CN117948524A - Flue gas monitoring equipment for fire supervision and use method thereof - Google Patents

Abstract

The invention discloses a smoke monitoring device for fire supervision and a use method thereof, comprising a fixed plate, wherein a controller is fixedly arranged at the bottom of the right side of the fixed plate, an alarm is fixedly arranged at the bottom of the left side of the fixed plate, grooves I are formed in the left side and the right side of the front surface of the fixed plate, and a sliding rod is longitudinally and fixedly connected with an inner cavity of each groove I. According to the invention, through the cooperation of the display screen, the smoke sensor, the slide bar, the alarm, the mounting groove, the sliding sleeve, the reserved groove, the through hole, the protective cover, the connecting plate, the torsion spring II, the clamping plate, the spring, the rotating rod, the small electric push rod, the limiting ring, the pull rope II, the mounting plate, the groove II, the sliding ring and the pull rope I, the problem that smoke at different heights cannot be detected due to the fact that the existing monitoring device does not have a height adjusting function is solved, meanwhile, the smoke cannot be detached and overhauled after being mounted, remote alarm cannot be carried out, and the problem that smoke cannot be perceived quickly is solved.

Description

Flue gas monitoring equipment for fire supervision and use method thereof

Technical Field

The invention relates to the technical field of fire supervision, in particular to smoke monitoring equipment for fire supervision and a use method thereof.

Background

The fire fighting is to eliminate hidden danger and prevent disaster (namely, prevent and solve the general term of human, natural and accidental disasters encountered by people in the processes of life, work and study), and the narrow meaning of the fire fighting is that at the beginning of people's understanding: the meaning of fire disaster (putting out) mainly includes personnel rescue in fire scene, rescue of important facility equipment, relics, security protection and rescue of important property, putting out fire disaster and the like, aims to reduce the damage degree caused by fire disaster, reduce casualties and property loss, is uniformly commanded by people air defense command parts at all levels in the war time, takes professional fire power as backbone, mobilizes the implementation of professional firefighting teams, volunteer teams and people in enterprises and towns, and the firefighting action mainly comprises: ① The method comprises the following steps of finding out fire conditions and damaged conditions, knowing the topography and wind direction of a fire scene, the structure and an entrance of a fire building, the conditions of trapped personnel and the like, carrying out on-site command ②, enabling organization strength to quickly reach the fire scene, selecting fire extinguishing agents and fire extinguishing equipment according to fire properties, correctly applying fire extinguishing tactics according to the fire scene conditions, carrying out fire blocking, blocking fire paths, extinguishing residual fire, watching the fire scene and the like, enabling ③ to quickly rescue the trapped personnel, transferring the injured personnel, carrying out evacuation, ④ timely evacuating or isolating dangerous articles nearby the fire scene, preventing secondary disasters, using water and chemical fire extinguishing agents for fire fighting, utilizing equipment such as fire trucks, fire extinguishers, motorized water pumps and the like to carry out fire extinguishing, adhering to the actions of the prior art, carrying out control and ensuring important action principles, dividing the common fire extinguishing stations into two types of common fire extinguishing stations and special service fire extinguishing stations, wherein the common fire extinguishing stations are divided into first-level common fire extinguishing stations and second-level common fire extinguishing stations, and city common fire extinguishing stations must be established; cities (including) above the level of land and county-level cities with developed economy should be provided with special service fire stations; the urban built-up area is internally provided with a first-level common fire station which is difficult to install, and a second-level common fire station can be provided through demonstration; the cities with task needs can be provided with professional fire stations such as water fire stations, aviation fire stations and the like, and the layout of the fire stations in the urban planning area is generally determined on the principle that a fire department can reach the edge of the responsibility area within 5 minutes after receiving a start command.

The in-process that carries out fire control monitoring often needs to detect the flue gas, and current monitoring devices does not have the function of altitude mixture control to can't detect the smog of co-altitude not, simultaneously, inconvenient dismantlement maintenance to it after the installation, and can't carry out remote alarm, can't perceive fast when making the smog appear.

Disclosure of Invention

The invention aims to provide smoke monitoring equipment for fire supervision and a use method thereof, which have the advantages of adjustable height, convenient maintenance and remote alarm, and solve the problems that the existing monitoring device does not have the function of height adjustment, so that smoke at different heights cannot be detected, and meanwhile, the smoke monitoring equipment is inconvenient to disassemble and maintain after installation and cannot carry out remote alarm, so that the smoke cannot be quickly perceived.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a fire control is flue gas monitoring facilities for supervision, includes the fixed plate, the bottom fixed mounting on fixed plate right side has the controller, the left bottom fixed mounting of fixed plate has the alarm, recess one has all been seted up on the left and right sides of fixed plate front surface, the inner chamber longitudinal fixedly connected with slide bar of recess one, the center department of fixed plate front surface has seted up the joint groove, the front side of fixed plate is provided with the installation component, the front side of installation component is provided with the monitoring component, the monitoring component includes the bottom plate, the top fixed mounting of bottom plate front surface has the display screen, the bottom fixed mounting of bottom plate front surface has smoke transducer, recess two has been seted up to the center department of fixed plate rear side, the top of fixed plate, the top of front surface and the inner wall of recess two all fixedly connected with slip ring, the inner chamber of slip ring runs through and is provided with stay cord one.

Preferably, the top and the bottom of the left side and the right side of the fixed plate are fixedly welded with mounting plates, and the front surface of each mounting plate is provided with mounting holes in a penetrating way.

Preferably, the installation component includes the lifter plate, the equal fixed welding in four corners of lifter plate back surface has the sliding sleeve, the surface of slide bar is located to the sliding sleeve, the equal fixed welding in four corners of lifter plate front surface has spacing angle, the mounting groove has been seted up to the center department of lifter plate front surface, the bottom fixedly connected with pulling force subassembly of mounting groove inner chamber.

Preferably, the pulling force subassembly includes small-size electric putter, small-size electric putter fixed mounting is in the bottom of mounting groove inner chamber, small-size electric putter's flexible end fixedly connected with stay cord two, the surface cover of stay cord two is equipped with the spacing ring, the rear side fixed connection of spacing ring is in the top of mounting groove inner chamber, the round hole has been seted up in the top of mounting groove inner chamber running through.

Preferably, the left and right sides of lifter plate front surface all fixed mounting has spacing subassembly, spacing subassembly includes the dead lever, the front side movable sleeve on dead lever surface is equipped with the limiting plate, the surface cover of dead lever is equipped with torsional spring one, the front end fixed connection of torsional spring one is in the rear side of limiting plate, the rear side fixed connection of torsional spring one is in the front side of lifter plate.

Preferably, the top of lifter plate front surface has the shield through pivot swing joint, the reservation groove has all been seted up to the left and right sides of shield, the through-hole has been seted up on the surface of shield, and the surface cover of pivot is equipped with torsional spring three, and torsional spring three's both ends respectively with lifter plate and shield fixed connection.

Preferably, the center department movable mounting of lifter plate front surface rear side has the joint subassembly, the joint subassembly includes the connecting plate, the quantity of connecting plate is two, and fixed welding has the bull stick between two connecting plates in the left and right sides of lifter plate rear side respectively, the equal movable sleeve in left and right sides on bull stick surface is equipped with torsional spring two.

Preferably, the two ends of the torsion spring II are respectively and fixedly connected with the connecting plate and the clamping plate, the bottom of the front side of the clamping plate is fixedly connected with a spring, and the front side of the spring is fixedly connected with the rear side of the lifting plate.

The application method of the smoke monitoring equipment for fire supervision comprises the following steps:

A: the fixing plate is fixed at a position to be installed through the installation plate, screws are penetrated into the installation plate to fix, the first pull rope is pulled downwards, so that the lifting plate moves upwards, the clamping plate is extruded by the clamping groove in the upward moving process of the lifting plate, so that the spring is compressed, meanwhile, the second torsion spring is twisted, when the lifting plate moves upwards to a proper position, the first pull rope is stopped to be pulled, the spring rebounds, the second torsion spring is reset, so that the clamping plate is reset, the lifting plate is fixed at the position to be required, and then surrounding smoke is detected through the smoke sensor;

B: when the smoke sensor detects smoke, the smoke sensor sends a signal to the controller, the controller sends the signal to the display screen for display, and meanwhile, the controller controls the alarm to give an alarm so as to achieve an alarm effect;

c: when the monitoring component needs to be taken down, the operation controller starts the small-sized electric push rod, the telescopic end is contracted, the second pull rope is driven to move downwards, the clamping plate is pulled forwards, at the moment, the lifting plate falls freely, when the lifting plate falls to the lowest position, the limiting plate is rotated, the torsion spring is twisted, the limiting plate is separated from the surface of the bottom plate, and then the limiting plate is taken out from the inside of the limiting angle, so that the lifting plate can be detached.

Compared with the prior art, the invention has the following beneficial effects:

1. According to the invention, through the cooperation of the display screen, the smoke sensor, the slide bar, the alarm, the mounting groove, the sliding sleeve, the reserved groove, the through hole, the protective cover, the connecting plate, the torsion spring II, the clamping plate, the spring, the rotating rod, the small electric push rod, the limiting ring, the pull rope II, the mounting plate, the groove II, the sliding ring and the pull rope I, the smoke detection device has the advantages of adjustable height, convenience in overhaul and capability of remotely alarming, and solves the problems that the existing monitoring device does not have the function of height adjustment, so that the smoke at different heights cannot be detected, meanwhile, the smoke detection device is inconvenient to disassemble and overhaul after being mounted, remote alarm cannot be performed, and the smoke cannot be quickly perceived when the smoke appears.

2. According to the invention, the fixing plate can be conveniently installed at a required position through the use of the first stay rope, the lifting plate can be conveniently pulled to move upwards, the lifting plate can be limited through the use of the sliding rod and the sliding sleeve, so that shaking in the process of moving up and down is avoided, the bottom plate can be conveniently limited through the use of the limiting angle, the bottom plate can be conveniently limited in the limiting angle through the use of the limiting assembly, the monitoring assembly can be protected from being damaged in the monitoring process through the use of the protecting cover, the external smoke can be conveniently monitored by the detecting assembly through the use of the through hole, and the lifting plate can be limited and prevented from falling through the use of the clamping assembly and the clamping groove.

Drawings

FIG. 1 is a perspective view of the structure of the present invention;

FIG. 2 is a perspective view of the mounting assembly of the present invention;

FIG. 3 is a perspective view of a spacing assembly of the present invention;

FIG. 4 is a bottom perspective view of the mounting assembly of the present invention;

FIG. 5 is a bottom perspective view of the present invention;

FIG. 6 is a rear perspective view of the present invention;

FIG. 7 is a bottom perspective view of the clamping assembly of the present invention;

FIG. 8 is a rear perspective view of the present invention;

FIG. 9 is a perspective view of the structure of the present invention;

Fig. 10 is an enlarged view of a of fig. 9 according to the present invention.

In the figure: 1 fixed plate, 2 controller, 3 monitoring module, 31 bottom plate, 32 display screen, 33 smoke sensor, 4 slide bar, 5 alarm, 6 recess one, 7 joint groove, 8 installation component, 81 lifter plate, 82 spacing subassembly, 821 dead lever, 822 limiting plate, 823 torsional spring one, 83 spacing angle, 84 mounting groove, 85 sliding sleeve, 86 reservation groove, 87 through-hole, 88 protective cover, 89 joint subassembly, 891 connecting plate, 892 torsional spring two, 893 cardboard, 894 spring, 895 bull stick, 810 pulling force subassembly, 8101 small-size electric putter, 8102 limiting ring, 8103 pulling rope two, 9 mounting plate, 10 recess two, 11 sliding ring, 12 pulling rope one.

Detailed Description

Referring to fig. 1-10, a smoke monitoring device for fire supervision comprises a fixed plate 1, wherein a controller 2 is fixedly installed at the bottom of the right side of the fixed plate 1, an alarm 5 is fixedly installed at the bottom of the left side of the fixed plate 1, a first groove 6 is formed in the left side and the right side of the front surface of the fixed plate 1, a sliding rod 4 is longitudinally and fixedly connected to the inner cavity of the first groove 6, a clamping groove 7 is formed in the center of the front surface of the fixed plate 1, a mounting assembly 8 is arranged on the front side of the fixed plate 1, a monitoring assembly 3 is arranged on the front side of the mounting assembly 8, the monitoring assembly 3 comprises a bottom plate 31, a display screen 32 is fixedly installed at the top of the front surface of the bottom plate 31, a smoke sensor 33 is fixedly installed at the bottom of the front surface of the bottom plate 31, and also called a smoke alarm or smoke alarm can detect smoke generated during fire, photoelectric smoke sensor devices are adopted in the inside, the smoke sensor 33 can be widely applied to places such as shops, hotels, stores, warehouses, machine rooms, houses and the like for fire safety detection, a smoke sensor 10 is arranged in the center of the front surface of the fixed plate 1, a strong sound can be emitted after an alarm, a groove 10 is formed in the center of the front side of the fixed plate 1, a sliding ring 11 is fixedly connected to the inner wall of the front surface of the first groove 11, and the front surface of the sliding ring 11 is fixedly arranged at the top of the front surface of the fixed plate 11;

The top and the bottom of the left side and the right side of the fixed plate 1 are fixedly welded with mounting plates 9, and the front surface of each mounting plate 9 is provided with a mounting hole in a penetrating way;

The mounting assembly 8 comprises a lifting plate 81, sliding sleeves 85 are fixedly welded at four corners of the back surface of the lifting plate 81, the sliding sleeves 85 are sleeved on the surface of the sliding rod 4 in a sliding manner, limit angles 83 are fixedly welded at four corners of the front surface of the lifting plate 81, a mounting groove 84 is formed in the center of the front surface of the lifting plate 81, and a tension assembly 810 is fixedly connected to the bottom of an inner cavity of the mounting groove 84;

the tension assembly 810 comprises a small electric push rod 8101, the small electric push rod 8101 is fixedly arranged at the bottom of the inner cavity of the mounting groove 84, a second stay wire 8103 is fixedly connected to the telescopic end of the small electric push rod 8101, a limiting ring 8102 is sleeved on the outer surface of the second stay wire 8103, the rear side of the limiting ring 8102 is fixedly connected to the top of the inner cavity of the mounting groove 84, a round hole is formed in the top of the inner cavity of the mounting groove 84 in a penetrating manner, and one end, far away from the small electric push rod 8101, of the second stay wire 8103 penetrates through the round hole and is fixedly connected with the front side of the clamping plate 893;

Limiting components 82 are fixedly mounted on the left side and the right side of the front surface of the lifting plate 81, each limiting component 82 comprises a fixed rod 821, a limiting plate 822 is movably sleeved on the front side of the surface of the fixed rod 821, a torsion spring I823 is sleeved on the surface of the fixed rod 821, the front end of the torsion spring I823 is fixedly connected to the rear side of the limiting plate 822, and the rear side of the torsion spring I823 is fixedly connected to the front side of the lifting plate 81;

The top of the front surface of the lifting plate 81 is movably connected with a protective cover 88 through a rotating shaft, the left side and the right side of the protective cover 88 are provided with reserved grooves 86, the surface of the protective cover 88 is provided with a through hole 87, the surface of the rotating shaft is sleeved with a torsion spring III, and two ends of the torsion spring III are fixedly connected with the lifting plate 81 and the protective cover 88 respectively;

The center of the rear side of the front surface of the lifting plate 81 is movably provided with clamping assemblies 89, each clamping assembly 89 comprises two connecting plates 891, the number of the connecting plates 891 is two, the two connecting plates are respectively fixedly welded on the left side and the right side of the rear side of the lifting plate 81, a rotating rod 895 is fixedly welded between the two connecting plates 891, and the left side and the right side of the surface of the rotating rod 895 are movably sleeved with a torsion spring II 892;

Two ends of the torsion spring II 892 are fixedly connected with the connecting plate 891 and the clamping plate 893 respectively, the bottom of the front side of the clamping plate 893 is fixedly connected with a spring 894, and the front side of the spring 894 is fixedly connected with the rear side of the lifting plate 81;

Through the use of mounting panel 9, can conveniently install fixed plate 1 in the required position, through the use of stay cord one 12, can conveniently stimulate lifter plate 81 and upwards move, through the use of slide bar 4 and sliding sleeve 85, can carry out spacingly to the removal of lifter plate 81, thereby avoid its in-process that reciprocates to take place to rock, through the use of limit angle 83, can conveniently carry out spacingly to bottom plate 31, through the use of spacing subassembly 82, can conveniently spacing bottom plate 31 in limit angle 83 inside, through the use of protective cover 88, can protect monitoring module 3, avoid it to receive the damage at the in-process of monitoring, through the use of through-hole 87, can conveniently detect the outside flue gas of module 3 monitoring, through the use of joint subassembly 89 and joint groove 7, can carry out spacingly to lifter plate 81, avoid it whereabouts;

the application method of the smoke monitoring equipment for fire supervision comprises the following steps:

A: fixing the fixing plate 1 at a required installation position through the installation plate 9, penetrating a screw into the installation plate 9 for fixing, then pulling the first clamping plate 893 downwards, so that the lifting plate 81 moves upwards, in the process of moving the lifting plate 81 upwards, the clamping groove 7 extrudes the clamping plate 893, so that the spring 894 is compressed, meanwhile, the second torsion spring 892 is twisted, when the lifting plate 81 moves upwards to a proper position, pulling of the first clamping plate 12 is stopped, at the moment, the spring 894 rebounds, the second torsion spring 892 resets, so that the clamping plate 893 resets, so that the lifting plate 81 is fixed at a required position, and then surrounding smoke is detected through the smoke sensor 33;

B: when the smoke sensor 33 detects smoke, the smoke sensor sends a signal to the controller 2, the controller 2 sends the signal to the display screen 32 for displaying, and meanwhile, the controller 2 controls the alarm 5 to give an alarm so as to achieve an alarm effect;

C: when the monitoring assembly 3 needs to be taken down, the operation controller 2 starts the small-sized electric push rod 8101, the telescopic end is contracted, the pull rope two 8103 is driven to move downwards, the clamping plate 893 is pulled forwards, at the moment, the lifting plate 81 freely falls down, when the lifting plate falls down to the lowest position, the limiting plate 822 is rotated, the torsion spring one 823 is twisted, the limiting plate 822 is separated from the surface of the bottom plate 31, and then the limiting plate 822 is taken out from the inside of the limiting angle 83, so that the monitoring assembly can be detached.

To sum up: according to the smoke monitoring equipment for fire supervision and the application method thereof, through the cooperation of the display screen 32, the smoke sensor 33, the sliding rod 4, the alarm 5, the mounting groove 84, the sliding sleeve 85, the reserved groove 86, the through hole 87, the protective cover 88, the connecting plate 891, the torsion spring II 892, the clamping plate 893, the spring 894, the rotating rod 895, the small electric push rod 8101, the limiting ring 8102, the pull rope II 8103, the mounting plate 9, the groove II 10, the sliding ring 11 and the pull rope I12, the problem that the existing monitoring device cannot be used for adjusting the height is solved, so that smoke with different heights cannot be detected, meanwhile, the smoke cannot be disassembled and overhauled conveniently after being mounted, remote alarm cannot be carried out, and the problem that the smoke cannot be perceived quickly is solved.

Claims (9)

1. The utility model provides a fire control is flue gas monitoring facilities for supervision, includes fixed plate (1), its characterized in that: the utility model discloses a smoke sensor, including fixed plate (1), bottom fixed mounting on the right side has controller (2), the left and right sides on fixed plate (1) front surface has all seted up recess one (6), the inner chamber vertical fixedly connected with slide bar (4) of recess one (6), joint groove (7) have been seted up in the center department on fixed plate (1) front surface, the front side of fixed plate (1) is provided with installation component (8), the front side of installation component (8) is provided with monitoring component (3), monitoring component (3) include bottom plate (31), the top fixed mounting on bottom plate (31) front surface has display screen (32), the bottom fixed mounting on bottom plate (31) front surface has smoke sensor (33), the center department of fixed plate (1) rear side has seted up recess two (10), the top of fixed plate (1) front surface and the inner wall of recess two (10) are all fixedly connected with slip ring (11), run through in slip ring (11) is provided with slip ring (12).

2. A fire supervision flue gas monitoring device according to claim 1, wherein: the top and the bottom of the left side and the right side of the fixed plate (1) are fixedly welded with mounting plates (9), and mounting holes are formed in the front surface of each mounting plate (9) in a penetrating mode.

3. A fire supervision flue gas monitoring device according to claim 1, wherein: the installation component (8) is including lifter plate (81), the four corners of lifter plate (81) back surface all fixedly welded with sliding sleeve (85), the surface of slide bar (4) is located to sliding sleeve (85) sliding sleeve, the four corners of lifter plate (81) front surface all fixedly welded with spacing angle (83), mounting groove (84) have been seted up in the center department of lifter plate (81) front surface, the bottom fixedly connected with pulling force subassembly (810) of mounting groove (84) inner chamber.

4. A fire supervision flue gas monitoring device according to claim 3, wherein: the tension assembly (810) comprises a small electric push rod (8101), the small electric push rod (8101) is fixedly arranged at the bottom of the inner cavity of the mounting groove (84), a second stay cord (8103) is fixedly connected to the telescopic end of the small electric push rod (8101), a limiting ring (8102) is sleeved on the outer surface of the second stay cord (8103), the rear side of the limiting ring (8102) is fixedly connected to the top of the inner cavity of the mounting groove (84), and a round hole is formed in the top of the inner cavity of the mounting groove (84) in a penetrating mode.

5. A fire supervision flue gas monitoring device according to claim 3, wherein: limiting components (82) are fixedly installed on the left side and the right side of the front surface of the lifting plate (81), each limiting component (82) comprises a fixing rod (821), a limiting plate (822) is movably sleeved on the front side of the surface of each fixing rod (821), a torsion spring I (823) is sleeved on the surface of each fixing rod (821), the front end of each torsion spring I (823) is fixedly connected to the rear side of each limiting plate (822), and the rear side of each torsion spring I (823) is fixedly connected to the front side of the lifting plate (81).

6. A fire supervision flue gas monitoring device according to claim 3, wherein: the top of lifter plate (81) front surface has shield cap (88) through pivot swing joint, reservation groove (86) have all been seted up to the left and right sides of shield cap (88), through-hole (87) have been seted up on the surface of shield cap (88), and the surface cover of pivot is equipped with torsional spring three, and the both ends of torsional spring three are respectively with lifter plate (81) and shield cap (88) fixed connection.

7. A fire supervision flue gas monitoring device according to claim 3, wherein: the center department movable mounting of lifter plate (81) front surface rear side has joint subassembly (89), joint subassembly (89) are including connecting plate (891), the quantity of connecting plate (891) is two, and fixed welding has bull stick (895) in the left and right sides of lifter plate (81) rear side respectively between two connecting plates (891), the equal movable sleeve in left and right sides on bull stick (895) surface is equipped with torsional spring two (892).

8. The fire supervision flue gas monitoring device according to claim 7, wherein: two ends of the torsion spring II (892) are fixedly connected with the connecting plate (891) and the clamping plate (893) respectively, a spring (894) is fixedly connected to the bottom of the front side of the clamping plate (893), and the front side of the spring (894) is fixedly connected with the rear side of the lifting plate (81).

9. A method of using a fire supervision flue gas monitoring device according to any one of the claims 1 to 8, comprising the steps of:

a: fixing the fixing plate (1) at a position where installation is needed through the installing plate (9), penetrating a screw into the installing plate (9) to fix, then pulling the first pull rope (12) downwards, so that the lifting plate (81) moves upwards, in the process of moving the lifting plate (81) upwards, the clamping groove (7) extrudes the clamping plate (893), so that the spring (894) is compressed, meanwhile, the second torsion spring (892) is twisted, when the lifting plate (81) moves upwards to a proper position, pulling of the first pull rope (12) is stopped, at the moment, the spring (894) rebounds, the second torsion spring (892) is reset, so that the clamping plate (893) is reset, so that the lifting plate (81) is fixed at a needed position, and then surrounding smoke is detected through the smoke sensor (33);

B: when the smoke sensor (33) detects smoke, the smoke sensor sends a signal to the controller (2), the controller (2) sends the signal to the display screen (32) for displaying, and meanwhile, the controller (2) controls the alarm (5) to give an alarm so as to achieve an alarm effect;

C: when the monitoring component (3) needs to be taken down, the operation controller (2) starts the small-sized electric push rod (8101), the telescopic end is contracted, the pull rope II (8103) is driven to move downwards, the clamping plate (893) is pulled forwards, at the moment, the lifting plate (81) freely falls down, when the lifting plate falls down to the lowest position, the limiting plate (822) is rotated, the torsion spring I (823) is twisted, the limiting plate (822) is separated from the surface of the bottom plate (31), and then the lifting plate is taken out from the inside of the limiting angle (83), so that the lifting plate can be detached.