Coal overflow protection device for coal drop pipe

Abstract

The invention discloses a coal falling pipe coal overflow protection device, and relates to the technical field of coal falling pipe coal overflow protection, the coal falling pipe coal overflow protection device comprises a coal receiving assembly, the coal receiving assembly comprises a coal receiving box, the coal receiving box is arranged on one side of a belt coal conveyer under a coal falling pipe, and the coal receiving box is provided with a coal receiving groove with a top opening and is used for receiving coal falling pipe coal overflow; the suspension assembly comprises a pull rope, a static pulley and a pulley support. On the basis that an original mechanical material blocking switch is reserved, the additional coal overflow protection device is provided, through mutual cooperation of the coal receiving assembly and the hanging assembly, when coal in the coal falling pipe rises and overflows, overflowing coal briquettes can be received in time through the coal receiving assembly, and under the action of gravity, the coal is prevented from overflowing. The emergency stop switch of the belt coal conveyer is rapidly pulled through the pull rope in the suspension assembly, so that the belt stops running, coal briquette accumulation and further coal overflow are avoided, and the emergency stop device can be used as the last defense line to prevent coal overflow accidents under the condition that a mechanical material blocking switch fails.

Description

Technical Field

[0001] The invention relates to the technical field of coal drop pipe coal overflow protection, and in particular to a coal drop pipe coal overflow protection device. Background Art

[0002] During the operation of fuel transportation and coal unloading in power plants, coal overflow from the coal pipe at the head of the coal conveyor belt often occurs. This problem is usually caused by factors such as changes in coal quality. At present, the mechanical blocking switch installed in the coal pipe is the main means of detecting coal overflow. The working principle of the switch is: when the amount of coal in the coal pipe increases and squeezes the switch, the vertically suspended switch deviates from the vertical position by more than 25 degrees due to external force, triggering the internal contact action, causing the belt conveyor control circuit to be disconnected, thereby stopping the belt. However, the existing technology has the following limitations:

[0003] Single-sided installation of the blockage switch: The blockage switch is only installed on one side of the coal drop pipe, resulting in the inability to detect coal accumulation starting from the other side, which may eventually overflow and the blockage switch cannot provide protection.

[0004] Angle detection limitation: When coal gradually accumulates in the coal drop pipe and hits the blocking switch, due to the coal accumulation on both sides of the blocking switch, the angle of the switch deviating from the vertical position is insufficient and the protection action cannot be triggered.

[0005] These limitations result in the existing blocking switches being unable to effectively prevent coal spillage in some cases, which may cause the entire coal handling system to shut down for a long time, seriously affecting production operations. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the problem that the above-mentioned existing mechanical blocking switch may not be able to detect coal overflow in time, thereby causing the entire coal transportation and unloading system to be shut down for a long time and seriously affecting production operation, the present invention is proposed.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: a coal overflow protection device for a coal drop pipe, comprising: a coal receiving assembly, which includes a coal receiving box, and the coal receiving box is arranged on the side of the belt coal conveyor directly below the coal drop pipe, and the coal receiving box is provided with a coal receiving trough with a top opening for receiving coal overflow from the coal drop pipe; a suspension assembly, which includes a pull rope, a static pulley, and a pulley bracket; wherein one end of the pulley bracket is fixedly connected to a side shell of the belt coal conveyor, and the static pulley is movably installed on the pulley bracket, one end of the pull rope passes through the static pulley and is connected to the emergency stop switch of the belt coal conveyor, and the other end of the pull rope is connected to the coal receiving assembly, and is used to suspend the coal receiving assembly in mid-air.

[0009] As a preferred solution of the coal overflow protection device for the coal drop pipe of the present invention, the coal receiving box is a columnar box body with a bottom surface that is a regular polygonal or circular shape.

[0010] As a preferred solution of the coal overflow protection device for the coal drop pipe of the present invention, the coal collecting chute includes a columnar section and a conical section, the columnar section is arranged axially along the coal receiving box and one end away from the conical section is the coal receiving box opening.

[0011] As a preferred solution of the coal spill protection device for the coal drop pipe of the present invention, one end of the pull rope is tied to the bottom center of the coal collecting chute.

[0012] As a preferred solution of the coal overflow protection device for the coal drop pipe of the present invention, the coal receiving assembly also includes a spring telescopic rod arranged on the top of the coal receiving box, the spring telescopic rod is evenly distributed along the outer circumference of the coal receiving box, and one end of the spring telescopic rod is hinged to the coal receiving box.

[0013] As a preferred solution of the coal overflow protection device for the coal drop pipe of the present invention, the coal receiving assembly further comprises a suspension ring and a connecting rope fastened to the suspension ring, the number of the connecting ropes is the same as the number of the spring telescopic rods, and the end of the connecting rope away from the suspension ring is fastened to the movable end of the adjacent spring telescopic rod.

[0014] As a preferred solution of the coal overflow protection device for the coal drop pipe of the present invention, wherein: a hanging sleeve is provided at one end of the connecting rope away from the suspension ring, and a hanging groove is provided at the movable end of the spring telescopic rod; the hanging sleeve can be sleeved on the hanging groove of the spring telescopic rod to tighten the connecting rope.

[0015] As a preferred solution of the coal spill protection device for a coal drop pipe of the present invention, one end of the pull rope is tied to the suspension ring.

[0016] As a preferred solution of the coal spill protection device for a coal drop pipe of the present invention, the pull rope is a flexible steel wire rope.

[0017] As a preferred solution of the coal spill protection device for a coal drop pipe of the present invention, a rope buckle is provided on the connecting rope for adjusting the length of the connecting rope.

[0018] Beneficial effects of the present invention: on the basis of retaining the original mechanical blocking switch, the present invention provides an additional coal overflow protection device; through the cooperation between the coal receiving assembly and the suspension assembly, when the amount of coal in the coal drop pipe increases and overflows, the coal receiving assembly can promptly receive the overflowed coal blocks, and under the action of gravity, the pull rope in the suspension assembly quickly pulls the emergency stop switch of the belt coal conveyor to stop the belt from running, thereby avoiding the accumulation of coal blocks and further coal overflow; and can serve as the last line of defense to prevent coal overflow accidents when the mechanical blocking switch fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 It is a schematic diagram of the structure in which the pull rope is directly connected to the coal receiving box in the present invention.

[0021] Figure 2 It is a schematic diagram of the structure of the connection between the pull rope and the suspension ring in the present invention.

[0022] Figure 3 It is a structural schematic diagram of the coal receiving box when it is tilted in the present invention.

[0023] Figure 4 It is a schematic diagram of the structure after the connecting rope is adjusted in the present invention.

[0024] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the present invention.

[0026] In the figure: 100, coal receiving assembly; 101, coal receiving box; 101a, coal collecting trough; 101a-1, columnar section; 101a-2, cone section; 102, spring telescopic rod; 102a, hanging groove; 103, suspension ring; 104, connecting rope; 104a, hanging sleeve; 105, rope buckle; 200, suspension assembly; 201, pull rope; 202, static pulley; 203, pulley bracket. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Example 1

[0032] Reference Figure 1 , which is the first embodiment of the present invention, provides a coal drop pipe coal overflow protection device, including a coal receiving assembly 100 and a hanging assembly 200. The coal receiving assembly 100 includes a coal receiving box 101 for receiving coal overflow from the coal drop pipe; the hanging assembly 200 includes a pull rope 201, one end of the pull rope 201 is connected to the coal receiving box 101, and the other end of the pull rope 201 is connected to the emergency stop switch of the belt coal conveyor.

[0033] Furthermore, the coal receiving box 101 is arranged on the side of the belt coal conveyor directly below the coal dropping pipe. The coal receiving box 101 is provided with a coal receiving trough 101a with an opening at the top. When the coal dropping pipe overflows with coal, a large amount of coal blocks fall from the outlet of the coal dropping pipe onto the belt coal conveyor. The belt coal conveyor cannot receive all the falling coal blocks. Some coal blocks fall from both sides of the belt coal conveyor and fall into the coal receiving trough 101a of the coal receiving box 101. As the number of coal blocks in the coal receiving trough 101a increases, the total weight of the coal receiving box 101 and the coal blocks increases, and the impact force of the coal blocks falling on the coal box 101 causes the coal receiving box 101 to tend to move downward, and the emergency stop switch of the belt coal conveyor is pulled by the pull rope 201, causing the belt coal conveyor to stop running.

[0034] Furthermore, the suspension assembly 200 further includes a static pulley 202 and a pulley bracket 203. One end of the pulley bracket 203 is fixedly connected to a side housing of the belt coal conveyor, and the static pulley 202 is movably mounted on the pulley bracket 203. When in use, the pull rope 201 is passed through the static pulley 202, and the static pulley 202 pulls the pull rope 201, and cooperates with the pull rope 201 to suspend the coal receiving box 101 in mid-air.

[0035] Specifically, the coal receiving box 101 is a cylindrical box body with a regular polygonal or circular bottom surface. Figure 1 As shown, the coal receiving box 101 is a columnar box with a square bottom.

[0036] Specifically, the coal receiving chute 101a includes a columnar section 101a-1 and a conical section 101a-2. The columnar section 101a-1 is arranged along the axial direction of the coal receiving box 101 and one end away from the conical section 101a-2 is the opening of the coal receiving box 101. Figure 1 As shown, the design of the cone section 101a-2 can make the coal blocks entering the coal receiving chute 101a quickly converge to the center, avoiding the accumulation of coal blocks on one side, causing the coal receiving box 101 suspended in the air to shake and unable to receive subsequent falling coal, thereby causing the total weight of the coal receiving box 101 and the coal blocks in the box to never exceed the critical value of pulling the emergency stop switch, making it impossible for the belt coal conveyor to stop operating; or avoiding the accumulation of coal blocks on one side, causing the coal receiving box 101 to tilt, that is, the top opening of the coal receiving box 101 is tilted, causing the coal blocks to be ejected after entering the coal receiving chute 101a, thereby causing the total weight of the coal receiving box 101 and the coal blocks in the box to never exceed the critical value of pulling the emergency stop switch, making it impossible for the belt coal conveyor to stop operating.

[0037] Specifically, one end of the pull rope 201 connected to the coal receiving box 101 is tied to the bottom center of the coal receiving trough 101a.

[0038] Specifically, the pull rope 201 is a flexible steel wire rope.

[0039] Example 2

[0040] Reference Figure 2 and Figure 6 , which is a second embodiment of the present invention, provides a coal drop pipe coal overflow protection device, including a coal receiving assembly 100 and a suspension assembly 200.

[0041] Furthermore, the coal receiving assembly 100 includes a coal receiving box 101 with a coal receiving trough 101a inside and an opening at the top. The coal receiving box 101 is arranged on one side of the belt coal conveyor directly below the coal dropping pipe to receive coal overflowing from the coal dropping pipe.

[0042] Furthermore, a spring telescopic rod 102 is provided on the top of the coal receiving box 101, and the spring telescopic rod 102 is evenly distributed along the outer circumference of the coal receiving box 101, and one end of the spring telescopic rod 102 is hinged to the coal receiving box 101. Figure 2 and 6 As shown, the coal receiving box 101 is a columnar box with a square bottom and an open top. There are four spring telescopic rods 102 which are respectively arranged at the four corners of the top of the coal receiving box 101 .

[0043] Furthermore, the coal receiving assembly 100 also includes a suspension ring 103 and a connecting rope 104 tied to the suspension ring 103. The number of the connecting ropes 104 is the same as the number of the spring telescopic rods 102, and one end of the connecting rope 104 away from the suspension ring 103 is tied to the movable end of the adjacent spring telescopic rod 102.

[0044] Furthermore, the suspension assembly 200 includes a pull rope 201, a static pulley 202, and a pulley bracket 203; wherein, one end of the pulley bracket 203 is fixedly connected to a side shell of the belt coal conveyor, the static pulley 202 is movably mounted on the pulley bracket 203, one end of the pull rope 201 passes through the static pulley 202 and is connected to the emergency stop switch of the belt coal conveyor, and the other end of the pull rope 201 is tied to the suspension ring 103, thereby suspending the coal receiving assembly 100 in mid-air.

[0045] Specifically, when in use, the coal receiving box 101 is arranged on the side of the belt coal conveyor directly below the coal drop pipe with the opening facing upwards, and the pull rope 201, the static pulley 202, and the pulley bracket 203 cooperate with each other to suspend the coal receiving box 101 in mid-air; when the coal drop pipe overflows, the coal blocks overflowing from the side of the belt coal conveyor are received, and as the number of coal blocks in the coal receiving trough 101a increases, the total weight of the coal receiving box 101 and the coal blocks in the box increases, and then the emergency stop switch of the belt coal conveyor is pulled by the pull rope 201 to stop the operation of the belt coal conveyor. Figure 2 and 6 As shown, by cooperating with the suspension ring 103 and the four sets of connecting ropes 104, the tension between the four sets of connecting ropes 104 and the coal receiving box 101 is used to keep the coal receiving box 101 suspended in balance, so that the coal receiving box 101 can remain stable under certain wind force and certain vibration. Figure 2 and 6 As shown, by providing the spring telescopic rod 102, a buffering effect is played to prevent the falling coal block from having too much impact force on the coal box 101, causing the connecting rope 104 or the pull rope 201 to break.

[0046] The remaining structures are the same as those of Example 1.

[0047] Example 3

[0048] Reference Figure 3 to Figure 5, which is the third embodiment of the present invention. This embodiment is different from the second embodiment in that: a hanging sleeve 104a is provided at one end of the connecting rope 104 away from the suspension ring 103, and a hanging groove 102a is provided at the movable end of the spring telescopic rod 102; the hanging sleeve 104a can be sleeved on the hanging groove 102a of the spring telescopic rod 102, and the connecting rope 104 is tightened, such as Figure 5 Specifically, the hanging sleeve 104a cooperates with the hanging groove 102a to make the coal receiving box 101 more quickly disassembled, so that it is convenient to remove the coal receiving box 101 after the belt coal conveyor stops operating, thereby facilitating the pouring out of the coal blocks in the coal receiving box 101.

[0049] Furthermore, a rope buckle 105 is provided on the connecting rope 104 for adjusting the length of the connecting rope 104. Figure 3 As shown, by setting the rope buckle 105, the length of the connecting rope 104 can be flexibly adjusted, that is, the inclination angle of the coal receiving box 101 is adjusted to change the angle at which the coal blocks enter the coal receiving box 101. Figure 4 As shown, by setting the rope buckle 105 and changing the relative length of the connecting ropes 104 on both sides, the coal receiving box 101 is moved laterally, and the position of the coal receiving box 101 is adjusted to ensure that the coal blocks can fall into the coal receiving trough 101a of the coal receiving box 101.

[0050] The remaining structure is the same as that of Example 2.

[0051] In summary, the present invention provides an additional coal overflow protection device on the basis of retaining the original mechanical blocking switch. Through the cooperation between the coal receiving assembly 100 and the suspension assembly 200, when the amount of coal in the coal drop pipe increases and overflows, the coal receiving assembly 100 can receive the overflowed coal blocks in time, and under the action of gravity, the pull rope 201 in the suspension assembly 200 can quickly pull the emergency stop switch of the belt coal conveyor to stop the belt from running, thereby avoiding coal block accumulation and further coal overflow. When the mechanical blocking switch fails, it can serve as the last line of defense to prevent coal overflow accidents.

[0052] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangement, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present invention. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of performing the function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to numerous modifications still falling within the scope of the appended claims.

[0053] Additionally, in order to provide a concise description of exemplary embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0054] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A coal spill protection device for a coal drop pipe, characterized in that: include, A coal receiving assembly (100) comprising a coal receiving box (101), the coal receiving box (101) being arranged on one side of the belt coal conveyor directly below the coal dropping pipe, the coal receiving box (101) being provided with a coal receiving trough (101a) with a top opening for receiving coal overflowing from the coal dropping pipe; A suspension assembly (200) comprises a pull rope (201), a static pulley (202), and a pulley bracket (203); wherein one end of the pulley bracket (203) is fixedly connected to a side housing of a belt coal conveyor, the static pulley (202) is movably mounted on the pulley bracket (203), one end of the pull rope (201) passes through the static pulley (202) and is connected to the emergency stop switch of the belt coal conveyor, and the other end of the pull rope (201) is connected to a coal receiving assembly (100) for suspending the coal receiving assembly (100) in mid-air.

2. The coal spill protection device for a coal drop pipe according to claim 1, characterized in that: The coal receiving box (101) is a columnar box body with a bottom surface that is a regular polyhedral or regular circular shape.

3. The coal spill protection device for a coal drop pipe according to claim 2, characterized in that: The coal receiving chute (101a) comprises a columnar section (101a-1) and a conical section (101a-2); the columnar section (101a-1) is arranged axially along the coal receiving box (101), and one end of the columnar section (101a-1) away from the conical section (101a-2) is an opening of the coal receiving box (101).

4. The coal spill protection device for a coal drop pipe according to claim 3, characterized in that: One end of the pull rope (201) is tied to the bottom center of the coal collecting chute (101a).

5. The coal spill protection device for a coal drop pipe according to claim 1 or 2, characterized in that: The coal receiving assembly (100) further comprises a spring telescopic rod (102) arranged on the top of the coal receiving box (101), the spring telescopic rod (102) being evenly distributed along the outer circumference of the coal receiving box (101), and one end of the spring telescopic rod (102) being hinged to the coal receiving box (101).

6. The coal spill protection device for a coal drop pipe according to claim 5, characterized in that: The coal receiving assembly (100) further comprises a suspension ring (103) and a connecting rope (104) tied to the suspension ring (103); the number of the connecting ropes (104) is the same as the number of the spring telescopic rods (102), and one end of the connecting rope (104) away from the suspension ring (103) is tied to the movable end of the adjacent spring telescopic rod (102).

7. The coal spill protection device for a coal drop pipe according to claim 6, characterized in that: A hanging sleeve (104a) is provided at one end of the connecting rope (104) away from the suspension ring (103), and a hanging groove (102a) is provided at the movable end of the spring telescopic rod (102); the hanging sleeve (104a) can be sleeved on the hanging groove (102a) of the spring telescopic rod (102) to tighten the connecting rope (104).

8. The coal spill protection device for a coal drop pipe according to claim 6 or 7, characterized in that: One end of the pull rope (201) is tied to the suspension ring (103).

9. The coal spill protection device for a coal drop pipe according to claim 1, or 2, or 3, or 4, or 6, or 7, characterized in that: The pull rope (201) is a flexible steel wire rope.

10. The coal spill protection device for a coal drop pipe according to claim 6 or 7, characterized in that: The connecting rope (104) is provided with a rope buckle (105) for adjusting the length of the connecting rope (104).

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