CN207889950U

CN207889950U - A kind of attitude of ship regulating system

Info

Publication number: CN207889950U
Application number: CN201721354159.9U
Authority: CN
Inventors: 姚宏威
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-10-20
Filing date: 2017-10-20
Publication date: 2018-09-21
Anticipated expiration: 2027-10-20

Abstract

The utility model discloses a kind of attitude of ship regulating system, which spits including at least four groups receives device, spits for four groups and receives device and be respectively arranged at the front and back position of hull both sides；Pump group, the pump group are set to the hull interior, are spat described in four groups and receive device and be connected respectively with the pump group by main line；The pump group be used for for realize difference spit receive device between fluid circulate power is provided.System configuration provided by the present application is simple, small to ship space and production cost occupation proportion；Capital equipment is both mounted inside ship, is extended to only spitting outside hull and is received the orifice part of device, has little influence on the normal/cruise of ship；System is reliable and stable, and maintainability is good with safety.

Description

A kind of attitude of ship regulating system

Technical field

The utility model is related to ship equipment technical fields, more particularly to a kind of attitude of ship regulating system.

Background technology

Ship is a kind of transport facility navigated by water in rivers,lakes and seas.As the traffic fortune of traveling in liquid medium Defeated tool, traveling are influenced by water flow medium, they drive, move ahead retreat, the realization of turning etc. function, with land Transporting equipment is different, such as all kinds of large ship entering and leaving ports, it is often necessary to which the equipment such as towboat assist to adjust attitude of ship, very tired It is difficult.

Utility model content

The utility model provides a kind of attitude regulation system applied to power vessels such as various civilian ships, warships, It is mounted on ship more particularly to a set of, the pressure pipeline system that can be automatically controlled, it is with the fluid of environment where ship Medium is working media, by the adjusting of this set pressure pipeline system, is capable of the operation of the equipment such as independent or cooperation rudder for ship, real Attitude regulations and the posture balancing functions such as turning, steering, the translation of existing all kinds of power vessels.

The utility model provides following scheme：

A kind of attitude of ship regulating system, including：

It spits at least four groups and receives device, spit for four groups and receive device and be respectively arranged at the front and back position of hull both sides；

Pump group, the pump group are set to the hull interior, spat described in four groups receive device respectively by main line with it is described Pump group is connected；The pump group be used for for realize difference spit receive device between fluid circulate power is provided；

Wherein, described spit receives device including having mutually isostructural first orifice part, the second orifice part and third aperture Portion；The respective one end open and respectively open one end both passes through institute of first orifice part, the second orifice part and third orifice part It states hull ship side to extend to outside the hull, the other end is connected by looped pipeline road with the main line respectively；First hole Oral area opens one end and is arranged with the hull longitudinal axis orthogonal, and second orifice part opens one end towards the hull aft It one end and forms an angle setting with the hull longitudinal axis, the third orifice part opens one end towards the hull bow It one end and forms an angle setting with the hull longitudinal axis.

Preferably：It is both provided with safe grid inside one orifice part, the second orifice part and third orifice part.

Preferably：The safe grid is the rotatable blades of one group of weighting.

Preferably：The rotatable blades are also associated with the first drive component, and first drive component is for driving institute State rotating vane rotation.

Preferably：It spits to receive described in every group and is both provided with function valve group on the respective main pipeline of device, first orifice part, Second orifice part and the respective looped pipeline road of third orifice part are both provided with independent function valve group and safe valve group.

Preferably：The function valve group includes valve body and the second drive component, and the valve body is lower resistance Any one in valve, the lower resistance valve includes gate valve, butterfly valve；The power mode of second drive component is electricity Move, surge, it is pneumatic in any one.

Preferably：The pump group includes third drive component, and the third drive component is the vessel engines or electricity Motivation.

Preferably：The pump group includes at least one pump housing, and the general power of the pump group is mating according to pressure flow demand Setting.

Preferably：The pump housing is connected with the attached valve group of pump group；The attached valve group of the pump housing include check-valves, filter, Distributing valve, pressure flow instrument.

Preferably：The pump group is air compressor unit.

According to specific embodiment provided by the utility model, the utility model discloses following technique effects：

By the utility model, a kind of attitude of ship regulating system may be implemented, in an implementation mode, which can It spits to include at least four groups and receives device, spit for four groups and receive device and be respectively arranged at the front and back position of hull both sides；Pump group, the pump Group is set to the hull interior, is spat described in four groups and receives device and be connected respectively with the pump group by main line；The pump group is used In for realize difference spit receive device between fluid circulation power is provided；Wherein, described spit receives device including with mutually isostructural First orifice part, the second orifice part and third orifice part；First orifice part, the second orifice part and third orifice part are each From one end open and respectively open one end both passes through the hull ship side and extends to outside the hull, and the other end passes through pair respectively Pipeline is connected with the main line；First orifice part opens one end and the hull longitudinal axis orthogonal and is arranged, and described the Two orifice parts open one end towards described hull aft one end and form an angle setting with the hull longitudinal axis, and described Three orifice parts open one end towards hull bow one end and form an angle setting with the hull longitudinal axis.The application The system configuration of offer is simple, small to ship space and production cost occupation proportion；Capital equipment is both mounted inside ship, It extends to only spitting outside hull and receives the orifice part of device, have little influence on the normal/cruise of ship；System is reliable and stable, dimension Repairing property is good with safety.But since the transmission efficiency of pump apparatus is not high, general recommendations the utility model only does attitude of ship Adjustment, balance, auxiliary power and failure answer reciprocity function to use, it is not recommended that are used as ship's navigation and mainly drive power.

Certainly, any product for implementing the utility model does not necessarily require achieving all the advantages described above at the same time.

Description of the drawings

In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment Needed in attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only the utility model Some embodiments for those of ordinary skill in the art without creative efforts, can also be according to this A little attached drawings obtain other attached drawings.

Fig. 1 is a kind of structural schematic diagram for attitude of ship regulating system that the utility model embodiment provides；

Fig. 2 is that spitting of providing of the utility model embodiment receives the structural schematic diagram of device；

Fig. 3 is the faces the N-N sectional view that the utility model embodiment provides.

In figure：It spits and receives device 1, the first orifice part 101, the second orifice part 102, third orifice part 103, pump group 2, guard grating Lattice 3, the first drive component 301, function valve group 41-49, safe valve group 5, the attached valve group 6 of pump group, ship side 7, hull 8,.

Specific implementation mode

The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole Embodiment.Based on the embodiments of the present invention, the every other embodiment that those of ordinary skill in the art are obtained all belongs to In the range of the utility model protection.

Embodiment

It is a kind of attitude of ship regulating system that the utility model embodiment provides, such as Fig. 1 institutes referring to Fig. 1, Fig. 2, Fig. 3 Show, which spits including at least four groups receives device 1, spits for four groups and receives device and be respectively arranged at the front and back position of hull both sides；

Pump group 2, the pump group are set to the hull interior, are spat described in four groups and receive device 1 respectively by main line and institute Pump group 2 is stated to be connected；The pump group 2 be used for for realize difference spit receive device between fluid circulate power is provided；

Wherein, described to spit that receive device 1 include with mutually isostructural first orifice part 101, the second orifice part 102 and the Three orifice parts 103；First orifice part 101, the second orifice part 102 and 103 respective one end open of third orifice part and each From open one end 8 ship side 7 of the hull is both passed through to extend to outside the hull 8, the other end respectively by looped pipeline road with it is described Main line is connected；First orifice part 101 opens one end and is arranged with 8 longitudinal axis orthogonal of the hull, second aperture Portion 102 opens one end and forms an angle towards 8 stern one end of the hull and with the hull longitudinal axis setting, the third Orifice part 103 opens one end and forms an angle towards 8 bow one end of the hull and with the hull longitudinal axis setting.

Further, as shown in Figure 2 and Figure 3, an orifice part 101, the second orifice part 102 and third orifice part 103 Inside is both provided with safe grid 3.The safe grid 3 is the rotatable blades of one group of weighting.The rotatable blades also connect It is connected to the first drive component 301, first drive component 301 is for driving the rotating vane to rotate.Tu Na described in every group Be both provided with function valve group 41-48 on 1 respective main pipeline of device, first orifice part 101, the second orifice part 102 and 103 respective looped pipeline of third orifice part road is both provided with independent function valve group 49 and safe valve group 5.The function valve group Including valve body and the second drive component, the valve body is any one in lower resistance valve, the lower resistance Valve includes gate valve, butterfly valve；The power mode of second drive component is electronic, surge, it is pneumatic in any one.It is described Pump group 2 includes third drive component, and the third drive component is the vessel engines or motor.The pump group includes extremely Few pump housing, the general power of the pump group 2 is according to the mating setting of pressure flow demand.The pump housing is connected with pump group subsidiary valve Group 6；The attached valve group of the pump housing includes check-valves, filter, distributing valve, pressure flow instrument.The pump group 2 is compressed for air Unit.

Increase a set of pressure pipeline system on ship, while transformation appropriate is done to the structure of ship, opens up Tu Na dresses It sets.Imagine according to by working media of seawater, it is specific as follows：

Existing will be spat described in four receives device and is respectively labeled as A, B, C, D (as shown in Figure 1) for convenience of explanation.It spits and receives device 1 mainly opens up on the both sides ship shell of quarter position on the bow, spit receive device 1 open up must not influence hull structure it is strong Degree.It spits for every group and receives device 1：In the vertical direction, be positioned at different depth can automatic shutter 1-3 round mouths composition, it is ensured that The aperture of real work is always held under drauht line；It sees from horizontal direction, direction is shown in such as appended schematic diagram Different three row apertures, using the navigation direction of ship as axis, four groups spit receive device three row apertures direction it is different, every group is spat Device of receiving respectively at least one arranges aperture direction perpendicular to axis, and a row aperture deflects forward to post deflection, a row aperture.Subtracting Lack under the premise of being had an impact to ship normal/cruise, actually aperture of this deflection, deflects backward and forward and be the bigger the better.It is real In the design of border, by side spit receive device A and spitting receive device C, for, in order to reinforce spraying pressure water there is forward thrust backward to divide Amount, spit receive device A to post deflection that row aperture, actually directly open up on the quarter, direction is backward；Spit receive device C to That row aperture of preceding deflection is directly opened in first side of a ship transition position, and direction is forward.Centre one arranges aperture perpendicular to ship axis.Tu Na It to the aperture of post deflection is then ship side inner wall to be done L-shaped that device A, which deflects forward aperture and spitting and receives device C, is opened in its short side Apertured mouth, formation, which is spat, to be received forward thrust components of device A and spitting and receives the thrust components of device C backward, and being seen on the outside of ship is Chamfer the inclined hole that hull exterior wall opens up.In fact, in engineering practice, can by reinforce spitting receive device A to post deflection The thrust effect for deflecting aperture forward of device C is received in aperture and spitting, and is spat so as to equivalent substitution and receives the deflection hole forward of device A Mouthful and spit receive device C to post deflection aperture.

It spits and receives 1 structure of device and ship size and morphologic correlation, be generally set as circle or with the rectangular of fillet, in Portion is equipped with safety grids, prevents the big-sized solid matters such as small fish from sucking.It spits and receives each aperture of device, pipeline can be passed through It draws and is specially opened up outside ship side shell, it is contemplated that ship normal/cruise resistance generally directly opens up the i.e. ship of wall on the quarter On shell.It spits and receives each aperture of device, especially in high speed and large ship, it should the ability with self masking, to reduce During ship normal/cruise, the local turbulence in aperture.

Spit receive device 1 belong to conventional mechanical structure, structure type is varied.Fig. 2, which shows to spit, receives one kind of device 1 The structural principle of embodiment is spat and receives the basic principle of device setting and be, it should have thrust forward, perpendicular to course and backward Component.It spits and receives device aperture and be opened on 7 wall of ship side, aperture, should be abundant in actual design in the inside connecting pipe of ship In view of the bonding strength and sealing of pipeline and hull, aperture is internally provided with safety grids 3, and the safety grids 3 of this programme are same When have the function of shield (it is noted that safety grids with shield can set up separately).This safety grids 3 it is basic Structure is the rotatable blades of one group of weighting, and in the state of no work, blade is in vertical under the effect of gravity in the aperture State covers aperture；When aperture is in running order, due to the power of pump group 2, safety grids 3 are by positive pressure expulsion Or inhaled and move by negative pressure, horizontality is rotated to, simple safety grids 3 are become.For the ship or reality of small-sized low speed Experiment device, 3 basic structure of safety grids are equipped with appropriate damping, so that it may to meet the requirements；Applied to spitting for high speed and large ship Receive device, safety grids 3 can be in the mating special driving mechanism 301 in its shaft end, it is ensured that 3 state of safety grids it is reliable and stable Property.In figure, spit and receive device aperture safety grids driving mechanism 301, its mechanism principle is shown using double dot dash line) it is by hydraulic cylinder The parallel linkage embodiment of driving, it is practical according to ship's condition and design, part it is small-sized It is not necessary to mating hydraulic station Ship, driving can also be changed to motor-driven mechanical driving mechanism, such as the transmission mechanism of screw mechanism routine.

It spits and receives the safe valve group 5 of device, mainly provide a function that, repair or pipeline are broken in pipe-line system road Under the abnormal conditions such as bad leak, lock is disconnected to be spat and receives device, is isolated inside and outside ship.In practice, it is one group that safe valve group 5, which does not limit, Actual valve, it is a kind of safeguard construction that can also make, such as when the pump valve system installation site of pipeline is higher by water line, This mounting means just has the partial function of safety valve.

Point aperture control function valve group 49, is one group of valve group based on automatically controlling, and each hole of device is received for controlling to spit The on off state of mouth (1), realizes that the working condition in the aperture that each row respectively arranges can independent control.

Direction controlling function valve group 41-48 is one group of valve group based on automatically controlling, can be as needed, according to behaviour It controls instruction unpack and closes, respectively spit to changing A, B, C, D and receive the suction water state of device, realize different regulatory functions.With It spits and receives device A and for spitting and receiving device D：

The valve 44,45 of direction controlling function valve group is opened, and other valves of direction controlling function valve group are closed, then are realized It spits and receives device A water suction, spit and receive device D drainings；

The valve 41,47 of direction controlling function valve group is opened, and other valves of direction controlling function valve group are closed, then are realized It spits and receives device D water suction, spit and receive device A drainings；

The valve 41,44,42,46 of direction controlling function valve group opens simultaneously, other valves of direction controlling function valve group It closes, then realizes to spit and receive device A, D water suction, spit and receive device B, C draining；

Other spit receive device suction state and direction controlling function valve group valve on off state correspondence, with this Analogize.And spit and receive the different morphogenetic thrust effects of suction shape of device, the posture of final real above-mentioned spot oceangoing ship Adjustment.

Each valve of safe valve group 5 and function valve group 41-49 should generally have and automatically control and two kinds of manual operation Manner of execution, 41-49 is based on automatically controlling for function valve group, and valve only occurs event according to the instruction auto-action of console It is just operated and is overhauled by manual site when barrier.The type selecting of valve can generally select industry common according to the complementary conditions of ship It is electronic, surge or operated pneumatic valve, valve body is preferred valve with the lower resistances valve such as gate valve, butterfly valve.

Pump group 2 and its attached valve 6, engine of the power from ship of pump, can be driven by generation power, also may be used To take other coupled modes to be directly driven by engine.Pump group 2 can be the combination of single pump or more pumps, to ensure to pump The flow or lift of group arrive design value, and the attached valve of pump group 6 is the customary secondary configuration of pump, including check-valves, filter, divide Necessary subsidiary component etc. with the routine such as valve, pressure flow instrument, for realizing pump operation and the various combination sides of pump group Formula is run.The specifications parameter respectively pumped in pump group 2 is chosen according to the size of ship, but its basic characteristics is that flow is bigger, lift Height, general general power are not higher than the 30% of engine of boat and ship power.

As embodiment, this programme should be mentioned that pump group 2, be using liquid medium as power carrier.For equipment of small motor Ship and temporary needs reinforce the situation that attitude of ship is adjusted, and air dielectric can also be actually used, then pump group 2 also may be used To change into air compressor unit, its advantage is that pipeline arrangement is simple, the recoil strength that disadvantage is to provide is small, and noise is big.For one As ship, liquid medium is preferentially used, so this programme emphasis carries out narration explanation with pump group 2 for the pipe-line system of power. Pump group 2 is this set system core power part, by the work of pump group 2, transmits kinetic energy to flow so that flow has enough Pressure generates adjustment effect with environment flow phase separation to the posture of ship.

This set attitude regulation system that scheme provided by the present application is recorded, can effectively improve ship itself attitude regulation Ability fully overcomes the drawbacks described above of ship in the process of running, and has expanded some other performances.Make the autonomous of ship Controlling, flexibility and safety are further enhanced.According to the design feature of ship, the hull before and after this kind of power vessels Port and starboard wall stress balance position nearby (then must be arranged at water line lower part when using liquid as working media), respectively open up at least One group of aperture.This is the side of a ship wall opening specially designed, the mating necessary safety grids in aperture and shield, and equipment safety is received with spitting Valve valve group, a point aperture control function valve group, which are configured to spit together, receives device (A, B, C, D in Fig. 1).They can be according to practical need It wants, becomes suction inlet or outlet is handled up seawater.Using the navigation direction of ship as axis, spit receive each aperture of device direction not Together, in figure four groups spit and receive device, every group respectively at least one row aperture direction is perpendicular to axis, and a row aperture is to post deflection, one Row aperture deflects forward, and deflection angle is the bigger the better forward backward.It is aboard ship designed with a set of pump valve pressure pipeline system simultaneously, It is connected by pipeline and these apertures.By the conversion of the various functions valve switch state on pipeline, change each Tu Na The sucking of device/discharge state, so as to realize the adjustment of attitude of ship.

Attitude of ship regulating system provided by the present application as a result, at least may be implemented following pose adjustment, improves naval vessel Autonomous regulating power.It, which is spat, receives the mode of operation of device, and the correspondence with attitude of ship regulating effect is illustrated below：

Ship turning, the utility model can independently realize ship turning function：It spits and receives device A and spitting and receive device D water suctions, Local decompression is generated in seawater, is spat and is received device B and spitting and receive device C drainings, generates the thrust to seawater, form couple effect, it is real Spot oceangoing ship right turn；Equally, their water suction hull-borne is exchanged, realizes ship left steering.Enhancing ship narrow water turns around, and advises Keep away the regulating powers such as submerged reef；

Ship is turned, and the utility model coordinates with rudder for ship, can strengthen the turning function of ship：Underway ship, When rudder for ship action turning, four groups are spat that receive device basic operation the same, or only start two groups (state phase is received in such as C, D, spitting for they Instead) can also.Strengthen ship turning function, reduce turning radius, expand the scope of activities of ship so that ship can enter more Narrow waters；

The translation of ship, the utility model can independently realize that the transverse translation sexual stance of ship is adjusted：Spit receive device A and It spits and receives device C water suction, spit and receive device B and spitting and receive device D drainings, ship can be to left, on the contrary then to right translation.This work( Can, can be used for ship from go to dock and ship between it is close with detach, be conducive to ship supply etc. foreign exchanges ability；

The advance and retreat of ship balance, and the utility model can independently realize that ship retreats sexual stance and adjusts：It spits to receive and device A and spit The device B that receives absorbs water to the aperture of post deflection, spits and receives device C and spitting and receive the aperture draining that device D deflects forward, symmetrical adjust can be real It is opposite now to spit the state of receiving.These operations may be implemented ship and can slowly retreat (or advance) under Lentic environment, or certain Degree inner equilibrium rushes at the flow of stern (or bow), and position of the ship in flowing water is contributed to keep stopping with accurate；

The wind and wave resistance of ship balances, and the utility model can weaken to a certain extent and resist the outer sides such as stormy waves, undercurrent It to strength, adjusts spitting for side and receives device water suction, the spitting of opposite side receives device draining, realizes the lateral wind and wave resistance balance of ship. Direction is various and changeable the case where stormy waves, tidal bore, flow in actually navigating by water, and starts the utility model ship appearance in actual needs When state regulating system is coped with, ship can accordingly enable all, partly spit and receive device, the spare mouth of pump valve system can also be enabled E and F absorb water, and A, B, C, D tetra- spits and receive device completely or partially draining etc., can be conducive to the stabilization of ship's navigation；

Balance under ship abnormality, it is abnormal under accident condition in ship inclination, leak etc., it is spat by adjusting four Receive the suction state of device, such as (A, B, C, D) four spits and receive the side that device completely or partially drains or sinks to ship and arrange Water etc. can play the role of balance and maintain to a certain extent, and certainly, spare mouth E and F can also be turned by valve transfer It connects, for the draining in cabin.This multiple functions mode enables or switches, and accident can be delayed to deteriorate progress, as often as possible Win rescue time.

Various regulatory function integrated applications that are listed above and not enumerating, may be implemented the autonomous entering and leaving port of ship, ship Oceangoing ship is close safely to enter the various situations such as narrower waters, and reply flow, stormy waves with separate, ship so that ship Independence is stronger, and handling failure means are more more flexible, adaptation zone bigger.

System configuration provided by the present application is simple, small to ship space and production cost occupation proportion；Capital equipment is all It is placed in inside ship, extends to only spitting outside hull and receive the orifice part of device, have little influence on the normal/cruise of ship； System is reliable and stable, and maintainability is good with safety.But since the transmission efficiency of pump apparatus is not high, this practicality of general recommendations is new Type only does attitude of ship adjustment, balance, auxiliary power and failure and reciprocity function is answered to use, it is not recommended that is used as ship's navigation and mainly drives Dynamic power.

It should be noted that herein, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also include other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.

The above is only the preferred embodiment of the utility model only, is not intended to limit the protection model of the utility model It encloses.Any modification, equivalent substitution, improvement and etc. made within the spirit and principle of the present invention, are all contained in this reality With in novel protection domain.

Claims

1. a kind of attitude of ship regulating system, which is characterized in that including：

Pump group, the pump group are set to the hull interior, are spat described in four groups and receive device respectively by main line and the pump group It is connected；The pump group be used for for realize difference spit receive device between fluid circulate power is provided；

Wherein, described spit receives device including having mutually isostructural first orifice part, the second orifice part and third orifice part；Institute State the first orifice part, the second orifice part and third orifice part respectively one end open and respectively open one end both passes through the hull Ship side extends to outside the hull, and the other end is connected by looped pipeline road with the main line respectively；First orifice part is opened One end and the hull longitudinal axis orthogonal is put to be arranged, second orifice part open one end towards described hull aft one end and Form an angle setting with the hull longitudinal axis, the third orifice part open one end towards hull bow one end and It forms an angle setting with the hull longitudinal axis；

It spits to receive described in every group and is both provided with function valve group, first orifice part, the second orifice part on the respective main pipeline of device And the respective looped pipeline road of third orifice part is both provided with independent function valve group and safe valve group.

2. system according to claim 1, which is characterized in that an orifice part, the second orifice part and third aperture Safe grid is both provided with inside portion.

3. system according to claim 2, which is characterized in that the safe grid is the rotatable blades of one group of weighting.

4. system according to claim 3, which is characterized in that the rotatable blades are also associated with the first drive component, First drive component is for driving the rotating vane to rotate.

5. system according to claim 1, which is characterized in that the function valve group includes valve body and the second driving Component, the valve body are any one in lower resistance valve, and the lower resistance valve includes gate valve, butterfly valve；Described The power mode of two drive components is electronic, surge, it is pneumatic in any one.

6. system according to claim 1, which is characterized in that the pump group includes third drive component, and the third is driven Dynamic component is the vessel engines or motor.

7. system according to claim 6, which is characterized in that the pump group includes at least one pump housing, the pump group General power is according to the mating setting of pressure flow demand.

8. system according to claim 7, which is characterized in that the pump housing is connected with the attached valve group of pump group；The pump housing Attached valve group includes check-valves, filter, distributing valve, pressure flow instrument.

9. system according to claim 1, which is characterized in that the pump group is air compressor unit.