CN214790411U - Pressure adjustable metering valve - Google Patents
Pressure adjustable metering valve Download PDFInfo
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- CN214790411U CN214790411U CN202120842145.1U CN202120842145U CN214790411U CN 214790411 U CN214790411 U CN 214790411U CN 202120842145 U CN202120842145 U CN 202120842145U CN 214790411 U CN214790411 U CN 214790411U
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Abstract
The utility model relates to a pressurized adjustable metering valve, which comprises a valve body, wherein the valve body is provided with an inlet and a plurality of outlets, each outlet is respectively provided with an oil outlet joint, the oil outlet joints are communicated with corresponding lubricating points through communicating pipes, a plurality of plunger type quantitative oil feeding devices are arranged in the valve body in parallel, and an oil inlet of each plunger type quantitative oil feeding device is communicated with the inlet of the valve body through an oil inlet channel; the method is characterized in that: the plunger type quantitative oil feeding device is composed of a one-way valve, a metering cavity, a plunger, a spring and a core rod, wherein a volume adjusting device is arranged in the metering cavity, the volume of the metering cavity is adjusted by adjusting the position of a piston ring at the end part of a screw rod in the metering cavity, so that the oil supply amount is adjusted, the oil supply amount can be adjusted according to the lubricating oil demand of each lubricating point, the accurate oil supply is realized, and the lubricating precision is improved.
Description
Technical Field
The utility model belongs to the technical field of it is lubricated functional basis part, in particular to pressurization formula metering valve among the quantitative lubricating arrangement is concentrated to mechanical equipment.
Background
The pressurized metering valve is a common oil supply element in a machine tool lubrication system, and is used for delivering lubricating oil at an outlet of an oil pump to various lubrication points of mechanical equipment through the metering valve. However, many mechanical devices require the lubricant displacement at the lubrication point to be determined according to the field conditions, which requires the pressurized metering valve to have the flow rate adjusting function. In the prior art, a high-pressure, high-viscosity and pressurized adjustable metering valve exists, but the metering valve is high in cost and cannot be popularized and used in a lubricating system of a common machine tool. There is also a pressure relief type adjustable metering valve, but the metering valve supplies oil to the lubricating point by means of pressure relief of an oil pump, the spring is reset to supply oil to the lubricating point, when the resistance of the lubricating pipeline is large, the spring cannot be reset to supply oil to the lubricating point, and the reliability of oil supply is poor.
Disclosure of Invention
The utility model aims at the shortcoming that prior art exists, provide a simple structure, with low costs, the good adjustable metering valve of pressurization formula of operational reliability.
The technical scheme of the utility model comprises a valve body, the valve body is provided with an inlet and a plurality of outlets, each outlet is respectively provided with an oil outlet joint, the oil outlet joints are communicated with corresponding lubricating points through communicating pipes, a plurality of plunger type quantitative oil feeding devices are arranged in the valve body in parallel, and an oil inlet of each plunger type quantitative oil feeding device is communicated with the inlet of the valve body through an oil inlet channel; the method is characterized in that: the plunger type quantitative oil feeding device comprises a one-way valve, a metering cavity, a plunger, a spring and a core rod, wherein the plunger is arranged in the metering cavity, the left end of the plunger is provided with an annular convex shoulder, the outer circular surface of the annular convex shoulder is in dynamic sealing fit with the cavity wall in the metering cavity to separate the metering cavity into a left metering cavity and a right metering cavity, the one-way valve is arranged in an oil inlet between an inlet of the valve body and the right metering cavity, the right metering cavity is communicated with an outlet cavity of the one-way valve through a first pressure oil duct, the left end of the left metering cavity is provided with a sealing threaded sleeve, the spring is arranged in the left metering cavity between the annular convex shoulder and the sealing threaded sleeve, and the inlet cavity of the one-way valve is communicated with an oil inlet channel; a second pressure oil duct is arranged between the left metering cavity and the oil outlet joint close to the end of the sealing screw sleeve, a core rod is arranged between the oil outlet joint and the outlet end of the one-way valve, the upper end of a central hole of the core rod is communicated with the second pressure oil duct, the lower end of the central hole of the core rod is communicated with the outlet cavity of the one-way valve, and a sealing surface which is matched with the upper end surface of the one-way valve is arranged between the lower end surface of the central hole of the core rod and the upper end surface of the one-way valve; the volume adjusting device is arranged in the left metering cavity and comprises a screw rod, an adjusting handle and a piston ring, the adjusting handle is fixedly connected to one end of the screw rod, the other end of the screw rod penetrates into the left metering cavity and is fixedly connected with the piston ring, the outer circular surface of the piston ring is in dynamic sealing fit with the inner wall of the left metering cavity, and the external thread of the screw rod is in threaded fit with the screw hole of the sealing screw sleeve.
According to the technical scheme, when an oil pump supplies oil, lubricating oil at the inlet of the valve body enters the right metering cavity through the one-way valve and the first pressure oil duct, meanwhile, the upper end of the one-way valve is in sealing fit with the lower end face of the core rod to seal the central hole of the core rod, the plunger is pushed to move leftwards by the pressure of the lubricating oil, and the lubricating oil stored in the left metering cavity is conveyed to a lubricating point through the second pressure oil duct and the oil outlet joint; when the oil pump stops supplying oil, the spring force pushes the plunger piston to move right, lubricating oil in the right metering cavity is pressed out from the first pressure oil duct, the one-way valve is pushed to be closed, the lubricating oil is injected into the left metering cavity through the central hole of the core rod and the second pressure oil duct, the lubricating oil in the left metering cavity is conveyed to a lubricating point when the oil pump supplies oil again, the oil pump circularly reciprocates and conveys the lubricating oil to the lubricating point in fixed time and fixed quantity; the volume of the metering cavity is adjusted by adjusting the position of the piston ring at the end of the screw rod in the left metering cavity, so that the oil supply amount is adjusted.
In the above technical scheme, the check valve adopts an umbrella-shaped rubber valve core structure, the umbrella-shaped rubber valve core is installed in an oil inlet made on the valve body, and the outer conical surface of the umbrella-shaped rubber valve core is provided with a radial step which is matched with a radial inner step in the oil inlet to form a one-way circulation sealing pair.
The pressure of lubricating oil at the inlet of the valve body pushes the umbrella-shaped rubber valve core to rise, the upper end face of the umbrella-shaped rubber valve core is in sealing contact with the lower end face of the core rod, the umbrella-shaped rubber valve core is radially compressed, and the lubricating oil passes through a gap between the outer circular face of the umbrella-shaped rubber valve core and the inner wall of the oil inlet and enters the right metering cavity through the first pressure oil duct; when the inlet of the valve body is decompressed, the spring pushes the plunger piston to move rightwards, the pressure of the lubricating oil in the right metering cavity pushes the umbrella-shaped rubber valve core to move downwards to be tightly and hermetically matched with the radial inner step in the oil inlet, and the umbrella-shaped rubber valve core is radially expanded to be hermetically matched with the inner wall of the oil inlet, so that the reverse circulation of the lubricating oil is prevented, and the one-way circulation of the lubricating oil is controlled.
Compared with the prior art, the utility model beneficial effect be: set up volume adjusting device at the measurement intracavity, through adjusting the position of screw rod tip piston ring in the measurement intracavity, adjust the volume in measurement chamber, reach the regulation to the fuel feeding volume, can adjust the fuel feeding volume according to the lubricating oil demand of each lubricating point, realize accurate fuel feeding, improve lubricated precision.
Drawings
Fig. 1 is a schematic view of the external structure of the present invention.
Fig. 2 is a schematic structural view in the direction of a-a in fig. 1 according to the present invention.
In the figure: the oil outlet valve comprises an adjusting handle 1, a screw rod 2, a locking nut 3, a sealing threaded sleeve 4, a piston ring 5, a spring 6, a valve body 7, a plunger 8, an annular shoulder 9, an oil outlet joint 10, a rubber ring 11, a rubber sealing ring 12, a core rod 13, a one-way valve 14, a central hole 15, an oil inlet channel 16, a first pressure oil channel 17, a second pressure oil channel 18, a metering cavity 19 and an oil outlet hole 20.
Detailed Description
The pressurized adjustable metering valve shown in fig. 1 and 2 comprises a valve body 7, wherein the valve body 7 is provided with an inlet and a plurality of outlets, each outlet is respectively provided with an oil outlet joint 10, the oil outlet joints 10 are communicated with corresponding lubricating points through communicating pipes, a rubber ring 11 is arranged between the outer circular surface of the oil outlet joints 10 and the valve body 7, a plurality of plunger type quantitative oil feeding devices are arranged in the valve body 7 in parallel, and an oil inlet of each plunger type quantitative oil feeding device is communicated with the inlet of the valve body 7 through an oil inlet channel 16; the method is characterized in that: the plunger type quantitative oil feeding device comprises a one-way valve 14, a metering cavity 19, a plunger 8, a spring 6 and a core rod 13, wherein the plunger 8 is arranged in the metering cavity 19, the left end of the plunger 8 is provided with an annular shoulder 9, the outer circular surface of the annular shoulder 9 is in dynamic sealing fit with the inner cavity wall of the metering cavity 19 to form a piston type structure, the metering cavity 19 is separated into a left metering cavity and a right metering cavity, an O-shaped rubber sealing ring is embedded on the outer circular surface of the annular shoulder 9 to improve the sealing performance, the one-way valve 14 is arranged in an oil inlet between an inlet of a valve body 7 and the right metering cavity, the right metering cavity is communicated with an outlet cavity of the one-way valve 14 through a first pressure oil duct 17, the left end of the left metering cavity is provided with a sealing threaded sleeve 4, the spring 6 is arranged in the left metering cavity between the annular shoulder 9 and the sealing threaded sleeve 4, and the inlet cavity of the one-way valve 14 is communicated with an oil inlet channel 16; a second pressure oil duct 18 is arranged between one end of the left metering cavity close to the sealing thread sleeve 4 and the oil outlet joint 10, a damping hole and an oil outlet hole 20 are arranged in the oil outlet joint 10, when the plunger 8 moves leftwards, lubricating oil in the left metering cavity flows into the oil outlet hole 20 through the second pressure oil duct 18 and the damping hole, a core rod 13 is arranged between the oil outlet joint 10 and the outlet end of the one-way valve 14, the upper end of a central hole 15 of the core rod 13 is communicated with the second pressure oil duct 18, the lower end of the core rod is communicated with an outlet cavity of the one-way valve 14, a sealing surface which is mutually matched is arranged between the lower end surface of the core rod and the upper end surface of the one-way valve 14, when the one-way valve 14 moves upwards, the sealing surface at the upper end of the core rod is in pressing sealing fit with the sealing surface at the lower end of the core rod 13, and a rubber sealing ring 12 is arranged between the outer circular surface of the core rod 13 and the valve body 7; the volume adjusting device is arranged in the metering cavity 19 and comprises a screw rod 2, an adjusting handle 1 and a piston ring 5, the adjusting handle 1 is fixedly connected to one end of the screw rod 2, the other end of the screw rod 2 penetrates into a left metering cavity and the piston ring 5, the outer circular surface of the piston ring 5 is matched with the inner cavity wall of the left metering cavity in a dynamic sealing mode, an O-shaped ring is embedded on the outer circular surface of the piston ring 5, the sealing performance is improved, the screw rod 2 is matched with the internal thread of a sealing threaded sleeve 4 screw hole through the external thread, a locking nut 3 is arranged between the screw rod 2 and the sealing threaded sleeve 4, and the screw rod 2 is prevented from being abnormally rotated.
According to the technical scheme, when an oil pump supplies oil, lubricating oil at the inlet of the valve body 7 enters the right metering cavity through the check valve 14 and the first pressure oil duct 17, meanwhile, the upper end of the check valve 14 is in sealing fit with the lower end face of the core rod 13 to seal the central hole 15 of the core rod 13, the plunger 8 is pushed by the pressure of the lubricating oil to move leftwards, and the lubricating oil stored in the left metering cavity is conveyed to a lubricating point through the second pressure oil duct 18, the damping hole of the oil outlet joint 10 and the oil outlet hole 20; when the oil pump stops supplying oil, the spring 6 pushes the plunger 8 to move right, lubricating oil in the right metering cavity is pressed out from the first pressure oil channel 17, the one-way valve 14 is pushed to be closed, the lubricating oil is injected into the left metering cavity through the central hole 15 of the core bar 13 and the second pressure oil channel 18, at the moment, the damping hole plays a role in preventing the lubricating oil or air at the outlet of the oil outlet hole 20 from flowing back to enter the left metering cavity, the lubricating oil in the left metering cavity is conveyed to a lubricating point when the oil pump supplies oil again, the oil pump circularly reciprocates, and the lubricating oil is conveyed to the lubricating point in a timing and quantitative mode; the volume of the metering cavity is adjusted by adjusting the position of the piston ring 5 at the end part of the screw rod 2 in the left metering cavity, so that the oil supply amount is adjusted.
In the above technical solution, the check valve 14 is of an umbrella-shaped rubber valve core structure, the umbrella-shaped rubber valve core is installed in an oil inlet made on the valve body 7, and a radial step is arranged on the outer conical surface of the umbrella-shaped rubber valve core and is matched with a radial inner step in the oil inlet to form a one-way circulation sealing pair; the upper end face of the umbrella-shaped rubber valve core is provided with a sealing surface which is matched with the lower end of the core rod 13, and a circular groove is arranged on the periphery of the sealing surface, so that the radial expansion performance of the umbrella-shaped rubber valve core is improved.
The pressure of lubricating oil at the inlet of the valve body 7 pushes the umbrella-shaped rubber valve core to rise, the upper end face of the umbrella-shaped rubber valve core is in sealing contact with the lower end face of the core rod 13, and meanwhile, the umbrella-shaped rubber valve core is radially compressed, so that the lubricating oil passes through an annular gap between the outer circular face of the umbrella-shaped rubber valve core and the oil inlet and enters the right metering cavity through the first pressure oil duct 17; when the inlet of the valve body 7 loses pressure, the spring 6 pushes the plunger 8 to move rightwards, the lubricating oil pressure in the right metering cavity pushes the umbrella-shaped rubber valve core to move downwards to be in press-tight sealing fit with the radial inner step in the oil inlet, and meanwhile, the umbrella-shaped rubber valve core is radially expanded to be in sealing fit with the inner wall of the oil inlet, so that the reverse circulation of the lubricating oil is prevented, and the one-way circulation of the lubricating oil is controlled.
Claims (2)
1. A pressurized adjustable metering valve comprises a valve body (7), wherein the valve body (7) is provided with an inlet and a plurality of outlets, each outlet is respectively provided with an oil outlet joint (10), the oil outlet joints (10) are communicated with corresponding lubricating points through communicating pipes, a plurality of plunger type quantitative oil feeding devices are arranged in the valve body (7) in parallel, and an oil inlet of each plunger type quantitative oil feeding device is communicated with the inlet of the valve body (7) through an oil inlet channel (16); the method is characterized in that: the plunger type quantitative oil feeding device is composed of a one-way valve (14), a metering cavity (19), a plunger (8), a spring (6) and a core rod (13), the plunger (8) is installed in the metering cavity (19), an annular shoulder (9) is arranged at the left end of the plunger (8), the outer circular surface of the annular shoulder (9) is in dynamic sealing fit with the inner cavity wall of the metering cavity (19) to separate the metering cavity (19) into a left metering cavity and a right metering cavity, the one-way valve (14) is installed in an oil inlet between an inlet of a valve body (7) and the right metering cavity, the right metering cavity is communicated with an outlet cavity of the one-way valve (14) through a first pressure oil duct (17), a sealing threaded sleeve (4) is installed at the left end of the left metering cavity, the spring (6) is installed in the left metering cavity between the annular shoulder (9) and the sealing threaded sleeve (4), and an inlet cavity of the one-way valve (14) is communicated with an oil inlet channel (16); a second pressure oil duct (18) is arranged between one end, close to the sealing threaded sleeve (4), of the left metering cavity and the oil outlet joint (10), a damping hole and an oil outlet hole (20) are formed in the oil outlet joint (10), a core rod (13) is arranged between the oil outlet joint (10) and the outlet end of the one-way valve (14), the upper end of a central hole (15) of the core rod (13) is communicated with the second pressure oil duct (18), the lower end of the central hole is communicated with an outlet cavity of the one-way valve (14), and sealing surfaces which are matched with each other are arranged between the lower end surface of the central hole and the upper end surface of the one-way valve (14); be equipped with volume adjusting device in measurement chamber (19), volume adjusting device comprises screw rod (2), adjustment handle (1) and piston ring (5), and adjustment handle (1) fixed connection is in screw rod (2) one end, and screw rod (2) other end penetrates left measurement chamber and piston ring (5) fixed connection, and piston ring (5) excircle face and the interior chamber wall of left measurement chamber move sealed cooperation, and screw rod (2) are through external screw thread and sealed swivel nut (4) screw thread fit.
2. Pressurized adjustable metering valve according to claim 1 characterized in that: the one-way valve (14) adopts an umbrella-shaped rubber valve core structure, the umbrella-shaped rubber valve core is arranged in an oil inlet formed in the valve body (7), and a radial step is arranged on the outer conical surface of the umbrella-shaped rubber valve core and is matched with a radial inner step in the oil inlet to form a one-way circulation sealing pair; the upper end face of the umbrella-shaped rubber valve core is provided with a sealing surface which is mutually matched with the lower end of the core rod (13), and the periphery of the sealing surface is provided with a circular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120842145.1U CN214790411U (en) | 2021-04-23 | 2021-04-23 | Pressure adjustable metering valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120842145.1U CN214790411U (en) | 2021-04-23 | 2021-04-23 | Pressure adjustable metering valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214790411U true CN214790411U (en) | 2021-11-19 |
Family
ID=78688754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120842145.1U Active CN214790411U (en) | 2021-04-23 | 2021-04-23 | Pressure adjustable metering valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214790411U (en) |
-
2021
- 2021-04-23 CN CN202120842145.1U patent/CN214790411U/en active Active
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