A main gas circuit centralized lubrication control system

Abstract

The present invention belongs to the technical field of press lubrication, and relates to a main gas circuit centralized lubrication control system, including a distribution block, wherein the distribution block is provided with A, B, C and D ports that are interconnected, the A port and the B port are connected to the main gas source, the C port is connected to the first gas source branch and the fourth gas source branch that are arranged in parallel, the first gas source branch is connected to the second gas source branch and the third gas source branch that are arranged in parallel, the second gas source branch and the third gas source branch are connected in parallel and are connected to each solenoid valve branch through the D port, and the second gas source branch and the third gas source branch are each provided with two one-way valves, the fourth gas source branch is connected to the first supercharger and the second supercharger, the first supercharger is connected between the two one-way valves on the third gas source branch, and the second supercharger is connected between the two one-way valves on the second gas source branch. The present invention can fully and effectively lubricate the solenoid valve components, reduce wear, extend the service life, improve the reliability of the machine tool, and ensure the safety of use.

Description

Technical Field

[0001] The invention belongs to the technical field of press lubrication, and in particular relates to a main gas circuit centralized lubrication control system. Background Art

[0002] As enterprises have increasing requirements for production efficiency and economic benefits, the requirements for mechanical presses to achieve multi-station, large table, large tonnage and automation are also getting higher and higher. The realization of mechanical press automation relies on the connection of related electromagnetic components to PLC, and the PLC controls the linkage of multiple components to achieve intelligence and visualization. The solenoid valves in mechanical presses are generally driven by pneumatic pressure + PLC controls their movement and reversing, so the solenoid valve components are basically connected to the air circuit. In order to ensure that the piston in the solenoid valve component keeps moving and reversing without being easily damaged, the solenoid valves need to be lubricated with lubricating oil. The traditional solenoid valve lubrication method is to connect an oil mist collector to the front end of the solenoid valve air circuit. The air pressure atomizes the lubricating oil in the oil mist collector and blows it into the solenoid valve for lubrication. However, such large presses with high automation requirements have many solenoid valves and are scattered in various parts of the machine tool. That is, a large number of oil mist collectors are required and they are scattered, while the lubricating oil in the oil mist collector is limited. Lubricating oil needs to be added regularly to ensure that the solenoid valves are adequately lubricated. However, in order to save costs, some companies do not have low oil level detection and alarm in the oil mist collector, and need to manually check the lubricating oil conditions of all oil mist collectors on the machine tool at regular intervals, which requires a large amount of work, high maintenance costs, and is time-consuming and labor-intensive. Summary of the invention

[0003] The purpose of the present invention is to solve the problem in the prior art that the lubrication structure of the solenoid valve components of the press air circuit is complex and the effect is not ideal. A main air circuit centralized lubrication control system is provided, which can achieve sufficient, long-term and effective lubrication of the solenoid valve components, reduce wear, extend service life, improve the reliability of the machine tool, and ensure safety in use; it can also detect and alarm the low oil level of the lubricating oil in the oil mist collector to ensure its operating status.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a main air circuit centralized lubrication control system, including a distribution block, on which are provided A, B, C and D ports which are interconnected, the A port and the B port being connected to the main air source, the C port being connected to a first air source branch and a fourth air source branch which are arranged in parallel, the first air source branch being connected to a second air source branch and a third air source branch which are arranged in parallel, the second air source branch and the third air source branch being connected in parallel and connected to each solenoid valve branch through the D port, and two one-way valves being respectively provided on the second air source branch and the third air source branch, the fourth air source branch being connected to a first supercharger and a second supercharger which are arranged in parallel, the outlet of the first supercharger being connected between the two one-way valves on the third air source branch, and the outlet of the second supercharger being connected between the two one-way valves on the second air source branch.

[0005] Preferably, a first stop valve and a first air filter are provided between the C port and the first air source branch and the fourth air source branch arranged in parallel.

[0006] Preferably, a second stop valve, an oil mist collector and a second air filter are provided between the D port and the second air source branch and the third air source branch arranged in parallel.

[0007] Preferably, the oil mist collector has a low oil level detection component electrically connected to the PLC.

[0008] Preferably, a pressure reducing valve and an electromagnetic reversing valve are provided on the fourth gas source branch, and two outlets of the electromagnetic reversing valve are connected to the first supercharger and the second supercharger respectively.

[0009] Preferably, the electromagnetic reversing valve is a two-position two-way electromagnetic valve, and the electromagnetic reversing valve is electrically connected to the PLC.

[0010] After adopting the above technical solution, the main gas circuit centralized lubrication control system provided by the present invention has the following beneficial effects:

[0011] The present invention can ensure that the air pressure before and after the second air source branch and the third air source branch are connected in parallel is equal through the design that both the A port and the B port of the distribution block are connected to the main air source, so as to ensure that the pressurized gas can atomize the lubricating oil in the oil mist device and smoothly enter the lubrication branches of each solenoid valve; through the design of two one-way valves on each of the second air source branch and the third air source branch, it can be ensured that the pressurized air source can only move along the direction where the oil mist device is installed; through the design of the pressure reducing valve, the pipeline cost can be saved and the air path loss can be reduced; through the design of the oil mist device low oil level detection component, the workload of the maintenance personnel can be greatly reduced, and the maintenance time and cost can be reduced; through the design of the first stop valve and the second stop valve, it is convenient for the staff to maintain and repair the air path components; through the design of two air filters, the double protection of the air source cleanliness can be achieved; in summary, the present invention provides a labor-saving, resource-saving, low lubrication management cost, and centralized maintenance of the main air path centralized lubrication control system, which can achieve full, long-term and effective lubrication of the solenoid valve components, reduce wear, extend the service life, improve the reliability of the machine tool, ensure the safety of use, has great market value, and is worthy of wide promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The present invention is a structural schematic diagram of a main gas circuit centralized lubrication control system.

[0013] Among them: distribution block 1, first air source branch 2, fourth air source branch 3, second air source branch 4, third air source branch 5, one-way valve 6, first supercharger 7, second supercharger 8, first stop valve 9, first air filter 10, second stop valve 11, oil mist collector 12, second air filter 13, pressure reducing valve 14, solenoid reversing valve 15, solenoid valve branch 16. DETAILED DESCRIPTION

[0014] The present invention is further described clearly and completely below in conjunction with the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0016] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0017] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0018] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0019] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0020] The present invention provides a main gas circuit centralized lubrication control system, such as Figure 1As shown, it includes a distribution block 1, and the distribution block 1 is provided with A, B, C and D ports that are interconnected. The A port and the B port are connected to the main air source, and the C port is connected to the first air source branch 2 and the fourth air source branch 3 arranged in parallel. Specifically, a first stop valve 9 and a first air filter 10 are arranged between the C port and the first air source branch 2 and the fourth air source branch 3 arranged in parallel, that is, the air source comes out of the C port and is connected to the first stop valve 9 and the first air filter 10 in sequence, and then is divided into two paths, namely the first air source branch 2 and the fourth air source branch 3 arranged in parallel, and the first air source branch 2 is connected to the first air source branch 2 and the fourth air source branch 3 arranged in parallel. The second gas source branch 4 and the third gas source branch 5 are set. Specifically, one gas path is divided into two paths again along the first gas source branch 2 to point E, which are the second gas source branch 4 and the third gas source branch 5 set in parallel. The second gas source branch 4 and the third gas source branch 5 are respectively connected in series with two one-way valves 6. After the second gas source branch 4 and the third gas source branch 5 are connected in parallel, they are connected to each solenoid valve branch 16 through the D port. Specifically, a second stop valve 11, an oil mist collector 12 and a second air filter 13 are arranged between the D port and the second gas source branch 4 and the third gas source branch 5 set in parallel. That is, the second air source branch 4 and the third air source branch 5 are connected in parallel to converge at point F, and then the second air filter 13, the oil mist collector 12 and the second stop valve 11 are connected in sequence to the D port and then communicated with each solenoid valve branch 16; the fourth air source branch 3 is connected to the first supercharger 7 and the second supercharger 8 arranged in parallel, the outlet of the first supercharger 7 is connected between the two one-way valves 6 on the third air source branch 5, and the outlet of the second supercharger 8 is connected between the two one-way valves 6 on the second air source branch 4. Specifically, the fourth air source branch 3 is provided with a pressure reducing valve 14 and an electromagnetic reversing valve 15. The two outlets of the magnetic reversing valve 15 are respectively connected to the first supercharger 7 and the second supercharger 8, that is, another gas path is connected to the pressure reducing valve 14 and the electromagnetic reversing valve 15 in sequence along the fourth gas source branch 3. The electromagnetic reversing valve 15 is a two-position two-way electromagnetic valve. The electromagnetic reversing valve 15 is provided with two outlets, one outlet is connected to the inlet of the first supercharger 7, and the outlet of the first supercharger 7 is connected to the point H between the two one-way valves 6 on the third gas source branch 5, and the other outlet is connected to the inlet of the second supercharger 8, and the outlet of the second supercharger 8 is connected to the point W between the two one-way valves 6 on the second gas source branch 4.

[0021] Furthermore, the oil mist collector 12 has a low oil level detection component, and the oil mist collector 12 and the electromagnetic reversing valve 15 are both electrically connected to the PLC.

[0022] It should be noted that the A and B ports of the distribution block 1 in the present invention must be connected to the main gas source (pressure of 5 kgf / cm 2) to make the air pressure at points E and F equal, thereby ensuring that the one-way valves 6 on the second air source branch 4 and the third air source branch 5 remain stationary, thereby ensuring that the air source can only be pressurized to 6kgf / cm through the booster line of the fourth air source branch 3 2 The lubricating oil of the oil mist device 12 can be atomized and sent to each solenoid valve branch 16. Otherwise, if only port A is connected to the main air source, then 5kgf / cm 2 The air source is not pressurized and is directly connected to the oil mist generator 12 along the second air source branch 4 and the third air source branch 5. The atomization pressure is low, and the loss of lubricating oil in the pipeline cannot guarantee the lubrication amount of each solenoid valve branch 16; if only port B is connected to the main air source, the one-way valve 6 on the second air source branch 4 and the third air source branch 5 is closed, and the oil mist generator 12 cannot reach the solenoid valve branch 16 after atomization, and cannot play any role as an atomizing solenoid valve.

[0023] The pressure reducing valve 14 of the fourth gas source branch 3 in the present invention only needs 4kgf / cm 2 It can be opened, so the air inlet is changed from G1" to G1 / 4", which saves pipeline costs and reduces air path losses. The air outlet is changed from G1 / 2" to G1" to allow the atomized lubricating oil to pass through the pipeline quickly, minimizing the lubricating oil sticking to the wall of the air path pipeline, thereby reducing lubricating oil loss.

[0024] In the present invention, the entire machine tool has only one oil mist collector 12, and the oil mist collector 12 is provided with a low oil level alarm. If the low oil level detection component detects that the lubricating oil in the oil mist collector 12 is not within the safe value, the signal is transmitted to the PLC, and the machine tool LCD display will alarm to prompt that lubricating oil needs to be added. The troubleshooting is simple, which greatly reduces the workload of maintenance personnel and saves maintenance time and cost.

[0025] When a main gas circuit centralized lubrication control system of the present invention is ready to start working, all the stop valves of the gas source are manually opened, that is, the first stop valve 9 and the second stop valve 11 are kept in a normally open state, and the A port and the B port of the distribution block 1 are respectively connected to the main gas source, and are generally not closed without special circumstances. One main gas source enters from the C port of the distribution block 1, and reaches the left end point E of the parallel line of the second gas source branch 4 and the third gas source branch 5 along the first gas source branch 2. The other main gas source enters from the D port of the distribution block 1 and reaches the right end point F of the parallel line of the second gas source branch 4 and the third gas source branch 5. Because the gas source pressures at points E and F are equal, both are 5kgf / cm 2 Therefore, the two one-way valves 6 connected in series on the second air source branch 4 and the third air source branch 5 are not opened and remain static, that is, the second air source branch 4 and the third air source branch 5 are blocked, and the oil mist collector 12 is also in a non-working state.

[0026] Then the main gas source can only reach the inlet of the two-position two-way electromagnetic reversing valve 15 after passing through the pressure reducing valve 14 along the fourth gas source branch 3. If the PLC does not connect the two-position two-way electromagnetic valve reversing valve 15, the two-position two-way electromagnetic valve reversing valve 15 is in the lower position, the second supercharger 8 is connected, and the first supercharger 7 is blocked. The gas source can only reach the W point of the second gas source branch 4 through the inlet of the second supercharger 8, because the gas source pressure increases to 6kgf / cm after being pressurized by the second supercharger 8. 2 , the air source pressure at point W after pressurization is 6kgf / cm 2 >Point E, F 5kgf / cm 2 , the one-way valve between points E and W is closed, and the one-way valve between points W and F is opened. The high-pressure air source passes through the second air filter 13 to atomize the lubricating oil in the oil mist device 12. After atomization, the lubricating oil passes through ports D and B along the air path to achieve atomization of each solenoid valve branch 16.

[0027] If the second supercharger 8 is damaged, the PLC will connect the two-position two-way solenoid valve 15, and the two-position two-way solenoid valve 15 will move to the upper position. The gas source can only reach the H point of the third gas source branch 5 through the inlet of the first supercharger 7. Similarly, because the gas source pressure increases to 6kgf / cm after being pressurized by the first supercharger 7, the gas source pressure increases to 6kgf / cm 2 , the air source pressure at point H after pressurization is 6kgf / cm 2 >Point E, F 5kgf / cm 2 , then the one-way valve between E and H is closed, the one-way valve between H and F is opened, and the high-pressure air source passes through the second air filter 13 to atomize the lubricating oil in the oil mist device 12. After atomization, the lubricating oil passes through the D port and the B port along the air path to realize the atomization of each solenoid valve branch 16. In this way, the two booster lines realize the double insurance of the normal operation of the oil mist device 12 atomization.

[0028] In summary, the main air circuit centralized lubrication control system provided by the present invention can ensure that the air pressure of the second air source branch and the third air source branch before and after parallel connection is equal through the design that both the A port and the B port of the distribution block are connected to the main air source, thereby ensuring that the pressurized gas can atomize the lubricating oil in the oil mist device and smoothly enter the lubrication branches of each solenoid valve; through the design of two one-way valves on each of the second air source branch and the third air source branch, it can be ensured that the pressurized air source can only move in the direction where the oil mist device is installed; through the design of the pressure reducing valve, the pipeline cost can be saved and the air circuit loss can be reduced; through the design of the low oil level detection component of the oil mist device, the workload of the maintenance personnel can be greatly reduced, and the maintenance time and cost can be reduced; through the first cut-off The design of the valve and the second stop valve can manually disconnect each air source branch from the main air source, so as to facilitate the staff to maintain and repair the air path components and ensure the safety of the staff; through the design of two air filters, double protection of the air source cleanliness can be achieved, ensuring that even if one of the air filters is damaged, the other can work normally without affecting the air source cleanliness; in summary, the present invention provides a labor-saving, resource-saving, low-lubrication management cost, and centralized maintenance main air path centralized lubrication control system, which can achieve sufficient, long-term and effective lubrication of solenoid valve components, reduce wear, extend service life, improve the reliability of machine tools, ensure safety of use, have great market value, and deserve wide promotion and application.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A main gas circuit centralized lubrication control system, characterized in that: The invention comprises a distribution block (1), wherein the distribution block (1) is provided with A, B, C and D ports which are interconnected, wherein the A port and the B port are connected to a main gas source, the C port is connected to a first gas source branch (2) and a fourth gas source branch (3) which are arranged in parallel, the first gas source branch (2) is connected to a second gas source branch (4) and a third gas source branch (5) which are arranged in parallel, the second gas source branch (4) and the third gas source branch (5) are connected in parallel and are connected to each solenoid valve branch (16) through the D port, and the second gas source branch (4) and the third gas source branch (5) are each provided with two one-way valves (6), the fourth gas source branch (3) is connected to a first supercharger (7) and a second supercharger (8) which are arranged in parallel, the outlet of the first supercharger (7) is connected between the two one-way valves (6) on the third gas source branch (5), and the outlet of the second supercharger (8) is connected between the two one-way valves (6) on the second gas source branch (4).

2. A main gas circuit centralized lubrication control system according to claim 1, characterized in that: A first stop valve (9) and a first air filter (10) are provided between the C port and the first air source branch (2) and the fourth air source branch (3) which are arranged in parallel.

3. A main gas circuit centralized lubrication control system according to claim 1, characterized in that: A second stop valve (11), an oil mist collector (12) and a second air filter (13) are provided between the D port and the second air source branch (4) and the third air source branch (5) which are arranged in parallel.

4. A main gas circuit centralized lubrication control system according to claim 3, characterized in that: The oil mist collector (12) has a low oil level detection component electrically connected to the PLC.

5. A main gas circuit centralized lubrication control system according to claim 1, characterized in that: The fourth gas source branch (3) is provided with a pressure reducing valve (14) and an electromagnetic reversing valve (15), and two outlets of the electromagnetic reversing valve (15) are respectively connected to the first supercharger (7) and the second supercharger (8).

6. A main gas circuit centralized lubrication control system according to claim 5, characterized in that: The electromagnetic reversing valve (15) is a two-position two-way electromagnetic valve, and the electromagnetic reversing valve (15) is electrically connected to the PLC.

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