CN115822928A

CN115822928A - Pressure adjustable compressor oil spilling valve

Info

Publication number: CN115822928A
Application number: CN202211619831.8A
Authority: CN
Inventors: 李红; 钱伟强; 高海平; 宋满华; 卢文青; 吴刚
Original assignee: Sinopec Oilfield Equipment Corp; Research Institute of Sinopec Oilfield Equipment Co Ltd
Current assignee: Sinopec Oilfield Equipment Corp; Research Institute of Sinopec Oilfield Equipment Co Ltd
Priority date: 2022-12-15
Filing date: 2022-12-15
Publication date: 2023-03-21

Abstract

The invention discloses a pressure adjustable compressor oil spill valve, comprising: the piston mechanism comprises two first pistons which are arranged at intervals along the axial direction of the shell, a spring is arranged between the two first pistons, the first piston positioned below the first pistons is also fixedly connected with one end of a piston rod, the other end of the piston rod is connected with an oil overflow bead, and the piston mechanism separates the interior of the shell into an air cavity and a hydraulic cavity; the connecting body is internally provided with a communicating channel communicated with the hydraulic cavity, and the communicating channel is communicated with an oil cylinder of the compressor; and the pressurizing device is packaged at one end of the shell, which is far away from the connecting body, and is communicated with the air cavity, and applies pressure on the piston mechanism to drive the oil spilling beads to compress the communicating channel. The invention sets the oil spilling pressure through the supercharging device, is suitable for the oil spilling pressure requirements under different working conditions, and can reduce the engineering cost.

Description

Pressure adjustable compressor oil spilling valve

Technical Field

The invention relates to the field of compressor oil spill valves. More particularly, the present invention relates to a pressure adjustable compressor spill valve.

Background

In the diaphragm compressor, a piston pushes hydraulic oil to reciprocate, loss of the hydraulic oil is supplemented by a plunger pump, and in order to ensure that the highest pressure of the hydraulic oil in an oil cylinder is unchanged, redundant oil in the oil cylinder is generally discharged to the outside of the oil cylinder through an oil overflow valve so as to ensure the safety of the diaphragm compressor. However, the oil spilling pressure of the common oil spilling valve is usually set by factory leaving, and the common oil spilling valve is difficult or inconvenient to adjust manually according to actual needs, so that the oil spilling valve with different oil spilling pressures needs to be replaced to match with the diaphragm compressor working under different working conditions, which undoubtedly increases the engineering cost.

Disclosure of Invention

The invention also aims to provide a pressure-adjustable compressor oil spilling valve, which is used for setting oil spilling pressure through a supercharging device, is suitable for oil spilling pressure requirements under different working conditions, and can reduce engineering cost.

To achieve these objects and other advantages in accordance with the purpose of the invention, a pressure adjustable compressor spill valve is provided, comprising:

the piston mechanism separates the interior of the shell into an air cavity and a hydraulic cavity, an oil overflow port is arranged on the shell, and the oil overflow port is communicated with the hydraulic cavity;

the connecting body is packaged at one end of the shell, which is provided with the oil overflow bead, a communicating channel communicated with the hydraulic cavity is formed in the connecting body, the opening degree of the communicating channel is smaller than the diameter of the oil overflow bead, and the communicating channel is communicated with an oil cylinder of the compressor;

the pressurizing device is packaged at one end, far away from the connecting body, of the shell and is communicated with the air cavity, the pressurizing device applies pressure to the piston mechanism to drive the oil spilling beads to press the communicating channel so as to seal the communicating channel.

Preferably, the supercharging device comprises a top cover packaged at the end part of the shell, the top cover is provided with an air suction pipeline and an exhaust pipeline which are communicated with the air cavity, and the air suction pipeline and the exhaust pipeline are both provided with one-way valves.

Preferably, the unloading device is encapsulated on the side wall of the shell, and comprises:

the hydraulic oil-water mixing valve comprises a valve sleeve, a valve cavity and a sealing cover, wherein the valve sleeve is internally provided with the valve cavity, one end of the valve sleeve is provided with the sealing end cover, the other end of the valve sleeve is in threaded connection with a gland, the sealing end cover is provided with an oil inlet, the oil inlet is communicated with a communicating channel through a hydraulic oil pipeline, the valve sleeve is provided with an oil outlet, and the oil inlet and the oil outlet are both communicated with the valve cavity;

the second piston is fixedly arranged inside the valve cavity, a valve rod is movably arranged on the second piston, a ball head is arranged at one end, close to the sealing end cover, of the valve rod, the diameter of the ball head is larger than the opening degree of the oil inlet, a spring is fixedly connected between one end, not provided with the ball head, of the valve rod and the gland, and the gland applies pressure to the spring and the valve rod so as to drive the ball head to compress and seal the oil inlet.

Preferably, the second piston is provided with a plurality of flow channels, and the oil outlet is located between the second piston and the gland.

Preferably, the unloading pressure in the unloading device is 1.2 times of the oil spilling pressure of the oil cylinder of the compressor.

Preferably, a needle valve is arranged at the oil spilling position, and an adjusting handle is arranged at the tail end of the needle valve.

Preferably, two first pistons are oppositely and fixedly provided with spring seats, and two ends of a spring connected with the two first pistons are respectively and fixedly connected with the two spring seats; the gland with the valve rod is last to be fixed and to be equipped with the same spring holder, with the gland with the both ends of the spring that the valve rod is connected respectively with two spring holder fixed connection.

Preferably, the bottom of the connecting body is provided with a conical surface sealing joint, and the communicating channel is connected with the oil cylinder of the compressor through the conical surface sealing joint.

The invention at least comprises the following beneficial effects:

1. the oil spill valve can adjust the pressure applied to the piston mechanism by the supercharging device according to the actual working condition so as to adjust the force of the oil spill bead against the communicating channel, and further set the oil spill pressure, is suitable for the oil spill pressure requirements under different working conditions, and has the advantage of reducing the engineering cost;

2. the oil overflow valve is also provided with an unloading device, and when the piston mechanism is blocked and hydraulic oil cannot jack oil overflow drops, the hydraulic oil is discharged from the unloading device so as to ensure the safety of the compressor;

3. the oil spill valve has the functions of oil spill and unloading, but only has one main oil way of a communicating channel, so that the number of the oil way channels is reduced, and the risk of oil leakage is greatly reduced.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic side view of the present invention;

FIG. 2 is a schematic cross-sectional view of the housing and piston mechanism of the present invention;

FIG. 3 is a schematic cross-sectional view of an unloader according to the present invention;

description reference numbers indicate:

1. the oil-gas separation device comprises a shell, 2, a first piston, 3, a spring, 4, a piston rod, 5, an oil spilling bead, 6, an air cavity, 7, a hydraulic cavity, 8, a conical sealing joint, 9, a connecting body, 10, a communication channel, 11, a top cover, 12, an air suction pipeline, 13, an exhaust pipeline, 14, an unloading device, 15, a valve sleeve, 16, a sealing end cover, 17, a pressing cover, 18, an oil inlet, 19, an oil outlet, 20, a second piston, 21, a valve rod, 22, a ball head, 23, a needle valve, 24, an adjusting handle, 25, a spring seat, 26 and a circulation channel.

Detailed Description

The present invention is described in further detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It should be noted that in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

As shown in fig. 1 to 3, the present invention provides a pressure-adjustable compressor oil spill valve, comprising:

the piston type air conditioner comprises a shell 1, a slidable piston mechanism is installed inside the shell 1, the piston mechanism comprises two first pistons 2 which are arranged along the axial direction of the shell 1 at intervals, any one first piston 2 can slide along the inner side wall of the shell 1, a spring 3 is arranged between the two first pistons 2, the first piston 2 positioned below is also fixedly connected with one end of a piston rod 4, the other end of the piston rod 4 is connected with an oil overflow bead 5, the piston mechanism separates the interior of the shell 1 into an air cavity 6 and a hydraulic cavity 7, an oil overflow port is arranged on the shell 1, and the oil overflow port is communicated with the hydraulic cavity 7;

the connecting body 9 is packaged at one end, provided with the oil overflow bead 5, of the shell 1, a communicating channel 10 communicated with the hydraulic cavity 7 is formed inside the connecting body 9, the opening degree of the communicating channel 10 is smaller than the diameter of the oil overflow bead 5, and the communicating channel 10 is communicated with an oil cylinder of a compressor;

and the pressurizing device is packaged at one end of the shell 1, which is far away from the connecting body 9, is communicated with the air cavity 6, applies pressure on the piston mechanism, and drives the oil overflow bead 5 to tightly press the communication channel 10 so as to seal the communication channel 10.

In the above technical solution, as shown in fig. 1-2, the oil spill valve includes a pressurizing device, a housing 1 and a connector 9, which are sequentially arranged, a piston mechanism is arranged inside the housing 1, the piston mechanism includes two first pistons 2 connected together through a spring 3, the first piston 2 located below is also connected with a piston rod 4 with an oil spill 5, an air cavity 6 is formed between the first piston 2 located above and the housing 1, and the air cavity 6 is communicated with the pressurizing device; a hydraulic cavity 7 is formed between the first piston 2 and the shell 1, the hydraulic cavity 7 is communicated with a communication channel 10 on the connector 9, the communication channel 10 is also connected with an oil cylinder of the compressor, and hydraulic oil in the oil cylinder of the compressor can enter the hydraulic cavity 7 through the communication channel 10 and then overflows through an oil overflow port;

the pressurizing device applies pressure on the first piston 2 positioned above, the first piston 2 extrudes the spring 3, and applies pressure on the first piston 2 positioned below, the piston rod 4 and the oil spilling bead 5 so as to tightly press the oil spilling bead 5 on the communication channel 10 to seal the communication channel 10; according to the actual working condition, the pressure applied on the piston mechanism by the supercharging device is adjusted so as to adjust the force of the oil spilling bead 5 tightly propping against the communication channel 10, and further the oil spilling pressure is set; when the pressure of the hydraulic oil in the oil cylinder rises to be higher than the set oil spilling pressure, the hydraulic oil can prop open the oil spilling bead 5, then the hydraulic oil enters the hydraulic cavity 7 and is discharged from the oil spilling port, so that oil discharge is realized, and the pressure stability of the hydraulic oil in the oil cylinder is ensured; when the hydraulic oil in the oil cylinder is lower than the set oil spilling pressure, the oil spilling beads 5 tightly jack and block the communication channel 10 again, so that the hydraulic oil is prevented from leaking; the invention sets the oil spilling pressure through the supercharging device, is suitable for the oil spilling pressure requirements under different working conditions, and can reduce the engineering cost.

In another technical scheme, the supercharging device comprises a top cover 11 packaged at the end of the shell 1, wherein an air suction pipeline 12 and an exhaust pipeline 13 communicated with the air cavity 6 are arranged on the top cover 11, and one-way valves are arranged on the air suction pipeline 12 and the exhaust pipeline 13.

In this technical scheme, supercharging device carries out the concrete expression that sets up to oil spilling pressure: the one-way valve on the exhaust pipeline 13 is closed, the one-way valve on the air suction pipeline 12 is opened, air is sucked into the air cavity 6 through the air suction pipeline 12, so that pressure is exerted on the piston mechanism, the pressure exerted on the piston mechanism is adjusted by controlling the air inflow into the air cavity 6, so that oil spilling pressure is set, the one-way valve on the air suction pipeline 12 is closed after the oil spilling pressure is set, after oil is discharged, the one-way valve on the exhaust pipeline 13 is opened, the air in the air cavity 6 is discharged, and the piston mechanism is reset; the top cover 11 is packaged at the end part of the shell 1, and the top cover 11 is provided with the exhaust pipeline 13 and the air suction pipeline 12 which are provided with one-way valves, so that the whole sealing performance of the oil spill valve is ensured; and through the mutual cooperation of two check valves, reset piston mechanism after the oil extraction, when being convenient for next operation, also improved the accuracy of the oil spilling pressure that sets up.

In another technical solution, as shown in fig. 3, the unloading device 14 is further included and is encapsulated on a side wall of the housing 1, and the unloading device 14 includes:

a valve sleeve 15 with a valve cavity therein is arranged, one end of the valve sleeve 15 is provided with a sealing end cover 16, the other end of the valve sleeve is in threaded connection with a gland 17, an oil inlet 18 is arranged on the sealing end cover 16, the oil inlet 18 is communicated with the communicating channel 10 through a hydraulic oil pipeline, an oil outlet 19 is arranged on the valve sleeve 15, and the oil inlet 18 and the oil outlet 19 are both communicated with the valve cavity;

the second piston 20 is fixedly arranged in the valve cavity, a valve rod 21 is movably arranged on the second piston 20, a ball head 22 is arranged at one end, close to the sealing end cover 16, of the valve rod 21, the diameter of the ball head 22 is larger than the opening degree of the oil inlet 18, a spring 3 is fixedly connected between one end, not provided with the ball head 22, of the valve rod 21 and the gland 17, and the gland 17 applies pressure to the spring 3 and the valve rod 21 so as to drive the ball head 22 to press and seal the oil inlet 18.

In the technical scheme, the oil pressure of the high-pressure diaphragm compressor is higher than 100MPa, if the oil overflow valve fails to discharge excessive oil, the oil pressure continues to increase suddenly, so that potential safety hazards are brought to the compressor, membrane heads, membranes or high-pressure pipelines are broken, and the safety of field personnel is endangered, namely, an unloading device 14 is additionally arranged on the oil overflow valve and used for discharging hydraulic oil from the unloading device 14 when the piston mechanism is blocked and the hydraulic oil cannot jack the oil overflow bead 5, so that the safety of the compressor is guaranteed; the unloading device 14 comprises a valve sleeve 15 packaged on the shell 1, a valve cavity is arranged inside the valve sleeve 15, a second piston 20 is arranged in the valve cavity, a valve rod 21 is arranged on the second piston 20 in a sliding mode, a ball head 22 is arranged at one end of the valve rod 21, a spring 3 connected with a gland 17 is arranged at the other end of the valve rod 21, the spring 3 is in threaded connection with the valve sleeve 15 through the gland 17 to compress the spring 3, the ball head 22 is abutted against an oil inlet 18, the oil inlet 18 is communicated with the communication channel 10 through a hydraulic oil pipeline, pressing force on the spring 3 is adjusted through rotating the gland 17, unloading pressure is further adjusted, when hydraulic oil cannot overflow from an oil overflow port due to the fault of the oil overflow valve, oil pressure can be further increased, when the oil pressure is increased to the set unloading pressure, the hydraulic oil flows through the communication channel 10 and the hydraulic oil pipeline, the ball head 22 is abutted against the oil inlet 18, enters the valve cavity and is discharged from the oil outlet 19, after oil discharge is finished, the oil discharge, the spring 3 rebounds to an initial state, the oil outlet 19 can be communicated with an external oil tank through a hydraulic pipeline, so that the discharged hydraulic oil can be recycled, and resources can be saved; the oil spill valve has the functions of oil spill and unloading, but only is provided with the main oil way of the communicating channel 10, so that the number of the oil way channels is reduced, and the oil leak risk is greatly reduced.

In another technical solution, a plurality of flow channels 26 are opened on the second piston 20, and the oil outlet 19 is located between the second piston 20 and the gland 17.

In the technical scheme, a plurality of flow channels 26 are formed in the second piston 20, when the pressure of hydraulic oil is higher than a set unloading pressure, the hydraulic oil jacks the ball head 22 to enter a valve cavity between the end cover and the second piston 20, and then enters the valve cavity between the second piston 20 and the gland 17 through the flow channels 26 in the second piston 20, and then is discharged through the oil outlet 19; the second piston 20 is provided with a circulation duct 26 to divide hydraulic oil entering the unloading device 14 to reduce the impact force of the hydraulic oil, and the oil outlet 19 is located between the second piston 20 and the gland 17, so that the stroke of the hydraulic oil in the unloading device 14 is prolonged, the impact force of the hydraulic oil is further reduced, and the unloading oil discharge vibration reducing device has the effect of reducing vibration and noise generated during unloading oil discharge.

In another technical scheme, the unloading pressure in the unloading device 14 is 1.2 times of the oil spilling pressure of the oil cylinder of the compressor.

In the technical scheme, the unloading pressure set during working is 1.2 times of the oil spilling pressure, and when the unloading pressure is 1.2 times of the oil spilling pressure, even if the hydraulic oil in the oil cylinder of the compressor cannot be discharged, the oil pressure is increased in the range, and the compressor cannot be influenced.

In another technical scheme, a needle valve 23 is arranged at the oil spilling position, and an adjusting handle 24 is arranged at the tail end of the needle valve 23.

In the technical scheme, the valve core of the needle valve 23 can rotate along with the rotation of the adjusting handle 24 and adjust the opening degree of the valve port of the needle valve 23, so that the flow rate of the outward oil spilling of the needle valve 23 is controlled; the needle valve 23 is used for controlling the flow speed of oil spilling outwards from the needle valve 23 when oil spilling starts so as to reduce the impact force of the spilled oil; on the other hand is used for when the oil spilling is fast finished, the velocity of flow of the outside oil spilling of control oil spilling mouth prevents that hydraulic oil from pushing open oil spilling pearl 5 under very big dynamics, but after the oil spilling, the dynamics of pushing open disappears suddenly, and the speed that spring 3 kick-backs down is too fast, drives piston mechanism and shakes, damages the part.

In another technical scheme, spring seats 25 are oppositely and fixedly arranged on the two first pistons 2, and two ends of a spring 3 connected with the two first pistons 2 are respectively and fixedly connected with the two spring seats 25; the gland 17 and the valve rod 21 are fixedly provided with the same spring seats 25, and two ends of the spring 3 connected with the gland 17 and the valve rod 21 are respectively and fixedly connected with the two spring seats 25.

In the technical scheme, the spring seat 25 is arranged, so that the service life of the spring 3 is ensured, and the blocking phenomenon is avoided.

In another technical scheme, a conical sealing joint 8 is arranged at the bottom of the connecting body 9, and the communication channel 10 is connected with an oil cylinder of the compressor through the conical sealing joint 8.

In the technical scheme, the conical surface sealing joint 8 is connected with the oil cylinder, so that the sealing performance between the connecting body 9 and the oil cylinder is ensured, and the leakage risk of high-pressure oil is further reduced.

While embodiments of the invention have been described above, it is not intended to be limited to the details shown, described and illustrated herein, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed, and to such extent that such modifications are readily available to those skilled in the art, and it is not intended to be limited to the details shown and described herein without departing from the general concept as defined by the appended claims and their equivalents.

Claims

1. A pressure adjustable compressor spill valve, comprising:

the piston mechanism separates the interior of the shell into an air cavity and a hydraulic cavity, an oil overflow port is arranged on the shell and is communicated with the hydraulic cavity;

2. The pressure adjustable compressor oil spill valve of claim 1, wherein the pressurizing device comprises a top cover sealed at the end of the housing, the top cover is provided with an air suction pipeline and an air exhaust pipeline communicated with the air chamber, and the air suction pipeline and the air exhaust pipeline are both provided with one-way valves.

3. The pressure adjustable compressor spill valve of claim 1, further comprising an unloading device encapsulated in a sidewall of said housing, said unloading device comprising:

4. The pressure adjustable compressor spill valve of claim 3, wherein said second piston defines a plurality of flow passages, said oil outlet being disposed between said second piston and said gland.

5. A pressure adjustable compressor spill valve as claimed in claim 3, wherein the unloading pressure in said unloading means is 1.2 times the spill pressure of the compressor cylinder.

6. The pressure adjustable compressor oil spill valve as claimed in claim 1, wherein a needle valve is provided at the oil spill port, and an adjusting handle is provided at a distal end of the needle valve.

7. The pressure-adjustable compressor spill valve as claimed in claim 3, wherein two first pistons are oppositely and fixedly provided with spring seats, and both ends of the spring connected with the two first pistons are fixedly connected with the two spring seats respectively; the gland with the valve rod is last to be fixed and to be equipped with the same spring holder, with the gland with the both ends of the spring that the valve rod is connected respectively with two spring holder fixed connection.

8. The pressure adjustable compressor spill valve of claim 1, wherein the bottom of said connecting body is provided with a conical sealing joint, and said communicating channel is connected to a cylinder of said compressor through the conical sealing joint.