Double-core shrinkage-hole-adjustable pulverized coal pipeline

Abstract

The utility model provides a double-core shrinkage-hole-adjustable pulverized coal pipeline which comprises a pulverized coal pipeline body, a left shrinkage-hole door plate, a right shrinkage-hole door plate and a front sealing plate, and a pipeline box is arranged at the lower end of an internal component of the pulverized coal pipeline body. The pulverized coal pipeline has the advantages that the pulverized coal pipeline body, the left shrinkage cavity door plate, the right shrinkage cavity door plate, the front sealing plate, the driving shaft, the driving bevel gear and the shrinkage cavity screw are additionally arranged, and the driving shaft rotates to drive the shrinkage cavity screw to rotate through the driving bevel gear; the left shrinkage cavity door plate and the right shrinkage cavity door plate are driven to be close to or away from each other under cooperation of the shrinkage cavity external threads and the shrinkage cavity screw holes, opening control is conducted on the pipeline body, the left shrinkage cavity door plate and the right shrinkage cavity door plate are attached to enable the sealing embedded block to be embedded into the sealing embedded groove, a sealing ring is installed at the joint, and the front sealing plate can be embedded into the front sealing groove to achieve complete blocking. The pulverized coal flow control accuracy can be improved, and pulverized coal can be conveniently cleaned by additionally arranging the pulverized coal pipeline body.

Description

Technical Field

[0001] The utility model belongs to the technical field of pulverized coal pipelines, in particular to a pulverized coal pipeline with double cores and adjustable shrinkage holes. Background Art

[0002] The pulverized coal pipeline is a key component used to transport pulverized coal from the pulverizer to the burner in a coal-fired power plant. The application of the dual-core adjustable shrinkage hole in the pulverized coal pipeline is mainly to achieve precise control of the pulverized coal flow rate. However, the dual-core adjustable shrinkage hole in the common pulverized coal pipeline has insufficient sealing effect at the connection after the shrinkage hole door plate is fully closed, resulting in pulverized coal leaking from the gap, thereby affecting the precise control of the pulverized coal flow rate. Most pulverized coal pipelines still have through holes in the center part even when the shrinkage hole door plate is fully closed. The dual-core adjustable shrinkage hole structure cannot completely block the pulverized coal pipeline, and other components need to be added at the rear to achieve the effect of pulverized coal cutting off. This results in pulverized coal between the shrinkage hole door plate and the subsequent cutting off structure, which affects the control of the pulverized coal flow rate.

[0003] In summary, the double-core adjustable shrinkage structure of the pulverized coal pipeline has some problems in use due to insufficient sealing, so it is hoped to propose a new structure to solve the above technical problems. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a double-core pulverized coal pipeline with adjustable shrinkage holes to solve the problems raised in the above background technology.

[0005] The utility model is realized through the following technical solutions: a double-core adjustable shrinkage hole coal powder pipeline, comprising: a coal powder pipeline main body, a left shrinkage hole door panel, a right shrinkage hole door panel and a front sealing plate, the lower end of the internal composition of the coal powder pipeline main body is provided with a pipeline box, the middle position of the inner side of the pipeline box passes through the pipeline body, the left and right side surfaces of the pipeline body are provided with door panel grooves, the inner side of the door panel groove at the left end is provided with a left shrinkage hole door panel for shrinkage hole use, the inner side of the door panel groove at the right end is provided with a right shrinkage hole door panel, the front sides of the left shrinkage hole door panel and the right shrinkage hole door panel are both provided with a front sealing plate for sealing, an upper seat plate is provided above the pipeline box, a rotating hole is provided at the left end of the upper surface of the upper seat plate, a bearing is installed on the inner side of the rotating hole, a driving shaft is provided inside the bearing, a driving bevel gear is provided at the lower end of the driving shaft, and a shrinkage screw is provided on the right side of the driving bevel gear.

[0006] As a preferred embodiment, the left end of the internal component of the shrinkage screw is provided with a driven bevel gear, the driving bevel gear and the driven bevel gear are engaged with each other, a screw body is provided on the right side of the driven bevel gear, and the left and right ends of the outer side of the screw body are provided with shrinkage external threads, which can drive the driven bevel gear to rotate through the engagement of the driving bevel gear and the driven bevel gear.

[0007] As a preferred embodiment, the upper ends of the internal components of the left shrinkage hole door panel and the right shrinkage hole door panel are both provided with shrinkage hole sliders, the left side of the shrinkage hole slider is vertically penetrated to form a shrinkage hole screw hole, and the upper end of the pipe body is provided with a shrinkage hole slide groove.

[0008] As a preferred embodiment, the shrinkage hole slider and the shrinkage hole slide groove are movably engaged with each other, the left and right groups of shrinkage hole external threads have opposite rotation directions and are threadedly connected with the shrinkage hole screw holes at both ends, and a door panel body is provided under the shrinkage hole slider. A front sealing groove is provided on the front side of the door panel body, which can achieve close and far control by making the shrinkage hole external thread and the shrinkage hole screw hole cooperate with each other.

[0009] As a preferred embodiment, the left door panel body has sealing grooves at both upper and lower ends on its right side, and the right door panel body has sealing inserts at both upper and lower ends on its left side, with sealing rings installed on the outer sides of the sealing inserts.

[0010] The sealing insert and the sealing groove are engaged with each other and the sealing ring is extruded and installed. The upper surface of the upper seat plate is provided with an upper groove. The front sealing plate passes through the upper groove and is engaged with the front sealing groove. The sealing insert and the sealing groove are engaged with each other, and a sealing ring is installed at the engagement position, so that the sealing performance after closing can be improved.

[0011] As a preferred embodiment, a cleaning pipe groove is provided on the upper end of the left side of the pipe box, a cleaning pipe is installed on the upper end of the cleaning pipe groove, and a plurality of cleaning holes are provided on the lower end of the outer side of the cleaning pipe in linear equal distribution.

[0012] As a preferred embodiment, the left end of the cleaning tube is connected to an external air pipe, and a sealing strip is installed at the lower end of the inner side of the cleaning tube groove. The upper side of the sealing strip fits with the lower end of the outer side of the cleaning tube, and the cleaning tube groove and the door panel groove are connected to each other. The user can introduce gas into the inner side of the cleaning tube through the external air pipe, so that the gas is discharged through the cleaning hole to clean the shrinkage screw.

[0013] After adopting the above technical scheme, the beneficial effects of the utility model are as follows: by adding the coal powder pipeline main body, the left shrinkage hole door plate, the right shrinkage hole door plate, the front sealing plate, the driving shaft, the driving bevel gear and the shrinkage hole screw, the driving shaft rotates through the driving bevel gear to drive the shrinkage hole screw to rotate, so that the shrinkage hole external thread and the shrinkage hole screw hole cooperate to drive the left shrinkage hole door plate and the right shrinkage hole door plate to approach or move away, thereby controlling the opening of the pipeline main body, the left shrinkage hole door plate and the right shrinkage hole door plate are fitted so that the sealing block is embedded in the sealing groove, and a sealing ring is installed at the connection, and the front sealing plate can be embedded in the front sealing groove to achieve complete blocking, which can improve the accuracy of coal powder flow control, and by adding the coal powder pipeline main body, it is convenient to clean the coal powder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0015] Figure 1 The utility model is a schematic diagram of the overall structure of a double-core pulverized coal pipeline with adjustable shrinkage holes.

[0016] Figure 2 The utility model is a structural schematic diagram of a driving shaft, a driving bevel gear and a shrinkage screw in a double-core adjustable shrinkage pore coal pulverized pipeline.

[0017] Figure 3 This is a schematic diagram of the upper structure of a pulverized coal pipeline body in a double-core pulverized coal pipeline with adjustable shrinkage holes according to the present invention.

[0018] Figure 4 This is a schematic diagram of the lower structure of a pulverized coal pipeline body in a double-core pulverized coal pipeline with adjustable shrinkage holes according to the present invention.

[0019] Figure 5 The utility model is a structural schematic diagram of a left shrinkage hole door plate in a double-core adjustable shrinkage hole coal pulverized pipeline.

[0020] In the figure, 100-coal powder pipeline body, 101-pipe box, 102-upper seat plate, 103-upper embedded groove, 104-rotating hole, 105-pipe body, 106-door plate groove, 107-cleaning pipe, 108-cleaning pipe groove, 109-cleaning hole;

[0021] 200-left shrinkage hole door panel, 201-shrinkage hole slider, 202-shrinkage hole screw hole, 203-door panel body, 204-sealing groove, 205-front sealing groove;

[0022] 300-right shrinkage door panel;

[0023] 400-front cover;

[0024] 500-driving shaft;

[0025] 600-driving bevel gear;

[0026] 700-shrinkage screw;

[0027] 800-Sealing strip. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] See also Figures 1 to 5 The utility model provides a technical solution: a double-core adjustable shrinkage pore pulverized coal pipeline, comprising: a pulverized coal pipeline body 100, a left shrinkage pore door plate 200, a right shrinkage pore door plate 300 and a front sealing plate 400. The pulverized coal pipeline body 100 has a pipeline box 101 at the lower end thereof;

[0030] A pipe body 105 is passed through the middle of the inner side of the pipe box 101. Door plate grooves 106 are provided on both the left and right sides of the pipe body 105. A left shrinkage hole door plate 200 for shrinkage hole use is provided inside the left door plate groove 106, and a right shrinkage hole door plate 300 is provided inside the right door plate groove 106.

[0031] The front sides of the left shrinkage hole door panel 200 and the right shrinkage hole door panel 300 are both provided with front sealing plates 400 for sealing. An upper seat plate 102 is provided above the pipe box 101. A rotating hole 104 is opened at the left end of the upper surface of the upper seat plate 102. A bearing is installed inside the rotating hole 104. A driving shaft 500 is provided inside the bearing. A driving bevel gear 600 is provided at the lower end of the driving shaft 500. A shrinkage hole screw 700 is provided on the right side of the driving bevel gear 600.

[0032] The left end of the shrinkage screw 700 is provided with a driven bevel gear in its internal composition, and the driving bevel gear 600 and the driven bevel gear are meshed with each other. A screw body is provided on the right side of the driven bevel gear, and shrinkage external threads are provided on the left and right ends of the outer side of the screw body. The driving bevel gear 600 can drive the driven bevel gear to rotate through the meshing of the driving bevel gear 600 and the driven bevel gear.

[0033] The left shrinkage hole door panel 200 and the right shrinkage hole door panel 300 are both provided with a shrinkage hole slider 201 at the upper end of their internal components. The shrinkage hole slider 201 vertically penetrates the left side to form a shrinkage hole screw hole 202, and a shrinkage hole slide groove is opened at the upper end of the pipe body 105.

[0034] The shrinkage hole slider 201 and the shrinkage hole slide groove are movably engaged with each other, and the left and right sets of shrinkage hole external threads rotate in opposite directions and are threadedly connected with the shrinkage hole screw holes 202 at both ends. A door panel body 203 is provided under the shrinkage hole slider 201, and a front sealing groove 205 is provided on the front side of the door panel body 203. Through the cooperation of the shrinkage hole external thread and the shrinkage hole screw hole 202, the shrinkage hole screw 700 can drive the left shrinkage hole door panel 200 and the right shrinkage hole door panel 300 to achieve close and far control.

[0035] The left door panel body 203 has sealing grooves 204 at both ends of the right side, and sealing blocks at both ends of the left side. Sealing rings are installed on the outer sides of the sealing blocks.

[0036] The sealing block and the sealing groove 204 are engaged with each other and the sealing ring is extruded and installed. An upper groove 103 is provided on the upper surface of the upper seat plate 102. The front sealing plate 400 passes through the upper groove 103 and is engaged with the front sealing groove 205. The sealing block and the sealing groove 204 are engaged with each other, and a sealing ring is installed at the engaging position, which can improve the sealing performance after closing.

[0037] See also Figure 1-Figure 5 As the first embodiment of the present utility model: first, the user can rotate the driving shaft 500 to drive the driving bevel gear 600, and the engagement of the driving bevel gear 600 with the driven bevel gear can make the driving bevel gear 600 drive the driven bevel gear to rotate, thereby driving the shrinkage screw 700 to rotate, and the shrinkage screw 700 can drive the left shrinkage door plate 200 and the right shrinkage door plate 300 to achieve approach and distance control through the cooperation of the shrinkage external thread and the shrinkage screw hole 202, thereby controlling the internal opening of the pipeline body 105. Secondly, when the left shrinkage door plate 200 and the right shrinkage door plate 300 are completely closed, the sealing block and the sealing embedding groove 204 can be embedded, and a sealing ring is installed at the embedding position to improve the sealing after closing, and the user can pass the front sealing plate 400 through the upper embedding groove 103 and embed it with the front sealing groove 205 to achieve complete blocking of the opening of the pipeline body 105, thereby improving the accuracy of coal powder flow control.

[0038] A cleaning pipe groove 108 is provided at the upper end of the left side of the pipe box 101 , a cleaning pipe 107 is installed at the upper end of the cleaning pipe groove 108 , and a plurality of cleaning holes 109 are provided at the lower end of the outer side of the cleaning pipe 107 in a linearly equally distributed manner.

[0039] The left end of the cleaning tube 107 is connected to the external air pipe, and a sealing strip 800 is installed at the lower inner end of the cleaning tube groove 108. The upper side of the sealing strip 800 fits with the lower outer end of the cleaning tube 107. The cleaning tube groove 108 and the door panel groove 106 are interconnected. The user can introduce gas into the inside of the cleaning tube 107 through the external air pipe, so that the gas is discharged through the cleaning hole 109 to clean the shrinkage screw 700.

[0040] See also Figure 1 -and Figure 3-Figure 4As the second embodiment of the present utility model: Based on the above-mentioned first embodiment, the shrinkage screw 700 will come into direct contact with coal powder during use, and its performance will be reduced under long-term action. The user can pull out the sealing strip 800 and introduce gas into the inner side of the cleaning tube 107 through the external air pipe, so that the gas is discharged through the cleaning hole 109 to clean the shrinkage screw 700, remove the coal powder on the outer side of the shrinkage screw 700, and improve the performance of the shrinkage screw 700. After cleaning, the sealing strip 800 can be embedded in the inner side of the cleaning tube groove 108 to prevent the entry of coal powder.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A double-core pulverized coal pipeline with adjustable shrinkage, comprising: A pulverized coal pipeline body (100), a left shrinkage hole door plate (200), a right shrinkage hole door plate (300), and a front sealing plate (400), characterized in that: the pulverized coal pipeline body (100) is provided with a pipeline box (101) at the lower end of its internal components; A pipe body (105) is passed through the middle of the inner side of the pipe box (101), and door plate grooves (106) are provided on both the left and right sides of the pipe body (105). A left shrinkage hole door plate (200) for shrinkage holes is provided inside the left door plate groove (106), and a right shrinkage hole door plate (300) is provided inside the right door plate groove (106). The front sides of the left shrinkage hole door panel (200) and the right shrinkage hole door panel (300) are both provided with front sealing plates (400) for sealing. An upper base plate (102) is provided above the pipe box (101). A rotating hole (104) is provided at the left end of the upper surface of the upper base plate (102). A bearing is installed inside the rotating hole (104). A driving shaft (500) is provided inside the bearing. A driving bevel gear (600) is provided at the lower end of the driving shaft (500). A shrinkage hole screw (700) is provided on the right side of the driving bevel gear (600).

2. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 1, characterized in that: The shrinkage screw (700) has a driven bevel gear provided at its left end, the driving bevel gear (600) meshes with the driven bevel gear, a screw body is provided on the right side of the driven bevel gear, and shrinkage external threads are provided at both left and right ends of the outer side of the screw body.

3. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 2, characterized in that: The left shrinkage hole door panel (200) and the right shrinkage hole door panel (300) are both provided with a shrinkage hole slider (201) at their upper ends in their internal components. A shrinkage hole screw hole (202) is vertically penetrated through the left side of the shrinkage hole slider (201). A shrinkage hole slide groove is provided at the upper end of the pipe body (105).

4. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 3, characterized in that: The shrinkage hole slider (201) and the shrinkage hole slide groove are movably engaged with each other, the left and right groups of shrinkage hole external threads are screwed in opposite directions and are threadedly connected to the shrinkage hole screw holes (202) at both ends, a door panel body (203) is provided below the shrinkage hole slider (201), and a front sealing groove (205) is provided on the front side of the door panel body (203).

5. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 4, characterized in that: The left door panel body (203) is provided with sealing grooves (204) at both upper and lower ends of the right side surface, and the right door panel body (203) is provided with sealing inserts at both upper and lower ends of the left side surface, and the outer side of the sealing insert is provided with a sealing ring; The sealing insert and the sealing embedding groove (204) are interlocked and the sealing ring is extruded and installed. The upper surface of the upper seat plate (102) is provided with an upper embedding groove (103). The front sealing plate (400) passes through the upper embedding groove (103) and is interlocked with the front sealing groove (205).

6. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 1, characterized in that: A cleaning pipe groove (108) is provided at the upper end of the left side surface of the pipe box (101), a cleaning pipe (107) is installed at the upper end of the cleaning pipe groove (108), and a plurality of cleaning holes (109) are provided at the lower end of the outer side surface of the cleaning pipe (107) and are linearly and evenly distributed.

7. The double-core pulverized coal pipeline with adjustable shrinkage holes according to claim 6, characterized in that: The left end of the cleaning pipe (107) is connected to an external air pipe, and a sealing strip (800) is installed at the lower end of the inner side of the cleaning pipe groove (108). The upper side of the sealing strip (800) is in contact with the lower end of the outer side of the cleaning pipe (107), and the cleaning pipe groove (108) is connected to the door panel groove (106).

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