Pull rod mechanism and combustor secondary air limiting device

Abstract

The invention relates to the technical field of combustors, in particular to a pull rod mechanism and a combustor secondary air limiting device.The pull rod mechanism comprises a push-pull component and a pull rod assembly, one end of the pull rod assembly is arranged on an air duct sleeve, and the other end of the pull rod assembly is provided with a control assembly; the measuring part comprises a caliper, a vernier is arranged on the caliper in a sliding mode, and the vernier is fixedly connected to the pull rod assembly; through the arrangement of the sliding block and the guide rail, the movement of the air duct sleeve is guided; the baffle is arranged in cooperation with the first limiting piece and the second limiting piece, so that the moving range of the air duct sleeve is limited; and the dust removal plates are arranged to remove dust in the grooves of the sliding blocks in time, interference and even tight holding caused by dust accumulation between the sliding blocks and the guide rails are avoided, the overall operation of the device is smoother, and the operation safety of the combustor is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of burners, in particular to a pull rod mechanism and a secondary air limiting device for a burner. BACKGROUND

[0002] Secondary air of a burner refers to air that enters a combustion chamber again during the combustion process of the burner. The secondary air provides oxygen for flue gas generated by primary combustion, supports secondary combustion of incomplete combustion products in the flue gas, and thus improves combustion efficiency.

[0003] Through disturbance of the secondary air, combustion is more complete, thereby reducing emission of smoke and dust and ensuring that the emitted smoke and dust meet environmental protection requirements. Meanwhile, after the secondary air enters a hearth, disturbance of air flow is enhanced, backflow of high-temperature flue gas is promoted, and mixing of combustible materials and oxygen is further promoted.

[0004] Therefore, by adjusting the air intake amount of the secondary air, air flow disturbance and mixing effects can be optimized, and combustion efficiency can be further improved.

[0005] In actual production, a pull rod is often used to control a wind channel sleeve. The pull rod reciprocally pushes and pulls the wind channel sleeve, the size of a secondary air inlet on the wind channel is adjusted by movement of the wind channel sleeve, and the air intake amount is adjusted. In long-term operation, the pull rod is often stuck due to internal dust accumulation, cannot be flexibly moved, and even the pull rod is completely stuck. The pull rod has no limiting device, the opening degree of the pull rod for controlling the wind channel sleeve is not convenient to observe, and the opening degree cannot be accurately judged. Since there are many disturbance factors during operation of the burner, it is difficult to adjust and position the pull rod, and there is an adjustment deviation. These conditions result in inconvenience in adjusting the secondary air amount of the burner, affect the wall temperature of a water-cooled wall, are not conducive to stable operation of a unit, and cause great safety hazards. SUMMARY

[0006] In view of the above or the problem that the opening degree of the secondary air inlet of the wind channel is not convenient to quantitatively control in the prior art, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide a pull rod mechanism.

[0008] To solve the above technical problems, the present application provides the following technical solutions: a push-pull component, including a pull rod assembly, one end of the pull rod assembly is arranged on a wind channel sleeve, and the other end of the pull rod assembly is provided with a control assembly; and

[0009] a measuring component, including a caliper, a vernier is slidably arranged on the caliper, and the vernier is fixedly connected to the pull rod assembly.

[0010] As a preferred scheme of the pull rod mechanism of the present application, the pull rod assembly includes a first pull rod, one end of the first pull rod is fixedly connected to the wind channel sleeve through the wall.

[0011] As a preferred scheme of the pull rod mechanism, the pull rod assembly further comprises a pull rod sleeve, the pull rod sleeve is arranged in the wall body and is fixedly connected with the wall body.

[0012] As a preferred scheme of the pull rod mechanism, the first pull rod passes through the pull rod sleeve and can reciprocate along the pull rod sleeve.

[0013] As a preferred scheme of the pull rod mechanism, the pull rod sleeve is provided with a gland at one end close to the wall body, the gland is provided with a dustproof ring, and the first pull rod can reciprocate along the gland and the dustproof ring.

[0014] As a preferred scheme of the pull rod mechanism, the control assembly comprises a hydraulic cylinder, the hydraulic cylinder is provided with a telescopic rod, one end of the telescopic rod is provided with a connecting rod, and the connecting rod is connected with one end of the first pull rod away from the air duct sleeve.

[0015] As a preferred scheme of the pull rod mechanism, the measuring component further comprises a first limiting piece and a second limiting piece, the first limiting piece is fixed to one end of the caliper, and the second limiting piece is fixed to one end of the caliper.

[0016] As a preferred scheme of the pull rod mechanism, the measuring component further comprises a second clasp, the second clasp is fixedly connected to the first pull rod, and the second clasp is provided with a connecting arm between the vernier.

[0017] The pull rod mechanism has the advantages that the first pull rod is more flexible and convenient to push and pull by arranging the hydraulic cylinder, the hydraulic cylinder has a self-holding function, the first pull rod is prevented from being affected by disturbance factors to cause positioning deviation, the air inlet amount is prevented from being deviated, the wall temperature is prevented from being affected, and the overall operation of the burner is prevented from being affected.

[0018] In view of the problems that the pull rod of the secondary air of the burner is inconvenient to guide and the guide component is easy to accumulate dust and hold tightly in actual use.

[0019] To solve the above technical problems, the application further provides the following technical scheme: a secondary air limiting device of a burner, comprising a pull rod mechanism and a guide component, the guide component comprises a guide rail, the guide rail is provided in a convex shape in section, the guide rail is provided with a sliding block, the sliding block is provided in a concave shape, and the guide rail is matched with the sliding block.

[0020] The guide rail is provided with a baffle at two ends, respectively, and the baffle limits the maximum sliding range of the sliding block.

[0021] The sliding block is provided with a second pull rod, and the second pull rod is fixedly connected with the air duct sleeve.

[0022] As a preferred scheme of the secondary air limiting device of the burner, the guide component further comprises a dust removal plate arranged on the guide rail.

[0023] The secondary air limiting device of the burner has the following advantages: the guide rail and the sliding block are arranged to guide the movement of the air duct sleeve; the baffle, the first limiting member and the second limiting member are arranged to limit the movement range of the air duct sleeve; the dust removal plate is arranged to timely remove dust in the groove of the sliding block, avoid interference or even holding between the sliding block and the guide rail due to dust accumulation, and make the device run more smoothly and improve the safety of the burner. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0025] Figure 1 It is a schematic diagram of the whole pull rod mechanism.

[0026] Figure 2 It is a schematic diagram of the whole pull rod mechanism. Figure 1 It is a schematic diagram of the whole pull rod mechanism.

[0027] Figure 3 It is a schematic diagram of the whole pull rod mechanism. Figure 1 It is a schematic diagram of the whole pull rod mechanism.

[0028] Figure 4 It is a schematic diagram of the whole pull rod mechanism. Figure 1 It is a schematic diagram of the whole pull rod mechanism.

[0029] Figure 5 It is a schematic diagram of the whole pull rod mechanism. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings.

[0031] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without departing from the scope of the present application, therefore the present application is not limited to the specific embodiments disclosed below.

[0032] Second, the "one embodiment" or "embodiments" referred to herein are intended to encompass a particular implementation of the present application, which can include a particular feature, structure, or characteristic. However, such a particular implementation can not be the only implementation to encompass the present application. Other implementations of the present application can be similarly explicit without departing from the present application.

[0033] Embodiment 1, Reference Figures 1 to 4 As a first embodiment of the present application, the embodiment provides a pull rod mechanism, which can automatically push and pull the air duct sleeve and keep the air duct sleeve in a predetermined position.

[0034] The push-pull component 100 includes a pull rod assembly 101, one end of which is arranged on the air duct sleeve M, and the pull rod assembly 101 is used to push and pull the air duct sleeve M. The other end of the pull rod assembly 101 is provided with a control assembly 102 to provide the pull rod assembly 101 with a pushing and pulling force and a retaining force to keep it in a predetermined position.

[0035] Specifically, the pull rod assembly 101 includes a first pull rod 101b, which passes through the wall K outside the combustion chamber where the burner is placed, extends into the combustion chamber, and is welded to the air duct sleeve M at one end inside the combustion chamber.

[0036] Further, the pull rod assembly 101 also includes a pull rod sleeve 101a, which is arranged in the wall K and is bolted to the wall K.

[0037] The first pull rod 101b passes through the pull rod sleeve 101a and reciprocally slides along the pull rod sleeve 101a.

[0038] Preferably, the pull rod sleeve 101a is provided with a gland 101c at one end close to the wall K, and a dust seal 101d is installed in the gland 101c. The first pull rod 101b can reciprocally slide along the gland 101c and the dust seal 101d. The gland 101c is used to fixedly connect the dust seal 101d to the pull rod sleeve 101a. The inner diameter of the dust seal 101d is 1:1 with the outer diameter of the first pull rod 101b, so as to prevent dust from entering the pull rod sleeve 101a through the gap between the first pull rod 101b and the pull rod sleeve 101a, causing the first pull rod 101b to jam in the pull rod sleeve 101a, or even completely stuck.

[0039] Further, the control assembly 102 comprises a hydraulic cylinder 102a, the hydraulic cylinder 102a is provided with a telescopic rod 102b, a first clasp 102c is welded at the end of the telescopic rod 102b, the first clasp 102c is sleeved on a connecting rod 102d and locked by bolts, and the connecting rod 102d is vertically arranged with the telescopic rod 102b; the first pull rod 101b is welded and fixed on the connecting rod 102d, so that when the first pull rod 101b is provided with two or more, the first pull rods 101b can be simultaneously welded and fixed on the connecting rod 102d and synchronously moved with the connecting rod 102d.

[0040] It should be explained that in the embodiment, the first pull rod 101b is preferably provided with two, which are symmetrically arranged on both sides of the air duct sleeve M, so that the air duct sleeve M is balanced in force, and the connecting rod 102d is arranged to facilitate the telescopic rod 102b to control two first pull rods 101b at the same time.

[0041] In use, if it is necessary to increase the secondary air inlet amount of the burner, the hydraulic cylinder 102a is opened, the telescopic rod 102b is retracted, the first pull rod 101b drives the air duct sleeve M to move away from the air duct N, the area of the secondary air inlet L originally covered by the air duct sleeve M is gradually increased, the air inlet area of the secondary air inlet L is increased, and the secondary air inlet amount is increased.

[0042] In summary, the arrangement of the hydraulic cylinder 102a makes the push-pull movement of the first pull rod 101b more flexible and convenient, and the hydraulic cylinder 102a has a self-holding function, which avoids the positioning deviation of the first pull rod 101b caused by disturbance factors, causes the deviation of the air inlet amount, and affects the wall temperature, thereby affecting the overall operation of the burner.

[0043] Embodiment 2, refer to Figures 2-3 The second embodiment of the present application is different from the previous embodiment, which provides a measuring component of the pull rod mechanism, and solves the problem that the push-pull distance of the pull rod mechanism is not convenient to quantify.

[0044] The measuring component 200 comprises a caliper 201 made of a stainless steel pipe, the surface of the stainless steel pipe is brushed with scale lines, in the embodiment, the scale lines are brushed as 0, 25, 50, 75 and 100, the unit is mm, 0 is the full-closed position of the secondary air inlet L, and 100 is the full-open position of the secondary air inlet L; the caliper 201 is arranged in parallel to the first pull rod 101b, and the end away from the hydraulic cylinder 102a is bolted and fixed to the wall K.

[0045] Further, the caliper 201 is provided with a vernier 204 made of a clasp, the vernier 204 is slidably sleeved on the caliper 201, the push-pull distance of the first pull rod 101b is directly obtained through the change of the position of the vernier 204, and then the exposure or closing amount of the secondary air inlet L is obtained.

[0046] And, the first limiting member 202 is fixed to one end of the caliper 201, in this embodiment, to the 0 point end; the second limiting member 203 is fixed to one end of the caliper 201, in this embodiment, to the end of the number 100; the first limiting member 202 and the second limiting member 203 are used to limit the moving range of the cursor 204 on the caliper 201, and further limit the moving range of the air duct sleeve M.

[0047] The first limiting member 202 is made of a snap ring, which is sleeved at the 0 point of the caliper 201 and locked by a bolt; the second limiting member 203 is made of a snap ring, which is sleeved at the end of the number 100 of the caliper 201 and locked by a bolt.

[0048] The measuring component 200 further comprises a second snap ring 205, which is sleeved on the first pull rod 101b and locked on the first pull rod 101b by a bolt, and a connecting arm 206 is welded on the opposite side of the cursor 204, and the other end of the connecting arm 206 is welded on the cursor 204.

[0049] The connecting arm 206 is made of a steel pipe, and the connecting arm 206 is arranged to facilitate the second snap ring 205 to slide the cursor 204 on the caliper 201 when the second snap ring 205 moves with the first pull rod 101b, so as to display the moving distance of the first pull rod 101b.

[0050] It should be noted that initially the cursor 204 can be placed at the midpoint of the caliper 201, and the first pull rod 101b is kept at the middle position of the push-pull distance, that is, the first pull rod 101b is at the position where the forward pushing amount and the backward pulling amount are equivalent; at this time, the exposed area of the secondary air inlet L is 1 / 2 of the total area; the arrangement of the above position facilitates the rapid adjustment of the exposed area of the secondary air inlet L, and reduces the reciprocating movement of the first pull rod 101b.

[0051] The remaining structures are the same as those of embodiment 1.

[0052] In use, if it is necessary to increase the secondary air intake of the burner, the hydraulic cylinder 102a is opened, the telescopic rod 102b is retracted, so that the first pull rod 101b drives the air duct sleeve M to move away from the air duct N, and the first pull rod 101b moves at the same time, the cursor 204 moves on the caliper 201, according to the preset relationship between the exposed area of the secondary air inlet L and the air intake, and the corresponding relationship between the exposed area of the secondary air inlet L and the caliper reading, when the cursor 204 moves to the corresponding position, the movement of the first pull rod 101b is stopped, the telescopic rod 102b keeps the same length to keep the first pull rod 101b at the required position, so as to ensure the constant secondary air intake.

[0053] If the secondary air intake of the burner needs to be reduced, the hydraulic cylinder 102a is opened, and the telescopic rod 102b is elongated.

[0054] In summary, the setting of the measuring part makes the secondary air intake of the burner easy to observe, and the quantitative control of the air intake is achieved.

[0055] Embodiment 3, refer to Figure 4 and Figure 5 The third embodiment of the present application is different from the previous embodiment in that it provides a secondary air limiting device for the burner, which solves the problems of inconvenient guiding of the secondary air rod of the burner and easy dust accumulation of the guiding part, and comprises the rod mechanism in the above embodiment.

[0056] Further, the two ends of the guide rail 301 are respectively provided with baffles 303, which limit the maximum sliding range of the sliding block 302, which can not only prevent the sliding block 302 from sliding off at both ends of the guide rail 301, but also assist in limiting the movement range of the air duct sleeve M.

[0057] Further, the two ends of the guide rail 301 are respectively provided with baffles 303, which limit the maximum sliding range of the sliding block 302, which can not only prevent the sliding block 302 from sliding off at both ends of the guide rail 301, but also assist in limiting the movement range of the air duct sleeve M.

[0058] The second rod 304 is provided on the sliding block 302, and the second rod 304 is fixedly connected with the air duct sleeve M. When the air duct sleeve M moves under the drive of the first rod 101b, the air duct sleeve M moves the sliding block 302 through the second rod 304, and the sliding block 302 moves along the guide rail 301, which provides a guiding effect for the movement of the air duct sleeve M.

[0059] Preferably, the guiding part 300 further comprises a dust removal plate 305, which is bonded or bolted to the guide rail 301. The dust removal plate 305 is laid on the middle position of the guide rail 301, and the thickness is equivalent to the gap between the sliding block 302 and the guide rail 301, and the laying length is equivalent to 1 / 10 of the length of the sliding block 302; when the sliding block 302 reciprocates along the guide rail 301, the grooves of the sliding block 302 will rub against the dust removal plate 305, and the dust removal plate 305 will scrape off the dust in the grooves of the sliding block 302, avoiding interference or even holding between the sliding block 302 and the guide rail 301 due to dust accumulation.

[0060] Specifically, the dust removal plate 305 is made of wear-resistant metal plate.

[0061] The remaining structures are the same as those of embodiment 2.

[0062] In summary, through the setting of the sliding block 302 and the guide rail 301, the movement of the air duct sleeve M is guided; the setting of the baffle 303 and the setting of the first limiting piece 202 and the second limiting piece 203 cooperate with each other to limit the movement range of the air duct sleeve M; the setting of the dust removal plate 305 timely removes the dust in the groove of the sliding block 302, avoids the interference or even holding of the sliding block 302 and the guide rail 301 due to dust accumulation, and makes the overall operation of the device smoother, thereby improving the safety of the operation of the burner.

[0063] Importantly, it should be noted that the constructions and arrangements of the present application shown in the various exemplary embodiments are merely illustrative. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, etc.) without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be altered or varied. Accordingly, all such modifications are intended to be included within the scope of the present application. The order or sequence of any process or method steps can be varied or re-sequenced without materially affecting the application. Any "means plus function" clauses are intended to cover the structures described herein as performing the recited functionality and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present application. Accordingly, the present application is not limited to the particular embodiments described but extends to the scope of the appended claims.

[0064] Furthermore, in the interest of providing a concise description of exemplary embodiments, not all features of an actual implementation can be described (i.e., those unrelated to the best mode of practicing the present application, or those unrelated to any implementation essentially pointed out in the disclosure).

[0065] It is to be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions can be made. Such development efforts can inevitably lead to a number of substitutions, modifications, changes, and omissions of features not specifically shown and / or described. Similarly, it will be appreciated that some of the features of the application described herein can be selectively implemented depending on the implementation. For example, one or more of these features may

[0066] It should be noted that the above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A pull rod mechanism, characterized in that: include, A push-pull component (100) comprises a pull rod assembly (101), one end of the pull rod assembly (101) is arranged on the air duct sleeve (M), and the other end is provided with a control assembly (102); and, The measuring component (200) comprises a caliper (201), a cursor (204) being slidably provided on the caliper (201), and the cursor (204) being fixedly connected to the pull rod assembly (101).

2. The pull rod mechanism according to claim 1, wherein: The pull rod assembly (101) comprises a first pull rod (101b), one end of the first pull rod (101b) passing through the wall (K) and fixedly connected to the air duct sleeve (M).

3. The pull rod mechanism according to claim 2, wherein: The pull rod assembly (101) further comprises a pull rod sleeve (101a), wherein the pull rod sleeve (101a) is passed through the wall (K) and is fixedly connected to the wall (K).

4. The pull rod mechanism according to claim 3, wherein: The first pull rod (101b) passes through the pull rod sleeve (101a) and can slide back and forth along the pull rod sleeve (101a).

5. The pull rod mechanism according to claim 4, wherein: A pressure cover (101c) is provided at one end of the pull rod sleeve (101a) close to the wall (K), a dust ring (101d) is provided inside the pressure cover (101c), and the first pull rod (101b) can slide back and forth along the pressure cover (101c) and the dust ring (101d) at the same time.

6. The pull rod mechanism according to claim 1, wherein: The control assembly (102) includes a hydraulic cylinder (102a), the hydraulic cylinder (102a) is provided with a telescopic rod (102b), one end of the telescopic rod (102b) is provided with a connecting rod (102d), and the connecting rod (102d) is connected to the end of the first pull rod (101b) away from the air duct sleeve (M).

7. The pull rod mechanism according to claim 6, wherein: The measuring component (200) further comprises a first position-limiting member (202) and a second position-limiting member (203), wherein the first position-limiting member (202) is fixed to one end of the caliper (201), and the second position-limiting member (203) is fixed to one end of the caliper (201).

8. The pull rod mechanism according to claim 7, wherein: The measuring component (200) further comprises a second snap ring (205), wherein the second snap ring (205) is fixedly connected to the first pull rod (101b), and a connecting arm (206) is provided between the second snap ring (205) and the cursor (204).

9. A burner secondary air limiting device, characterized by: comprising the pull rod mechanism according to any one of claims 1 to 8, and The guide component (300) includes a guide rail (301), wherein the guide rail (301) has a convex cross-section, a slider (302) is provided on the guide rail (301), and the slider (302) is concave, and the guide rail (301) and the slider (302) are adapted to each other; Wherein, baffles (303) are respectively provided at both ends of the guide rail (301), and the baffles (303) limit the maximum sliding range of the slider (302); The slider (302) is provided with a second pull rod (304), and the second pull rod (304) is fixedly connected to the air duct sleeve (M).

10. The burner secondary air limiting device according to claim 9, characterized in that: The guide component (300) further includes a dust removal plate (305), and the dust removal plate (305) is arranged on the guide rail (301).

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