A drain and exhaust valve for a hydraulic oil delivery system

Abstract

The present invention relates to a drainage and exhaust valve of a hydraulic oil delivery system, comprising a valve body, the inner cavity of the valve body having a cylindrical oil storage chamber, the oil storage chamber being connected to an oil inlet pipe and an oil outlet pipe; the valve body is characterized in that an exhaust valve is arranged at the upper end of the oil storage chamber, and a drainage valve is arranged at the lower end; the air and water in the hydraulic oil can be discharged at the same time, the exhaust and drainage effect is good, the equipment installation space is small, and the cost is low. The valve body is suitable for equipment for discharging air and water in oil products on a hydraulic oil delivery pipeline.

Description

Technical Field

[0001] The present invention belongs to the field of valves, and in particular relates to a water discharge and exhaust valve, which is suitable for equipment for removing air and moisture from oil products on a high-pressure vacuum hydraulic oil delivery pipeline. Background Art

[0002] Hydraulic oil transported under high pressure and vacuum conditions generally contains air and water, which reduces the purity of the oil and affects the performance of the oil. In order to remove the air and water in the oil, a drain valve and an exhaust valve are generally installed on the oil transport pipeline, which requires a large installation space and high installation cost. In addition, the existing exhaust valve generally uses an oil-gas separator, which is limited by the oil-gas separation rate and has a poor exhaust effect. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a drain and exhaust valve for a hydraulic oil delivery system which has small installation space, low equipment cost and good exhaust and drainage effects.

[0004] The technical solution of the present invention includes a valve body, the inner cavity of the valve body has a cylindrical oil storage chamber, the oil storage chamber is connected to the oil inlet pipe and the oil outlet pipe; it is characterized in that an exhaust valve is arranged at the upper end of the oil storage chamber, and a drain valve is arranged at the lower end; the exhaust valve includes an exhaust float and an exhaust valve seat, the gravity of the exhaust float is less than its overall buoyancy in oil, and greater than its buoyancy in air, the exhaust valve seat is fixedly sealed and installed on the valve body at the upper end of the oil storage chamber, the exhaust valve seat is composed of a first exhaust valve seat sealing surface and a second exhaust valve seat sealing surface, the first exhaust valve seat sealing surface and the exhaust float sealing surface cooperate with each other to form an exhaust sealing pair, the second exhaust valve seat sealing surface is above An exhaust valve flap is provided, and the exhaust valve flap cooperates with the second exhaust valve seat sealing surface to form an exhaust one-way valve; the drain valve includes a drain float and a drain valve seat, the gravity of the drain float is greater than its overall buoyancy in oil and less than its buoyancy in water, the drain valve seat is fixedly sealed and installed on the valve body at the bottom of the oil storage chamber, the drain valve seat is composed of a first drain valve seat sealing surface and a second drain valve seat sealing surface, the first drain valve seat sealing surface and the drain float cooperate to form a drain sealing pair, a drain valve flap is provided below the second drain valve seat sealing surface, the drain valve flap cooperates with the second drain valve seat sealing surface to form a drain one-way valve.

[0005] Preferably, the exhaust valve disc is made of a rubber material with a spherical sealing surface, and a radial rubber annular boss is formed on its upper end surface. A pressure ring is pressed onto the upper annular surface of the radial rubber annular boss, and the pressure ring is fixedly mounted on the inner wall of the channel of the exhaust valve seat, and a plurality of axial flow channels are provided between its outer annular surface and the inner wall of the exhaust valve seat channel.

[0006] Preferably, a reinforcing plate is provided inside the upper end surface of the exhaust valve disc inside the pressure ring.

[0007] Preferably, the drain valve flap is made of a rubber material with a conical sealing surface and is installed in the mounting cavity at the outlet of the second drain valve seat sealing surface. A conical cavity is formed on the inner side of the conical sealing surface of the drain valve flap, and a plurality of radial bosses are formed on the circumferential direction of the lower end surface of the drain valve flap. The lower end surface of the radial boss is embedded in the radial inner step on the outlet side of the drain valve seat mounting cavity. The radial boss has a downward inclined surface, and the inner diameter of the groove between two adjacent radial bosses is smaller than the inner diameter of the radial inner step of the mounting cavity. The axial height of the drain valve flap is greater than the axial height of the mounting cavity.

[0008] Preferably, the oil storage chamber is provided with a guide cylinder, a plurality of flow openings are provided on the cylinder wall of the guide cylinder, and the guide cylinder located at the oil inlet pipe and the oil outlet pipe is a closed cylinder wall.

[0009] Preferably, the exhaust buoy and the exhaust buoy are composed of a cylindrical tube and a spherical sealing surface.

[0010] The beneficial effect of the present invention is that an exhaust valve and a drain valve are arranged in the inner cavity of the valve body to simultaneously remove air and water in the hydraulic oil, and the exhaust and drain effects are good, the equipment installation space is small, and the cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the present invention.

[0012] Figure 2 The present invention Figure 1 Schematic diagram of the structure of the middle drain valve.

[0013] Figure 3 The present invention Figure 1 Schematic diagram of the structure of the exhaust valve.

[0014] Figure 4 The present invention Figure 2 Top view of the middle drain valve disc.

[0015] Figure 5 The present invention Figure 3 Top view of the medium pressure ring. DETAILED DESCRIPTION

[0016] like Figure 1The drain and exhaust valve of the hydraulic oil delivery system shown in the figure includes a valve body, the inner cavity of the valve body has a cylindrical oil storage chamber, the oil storage chamber is connected to the oil inlet pipe 7 and the oil outlet pipe 6, the volume of the oil storage chamber is designed according to the inner diameter of the channel of the oil inlet pipe 7 and the oil outlet pipe 6, so that the hydraulic oil entering the oil storage chamber can fully separate the air and water after the flow rate is reduced, and the valve body is composed of an upper valve body 10 and a lower valve body 5 connected by threads or welding, and a sealing ring 9 is arranged between the two; it is characterized in that an exhaust valve is arranged at the upper end of the oil storage chamber, and a drain valve is arranged at the lower end; the exhaust valve includes an exhaust float 8 and an exhaust valve seat 11, the gravity of the exhaust float 8 is less than its overall buoyancy in the oil, and is greater than its buoyancy in the air, and the exhaust valve seat 11 is fixedly and sealedly installed on the valve body at the upper end of the oil storage chamber, and the exhaust The valve seat 11 is composed of a first exhaust valve seat sealing surface and a second exhaust valve seat sealing surface. The first exhaust valve seat sealing surface cooperates with the exhaust float 8 sealing surface to form an exhaust sealing pair. An exhaust valve flap 12 is provided above the second exhaust valve seat sealing surface. The exhaust valve flap 12 cooperates with the second exhaust valve seat sealing surface to form an exhaust check valve. The exhaust check valve prevents the air outside the valve body from entering the oil storage chamber, while the air in the oil storage chamber can be discharged to the outside of the valve body. When the oil level in the oil storage chamber sinks the volume of the exhaust float 8 in the hydraulic oil, the gravity of the exhaust float 8 is greater than its buoyancy and floats up to seal with the exhaust valve seat 11. When the gas in the upper part of the oil storage chamber increases to the point where the buoyancy of the exhaust float 8 is equal to its gravity, as the hydraulic oil level continues to drop, the exhaust float 8 moves down. Open the exhaust valve seat 11 to discharge gas, and the weight of the exhaust float 8 is arbitrarily selected between its buoyancy in the hydraulic oil and its buoyancy in the air. In the present embodiment, the weight of the exhaust float 8 is selected to be equal to the buoyancy of three quarters of its volume in the hydraulic oil; the drain valve comprises a drain float 3 and a drain valve seat 2. The gravity of the drain float 3 is greater than its overall buoyancy in the oil and less than its buoyancy in the water. The drain valve seat 2 is fixedly sealed and mounted on the valve body at the bottom of the oil storage chamber. The drain valve seat 2 consists of a first drain valve seat sealing surface and a second drain valve seat sealing surface. The first drain valve seat sealing surface cooperates with the drain float 3 to form a drain sealing pair. A drain valve flap 1 is provided below the second drain valve seat sealing surface. The drain valve flap 1 and the second drain valve flap 1 are connected to each other. The sealing surfaces of the valve seats cooperate with each other to form a drain one-way valve, which prevents air outside the valve body from entering the oil storage chamber, while water in the oil storage chamber can be discharged to the outside of the valve body. When the oil level in the oil storage chamber sinks the volume of the drain float 3 in the hydraulic oil, the gravity of the drain float 3 is greater than the buoyancy and is pressed and sealed with the drain valve seat 2. When the water level in the oil storage chamber rises to the point where the gravity of the drain float 3 is equal to the buoyancy, as the water level continues to rise, the gravity of the drain float 3 is less than its buoyancy and rises, opening the drain valve to drain water. The weight of the drain float 3 can be arbitrarily selected between its buoyancy in the water and its buoyancy in the hydraulic oil. In this embodiment, the weight of the drain float 3 is selected to be equal to the buoyancy of three quarters of its volume being in the oil and the remaining one quarter of its volume being in the water.

[0017] The exhaust valve flap 12 is made of a rubber material with a spherical sealing surface, and the spherical sealing surface cooperates with the sealing surface of the second exhaust valve seat to form an exhaust one-way valve. A radial rubber annular boss 12A is formed on the upper end surface of the exhaust valve flap 12, and the radial rubber annular boss 12A is integrally injection-molded with the exhaust valve flap 12. A pressing ring 14 is press-fitted on the upper annular surface of the radial rubber annular boss 12A. The pressing ring 14 is fixedly mounted on the inner wall of the channel of the exhaust valve seat 11, and a plurality of axial flow channels are provided between its outer annular surface and the inner wall of the channel of the exhaust valve seat 11. The pressure on its lower end surface causes the radial rubber annular boss 12A to elastically deform downward. When the exhaust float 8 sinks to open the exhaust sealing pair, the gas pressure in the oil storage chamber pushes the exhaust valve disc 12 upward, causing the radial rubber annular boss 12A to deform elastically, pushing the exhaust valve disc 12 away from contacting the sealing surface of the second exhaust valve seat. The exhaust check valve opens to exhaust, and the gas is discharged to the outside of the valve body from the axial flow channel between the pressure ring 14 and the exhaust valve seat 11. After the exhaust is completed, the elastic restoring force of the radial rubber annular boss 12A causes the exhaust valve disc 12 to return to its original position and press and seal with the sealing surface of the second exhaust valve seat to prevent the vacuum negative pressure of the oil storage chamber from sucking air outside the valve body into the oil storage chamber. Figure 3 shown.

[0018] A reinforcing plate 13 is provided inside the upper end surface of the exhaust valve disc 12 inside the pressure ring 14 to prevent the exhaust valve disc 12 from being sucked into the oil storage chamber by negative pressure under vacuum. The exhaust valve seat 11 is made of rubber material, and an annular groove is formed on the inner wall of the channel of the exhaust valve seat 11. An annular convex shoulder 14A is provided at intervals on the outer circumference of the pressure ring 14, and the annular convex shoulder 14A is embedded in the annular groove, and an axial flow channel is formed between two adjacent annular convex shoulders 14A. Figure 3 , Figure 5 shown.

[0019] The drain valve flap 1 is made of a rubber material with a conical sealing surface and is installed in the installation cavity at the outlet of the sealing surface of the second drain valve seat. A conical cavity 15 is formed on the inner side of the conical sealing surface of the drain valve flap 1. A plurality of radial bosses 1A are formed on the circumferential direction of the lower end surface of the drain valve flap 1. The lower end surface of the radial boss 1A is embedded in the radial inner step 2A on the outlet side of the installation cavity of the drain valve seat 2. The radial boss 1A has a downward inclined surface to increase the elastic deformation of the radial boss 1A. The inner diameter of the groove between two adjacent radial bosses 1A is smaller than the inner diameter of the radial inner step 2A of the installation cavity, so that a drainage channel is formed between the groove and the inner hole wall of the radial inner step 2A. The axial height of the drain valve flap 1 is greater than the axial height of the installation cavity, so that there is an elastic preload force between the drain valve flap 1 and the sealing surface of the second drain valve seat. Figure 2 , Figure 4When the drainage buoy 3 floats up, water enters the conical cavity 15 and exerts downward pressure on the drainage valve disc 1, causing the conical cavity 15 to shrink, and the diameter of the conical opening at the upper end thereof to shrink. The conical sealing surface of the drainage valve disc 1 shrinks inwards and forms a gap with the sealing surface of the second drainage valve seat, and water is discharged from the drainage flow channel to the valve body through the gap; when the oil storage chamber is vacuum, the negative pressure exerts an upward suction force on the drainage valve disc 1, causing the diameter of the conical opening at the upper end of the conical cavity 15 to expand, and the conical sealing surface of the drainage valve disc 1 and the sealing surface of the second drainage valve seat are pressed and sealed to prevent air from being sucked into the oil storage chamber.

[0020] The oil storage chamber is provided with a guide cylinder 4, and a plurality of flow openings are provided on the cylinder wall of the guide cylinder 4. The guide cylinder 4 located at the oil inlet pipe 7 and the oil outlet pipe 6 is a closed cylinder wall, which improves the water and gas separation efficiency of the hydraulic oil. Figure 1 shown.

[0021] The exhaust buoy 8 and the drainage buoy 3 are composed of a cylindrical tube and a spherical sealing surface. The spherical sealing surface of the exhaust buoy 8 faces upward and forms a sealing pair with the exhaust valve seat 11, and the spherical sealing surface of the drainage buoy 3 faces downward and forms a sealing pair with the drainage valve seat 2. Figure 1 shown.

Claims

1. A drain and exhaust valve for a hydraulic oil delivery system, comprising a valve body, wherein the inner cavity of the valve body has a cylindrical oil storage chamber, the oil storage chamber is connected to an oil inlet pipe (7) and an oil outlet pipe (6); wherein the valve body has a cylindrical oil storage chamber, the oil storage chamber is connected to an oil inlet pipe (7) and an oil outlet pipe (6); An exhaust valve is arranged at the upper end of the oil storage chamber, and a drain valve is arranged at the lower end; the exhaust valve comprises an exhaust float (8) and an exhaust valve seat (11); the weight of the exhaust float (8) is less than the buoyancy of the exhaust float as a whole in the oil, but greater than the buoyancy of the exhaust float in the air; the exhaust valve seat (11) is fixedly and sealingly mounted on the valve body at the upper end of the oil storage chamber; the exhaust valve seat (11) comprises a first exhaust valve seat sealing surface and a second exhaust valve seat sealing surface; the first exhaust valve seat sealing surface and the exhaust float (8) sealing surface cooperate with each other to form an exhaust sealing pair; an exhaust valve flap (12) is arranged above the second exhaust valve seat sealing surface; the exhaust valve flap (12) and the second exhaust valve seat The sealing surfaces cooperate with each other to form an exhaust check valve; the drain valve comprises a drain buoy (3) and a drain valve seat (2); the gravity of the drain buoy (3) is greater than its overall buoyancy in oil and less than its buoyancy in water; the drain valve seat (2) is fixedly sealed and installed on the valve body at the bottom of the oil storage chamber; the drain valve seat (2) consists of a first drain valve seat sealing surface and a second drain valve seat sealing surface; the first drain valve seat sealing surface and the drain buoy (3) cooperate with each other to form a drain sealing pair; a drain valve flap (1) is provided below the second drain valve seat sealing surface; the drain valve flap (1) and the second drain valve seat sealing surface cooperate with each other to form a drain check valve; The exhaust valve flap (12) is made of a rubber material having a spherical sealing surface. The upper end surface of the exhaust valve flap (12) is provided with a radial rubber annular boss (12A). A pressing ring (14) is press-fitted onto the upper annular surface of the radial rubber annular boss (12A). The pressing ring (14) is fixedly mounted on the inner wall of the channel of the exhaust valve seat (11). A plurality of axial flow channels are provided between the outer annular surface of the pressing ring and the inner wall of the channel of the exhaust valve seat (11). A reinforcing plate (13) is provided inside the upper end surface of the exhaust valve disc (12) inside the pressure ring (14); The drain valve flap (1) is made of a rubber material having a conical sealing surface and is installed in the installation cavity at the outlet of the sealing surface of the second drain valve seat. A conical cavity (15) is formed inside the conical sealing surface of the drain valve flap (1). A plurality of radial convex shoulders (1A) are formed in the circumferential direction of the lower end surface of the drain valve flap (1). The lower end surface of the radial convex shoulder (1A) is embedded in the radial inner step (2A) on the outlet side of the installation cavity of the drain valve seat (2). The radial convex shoulder (1A) has a downward inclined surface. The inner diameter of the groove between two adjacent radial convex shoulders (1A) is smaller than the inner diameter of the radial inner step (2A) of the installation cavity. The axial height of the drain valve flap (1) is greater than the axial height of the installation cavity. The exhaust buoy (8) and the drainage buoy (3) are composed of a cylindrical tube and a spherical sealing surface.

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