Electro-hydraulic push rod stroke limiting device for blanking hopper

Abstract

The utility model provides an electro-hydraulic push rod travel limiting device for a blanking hopper, which comprises the blanking hopper, an electro-hydraulic push rod, at least two first measurement and control parts and a second measurement and control part, one of the first measurement and control parts and the second measurement and control part is a travel switch, and the other one is a trigger structure matched with the travel switch. According to the electro-hydraulic push rod stroke limiting device for the discharging hopper, the first measurement and control parts are arranged on the outer wall of the discharging hopper, the second measurement and control parts are only arranged on the push rod bodies of the electro-hydraulic push rods, the second measurement and control parts are driven to trigger the first measurement and control parts through stretching and retracting of the electro-hydraulic push rods, and therefore stretching and retracting stopping control is achieved. The problem of deformation of the sliding rod does not exist, work is reliable and stable, and the electric-hydraulic push rod can work reliably.

Description

Technical Field

[0001] The utility model belongs to the technical field of conveying equipment, and in particular relates to an electro-hydraulic push rod travel limiting device for a lower hopper. Background Art

[0002] The material dispensing hopper has multiple discharge ports, and the discharge direction of the material is controlled by one or more valve plates inside. In the related prior art, the rotation of the valve plate is controlled by an electro-hydraulic push rod. Figure 4 The electro-hydraulic push rod is provided with a travel switch on the housing, a guide seat is provided on the travel switch, a slide bar support is fixedly provided on the push rod of the electro-hydraulic push rod, a slide bar parallel to the push rod is installed on the slide bar support, the slide bar passes through the guide seat, and bump blocks are provided on both sides of the guide seat. When working, the push rod will pull the slide bar when extending or retracting, and the bump block on the slide bar cooperates with the travel switch to realize the travel limit. In this prior art, there is a situation where the material adheres to the slide bar, which will cause the slide bar to get stuck and deformed, and then the electro-hydraulic push rod cannot obtain the start-stop signal normally. Utility Model Content

[0003] The utility model aims to solve at least one of the above-mentioned technical problems existing in the prior art. To this end, the utility model provides an electro-hydraulic push rod stroke limit device for a lower hopper, which can avoid the problem that the electro-hydraulic push rod cannot be started and stopped normally.

[0004] According to the first embodiment of the utility model, the electro-hydraulic push rod stroke limit device for the lower hopper includes:

[0005] The lower hopper has a valve plate that rotates inside;

[0006] An electro-hydraulic push rod is arranged on the outer side of the hopper wall of the lower hopper and connected to the valve plate to control the rotation of the valve plate;

[0007] At least two first measurement and control parts are spaced apart along the axial direction of the electro-hydraulic push rod, and the first measurement and control parts are arranged on the outer side of the bucket wall of the lower hopper;

[0008] A second measurement and control unit is provided on the push rod of the electro-hydraulic push rod and can be connected to the first measurement and control unit one by one during the extension and retraction process of the push rod of the electro-hydraulic push rod;

[0009] Among them, one of the first measurement and control part and the second measurement and control part is a travel switch, and the other is a trigger structure matching the travel switch.

[0010] The electro-hydraulic push rod stroke limit device for the lower hopper according to the embodiment of the utility model has at least the following beneficial effects: the electro-hydraulic push rod stroke limit device for the lower hopper of the utility model has multiple first measurement and control parts on the outer wall of the lower hopper, and only the second measurement and control part is set on the push rod of the electro-hydraulic push rod. The second measurement and control part is driven to trigger the first measurement and control part through the extension and retraction of the electro-hydraulic push rod, thereby realizing the extension and retraction stop control. Compared with the traditional structure, there is no problem of sliding rod deformation, the operation is reliable and stable, and the electro-hydraulic push rod can work reliably.

[0011] According to some embodiments of the utility model, the electro-hydraulic push rod stroke limit device for the lower hopper also includes a mounting bracket, which is arranged on the outside of the hopper wall of the lower hopper and is provided with a mounting plate, and the first measurement and control unit is arranged on the lower end surface of the mounting plate.

[0012] According to some embodiments of the utility model, the mounting bracket is provided with a support plate, a plurality of cross slots are arranged on the support plate, and the mounting bracket is installed on the outer side of the bucket wall of the lower hopper by passing screws through the cross slots, and the mounting plate is horizontally connected to the lower end of the support plate.

[0013] According to some embodiments of the utility model, the electro-hydraulic push rod stroke limiting device for the lower hopper also includes a protective cover, which is arranged above the first measurement and control part and covers the first measurement and control part.

[0014] According to some embodiments of the utility model, a rib is provided at the lower end of the protective cover in a direction away from the lower hopper, and the rib is distributed at least at two ends of the protective cover.

[0015] According to some embodiments of the utility model, an end of the protective cover away from the lower hopper is lower than an end close to the lower hopper.

[0016] According to some embodiments of the present utility model, the protective cover is welded to the outer side of the bucket wall of the lower hopper.

[0017] According to some embodiments of the utility model, the push rod of the electro-hydraulic push rod is hinged with a swing arm, and the swing arm is connected to the rotating shaft of the valve plate in a fixed angle manner.

[0018] According to some embodiments of the present utility model, the travel switch is a mechanical structure, and the trigger structure touches the travel switch during the extension and retraction process of the electro-hydraulic push rod.

[0019] According to some embodiments of the utility model, the trigger structure includes a mounting seat, a trigger head and a reset assembly, the mounting seat is arranged on the push rod of the electro-hydraulic push rod, the trigger head can be adjusted along the axial direction of the electro-hydraulic push rod and is arranged on the mounting seat, and the reset assembly is arranged at both ends of the trigger head for keeping the trigger head in the middle position of the adjustment stroke.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 A schematic diagram of a setting for a single electro-hydraulic push rod;

[0024] Figure 3 A schematic diagram of the positional relationship between the first measurement and control unit and the second measurement and control unit;

[0025] Figure 4 This is a schematic diagram of the traditional structure. DETAILED DESCRIPTION

[0026] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0027] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0028] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] The material dispensing hopper has a plurality of discharge ports 102, and the discharge direction of the material is controlled by one or more valve plates inside. In the related prior art, the rotation of the valve plate is controlled by an electro-hydraulic push rod 200, referring to Figure 4 The electro-hydraulic push rod 200 is provided with a travel switch on the housing, a guide seat is provided on the travel switch, a slide bar 300 support is fixedly provided on the push rod of the electro-hydraulic push rod 200, a slide bar 300 parallel to the push rod is installed on the slide bar 300 support, the slide bar 300 passes through the guide seat, and bump blocks 301 are provided on both sides of the guide seat. When working, the push rod will pull the slide bar 300 when extending or retracting, and the bump block 301 on the slide bar 300 cooperates with the travel switch to realize the travel limit. In the prior art, there is a situation where the material adheres to the slide bar 300, which will cause the slide bar 300 to get stuck and deformed, and then cause the electro-hydraulic push rod 200 to be unable to obtain the start-stop signal normally.

[0031] To this end, the utility model provides an electro-hydraulic push rod stroke limit device for the lower hopper, which can avoid the problem that the electro-hydraulic push rod 200 cannot be started and stopped normally.

[0032] Reference Figures 1 to 4 As shown, an electro-hydraulic push rod stroke limit device for a lower hopper of an embodiment of the utility model comprises a lower hopper 100, an electro-hydraulic push rod 200, a first measurement and control unit 201, a second measurement and control unit 202 and a control unit, wherein a valve plate is rotatably arranged inside the lower hopper 100; the electro-hydraulic push rod 200 is arranged on the outer side of the bucket wall of the lower hopper 100, and is connected to the valve plate for controlling the rotation of the valve plate; at least two first measurement and control units 201 are arranged, and are distributed at intervals along the axial direction of the electro-hydraulic push rod 200, and the first measurement and control unit 201 is arranged on the outer side of the bucket wall of the lower hopper 100; the second measurement and control unit 202 is arranged on the push rod of the electro-hydraulic push rod 200, and can be connected to the first measurement and control unit 201 one by one during the extension and retraction process of the push rod of the electro-hydraulic push rod 200; wherein, one of the first measurement and control unit 201 and the second measurement and control unit 202 is a travel switch, and the other is a trigger structure matching the travel switch. The control unit is connected to the electro-hydraulic push rod 200 , the first measurement and control unit 201 and the second measurement and control unit 202 , and is used to implement extension stop control or retraction stop control of the electro-hydraulic push rod 200 according to trigger signals of the first measurement and control unit 201 and the second measurement and control unit 202 .

[0033] It should be noted that since the number of valve plates provided in the lower hopper 100 varies depending on the number of discharge ports 102 , the utility model is for the rotation control of each valve plate, and each valve plate is provided with the above-mentioned electro-hydraulic push rod 200 , the first measurement and control unit 201 and the second measurement and control unit 202 .

[0034] The electric-hydraulic push rod stroke limit device for the lower hopper of the utility model has a plurality of first measurement and control parts 201 arranged on the outer wall of the lower hopper 100, and only the second measurement and control part 202 is arranged on the push rod of the electric-hydraulic push rod 200. The second measurement and control part 202 is driven to trigger the first measurement and control part 201 through the extension and retraction of the electric-hydraulic push rod 200, thereby realizing the extension and retraction stop control. Compared with the traditional structure, there is no problem of deformation of the slide rod 300, the operation is reliable and stable, and the electric-hydraulic push rod 200 can work reliably. It is preferred to set the first measurement and control part 201 as a stroke switch and the second measurement and control part 202 as a trigger structure.

[0035] In some embodiments of the utility model, the electro-hydraulic push rod stroke limit device for the lower hopper also includes a mounting bracket 204, which is arranged on the outer side of the hopper wall of the lower hopper 100 and is provided with a mounting plate, and the first measurement and control unit 201 is arranged on the lower end surface of the mounting plate. Since the lower hopper 100 will have material splashing from the top when it is docked with other conveying equipment for material distribution, such as the material distribution lower hopper, this embodiment uses the mounting bracket 204 to install the first measurement and control unit 201, and the first measurement and control unit 201 is arranged below the mounting plate, which can avoid damage caused by material splashing, and ensure the service life and stable realization of the telescopic mechanism of the electro-hydraulic push rod 200.

[0036] In some embodiments of the utility model, the mounting bracket 204 is provided with a support plate, and a plurality of cross slots are provided on the support plate, and the mounting bracket 204 is installed on the outer side of the bucket wall of the lower hopper 100 by inserting screws through the cross slots, and the mounting plate is horizontally connected to the lower end of the support plate. With the structural setting of this embodiment, the mounting bracket 204 uses the support plate to fit the bucket wall of the lower hopper 100, which can ensure the stability of the mounting plate. At the same time, the position adjustment of the mounting bracket 204 can be achieved by using the setting of the cross slot, and then the position adjustment of the first measurement and control unit 201 can be achieved, which is convenient for adjusting the position of the first measurement and control unit 201 according to the actual installation situation, and ensuring that the first measurement and control unit 201 and the second measurement and control unit 202 can be accurately docked.

[0037] In some embodiments of the utility model, the electric hydraulic push rod stroke limit device for the lower hopper further includes a protective cover 203, which is arranged above the first measurement and control unit 201 and covers the first measurement and control unit 201. In this embodiment, by adding a protective cover 203 above the first measurement and control unit 201, the first measurement and control unit 201 can be further protected to prevent material splashing and damage, or erroneous triggering. Figure 1It can be understood that, for the same electro-hydraulic push rod 200, a protective cover 203 is used to cover the two corresponding first measurement and control parts 201 at the same time.

[0038] In some embodiments of the utility model, the lower end of the protective cover 203 is provided with ribs in the direction away from the lower hopper 100, and the ribs are distributed at least at both ends of the protective cover 203. Since the mounting bracket 204 is mainly used to install the first measurement and control unit 201, in order to avoid affecting the docking of the first measurement and control unit 201 and the second measurement and control unit 202, the mounting plate should not be extended too long, and it is better to keep the detection end of the first measurement and control unit 201 extended, which may cause the material to touch the detection end when splashing, resulting in uncontrolled triggering. By providing ribs, this embodiment can improve the structural strength of the protective cover 203, thereby extending the distance of the protective cover 203 away from the lower hopper 100, covering the entire mounting bracket 204 and the first measurement and control unit 201, and extending to an appropriate position above the electro-hydraulic push rod 200, so that the material will not splash onto the electro-hydraulic push rod 200 and then fall back to touch the first measurement and control unit 201.

[0039] In some embodiments of the present invention, the end of the protective cover 203 away from the lower hopper 100 is lower than the end close to the lower hopper 100. Through the height difference design, the protective cover 203 is extended downwardly, which is convenient for materials to fall back and avoid material accumulation.

[0040] Since the coverage area of ​​the protective cover 203 is fixed and does not need to be adjusted, in some embodiments of the present invention, the protective cover 203 is welded to the outer side of the hopper wall of the lower hopper 100 .

[0041] In some embodiments of the present invention, the push rod of the electro-hydraulic push rod 200 is hinged with a swing arm 205, and the swing arm 205 is connected to the rotating shaft of the valve plate at a fixed angle. The electro-hydraulic push rod 200 controls the swing arm 205 to rotate by telescoping, thereby driving the valve plate to rotate.

[0042] In some embodiments of the present invention, the travel switch is a mechanical structure, and the trigger structure touches the travel switch during the extension and retraction process of the electro-hydraulic push rod 200. Specifically, the travel switch is rotatably provided with a lever, the lever extends horizontally, and a roller is rotatably provided at the end thereof. When the trigger structure moves to contact the roller, it will push the lever to rotate and trigger the travel switch. In this process, the roller can rotate with the trigger structure to avoid rigid wear.

[0043] In some embodiments of the utility model, the trigger structure includes a mounting seat, a trigger head and a reset assembly, the mounting seat is arranged on the push rod of the electro-hydraulic push rod 200, the trigger head can be adjusted along the axial direction of the electro-hydraulic push rod 200 and is arranged on the mounting seat, and the reset assembly is arranged at both ends of the trigger head to keep the trigger head in the middle position of the adjustment stroke. With the structural setting of this embodiment, the trigger structure pushes the roller through the trigger head, thereby realizing the movement of the lever, and the trigger head has a certain elastic adjustment stroke through the setting of the reset assembly, which can avoid damage caused by rigid contact with the first measurement and control unit 201.

[0044] Reference Figures 1 to 3In some embodiments of the utility model, the electro-hydraulic push rod stroke limit device for the lower hopper includes a lower hopper 100, an electro-hydraulic push rod 200, a first measurement and control unit 201, a second measurement and control unit 202 and a control unit. The lower hopper 100 is a four-way hopper, including a feed port 101 at the upper end and three discharge ports 102 distributed from left to right at the lower end, and the feed port 101 is connected to the conveying equipment. Three valve plates are arranged in the lower hopper 100, and the feed port 101 is controlled to communicate with any discharge port 102 through the rotation and coordination of the three valve plates. There are three electro-hydraulic push rods 200, and they are all rotatably arranged on the outer side of the bucket wall of the lower hopper 100. A bent swing arm 205 is rotatably arranged at the push rod end of each electro-hydraulic push rod 200, and the end of the swing arm 205 is fixed downwardly to the rotating shaft of the valve plate. When the electro-hydraulic push rod 200 is extended and retracted, it will drive the swing arm 205 to rotate around the rotating shaft of the valve plate, thereby controlling the rotation of the valve plate. It is understandable that, due to the rotation of the swing arm 205, the push rod part of the electro-hydraulic push rod 200 will inevitably change its angle. Since the electro-hydraulic push rod 200 is rotatably mounted outside the bucket wall of the lower hopper 100, no interference will occur, and the rotation adjustment of the valve plate can be smoothly achieved. The first measurement and control unit 201 is provided with two corresponding to each electro-hydraulic push rod 200. Specifically, a mounting bracket 204 is provided on the outer side of the bucket wall of the lower hopper 100. The mounting bracket 204 is an angle steel structure composed of a support plate and a mounting plate. The support plate is provided with a cross groove and is fixed to the bucket wall of the lower hopper 100 by inserting screws. The mounting plate is fixed in a horizontal and vertical manner to the bucket wall of the lower hopper 100. The first measurement and control unit 201 is installed at the lower end of the mounting plate. The first measurement and control unit 201 is rotatably provided with a lever for triggering, and the end of the lever extends from the lower end of the mounting plate in a direction away from the lower hopper 100, and a roller is rotatably provided. The second measurement and control unit 202 is fixed to the push rod part of the electro-hydraulic push rod 200, so that when the push rod is extended or retracted, the second measurement and control unit 202 will move accordingly, thereby pushing the roller and toggling the lever to achieve detection triggering. In order to achieve a safer trigger, the second measurement and control unit 202 includes a mounting seat, a trigger head and a reset assembly. The mounting seat is fixed to the push rod, and the mounting seat is provided with a guide rod along the axial direction of the electro-hydraulic push rod 200. The trigger head is slidably arranged on the guide rod, and the reset assembly is provided with springs on the guide rods at both ends of the trigger head. In this way, the trigger head has a two-way elastic free adjustment stroke. A protective cover 203 is welded above the two mounting brackets 204 of the lower hopper 100. The distance of the protective cover 203 in the direction away from the wall of the lower hopper 100 is greater than the maximum distance from the axis of the electro-hydraulic push rod 200 to the wall of the lower hopper 100, so that when materials splash onto the protective cover 203, they will fall from the end of the electro-hydraulic push rod 200 away from the lower hopper 100, and will not fall into the end close to the first measurement and control unit 201, which can effectively prevent uncontrolled triggering. The control unit is the control center, which is used to receive the trigger signal of the first measurement and control unit 201 to control the stop of the electro-hydraulic push rod 200.

[0045] The present invention is described in detail above in conjunction with the embodiments, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. An electro-hydraulic push rod stroke limit device for a lower hopper, characterized in that: include: The lower hopper has a valve plate rotating inside; An electro-hydraulic push rod is arranged on the outer side of the hopper wall of the lower hopper and connected to the valve plate to control the rotation of the valve plate; At least two first measurement and control parts are spaced apart along the axial direction of the electro-hydraulic push rod, and the first measurement and control parts are arranged on the outer side of the bucket wall of the lower hopper; A second measurement and control unit is provided on the push rod of the electro-hydraulic push rod and can be connected to the first measurement and control unit one by one during the extension and retraction process of the push rod of the electro-hydraulic push rod; Among them, one of the first measurement and control part and the second measurement and control part is a travel switch, and the other is a trigger structure matching the travel switch.

2. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 1, characterized in that: The electro-hydraulic push rod stroke limiting device for the lower hopper also includes a mounting bracket, which is arranged on the outer side of the hopper wall of the lower hopper and is provided with a mounting plate, and the first measurement and control part is arranged on the lower end surface of the mounting plate.

3. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 2, characterized in that: The mounting bracket is provided with a support plate, a plurality of cross slots are arranged on the support plate, and the mounting bracket is mounted on the outer side of the bucket wall of the lower hopper by inserting screws through the cross slots, and the mounting plate is horizontally connected to the lower end of the support plate.

4. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 1, characterized in that: The electro-hydraulic push rod stroke limiting device for the lower hopper also includes a protective cover, which is arranged above the first measurement and control part and covers the first measurement and control part.

5. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 4, characterized in that: The lower end of the protective cover is provided with ribs in a direction away from the lower hopper, and the ribs are distributed at least at two ends of the protective cover.

6. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 4, characterized in that: An end of the protective cover away from the lower hopper is lower than an end close to the lower hopper.

7. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 4, characterized in that: The protective cover is welded to the outer side of the bucket wall of the lower hopper.

8. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 1, characterized in that: The push rod of the electro-hydraulic push rod is hinged with a swing arm, and the swing arm is connected to the rotating shaft of the valve plate in a fixed angle manner.

9. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 1, characterized in that: The travel switch is a mechanical structure, and the trigger structure touches the travel switch during the extension and retraction process of the electro-hydraulic push rod.

10. The electro-hydraulic push rod stroke limiting device for the lower hopper according to claim 9, characterized in that: The trigger structure includes a mounting seat, a trigger head and a reset assembly. The mounting seat is arranged on the push rod of the electro-hydraulic push rod. The trigger head can be adjusted along the axial direction of the electro-hydraulic push rod and is arranged on the mounting seat. The reset assembly is arranged at both ends of the trigger head to keep the trigger head in the middle position of the adjustment stroke.

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