Constant voltage and constant current device and welding and cutting equipment

Abstract

This application discloses a constant pressure and constant flow device for regulating gas pressure and flow rate. The device includes: a valve body; an inlet and an outlet on the outer wall of the valve body; a constant pressure regulating buffer chamber and a constant flow regulating buffer chamber connected to each other inside the valve body; an inlet and an outlet connected to the constant pressure regulating buffer chamber via an inlet pipe; an outlet and an outlet connected to the constant flow regulating buffer chamber via an outlet pipe; a constant pressure regulating structure disposed within the constant pressure regulating buffer chamber for regulating gas pressure; and a constant flow regulating structure disposed within the constant flow regulating buffer chamber for regulating gas flow rate. This application also discloses a welding and cutting device. This application can improve the stability of the gas flow rate at the end point, overcome the influence of high-pressure surges on welding results, and reduce excess gas emissions.

Description

Technical Field

[0001] This invention relates to the field of gas pressure reduction technology, specifically to a constant pressure and constant current device and welding and cutting equipment. Background Technology

[0002] In the existing technology, gas pressure reducing valves are generally installed at the gas source output end. Due to the long output pipeline, the pressure drop at the end of the gas supply and the instability of the airflow are aggravated.

[0003] Existing gas pressure reducing valves are prone to producing surging airflow and pressure relief during welding. Furthermore, some welding processes that demand high welding quality require stable output airflow. Therefore, there is an urgent need to improve existing gas pressure reducing valves to enhance the stability of the end-user airflow, overcome the impact of surging air pressure on welding results, and reduce excessive gas emissions. Summary of the Invention

[0004] The purpose of this invention is to provide a constant pressure and constant current device and welding and cutting equipment, in order to overcome the above-mentioned technical problems.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a constant pressure and constant flow device for regulating the pressure and flow rate of a gas, characterized in that the constant pressure and constant flow device comprises: a valve body; an inlet and an outlet are provided on the outer wall of the valve body; a constant pressure regulating buffer chamber and a constant flow regulating buffer chamber are provided inside the valve body and are interconnected; the inlet and the constant pressure regulating buffer chamber are connected by an inlet pipe; the outlet and the constant flow regulating buffer chamber are connected by an outlet pipe; a constant pressure regulating structure is provided in the constant pressure regulating buffer chamber for regulating the gas pressure; and a constant flow regulating structure is provided in the constant flow regulating buffer chamber for regulating the gas flow rate.

[0006] In some possible implementations, the constant pressure and constant flow device further includes a solenoid valve disposed on the outer wall of the valve body for opening or closing the outlet pipe.

[0007] In this embodiment, the constant pressure regulating structure includes: a first constant pressure valve core assembly, a second constant pressure valve core assembly, and a third constant pressure valve core assembly; the first constant pressure valve core assembly includes a first valve core body, which is provided with a gas delivery channel communicating with the air inlet pipe; the third constant pressure valve core assembly includes a third valve core body, which is provided with a gas delivery pipeline communicating with the constant flow regulating buffer chamber; the second constant pressure valve core assembly includes a second valve core body, which passes through the third valve core body and is set at a preset angle with the third valve core body; an adaptive pressure regulating component is disposed between the first constant pressure valve core assembly and the second constant pressure valve core assembly, and is used to regulate the gas pressure entering the gas delivery pipeline from the gas delivery channel.

[0008] In some possible implementations, the first constant pressure valve core assembly further includes a plurality of first constant pressure sealing rings, which are sleeved on the first valve core body and disposed between the inner wall of the constant pressure regulating buffer cavity and the first valve core body.

[0009] In some possible implementations, the first constant pressure valve core assembly further includes a first retainer disposed within the valve body to prevent the first valve core body from sliding out of the valve body.

[0010] In this embodiment, the first valve core body is a cylinder containing a cavity; an air passage is provided at one end of the first valve core body near the second constant pressure valve core assembly, communicating with the cavity of the first valve core body; an annular groove is provided along the circumference of the first valve core body, and a plurality of air passages communicating with the cavity of the first valve core body are uniformly arranged in the annular groove along the axis of the first valve core body. The annular groove is correspondingly arranged with the air inlet pipe, and the annular groove, the plurality of air passages, the cavity of the first valve core body, and the air passages are configured as the air delivery channel.

[0011] In some possible implementations, the second constant pressure valve core assembly further includes a plurality of second constant pressure sealing rings, which are sleeved on the second valve core body and disposed between the inner wall of the constant pressure regulating buffer chamber and the second valve core body.

[0012] In this embodiment, the second valve core body is cylindrical, and a receiving space is provided along the axis of the second valve core body; a venting groove is provided along the circumference of the second valve core body, and the venting groove is connected to the gas supply pipeline.

[0013] In some possible implementations, the third constant pressure valve core assembly further includes a plurality of third constant pressure sealing rings, which are sleeved on the third valve core body and disposed between the inner wall of the constant pressure regulating buffer chamber and the third valve core body.

[0014] In some possible implementations, the third constant pressure valve core assembly further includes a second retainer disposed within the valve body to prevent the third valve core body from sliding out of the valve body.

[0015] In this embodiment, the third valve core body is cylindrical, and a stepped hole is provided along the axial direction of the third valve core body; an air supply groove is provided along the circumference of the third valve core body, and the air supply groove is located between the air inlet and the air inlet pipe; an air inlet hole is provided along the radial direction of the third valve core body; the air inlet hole is provided corresponding to the air venting groove, and the air inlet hole and the stepped hole are connected through the air venting groove; the air inlet hole, the air venting groove, and the stepped hole are configured as the air supply pipeline.

[0016] In some possible implementations, the constant pressure regulating buffer chamber includes an airtight chamber that is connected to the air supply channel; the inner wall of the constant pressure regulating buffer chamber is also provided with a connecting groove for connecting the airtight chamber and the air inlet.

[0017] In this embodiment, the adaptive pressure regulating assembly includes: a first constant pressure regulating elastic element and a constant pressure regulating rubber plug disposed in the accommodating cavity of the first valve core body, wherein the first constant pressure regulating elastic element is disposed at the end opposite to the vent hole; a second constant pressure regulating elastic element disposed in the accommodating space of the second valve core body and disposed parallel to the axis of the second valve core body; and a constant pressure regulating piston, the constant pressure regulating piston including a first cylindrical body and a first push rod connected in sequence, the first cylindrical body abutting against the second constant pressure regulating elastic element, and the first push rod passing through the vent hole and abutting against the constant pressure regulating rubber plug.

[0018] In some possible implementations, the adaptive pressure regulation assembly further includes a constant pressure throttle block sleeved on the first push rod and disposed between the first cylindrical body and the first valve core body.

[0019] In some possible implementations, the adaptive pressure regulating component further includes a preset pressure regulator disposed within the receiving space of the second valve core body, facing away from the constant pressure regulating piston and abutting against the second constant pressure regulating elastic element.

[0020] In this embodiment, an annular retaining ring is provided between the constant pressure regulating buffer chamber and the constant current regulating buffer chamber, and the constant pressure regulating buffer chamber and the constant current regulating buffer chamber are connected through the circular hole of the annular retaining ring.

[0021] In this embodiment, the constant flow adjustment structure includes: a knob adjustment assembly disposed within the constant flow adjustment buffer chamber; a constant flow adjustment elastic element disposed within the stepped hole of the third valve core body; a constant flow adjustment rubber plug, one end of which abuts against the constant flow adjustment elastic element and the other end of which abuts against the annular retaining ring; and a constant flow adjustment piston, the constant flow adjustment piston including a second cylindrical body and a second push rod connected in sequence, the second cylindrical body abutting against the knob adjustment assembly, and the second push rod passing through the circular hole of the annular retaining ring and abutting against the constant flow adjustment rubber plug.

[0022] In some possible implementations, the constant flow regulating structure further includes a constant flow throttle block, which is sleeved on the second push rod and disposed between the second cylindrical body and the constant flow baffle ring.

[0023] In this embodiment, the knob adjustment assembly includes: a knob seat disposed on the outer wall of the valve body; a knob elastic element disposed between the knob seat and the constant flow regulating piston, abutting against the cylindrical body of the constant flow regulating piston; a knob cover disposed on the knob seat, on the side opposite to the knob elastic element; a transmission pin passing through the knob elastic element, one end of which is connected to the knob cover; and an adjusting nut sleeved on the transmission pin, disposed between the knob seat and the knob elastic element.

[0024] The present invention also discloses a welding and cutting device, characterized in that it includes the constant voltage and constant current device in any of the above embodiments.

[0025] The constant pressure and constant current device and welding / cutting equipment of the present invention have the following advantages compared with the prior art: The system is equipped with constant pressure and constant flow regulation structures to achieve secondary flow and pressure stabilization. It can adaptively adjust under different initial pressures of the gas source, improve the stability of the gas flow at the end, and overcome the influence of the surge pressure on the welding effect. The preset pressure regulator of the adaptive pressure regulation component is set to facilitate the adjustment of the initial gas pressure range that this application is adapted to, thereby expanding the scope of application of this application; A knob adjustment component is provided for easy adjustment of the gas consumption of the end-user gas equipment; The constant pressure and constant flow device is installed on the end gas-using equipment to avoid pressure drop and airflow instability at the end of the gas supply, while reducing excess gas emissions. Attached Figure Description

[0026] Figure 1 This is a front view of a valve body according to an embodiment of this application; Figure 2 This is a top view of a valve body according to an embodiment of this application; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 This is a left view of a valve body according to an embodiment of this application; Figure 5 for Figure 4 BB-direction sectional view; Figure 6 This is a front view of a constant voltage and constant current device according to an embodiment of this application; Figure 7 This is a top view of a constant voltage and constant current device according to an embodiment of this application; Figure 8 for Figure 7 CC-direction sectional view; Figure 9 This is an exploded view of the overall structure of a constant pressure and constant current device according to an embodiment of this application; Figure 10 This is an exploded view of the overall structure of a constant pressure and constant current device according to another embodiment of this application; Figure 11 This is a schematic diagram of the overall structure of the first valve core body according to an embodiment of this application; Figure 12 This is a schematic diagram of the overall structure of the second valve core body according to an embodiment of this application; Figure 13 This is a schematic diagram of the overall structure of the third valve core body according to an embodiment of this application; Figure 14 This is a schematic diagram of the overall structure of a welding and cutting device according to an embodiment of this application. Detailed Implementation

[0027] Embodiments embodying the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various variations in different examples without departing from the scope of the invention, and the descriptions and illustrations herein are for illustrative purposes only and not intended to limit the invention.

[0028] It should be understood that although the terms "first," "second," etc., may be used herein to describe various features, these features should not be limited by these terms. The use of these terms is merely for distinction and should not be construed as indicating or implying relative importance. For example, without departing from the scope of the exemplary embodiments, a first feature may be referred to as a second feature, and similarly, a second feature may be referred to as a first feature.

[0029] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral molding; they can refer to a mechanical connection, a direct connection, a welding connection, or a connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the accompanying drawings and specific circumstances.

[0030] This application provides a constant pressure and constant flow device for regulating the pressure and flow rate of gas. Figure 1 This is a front view of a valve body according to an embodiment of this application; Figure 2 This is a top view of a valve body according to an embodiment of this application; Figure 3 for Figure 2 Sectional view along axis AA; Figure 4 This is a right view of a valve body according to an embodiment of this application; Figure 5 for Figure 4 BB-direction sectional view; Figure 6 This is a front view of a constant voltage and constant current device according to an embodiment of this application; Figure 7 This is a top view of a constant voltage and constant current device according to an embodiment of this application; Figure 8 for Figure 7 CC-direction sectional view; Figure 9 This is an exploded view of the overall structure of a constant pressure and constant current device according to an embodiment of this application; Figure 10 This is an exploded view of the overall structure of a constant voltage and constant current device according to another embodiment of this application. (Combined with...) Figures 1-10 As shown, the constant pressure and constant flow device 10 includes: a valve body 100; an air inlet 101 and an air outlet 102 are provided on the outer wall of the valve body 100; a constant pressure regulating buffer chamber 103 and a constant flow regulating buffer chamber 104 are provided inside the valve body 100 and are interconnected; the air inlet 101 and the constant pressure regulating buffer chamber 103 are connected by an air inlet pipe 105; the air outlet 102 and the constant flow regulating buffer chamber 104 are connected by an air outlet pipe 106; a constant pressure regulating structure 200 is provided in the constant pressure regulating buffer chamber 103 and is used to regulate the gas pressure; and a constant flow regulating structure 300 is provided in the constant flow regulating buffer chamber 104 and is used to regulate the gas flow rate.

[0031] In some possible implementations, for easy connection to the air inlet 101, the constant pressure and constant flow device 10 also includes an air inlet connector (not shown in the figure). The air inlet connector is located outside the valve body 100, with one end connected to the air inlet 101 and the other end connected to the air source.

[0032] In some possible implementations, for easy connection to end-use gas equipment (not shown in the figure), the constant pressure and constant flow device 10 also includes an outlet connector, which is located outside the valve body 100, with one end connected to the outlet 102 and the other end connected to the end-use gas equipment.

[0033] In other embodiments of this application, in order to achieve the on / off switching of the gas, such as Figure 10 and combined Figure 3 , Figure 5 and Figure 8 As shown, the constant pressure and constant flow device 10 also includes a solenoid valve 400, which is disposed on the outer wall of the valve body 100 and is used to open or close the gas outlet pipe 106.

[0034] In one specific embodiment of this application, the solenoid valve 400 includes at least a housing, a sleeve, a fixed iron core, a moving iron core, a compression spring, and a coil. The housing is fixed to the valve body 100 above the outlet pipe 106, and has a through hole at its bottom. The sleeve is fixed inside the housing corresponding to the through hole. The coil is wound on the sleeve. The fixed iron core is fixed to the top of the sleeve. The moving iron core is slidably connected inside the sleeve. The upper and lower ends of the compression spring are fixedly connected to the fixed iron core and the moving iron core, respectively. The top of the valve body 100 has a piston hole connecting the through hole and the outlet pipe 106. The moving iron core passes through the piston hole into the outlet pipe 106 to close the outlet end. When the coil is not energized, the moving iron core, under the action of the compression spring, passes through the piston hole and seals the outlet end of the outlet pipe 106. When the coil is energized, the coil imparts a magnetic force to the fixed iron core, which attracts the moving iron core, causing it to move away from the outlet pipe 106 and opening the outlet end of the outlet pipe 106.

[0035] In a specific example of this application, the solenoid valve 400 is a low-pressure solenoid valve.

[0036] In the above embodiments, Figure 11 This is a schematic diagram of the overall structure of the first valve core body according to an embodiment of this application; Figure 12 This is a schematic diagram of the overall structure of the second valve core body according to an embodiment of this application; Figure 13 This is a schematic diagram of the overall structure of the third valve core body according to an embodiment of this application. Figure 8 and combined Figures 9 to 13As shown, the constant pressure regulating structure 200 includes: a first constant pressure valve core assembly 201, a second constant pressure valve core assembly 202, and a third constant pressure valve core assembly 203; the first constant pressure valve core assembly includes a first valve core body 2011, which has a gas delivery channel communicating with the air inlet pipe 105; the third constant pressure valve core assembly 203 includes a third valve core body 2031, which has a gas delivery pipeline communicating with the constant flow regulating buffer chamber 104; the second constant pressure valve core assembly 202 includes a second valve core body 2021, which passes through the third valve core body 2031 and is set at a preset angle with the third valve core body 2031; and an adaptive pressure regulating component 204 is disposed between the first constant pressure valve core assembly 201 and the second constant pressure valve core assembly 202, for regulating the gas pressure entering the gas delivery pipeline from the gas delivery channel.

[0037] Preferably, the second valve core body 2021 and the third valve core body 2031 are arranged intersectingly. More preferably, they are arranged perpendicularly. In other embodiments, they may be arranged intersecting at other angles.

[0038] In some possible implementations, such as Figure 8 As shown, to prevent gas leakage, the first constant pressure valve core assembly 201 also includes several first constant pressure sealing rings 2012, which are sleeved on the first valve core body 2011 and disposed between the inner wall of the constant pressure regulating buffer chamber 103 and the first valve core body 2011.

[0039] In some possible implementations, such as Figure 8 and combined Figure 9 and Figure 10 As shown, the first constant pressure valve core assembly 201 also includes a first ring retainer 2013, which is disposed in the valve body 100. The valve body 100 has a corresponding groove to accommodate the first ring retainer 2013. The first ring retainer 2013 prevents the first valve core body 2011 from sliding out of the valve body 100.

[0040] In one specific embodiment of this application, such as Figure 11 and combined Figure 9 and Figure 10As shown, the first valve core body 2011 is a cylinder containing a cavity; an air passage 2014 communicating with the cavity of the first valve core body 2011 is provided at one end of the first valve core body 2011 near the second constant pressure valve core assembly 202; an annular groove 2015 is provided along the circumference of the first valve core body 2011, and several air passages 2016 communicating with the cavity of the first valve core body 2011 are evenly provided in the annular groove 2015 along the axis of the first valve core body 2011; the annular groove 2015 is correspondingly provided with the air inlet pipe 105; the annular groove 2015, several air passages 2016, the cavity of the first valve core body 2011 and the air passage 2014 are configured as an air supply channel.

[0041] Specifically, the gas flows through the interior of the first valve core body 2011, entering the annular groove 2015 through the inlet pipe 105. Under the constraint of several first constant pressure sealing rings 2012, the gas fills the annular groove 2015. Through several vent holes 2016, the gas enters the interior of the first valve core body 2011 and then flows out of the first valve core body 2011 through the vent hole 2014. Those skilled in the art should understand that the gas enters the valve body 100 through the inlet port 101. Under the constraint of the inlet pipe 105, the gas flow direction changes from horizontal to vertical. After being constrained by the annular groove 2015 and several vent holes 2016, the gas flow direction changes from vertical to horizontal (the opposite direction of the inlet direction), and then flows out of the first valve core body 2011 through the vent hole 2014.

[0042] In some possible implementations, such as Figure 8 As shown, to prevent gas leakage, the second constant pressure valve core assembly 202 also includes several second constant pressure sealing rings 2022, which are sleeved on the second valve core body 2021 and are disposed between the inner wall of the constant pressure regulating buffer chamber 103 and the second valve core body 2021.

[0043] In one specific embodiment of this application, such as Figure 12 and combined Figure 9 and Figure 10 As shown, the second valve core body 2021 is cylindrical; a receiving space is provided along the axis of the second valve core body 2021, and a venting groove 2023 is provided along the circumference of the second valve core body 2021. The venting groove 2023 is connected to the air supply pipeline of the third valve core body 2031.

[0044] In the above embodiments, preferably, the second valve core body 2021 is connected to the valve body 100 by threads.

[0045] Specifically, the gas flows through the venting groove 2023 and does not enter the interior of the second valve core body 2021. Those skilled in the art should understand that the gas is confined within the space enclosed by the venting groove 2023 and the inner wall of the third valve core body 2031.

[0046] In some possible implementations, such as Figure 8 As shown, to prevent gas leakage, the third constant pressure valve core assembly 203 also includes several third constant pressure sealing rings 2032, which are sleeved on the third valve core body 2031 and are disposed between the inner wall of the constant pressure regulating buffer chamber 103 and the third valve core body 2031.

[0047] In some possible implementations, such as Figure 8 and combined Figure 9 and Figure 10 As shown, the third constant pressure valve core assembly 203 also includes a second ring retainer 2033, which is disposed in the valve body 100. The valve body 100 has a corresponding groove to accommodate the second ring retainer 2033, and the second ring retainer 2033 prevents the third valve core body 2031 from sliding out of the valve body.

[0048] In one specific embodiment of this application, such as Figure 13 and combined Figure 9 and Figure 10 As shown, the third valve core body 2031 is cylindrical, and a stepped hole 2034 is provided along the axis of the third valve core body 2031; an air supply groove 2035 is provided along the circumference of the third valve core body 2031, and the air supply groove 2035 is located between the air inlet 101 and the air inlet pipe 105; an air inlet hole 2036 is provided along the radial direction of the third valve core body 2031, and the air inlet hole 2036 is provided corresponding to the air venting groove 2035. The air inlet hole 2036 and the stepped hole 2034 are connected through the air venting groove 2023; the air inlet hole 2036, the air venting groove 2023 and the stepped hole 2034 are configured as an air supply pipeline.

[0049] In one specific embodiment of this application, the constant pressure regulating buffer cavity 103 includes an airtight chamber 1031, which is connected to the air supply channel; the inner side wall of the constant pressure regulating buffer cavity 103 is also provided with a connecting groove for connecting the airtight chamber 1031 and the air inlet 2036.

[0050] In the above embodiment, preferably, in order to facilitate gas flow, the air inlet 2036 is configured to be concave (recessed towards the axis of the third valve core body 2031), that is, at the location of the air inlet 2036, there is a gap between the third valve core body 2031 and the inner wall of the constant pressure regulating buffer chamber 103 to facilitate gas flow.

[0051] In one specific embodiment of this application, such as Figure 1 and combined Figure 9 and Figure 10 As shown, for ease of processing and manufacturing, the connecting groove is achieved by opening a connecting hole 107 on the valve body 100.

[0052] In one specific embodiment of this application, such as Figure 7 and combined Figure 9 and Figure 10 As shown, the constant pressure and constant flow device 10 also includes a plug 500, which is disposed in the connecting hole 107 to block the connecting hole 107 in order to maintain the airtightness of the constant pressure regulating buffer chamber 103.

[0053] In some other possible embodiments of this application, a pressure gauge (not shown in the figure, the pressure gauge is optional) may be installed at the plug 500 position to observe the gas pressure status after constant pressure regulation in the constant pressure regulating buffer chamber 103.

[0054] Specifically, gas enters the valve body 100 through the inlet 101. Under the constraint of several third constant-pressure sealing rings 2032, the gas first fills the gas delivery groove 2035, then enters the airtight chamber 1031 through the inlet pipe 105 and gas delivery channel, then flows into the inlet hole 2036 through the connecting groove, and then changes its flow direction again from horizontal to vertical through the ventilation groove 2023. The gas then flows out of the gas delivery pipeline of the third valve core body 2031 through the stepped hole 2034. Those skilled in the art should understand that the gas passes through the interior of the third valve core body 2031 at this time.

[0055] In one specific embodiment of this application, such as Figure 8 and combined Figure 9 and Figure 10 As shown, the adaptive pressure regulating assembly 204 includes: a first constant pressure regulating elastic element 2041 and a constant pressure regulating rubber plug 2042 mutually abutting each other in the receiving cavity of the first valve core body 2011, wherein the first constant pressure regulating elastic element 2041 is disposed at one end opposite to the vent hole 2014; a second constant pressure regulating elastic element 2043 is disposed in the receiving space of the second valve core body 2021 and is arranged parallel to the axis of the second valve core body 2021; a constant pressure regulating piston 2044 includes a first cylindrical body 20441 and a first push rod 20442 connected in sequence, the first cylindrical body 20441 abutting the second constant pressure regulating elastic element 2043, and the first push rod 20442 passing through the vent hole 2014 and abutting the constant pressure regulating rubber plug 2042.

[0056] In the above embodiments, preferably, both the first constant pressure adjusting elastic element 2041 and the second constant pressure adjusting elastic element 2043 are springs.

[0057] Specifically, such as Figure 9 and Figure 10As shown, a step 20111 is provided in the receiving cavity of the first valve core body 2011 for placing the constant pressure regulating rubber plug 2042 and preventing the constant pressure regulating rubber plug 2042 from deviating. Preferably, the diameter of the cavity of the first valve core body 2011 is larger than the diameter of the through hole 2014 of the first valve core body 2011. For ease of processing and manufacturing, the first valve core body 2011 is divided into two parts (2011a and 2011b), and 2011a and 2011b are connected by threads to form a whole, namely 2011. Those skilled in the art should understand that 2011a and 2011b are interchangeable. In one embodiment, 2011a is provided with a step 20111, and 2011b is provided with an annular groove 2015 and several vent holes 2016. In another embodiment, 2011a is provided with a step 20111, an annular groove 2015 and several vent holes 2016, and 2011b is simply a bottom cover-like shape that is threadedly connected to 2011a.

[0058] In the above embodiments, those skilled in the art should understand that the diameter of the constant pressure regulating rubber plug 2042 is larger than the diameter of the through hole 2014 of the first valve core body 2011. Under the elastic force of the first constant pressure regulating elastic member 2041 and the second constant pressure regulating elastic member 2043, the first push rod 20442 drives the constant pressure regulating rubber plug 2042 to approach or move away from the air passage 2014 of the first valve core body 2011, so as to regulate the pressure of the gas entering the airtight chamber 1031 from the gas supply channel.

[0059] In some possible implementations, in order to better adjust the gas movement path, such as Figure 8 and combined Figure 9 and Figure 10 As shown, the adaptive pressure regulation component 204 also includes a constant pressure throttle block 2045, which is sleeved on the first push rod 20442 and positioned between the first cylindrical body 20441 and the first valve core body 2011. Gas enters the airtight chamber 1031 through small holes on the throttle block 2045.

[0060] Specifically, gas flows out of the gas delivery channel of the first valve core body 2011 and into the airtight chamber 1031, where it is confined within the space enclosed by the first cylindrical body 20441 of the constant pressure regulating piston 2044, the constant pressure throttle block 2045, and the inner wall of the constant pressure regulating buffer chamber 103. After constant pressure regulation, the gas flows through the air inlet 2036, the ventilation groove 2023, and the stepped hole 2034, and then flows out of the gas delivery pipeline of the third valve core body 2031.

[0061] During the use of this application, the gas pressure of the gas source will fluctuate. Furthermore, to expand the scope of application of this application, in a specific embodiment of this application, preferably, as follows: Figure 8 and combined Figure 9 and Figure 10 As shown, the adaptive pressure regulating component 204 also includes a preset pressure regulator 2046, which is disposed in the receiving space of the second valve core body 20121, facing away from the constant pressure regulating piston 2044 and abutting against the second constant pressure regulating elastic member 2043.

[0062] In the above embodiment, preferably, the preset pressure regulator 2046 and the second valve core body 20121 are connected by threads. The inner sidewall of the accommodating space of the second valve core body 20121 is provided with internal threads, and the preset pressure regulator 2046 is provided with external threads. The pressure value of the second constant pressure regulating elastic element 2043 is adjusted by turning the preset pressure regulator 2046.

[0063] Specifically, in actual use, the pressure value of the second constant pressure regulating elastic element 2043 needs to be calibrated according to the gas pressure requirements of the terminal gas device. In a specific example, the gas pressure output from the gas source is P1, and the gas pressure of the terminal gas device is P2. At this time, the inlet 101 is connected to the gas source, and the gas pressure value is stabilized at P1. The pressure value of the second constant pressure regulating elastic element 2043 is adjusted by turning the preset pressure regulator 2046. When the gas pressure at the outlet 102 is P2 (or measured by installing a pressure gauge at the plug 500), the calibration is completed. At this time, the elastic forces of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043 are balanced, the gap between the constant pressure regulating rubber plug 2042 and the constant pressure throttle block 2045 is fixed, and the gas flow is stable.

[0064] Under actual factory operating conditions, the gas pressure value of the gas source will not remain stable and will fluctuate within a certain range. Specifically, when the gas flows through the gas delivery channel of the first valve core body 2011, the gas will exert a thrust on the constant pressure regulating rubber plug 2042. That is, when the calibration is completed, the elastic force of the second constant pressure regulating elastic element 2043 is balanced with the sum of the elastic force of the first constant pressure regulating elastic element 2041 and the gas thrust. When the gas pressure value of the gas source suddenly increases, the gas will exert a larger thrust (compared to the calibration value) on the constant pressure regulating rubber plug 2042, breaking the original balance of the elastic forces of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043. At this time, the gap between the constant pressure regulating rubber plug 2042 and the gas passage 2014 becomes smaller, the gas flow rate decreases, and the elastic forces of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043 reach a balance again. When the gas pressure of the gas source decreases, the gas exerts a smaller (compared to the calibrated value) thrust on the constant pressure regulating rubber plug 2042, breaking the original elastic force balance between the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043. At this time, the gap between the constant pressure regulating rubber plug 2042 and the air passage 2014 increases, the gas flow increases, and the elastic forces of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043 reach balance again. The gas pressure output from the gas delivery channel of the first valve core body 2011 is adaptively adjusted through the elastic force balance of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043. The gas pressure output from the gas delivery channel does not change with the magnitude of the external air intake pressure, achieving a constant pressure effect. It can adaptively adjust under different initial gas source pressures, improve the stability of the end-use gas flow, and overcome the influence of flood pressure on the welding effect.

[0065] Specifically, by changing the length of the screwing process of the preset pressure regulator 2046, the initial pressure values ​​of the first constant pressure regulating elastic element 2041 and the second constant pressure regulating elastic element 2043, the pressure of the end gas-using device at the outlet 102 is adjusted, thereby expanding the scope of application of this application and expanding the fluctuation range of the gas source pressure.

[0066] In one specific embodiment of this application, such as Figure 3 and Figure 8 As shown, an annular retaining ring 108 is provided between the constant pressure regulating buffer chamber 103 and the constant current regulating buffer chamber 104, and the constant pressure regulating buffer chamber 103 and the constant current regulating buffer chamber 104 are connected through the circular hole 109 of the annular retaining ring 108.

[0067] In one specific embodiment of this application, such as Figure 8 and combined Figure 9 and Figure 10As shown, the constant flow regulating structure 300 includes: a knob regulating assembly 301 disposed in the constant flow regulating buffer chamber 104; a constant flow regulating elastic element 302 disposed in the stepped hole 2034 of the third valve core body 2031; a constant flow regulating rubber plug 303, one end of which abuts against the constant flow regulating elastic element 302, and the other end of which abuts against the annular retaining ring 108; and a constant flow regulating piston 304, which includes a second cylindrical body 3041 and a second push rod 3042 connected in sequence. The second cylindrical body 3041 abuts against the knob regulating assembly 301, and the second push rod 3042 passes through the circular hole 109 of the annular retaining ring 108 and abuts against the constant flow regulating rubber plug 303.

[0068] In the above embodiments, preferably, the constant current regulating elastic element 302 is a spring.

[0069] In the above embodiment, after the gas flows out of the gas delivery pipeline of the third valve core body 2031, it enters the space enclosed by the annular baffle 108, the constant flow regulating rubber plug 303, and the inner wall of the constant pressure regulating buffer chamber 103. Those skilled in the art should understand that the diameter of the constant flow regulating rubber plug 303 is larger than the diameter of the circular hole 109 of the annular baffle 108. Under the interaction of the knob adjustment assembly 301 and the constant flow regulating elastic element 302, the second push rod 3042 is pushed, causing the constant flow regulating rubber plug 303 to move closer to or further away from the circular hole 109 of the annular baffle 108, thereby regulating the flow rate of the gas entering the constant flow regulating buffer chamber 104 from the gas delivery pipeline of the third valve core body 2031.

[0070] In some possible implementations, in order to better adjust the gas movement path, such as Figure 8 and combined Figure 9 and Figure 10 As shown, the constant flow regulating structure 300 also includes a constant flow throttle block 305, which is sleeved on the second push rod 3042 and is located between the second cylindrical body 3041 and the constant flow baffle ring 108.

[0071] In the above embodiment, the gas entering the constant flow regulating buffer chamber 104 is confined within the space enclosed by the second cylindrical body 3041 of the constant flow regulating piston 304, the constant flow throttle block 305, and the inner wall of the constant flow regulating buffer chamber 104. Then, the gas enters the end gas-using equipment through the gas outlet pipe 106 and the gas outlet 102.

[0072] In one specific embodiment of this application, such as Figure 8 and combined Figure 9 and Figure 10As shown, the knob adjustment assembly 301 includes: a knob seat 3011, disposed on the outer wall of the valve body 100; a knob elastic element 3012, disposed between the knob seat 3011 and the constant flow regulating piston 304, abutting against the cylindrical body 3041 of the constant flow regulating piston 304; a knob cover 3013, disposed on the knob seat 3011, on the side opposite to the knob elastic element 3012; a transmission pin 3014, passing through the knob elastic element 3012, with one end connected to the knob cover 3013; and an adjusting nut 3015, sleeved on the transmission pin 3014, disposed between the knob seat 3011 and the knob elastic element 3012.

[0073] In the above embodiments, preferably, the knob elastic element 3012 is a spring.

[0074] Specifically, rotating the knob cover 3013 causes the transmission pin 3014 to rotate, and the adjusting nut 3015 moves up or down along the transmission pin 3014, thereby reducing or increasing the pressure of the knob elastic element 3012. This causes the second push rod 3042 to push the constant flow regulating rubber plug 303 closer to or further away from the round hole 109 of the annular retaining ring 108, so as to regulate the flow rate of gas entering the constant flow regulating buffer chamber 104 from the gas supply line of the third valve core body 2031, thereby regulating the gas consumption of the terminal gas-using equipment.

[0075] This application provides a welding and cutting device. Figure 14 This is a schematic diagram of the overall structure of a welding and cutting device according to an embodiment of this application. Figure 14 As shown, in one specific embodiment, the welding and cutting equipment is a wire feeder. The constant pressure and constant current device 10 in the above embodiment is installed on the wire feeder 20. The air inlet 101 of the constant pressure and constant current device 10 is connected to the air source 21, and the air outlet 102 of the constant pressure and constant current device 10 is connected to the welding gun air source interface 22.

[0076] In the above embodiments, the constant pressure and constant flow device 10 is installed on the end-use gas equipment (replacing the original solenoid valve position of the wire feeder 20) to avoid end-use gas pressure drop and airflow instability, while reducing excess gas emissions.

[0077] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0078] Although the present invention has been described in detail through the preferred embodiments above, it should be understood that the above description should not be considered as a limitation of the present invention. Various modifications and substitutions to the present invention will be apparent to those skilled in the art after reading the above description. Therefore, the scope of protection of the present invention should be defined by the appended claims.

Claims

1. A constant pressure and constant flow device for regulating the pressure and flow rate of gas, characterized in that, The constant voltage and constant current device includes: Valve body; An air inlet and an air outlet are provided on the outer wall of the valve body; The valve body is provided with a constant pressure regulating buffer chamber and a constant flow regulating buffer chamber that are interconnected. The air inlet is connected to the constant pressure regulating buffer chamber via an air inlet pipe; The air outlet is connected to the constant flow regulating buffer chamber via an air outlet pipe; A constant pressure regulating structure is disposed within the constant pressure regulating buffer chamber for regulating the gas pressure; A constant flow regulating structure is disposed within the constant flow regulating buffer chamber and is used to regulate the gas flow rate.

2. The constant voltage and constant current device as described in claim 1, characterized in that, It also includes a solenoid valve, which is located on the outer wall of the valve body, for opening or closing the air outlet pipe.

3. The constant voltage and constant current device as described in claim 1 or 2, characterized in that, The constant pressure regulating structure includes: First constant pressure valve core assembly, second constant pressure valve core assembly and third constant pressure valve core assembly; The first constant pressure valve core assembly includes a first valve core body, and the first valve core body is provided with an air delivery channel communicating with the air inlet pipe; The third constant pressure valve core assembly includes a third valve core body, and the third valve core body is provided with a gas delivery pipeline that communicates with the constant flow regulating buffer chamber. The second constant pressure valve core assembly includes a second valve core body, which passes through the third valve core body and is set at a preset angle with the third valve core body; An adaptive pressure regulating component is disposed between the first constant pressure valve core component and the second constant pressure valve core component, and is used to regulate the gas pressure entering the gas pipeline from the gas delivery channel.

4. The constant voltage and constant current device as described in claim 3, characterized in that, The first valve core body is a cylinder containing a cavity; an air passage is provided at one end of the first valve core body near the second constant pressure valve core assembly, which communicates with the cavity of the first valve core body; an annular groove is provided along the circumference of the first valve core body, and a plurality of air passages communicating with the cavity of the first valve core body are evenly provided in the annular groove along the axis of the first valve core body. The annular groove is correspondingly provided with the air inlet pipe. The annular groove, the plurality of air passages, the cavity of the first valve core body, and the air passages are configured as the air delivery channel.

5. The constant voltage and constant current device as described in claim 4, characterized in that, The second valve core body is cylindrical, and a receiving space is provided along the axis of the second valve core body; a venting groove is provided along the circumference of the second valve core body, and the venting groove is connected to the gas transmission pipeline.

6. The constant voltage and constant current device as described in claim 5, characterized in that, The third valve core body is cylindrical, and a stepped hole is provided along the axis of the third valve core body; an air supply groove is provided along the circumference of the third valve core body, and the air supply groove is located between the air inlet and the air inlet pipe; an air inlet hole is provided along the radial direction of the third valve core body; the air inlet hole is provided corresponding to the air venting groove, and the air inlet hole and the stepped hole are connected through the air venting groove; the air inlet hole, the air venting groove, and the stepped hole are configured as the air supply pipeline.

7. The constant voltage and constant current device as described in claim 6, characterized in that, The constant pressure regulating buffer chamber includes an airtight chamber that is connected to the air supply channel; the inner wall of the constant pressure regulating buffer chamber is also provided with a connecting groove for connecting the airtight chamber and the air inlet.

8. The constant voltage and constant current device as described in claim 5, characterized in that, The adaptive pressure regulation component includes: A first constant pressure adjusting elastic element and a constant pressure adjusting rubber plug are mutually abutting each other in the receiving cavity of the first valve core body, wherein the first constant pressure adjusting elastic element is disposed at the end opposite to the air passage. The second constant pressure regulating elastic element is disposed within the accommodating space of the second valve core body and is arranged parallel to the axis of the second valve core body; A constant pressure regulating piston, comprising a first cylindrical body and a first push rod connected in sequence, the first cylindrical body abutting against a second constant pressure regulating elastic element, and the first push rod passing through the vent hole and abutting against the constant pressure regulating rubber plug.

9. The constant voltage and constant current device as described in claim 8, characterized in that, The adaptive pressure regulation component also includes a constant pressure throttle block, which is sleeved on the first push rod and disposed between the first cylindrical body and the first valve core body.

10. The constant voltage and constant current device as described in claim 8, characterized in that, The adaptive pressure regulating component further includes a preset pressure regulator, which is disposed within the accommodating space of the second valve core body, facing away from the constant pressure regulating piston and abutting against the second constant pressure regulating elastic element.

11. The constant voltage and constant current device as described in claim 6, characterized in that, An annular retaining ring is provided between the constant pressure regulating buffer chamber and the constant current regulating buffer chamber, and the constant pressure regulating buffer chamber and the constant current regulating buffer chamber are connected through the circular hole of the annular retaining ring.

12. The constant voltage and constant current device as described in claim 11, characterized in that, The constant current regulation structure includes: A knob adjustment assembly is disposed within the constant current adjustment buffer chamber; A constant flow regulating elastic element is disposed in the stepped hole of the third valve core body; A constant flow regulating rubber plug, one end of which abuts against the constant flow regulating elastic element, and the other end of which abuts against the annular retaining ring; A constant flow regulating piston includes a second cylindrical body and a second push rod connected in sequence. The second cylindrical body abuts against the knob regulating assembly, and the second push rod passes through the circular hole of the annular retaining ring and abuts against the constant flow regulating rubber plug.

13. The constant voltage and constant current device as described in claim 12, characterized in that, The constant flow adjustment structure also includes a constant flow throttle block, which is sleeved on the second push rod and disposed between the second cylindrical body and the constant flow baffle ring.

14. The constant voltage and constant current device as described in claim 13, characterized in that, The knob adjustment assembly includes: A knob seat is located on the outer wall of the valve body; A knob elastic element is disposed between the knob seat and the constant flow regulating piston, and abuts against the cylindrical body of the constant flow regulating piston; A knob cover is disposed on the knob base, on the side opposite to the knob elastic element; A transmission pin passes through the elastic element of the knob, and one end is connected to the knob cover. An adjusting nut is fitted onto the transmission pin and positioned between the knob seat and the knob elastic element.

15. A welding and cutting device, characterized in that, It includes the constant voltage and constant current device as described in any one of claims 1-12.

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