: A valve body (1), a low-pressure air outlet nozzle (3), a low-pressure connecting pipe (23), a pressure transmitter (24) and a flow meter (25); a low-pressure chamber (101) is provided in the middle of the top of the valve body (1); a high-pressure chamber (102) is provided below the low-pressure chamber (101) and is connected to the low-pressure chamber; a high-pressure air inlet (103) is connected to the left side of the high-pressure chamber (102); a low-pressure air outlet (104) is connected to the right side of the low-pressure chamber (101); a pressure reducing device for converting the high-pressure CO2 in the high-pressure chamber (102) into low-pressure CO2 is provided between the low-pressure chamber (101) and the high-pressure chamber (102). The low-pressure chamber (101) is provided with an electronic regulating valve assembly for regulating the pressure of the low-pressure chamber (101); one side of the low-pressure chamber (101) is connected to a pressure transmitter (24) via a low-pressure connecting pipe (23); the pressure transmitter (24) has a built-in controller; the pressure transmitter (24) transmits the pressure signal of the low-pressure chamber (101) to the controller; the controller controls the electronic regulating valve assembly to regulate the pressure value of the low-pressure chamber (101); the low-pressure air outlet (104) is connected to a flow meter (25) via a low-pressure air outlet nozzle (3); the right end of the flow meter (25) is connected to an air outlet pipe (26).

2. A CO2 decompression device according to claim 1, characterized in that: The valve body (1) is provided with an air inlet connection hole and an air outlet connection hole on the left and right sides respectively. The air inlet connection hole is connected to the high-pressure air inlet hole (103), and the right end of the high-pressure air inlet nozzle (2) is connected to the inner thread of the air inlet connection hole. The air outlet connection hole is connected to the low-pressure air outlet hole (104), and the left end of the low-pressure air outlet nozzle (3) is connected to the inner thread of the air outlet connection hole.

3. A CO2 decompression device according to claim 2, characterized in that: Also includes: A sealing gasket (4) is provided between the right end of the high-pressure air inlet nozzle (2) and the right end of the air inlet connecting hole, and between the left end of the low-pressure air outlet nozzle (3) and the left end of the air outlet connecting hole.

4. A CO2 decompression device according to claim 1, characterized in that: The decompression assembly comprises: a push pin (5), a spherical needle tip (6), a spring (7), a clamping cap (8) and a valve core (10). A clamping cap (8) is arranged between the low-pressure chamber (101) and the high-pressure chamber (102). The clamping cap (8) is hollow inside and has a valve hole and a separation hole at its upper and lower ends respectively. The high-pressure chamber (102) is provided with a push pin (5). The top end of the push pin (5) is fixedly connected to the spherical needle tip (6). The push pin (5) is sleeved with a spring (7) at both ends of which respectively clamp the bottom end of the high-pressure chamber (102) and the bottom end of the spherical needle tip (6). The spherical needle tip (6) seals and clamps the bottom end of the separation hole. The top end of the spherical needle tip (6) is fixedly connected to the valve core (10). The lower part of the valve core (10) movably passes through the separation hole. The top end of the valve core (10) is inverted cone shape and seals and clamps the valve hole.

5. A CO2 decompression device according to claim 4, characterized in that: The decompression assembly further comprises: an annular sealing ring (9), the annular sealing ring (9) being embedded and fixed in the separation hole, the spherical surface of the spherical needle tip (6) being matched with the circular hole at the bottom end of the annular sealing ring (9), and the radius of the spherical needle tip (6) being larger than the radius of the circular hole of the annular sealing ring (9).

6. A CO2 decompression device according to claim 4, characterized in that: A vertical slide groove (105) is provided in the middle of the bottom end of the high-pressure chamber (102), and the lower part of the ejector pin (5) is vertically slidably connected in the vertical slide groove (105).

7. A CO2 decompression device according to claim 1, characterized in that: The electronic regulating valve assembly comprises: a piston (11), a screw sleeve (13), a guide column (14), a fixing frame (15), a column (16), a fixing seat (17), a bearing (18), a screw rod (19), a servo motor (20) and a motor bracket (21); the piston (11) is vertically sealed and slidably connected in a low-pressure chamber (101); the middle of the top end of the piston (11) is fixedly connected to the bottom end of the screw sleeve (13); one side of the outer wall of the screw sleeve (13) is fixedly connected to the guide column (14); the fixing frame (15) is fixedly connected to the upper inner wall of the low-pressure chamber (101); a vertical circular hole is opened in the middle of the fixing frame (15); a guide hole is opened on one side of the vertical circular hole; the screw sleeve (11) is fixedly connected to the inner wall of the upper part of the low-pressure chamber (101); a vertical circular hole is opened in the middle of the fixing frame (15); a guide hole is opened on one side of the vertical circular hole; 3) and the guide column (14) are respectively vertically slidably connected in the vertical circular hole and the guide hole, the top of the fixing frame (15) is evenly fixedly connected with a plurality of columns (16), the tops of the plurality of columns (16) are fixedly connected with a fixing seat (17), a vertical through hole is opened in the middle of the fixing seat (17), the inner wall of the vertical through hole is fixedly connected with the outer ring of the bearing (18), the inner ring of the bearing (18) is fixedly connected with the upper part of the outer wall of the screw (19), the lower part of the screw (19) is threadedly connected with the screw sleeve (13), the top of the screw (19) is fixedly connected with the output end of the servo motor (20), and the servo motor (20) is fixedly installed on the top of the fixing seat (17) through a motor bracket (21).

8. A CO2 decompression device according to claim 7, characterized in that: The electronic regulating valve assembly further comprises an O-ring (12); an annular groove is provided on the arc-shaped side wall of the piston (11); and the O-ring (12) is embedded in the annular groove.

9. A CO2 decompression device according to claim 7, characterized in that: A top cover (22) is detachably fixedly mounted on the top of the valve body (1), and the top cover (22) is used to cover the electronic regulating valve assembly. A plurality of air holes are provided on the side wall of the top cover (22).

10. A CO2 decompression device according to claim 1, characterized in that: A vent hole (106) is provided on one side of the inner wall of the low-pressure chamber (101), one end of a low-pressure connecting pipe (23) is fixedly connected to one side of the outer wall of the valve body (1), the low-pressure connecting pipe (23) is connected to the vent hole (106), and the other end of the low-pressure connecting pipe (23) is connected to a pressure transmitter (24).

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