External flashboard door feedback device

Abstract

The utility model belongs to the technical field of gate opening and closing, and particularly discloses an external gate feedback device which comprises a gate frame, a gate plate and a power unit, the gate plate is located in the gate frame, the output end of the power unit is connected with the gate plate, the tail end of the gate plate is connected with a stroke rod, a through hole is formed in the tail end of the gate plate, and the output end of the power unit is connected with the stroke rod. One end of the stroke rod penetrates out of the through hole of the gate frame and is in sliding fit with the through hole. A travel switch fixing support is connected to the outer side of the tail end of the gate frame, an in-place closing travel switch and an in-place opening travel switch are connected to the travel switch fixing support, and the gate plate is in a closed state when the end of the travel rod makes contact with the in-place closing travel switch. And when the end part of the travel rod is in contact with the in-place opening travel switch, the gate plate is in an open state. According to the utility model, the travel switch is externally arranged, so that pulverized coal can be prevented from directly contacting with the travel switch to influence the normal operation of the travel switch.

Description

Technical Field

[0001] The utility model relates to the technical field of gate opening and closing, and in particular to an external gate feedback device. Background Art

[0002] At present, the coal feeder inlet gate uses a hydraulic gate, which is an important component of the power plant boiler coal feeder system. It is located at the coal feeder inlet at the bottom of the coal bunker. Its main function is to control the feed amount of the coal feeder and, when necessary, block the flow of coal to ensure the normal operation of the coal feeder.

[0003] like Figure 4 As shown, the coal feeder inlet gate is mainly composed of a gate frame, a gate, an oil motor, a hydraulic cylinder, a travel switch, etc.

[0004] Door opening principle: Start the oil motor and drive the gate door to move to the right through the hydraulic cylinder. When the stroke block on the gate leaves the closed position stroke switch, the closed position signal disappears. When the stroke block on the gate contacts the open position stroke switch, the oil motor stops.

[0005] Closing principle: Start the oil motor and drive the gate door to move to the left through the hydraulic cylinder. When the stroke block on the gate leaves the open position stroke switch, the open position signal disappears. When the stroke block on the gate contacts the closed position stroke switch, the oil motor stops.

[0006] However, due to the gap between the gate plate and the gate frame, when the coal feeder is running, the coal powder in the coal drop pipe enters the gate frame through the gaps of the gate plate, resulting in the following problems:

[0007] 1. If a certain amount of coal powder enters the gate frame, it will cause the travel switch to get stuck, causing the travel switch to fail to operate.

[0008] 2. If the coal powder contains a lot of water, it will cause the contacts of each travel switch to be abnormally connected, resulting in the gate door being in the open and closed travel states at the same time.

[0009] 3. Because there is no status monitoring means outside the gate, when the gate is open and closed at the same time, it is impossible to accurately judge the opening state of the gate, which affects the safe operation of the coal feeder. Utility Model Content

[0010] The utility model provides an external gate door feedback device, which aims to place a travel switch externally to prevent coal powder from directly contacting the travel switch and affecting the normal operation of the travel switch.

[0011] The utility model is realized by the following technical scheme: an external gate feedback device, comprising a gate frame, a gate, an oil motor and a hydraulic cylinder, wherein the gate is located in the gate frame, the output end of the hydraulic cylinder is connected to the gate, the oil motor is connected to the hydraulic cylinder, the tail end of the gate is connected to a travel rod, the tail end of the gate is provided with a through hole, one end of the travel rod passes through the through hole of the gate frame and is slidably matched with the through hole;

[0012] A travel switch fixing bracket is connected to the outer side of the rear end of the gate frame, and the travel switch fixing bracket is connected to a close-in-position travel switch and an open-in-position travel switch. When the end of the travel rod contacts the close-in-position travel switch, the gate is in a closed state, and when the end of the travel rod contacts the open-in-position travel switch, the gate is in an open state.

[0013] Compared with the prior art, this solution has the following advantages and beneficial effects:

[0014] In this solution, the travel switch fixing bracket is connected to the outer side of the rear end of the gate frame, and the closed position travel switch and the open position travel switch are installed on the travel switch fixing bracket, so that the feedback mechanism of the gate door is externalized. This can avoid the open position travel switch and the closed position travel switch being easily directly contacted with the leaked coal powder when they are located in the gate frame as in the prior art, thereby effectively reducing or avoiding the influence of the leaked coal powder on the normal operation of the travel switch.

[0015] In addition, the external feedback mechanism is externalized, which makes it easy to visually observe the actual switching state of the gate door outside the gate door, and to clean the travel switch in time to avoid affecting its normal operation.

[0016] Furthermore, a sealing component is provided at the through hole at the rear end of the gate frame.

[0017] Beneficial effect: The setting of the sealing component can further solve the problem of switch jamming caused by coal powder entering the gate frame. The sealing component can further improve the sealing of the gate frame and prevent the coal powder entering the gate frame from escaping from the through hole.

[0018] Furthermore, a recessed block is provided at the tail end of the gate plate, the through hole is located on the recessed block and communicates with the recessed cavity of the recessed block, the sealing assembly can be inserted into the recessed cavity of the recessed block and connected to the tail end of the gate plate, and the travel rod passes through the through hole and the sealing assembly in sequence.

[0019] Beneficial effects: The arrangement of the concave block in the present solution facilitates the installation of the sealing assembly. The sealing assembly is installed in the concave block to seal the gap between the travel rod and the through hole, thereby reducing the amount of coal powder released.

[0020] Furthermore, the sealing assembly includes a sealing plate, a sealing cylinder and a sealing gasket, the sealing gasket is located in the concave cavity of the concave block, the sealing cylinder is connected to the sealing plate, the sealing cylinder is inserted into the concave cavity of the concave block and abuts against the sealing gasket, the sealing plate is located outside the concave cavity of the concave block and is connected to the gate frame, and the sealing cylinder and the sealing gasket both have an inner hole for the travel rod to pass through.

[0021] Beneficial effect: The sealing gasket in the sealing assembly in this scheme can mainly play a sealing role, while the sealing cylinder is used to press the sealing gasket tightly, and the sealing plate is used to connect with the gate frame, thereby limiting and fixing the sealing gasket, ensuring a stable connection between the entire sealing assembly and the gate frame, and playing a stable sealing role.

[0022] Furthermore, the inner wall of the inner hole of the sealing gasket is in contact with the outer side of the travel rod.

[0023] Beneficial effect: Such an arrangement can improve the sealing effect of the sealing gasket.

[0024] Furthermore, the sealing gasket is a rubber gasket.

[0025] Beneficial effect: In this solution, the sealing gasket adopts a rubber gasket, so that the sealing gasket has a certain degree of deformability. In this way, in actual design, the inner hole wall of the sealing gasket can form a close fit with the stroke rod, while ensuring the normal sliding of the stroke rod, which can further improve the sealing effect.

[0026] Furthermore, the sealing assembly is detachably connected to the gate frame.

[0027] Beneficial effects: This solution makes it easy to install and replace the sealing component, and is more flexible and convenient to use.

[0028] Furthermore, a travel rod fixing block is connected to the tail of the gate plate, and the travel rod is detachably connected to the travel rod fixing block.

[0029] Beneficial effect: In this solution, a travel rod fixing block is connected separately at the tail of the gate, which is convenient for providing a connection point for the travel rod, and the travel rod and the travel rod fixing block are detachably connected, which is convenient for assembly and replacement of the travel rod according to actual conditions.

[0030] Furthermore, one end of the travel rod is connected to a travel rod fixing bolt, and the travel rod is threadedly connected to the travel rod fixing block via the bolt.

[0031] Beneficial effects: In this solution, the sealing assembly is threadedly connected to the travel rod fixing block through bolts, thereby indirectly realizing a detachable connection with the gate plate, and its connection method and connection structure are relatively simple.

[0032] Furthermore, the travel rod includes a rod portion and a limiting portion, one end of the rod portion is connected to the rear end of the gate plate, and the other end of the rod portion is vertically connected to the limiting portion.

[0033] Beneficial effects: In the present solution, the rod portion of the travel rod can slide horizontally to close or open the gate, and the limit portion can be easily contacted and sensed with the open position travel switch and the closed position travel switch.

[0034] The present invention solves the problem of travel switch (closed position travel switch and open position travel switch) being stuck due to coal powder entering the gate frame; solves the problem of abnormal connection of travel switch contacts and simultaneous existence of gate door open and closed travel states due to heavy water content in coal powder; the present invention places the gate door feedback mechanism externally, and the actual switch state of the gate door can be intuitively observed outside the gate door according to the position between the travel rod and the travel switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, constitute a part of this application, and do not constitute a limitation of the embodiments of the present utility model. In the drawings:

[0036] Figure 1 It is a top view of an embodiment of an external gate feedback device of the utility model;

[0037] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0038] Figure 3 is a side view of the sealing assembly;

[0039] Figure 4 It is a structural diagram of the inlet gate door of the coal feeder in the prior art.

[0040] Marks and corresponding parts names in the attached drawings:

[0041] Gate frame 1, recessed block 101, gate plate 2, hydraulic cylinder 3, oil motor 4, travel rod fixing block 5, travel rod fixing bolt 6, travel rod 7, rod portion 701, limiting portion 702, sealing assembly 8, sealing plate 801, sealing cylinder 802, sealing gasket 803, closed position travel switch 9, travel switch fixing bracket 10, open position travel switch 11, bolt 12. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

[0043] Example 1

[0044] like Figure 1 As shown, this embodiment 1 provides an external gate door feedback device, including a gate frame 1, a gate 2, and a power unit. In this embodiment, the power unit includes an oil motor 4 and a hydraulic cylinder 3. The gate 2 is located in the gate frame 1 and is used to open and close the coal feeder inlet.

[0045] The output end of the hydraulic cylinder 3 is connected to the gate plate 2, and the gate plate 2 is driven to open and close the coal feeder inlet through the telescopic movement of the output end of the hydraulic cylinder 3.

[0046] The oil motor 4 is connected to the hydraulic cylinder 3. In this embodiment, the left end of the gate plate 2 is the head end of the gate plate 2, and the right end of the gate plate 2 is the tail end of the gate plate 2. A travel rod 7 is connected to the tail end of the gate plate 2. A through hole is opened at the tail end of the gate plate 2. One end of the travel rod 7 passes through the through hole of the gate frame 1 and slides with the through hole, so that the hydraulic cylinder 3 can drive the travel rod 7 to move horizontally.

[0047] A travel switch fixing bracket 10 is connected to the outer side of the rear end of the gate frame 1 . In this embodiment, the travel switch fixing bracket 10 is fixed to the outer side of the rear end of the gate frame 1 by welding.

[0048] The travel switch fixing bracket 10 is connected to the in-position travel switch 9 and the open-position travel switch 11. When the end of the travel rod 7 contacts the closed-position travel switch 9, the gate 2 is in a closed state, and when the end of the travel rod 7 contacts the open-position travel switch 11, the gate 2 is in an open state.

[0049] In this embodiment, the travel switch fixing bracket 10 is located on the upper side of the travel rod 7 ( Figure 1 Perspective), and the travel switch fixing bracket 10 and the travel rod 7 are arranged parallel to each other, the closed position travel switch 9 is located on the left part of the travel switch fixing bracket 10, and the open position travel switch 11 is located on the right part of the travel switch fixing bracket 10.

[0050] In this embodiment, the travel rod 7 includes a rod portion 701 and a limit portion 702. One end of the rod portion 701 is welded or detachably connected to the rear end of the gate plate 2. In this embodiment, the rod portion 701 is welded and fixed to the gate plate 2. The other end of the rod portion 701 is vertically connected to the limit portion 702. In this embodiment, the rod portion 701 and the limit portion 702 are integrally formed. The rod portion 701 passes through the through hole at the rear end of the gate frame 1, the limit portion 702 is located on the outside of the gate frame 1, and the closed position travel switch 9 is located on the left side of the limit portion 702.

[0051] The specific implementation process is as follows:

[0052] Door opening principle: start the oil motor 4, which provides hydraulic power for the hydraulic cylinder 3. The gate 2 of the gate door is driven to move to the right through the retraction movement of the output shaft of the hydraulic cylinder 3. The gate 2 drives the travel rod 7 to move. When the limit part 702 of the travel rod 7 leaves the closed position travel switch 9, the closed position signal disappears. When the limit part 702 of the travel rod 7 contacts the open position travel switch 11, the oil motor 4 stops.

[0053] Door closing principle: start the oil motor 4, drive the gate door gate 2 to move to the left through the hydraulic cylinder 3, and the gate 2 drives the travel rod 7 to move. When the limit part 702 of the travel rod 7 leaves the open position travel switch 11, the open position signal disappears. When the limit part 702 of the travel rod 7 contacts the closed position travel switch 9, the oil motor 4 stops.

[0054] In this embodiment, the closed position travel switch 9 and the open position travel switch 11 are located on the outside of the gate frame 1, which can effectively avoid contact with the coal powder leaked in the gate frame 1, effectively isolate the coal powder, and solve the problem of travel switch jamming due to coal powder entering the gate frame 1. Moreover, the actual switching state of the gate door can be intuitively observed outside the gate door based on the position relationship between the limit part 702 of the travel rod 7 and the closed position travel switch 9 and the open position travel switch 11.

[0055] Example 2

[0056] Combination Figure 2 As shown, the difference between this embodiment and embodiment 1 is that: in this embodiment, a sealing assembly 8 is provided at the through hole at the rear end of the gate frame 1, and a recessed block 101 is provided at the rear end of the gate plate 2, so that the recessed block 101 has a concave cavity for accommodating the sealing assembly 8, the recessed block 101 and the gate plate 2 are integrally formed, the through hole at the rear end of the gate plate 2 is located on the recessed block 101 and communicates with the concave cavity of the recessed block 101, the sealing assembly 8 can be inserted into the concave cavity of the recessed block 101 and connected to the rear end of the gate plate 2, and the travel rod 7 passes through the through hole and the sealing assembly 8 in sequence.

[0057] Specifically: In this embodiment, the sealing component 8 is detachably connected to the gate frame 1, and the sealing component 8 includes a sealing plate 801, a sealing cylinder 802 and a sealing gasket 803. The sealing gasket 803 is located in the concave cavity of the concave block 101. In this embodiment, two sealing gaskets 803 are provided, and the sealing cylinder 802 is connected to the sealing plate 801. In this embodiment, the sealing plate 801 is in the shape of a circular plate, and the sealing plate 801 and the sealing cylinder 802 are integrally formed.

[0058] The sealing cylinder 802 is inserted into the concave cavity of the concave block 101 and abuts against the sealing gasket 803. The sealing plate 801 is located outside the concave cavity of the concave block 101 and connected to the gate frame 1. Figure 3As shown, in this embodiment, four bolt holes are opened in the circumference of the sealing plate 801, and four holes matching the four bolt holes are opened at the rear end of the gate frame 1. The sealing plate 801 and the gate frame 1 are detachably connected to each other by inserting bolts 12 into the bolt holes, thereby realizing a detachable connection relationship between the sealing assembly 8 and the gate frame 1, which is convenient for replacement and installation.

[0059] Both the sealing cylinder 802 and the sealing gasket 803 have an inner hole for the travel rod 7 to pass through. In this embodiment, the inner wall of the inner hole of the sealing gasket 803 fits with the outer side of the travel rod 7. In this embodiment, the sealing gasket 803 is a rubber gasket made of rubber material, which makes the sealing gasket 803 deformable. The inner hole diameter of the sealing gasket 803 can be equal to or less than the diameter of the rod portion 701 of the travel rod 7, so that the sealing performance between the sealing gasket 803 and the travel rod 7 is better. At the same time, the rod portion 701 of the travel rod 7 can slide axially in the inner hole of the sealing gasket 803, and the aperture of the through hole and the inner hole of the sealing cylinder 802 is larger than the diameter of the rod portion 701 of the travel rod 7, which can reduce the sliding resistance of the rod portion 701 of the travel rod 7.

[0060] The sealing assembly 8 in this embodiment can further prevent coal powder from flying out of the gate frame 1, and can further prevent coal powder from contacting the travel switch, thereby further preventing coal powder from directly contacting the travel switch and affecting the normal operation of the travel switch.

[0061] Example 3

[0062] like Figure 1 As shown, the difference between this embodiment and embodiment 1 is that: in this embodiment, the travel rod 7 is detachably connected to the tail end of the gate plate 2. Specifically, a travel rod fixing block 5 is connected to the tail end of the gate plate 2. In this embodiment, the travel rod fixing block 5 is welded and fixed to the gate plate 2, and the travel rod 7 is detachably connected to the travel rod fixing block 5.

[0063] Specifically: one end of the rod portion 701 of the travel rod 7 is connected to the travel rod fixing bolt 6. In this embodiment, one end of the rod portion 701 of the travel rod 7 is welded to the head of the travel rod fixing bolt 6. The travel rod 7 is threadedly connected to the travel rod fixing block 5 through the threaded rod on the travel rod fixing bolt 6, thereby realizing the detachable connection between the travel rod 7 and the gate plate 2.

[0064] It should be noted that the above description of the disclosed embodiments enables professionals and technicians in the field to implement or use the present application. Various modifications to these embodiments will be apparent to professionals and technicians in the field, and the general principles defined herein can be implemented in other embodiments without departing from the scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

[0065] In the description of the present invention, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0066] In the description of this document, terms such as "up", "down", "left", "right", "front", "back", "top", "bottom", "inside", "outside", "middle", "vertical", "horizontal", "lateral", and "longitudinal" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only used to illustrate the relative positional relationships between the various components or components, and do not particularly limit the specific installation orientations of the various components or components.

[0067] In the description of this document, some terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in this application can be understood according to the specific circumstances.

[0068] In the description of this document, the terms "installed", "set", "provided with", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0069] The structures, proportions, sizes, etc. drawn in the drawings in this application are only used to match the contents disclosed in this technical briefing book for technical personnel in this field to understand and read, and are not used to limit the restrictive conditions for the implementation of this application. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0070] The terms used in this document are those common terms currently widely used in the art in consideration of the functions of the present disclosure, but these terms may vary according to the intention of a person of ordinary skill in the art, precedents, or new technologies in the art. In addition, specific terms may be selected by the applicant, and in this case, their detailed meanings will be described in the detailed description of the present disclosure. Therefore, the terms used in the document should not be understood as simple names, but rather as an overall description based on the meaning of the terms and the present disclosure.

[0071] Flowcharts or text are used in this document to illustrate the operating steps performed according to the embodiments of the present application. It should be understood that the operating steps in the embodiments of the present application are not necessarily accurately performed in the order of recording. On the contrary, various steps can be processed in reverse order or simultaneously as needed. At the same time, other operations can also be added to these processes, or a certain step or several steps can be removed from these processes.

[0072] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An external gate feedback device, comprising a gate frame, a gate, and a power unit, wherein the gate is located in the gate frame, and the output end of the power unit is connected to the gate, characterized in that: The tail end of the gate is connected with a travel rod, the tail end of the gate is provided with a through hole, one end of the travel rod passes through the through hole of the gate frame and is slidably matched with the through hole; A travel switch fixing bracket is connected to the outer side of the rear end of the gate frame, and the travel switch fixing bracket is connected to a close-in-position travel switch and an open-in-position travel switch. When the end of the travel rod contacts the close-in-position travel switch, the gate is in a closed state, and when the end of the travel rod contacts the open-in-position travel switch, the gate is in an open state.

2. The external gate feedback device according to claim 1, characterized in that: A sealing component is provided at the through hole at the rear end of the gate frame.

3. The external gate feedback device according to claim 2, characterized in that: A recessed block is provided at the tail end of the gate plate, the through hole is located on the recessed block and communicates with the recessed cavity of the recessed block, the sealing assembly can be inserted into the recessed cavity of the recessed block and connected to the tail end of the gate plate, and the travel rod passes through the through hole and the sealing assembly in sequence.

4. The external gate feedback device according to claim 3 is characterized in that: The sealing assembly includes a sealing plate, a sealing cylinder and a sealing gasket, the sealing gasket is located in the concave cavity of the concave block, the sealing cylinder is connected to the sealing plate, the sealing cylinder is inserted into the concave cavity of the concave block and abuts against the sealing gasket, the sealing plate is located outside the concave cavity of the concave block and is connected to the gate frame, and the sealing cylinder and the sealing gasket both have an inner hole for the travel rod to pass through.

5. The external gate feedback device according to claim 4, characterized in that: The inner wall of the inner hole of the sealing pad is in contact with the outer side of the travel rod.

6. The external gate feedback device according to claim 5, characterized in that: The sealing pad is a rubber pad.

7. An external gate feedback device according to any one of claims 2 to 6, characterized in that: The sealing assembly is detachably connected to the gate frame.

8. The external gate feedback device according to claim 1, characterized in that: A travel rod fixing block is connected to the tail of the gate plate, and the travel rod is detachably connected to the travel rod fixing block.

9. The external gate feedback device according to claim 8, characterized in that: One end of the travel rod is connected with a travel rod fixing bolt, and the travel rod is threadedly connected to the travel rod fixing block through the bolt.

10. An external gate feedback device according to any one of claims 1-6, 8 or 9, characterized in that: The travel rod comprises a rod portion and a limiting portion, one end of the rod portion is connected to the rear end of the gate plate, and the other end of the rod portion is vertically connected to the limiting portion.

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