Lubricating system flow control valve

Abstract

The utility model discloses a flow control valve of a lubricating system, which relates to the technical field of valve design and comprises a valve body, a shell is fixedly mounted at the upper end of the valve body, a valve rod penetrates through and is rotatably mounted in the middle of the valve body and the shell, an internal thread is arranged in the valve rod close to the upper side, and the valve rod is connected with the shell. The upper end of the valve rod is in threaded connection with a transmission shaft through internal threads, the upper end of the transmission shaft is fixedly sleeved with a driven gear, a servo motor is fixedly installed at the upper end of the shell, the output end of the lower end of the servo motor penetrates through the shell and is fixedly sleeved with a driving gear, and the position, close to the upper end, of the outer side of the valve rod is fixedly sleeved with a fixing piece. When the reset spring is damaged or the valve clack is clamped, the valve clack can be controlled again by opening the servo motor, the lubricating work of equipment in operation is completed, the equipment does not need to be shut down and reorganized immediately, and maintenance and replacement operation can be carried out in a planned mode to serve as a second guarantee when the equipment is shut down.

Description

Technical Field

[0001] The utility model relates to the technical field of valve design, in particular to a flow control valve for a lubrication system. Background Art

[0002] The so-called lubrication system refers to the general term for a series of grease supply, grease discharge and its auxiliary devices that supply lubricants to the lubrication parts. Among them, a flow control valve is needed to adjust and control the oil supply. Most of the flow control valves currently used in the market have a simple and compact structure, but they have high requirements for processing accuracy, and a lot of post-testing work is required, and the cost of use is high. For example, the flow control valve used in vehicle gearboxes, but when lubricating equipment used in other industries, such as ports, mines and steel mills, there are no such high precision requirements. The cost can be appropriately reduced to move towards continuous operation, and timely remediation after wear or jamming problems occur, thereby avoiding losses caused by suspension of operations due to equipment problems. Therefore, we propose a lubrication system flow control valve to solve the above problems. Utility Model Content

[0003] The main purpose of the utility model is to provide a flow control valve for a lubrication system, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a lubrication system flow control valve, including a valve body, a shell is fixedly installed on the upper end of the valve body, a valve stem is penetrated and rotatably installed in the middle position of the valve body and the shell, an internal thread is provided inside the valve stem near the upper side, the upper end of the valve stem is threadedly connected to a transmission shaft through the internal thread, the upper end of the transmission shaft is fixedly sleeved with a slave gear, a servo motor is fixedly installed on the upper end of the shell, the lower end output end of the servo motor penetrates the shell and is fixedly sleeved with a main gear, the main gear and the slave gear are meshingly connected, the outer side of the valve stem is fixedly sleeved with a fixing piece near the upper end, the inner side of the shell is fixedly connected with a limit rod near the right side, and the right end of the fixing piece penetrates and is slidably sleeved on the outer side of the limit rod.

[0005] Preferably, the length of the internal thread is greater than the length of the screw at the lower end of the transmission shaft.

[0006] Preferably, the upper end of the transmission shaft is rotatably connected to the housing, a bearing is fixedly sleeved on the outer side of the transmission shaft near the upper side, and the outer ring of the bearing is fixedly connected to the housing.

[0007] Preferably, a sealing ring is slidably sleeved on the outer side of the valve stem at the connection with the upper end of the valve body, and the sealing ring is arranged inside the valve body.

[0008] Preferably, the lower end of the valve stem passes through and is slidably connected with a valve disc, a sliding cavity is provided inside the valve disc, the lower end of the valve stem is fixedly connected with a slider, the slider is slidably connected inside the sliding cavity, and a return spring is provided on the outer side of the valve stem between the upper end of the valve disc and the inner top wall of the valve body.

[0009] Preferably, an oil inlet is provided at the lower end of the valve body, and an oil outlet is provided at the right end of the valve body.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. This device can control the opening and closing degree of the valve disc and the oil hole accordingly according to the different oil pressure and oil volume of the oil supply device through the adaptive characteristics of the reset spring, so as to achieve the effect of regulation. It is simple and practical. Furthermore, when the valve disc and the oil hole are worn out and cannot be sealed due to long-term collision, the pressure between the valve disc and the oil hole can be adjusted by turning on the servo motor, so that it is more flexible and convenient in use, and it is convenient for the staff to debug. In addition, the sealing defects caused by collision and wear can be repaired to a certain extent, thereby increasing the service life of the valve disc and other structures and reducing the use cost.

[0012] 2. In addition, the speed can be reduced by driving the larger diameter slave gear with the smaller diameter main gear, so that the valve disc can be controlled more calmly and precisely. When the reset spring is damaged or the valve disc is stuck, the valve disc can be controlled again by turning on the servo motor to complete the lubrication of the equipment in operation. There is no need to stop business immediately for rectification. Maintenance and replacement operations can be carried out in a planned manner during shutdown as a second guarantee. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a flow control valve for a lubrication system according to the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of a flow control valve for a lubrication system according to the utility model;

[0015] Figure 3 It is a partial cross-sectional structural schematic diagram of a flow control valve of a lubrication system of the utility model;

[0016] Figure 4 The utility model is a flow control valve for a lubrication system Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0017] In the figure: 1. valve body; 2. housing; 3. valve stem; 4. transmission shaft; 5. internal thread; 6. slave gear; 7. servo motor; 8. main gear; 9. fixing part; 10. limit rod; 11. bearing; 12. sealing ring; 13. valve disc; 14. sliding cavity; 15. slider; 16. return spring; 17. oil inlet; 18. oil outlet. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-Figure 4 As shown, a lubrication system flow control valve comprises a valve body 1, a housing 2 is fixedly mounted on the upper end of the valve body 1, a valve stem 3 is penetrated and rotatably mounted in the middle position of the valve body 1 and the housing 2, an internal thread 5 is arranged inside the valve stem 3 near the upper side, a transmission shaft 4 is threadedly connected to the upper end of the valve stem 3 through the internal thread 5, a slave gear 6 is fixedly sleeved on the upper end of the transmission shaft 4, a servo motor 7 is fixedly mounted on the upper end of the housing 2, a main gear 8 is fixedly sleeved on the lower end output end of the servo motor 7, the main gear 8 is meshedly connected with the slave gear 6, a fixing piece 9 is fixedly sleeved on the outer side of the valve stem 3 near the upper end, a limit rod 10 is fixedly connected to the inner side of the housing 2 near the right side, and the right end of the fixing piece 9 penetrates and is slidably sleeved on the outer side of the limit rod 10;

[0020] By turning on the servo motor 7 and making its output end drive the main gear 8 to rotate, the valve stem 3 can eventually drive the valve flap 13 to rise and fall, and then when a problem occurs, the valve flap 13 can be controlled again through this method to complete the lubrication work of the equipment in operation. There is no need to stop business immediately for rectification, and maintenance and replacement operations can be carried out in a planned manner during shutdown. As a second guarantee, the pressure between the valve flap 13 and the oil hole can be directly adjusted through this method, so that it is more flexible and convenient when used, and it is convenient for the staff to debug. To a certain extent, the sealing defects caused by collision and wear can be repaired, thereby increasing the service life of the valve flap 13 and other structures and reducing the cost of use.

[0021] The length of the internal thread 5 is greater than the length of the screw at the lower end of the transmission shaft 4 , ensuring that the valve stem 3 can move upward or downward within a certain range driven by the transmission shaft 4 .

[0022] The upper end of the transmission shaft 4 is rotatably connected to the housing 2, and a bearing 11 is fixedly sleeved on the outer side of the transmission shaft 4 near the upper side. The outer ring of the bearing 11 is fixedly connected to the housing 2, which not only ensures that the transmission shaft 4 can rotate normally, but also plays a supporting and fixing role, thereby ensuring the rationality of the structural design.

[0023] The outer side of the valve stem 3 is slidably connected with a sealing ring 12 at the connection with the upper end of the valve body 1. The sealing ring 12 is arranged inside the valve body 1. That is, when the lubricating oil enters the inside of the valve body 1, the sealing ring 12 can prevent the lubricating oil from entering the inside of the housing 2.

[0024] The lower end of the valve stem 3 penetrates and is slidably connected with a valve disc 13, a sliding cavity 14 is provided inside the valve disc 13, a slider 15 is fixedly connected to the lower end of the valve stem 3, the slider 15 is slidably connected inside the sliding cavity 14, and a return spring 16 is provided on the outer side of the valve stem 3 between the upper end of the valve disc 13 and the inner top wall of the valve body 1;

[0025] After the oil supply device is opened, under the action of pressure, the return spring 16 is forced to shrink, and at the same time, it slides inside the sliding cavity 14 through the slider 15 to provide a stable function, thereby ensuring that the valve flap 13 can rise to separate its lower end from the oil hole, releasing the sealing effect, so that the lubricating oil can enter the interior of the valve body 1 and finally enter the lubrication part of the equipment through the oil outlet 18. In this process, according to the different oil pressure and oil volume of the oil supply device, the adaptive characteristics of the return spring 16 can control the opening and closing degree of the valve flap 13 and the oil hole accordingly, thereby achieving the effect of regulation, which is simple and practical.

[0026] An oil inlet 17 is provided at the lower end of the valve body 1, and an oil outlet 18 is provided at the right end of the valve body 1. The oil inlet 17 is connected to an oil supply device to provide lubricating oil, and the oil outlet 18 is connected to a lubricating part of the equipment.

[0027] Working principle:

[0028] When in use, the oil supply device is connected through the oil inlet 17 to provide lubricating oil, and the oil outlet 18 is connected to the lubricating part of the equipment required. After the oil supply device is opened, under the action of pressure, the return spring 16 is forced to shrink, and at the same time, the slider 15 slides inside the sliding cavity 14 to provide a stable function, thereby ensuring that the valve flap 13 can rise to separate its lower end from the oil hole, releasing the sealing effect, so that the lubricating oil can enter the interior of the valve body 1, and finally enter the lubricating part of the equipment through the oil outlet 18. In this process, according to the different oil pressure and oil volume of the oil supply device, the opening and closing degree of the valve flap 13 and the oil hole can be controlled accordingly through the adaptive characteristics of the return spring 16, so as to achieve the effect of regulation, which is simple and practical. Furthermore, when the valve flap 13 and the oil hole are worn out due to long-term collision and cannot be sealed, or the return spring 16 is damaged and the valve flap 13 is stuck, the servo motor 7 is turned on to make its output end drive the main gear 8 to rotate, and the rotation of the main gear 8 drives the rotation of the slave gear 6. It is worth mentioning that through the smaller diameter The main gear 8 drives the larger diameter slave gear 6 to achieve the purpose of reducing the speed, so that the valve disc 13 can be controlled more calmly and finely. The rotation of the slave gear 6 can drive the transmission shaft 4 to rotate, and the lower end of the transmission shaft 4 is threadedly connected to the valve stem 3, and the valve stem 3 slides up and down on the outside of the limit rod 10 through the right end of the fixing member 9, which plays a role of limiting and guiding. Therefore, the rotation of the transmission shaft 4 can drive the valve stem 3 to move up and down, and the valve disc 13 can be driven to move up and down through the valve stem 3. Then, when a problem occurs, the valve disc 13 can be controlled again by this method to complete the lubrication work of the equipment in operation. There is no need to stop business immediately for rectification. Maintenance and replacement operations can be carried out in a planned manner during shutdown. As a second guarantee, the pressure between the valve disc 13 and the oil hole can be directly adjusted by this method, so that it is more flexible and convenient to use, which is convenient for the staff to debug, and to a certain extent, the sealing defects caused by collision and wear can be repaired, thereby improving the service life of the valve disc 13 and other structures and reducing the cost of use.

[0029] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A lubrication system flow control valve, comprising a valve body (1), characterized in that: The upper end of the valve body (1) is fixedly mounted with a shell (2); a valve stem (3) is penetrated and rotatably mounted in the middle of the valve body (1) and the shell (2); an internal thread (5) is provided inside the valve stem (3) near the upper side; the upper end of the valve stem (3) is threadedly connected with a transmission shaft (4) through the internal thread (5); a slave gear (6) is fixedly sleeved on the upper end of the transmission shaft (4); a servo motor (7) is fixedly mounted on the upper end of the shell (2); the lower output end of the servo motor (7) penetrates the shell (2) and is fixedly sleeved with a main gear (8); the main gear (8) and the slave gear (6) are meshingly connected; a fixing member (9) is fixedly sleeved on the outer side of the valve stem (3) near the upper end; a limiting rod (10) is fixedly connected to the inner side of the shell (2) near the right side; the right end of the fixing member (9) penetrates and is slidably sleeved on the outer side of the limiting rod (10).

2. A lubrication system flow control valve according to claim 1, characterized in that: The length of the internal thread (5) is greater than the length of the screw at the lower end of the transmission shaft (4).

3. A lubrication system flow control valve according to claim 1, characterized in that: The upper end of the transmission shaft (4) is rotationally connected to the housing (2), a bearing (11) is fixedly sleeved on the outer side of the transmission shaft (4) near the upper side, and the outer ring of the bearing (11) is fixedly connected to the housing (2).

4. A lubrication system flow control valve according to claim 1, characterized in that: A sealing ring (12) is slidably sleeved on the outer side of the valve stem (3) at the connection with the upper end of the valve body (1), and the sealing ring (12) is arranged inside the valve body (1).

5. A lubrication system flow control valve according to claim 1, characterized in that: The lower end of the valve stem (3) passes through and is slidably connected to a valve flap (13), a sliding cavity (14) is provided inside the valve flap (13), the lower end of the valve stem (3) is fixedly connected to a slider (15), the slider (15) is slidably connected inside the sliding cavity (14), and a return spring (16) is provided on the outer side of the valve stem (3) between the upper end of the valve flap (13) and the inner top wall of the valve body (1).

6. A lubrication system flow control valve according to claim 1, characterized in that: The lower end of the valve body (1) is provided with an oil inlet (17), and the right end of the valve body (1) is provided with an oil outlet (18).

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