A cold pump air volume adjusting device

Abstract

The utility model relates to cold pump air quantity adjusting technical field especially relates to a kind of cold pump air quantity adjusting device, including shell, fixture, nitrogen end base, driving mechanism, first control valve and second control valve;The driving mechanism is arranged in shell, and the output end of the driving mechanism is connected fixture by pivot, first eccentric wheel and second eccentric wheel are sleeved on the pivot, nitrogen end base is fixed on the shell, first control valve and second control valve are installed on the nitrogen end base, first control valve and second control valve are respectively used to control independent air path passage, when the driving mechanism rotates, first eccentric wheel actuates first control valve to open its corresponding air path passage, or make second eccentric wheel actuate second control valve to open its corresponding air path passage.The utility model solves the problem that operator is difficult to understand valve state accurately in real time in traditional cold pump air quantity adjusting device.

Description

Technical Field

[0001] This utility model relates to the field of cold pump air volume regulation technology, and in particular to a cold pump air volume regulation device. Background Technology

[0002] In the field of industrial refrigeration and gas control, cold pump gas flow regulation devices are key components for ensuring the stability and efficiency of process flows. However, existing cold pump gas flow regulation devices generally suffer from some significant drawbacks, which limit their performance in high-precision, high-efficiency applications. One major problem is that operators find it difficult to directly observe the specific operating status of valves. Traditional devices typically lack intuitive indication or observation mechanisms, making it extremely difficult to monitor whether valves are properly open or closed. This not only affects the accuracy of gas flow control but may also lead to production interruptions or other safety issues caused by the failure to detect valve malfunctions in a timely manner.

[0003] Because it's impossible to know the valve status accurately in real time, operators often have to rely on indirect methods or periodic inspections to confirm valve operation. This approach is time-consuming, increases maintenance costs, and cannot completely eliminate potential risks. Furthermore, this opaque operating environment increases the difficulty of equipment commissioning and troubleshooting, further reducing system reliability and efficiency.

[0004] In order to solve the above-mentioned technical problems, this utility model designs a cold pump gas volume regulating device. Utility Model Content

[0005] This utility model provides a cold pump gas volume regulating device, which aims to solve the problem that operators cannot accurately and in real time understand the valve status in traditional cold pump gas volume regulating devices. The technical solution is as follows:

[0006] A cold pump gas volume regulating device includes a housing, a fixture, a nitrogen end base, a drive mechanism, a first control valve, and a second control valve. The drive mechanism is disposed inside the housing, and its output end is connected to the fixture via a rotating shaft. A first eccentric wheel and a second eccentric wheel are mounted on the rotating shaft. The nitrogen end base is fixed to the housing, and the first control valve and the second control valve are installed on the nitrogen end base. The first control valve and the second control valve are respectively used to control independent gas passages. When the drive mechanism rotates, the first eccentric wheel actuates the first control valve to open its corresponding gas passage, or the second eccentric wheel actuates the second control valve to open its corresponding gas passage.

[0007] Based on the above technical solution, both the first control valve and the second control valve are normally closed valves.

[0008] Based on the above technical solution, the first control valve includes a swing arm bracket and a control valve body; a swing arm is hinged on the swing arm bracket, and a clamping part is provided at the end of the swing arm. The control valve body is disposed between the clamping parts. When the first eccentric wheel presses down on the swing arm, the valve core of the control valve body overcomes the spring pressure and disengages from the sealing valve seat to open the passage.

[0009] Preferably, the valve core includes a cylindrical portion and an elongated portion. The cylindrical portion is movably embedded in the clamping portion, and the end of the elongated portion abuts against the adjusting bolt. The adjusting bolt is threaded onto the rocker arm. By turning the adjusting bolt, the axial extension length of the elongated portion is changed, thereby adjusting the preload position of the cylindrical portion relative to the clamping portion.

[0010] Beneficial effects

[0011] Compared with existing technologies, the advantages of this utility model are as follows: 1. By rotating the drive mechanism, the first and second eccentric wheels are driven to control the first and second control valves respectively to open the corresponding gas passages. This design allows for more precise control of gas flow, ensuring the accuracy and reliability of gas path switching under different working conditions. 2. The fixture in this device is equipped with positioning grooves and scale lines, allowing users to quickly adjust and determine the position as needed. Furthermore, since both the first and second control valves are normally closed valves, they remain closed when not subjected to the action of the eccentric wheels, which helps prevent accidental leakage and improves operational safety and efficiency. 3. By introducing an adjustable design, such as an adjusting bolt, into the control valve, the preload position of the valve core relative to the clamping part can be easily adjusted, thereby adapting to different working conditions or compensating for wear caused by long-term use. This design not only enhances the adaptability of the system but also greatly simplifies the maintenance process and extends the service life of the equipment. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other embodiments can be derived from the provided drawings without creative effort.

[0013] Figure 1 : A schematic diagram of the structure of this utility model;

[0014] Figure 2 : Schematic diagram of the internal structure of this utility model;

[0015] Figure 3 : Front view of this utility model;

[0016] Figure 4 : Figure 3Sectional view of AA;

[0017] Figure 5 : Figure 3 Sectional view of BB;

[0018] Figure 6 : A schematic diagram showing the positions of the first control valve and the second control valve of this utility model;

[0019] Figure 7 : A schematic diagram of the structure of the first control valve of this utility model;

[0020] Figure 8 : A schematic diagram of the connection of the fixture described in this utility model;

[0021] Figure 9 : A schematic diagram of the structure of the fixture described in this utility model;

[0022] Figure 10 : A schematic diagram of the scale lines of the fixture described in this utility model;

[0023] Figure 11 : Schematic diagram of the eccentric wheel of this utility model. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and examples:

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figure 1 and Figure 2 As shown, a cold pump gas volume regulating device includes a housing 1, a fixture 2, a nitrogen end base 3, a drive mechanism 4, a first control valve 7, and a second control valve 8.

[0029] The drive mechanism 4 is housed inside the housing 1. The output end of the drive mechanism 4 is connected to the fixture 2 via a rotating shaft. The rotating shaft is fitted with a first eccentric wheel 5 and a second eccentric wheel 6.

[0030] The drive mechanism 4 is a motor, and the output end of the motor is connected to the fixture 2 through a rotating shaft, which drives the first eccentric wheel 5, the second eccentric wheel 6 and the fixture 2 to rotate.

[0031] Nitrogen end base 3 is fixedly connected to the outer shell 1. A first control valve 7 and a second control valve 8 are installed on the nitrogen end base 3. The first control valve 7 and the second control valve 8 are used to control independent gas passages. When the drive mechanism 4 rotates, the first eccentric wheel 5 actuates the first control valve 7 to open its corresponding gas passage, or the second eccentric wheel 6 actuates the second control valve 8 to open its corresponding gas passage.

[0032] Both the first control valve 7 and the second control valve 8 are normally closed valves. The first control valve 7 includes a rocker arm bracket and a control valve body; a rocker arm 71 is hinged to the rocker arm bracket, and a clamping part is provided at the end of the rocker arm 71. The control valve body is disposed between the clamping parts. Under normal conditions, it is pressed against the sealing valve seat by spring pressure to close the passage. When the first eccentric wheel 5 presses down on the rocker arm 71, the valve core of the control valve body overcomes the spring pressure and disengages from the sealing valve seat to open the passage.

[0033] Specifically, when the drive mechanism 4 starts to rotate, it drives the first eccentric wheel 5 and the second eccentric wheel 6 mounted on it to rotate together via a rotating shaft. As the drive mechanism 4 rotates, the first eccentric wheel 5 gradually approaches and eventually contacts the first control valve 7. Due to the design features of the first eccentric wheel, its edge portion will apply pressure to the first control valve 7 at a specific angle. Similarly, the second eccentric wheel 6 will also contact the second control valve 8 at the appropriate time, applying pressure to it.

[0034] Taking the first control valve 7 as an example, its structure includes a rocker arm bracket, a rocker arm 71, a clamping part, and a control valve body. When the first eccentric wheel 5 applies pressure to the clamping part of the rocker arm 71, the rocker arm 71 presses down, causing the clamping part at its end to squeeze the valve core inside the control valve body. The valve core overcomes the pressure of the spring and disengages from the sealing valve seat, thereby opening the passage and allowing gas to flow. A similar process occurs in the second control valve 8, triggered by the second eccentric wheel 6.

[0035] When the first eccentric wheel 5 or the second eccentric wheel 6 no longer applies pressure to the corresponding control valve, the spring inside the control valve will push the valve core back to its original position, re-engage with the sealing valve seat, and close the air passage.

[0036] The first control valve 7 and the second control valve 8 have the same structure. The clamping portions of the first control valve 7 and the second control valve 8 are in opposite positions; for example, one is on the left and the other on the right. Because the clamping portions are located on different sides of the control valves (one on the left and one on the right), the two eccentric wheels also need to be arranged in different positions accordingly, and their protrusions should face the clamping portion of their corresponding control valves.

[0037] The first control valve 7 and the second control valve 8 are existing devices well known to those skilled in the art, so their principles will not be described in detail.

[0038] The nitrogen end base 3 has a connection hole 31 for connecting an external gas source and a gas outlet. The first control valve 7 and the second control valve 8 are respectively connected to the external gas source and the gas outlet. Because the first control valve 7 and the second control valve 8 are directly connected to the external gas source and the gas outlet, real-time adjustment of the gas flow rate can be achieved. This design helps improve the response speed of the entire system and meets the requirements for precise gas flow control in different application scenarios.

[0039] One valve controls air intake, and the other controls air output. The operating states of the first control valve 7 and the second control valve 8 are mutually exclusive; that is, the operating state is either air intake or air output.

[0040] The valve core includes a cylindrical portion 712 and an elongated portion 711. The cylindrical portion 712 is movably embedded in the clamping portion, and the end of the elongated portion 711 abuts against the adjusting bolt 73. The adjusting bolt 73 is threadedly connected to the rocker arm 71. By turning the adjusting bolt 73, the axial extension length of the elongated portion 711 is changed, thereby adjusting the preload position of the cylindrical portion 712 relative to the clamping portion.

[0041] The axial extension length of the elongated portion 711 can be changed by turning the adjusting bolt 73, thereby fine-tuning the position of the cylindrical portion 712 relative to the clamping portion. Users can adjust the preload position of the valve core according to actual needs, ensuring that the valve achieves optimal opening and closing performance under different operating conditions.

[0042] Adjustment holes 11 are provided on both sides of the outer casing 1. The positions of the adjustment holes 11 correspond to the positions of the adjustment bolts 73, so that the adjustment bolts 73 can be adjusted without disassembling the outer casing 1.

[0043] The clamping part is a V-shaped groove with an opening width greater than the diameter of the cylindrical part 712. This ensures that the valve core can move freely under appropriate pressure while providing sufficient space to avoid unnecessary friction or jamming.

[0044] The fixture 2 is provided with a positioning groove 21, which cooperates with the output end of the drive mechanism 4.

[0045] The fixture 2 is provided with scale lines. For example, the first scale line corresponds to the open position of the first control valve 7, the second scale line corresponds to the closed position of the two valves, and the third scale line corresponds to the open position of the second control valve 8.

[0046] The scale lines are located on fixture 2, allowing operators to directly observe changes in the valve's status, such as its intake or exhaust status. This provides real-time feedback, enabling operators to immediately understand whether the valve is opening or closing as expected, thus enhancing the visibility of the operation.

[0047] When the drive mechanism is not in operation, fixture 2 can be manually moved to change the working condition. The scale lines provide the user with an intuitive reference, making it easy to manually adjust the fixture to the desired position. This not only improves the accuracy of operation but also simplifies the manual adjustment process.

[0048] In use, when the drive mechanism 4 starts working, it drives the shaft to rotate. As the shaft rotates, the first eccentric wheel 5 and the second eccentric wheel 6 mounted on it also rotate.

[0049] The first eccentric wheel 5 or the second eccentric wheel 6 will contact the corresponding control valve (i.e., the first control valve 7 or the second control valve 8) at a specific position, thereby opening the corresponding air passage.

[0050] Specifically, when the first eccentric wheel 5 presses down on the rocker arm 71, the valve core of the control valve body overcomes the spring pressure and disengages from the sealing valve seat, opening the passage; similarly, the second eccentric wheel 6 performs the same operation when acting on the second control valve 8. The fixture 2 is equipped with scale lines to provide an intuitive operational reference.

[0051] Depending on the process steps or specific requirements, the first control valve 7 and the second control valve 8 can be replaced with pinch valves, and the system's operating logic can be adjusted so that these pinch valves remain open under normal conditions, while the valves are closed via the first eccentric wheel 5 and the second eccentric wheel 6. It is necessary to ensure that the eccentric wheels can accurately apply closing pressure to the pinch valves.

[0052] It should be noted that the drive mechanism 4, the first control valve 7, and the second control valve 8 in this embodiment are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0053] The present invention has been described above by way of example, but the present invention is not limited to the specific embodiments described above. Any modifications or variations made based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A cold pump air volume adjusting device, characterized by: Includes a housing (1), a fixture (2), a nitrogen end base (3), a drive mechanism (4), a first control valve (7), and a second control valve (8); The drive mechanism (4) is located inside the housing (1). The output end of the drive mechanism (4) is connected to the fixture (2) via a rotating shaft. A first eccentric wheel (5) and a second eccentric wheel (6) are mounted on the rotating shaft. A nitrogen end base (3) is fixed to the housing (1). A first control valve (7) and a second control valve (8) are installed on the nitrogen end base (3). The first control valve (7) and the second control valve (8) are used to control independent gas passages. When the drive mechanism (4) rotates, the first eccentric wheel (5) actuates the first control valve (7) to open its corresponding gas passage, or the second eccentric wheel (6) actuates the second control valve (8) to open its corresponding gas passage.

2. A cold pump flow regulating device according to claim 1, characterized in that: Both the first control valve (7) and the second control valve (8) are normally closed valves.

3. A cold pump flow regulating device according to claim 2, characterized in that: The first control valve (7) includes a swing arm bracket, a swing arm (71) and a control valve body; the swing arm (71) is hinged on the swing arm bracket, and a clamping part is provided at the end of the swing arm (71). The control valve body is disposed between the clamping parts. When the first eccentric wheel (5) presses down on the swing arm (71), the valve core of the control valve body overcomes the spring pressure and disengages from the sealing valve seat to open the passage.

4. A cold pump flow regulating device according to claim 3, characterized in that: The valve core includes a cylindrical part (712) and an elongated part (711). The cylindrical part (712) is movably embedded in the clamping part, and the end of the elongated part (711) abuts against the adjusting bolt (73). The adjusting bolt (73) is threadedly connected to the rocker arm (71). By turning the adjusting bolt (73), the axial extension length of the elongated part (711) is changed, thereby adjusting the preload position of the cylindrical part (712) relative to the clamping part.

5. A cold pump gas volume regulating device according to claim 4, characterized in that: The clamping part is a V-shaped groove, and its opening width is greater than the diameter of the cylindrical part (712).

6. A cold pump flow regulating device according to claim 1, characterized in that: The fixture (2) is provided with a positioning groove (21), which is engaged with the output end of the drive mechanism (4).

7. A cold pump flow regulating device according to claim 6, characterized in that: The fixture (2) is provided with scale lines.

8. A cold pump flow regulating device according to claim 1, characterized in that: The nitrogen end base (3) has a connection hole (31) for connecting an external gas source and a gas outlet. The first control valve (7) and the second control valve (8) are respectively connected to the external gas source and the gas outlet.

9. A cold pump flow regulating device according to claim 4, characterized in that: Adjustment holes (11) are provided on both sides of the outer casing (1), and the position of the adjustment holes (11) corresponds to the position of the adjustment bolts (73).

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