CN201574651U

CN201574651U - Air-pressure internally-circulating automatic-compensation and control door closer

Info

Publication number: CN201574651U
Application number: CN2009202976925U
Authority: CN
Inventors: 吴丰庆
Original assignee: Ximeike (Guangzhou) Industrial Co Ltd
Current assignee: Ximeike (Guangzhou) Industrial Co Ltd
Priority date: 2009-12-16
Filing date: 2009-12-16
Publication date: 2010-09-08
Anticipated expiration: 2019-12-16

Abstract

The utility model belongs to door closers, and particularly relates to an air-pressure internally-circulating automatic-compensation and control door closer, which includes a cylinder body and a retractable rod, wherein an air-feeding unidirectional valve which can supply a cavity inside the cylinder body with air in one direction when the door is opened is arranged at the other end of the cylinder; the end part of the retractable rod arranged inside the cylinder body is connected with an adjusting valve device which can enable air in the cylinder to circulate in the cavity of the cylinder when the retractable rod is in the motion state; an inner cover sealing device is fixed inside the end cover; a great compression spring is arranged in a cavity between the inner cover sealing device and the adjusting valve device; the cavity inside the cylinder body is divided into two automatic pressurization and compensation air cavities through the inner cover sealing device, the adjusting valve device and the air feeding valve; and when the door is closed or opened, the interior air of the cavity inside the cylinder body can circulate inside the two air cavities. The air-control door sealer can ensure the air circulation in the cylinder body, reduce the pollution of continuously entering and leaving air to the lubricating oil on the cylinder wall, ensure the lubrication effect of the lubrication oil, realize the normal operation of the door closer, and effectively prolong the service life of the door closer. The door closer has the advantages of good damping effect and low noise when closing the door.

Description

Air pressure internal circulation type automatic compensation control door closer

Technical field

The utility model belongs to door closer, is specifically related to a kind of air pressure internal circulation type automatic compensation control door closer.

Background technology

At present; in the office space or some public places; usually can between door and doorframe, door closer be installed; opening the back when door understands under the effect of the elastic-restoring force of door closer door is shut automatically; after can guaranteeing that door is unlocked; be closed to initial position accurately and timely, very big facility be provided for people's life.

Door closer drives the source by it roughly can be divided into fluid pressure type door closer and Pneumatic-control type door closer.Fluid pressure type door closer internal construction is comparatively complicated, is not easy to apply, and in the prior art, using more generally is the Pneumatic-control type door closer.

In the prior art, someone has done concrete improvement with regard to the Pneumatic-control type door closer, for example: the patent No. is 200720181355.0, denomination of invention is a kind of utility model patent of door closer isokinetic device, this door closer can reduce telescopic arm involution speed and promptly slow down door leaf involution initial velocity, reach the effect that omnidistance constant speed is closed the door, but because its pneumatic cylinder casing wall is provided with air hole, outside air constantly passes in and out, and since air in be mingled with dust, be doped in the lubrication oil of casing wall and casing wall when more dust after, the lubrication oil that the has mixed dust through hole of casing wall that very easily results in blockage, make door closer to work normally, in addition, because the existence of more dust in the lubrication oil, also make the lubricant effect variation of lubrication oil, a little less than the lubricating ability, increase its frictional force, reduced the application life of door closer.

The utility model content

The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of air pressure internal circulation type automatic compensation control door closer is provided, this door closer guarantees that air substantially all circulates in cylinder block, reduced of the pollution of the dust in air of continuous turnover to lubrication oil in the cylinder wall, guarantee the lubricant effect of lubrication oil, door closer can be worked normally, prolonged the application life of door closer effectively.

In order to realize above-mentioned technical purpose, the utility model is realized by following technical scheme:

Pneumatic-control type door closer described in the utility model, comprise cylinder block and be arranged in an end end caps of cylinder block and freely stretch and carry out the expansion link of switch door, it is characterized in that: the other end of described cylinder block is provided with can be to the breather cheek valve device of the unidirectional air inlet of cylinder block internal cavities when opening the door, the end of the described expansion link that places cylinder block inside connects when the expansion link control valve device that gas can circulate in the cylinder block cavity in the cylinder block during in motion state, the cylinder block empty cavity position at the inner place of described end cap be set with and expansion link between sealing and all form the interior cap sealing of hermetic seal with the cylinder block inwall, be provided with big compression spring in the cavity between cap sealing and the control valve device in described; Described cylinder block inner chamber body is divided into two air cavitys that can pressurize automatically, compensate automatically by interior cap sealing, control valve device and admission valve device, and when the open and close door, cylinder block inner chamber body gas inside circulates in these two air cavitys.

Further improvement as above-mentioned technology, cap sealing comprises and is set in the outer and inner cap of cylinder block inner wall sealing of expansion link, the sealing block that has groove, packing ring successively in described, described packing ring is embedded in the groove of sealing block, and between inner cap and sealing block, the cylinder block internal face, between inner cap inside wall and the O-ring seal and all be provided with the O-ring seal that is used to seal between sealing block and the expansion link.

In the utility model, described control valve device comprises and is connected in the free-ended plunger bushing of expansion link, one end of described plunger bushing cooperates clamping with the free end of expansion link, the other end is provided with open pore, be equipped with valve pocket in its open pore from outside to inside successively, first spool, described valve pocket, the inside of first spool is provided with central through hole, described first spool place in the centre bore of terminal position of valve pocket and and valve pocket between be sealed and matched, be provided with first pin that is sealed and matched with the first spool internal face in the central through hole of described first spool, be provided with little compression spring between the bottom of the central through hole of the bottom of described first pin and valve pocket head position, be symmetrically arranged with some air vents on the described plunger bushing, the outside wall surface of described valve pocket is provided with the gas channel for circulation of air.

In order to realize the speed-regulating function of the utility model door closer, be threaded between described plunger bushing and the valve pocket end, be provided with in the inner chamber body of described plunger bushing and between the medium position of valve pocket can ccontaining air the space.By valve pocket being screwed or screws out the size in the space that changes ccontaining air in the plunger bushing, change the flowing velocity of air-flow, regulate the close the door purpose of speed of door closer preferably thereby reach.

In order to improve sealing performance of the present utility model, between the end outer wall and cylinder block inwall of described plunger bushing, between the inwall of first spool and valve pocket, the outer wall of valve pocket is provided with O-ring seal.

In the utility model, the terminal part of described expansion link is provided with annular groove, described plunger bushing is provided with boss, between described expansion link and the plunger bushing by this annular groove and the corresponding clamping of boss, each parts that makes expansion link can not drive when rotating in the door closer cylinder block rotate, and guarantee the service behaviour that door closer is stable.

Further improvement as above-mentioned technology, described breather cheek valve device comprises rotation hand wheel, be provided with the central through hole that has step surface in the described rotation hand wheel, be arranged at second spool that is sealed and matched with rotation hand wheel in the described central through hole that places the rotation hand wheel head, described second valve core inside also is provided with centre bore, the wherein intracardiac head pin that cooperates with second seal spool that is provided with, be provided with little compression spring between the bottom of described head pin and the end station terrace of rotation hand wheel central through hole, and the central hole size of the valve pocket in the tip dimensions of described rotation hand wheel and the control valve device cooperates.

In the utility model, spacing in order better the end of big compression spring to be carried out, the inwall of the cylinder block of the corresponding side of described breather cheek valve device is provided with the spring card article that is used to block big compression spring.

In the utility model, the end centre bore of described valve pocket is hexagonal hole or cubic hole.When closing fully, end centre bore by valve pocket cooperates fully with rotation hand wheel, can rotate valve pocket by rotation hand wheel, can reach the purpose with valve pocket precession plunger bushing or back-out plunger bushing, and then reach the speed of closing the door of adjusting effectively, to satisfy client's demand better.

In addition, for the ease of changing each part of cylinder block inside, be mutual engagement connection between described end cap and the cylinder block openend.When needing repairing or changing, end cap is opened got final product, convenient and practical.

Compared with prior art, the beneficial effects of the utility model are:

(1) door closer of the present utility model is a kind of air pressure internal circulation type automatic compensation door closer, this door closer is by the breather cheek valve device, control valve device and the interior cap sealing that places the inner chamber place of cylinder block the other end to establish, when opening the door, expansion link is in elongation process gradually, cavity between control valve device and the breather cheek valve device forms negative pressure, the cavity of air in this moment between cap sealing and the control valve device between breather cheek valve device and control valve device flows into, in case of necessity, the inner chamber opened to cylinder block of breather cheek valve device carries out tonifying Qi (mainly sucking air by the breather cheek valve device when using for the first time).And ought be automatically at closing time, expansion link is withdrawn under the effect of the elastic-restoring force of big compression spring, cavity between interior cap sealing and the control valve device forms negative pressure, this moment, the breather cheek valve device was in the hermetic seal state, air can not leaked, cavity in air between control valve device and the breather cheek valve device then enters by control valve device between cap sealing and the control valve device, the gas in the cylinder still only circulates in cylinder interior.Can pressurize automatically in two air cavitys in the cylinder block, compensate automatically, even if opening the door repeatedly closed the door, gas does not leak in the cylinder block, but circulate in cylinder block inside, therefore avoided repeatedly the passing in and out of air of outside and pollute for the lubrication oil of cylinder block inwall and influence the normal use and the application life of door closer; More air supply between breather cheek valve device and the control valve device provides bigger resistance for the answer of expansion link; make that damping was good when the expansion link withdrawal resetted; can guarantee does not better have bigger impact when the door body is closed; noise is little; go back shutter body or doorframe simultaneously and can not damage, practical.

(2) the utility model can be adjusted the movement velocity of door closer expansion link according to user's self needs, thereby regulates the speed that door closer is closed the door, and is convenient and practical.

Description of drawings

Below in conjunction with the drawings and specific embodiments the utility model is described in detail:

Fig. 1 is the door closer status architecture schematic diagram when closing halted state behind the door in the utility model.

Fig. 2 is an A place enlarged diagram among above-mentioned Fig. 1.

Fig. 3 is a door closer status architecture schematic diagram in the process of opening the door in the utility model.

Fig. 4 is a B place enlarged diagram among above-mentioned Fig. 2.

Fig. 5 is a C place enlarged diagram among above-mentioned Fig. 2.

Fig. 6 is a door closer status architecture schematic diagram when opening the door the back halted state in the utility model.

Fig. 7 is a door closer status architecture schematic diagram in the process of closing the door in the utility model.

The specific embodiment

As shown in Figure 1, air pressure internal circulation type automatic compensation control door closer described in the utility model, comprise cylinder block 1 and be arranged in an end end cap 11 places of cylinder block 1 and the expansion link 2 that freely stretches and carry out the switch door, the other end of described cylinder block 1 is provided with the breather cheek valve device 3 that can carry out unidirectional air inlet when opening the door to cylinder block 1 internal cavities, the described end that places the expansion link 2 of cylinder block 1 inside is connected with itself and breather cheek valve device 3 corresponding matching realization hermetic seal when a door body is in closed condition, and the control valve device 4 that gas can flow in cylinder block 1 cavity in the cylinder block 1 when opening the door, cylinder block 1 empty cavity positions at described end cap 11 inner places be set with and expansion link 2 between sealing and all form the interior cap sealing 5 of hermetic seal with cylinder block 1 inwall, be provided with big compression spring 6 in the cavity between cap sealing 5 and the control valve device 4 in described; When opening the door, described cylinder block 1 inner chamber body is divided into two air cavitys by interior cap sealing 5, control valve device 4 and admission valve device, promptly as Fig. 3, Fig. 6, proparea I and back zone II shown in Figure 7.

As seen from Figure 1, Figure 2, cap sealing 5 comprises and is set in the outer and inner cap 51 of cylinder block 1 inner wall sealing of expansion link 2, the sealing block 52 that has groove, packing ring 53 successively in described, described packing ring 53 is embedded in the groove of sealing block 52, and inner cap 51 and sealing block 52 and and cylinder block 1 internal face between be provided with O-ring seal 54, also all be provided with the O-

ring seal

55,56 that is used to seal between inner cap 51 inside walls and the sealing block and between sealing block 52 and the expansion link 2.In addition, an end of big spring 6 is conflicted in the end of sealing block 52.

In the utility model, as Fig. 3, shown in Figure 4, described control valve device 4 comprises and is connected in expansion link 2 free-ended plunger bushings 41, one end of described plunger bushing 41 cooperates clamping with the free end of expansion link 2, the other end is provided with open pore, be equipped with valve pocket 42 in its open pore from outside to inside successively, first spool 43, described valve pocket 42, the inside of first spool 43 is provided with central through hole, described first spool 43 place in the centre bore of terminal position of valve pocket 42 and and valve pocket 42 between be sealed and matched, be provided with first pin 44 that the termination portion with first spool, 43 internal faces is sealed and matched in the central through hole of described first spool 43, be provided with little compression spring 45 between the bottom of the bottom of described first pin 44 and the central through hole of valve pocket 42 head positions, be symmetrically arranged with some air vents 411 on the described plunger bushing 41, the outside wall surface of described valve pocket 42 is provided with the gas channel 421 for circulation of air.

In addition, as shown in Figure 4, be threaded between described plunger bushing 41 and valve pocket 42 ends, and be provided with in the inner chamber body of plunger bushing 41 and between the medium position of valve pocket 42 can ccontaining air space III.By valve pocket 42 being screwed or screws out the size that plunger bushing 41 can change the space of ccontaining air in real time, also be that it can change air-flow from the flowing velocity between proparea I district and the back zone II district, regulate the close the door purpose of speed of door closer preferably thereby reach.

In order to improve sealing effectiveness, the end of described plunger bushing 41 is provided with O-ring seal 46, and the outer wall that is provided with O-ring seal 47, valve pocket 42 between the inwall of described first spool 43 and valve pocket 42 is provided with O-ring seal 48.

In the utility model, the terminal part of described expansion link 2 is provided with annular groove, and described plunger bushing 41 is provided with boss, between described expansion link 2 and the plunger bushing 41 by this annular groove and the corresponding clamping of boss.Each parts that makes expansion link 2 can not drive in the door closer cylinder block 1 when rotating rotate, and guarantee the service behaviour that door closer is stable.

In the utility model, as Fig. 3, shown in Figure 5, described breather cheek valve device 3 comprises rotation hand wheel 31, be provided with the central through hole that has step surface in the described rotation hand wheel 31, be arranged at second spool 32 that is sealed and matched with rotation hand wheel 31 in the described central through hole that places rotation hand wheel 31 heads, described second spool 32 inside also are provided with centre bore, wherein intracardiac second pin 33 that is sealed and matched with second spool 32 that be provided with, be provided with little compression spring 34 between the bottom of described second pin 33 and the end station terrace of rotation hand wheel 31 central through holes, and the central hole size corresponding matching of the valve pocket 42 in the tip dimensions of described rotation hand wheel 31 and the control valve device 4, and the end centre bore of valve pocket 42 is hexagonal hole or cubic hole, when closing fully, end centre bore by valve pocket 42 cooperates fully with rotation hand wheel 31, can be by rotation hand wheel 31 rotation valve pockets 42, and then reach the speed of closing the door of adjusting effectively, to satisfy client's demand better.In addition, gas sealing ability in order to ensure breather cheek valve device 3, between the described rotation hand wheel 31 and second spool 32 O-ring seal 35 is installed, also be provided with O-ring seal 36 between the cavity inner wall at the open end place of rotation hand wheel 31 and cylinder block 1, make, when opening the door, gas can enter cylinder block 1 inside from the central through hole of rotation hand wheel 31 cylinder block 1 is carried out tonifying Qi, in the process of closing the door, accomplish gas sealing ability preferably, guarantee the good functional performance of door closer.

As Fig. 1, Fig. 3, Fig. 6, shown in Figure 7, the inwall of the cylinder block 1 of described breather cheek valve device 3 the same sides is provided with the spring card article 7 that is used to block big compression spring 6.

In the utility model, be mutual engagement connection between described end cap 11 and cylinder block 1 openend, be detachable installation, can be convenient for changing the inner body of cylinder block 1 or keep in repair, cleaning etc.

The course of work of the utility model Pneumatic-control type door closer is as follows:

Be illustrated in figure 1 as the pass behind the door, the structural scheme of mechanism of door closer during inactive state, this moment expansion link 2 maximum lengths indentation cylinder block 1 inside, closely cooperate between breather cheek valve device 3 and the control valve device 4, the proparea I and the back zone II that cylinder block 1 internal cavities are divided into control valve device 4, the compressed air of back zone II is by the air vent 411 of plunger bushing 41, the gas channel 421 of valve pocket 42 flows to the proparea, and proparea I is at the O-ring seal of plunger bushing, the O-ring seal 54 of interior cap sealing 5,55, under 56 the tension force, proparea I forms the air compressional zone of maximum empty tolerance, and back zone II promptly forms the region of no pressure of negative pressure.At this moment, can regulate at closing time speed by the regulating handle that rotates rotation hand wheel 31, normally, clockwise direction rotates to be decelerations of closing the door, and counter clockwise direction rotates to be fast closes the door, and can regulate according to user's self-demand, convenient and practical.

Door closer status architecture schematic diagram in the process of opening the door as shown in Figure 3.When opening the door, expansion link 2 drives control valve device 4 and moves to the proparea, at this moment, expansion link 2 is in elongation process gradually, carry out tonifying Qi from breather cheek valve device 3 to the inner chamber of cylinder block 1, proparea I compressed air simultaneously between cap sealing 5 and the control valve device 4 also back zone air cavity between breather cheek valve device 3 and control valve device 4 flows into, make the air supply of back zone II increase gradually, when Men Kaizhi 90 degree maximum magnitudes, promptly as shown in Figure 6, at this moment, compress spring 6 greatly and be compressed to the largest deformation amount, it is maximum that the aperture maximum of door, the air supply of back zone II air cavity reach.

As shown in Figure 7, when automatically at closing time, expansion link 2 is withdrawn under the effect of the elastic-restoring force of big compression spring 6, breather cheek valve device 3 is in the hermetic seal state, the compressed air of back zone II can not drawn off, substantially kept the air capacity in the cylinder block 1, cylinder block 1 gas inside is recycled, when expansion link 2 slowly resets under the effect of the restoring force of big compression spring 6, the compressed air of back zone II is by the gas channel 421 of valve pocket 42, the air vent 411 of plunger bushing 41 and space III flow to proparea I, because back zone II compressed air is slowly to flow into proparea I's, make expansion link 2 when replying, reset speed is slow, have damping effect preferably, avoid crushing the people, also reduce noise at closing time simultaneously being unlikely to shut rapidly at closing time, and bigger impact and the damage of opposite house body and doorframe between itself and the doorframe when having prevented the door body to shut, guaranteed application life of door.

The utility model is applicable to the door body of any structure, its mounting means is a mounting means commonly used at present, generally all be that it is installed in a position, the fixed end of expansion link 2 is mounted in the tip position of a body, and the end of cylinder block 1 is installed on the doorframe or between the doorframe.

The utility model is not limited to above-mentioned embodiment, if various changes of the present utility model or modification are not broken away from spirit and scope of the present utility model, if these are changed and modification belongs within claim of the present utility model and the equivalent technologies scope, then the utility model also comprises these changes and modification.

Claims

1. air pressure internal circulation type automatic compensation control door closer, comprise cylinder block and be arranged in an end end caps of cylinder block and freely stretch and carry out the expansion link of switch door, it is characterized in that: the other end of described cylinder block is provided with can be to the breather cheek valve device of the unidirectional air inlet of cylinder block internal cavities when opening the door, the end of the described expansion link that places cylinder block inside connects when the expansion link control valve device that gas can circulate in the cylinder block cavity in the cylinder block during in motion state, the cylinder block empty cavity position at the inner place of described end cap be set with and expansion link between sealing and all form the interior cap sealing of hermetic seal with the cylinder block inwall, be provided with big compression spring in the cavity between cap sealing and the control valve device in described; Described cylinder block inner chamber body is divided into two air cavitys that can pressurize automatically, compensate automatically by interior cap sealing, control valve device and admission valve device, and when the open and close door, cylinder block inner chamber body gas inside circulates in these two air cavitys.

2. air pressure internal circulation type automatic compensation control door closer according to claim 1, it is characterized in that: cap sealing comprises and is set in the outer and inner cap of cylinder block inner wall sealing of expansion link, the sealing block that has groove, packing ring successively in described, described packing ring is embedded in the groove of sealing block, and between inner cap and sealing block, the cylinder block internal face, between inner cap inside wall and the O-ring seal and all be provided with the O-ring seal that is used to seal between sealing block and the expansion link.

3. air pressure internal circulation type automatic compensation control door closer according to claim 2, it is characterized in that: described control valve device comprises and is connected in the free-ended plunger bushing of expansion link, one end of described plunger bushing cooperates clamping with the free end of expansion link, the other end is provided with open pore, be equipped with valve pocket in its open pore from outside to inside successively, first spool, described valve pocket, the inside of first spool is provided with central through hole, described first spool place in the centre bore of terminal position of valve pocket and and valve pocket between be sealed and matched, be provided with first pin that is sealed and matched with the spool internal face in the central through hole of described first spool, be provided with little compression spring between the bottom of the central through hole of the bottom of described first pin and valve pocket head position, be symmetrically arranged with some air vents on the described plunger bushing, the outside wall surface of described valve pocket is provided with the gas channel for circulation of air.

4. air pressure internal circulation type automatic compensation control door closer according to claim 3 is characterized in that: be threaded between described plunger bushing and the valve pocket end, be provided with in the inner chamber body of described plunger bushing and between the medium position of valve pocket can ccontaining air the space.

5. air pressure internal circulation type automatic compensation control door closer according to claim 4 is characterized in that: between the end outer wall and cylinder block inwall of described plunger bushing, between the inwall of first spool and valve pocket, the outer wall of valve pocket is provided with O-ring seal.

6. air pressure internal circulation type automatic compensation control door closer according to claim 5, it is characterized in that: the terminal part of described expansion link is provided with annular groove, described plunger bushing is provided with boss, between described expansion link and the plunger bushing by this annular groove and the corresponding clamping of boss.

7. air pressure internal circulation type automatic compensation control door closer according to claim 6, it is characterized in that: described breather cheek valve device comprises rotation hand wheel, be provided with the central through hole that has step surface in the described rotation hand wheel, be arranged at second spool that is sealed and matched with rotation hand wheel in the described central through hole that places the rotation hand wheel head, described second valve core inside also is provided with centre bore, the wherein intracardiac head pin that cooperates with second seal spool that is provided with, be provided with little compression spring between the bottom of described head pin and the end station terrace of rotation hand wheel central through hole, and the central hole size of the valve pocket in the tip dimensions of described rotation hand wheel and the control valve device cooperates.

8. air pressure internal circulation type automatic compensation control door closer according to claim 7 is characterized in that: the inwall of the cylinder block of the corresponding side of described breather cheek valve device is provided with the spring card article that is used to block big compression spring.

9. air pressure internal circulation type automatic compensation control door closer according to claim 8 is characterized in that: the end centre bore of described valve pocket is hexagonal hole or cubic hole.

10. air pressure internal circulation type automatic compensation control door closer according to claim 1 is characterized in that: be mutual engagement connection between described end cap and the cylinder block openend.