JP2004036903A - Flow regulating damper device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily set the opening regulating position of a damper blade, to positively fix the regulating position, to reduce cost by simplifying and miniaturizing the structure of an opening regulating means, and to secure a sufficient working space for assembly, regulation, and the like even in a limited space around a damper body in a flow regulating damper device. <P>SOLUTION: The opening regulating means A is provided with an operating member 4 disposed at the side part of the damper body movably by a prescribed quantity in the axial direction of a damper shaft 2 and connected out of relative rotation to the damper shaft 2; a stopper member 5 fixedly disposed at the side part of the damper body 1; a rugged engaging means E having a recessed part 5h and a projecting part 4p provided at either the stopper body 5 or the operating member 4 respectively, and capable of selectively fixing the rotating position of the damper shaft in a plurality of stages; and a return spring S for energizing the operating means 4 in a direction of maintaining the engagement of the recessed part 5h and projecting part 4p of the rugged engaging means E. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
According to the present invention, there is provided a damper main body having a cylindrical shape and having a fluid passage inside, a damper shaft rotatably supported by the damper body and crossing the fluid passage, and a damper shaft fixed to the damper shaft. The present invention relates to a damper device for adjusting a flow rate, the damper device including a damper blade that varies an opening degree of the fluid passage by integrally rotating.
[0002]
[Prior art]
Conventionally, as the above-mentioned damper device for adjusting the flow rate, a damper shaft is driven by an electric motor interlocked with the damper shaft to adjust the damper blade to an arbitrary opening degree (motor driven type), and a worm gear device is used for the damper shaft. The damper blades can be adjusted to an arbitrary opening by manually rotating the damper blades (worm gear type), or the operating position of the operating lever linked to the damper shaft can be fixed by screw means and the damper blades can be adjusted to an arbitrary opening. (Operation lever type) and the like are known.
[0003]
[Problems to be solved by the invention]
However, in any of the above methods, the opening adjustment means (electric motor, worm gear device, operation lever and screw means for fixing the operation position) requires a relatively large installation space, so that the space around the damper body is limited. Work space for maintenance, assembling, adjustment, etc. of the opening adjustment means cannot be sufficiently secured in the open space, making work difficult and reducing work efficiency. In the case where a heat insulating material is provided around, there is a problem in that the opening degree adjusting means occupying a large area of the operation unit may hinder the construction.
[0004]
In any of the above methods, the structure of the opening adjustment means (motor, worm gear device, operation lever and screw means for fixing the operation position thereof) is relatively complicated, the production cost is increased, and especially the operation lever type is used. In this case, there is a problem that the adjusting operation is troublesome, the screw means is loosened due to vibration or the like, and the adjustment position is likely to be out of order, and the screw means is repeatedly tightened and loosened, thereby impairing durability. In addition, the motor drive type requires special equipment such as a power supply, wiring, and a control device, which increases the equipment cost. In addition, both the motor drive type and the worm gear type take into account the deterioration and corrosion of the device. It requires regular maintenance and maintenance, which raises the problem of increased maintenance costs.
[0005]
The present invention has been proposed in view of the above circumstances, and an object of the present invention is to provide a flow rate adjusting damper device that can solve the conventional problems at once.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a first aspect of the present invention provides a damper body having a cylindrical shape and having a fluid passage therein, a damper shaft rotatably supported by the damper body and crossing the fluid passage; A damper blade fixed to the damper shaft, the opening of the fluid passage being variable by integral rotation with the damper shaft, and an opening adjusting means for manually adjusting the opening of the damper blade. In the damper device for adjustment, the opening degree adjusting means is disposed on a side portion of the damper main body so as to be movable by a predetermined amount in the axial direction of the damper shaft, and is connected to the damper shaft so as to be relatively non-rotatable. A member, a stopper member fixedly disposed on a side portion of the damper body corresponding to the operation member, and a concave portion and a convex portion provided on one or the other of the stopper member and the operation member, respectively. Having them recesses and The rotational position of the damper shaft can be selected and fixed in a plurality of steps by the engagement of the convex portion, and the concave / convex engaging means can be fixed, and the return member for urging the operating member in a direction to maintain the engagement between the concave portion and the convex portion. A spring, and the engaging state of the concave-convex engaging means can be released at any time by pushing or pulling the operating member in the axial direction of the damper shaft against the urging force of the return spring. And
[0007]
According to the first aspect of the present invention, when adjusting the opening degree of the damper blade, the operating member is manually pushed or pulled in the axial direction of the damper shaft against the urging force of the return spring, thereby adjusting the opening position in steps. The engagement state of the concave and convex engagement means which is set temporarily can be temporarily released, and in the released state, the operating member is rotated by hand to select and set a desired opening position, and the opening degree is set. After the position is set, it is only necessary to return the concave / convex engaging means to the engaged state again by the urging force of the return spring. Therefore, setting the adjustment position as a whole is extremely easy, and after the setting, the adjustment position is surely secured. , Which is effective in preventing deviation of the adjustment opening due to vibration and the like. In addition, the opening position is set by simple uneven engagement of the uneven engagement means cooperating with the return spring, and the setting structure is extremely simple. Cost reduction of management is achieved. Further, the damper shaft can be manually and directly driven to rotate by an operation member coaxial with the damper shaft, so that the number of components of the damper blade opening adjusting means can be reduced, and the structure of the adjusting means can be simplified and downsized. In addition, equipment such as power supply and wiring is not required, which not only reduces manufacturing costs, but also performs maintenance, assembling, and adjustment work on the opening adjustment means even in a limited space around the damper body. A sufficient space can be secured, the work becomes difficult, and the work efficiency can be improved. Further, even when a heat insulating material is provided around the damper main body, there is almost no possibility that the opening adjustment means may hinder the construction.
[0008]
According to a second aspect of the present invention, in addition to the first aspect, the operating member is formed integrally with the damper shaft which is slidably supported in the damper body in the axial direction. And a gap is provided between the inner surface of the damper body and the damper blade to allow the damper shaft and the damper blade to move in the axial direction in conjunction with the pushing or pulling of the operating member. It is characterized by. According to this feature, by integrating the damper shaft and the operation member, the number of components is reduced accordingly, and the cost is reduced. Further, even if the damper shaft (and thus the damper blade) moves due to the integration, the operation member can be smoothly pushed or pulled because the damper blade does not interfere with the damper body.
[0009]
According to a third aspect of the present invention, in addition to the features of the first aspect, the operating member is configured separately from the damper shaft and arranged on an extension axis of the damper shaft. Are fitted to each other so as to be relatively slidable in the axial direction of the damper shaft and not to be relatively rotatable. According to this feature, since the operation member is formed separately from the damper shaft, the degree of freedom in design is increased accordingly. Further, the interlocking connection between the two is easily performed by the fitting.
[0010]
According to a fourth aspect of the present invention, in addition to any one of the first to third aspects, the stopper member is provided with a plurality of stages of rotation of the damper shaft in cooperation with an indicator provided on the operating member. It is characterized in that a display unit for displaying the moving position is provided, and according to this feature, it is possible to easily and accurately check the opening with a simple structure.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiments of the present invention will be specifically described below based on embodiments of the present invention illustrated in the accompanying drawings.
[0012]
1 to 3 show a first embodiment of the present invention, wherein FIG. 1 is an overall side view of a damper device for adjusting a flow rate, FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 3 is a view corresponding to FIG. 2 showing a state of a pressing operation on the operation member. 4 to 6 show a second embodiment of the present invention. FIG. 4 is an overall side view of a damper device for adjusting a flow rate, FIG. 5 is a sectional view taken along line 5-5 of FIG. 4, and FIG. FIG. 6 is a view corresponding to FIG.
[0013]
First, referring to FIGS. 1 to 3 showing the first embodiment, a damper device for adjusting a flow rate has a damper body 1 having a cylindrical shape and the inside of which is a part of a fluid passage P, and is rotatable about the damper body 1. A damper shaft 2 that is supported and crosses the fluid passage P, a damper blade 3 fixed to the damper shaft 2 and capable of opening and closing the fluid passage P by integrally rotating with the damper shaft 2, and an opening degree of the damper blade 3 An opening adjustment means A is provided which can be arbitrarily adjusted in a plurality of preset stages. The upstream end and the downstream end of the damper main body 1 are detachably connected to ducts (not shown), and a series of fluid passages P are formed between the ducts and the damper main body 1.
[0014]
The operating member 4 is provided on the side of the damper body 1 so as to be movable by a predetermined amount in the axial direction of the damper shaft 2 and is connected to the damper shaft 2 so as to be relatively non-rotatable. A stopper member 5 fixedly disposed on the side of the damper main body 1 corresponding to the operation member 4, and concave portions 5h and protrusions provided on one and the other of the stopper member 5 and the operation member 4 respectively. A concave / convex engaging means E having a portion 4p and capable of selecting and fixing the rotational position of the damper shaft 2 in a plurality of stages by engaging the concave portion 5h and the convex portion 4p, and the engagement between the concave portion 5h and the convex portion 4p. And a return spring S for urging the operation member 4 in a direction for maintaining the operation force. By pushing or pulling (pushing in the illustrated example) the operating member 4 in the axial direction of the damper shaft 2 against the urging force of the return spring S, the engagement state of the concave-convex engagement means E can be released at any time. Like that.
[0015]
Especially in the first embodiment, the damper shaft 2 to the damper main body 1 is only slidably supported predetermined small stroke s ₀ in the axial direction. One end of the damper shaft 2 extends to the outside of the damper main body 1 on the same axis as the shaft 2, and the extended portion constitutes the operation member 4.
[0016]
The stopper member 5 is formed of a hollow frame that covers most of the operation member 4, and the front outer surface of the front frame 5a is a flat operation surface C. The distal end of the operating member 4 is slidably fitted into the front frame 5a, and an engaging recess 4a for engaging a tool or the like is formed on the distal end surface of the operating member 4.
[0017]
A base portion of a locking piece 6 is fixed to an intermediate portion of the operation member 4, a tip portion of the locking piece 6 extends radially outward of the operation member 4, and a tip portion thereof includes The engagement pin constituting 4p is provided integrally. A plurality of recesses 5h corresponding to the protrusions 4p are formed in the front frame 5a as through holes at regular intervals in the circumferential direction around the axis of the operation member 4. The openings of the recesses 5h appear on the operation surface C and function as a display section of the set opening degree as described later.
[0018]
A lock ring 7 such as a circlip is locked on the outer periphery of the base of the operation member 4, and one end of the return spring S is engaged with the lock ring 7 via a seat plate 8 engaged with the lock ring 7. The other end of the spring S is engaged with the base frame 5b of the stopper member 5. A return spring S, a locking ring 7, a seat plate 8 and the like are housed in the internal space of the base frame 5b, and the return spring S is operated by the operating member in a direction in which the convex portion 4p is engaged with the concave portion h. 4 (therefore, the damper shaft 2) is always energized.
[0019]
Between the inner surface and the damper blade 3 of the damper body 1, the gap s ₀ is provided to permit axial movement of the damper shaft 2 and the damper blade (3) for interlocking the pushing operation of the operating member 4. The special this gap s _0, even slightly sliding damper shaft 2 and the damper blade 3 in conjunction with the axial direction the push operation of the operating member 4, the damper blade 3 is no longer interfere possibility the damper body 1 The smooth sliding of the damper shaft 2 is allowed.
[0020]
The operation surface C of the stopper member 5 is provided with a display unit for displaying the rotational position of the damper shaft 2 in a plurality of steps in cooperation with the engagement pin 4p as an instruction unit provided on the operation member 4. In the illustrated example, the plurality of recesses 5h formed of through holes, a fully open indication “O” provided near the recess 5h at the fully open position, and a full display provided near the recess 5h at the fully closed position are provided as the display section in the illustrated example. The closed display “S” is used.
[0021]
Although not shown, a stopper is provided on the inner peripheral surface of the damper main body 1 for engaging with the outer peripheral portion of the damper blade 3 at the fully open position and restricting the further rotation of the blade 3. .
[0022]
Next, the operation of the above embodiment will be described. 1 and 2 show a state in which the damper blade 3 is in the fully closed position. In this state, the engagement between the projection 4p of the concave / convex engaging means E and the concave part h in the opening adjusting means A is performed by the return spring. The damper blade 3 is securely held at the fully closed position by the engagement.
[0023]
When adjusting the degree of opening of the damper blade 3, the operating member 4 is pushed in by engaging a tool, a coin or the like with an engaging hole 4a at the tip of the operating member 4. Thereby, as shown in FIG. 3, the damper shaft 2 is pushed in the axial direction against the urging force of the return spring S, and the engagement state of the concave / convex engaging means E (the convex portion 4p and the concave portion 5h) is changed. The damper blade 3 is temporarily released, and a desired opening position of the damper blade 3 can be selected and set by rotating the operation member 4 in the released state. After the opening position is set, if the concave / convex engaging means E (the convex portion 4p and the concave portion 5h) is returned to the engaged state again by the urging force of the return spring S, the damper blades are brought to the new set opening. 3 can be reliably held.
[0024]
The new set opening is obtained by the fact that the tip of the projection 4p engaged with the recess 5h corresponding to the set opening appears outside through the opening of the recess 5h. Displayed above.
[0025]
According to the opening adjustment configuration as described above, not only is it very easy to set the adjustment position, but also after the setting, the adjustment position can be securely fixed, which is effective for preventing the adjustment opening from being shifted due to vibration or the like. It is. In addition, the opening position is set by simple concave-convex engagement of the concave-convex engagement means E cooperating with the return spring S, and the setting structure is extremely simple. The cost of maintenance is reduced. Further, in this embodiment, since the operation member 4 is integrated with the damper shaft 2, the number of components is reduced accordingly, and the cost is reduced.
[0026]
Next, a second embodiment of the present invention will be described with reference to FIGS. In this embodiment, a damper shaft 2 'is supported by a damper body 1 so as to be non-slidable and rotatable in the axial direction, and one end 2a of the damper shaft 2' is coaxial with the damper shaft 2 '. 1 extends outward.
[0027]
A shaft-shaped operating member 4 ′ formed separately from the damper shaft 2 ′ and disposed on an extension axis of the damper shaft 2 ′ is provided on a front frame 5 a of the stopper member 5 ′ via a bearing 10. And are slidably fitted and supported in the axial direction. Adjacent ends of the operating member 4 'and the damper shaft 2' (the one end 2a) are fitted to each other so as to be relatively slidable in the axial direction of the damper shaft 2 'and not to be relatively rotatable. In this embodiment, the joint portion is composed of a square shaft portion 2aj provided at one end of the operation member 4 'or the damper shaft 2' and a square tube portion 4j provided at the other end. .
[0028]
The operating member 4 ′ is provided with an engaging piece 6, a locking ring 7 and a seat plate 8 having the same structure and function as in the previous embodiment, and is provided between the seat plate 8 and the base frame 5 b of the stopper member 5. A return spring S is interposed in a compressed state. The operation member 4 'is urged by the elastic force of the return spring S toward the side away from the damper body 1 (i.e., the direction of engagement between the convex portion 4p and the concave portion 5h, which will be described later). The movement limit of the member 4 'is regulated by the engagement between the engagement piece 6 and the front frame 5a (bearing 10).
[0029]
Further, on the operation surface C of the stopper member 5 ', similarly to the previous embodiment, a plurality of recesses 5h formed of through holes, a fully open indication "O" and a fully closed indication "S" are provided.
[0030]
Although not shown, also in this embodiment, the inner peripheral surface of the damper body 1 is engaged with the outer peripheral portion of the damper blade 3 at the fully open position to restrict the further rotation of the blade 3. A stopper protrudes.
[0031]
When adjusting the opening of the damper blade 3, the operating member 4 'is pushed by engaging a tool, a coin or the like into the engaging hole 4a at the tip thereof. As a result, as shown in FIG. 6, the operating member 4 'is pushed in the axial direction against the urging force of the return spring S (at this time, the axial position of the damper shaft 2' is not moved), and the uneven engagement is performed. The engagement state of the means E (the convex portion 4p and the concave portion 5h) is temporarily released, and the desired opening position of the damper blade 3 can be selected and set by rotating the operation member 4 'in the released state. . After the opening position is set, if the concave / convex engaging means E (the convex portion 4p and the concave portion 5h) is returned to the engaged state again by the urging force of the return spring S, the damper blades are brought to the new set opening. 3 can be held.
[0032]
Thus, also in the second embodiment, the same operation and effect as in the first embodiment can be obtained. In particular, in the second embodiment, since the operating member 4 'is formed separately from the damper shaft 2', the degree of freedom in design is increased, and the adjacent end portions of the operating member 4 'and the damper shaft 2' are increased. Since they are fitted to each other so as to be relatively slidable and non-rotatable relative to each other in the axial direction of the damper shaft 2 ', there is an advantage that the interlocking connection between the two can be easily performed.
[0033]
Although the embodiment of the present invention has been described in detail, the present invention is not limited to the above embodiment, and various design changes can be made.
[0034]
For example, in the above-described embodiment, the protrusion 4p and the recess 5h in the concave-convex engagement means E have a structure in which the indicator and the display for displaying the opening degree position of the damper blade 3 are respectively used. In the present invention, the operation members 4 and 4 'and the stopper members 5 and 5' may be provided with dedicated instruction units and display units, respectively.
[0035]
【The invention's effect】
As described above, according to the first aspect of the present invention, the damper shaft can be manually and directly driven to rotate by the operating member coaxial with the damper shaft. Therefore, the number of parts of the damper blade opening adjusting means is reduced. The structure of the adjusting means can be simplified and miniaturized, and facilities such as a power supply and wiring are not required. Therefore, not only can the manufacturing cost be reduced, but also the opening adjusting means can be provided even in a limited space around the damper body. Work space for maintenance, assembling, adjustment, etc. can be sufficiently secured, making work more difficult and improving work efficiency. Also, opening adjustment even when thermal insulation is provided around the damper body There is almost no danger that the means will hinder the construction.
[0036]
In particular, when adjusting the opening, the operating member is pushed or pulled in the axial direction of the damper shaft against the urging force of the return spring, so that the engagement state of the concave-convex engagement means for setting the opening position stepwise is set. After the temporary release, the opening position is set by rotating the operating member in the released state, it is only necessary to return the concave / convex engaging means to the engaged state again by the urging force of the return spring. Not only is the work of setting the adjustment position very easy, but also the setting position can be securely fixed, which is effective in preventing a deviation of the adjustment opening due to vibration or the like. In addition, the opening position is set simply by the concave-convex engagement of the concave-convex engaging means cooperating with the return spring, and the setting structure is simple. Cost can be reduced.
[0037]
According to the second aspect of the present invention, the operating member is formed integrally with the damper shaft and extends to the outside of the damper body, and the operating member is provided between the inner surface of the damper body and the damper blade. Since a gap is provided to allow the axial movement of the damper shaft and the damper blade in conjunction with the pushing or pulling, the cost is reduced by integrating the damper shaft and the operating member. Therefore, the pushing or pulling operation of the operating member is allowed without difficulty.
[0038]
According to the third aspect of the present invention, the operating member is formed separately from the damper shaft and disposed on the extension axis of the damper shaft, and the adjacent ends of the operating member and the damper shaft are connected to each other. The damper shaft is fitted slidably and non-rotatably in the axial direction, so the operating member is separate from the damper shaft, increasing the degree of freedom in design and interlocking the two. The connection can be easily performed by the fitting.
[0039]
According to the fourth aspect of the present invention, the stopper is provided with a display for displaying a plurality of rotational positions of the damper shaft in cooperation with the indicator provided on the operation member, so that the stopper has a simple structure. The opening can be easily and accurately checked.
[Brief description of the drawings]
FIG. 1 is an overall side view of a flow rate adjusting damper device according to a first embodiment. FIG. 2 is a cross-sectional view taken along the line 2-2 of FIG. 1. FIG. 3 is a view corresponding to FIG. 4 is an overall side view of the flow rate adjusting damper device according to the second embodiment. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4. FIG. 6 is a view corresponding to FIG. ]
A, A 'Opening degree adjusting means E Concavo-convex engaging means P Fluid passage S Return spring s ₀ Gap 1 Damper body 2, 2' Damper shaft 3 Damper blade 4, 4 'Operating member 4p Convex part (indicating part)
5, 5 'stopper member 5h recess (display section)

Claims (4)

A damper body (1) having a cylindrical shape and having a fluid passage (P) therein, and a damper shaft (2, 2 ') rotatably supported by the damper body (1) and crossing the fluid passage (P). ), And a damper blade (3) fixed to the damper shaft (2, 2 ') and changing the opening of the fluid passage (P) by integral rotation with the damper shaft (2, 2'). In a flow rate adjusting damper device provided with opening degree adjusting means (A, A ') for manually adjusting the opening degree of the damper blade (3),
The opening adjusting means (A, A ') is provided on a side portion of the damper body (1) so as to be movable by a predetermined amount in the axial direction of the damper shaft (2, 2'), and the damper shaft ( (2, 2 ') and an operating member (4, 4') which is non-rotatably connected to the operating member (4, 4 '). A stopper member (5, 5 ') provided, and a concave portion (5h) and a convex portion provided on one or the other of the stopper member (5, 5') and the operating member (4, 4 '). A concave / convex engaging means (E) having a portion (4p) and capable of selecting and fixing the rotational position of the damper shaft (2, 2 ') in a plurality of steps by engaging the concave portion (5h) and the convex portion (4p). And a return spring (S) for urging the operating member (4, 4 ') in a direction to maintain the engagement between the concave portion (5h) and the convex portion (4p). Equipped with a,
By pushing or pulling the operating member (4, 4 ') in the axial direction of the damper shaft (2, 2') against the urging force of the return spring (S), the concave / convex engaging means (E) A damper device for adjusting a flow rate, wherein the engagement state can be released at any time. The operating member (4) is formed integrally with the damper shaft (2) that is slidably supported on the damper body (1) in the axial direction, and extends outside the damper body (1). Between the inner surface of the damper body (1) and the damper blade (3), the axial direction of the damper shaft (2) and the damper blade (3) interlocked with the pushing or pulling on the operating member (4). wherein the gap allows the movement (s ₀₎ is provided, the flow rate adjusting damper according to claim 1. The operating member (4 ') is formed separately from the damper shaft (2') and is disposed on an extension axis of the damper shaft (2 '), and the operating member (4') and the damper shaft (2 ') are arranged. 2. The flow control according to claim 1, wherein the adjacent ends of the damper shafts are fitted so as to be relatively slidable and non-rotatable in the axial direction of the damper shaft. Damper device. The stopper member (5, 5 ') is provided with a plurality of rotation positions of the damper shaft (2, 2') in cooperation with an indicator (4p) provided on the operation member (4, 4 '). The damper device for adjusting flow rate according to claim 1, 2, or 3, further comprising a display unit (5h) for displaying the pressure.

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