CN214331579U - Reversing control oil throttling structure of hydraulic control reversing valve of hydraulic natural gas compressor - Google Patents

Abstract

A reversing control oil throttling structure of a hydraulic control reversing valve of a hydraulic natural gas compressor comprises a valve block, wherein a first oil duct is arranged in the valve block, a third oil duct is arranged in the valve block and is communicated with the first oil duct through a throttling hole in the valve block, a built-in throttling device is arranged in the valve block and corresponds to the throttling hole, the built-in throttling device comprises a regulating valve core and a transition connecting sleeve, the transition connecting sleeve is in threaded connection with a mounting hole in the valve block, a overflowing cavity for communicating the third oil duct with the throttling hole is reserved in the mounting hole, the regulating valve core is in threaded fit with the transition connecting sleeve, the front end of the regulating valve core is conical and extends into the throttling hole, an overflowing gap is formed between the front end and the throttling hole, the overflowing gap is locked through a locking nut, a polygonal limiting boss is arranged at the outer end of the transition connecting sleeve, and an anti-rotating limiting stopper is arranged at a position, close to the transition connecting sleeve, on the valve block and corresponds to the limiting boss, the periphery of the anti-rotation limiting block is provided with at least two straight edges for limiting, so that the transition connecting sleeve is prevented from loosening.

Description

Reversing control oil throttling structure of hydraulic control reversing valve of hydraulic natural gas compressor

Technical Field

The utility model relates to a hydraulic pressure natural gas compressor equipment field, in particular to switching-over control oil throttle structure of hydraulic pressure natural gas compressor liquid accuse switching-over valve.

Background

The compression cylinder of the hydraulic natural gas compressor is a main working component of the compressor, the working performance of the compression cylinder is determined by the reversing action characteristic of the hydraulic control reversing valve, and the reversing action characteristic of the hydraulic control reversing valve has a direct relation with the flow rate of reversing control oil, so that the reversing control oil with stable flow rate is very important in the working process of the compressor. The reversing control oil is formed by throttling pressure oil through a throttling device on a valve block, the conventional throttling device is characterized in that an oil supply oil channel opening arranged on the valve block is connected with an external oil pipe, a throttling valve is arranged on the external oil pipe, the downstream end of the throttling valve is connected with a first interface of a tee joint through an oil pipe, an overflow valve arranged on the valve block is connected with a second interface of the tee joint through an external overflow pipe, a third interface of the tee joint is connected with an external output pipeline, during operation, the control oil is throttled through the throttling valve from the external oil pipe and flows into the output pipeline through the tee joint, oil of the overflow pipe of the overflow valve is converged into the output oil pipe through the tee joint, and the reversing control oil of the hydraulic control reversing valve is formed on the output oil pipe. The throttling device needs to be externally connected with a steel pipe, so that the occupied space is increased, the cost is increased, and the regulating handle of the throttling valve arranged on the external oil pipe cannot be locked, so that the throttling device is easily touched by people to rotate or the handle is touched by misoperation of personnel, so that the throttling performance of the throttling valve is changed, the supply flow of reversing control oil of the hydraulic control reversing valve is changed, the reversing action characteristic of the hydraulic control reversing valve is changed, and the working performance of a compression cylinder is influenced.

Disclosure of Invention

The utility model discloses a solve the problem that above prior art exists, provide a switching-over control oil throttle structure of hydraulic natural gas compressor liquid accuse switching-over valve, can export the switching-over control oil of stable flow, the technical scheme of the utility model as follows:

a reversing control oil throttling structure of a hydraulic control reversing valve of a hydraulic natural gas compressor comprises a valve block of the hydraulic control reversing valve, wherein a first oil duct for providing pressure oil is arranged in the valve block, a third oil duct for outputting control oil is arranged in the valve block, the third oil duct is communicated with the first oil duct through a throttling hole arranged in the valve block, a built-in throttling device is arranged in the valve block and corresponds to the throttling hole, the built-in throttling device comprises a regulating valve core and a transition connecting sleeve, the transition connecting sleeve is in threaded connection and sealing with a mounting hole in the valve block through external threads, a flow passing cavity for communicating the third oil duct with the throttling hole is reserved in the mounting hole, the regulating valve core is in threaded fit and sealing with internal threads in the transition connecting sleeve through threads, the front end of the regulating valve core is in a conical structure, the small end of the front end can extend into the throttling hole, and the diameter of the large end of the front end is larger than the aperture of the throttling hole, the adjustable front end of the adjusting valve element and the overflow gap of the throttling hole are adjusted by screwing, the overflow gap of the adjusting valve element is locked by a locking nut, one end of the transition connecting sleeve, which extends out of the valve block, is provided with a polygonal limiting boss, the position, which is close to the transition connecting sleeve, of the valve block is provided with an anti-rotation limiting block through a screw fixed mounting, the anti-rotation limiting block corresponds to the limiting boss, at least two limiting straight edges are arranged at different positions of the periphery of the anti-rotation limiting block, wherein the distance from the first limiting straight edge to the axis of the screw is larger than the distance from the second limiting straight edge to the axis of the screw, the limiting straight edges at different positions can form anti-rotation limiting according to the rotation angle of the polygonal limiting boss after the transition connecting sleeve is mounted and fixed, and one limiting straight edge of the anti-rotation limiting block is selected to abut against the edge of the limiting boss, so that the transition connecting sleeve is prevented from rotating and loosening.

The valve block is provided with an overflow valve, a second oil duct is arranged in the valve block, the upstream end of the second oil duct is communicated with the overflow valve, and the downstream end of the second oil duct is communicated with a third oil duct.

And the downstream end of the second oil duct is communicated with the overflowing cavity in the valve block.

And a third limiting straight edge is arranged on the periphery of the anti-rotation limiting block, and the distance from the third limiting straight edge to the axis of the screw is smaller than the distance from the second limiting straight edge to the axis of the screw.

The mounting hole on the valve block is a stepped hole, the center of the hole bottom of the stepped hole is a throttling hole, the small-diameter section of the stepped hole is an internal thread section, the large-diameter section of the stepped hole is a smooth section, the front section of the transition connecting sleeve is provided with an external thread which is in threaded fit with the small-diameter section of the mounting hole, the rear section of the transition connecting sleeve is provided with an annular groove, a first sealing ring is arranged in the annular groove, and the first sealing ring is in contact with the smooth section of the mounting hole to form sealing.

The shaft center hole of the transition coupling sleeve is a stepped hole, the middle section of the stepped hole is a smooth small-diameter section, two ends of the stepped hole are large-diameter sections, a second sealing ring is arranged in the large-diameter section at the front end of the stepped hole, an internal thread is arranged at the large-diameter section at the rear end, the adjusting valve core is a stepped shaft, the small-diameter section at the front section of the stepped shaft is a smooth section, the smooth section is sealed with the transition coupling sleeve through the second sealing ring, and the large-diameter section at the rear section is matched with the internal thread of the transition coupling sleeve in a threaded mode to adjust the flow passing gap.

And the end part of the regulating valve core, which is positioned outside the valve block, is provided with a structure for applying torsion.

And the downstream end of the third oil duct of the valve block is fixedly connected with a pipe joint for connecting an output pipeline.

Adopt above-mentioned technical scheme: the hydraulic control reversing valve comprises a valve block of a hydraulic control reversing valve, wherein a first oil duct for providing pressure oil is arranged in the valve block, a third oil duct for outputting control oil is arranged in the valve block, the third oil duct is communicated with the first oil duct through a throttling hole arranged in the valve block, a built-in throttling device is arranged in the valve block and corresponds to the throttling hole, the built-in throttling device comprises a regulating valve core and a transition connecting sleeve, the transition connecting sleeve is in threaded connection and sealing with a mounting hole in the valve block through external threads, a flow passing cavity for communicating the third oil duct with the throttling hole is reserved in the mounting hole, the regulating valve core is matched and sealed with internal threads in the transition connecting sleeve through threads, the front end head of the regulating valve core is in a conical structure, the small end of the front end head can extend into the throttling hole, the diameter of the large end head is larger than the aperture of the throttling hole, and the flow passing gap between the front end head and the throttling hole can be adjusted by screwing the regulating valve core, the adjusting valve element overflowing clearance is locked through a locking nut, one end of the transition connecting sleeve, which extends out of the valve block, is provided with a polygonal limiting boss, the position, close to the transition connecting sleeve, of the valve block corresponds to the limiting boss through a screw fixed mounting anti-rotation limiting block, at least two limiting straight edges are arranged at different positions of the periphery of the anti-rotation limiting block, the distance from the first limiting straight edge to the axis of the screw is larger than the distance from the second limiting straight edge to the axis of the screw, the limiting straight edges of the different positions can select one limiting straight edge of the anti-rotation limiting block to abut against the edge of the limiting boss to form anti-rotation limiting limits according to the rotation angle of the polygonal limiting boss after the transition connecting sleeve is mounted and fixed, and the transition connecting sleeve is prevented from rotating and loosening. The throttling structure has the advantages that the built-in throttling device is installed on the valve block, the trouble of externally connecting a steel pipe is eliminated, the occupied space is reduced, the cost is reduced, the adjusting valve core is locked by the locking nut, the transition connecting sleeve is limited by the anti-rotation limiting block, the looseness of the transition connecting sleeve caused by adjusting the adjusting valve core is prevented, the looseness of the transition connecting sleeve in the using process is prevented, the problem that the throttling effect is changed due to the fact that personnel touch the handle by mistake is also prevented, the throttling performance of the throttling structure is stable, the output reversing control oil flow is stable, and the reversing performance of the hydraulic control reversing valve and the stability of the work of the compression cylinder are guaranteed.

The overflow valve is mounted on the valve block, the second oil duct is arranged in the valve block, the upstream end of the second oil duct is communicated with the overflow valve, the downstream end of the second oil duct is communicated with the third oil duct, and pressure oil in the second oil duct is converged with pressure oil flowing out of the throttling hole in the overflow cavity and then flows into the third oil duct.

And a third limiting straight edge is arranged on the periphery of the anti-rotation limiting block, the distance from the third limiting straight edge to the axis of the screw is smaller than the distance from the second limiting straight edge to the axis of the screw, and when the transitional coupling sleeve is installed in place and the angle of the polygonal limiting boss is positioned on the central connecting line of the screw and the adjusting valve core, the third limiting straight edge of the anti-rotation limiting block is used for limiting.

The mounting hole on the valve block is a stepped hole, the center of the hole bottom of the stepped hole is a throttling hole, the small-diameter section of the stepped hole is an internal thread section, the large-diameter section is a smooth section, the front section of the transition connecting sleeve is provided with an external thread which is in threaded fit with the small-diameter section of the mounting hole, the rear section of the transition connecting sleeve is provided with an annular groove, a first sealing ring is arranged in the annular groove, and the first sealing ring is in contact with the smooth section of the mounting hole to form sealing, so that the transition connecting sleeve is in sealing connection with the mounting hole on the valve block.

The invention is further described with reference to the drawings and the specific embodiments.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a view from the C-C direction of FIG. 1;

FIG. 3 is an enlarged view of FIG. 1 at B;

FIG. 4 is a schematic structural view of a built-in throttling device and an anti-rotation limiting block;

FIG. 5 is a schematic diagram of the structure of the first oil passage, the throttle hole, the second oil passage, and the mounting hole in the valve block;

FIG. 6 is a schematic structural view of a transition coupling sleeve;

FIG. 7 is a schematic diagram of a regulator cartridge;

FIG. 8 is a schematic structural view of an anti-rotation stopper having two straight side stoppers;

fig. 9 is a schematic structural view of an anti-rotation limiting block with three limiting straight edges.

Detailed Description

The utility model discloses an embodiment of switching-over control oil throttle structure of hydraulic pressure natural gas compressor liquid accuse switching-over valve:

referring to fig. 1-4, a reversing control oil throttling structure of a hydraulic control reversing valve of a hydraulic natural gas compressor comprises a valve block 1 of the hydraulic control reversing valve, a first oil channel 2 for providing pressure oil is arranged in the valve block 1, a third oil channel 11 for outputting control oil is arranged in the valve block 1, the third oil channel 11 is communicated with the first oil channel 2 through a throttling hole 13 arranged in the valve block 1, a built-in throttling device 3 is arranged in the valve block 1 and corresponds to the throttling hole 13, the built-in throttling device 3 comprises a regulating valve core 4 and a transition connecting sleeve 5, the transition connecting sleeve 5 is in threaded connection and sealing with a mounting hole 18 on the valve block 1 through external threads, the mounting hole 18 on the valve block 1 is a stepped hole, the center of the bottom of the stepped hole is the throttling hole 13, the small-diameter section of the stepped hole is an internal thread section, the large-diameter section is a smooth section, the front section of the transition connecting sleeve 5 is provided with external threads matched with the small-diameter section of the mounting hole 18, the rear section is provided with an annular groove 20, a first sealing ring 14 is arranged in the annular groove 20, and the first sealing ring 14 is contacted with the smooth section of the mounting hole 18 to form sealing, so that the transition connecting sleeve 5 is connected with the mounting hole 18 on the valve block 1 in a sealing way. The mounting hole 18 is provided with a flow passage cavity 12 communicating the third oil passage 11 with the orifice 13, the adjusting valve core 4 is matched and sealed with an internal thread 21 in the transition coupling sleeve 5 through a thread, the shaft center hole of the transition coupling sleeve 5 is a stepped hole, the middle section of the stepped hole is a smooth small-diameter section 22, the two ends of the stepped hole are large-diameter sections, a second sealing ring 15 is arranged in the large-diameter section at the front end of the stepped hole, an internal thread 21 is arranged in the large-diameter section at the rear end of the stepped hole, the adjusting valve core 4 is a stepped shaft, the small-diameter section at the front section of the stepped shaft is a smooth section 23, the smooth section 23 forms a seal with the transition coupling sleeve 5 through the second sealing ring 15, and the large-diameter section at the rear section is matched with the internal thread 21 of the transition coupling sleeve 5 through a thread to adjust a flow passage gap. The front end of the adjusting valve core 4 is in a conical structure, the small end of the front end can extend into the orifice 13, the diameter of the large end of the front end is larger than the aperture of the orifice 13, the end part of the adjusting valve core 4, which is positioned outside the valve block 1, is provided with a structure 19 for applying torque, the structure 19 for applying torque in the embodiment is in a hexagonal shape, the structure 19 for applying torque of the adjusting valve core 4 is screwed to adjust the overflowing gap between the front end and the orifice 13, the overflowing gap of the adjusting valve core 4 is locked by a locking nut 6, one end of the transition connecting sleeve 5, which extends out of the valve block 1, is provided with a polygonal limiting boss 5-1, and the limiting boss 5-1 is in a hexagonal shape in the embodiment. A threaded hole is arranged on the valve block 1 close to the transition connecting sleeve 5, a screw 7 is in threaded fit in the threaded hole, an anti-rotation limiting block 8 is fixedly installed through the screw 7 and corresponds to the limiting boss 5-1, a gasket is further arranged between the screw 7 and the anti-rotation limiting block 8, the head of the screw 7 presses the gasket on the anti-rotation limiting block 8, at least two limiting straight edges are arranged on different positions of the periphery of the anti-rotation limiting block 8, wherein the distance from the first limiting straight edge 8-1 to the axis of the screw 7 is larger than the distance from the second limiting straight edge 8-2 to the axis of the screw 7, the limiting straight edges at different positions can form anti-rotation limiting by selecting one limiting straight edge of the anti-rotation limiting block 8 to abut against the edge of the limiting boss 5-1 according to the rotation angle of the polygonal limiting boss 5-1 after the transition connecting sleeve 5 is installed and fixed, the transitional coupling sleeve 5 is prevented from rotating and loosening, when the edge of the limiting boss 5-1 is perpendicular to the central connecting line of the screw 7 and the adjusting valve core 4, the first limiting straight edge 8-1 is selected to abut against the edge of the limiting boss 5-1 to form anti-rotation limiting, and when the edge of the limiting boss 5-1 is obliquely crossed with the central connecting line of the screw 7 and the adjusting valve core 4, the second limiting straight edge 8-2 is selected to abut against the edge of the limiting boss 5-1 to form anti-rotation limiting. The periphery of the anti-rotation limiting block 8 can also be provided with a third limiting straight edge 8-3, the distance from the third limiting straight edge 8-3 to the axis of the screw 7 is smaller than the distance from the second limiting straight edge 8-2 to the axis of the screw 7, and when the transitional coupling sleeve 5 is installed in place and the angle of the polygonal limiting boss 5-1 is located on the central connecting line of the screw 7 and the adjusting valve core 4, the third limiting straight edge 8-3 of the anti-rotation limiting block 8 is used for abutting against the edge of the limiting boss 5-1 to form anti-rotation limiting. In this embodiment, the outer periphery of the anti-rotation limiting block 8 is a circle having two or three flat edges, i.e. two or three straight edges for limiting. An overflow valve 9 is mounted on the valve block 1, a second oil duct 10 is arranged in the valve block 1, the upstream end of the second oil duct 10 is communicated with the overflow valve 9, the downstream end of the second oil duct 10 is communicated with a third oil duct 11, and pressure oil in the second oil duct 10 is converged with pressure oil flowing out of a throttling hole 13 in an overflow cavity 12 and then flows into the third oil duct 11. A pipe joint 16 is fixedly connected to the downstream end of the third oil passage 11 of the valve block 1 and is used for connecting an output pipeline 17.

Such throttling arrangement, install a built-in throttling arrangement 3 on the valve block 1, thereby the trouble of external steel pipe has been saved, not only reduced occupation space, still reduced the cost, and, the adjusting valve core 4 is locked by lock nut 6, transition coupling sleeve 5 is spacing by preventing changeing stopper 8, the transition coupling sleeve 5 that arouses when having prevented the adjusting valve core 4 is not hard up, and the not hard up of transition coupling sleeve 5 in the use, still prevented that personnel from touching the handle by mistake and changing the problem of throttle effect, make the throttling arrangement's of this kind of throttling arrangement stable, the switching-over control oil flow of output is stable, the switching-over performance of having guaranteed the liquid accuse switching-over valve and the steady of compression cylinder work.

In this embodiment, after the transition coupling sleeve 5 is installed on the valve block 1, one straight edge of the rotation-preventing limiting block 8 is selected to limit the limiting boss 5-1 according to the difference of the outer hexagonal positions of the limiting boss 5-1, the structure 19 for applying torsion of the adjusting valve core 4 is screwed, and the flow passage gap between the front end of the adjusting valve core 4 and the orifice 13 is adjusted to a proper size. When the hydraulic control reversing valve works, the pressure oil in the first oil passage 2 flows into the throttle hole 13 and then passes through the overflowing gap between the front end of the regulating valve core 4 and the throttle hole 13 to complete throttling, meanwhile, the oil in the overflow valve 9 flows into the overflowing cavity 12 from the second oil passage 10, is merged with the pressure oil flowing out of the throttle hole 13, then flows into the third oil passage 11, and finally forms reversing control oil which is conveyed to the hydraulic control reversing valve through the output pipeline 17.

Claims (8)

1. The utility model provides a switching-over control oil throttle structure of hydraulic natural gas compressor liquid accuse switching-over valve, includes valve block (1) of liquid accuse switching-over valve, be equipped with first oil duct (2) that provide pressure oil in valve block (1), its characterized in that: the oil-saving valve is characterized in that a third oil duct (11) for outputting control oil is arranged in the valve block (1), the third oil duct (11) is communicated with the first oil duct (2) through a throttling hole (13) arranged in the valve block (1), a built-in throttling device (3) is arranged in the valve block (1) and corresponds to the throttling hole (13), the built-in throttling device (3) comprises a regulating valve core (4) and a transition connecting sleeve (5), the transition connecting sleeve (5) is in threaded connection and sealing with a mounting hole (18) in the valve block (1) through external threads, a flow passing cavity (12) for communicating the third oil duct (11) with the throttling hole (13) is reserved in the mounting hole (18), the regulating valve core (4) is matched and sealed with internal threads in the transition connecting sleeve (5) through threads, the front end of the regulating valve core (4) is of a conical structure, and the small end of the front end can extend into the throttling hole (13), the diameter of the large end of the front end is larger than the aperture of the throttling hole (13), the overflowing gap between the front end and the throttling hole (13) can be adjusted by screwing the adjusting valve core (4), the overflowing gap of the adjusting valve core (4) is locked by a locking nut (6), one end, extending out of the valve block (1), of the transition connecting sleeve (5) is provided with a polygonal limiting boss (5-1), a position, close to the transition connecting sleeve (5), on the valve block (1) is fixedly provided with an anti-rotation limiting block (8) through a screw (7) and corresponds to the limiting boss (5-1), different positions of the periphery of the anti-rotation limiting block (8) are provided with at least two limiting straight edges, wherein the distance from the first limiting straight edge (8-1) to the axis of the screw (7) is larger than the distance from the second limiting straight edge (8-2) to the axis of the screw (7), and the limiting straight edges at different positions can be provided with the polygonal limiting boss (5-1) after the transition sleeve (5) is fixedly arranged And (4) selecting a limiting straight edge of the anti-rotation limiting block (8) to abut against the edge of the limiting boss (5-1) to form anti-rotation limiting at the rotation angle of-1) so as to prevent the transition coupling sleeve (5) from rotating and loosening.

2. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: the oil-saving valve is characterized in that an overflow valve (9) is mounted on the valve block (1), a second oil duct (10) is arranged in the valve block (1), the upstream end of the second oil duct (10) is communicated with the overflow valve (9), and the downstream end of the second oil duct (10) is communicated with a third oil duct (11).

3. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 2, wherein: the downstream end of the second oil channel (10) is communicated with a flow passing cavity (12) in the valve block (1).

4. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: the periphery of the anti-rotation limiting block (8) is provided with a third limiting straight edge (8-3), and the distance from the third limiting straight edge (8-3) to the axis of the screw (7) is smaller than the distance from the second limiting straight edge (8-2) to the axis of the screw (7).

5. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: mounting hole (18) on valve piece (1) are the shoulder hole, and the hole bottom center of this shoulder hole is orifice (13), and the path section of shoulder hole is the internal thread section, and the path section is smooth section, transition hookup cover (5) anterior segment sets up external screw thread and mounting hole (18) path section screw-thread fit, is equipped with an annular groove (20) on the back end, sets up first sealing washer (14) in this annular groove (20), and first sealing washer (14) form sealedly with the smooth section contact of mounting hole (18).

6. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: the axle center hole of transition hookup cover (5) is the shoulder hole, and the middle section of this shoulder hole is glossy path section, and both ends are big footpath section, set up second sealing washer (15) in the big footpath section of shoulder hole front end, and the big footpath section of rear end sets up the internal thread, adjust case (4) and be the shoulder shaft, the path section of this shoulder shaft anterior segment is smooth section, and this smooth section forms sealedly through between second sealing washer (15) and the transition hookup cover (5), and the clearance that overflows is adjusted to the big footpath section of rear end and the interior screw thread fit of transition hookup cover (5).

7. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: the end part of the regulating valve core (4) positioned outside the valve block (1) is provided with a structure (19) for applying torsion.

8. The reversing control oil throttling structure of the hydraulic control reversing valve of the hydraulic natural gas compressor as claimed in claim 1, wherein: and the downstream end of the third oil channel (11) of the valve block (1) is fixedly connected with a pipe joint (16) for connecting an output pipeline (17).

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