CN205663933U - Large compressor instrument control air supply automatic switching control equipment - Google Patents

Abstract

The utility model relates to a large compressor instrument control air supply automatic switching control equipment, including mount pad and two check valves. The mount pad includes two check valve mounting holes, mount pad export and mount pad inside passage. Two check valve mounting holes pass through mount pad inside passage and all communicate with the mount pad export, the exit end of two check valves passes through that check valve mounting hole syntropy is parallelly connected installs on the mount pad, and the export of two check valves is passed through mount pad inside passage and all is exported with the mount pad and communicate. Two check valves pass through threaded connection with the check valve mounting hole. Be equipped with O type sealing washer between the export of check valve and the check valve mounting hole. After adopting such structure, need not not manual operation, do not need control circuit, utilize the local delivery pressure, the pressure differential of outside air supply pressure, the two sets of check valves of automatic control. Have that simple structure, reliable operation, manufacturing and running cost are low, simple to operate, advantage that adaptability is good.

Description

A kind of large-scale compressor instrument controls automatic gas source switching device

Technical field

This utility model relates to compressor field, particularly relates to a kind of large-scale compressor instrument and controls source of the gas automatic switchover dress Put.

Background technology

Large-scale compressor generally controls source of the gas with low-pressure compressed air as instrument, controls the unlatching of air valve at different levels and closes Close.After compressor just starts, in certain time, the air pressure of the machine is not yet set up, and needs the help of external air source, closes air-breathing Valve, makes compressor light-load starting, after the machine air pressure is set up, translated into native gas source feed.External meters source of the gas generally by One Miniature low voltage air compressor (0.7MPa) or provided by other low-pressure gas source.

The traditional approach of source of the gas conversion is to install manual switching valve, by manual operation, or installs electromagnetic valve, automatically switches. Manual switching valve arrangement is simple, but needs manual operation, is susceptible to human operational error；Electromagnetic valve automatically switches, and cost is relatively Height, and need external control circuit, system is more complicated, when electromagnetic valve or control circuit lost efficacy, can cause operation troubles.

Based on above-mentioned situation, a kind of simple in construction of research and development, low cost, it is not necessary to manual operation, without control circuit The high compressor instrument of reliability controls automatic gas source switching device and is particularly important.

Summary of the invention

The technical problems to be solved in the utility model is that a kind of large-scale compressor instrument of design controls source of the gas automatic switchover dress Put, solve the high technology with fault rate of electromagnetic valve cost of switching valve maloperation and the automatic switchover manually of prior art Problem.

For solving above-mentioned technical problem, a kind of large-scale compressor instrument of the present utility model controls automatic gas source switching device Including mounting seat and two check-valves, two check valve structures are identical；Described mounting seat includes two check-valves installing holes, installations Seat outlet and mounting seat inner passage, said two check-valves installing hole is by mounting seat inner passage all with mounting seat outlet even Logical；The port of export of said two check-valves is installed in parallel in mounting seat in the same direction by check-valves installing hole, two check-valves Unidirectional outlet by mounting seat inner passage all with mounting seat outlet.

Further, the outlet of said two check-valves is threaded connection with the check-valves installing hole of mounting seat.

Further, it is provided with O RunddichtringO between outlet and the check-valves installing hole of mounting seat of described check-valves.

Further, described check-valves includes valve body, spring, non-return valve core, bowl ring and air inlet seat, described valve body Upper end is installed with air inlet seat and is connected；Described air inlet seat is hollow structure；Described non-return valve core in the endoporus of valve body, non-return valve core Upper end dish type cylindrical and valve body inner bore be provided with through-flow annular gap, the edge of non-return valve core top dish type cylindrical is R shape, non-return The lower section cervical region of spool dish type cylindrical is provided with triangle annular groove, is provided with in multiple through flow hole and spool on the lower conical surface of triangle annular groove Chamber communicates；Non-return valve core hollow cavity lower end be stepped hole in order to install spring, stepped hole all connects with multiple through-flow apertures；Institute Stating spring upper end to prop up at the ring-shaped step of non-return valve core endoporus, lower end props up bottom the ring-shaped step of valve body inner bore.Check-valves The stepped hole of core hollow cavity lower end is for spring radially location, and its top is provided with the blind hole that diameter is less, the most fixed with spring Hole, position is coaxial, and blind hole communicates with multiple apertures on the conical surface under triangle annular groove, the shoulder formed between holes and spring upper end Face contacts, and spring upper end props up at the shoulder of non-return valve core endoporus, and lower end props up the base circle shoulder of valve body inner bore.

Further, being provided with adjusting washer (disk) between described valve body and air inlet seat, described adjusting washer (disk) is the thin pad of multiple red copper Circle, is used for regulating the axial location of air inlet seat lower end, and has sealing function concurrently.

Further, the lower end dish type cylindrical of described air inlet seat, described dish type cylindrical is arranged over closure gasket groove, in annular groove Suit bowl ring, bowl ring matches with the endoporus of valve body, and the R shape of the dish type cylindrical with non-return valve core upper surface Side edge is touched, and constitutes radial direction and axial soft seal.

Further, between the shoulder bottom the lower surface of described non-return valve core and valve body inner bore, cushion pad is installed.Only Return spool in the endoporus of valve body, can axially free movement, its axial operating range is the H(i.e. opened gap of spool), choosing Joining the thickness of cushion pad, scalable non-return valve core moves axially distance in the range of setting value H.H-number is crossed conference and is caused check-valves During core motion, Impact energy rises, and H-number is too small can affect ventilation flow rate.Pressure gas source is all had to deposit at two groups of one-way valve inlet , but when pressure has height, the source of the gas that wherein pressure is high flows into through air inlet seat endoporus, promotes the descending H of non-return valve core, forced draft Outside non-return valve core upper end, between garden and valve body inner bore, annular flow gap flows into the triangular ring cavity of non-return valve core upper end cervical region, Flow into non-return valve core inner chamber through one group of aperture, flow out from the endoporus of valve body；And another group check valve is low due to pressure at inlet, its The pressure in nonreturn valve core exit raises owing to adjacent check-valves have input higher pressed gas, then this non-return valve core is at bullet Move H under spring force and pressure differential dual function, close air inlet, make the gas of the lower pressure at gas source inlet can not stop from this Return valve to flow out.Another group check-valves entrance is the source of the gas of elevated pressures, and its non-return valve core is pushed open by high pressure draught, and spring is pressed Contracting, high pressure draught is flowed out by this check-valves, becomes instrument through decompression and controls gas, and gases at high pressure rely on pressure differential by inlet gas pressure Relatively low adjacent non-return valve core inverse closing.

Further, the hardware of described check-valves is all made of stainless steel.

Further, described valve body is threaded connection with air inlet seat, and valve body upper end is provided with female thread, outside air inlet seat lower end Circle is provided with external screw thread and is connected with valve body upper end female thread.

Further, described valve body lower end cylindrical is external screw thread, is used for installing connection.

Further, air inlet seat upper end is provided with internal thread hole, for connecting the pipe joint of source of the gas.

Large-scale compressor instrument of the present utility model controls automatic gas source switching device in use, and mounting seat outlet connects this The import of machine instrument air air relief valve, the import of two check-valves connects external meters source of the gas respectively and the machine buffering air accumulator goes out Mouthful.The compressor air inputted respectively from two check-valves entrances in principle, can push the spool of check-valves open, flow to the machine The entrance of instrument supply gas air relief valve, is formed after decompression and controls gas.But, owing to the machine bleed pressure is higher, (this example is 4.0MPa), and external gas source pressure low (usually 0.7MPa), large-scale compressor instrument air of the present utility model automatically switches The connection compound mode of two groups of check valves of device, only allows high-pressure air source to pass through, becomes instrument and control gas after decompression.Instrument The pressure generally value in 0.4～0.5MPa controlled.Air relief valve is the associated part of this device, with the function of this switching device without Closing, Gu Tuzhong does not marks, only explanatory note.

The operation principle of large-scale compressor instrument of the present utility model control automatic gas source switching device:

For convenience of statement, claim outer check-valves by the check-valves communicated with external air source, the non-return connected with the machine air accumulator Valve claims interior check-valves.When, after compressor start, when the pressure in air accumulator is less than external air source pressure, external air source flows through outer stopping Return valve to instrument supply gas air relief valve entrance, after decompression, become instrument control gas, rely on pressure differential inversely to be closed by interior check-valves simultaneously Closing, external gas source will not enter the machine air accumulator.When the pressure in air accumulator gradually rises, and during higher than external air source pressure, Its pressure differential forces outer check-valves inversely to be closed, and the compressed air in the machine air accumulator flow to air relief valve import through interior check-valves, After decompression, become instrument control gas.Due to the specified output pressure of the machine higher (4.0MPa), ensure that compressor is properly functioning Automatically switch to output pressure more than during external air source pressure.And outside condenser, it is in off-load holding state.When the machine gas storage When tank air pressure drops below external air source pressure, automatically switch into external air source supply instrument and control gas.

Large-scale compressor instrument air automatic switching control equipment of the present utility model, simple in construction, without manual operation, it is not required to Want control circuit, utilize the pressure differential of the machine output pressure and external air source pressure, automatically control two groups of check-valves, only allow relatively The source of the gas of high pressure, through check-valves, flow to the import of instrument supply gas air relief valve, becomes instrument and control gas after decompression, it is achieved outside instrument Table source of the gas and the automatic switchover of the machine source of the gas.There are simple in construction, reliable operation, manufacture and operating cost low, easy for installation, suitable The advantage that answering property is good.

Accompanying drawing explanation

Below in conjunction with the accompanying drawings detailed description of the invention of the present utility model is further elucidated with.

Fig. 1 is the functional symbol figure that large-scale compressor instrument of the present utility model controls automatic gas source switching device；

Fig. 2 is the structure chart that large-scale compressor instrument of the present utility model controls automatic gas source switching device；

Fig. 3 is the mounting seat structure chart that large-scale compressor instrument of the present utility model controls automatic gas source switching device；

Fig. 4 is the check valve structure figure that large-scale compressor instrument of the present utility model controls automatic gas source switching device.

Detailed description of the invention

In conjunction with Fig. 1, Fig. 2 and Fig. 3, the large-scale compressor instrument of this example controls automatic gas source switching device and includes mounting seat 1 and two check-valves 3, the structure of two check-valves 3 is identical, and described mounting seat 1 includes two check-valves installing hole 1-1, installations Seat outlet 1-2 and mounting seat inner passage 1-3, said two check-valves installing hole 1-1 by mounting seat inner passage 1-3 all with Mounting seat outlet 1-2 connection；The port of export of said two check-valves 3 is installed in parallel in peace in the same direction by check-valves installing hole 1-1 On dress seat 1, the unidirectional outlet of two check-valves 3 is all connected with mounting seat outlet 1-2 by mounting seat inner passage 1-3.This reality Executing in example, in Fig. 1, the entrance m of the check-valves 3 on the right connects external air source, and the entrance n of the check-valves 3 on the left side connects the machine gas storage Tank exports, and the unidirectional outlet of two groups of valves is turned on the entrance p of instrument supply gas air relief valve, becomes control gas after decompression.Two non-returns In valve 3, a source of the gas that permission air pressure is high becomes control gas by check-valves 3 after decompression, and another organizes low the stopping of bleed pressure Return the spool of valve 3, by anticyclonic pressure reduction inverse closing.The switching of source of the gas, is automatically obtained by pressure differential.

Further, said two check-valves 3 is threaded connection with check-valves installing hole 1-1.

Further, it is provided with O RunddichtringO 2 between outlet and the check-valves installing hole 1-1 of described check-valves 3.

In conjunction with Fig. 4, described check-valves 3 includes valve body 3-1, spring 3-2, non-return valve core 3-4, bowl ring 3-5 and enters Gas seat 3-6；Described valve body 3-1 upper end is installed with air inlet seat 3-6 and is connected, and valve body 3-1 upper end is provided with under screwed hole and air inlet seat 3-6 The external screw thread of end is installed and is connected；Described air inlet seat 3-6 is hollow structure, described non-return valve core 3-4 in the endoporus of valve body 3-1, The upper end plate-like cylindrical of non-return valve core 3-4 and valve body 3-1 endoporus are provided with through-flow annular gap, outside the dish type of non-return valve core 3-4 top The edge of circle is R shape, and the cervical region below non-return valve core 3-4 dish type cylindrical is provided with triangle annular groove, on the lower conical surface of triangle annular groove Be provided with multiple through flow hole to communicate with valve core cavity, non-return valve core 3-4 hollow cavity lower end be stepped hole in order to install spring 3-2, Stepped hole all connects with multiple through-flow apertures；Described spring 3-2 upper end props up at the ring-shaped step of non-return valve core 3-4 endoporus, under End props up bottom the ring-shaped step of valve body 3-1 endoporus.The stepped hole of non-return valve core 3-4 hollow cavity lower end is used for spring 3-2 footpath To location, its top is provided with the blind hole that diameter is less, coaxial with spring 3-2 radially hole, location, blind hole and the conical surface under triangle annular groove Upper multiple apertures communicate, and the shoulder formed between holes contacts with spring 3-2 upper surface, and spring 3-2 upper end props up non-return At the shoulder of spool 3-4 endoporus, lower end props up the base circle shoulder of valve body 3-1 endoporus.

Further, being provided with adjusting washer (disk) 3-7, described adjusting washer (disk) 3-7 between described valve body 3-1 and air inlet seat 3-6 is The thin packing ring of multiple red coppers, is used for regulating the axial location of air inlet seat 3-6 lower end, and has sealing function concurrently.

Further, the lower end of described air inlet seat 3-6 is provided with dish type cylindrical, and described dish type cylindrical is arranged over sealing ring Groove, suit bowl ring 3-5, matches with the endoporus of valve body 3-1 in annular groove, and with non-return valve core 3-4 upper surface dish type outside The R shape side edge of circle is touched, and constitutes radial direction and axial soft seal.The dish type cylindrical of air inlet seat 3-6 lower end and spool 3-4 upper end Dish type cylindrical similar, its edge is R shape, it is ensured that spool 3-4 close time, bowl ring 3-5 is had certain decrement (about 15%～20%), and keep spool 3-4 top directly to contact with inlet valve seat 3-6 lower surface, without by Bowl seal The inward flange of circle 3-5 is clipped in the middle.

Further, between the step bottom the lower surface of described non-return valve core 3-4 and valve body 3-1 endoporus, buffering is installed Pad 3-3.Non-return valve core 3-4 in the endoporus of valve body 3-1, the opened gap of the axial i.e. spool of operating range H, apolegamy cushion pad Thickness, scalable non-return valve core 3-4 moves axially distance in the range of setting value H.H-number is crossed conference and is caused non-return valve core 3-4 to transport Time dynamic, Impact energy rises, and H-number is too small can affect ventilation flow rate.At gas source inlet, compressed air is through air inlet seat 3-6 endoporus stream Entering, promote the descending H of non-return valve core 3-4, forced draft is annular logical between garden and valve body 3-1 endoporus outside non-return valve core 3-4 upper end Ebb interval flows into the triangular ring cavity of non-return valve core 3-4 upper end cervical region, flows into non-return valve core 3-4 inner chamber through one group of aperture, from valve The endoporus of body 3-1 flows out.No pressure gas input at gas source inlet, although or at gas source inlet, have pressure gas source, but press The pressure in power its exit relatively low raises owing to adjacent check-valves have input higher pressed gas, then non-return valve core 3-4 exists Under spring force and pressure differential dual function, upper shifting, closes air inlet, and the gas making the lower pressure at gas source inlet can not be from this Check-valves flows out.Another group check-valves entrance is the source of the gas of elevated pressures, and its non-return valve core is pushed open by high pressure draught, spring 3-2 Being compressed, high pressure draught is flowed out by this check-valves, becomes instrument through decompression and controls gas, and gases at high pressure rely on pressure differential by entrance The adjacent non-return valve core inverse closing that air pressure is relatively low.

Further, the hardware of described check-valves 3 is all made of stainless steel.

Further, described valve body 3-1 is threaded connection with air inlet seat 3-6, and valve body 3-1 upper end is provided with female thread, enters Gas seat 3-6 lower end cylindrical is provided with external screw thread and is connected with valve body 3-1 upper end female thread.

Further, described valve body 3-1 lower end cylindrical is external screw thread, is used for installing connection.

Further, air inlet seat 3-6 upper end is provided with internal thread hole, for connecting the pipe joint of source of the gas.

The large-scale compressor instrument of the present embodiment controls automatic gas source switching device in use, and mounting seat outlet 1-2 connects The import of local gauge source of the gas air relief valve, the import of two check-valves 3 connects external meters source of the gas and the machine buffering air accumulator respectively Outlet.The compressor air inputted respectively from two check-valves entrances in principle, can push the spool of check-valves open, flow to this The entrance of machine instrument supply gas air relief valve, is formed after decompression and controls gas.It practice, owing to the air pressure at two groups of one-way valve inlet has height Low, there is pressure differential, the connection compound mode of two groups of check valves determines and only allows high pressure draught to pass through check valve, after decompression Become instrument and control gas, and the nonreturn valve core of low-pressure gas source is isolated by the pressure reduction inverse closing of gases at high pressure.The pressure of instrument supply gas Generally value in 0.4～0.5MPa.Air relief valve is the associated part of this device, unrelated with the function of this switching device, Gu Tuzhong Do not mark, only explanatory note.

The operation principle of the large-scale compressor instrument control automatic gas source switching device of the present embodiment:

For convenience of statement, claim outer check-valves by the check-valves communicated with external air source, the check-valves connected with the machine storage tank Check-valves in claiming.When, after compressor start, when the pressure in air accumulator is less than external air source pressure, external air source flows through outer non-return Valve, to instrument supply gas air relief valve entrance, becomes instrument after decompression and controls gas, inversely cut out by interior check-valves simultaneously, and external gas source is not The machine air accumulator can be entered.When the pressure in air accumulator gradually rises, and during higher than external air source pressure, outside its pressure differential forces The spool of check-valves is inversely closed, and the compressed air in the machine air accumulator enters air relief valve import through interior check-valves, becomes after decompression Gas is controlled for instrument.Due to the specified output pressure of the machine higher (4.0MPa), it is ensured that compressor is properly functioning to output pressure Automatically switch more than during external air source pressure.And outside condenser, it is in off-load holding state.When the machine air accumulator air pressure declines To during less than external air source pressure, automatically switch into external air source supply instrument and control gas.

The large-scale compressor instrument air automatic switching control equipment of the present embodiment, simple in construction, without manual operation, it is not necessary to Control circuit, utilizes the pressure differential of the machine output pressure and external air source pressure, automatically controls two groups of check-valves switchings, only allows The source of the gas of elevated pressures, through check-valves, flow to the import of instrument supply gas air relief valve, becomes instrument and controls gas, it is achieved be outside after decompression Instrument air and the automatic switchover of the machine source of the gas.Have simple in construction, reliable operation, manufacture and operating cost low, easy for installation, The advantage that adaptability is good.

Elaborate a lot of detail in the above description so that fully understanding this utility model.But above description Being only preferred embodiment of the present utility model, this utility model can be to be much different from alternate manner described here Implementing, therefore this utility model is not limited by disclosed above being embodied as.The most any those skilled in the art exist Without departing under technical solutions of the utility model ambit, the method and the technology contents that all may utilize the disclosure above are new to this practicality Type technical scheme makes many possible variations and modification, or is revised as the Equivalent embodiments of equivalent variations.Every without departing from this The content of utility model technical scheme, such as the difference of check-valves 3 structure, the difference of the connected mode of import and export, uses different Material etc., according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, All still fall within the range of technical solutions of the utility model protection.

Claims (8)

1. a large-scale compressor instrument controls automatic gas source switching device, it is characterised in that: include mounting seat (1) and two stop Returning valve (3), described mounting seat (1) includes that two check-valves installing holes (1-1), mounting seat outlet (1-2) and mounting seat are internal logical Road (1-3)；Said two check-valves installing hole (1-1) is by mounting seat inner passage (1-3) all with mounting seat outlet (1-2) even Logical；The port of export of said two check-valves (3) is installed in parallel in mounting seat (1) in the same direction by check-valves installing hole (1-1), and two The unidirectional outlet of individual check-valves (3) is all connected with mounting seat outlet (1-2) by mounting seat inner passage (1-3).

Large-scale compressor instrument the most according to claim 1 controls automatic gas source switching device, it is characterised in that: described only Return and be provided with O RunddichtringO (2) between outlet and the check-valves installing hole (1-1) of valve (3).

Large-scale compressor instrument the most according to claim 1 and 2 controls automatic gas source switching device, it is characterised in that: institute State check-valves (3) to be threaded connection with check-valves installing hole (1-1).

Large-scale compressor instrument the most according to claim 1 and 2 controls automatic gas source switching device, it is characterised in that: institute State check-valves (3) and include valve body (3-1), spring (3-2), non-return valve core (3-4), bowl ring (3-5) and air inlet seat (3- 6)；Described valve body (3-1) upper end is installed with air inlet seat (3-6) and is connected, and described air inlet seat (3-6) is hollow structure, described non-return Spool (3-4) is in the endoporus of valve body (3-1), and the upper end dish type cylindrical of non-return valve core (3-4) is provided with logical with valve body (3-1) endoporus Stream annular gap, the edge of non-return valve core (3-4) top dish type cylindrical is R shape, the lower square neck of non-return valve core (3-4) dish type cylindrical Portion is provided with triangle annular groove, is provided with multiple through flow hole and communicates with valve core cavity on the lower conical surface of triangle annular groove, non-return valve core (3-4) Hollow cavity lower end be stepped hole in order to install spring (3-2), stepped hole all connects with multiple through-flow apertures；Described spring (3- 2) upper end props up at the ring-shaped step of non-return valve core (3-4) endoporus, and lower end props up bottom the ring-shaped step of valve body (3-1) endoporus.

Large-scale compressor instrument the most according to claim 4 controls automatic gas source switching device, it is characterised in that: described valve Being provided with adjusting washer (disk) (3-7) between body (3-1) and air inlet seat (3-6), described adjusting washer (disk) (3-7) is the thin packing ring of multiple red copper.

Large-scale compressor instrument the most according to claim 4 controls automatic gas source switching device, it is characterised in that enter described in: The lower end of gas seat (3-6) is provided with dish type cylindrical, and described dish type cylindrical is arranged over closure gasket groove, suit bowl ring in annular groove (3-5), match with the endoporus of valve body (3-1), and the R shape side edge of the dish type cylindrical with non-return valve core (3-4) upper surface Touch.

Large-scale compressor instrument the most according to claim 4 controls automatic gas source switching device, it is characterised in that: described only Return, between the shoulder bottom the lower surface of spool (3-4) and valve body (3-1) endoporus, cushion pad (3-3) is installed.

Large-scale compressor instrument the most according to claim 4 controls automatic gas source switching device, it is characterised in that: described valve Body (3-1) upper end is provided with female thread, and air inlet seat (3-6) lower end cylindrical is provided with external screw thread with valve body (3-1) upper end female thread even Connect.