Energy-saving vacuum generator

Abstract

The utility model relates to the technical field of vacuum generators, in particular to an energy-saving vacuum generator which comprises a shell with an air source inlet, an air inlet valve, a vacuum generating assembly, a vacuum adjusting assembly, a first air path and a second air path are arranged in the shell, the air inlet valve is connected with the first air path and the second air path at the same time, and the vacuum generating assembly is connected with the vacuum adjusting assembly. The vacuum generating assembly comprises a vacuum generating cavity with an air inlet hole, the air inlet hole can be communicated with the first air path through the air inlet valve, and the vacuum adjusting assembly can close the air inlet valve through the second air path so that air path communication between the air inlet hole and the first air path can be cut off. According to the energy-saving vacuum generator, due to the effect of mechanically controlling and adjusting negative pressure, air supply can be stopped when the vacuum degree reaches a set value, intermittent air supply due to long-time adsorption can be achieved, more than 99% of air source is saved, and the energy-saving vacuum generator can adapt to various working conditions and is particularly suitable for grabbing workpieces with small discharge amount.

Description

Technical Field

[0001] The utility model relates to the technical field of vacuum generators, and more specifically, to an energy-saving vacuum generator. Background Art

[0002] The vacuum generator is an efficient, clean, economical and small vacuum component that uses a positive pressure gas source to generate negative pressure. This makes it very easy and convenient to obtain negative pressure in places where compressed air is available, or in places where positive and negative pressures are required at the same time in a pneumatic system. Vacuum generators are widely used in the fields of machinery, electronics, packaging, printing, plastics and robots in industrial automation, especially in combination with suction cups and other structures to adsorb and transport various materials. They are especially suitable for adsorbing fragile, soft, thin non-ferrous and non-metallic materials or spherical objects.

[0003] Most existing vacuum generators use solenoid valves with pressure sensors to control the switch of the vacuum generator, which requires the cooperation of the power system, consumes a lot of energy, and uses relatively more electronic control components, which increases the failure rate of the product. In addition, the vacuum generator needs to be continuously supplied with gas during operation, but in applications similar to the above, the required air extraction volume is small, the vacuum degree requirement is not high, and intermittent operation is possible. If such a vacuum generator is used in a long-term operation site, a large amount of gas will be wasted. Utility Model Content

[0004] The utility model provides an energy-saving vacuum generator which utilizes mechanical control to adjust negative pressure. When the vacuum degree reaches a set value, the gas supply can be stopped, so that long-term adsorption can be achieved with intermittent gas supply, thus saving gas source.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] An energy-saving vacuum generator is provided, comprising a shell with an air source inlet, wherein an air intake valve, a vacuum generating assembly, a vacuum regulating assembly, a first air path and a second air path are arranged in the shell, wherein the first air path is connected to the air source inlet, and the air intake valve is connected to the first air path and the second air path at the same time, and the vacuum generating assembly comprises a vacuum generating chamber with an air intake hole, wherein the air intake hole can be connected to the first air path through the air intake valve, and the vacuum regulating assembly can close the air intake valve through the second air path, so that the air intake hole is disconnected from the air path connection of the first air path.

[0007] Further, the vacuum regulating assembly includes a valve seat rotatably arranged in the shell, a first elastic member, a first valve core, a second elastic member and a ejector pin, the first elastic member is arranged in the valve seat, the valve seat is movably arranged in the shell along the direction of expansion and contraction of the first elastic member, the first valve core is fixed in the shell, and a valve cavity connected to the second air path is provided in the first valve core, the second elastic member is sleeved on one end of the ejector pin and arranged in the valve cavity, and the other end of the ejector pin is fixedly connected to the valve seat; the valve cavity is connected to the air intake valve through the second air path, and when the valve seat is rotated to move the valve seat in the direction of compression of the first elastic member, the ejector pin compresses the second elastic member, and the air intake valve can be closed through the second air path.

[0008] Furthermore, the valve seat includes a valve seat body and a base with a convex column, the outer wall of the valve seat body is provided with a threaded structure, and the valve seat body can be rotatably arranged in the shell; one end of the first elastic member is sleeved on the convex column, and the other end is tightly pressed against the inner wall of the valve seat body, and the valve seat body is sleeve-connected with the base; the base is fixedly connected with the ejector pin; the base can move along the direction of extension and contraction of the first elastic member as the valve seat body rotates, so that the ejector pin acts on the second elastic member.

[0009] Preferably, the vacuum regulating assembly further comprises a limit rod fixed in the housing, the limit rod is located between the base and the first valve core, and the limit rod is arranged at a stroke end point of the base.

[0010] Furthermore, the air inlet valve includes a first valve body provided with a first cavity, a closing structure and a second valve body provided with a second cavity, the first inlet of the first cavity is connected to the first air path, the air inlet hole of the vacuum generating cavity is connected to the first cavity through the first outlet of the first cavity, the second inlet of the second cavity is connected to the second air path, and the closing structure is movably arranged at the second outlet of the second cavity; the vacuum adjustment assembly can move the closing structure from the second outlet to the first outlet through the second air path, and when the closing structure is located at the first outlet, the air inlet hole is disconnected from the air path of the first cavity, and at this time, the second outlet is connected to the air inlet hole.

[0011] As an improvement, the energy-saving vacuum generator also includes a vacuum breaking component and a third air path. The vacuum breaking component is provided with a vacuum breaking hole connected to the outside of the shell, and both ends of the third air path are respectively connected to the vacuum breaking component and the vacuum generating chamber.

[0012] Optionally, the vacuum generating chamber further comprises a vacuum hole, and a pressure-maintaining diaphragm is provided at the vacuum hole.

[0013] Optionally, the vacuum generating assembly further includes a muffler connected to the vacuum generating chamber.

[0014] Preferably, the shell includes a first shell, a second shell and a third shell that are assembled together, the air intake valve is arranged in the second shell and partially extends to the first shell, the first air path is formed in the first shell, the vacuum generating assembly is arranged in the second shell, the vacuum adjusting assembly is arranged on the third shell and partially extends to the first shell, and a sealing gasket is provided on the transition surface between the first shell and the third shell, and the second air path is formed through the first shell and the second shell.

[0015] Optionally, the third shell is further provided with a detection hole, and the detection hole can be connected to the air path of the vacuum generating chamber.

[0016] Compared with the prior art, the energy-saving vacuum generator of the utility model is provided with a vacuum generating component and a vacuum regulating component at the same time, and is connected through the first gas path and the second gas path respectively, and uses a multi-directional control of an air inlet valve at the same time. The regulating function of the vacuum regulating component acts on the air inlet valve through the second gas path to realize the opening and closing between the vacuum generating component and the first gas path. The whole process only needs to be realized by the mechanical device of the generator, and no additional electronic control equipment is required. When the vacuum degree of the energy-saving vacuum generator reaches the set value, the gas supply can be stopped. If a negative pressure leak occurs, the vacuum regulating component can be used to adjust or refill the gas, that is, the intermittent gas supply of the gas source can be realized. Due to the function of mechanical control to adjust the negative pressure, the energy-saving vacuum generator can save more than 99% of the gas source in a long-term adsorption state, can adapt to a variety of working conditions, and is particularly suitable for grasping workpieces with small leakage flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional diagram of an energy-saving vacuum generator in one embodiment of the utility model.

[0018] Figure 2 It is an overall schematic diagram of an energy-saving vacuum generator in one embodiment of the utility model.

[0019] Figure 3 for Figure 2 Schematic cross-sectional view of the main view.

[0020] Figure 4 Schematic diagram of a vacuum adjustment assembly in one embodiment of the utility model.

[0021] Figure 5 for Figure 2 Schematic cross-section of the center-rear view.

[0022] Figure 6 for Figure 2 Another cross-sectional diagram of the center rear view.

[0023] Figure 7It is a line graph of vacuum flow at various vacuum degrees in one embodiment of the utility model.

[0024] Figure 8 This is a broken line graph of the time at which each vacuum degree is achieved in one embodiment of the present utility model. DETAILED DESCRIPTION

[0025] The utility model is further described below in conjunction with specific implementation methods. Among them, the accompanying drawings are only used for exemplary descriptions, and only schematic diagrams are shown, not physical drawings, and cannot be understood as limitations on this patent; in order to better illustrate the embodiments of the utility model, some parts of the accompanying drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product. It should be understood that if the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside" and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, it is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only used for exemplary descriptions and cannot be understood as limitations on this patent. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0026] like Figures 1 to 8 The figure shows an embodiment of the energy-saving vacuum generator of the utility model. Figures 1 to 3 As shown, the energy-saving vacuum generator includes a shell 10, on which is provided an air source inlet 111, and in which are provided an air intake valve 20, a vacuum generating assembly 30, a vacuum regulating assembly 40, a first air path 50 and a second air path 60, wherein the first air path 50 is connected to the air source inlet 111, the air intake valve 20 is connected to the first air path 50 and the second air path 60 at the same time, the vacuum generating assembly 30 includes a vacuum generating chamber 31 with an air intake hole 311, the air intake hole 311 can be connected to the first air path 50 through the air intake valve 20, and the vacuum regulating assembly 40 can close the air intake valve 20 through the second air path 60, so that the air intake hole 311 is disconnected from the air path connection with the first air path 50.

[0027] In actual application, a positive pressure gas source is first input from the gas source inlet 111 on the shell 10, and the positive pressure gas source flows along the first gas path 50 and passes through the air inlet valve 20 to enter the vacuum generating chamber 31 to generate a vacuum. At this time, the air inlet valve 20 is kept open due to the high pressure of the positive pressure gas source, so that the vacuum generating chamber 31 is connected to the first gas path 50, and the vacuum regulating component 40 is connected to the vacuum generating component 30 gas path; when the vacuum degree in the vacuum generating chamber 31 reaches the set value (the pressure in the vacuum generating chamber 31 is equal to the pressure of the positive pressure gas source), the pressure in the vacuum regulating component 40 also reaches In the equilibrium state, the air inlet valve 20 is closed through the second air path 60, that is, the air path connection between the vacuum generating chamber 31 and the first air path 50 is cut off, the positive pressure air source stops supplying air, and the vacuum generating chamber 31 and the regulating chamber of the vacuum generating component 30 maintain a balanced negative pressure state; when the vacuum in the vacuum generating chamber 31 leaks, there is no need to supply air immediately within a small leakage flow range. At this time, the vacuum degree in the vacuum generating chamber 31 can be adjusted by adjusting the vacuum regulating component 40 until the leakage flow exceeds the required working range of the vacuum generating component 30, and then gas can be supplemented to continue to generate vacuum.

[0028] It should be noted that when the positive pressure gas source enters from the first gas path 50, in addition to most of the gas flowing to the vacuum generating component 30, a small part of the gas flow can also flow to the vacuum regulating component 40, so that the gas in its regulating chamber can also participate in the subsequent balancing effect; in addition, the vacuum regulating component 40 is connected to the vacuum generating component 30 through the gas path to ensure that the regulating function of the vacuum regulating component 40 is exerted.

[0029] The energy-saving vacuum generator of the utility model embodiment is provided with a vacuum generating component 30 and a vacuum regulating component 40, and is respectively connected through a first gas path 50 and a second gas path 60. At the same time, a multi-directional control of an air intake valve 20 is utilized, and the regulating function of the vacuum regulating component 40 acts on the air intake valve 20 through the second gas path 60, thereby realizing the opening and closing between the vacuum generating component 30 and the first gas path 50. The whole process only needs to be realized by the mechanical device of the generator, and no additional electronic control equipment is required. When the vacuum degree of the energy-saving vacuum generator reaches the set value, the gas supply can be stopped. If a negative pressure leakage occurs, the vacuum regulating component 40 can be used for adjustment or gas replenishment, that is, intermittent gas supply from the gas source can be realized.

[0030] like Figure 3 and Figure 4As shown, the vacuum adjustment assembly 40 includes a valve seat 41 rotatably arranged in the housing 10, a first elastic member 42, a first valve core 43, a second elastic member 44 and a ejector pin 45. The first elastic member 42 is arranged in the valve seat 41, and the valve seat 41 is movably arranged in the housing 10 along the direction of expansion and contraction of the first elastic member 42. The first valve core 43 is fixed in the housing 10, and a valve cavity 431 connected to the second gas path 60 is provided in the first valve core 43. The second elastic member 44 is sleeved on one end of the ejector pin 45 and arranged in the valve cavity 431, and the other end of the ejector pin 45 is fixedly connected to the valve seat 41; the valve cavity 431 is connected to the intake valve 20 through the second gas path 60. When the valve seat 41 is rotated to move the valve seat 41 in the direction of compression of the first elastic member 42, the ejector pin 45 compresses the second elastic member 44. At this time, the intake valve 20 can be closed through the second gas path 60. When adjusting the vacuum adjustment component 40, the valve seat 41 is rotated to move along the compression direction of the first elastic member 42. At this time, the effects of the first elastic member 42 and the second elastic member 44 are overcome, so that the ejector pin 45 compresses the valve chamber 431. Since the valve chamber 431 is connected to the second air path 60, the air inlet valve 20 is closed when the mechanical structure is lifted, thereby cutting off the air path connection between the vacuum generating chamber 31 and the first air path 50, and the vacuum degree in the vacuum generating chamber 31 remains balanced.

[0031] In practical applications, in order to facilitate operation, such as Figure 3 As shown, the valve seat 41 includes a valve seat body 411 and a base 413 with a protrusion 412. The outer wall of the valve seat body 411 is provided with a threaded structure 414. The valve seat body 411 can be rotatably arranged in the shell 10, that is, the valve seat body 411 is threadedly connected to the shell 10 for easy rotation and adjustment; one end of the first elastic member 42 is sleeved on the protrusion 412, and the other end is pressed against the inner wall of the valve seat body 411, and the valve seat body 411 is sleeved and connected with the base 413; the base 413 is fixedly connected to the ejector pin 45; the base 413 can move along the direction of the expansion and contraction of the first elastic member 42 as the valve seat body 411 rotates, so that the ejector pin 45 acts on the second elastic member 44. The overall structural design of the vacuum adjustment assembly 40 is flexible, and vacuum adjustment can be achieved through purely mechanical action. In addition, in order to prevent over-adjustment, such as Figure 4 As shown, the vacuum adjustment assembly 40 also includes a limit rod 46 fixed in the housing 10 , the limit rod 46 is located between the base 413 and the first valve core 43 , and the limit rod 46 is arranged at the end point of the stroke of the base 413 .

[0032] In an improved embodiment, Figure 3As shown, the air inlet valve 20 includes a first valve body 21 provided with a first cavity, a closing structure 22 and a second valve body 23 provided with a second cavity, the first inlet of the first cavity is connected to the first air path 50, the air inlet hole 311 of the vacuum generating cavity 31 is connected to the first cavity through the first outlet of the first cavity, the second inlet of the second cavity is connected to the second air path 60, and the closing structure 22 is movably arranged at the second outlet of the second cavity; the vacuum adjustment component 40 can move the closing structure 22 from the second outlet to the first outlet through the second air path 60, and when the closing structure 22 is located at the first outlet, the air inlet hole 311 is disconnected from the air path connection with the first cavity, and at this time, the second outlet is connected to the air inlet hole 311. When a positive pressure gas source is input to the device, the first outlet is opened, and the gas source enters the vacuum generating assembly 30 to generate a vacuum; when the vacuum degree in the vacuum generating chamber 31 reaches the set value, the pressure in the vacuum adjusting assembly 40 also reaches a balanced state. At this time, the negative pressure in the vacuum adjusting assembly 40 enters the second inlet of the second valve body 23 through the second gas path 60, and pushes open the closing structure 22 at the second outlet, so that the closing structure 22 blocks the first outlet of the first cavity, thereby closing the air inlet valve 20 and cutting off the gas path connection between the vacuum generating chamber 31 and the first gas path 50.

[0033] In an improved embodiment, Figure 5 and Figure 6 As shown, the energy-saving vacuum generator of the utility model further includes a vacuum breaking component 70 and a third gas path 80. The vacuum breaking component 70 is provided with a vacuum breaking hole 71 communicating with the outside of the housing 10, and the two ends of the third gas path 80 are respectively communicated with the vacuum breaking component 70 and the vacuum generating chamber 31. In practical applications, when an object needs to be released quickly, gas can be blown into the vacuum breaking hole 71 to destroy the vacuum state in the vacuum generating chamber 31 through the third gas path 80. Such a design can still maintain vacuum in unexpected situations such as power failure, thereby improving safety.

[0034] In the above embodiment, if Figure 2 As shown, the vacuum generating chamber 31 also includes a vacuum hole 312, and a pressure-maintaining diaphragm 313 is provided at the vacuum hole 312. In practical applications, the stability when grasping objects is higher and the leakage flow is smaller. In addition, the vacuum generating assembly 30 also includes a muffler 32 connected to the vacuum generating chamber 31.

[0035] As an improvement to the above embodiment, Figure 3 , Figure 5 and Figure 6As shown, the housing 10 includes a first housing 11, a second housing 12 and a third housing 13 which are assembled in cooperation with each other, an air inlet valve 20 is arranged in the second housing 12 and partially extends to the first housing 11, a first gas path 50 is formed in the first housing 11, a vacuum generating assembly 30 is arranged in the second housing 12, a vacuum regulating assembly 40 is arranged on the third housing 13 and partially extends to the first housing 11, and a sealing gasket 14 is provided on the transition surface between the first housing 11 and the third housing 13, and a valve seat 41 of the vacuum regulating assembly 40 is clamped thereon to ensure the sealing performance between the gas paths, a second gas path 60 is formed through the first housing 11 and the second housing 12, and a third gas path is formed through the first housing 11, the second housing 12 and the third housing 13. The design of the equipment with multiple housings assembled in cooperation with each other facilitates the accurate forming of multiple gas paths, simplifies the production process, and improves production efficiency.

[0036] In addition, if Figure 3 As shown, the third housing 13 is further provided with a detection hole 131, which can be connected to the vacuum generating chamber 31. The detection hole 131 can be connected to a vacuum detector and other equipment to observe the vacuum and other conditions of the equipment at any time.

[0037] The following Tables 1 and 2 are relevant experimental data.

[0038] Table 1 Vacuum flow rate (L / min) at different vacuum degrees (-Kpa)

[0039]

[0040] Table 2 Vacuum pumping time (S / L) at different vacuum degrees (-Kpa)

[0041]

[0042] The energy-saving vacuum generator of the utility model can stop supplying gas when the vacuum degree reaches the set value due to its mechanical control to adjust the negative pressure, so that long-term adsorption can be achieved with intermittent gas supply. In addition, in the long-term adsorption state, the gas source can be saved by more than 99%, and it can adapt to various working conditions, and is particularly suitable for grasping workpieces with small leakage flow.

[0043] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not intended to limit the implementation methods of the utility model. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An energy-saving vacuum generator, characterized in that: The invention comprises a shell with an air source inlet, wherein an air intake valve, a vacuum generating component, a vacuum regulating component, a first air path and a second air path are arranged in the shell, wherein the first air path is connected to the air source inlet, and the air intake valve is connected to the first air path and the second air path at the same time, and the vacuum generating component comprises a vacuum generating chamber with an air intake hole, and the air intake hole can be connected to the first air path through the air intake valve, and the vacuum regulating component can close the air intake valve through the second air path, so that the air intake hole is disconnected from the air path connection of the first air path.

2. The energy-saving vacuum generator according to claim 1, characterized in that: The vacuum regulating assembly comprises a valve seat rotatably arranged in the shell, a first elastic member, a first valve core, a second elastic member and a ejector pin, the first elastic member being arranged in the valve seat, the valve seat being movably arranged in the shell along the direction in which the first elastic member is extended and retracted, the first valve core being fixed in the shell, and a valve cavity communicating with the second gas path being arranged in the first valve core, the second elastic member being sleeved on one end of the ejector pin and arranged in the valve cavity, and the other end of the ejector pin being fixedly connected to the valve seat; the valve cavity being communicated with the air inlet valve through the second gas path, and when the valve seat is rotated to move the valve seat in the direction in which the first elastic member is compressed, the ejector pin compresses the second elastic member, and at this time the air inlet valve can be closed through the second gas path.

3. The energy-saving vacuum generator according to claim 2, characterized in that: The valve seat comprises a valve seat body and a base with a convex column, the outer wall of the valve seat body is provided with a threaded structure, and the valve seat body can be rotatably arranged in the shell; one end of the first elastic member is sleeved on the convex column, and the other end is pressed against the inner wall of the valve seat body, and the valve seat body is sleeve-connected with the base; the base is fixedly connected with the ejector pin; the base can move along the direction of extension and contraction of the first elastic member as the valve seat body rotates, so that the ejector pin acts on the second elastic member.

4. The energy-saving vacuum generator according to claim 3, characterized in that: The vacuum regulating assembly further comprises a limit rod fixed in the housing, the limit rod is located between the base and the first valve core, and the limit rod is arranged at a stroke end point of the base.

5. The energy-saving vacuum generator according to claim 1, characterized in that: The air inlet valve includes a first valve body provided with a first cavity, a closing structure and a second valve body provided with a second cavity, the first inlet of the first cavity is connected to the first air path, the air inlet of the vacuum generating cavity is connected to the first cavity through the first outlet of the first cavity, the second inlet of the second cavity is connected to the second air path, and the closing structure is movably arranged at the second outlet of the second cavity; the vacuum adjustment component can move the closing structure from the second outlet to the first outlet through the second air path, and when the closing structure is located at the first outlet, the air inlet is disconnected from the air path of the first cavity, and at this time, the second outlet is connected to the air inlet.

6. The energy-saving vacuum generator according to claim 1, characterized in that: It also includes a vacuum breaking component and a third air path. The vacuum breaking component is provided with a vacuum breaking hole connected to the outside of the shell. The two ends of the third air path are respectively connected to the vacuum breaking component and the vacuum generating chamber.

7. The energy-saving vacuum generator according to claim 1, characterized in that: The vacuum generating chamber further comprises a vacuum hole, and a pressure-maintaining diaphragm is arranged at the vacuum hole.

8. The energy-saving vacuum generator according to claim 1, characterized in that: The vacuum generating assembly further includes a muffler connected to the vacuum generating chamber.

9. The energy-saving vacuum generator according to any one of claims 1 to 8, characterized in that: The shell includes a first shell, a second shell and a third shell that are assembled together. The air intake valve is arranged in the second shell and partially extends to the first shell. The first air path is formed in the first shell. The vacuum generating component is arranged in the second shell. The vacuum adjusting component is arranged on the third shell and partially extends to the first shell. A sealing gasket is provided on the transition surface between the first shell and the third shell. The second air path is formed through the first shell and the second shell.

10. The energy-saving vacuum generator according to claim 9, characterized in that: The third shell is also provided with a detection hole, and the detection hole can be connected with the air path of the vacuum generating chamber.

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