Vacuum air intake control device with active check and volume adjustment functions

Abstract

The utility model provides a vacuum air intake control device with active check and capacity adjustment function relates to vacuum air intake control equipment technical field. Including top cover, the bottom of top cover is installed with base, the top of top cover is equipped with air inlet, through setting top cover and base, connecting pipe no. Two are used for connecting second internal cavity and third internal cavity, second two position three way valves are used for controlling connecting pipe no. Two open and close, thereby guaranteeing that second internal cavity communicates third internal cavity or communicates atmosphere, can access vacuum pump air inlet end through series connection mode, simple and practical structure, low in cost, can avoid the hidden danger of motor equipment excessive superpower, super torque under the premise of not increasing motor equipment power and torque, improve the pumping efficiency of vacuum pump, realize the active stop function of shutdown, can access vacuum pump air inlet end through series connection mode, simple and practical structure, low in cost, can improve the pumping efficiency of vacuum pump under the premise of not increasing motor equipment power and torque.

Description

Technical Field

[0001] This utility model relates to the technical field of vacuum intake control equipment, and in particular to a vacuum intake control device with active check and capacity adjustment functions. Background Technology

[0002] Most vacuum pumps on the market currently use two types of intake valves. One type is a mechanical rod-type intake valve, which limits the intake volume under low vacuum. It requires operators to have a high level of technical skill during factory commissioning, and improper operation or modification in the later stage can cause overload and burn out the motor. The other type is a self-priming adjustable load capacity intake valve, which does not require complicated factory commissioning, but it is lacking in terms of active check and automatic check when stopping.

[0003] Meanwhile, the shaft power and torque required for vacuum pumping are directly proportional to the air concentration in the confined space. As air is removed, the air concentration decreases, corresponding to an increase in vacuum level, and the required shaft power and torque continuously decrease. This process follows a certain regular curve relationship. When starting a vacuum pump under standard atmospheric pressure conditions, the high air concentration in the initial stage often leads to motor over-power and over-torque situations. This situation has a significant impact on the damage and lifespan of the motor equipment, and even a huge impact on safety, and must be avoided as much as possible. To solve this problem, the traditional approach is to use a higher-grade motor to obtain higher motor shaft power and torque. However, the traditional approach has the problems of high cost and serious energy waste.

[0004] Therefore, this utility model provides a vacuum intake control device with active check and capacity regulation functions. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies and provide a vacuum intake control device with active check and capacity regulation functions. This device can be connected in series to the vacuum pump intake end, has a simple and practical structure, and is low in cost. It can improve the pumping efficiency of the vacuum pump and achieve active stop function when the machine stops without increasing the power and torque of the motor equipment.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a vacuum intake control device with active check valve and capacity regulation functions, including a top cover,

[0007] A base is installed at the bottom of the top cover, and an air inlet is opened at the top of the top cover. A first two-position two-way valve is fixedly connected to the top of the air inlet.

[0008] The top cover has a first internal cavity, and a lower pressure plate is installed inside the first internal cavity. A connecting plate is installed below the lower pressure plate. The base has a third internal cavity, and a valve plate is installed inside the third internal cavity. A connecting rod is fixedly connected between the valve plate and the connecting plate. The connecting rod is used to connect the valve plate and the connecting plate. A sealing diaphragm is installed above the connecting plate and the lower pressure plate. The top of the connecting plate and the lower pressure plate is used to fix the sealing diaphragm. The sealing diaphragm is used to divide the space below the top cover and the upper part of the base into two independent cavities: the first internal cavity and the second internal cavity. The second internal cavity is located below the first internal cavity.

[0009] An upper pressure plate is installed inside the top cover and below the first adjusting bolt. A spring is installed between the upper pressure plate and the connecting plate. The spring is used to control the opening and closing of the valve plate. The bottom of the spring is connected to the connecting plate through the third adjusting bolt.

[0010] A fourth internal cavity is provided inside the base and below the valve plate. A third internal cavity is provided inside the top cover and below the lower pressure plate. A connecting pipe is fixedly connected to the outside of the top cover and the base. One end of the connecting pipe extends into the first internal cavity, and the other end of the connecting pipe extends into the fourth internal cavity. The connecting pipe is mainly used to connect the first internal cavity and the fourth internal cavity.

[0011] In a preferred embodiment, the top of the top cover has a threaded hole, and a first adjusting bolt extending to the top of the top cover is threaded into the inner thread of the threaded hole. A locking nut is fitted on the outer side of the first adjusting bolt and on the top of the top cover. The bottom of the first adjusting bolt is used to limit the upper pressure plate. The first adjusting bolt is installed in the threaded hole of the top cover and fixed in position by the locking nut. A first two-position two-way valve is installed at the air inlet of the top cover and is used to control the communication between the first internal cavity inside the top cover and the atmosphere through a threaded connection. A throttle valve is fixedly connected to the outer side of the first connecting pipe, which is mainly used to control the opening and closing of the first connecting pipe, thereby ensuring throttling between the first internal cavity and the fourth internal cavity. A second connecting pipe is fixedly connected to the outer side of the top cover and on one side of the first connecting pipe. One end of the second connecting pipe extends into the second internal cavity, and the other end extends into the third internal cavity. The second connecting pipe is used to connect the second internal cavity and the third internal cavity. A second two-position three-way valve is fixedly connected to the outer side of the second connecting pipe, which is used to control the opening and closing of the second connecting pipe, thereby ensuring that the second internal cavity is connected to the third internal cavity or to the atmosphere.

[0012] In a preferred embodiment, both the top cover and the base are integrally formed by metallic casting. The top of the top cover is threaded with symmetrically distributed second adjusting bolts that extend to the inner wall of the base. The second adjusting bolts are used to fix the top cover and the base together, improving the stability of the connection between the top cover and the base. A valve seat is installed at the bottom of the base. An external conveying pipe is installed on one side of the top cover. An external connecting channel is installed on one side of the external conveying pipe. The external connecting channel and the valve seat are used to connect the entire equipment to the external pipe through both sides, thereby facilitating subsequent operations.

[0013] In a preferred embodiment, a sealing gasket is fitted between the outer connecting channel and the external conveying pipe. The sealing gasket is used to provide auxiliary sealing when the outer connecting channel and the external conveying pipe are connected. The valve plate is made of metal chips to ensure the accuracy of the capacity adjustment and is used to control the opening and closing of the air intake valve. The connecting rod is made of metal chips.

[0014] In a preferred embodiment, a control panel is installed on one side of the outer connecting channel. The first two-position two-way valve, the throttle valve, and the second two-position three-way valve are all electrically connected to the control panel. The control panel is used to control the operation of the first two-position two-way valve, the throttle valve, and the second two-position three-way valve, thereby realizing unified management of the power equipment.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] By setting a top cover and a base, a spring is used to control the opening and closing of the valve plate. The bottom of the spring is connected to the connecting plate via a third adjusting bolt. Connector one is mainly used to connect the first internal cavity and the fourth internal cavity. The bottom of the first adjusting bolt is used to limit the upper pressure plate. The first adjusting bolt is installed in the threaded hole of the top cover and fixed in position by a lock nut. A first two-position two-way valve is installed at the air inlet of the top cover. The threaded connection structure is used to control the communication between the first internal cavity inside the top cover and the atmosphere. A throttle valve is mainly used to control the opening and closing of connector one, thereby ensuring throttling between the first and fourth internal cavities. Connector two is used for... Connecting the second and third internal cavities, the second two-position three-way valve controls the opening and closing of the second connecting pipe, thereby ensuring that the second internal cavity is connected to the third internal cavity or to the atmosphere. It can be connected to the vacuum pump inlet in series. The structure is simple, practical, and low-cost. Without increasing the power and torque of the motor equipment, it avoids the hidden dangers of excessive power and torque of the motor equipment, improves the pumping efficiency of the vacuum pump, and realizes the automatic stop function when stopping. It can be connected to the vacuum pump inlet in series. The structure is simple, practical, and low-cost. It can improve the pumping efficiency of the vacuum pump without increasing the power and torque of the motor equipment. Attached Figure Description

[0017] Figure 1A three-dimensional view of the overall structure of a vacuum intake control device with active check and capacity regulation functions provided by this utility model;

[0018] Figure 2 A schematic diagram of the internal structure of a vacuum intake control device with active check and capacity regulation functions provided by this utility model;

[0019] Figure 3 A schematic diagram illustrating the overall structure and working principle of a vacuum intake control device with active check and capacity regulation functions provided by this utility model.

[0020] Figure 4 An exploded view of the overall structure and installation of a vacuum intake control device with active check valve and capacity regulation function provided by this utility model.

[0021] Legend:

[0022] 1. First adjusting bolt;

[0023] 2. Tighten the nut;

[0024] 3. First and second position two-way valves;

[0025] 4. Top cover;

[0026] 5. Base; 51. First internal cavity; 52. Second internal cavity; 53. Third internal cavity; 54. Fourth internal cavity;

[0027] 6. Valve plate;

[0028] 7. Connecting rod;

[0029] 8. Connecting plate;

[0030] 9. Lower pressure plate;

[0031] 10. Second adjusting bolt; 11. Sealing diaphragm; 12. Spring; 13. Upper pressure plate; 14. Connecting pipe one; 15. Connecting pipe two; 16. Throttling valve; 17. Second two-position three-way valve; 18. Valve seat; 19. External connecting channel; 20. Sealing gasket; 21. External conveying pipeline. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] like Figures 1-3As shown, this embodiment provides a technical solution: a vacuum air intake control device with active check and capacity regulation function, including a top cover 4, a base 5 installed at the bottom of the top cover 4, an air intake port opened at the top of the top cover 4, and a first two-position two-way valve 3 fixedly connected to the top of the air intake port.

[0034] In this design, the top cover 4 has a first internal cavity 51 inside, a lower pressure plate 9 is installed inside the first internal cavity 51, a connecting plate 8 is installed below the lower pressure plate 9, the base 5 has a third internal cavity 53 inside, a valve plate 6 is installed inside the third internal cavity 53, a connecting rod 7 is fixedly connected between the valve plate 6 and the connecting plate 8, the connecting rod 7 is used to connect the valve plate 6 and the connecting plate 8, a sealing diaphragm 11 is installed above the connecting plate 8 and the lower pressure plate 9, the top of the connecting plate 8 and the lower pressure plate 9 is used to fix the sealing diaphragm 11, the sealing diaphragm 11 is used to divide the space below the top cover 4 and the upper part of the base 5 into two independent cavities, the first internal cavity 51 and the second internal cavity 52, the second internal cavity 52 is located below the first internal cavity 51;

[0035] In this scheme, an upper pressure plate 13 is installed inside the top cover 4 and below the first adjusting bolt 1. A spring 12 is installed between the upper pressure plate 13 and the connecting plate 8. The spring 12 is used to control the opening and closing of the valve plate 6. The bottom of the spring 12 is connected to the connecting plate 8 through the third adjusting bolt.

[0036] In this design, a fourth internal cavity 54 is provided inside the base 5 and below the valve plate 6, and a third internal cavity 53 is provided inside the top cover 4 and below the lower pressure plate 9. A connecting pipe 14 is fixedly connected to the outside of the top cover 4 and the base 5. One end of the connecting pipe 14 extends into the first internal cavity 51, and the other end of the connecting pipe 14 extends into the fourth internal cavity 54. The connecting pipe 14 is mainly used to connect the first internal cavity 51 and the fourth internal cavity 54.

[0037] Going a step further, such as Figures 1-4 As shown: In this scheme, the top of the top cover 4 is provided with a threaded hole, and the threaded hole is connected to the first adjusting bolt 1 extending to the top of the top cover 4. The outside of the first adjusting bolt 1 and located on the top of the top cover 4 is fitted with a locking nut 2. The bottom of the first adjusting bolt 1 is used to limit the upper pressure plate 13. The first adjusting bolt 1 is installed in the threaded hole of the top cover 4 and fixed in position by the locking nut 2. The first two-position two-way valve 3 is installed at the air inlet of the top cover 4 and is used to control the communication between the first internal cavity 51 inside the top cover 4 and the atmosphere through the threaded connection structure.

[0038] Going a step further, such as Figures 1-4As shown: In this scheme, a throttle valve 16 is fixedly connected to the outside of pipe 14. The throttle valve 16 is mainly used to control the opening and closing of pipe 14, thereby ensuring throttling when connecting the first internal cavity 51 and the fourth internal cavity 54. Pipe 2 15 is fixedly connected to the outside of the top cover 4 and to one side of pipe 14. One end of pipe 2 15 extends into the inside of the second internal cavity 52, and the other end of pipe 2 15 extends into the inside of the third internal cavity 53. Pipe 2 15 is used to connect the second internal cavity 52 and the third internal cavity 53. A second two-position three-way valve 17 is fixedly connected to the outside of pipe 2 15. The second two-position three-way valve 17 is used to control the opening and closing of pipe 2 15, thereby ensuring that the second internal cavity 52 is connected to the third internal cavity 53 or to the atmosphere.

[0039] In this scheme, a control panel is installed on one side of the outer connecting channel 19. The first two-position two-way valve 3, the throttle valve 16, and the second two-position three-way valve 17 are all electrically connected to the control panel. The control panel is used to control the operation of the first two-position two-way valve 3, the throttle valve 16, and the second two-position three-way valve 17, thereby realizing the unified management of power equipment.

[0040] Going a step further, such as Figures 1-4 As shown, in this scheme, both the top cover 4 and the base 5 are integrally formed by metal casting. The top of the top cover 4 is threaded with symmetrically distributed second adjusting bolts 10 that extend to the inner wall of the base 5. The second adjusting bolts 10 are used to fix the top cover 4 and the base 5, which improves the stability when the top cover 4 and the base 5 are connected.

[0041] In this scheme, a valve seat 18 is installed at the bottom of the base 5, an external conveying pipe 21 is installed on one side of the top cover 4, and an external connecting channel 19 is installed on one side of the external conveying pipe 21. The external connecting channel 19 and the valve seat 18 are used to connect the entire equipment to the external pipes on both sides, so as to cooperate with subsequent operations.

[0042] In this scheme, a sealing gasket 20 is fitted between the outer connecting channel 19 and the external conveying pipe 21. The sealing gasket 20 is used to provide auxiliary sealing when the outer connecting channel 19 and the external conveying pipe 21 are connected. The valve plate 6 is made of metal chips to ensure the capacity adjustment accuracy and is used to control the opening and closing of the air intake valve. The connecting rod 7 is made of metal chips.

[0043] Working principle:

[0044] like Figures 1-4 As shown:

[0045] By setting up a top cover 4 and a base 5, the outer control panel can be opened during operation to uniformly control the electrical equipment. A connecting rod 7 connects the valve plate 6 and the connecting plate 8. A sealing diaphragm 11 divides the space below the top cover 4 and above the base 5 into two independent cavities: a first internal cavity 51 and a second internal cavity 52. ​​The second internal cavity 52 is located below the first internal cavity 51. A spring 12 controls the opening and closing of the valve plate 6. The bottom of the spring 12 is connected to the connecting plate 8 via a third adjusting bolt. A connecting pipe 14 mainly connects the first internal cavity 51 and the fourth internal cavity 54. The bottom of the first adjusting bolt 1 is used to align with the upper... The pressure plate 13 provides a limiting mechanism. The first adjusting bolt 1 is installed in the threaded hole of the top cover 4 and fixed in position by the lock nut 2. The first two-position two-way valve 3 is installed at the air inlet of the top cover 4. The threaded connection structure is used to control the connection between the first internal cavity 51 inside the top cover 4 and the atmosphere. The throttle valve 16 is mainly used to control the opening and closing of the first connecting pipe 14, thereby ensuring throttling when connecting the first internal cavity 51 and the fourth internal cavity 54. The second connecting pipe 15 is used to connect the second internal cavity 52 and the third internal cavity 53. The second two-position three-way valve 17 is used to control the opening and closing of the second connecting pipe 15, thereby ensuring that the second internal cavity 52 is connected to the third internal cavity 53 or to the atmosphere. A control panel is installed on one side of the outer connecting channel 19. The first two-position two-way valve 3, the throttle valve 16, and the second two-position three-way valve 17 are all electrically connected to the control panel. The control panel is used to control the operation of the first two-position two-way valve 3, the throttle valve 16, and the second two-position three-way valve 17, realizing unified management of electrical equipment. The second adjusting bolt 10 is used to fix the top cover 4 and the base 5, improving the stability of the connection between the top cover 4 and the base 5. The outer connecting channel 19 and the valve seat 18 are used to connect the entire equipment to external pipelines through both sides, thereby facilitating subsequent operations. The sealing gasket 20 is used to seal the connection between the outer connecting channel 19 and the external... When connecting the conveying pipe 21, auxiliary sealing treatment is performed. The valve plate 6 is made of metal chips to ensure the accuracy of capacity adjustment and is used to control the opening and closing of the air inlet valve. The connecting rod 7 is made of metal chips and can be connected to the air inlet of the vacuum pump in series. The structure is simple, practical and low cost. It can avoid the hidden danger of excessive power and torque of the motor equipment without increasing the power and torque of the motor equipment, improve the pumping efficiency of the vacuum pump and realize the automatic stop function when stopping. It can be connected to the air inlet of the vacuum pump in series. The structure is simple, practical and low cost. It can improve the pumping efficiency of the vacuum pump without increasing the power and torque of the motor equipment.

[0046] Actual operating procedure:

[0047] 1. Power-on state: The first two-position two-way valve 3 is de-energized, and the first internal cavity 51 is connected to the atmosphere. The second two-position three-way valve 17 is de-energized, and the second internal cavity 52 and the third internal cavity 53 are connected. The first internal cavity 51 is at atmospheric pressure, and the second internal cavity 52 and the third internal cavity 53 are at atmospheric pressure. The forces cancel each other out and remain closed under the action of elasticity.

[0048] 2. Loading State: The main unit is running. The first two-position two-way valve 3 is energized, disconnecting the first internal cavity 51 from the atmosphere. The second two-position three-way valve 17 is energized, disconnecting the second internal cavity 52 and the third internal cavity 53. The second internal cavity 52 is connected to the atmosphere. Initially, the first internal cavity 51, the second internal cavity 52, and the third internal cavity 53 are at atmospheric pressure, while the fourth internal cavity 54 is under negative pressure. The pressure difference between the first internal cavity 51 and the fourth internal cavity 54 gradually becomes negative, and the pressure difference gradually overcomes the spring force, gradually opening the valve. Because the valve plate 6 has a capacity adjustment curve profile, it limits the air intake under low vacuum, realizing automatic capacity adjustment of the air intake and solving the problem of excessive power and torque of the motor equipment. After the main unit has been running for a period of time, the second internal cavity 52 is at atmospheric pressure, and the first internal cavity 51, the third internal cavity 53, and the fourth internal cavity 54 are under negative pressure, maintaining the open position.

[0049] 3. Unloading state: When the equipment reaches the set unloading conditions, the first two-position two-way valve 3 is de-energized, the first internal cavity 51 is connected to the atmosphere, the second two-position three-way valve 17 is de-energized, the second internal cavity 52 and the third internal cavity 53 are connected, the first internal cavity 51 switches from negative pressure to positive pressure and switches from negative pressure to positive pressure and the second internal cavity 52 switches from positive pressure to negative pressure. The pressure difference between A and B plus the spring force causes the valve to close quickly, realizing the active check function.

[0050] 4. Shutdown state: The main unit stops rotating, the first two-position two-way valve 3 is de-energized, the first internal cavity 51 is connected to the atmosphere, the second two-position three-way valve 17 is de-energized, the second internal cavity 52 and the third internal cavity 53 are connected, the first internal cavity 51 and the fourth internal cavity 54 are at atmospheric pressure, the second internal cavity 52 and the third internal cavity 53 are at negative pressure, the pressure difference between A and B plus the spring force keeps the valve closed.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A vacuum intake control device with active check valve and capacity regulation function, comprising a top cover (4), characterized in that, The bottom of the top cover (4) is equipped with a base (5), and the top of the top cover (4) is provided with an air inlet. The top of the air inlet is fixedly connected with a first two-position two-way valve (3). The top cover (4) has a first internal cavity (51) inside, a lower pressure plate (9) is installed inside the first internal cavity (51), a connecting plate (8) is installed below the lower pressure plate (9), the base (5) has a third internal cavity (53) inside, a valve plate (6) is installed inside the third internal cavity (53), and a sealing diaphragm (11) is installed above the connecting plate (8) and the lower pressure plate (9). The sealing diaphragm (11) is used to divide the space below the top cover (4) and above the base (5) into two independent cavities: the first internal cavity (51) and the second internal cavity (52). An upper pressure plate (13) is installed inside the top cover (4) and below the first adjusting bolt (1), and a spring (12) is installed between the upper pressure plate (13) and the connecting plate (8). A fourth internal cavity (54) is provided inside the base (5) and below the valve plate (6). A third internal cavity (53) is provided inside the top cover (4) and below the lower pressure plate (9). A connecting pipe (14) is fixedly connected to the outside of the top cover (4) and the base (5). One end of the connecting pipe (14) extends into the first internal cavity (51), and the other end of the connecting pipe (14) extends into the fourth internal cavity (54).

2. The vacuum intake control device with active check and capacity regulation function according to claim 1, characterized in that: A connecting rod (7) is fixedly connected between the valve plate (6) and the connecting plate (8). A threaded hole is provided on the top of the top cover (4). A first adjusting bolt (1) extending to the top of the top cover (4) is threaded inside the threaded hole. A locking nut (2) is fitted on the outside of the first adjusting bolt (1) and on the top of the top cover (4). The bottom of the first adjusting bolt (1) is used to limit the upper pressure plate (13).

3. The vacuum intake control device with active check and capacity regulation function according to claim 2, characterized in that: A throttle valve (16) is fixedly connected to the outside of the first connector (14). A second connector (15) is fixedly connected to the outside of the top cover (4) and to one side of the first connector (14). One end of the second connector (15) extends into the second internal cavity (52), and the other end of the second connector (15) extends into the third internal cavity (53). The second connector (15) is used to connect the second internal cavity (52) and the third internal cavity (53). A second two-position three-way valve (17) is fixedly connected to the outside of the second connector (15).

4. The vacuum intake control device with active check and capacity regulation function according to claim 3, characterized in that: The top of the top cover (4) is threaded with second adjusting bolts (10) that are symmetrically distributed and extend to the inner wall of the base (5). The second adjusting bolts (10) are used to fix the top cover (4) and the base (5) together.

5. The vacuum intake control device with active check and capacity regulation function according to claim 4, characterized in that: A valve seat (18) is installed at the bottom of the base (5), an external conveying pipe (21) is installed on one side of the top cover (4), and an external connecting channel (19) is installed on one side of the external conveying pipe (21).

6. The vacuum intake control device with active check and capacity regulation function according to claim 5, characterized in that: A sealing gasket (20) is fitted between the outer connecting channel (19) and the external conveying pipe (21). The sealing gasket (20) is used to seal the connection between the outer connecting channel (19) and the external conveying pipe (21).

7. The vacuum intake control device with active check and capacity regulation function according to claim 3, characterized in that: A control panel is installed on one side of the outer connecting channel (19), and the first two-position two-way valve (3), the throttle valve (16), and the second two-position three-way valve (17) are all electrically connected to the control panel.

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