Stroke indicating device mounting structure with limit switch under sealing condition

Abstract

The utility model discloses a mounting structure of a stroke indicating device with a limit switch under a sealing condition, which comprises a sealing rack, the sealing rack is mounted on a shell of an output end of a cylinder body of a hydraulic hoist, a body of the cylinder body is positioned on one side of the sealing rack, and the limit switch is mounted on the sealing rack. A piston rod and a hanging head in the cylinder body operate on the other side of the sealing rack, and a stroke indicating device is mounted on the cylinder body; the stroke indicating device comprises a hollow fixed ruler, a movable ruler, a pointer and a stroke scale, the fixed ruler is fixedly installed on the cylinder body, the movable ruler is inserted into the fixed ruler in a penetrating mode, and one end of the movable ruler penetrates through a hole of a sealing support on the sealing rack to be connected with the hanging head and synchronously moves along with the hanging head; according to the utility model, the actual working stroke of the hydraulic hoist running in the deepwater machine room can be intuitively reflected, and shutdown protection can be obtained when the working stroke reaches the limit position, so that an over-limit destructive accident is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil cylinder matching structures, in particular to an installation structure of a travel indicating device with a limit switch under sealing conditions. Background Art

[0002] Safety is one of the necessary conditions for the survival and development of an enterprise, the basic guarantee of life and health, and the basic guarantee of property safety. Whether it is a hydraulic gate hoist in hydropower engineering or a hydraulic gate hoist in water conservancy engineering, the latest version of the design specification clearly states that a reliable travel limit switch should be set at the working stroke limit position of the hydraulic cylinder to avoid accidents caused by over-limit operation of the equipment.

[0003] The swing limit switch of the existing hydraulic gate hoist has low repetition accuracy. A small angle difference will cause a large stroke change, which cannot provide effective safety protection. Although the open straight-through pull rod device is simple, its use environment is limited. It can only be used in an environment without water and without sealed isolation. Therefore, it is necessary to develop a new supporting installation structure that can not only meet the use conditions of sealed installation, but also observe the stroke of the oil cylinder, and set a reliable stroke limit switch at the limit position of the working stroke. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to overcome the deficiencies in the prior art, a travel indicating device installation structure with a limit switch used under sealed conditions is provided.

[0005] The technical solution adopted by the utility model to solve the technical problem is: a travel indicating device installation structure with a limit switch under sealed conditions, comprising a sealed frame, the sealed frame is installed on the outer shell of the output end of the cylinder body of the hydraulic hoist, the main body of the cylinder body is located on one side of the sealed frame, the piston rod and the hanging head in the cylinder body run on the other side of the sealed frame, and the stroke indicating device is installed on the cylinder body;

[0006] The stroke indicating device comprises a hollow fixed ruler, a movable ruler, a pointer and a stroke scale, wherein the fixed ruler is fixedly mounted on the cylinder body, the movable ruler is inserted into the fixed ruler, and one end of the movable ruler passes through the hole of the sealing support on the sealing frame to be connected to the hanging head and moves synchronously with the hanging head;

[0007] The travel scale is installed on the front side of the fixed scale, the pointer is installed on the upper end of the movable scale, and a travel limit switch group is also arranged on the rear side of the fixed scale.

[0008] Furthermore, the travel limit switch group described in the utility model includes two independent travel limit switches respectively arranged at different left and right positions on the fixed length;

[0009] According to the actual limit position requirements, just set the positions of the two travel limit switches in advance.

[0010] The accompanying sensing device installed on the moving ruler triggers the corresponding travel limit switch at the corresponding position, which can cooperate with the circuit to send a signal to prevent the hydraulic cylinder from exceeding the limit and damaging the equipment and causing an accident.

[0011] Furthermore, the travel limit switch of the utility model is installed on the fixed length through a switch connecting plate, and the travel limit switch is arranged in an adjustment slot on the switch connecting plate;

[0012] The travel limit switch can achieve fine adjustment of the left and right position in the adjustment slot.

[0013] Furthermore, the fixed ruler of the utility model has a long slot on the upper side, and the movable ruler has a pointer connecting plate extending out of the long slot installed on the upper end, and the pointer is set in the adjusting slot of the pointer connecting plate through an adjusting bolt;

[0014] The pointer can be moved forward parallel to the travel scale through a connecting plate with a bending angle without affecting its movement with the moving scale. The pointer can also be fine-tuned in the adjustment slot of the pointer connecting plate.

[0015] The beneficial effects of the utility model are as follows: the installation structure of the utility model enables the actual working stroke of the hydraulic gate hoist running in the deep-water machine room to be intuitively reflected, and when the working stroke limit position is reached, the limit switch can send an electric control signal to obtain shutdown protection, thereby avoiding the hydraulic cylinder from over-limit operation and damaging the equipment and causing accidents. Moreover, the utility model device and the hydraulic cylinder body are detachable and separable structures, which are relatively convenient for transportation, maintenance, replacement, etc. The indicating part and the electrical part are not submerged in water, and there is no requirement for the waterproof level. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] Figure 2 yes Figure 1 Enlarged view of point A in .

[0019] Numbers in the figure: 1. Sealing frame, 2. Cylinder body, 3. Piston rod, 4. Lifting head, 5. Fixed scale, 6. Moving scale, 7. Pointer, 8. Travel scale, 9. Travel limit switch, 10. Switch connecting plate, 11. Pointer connecting plate, 12. Adjusting bolt. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 and Figure 2 The illustrated installation structure of a travel indicating device with a limit switch under sealed conditions comprises a sealed frame 1, which is mounted on a housing at the output end of a cylinder 2 of a hydraulic gate hoist, the main body of the cylinder 2 is located on one side of the sealed frame 1, the piston rod 3 and the hanging head 4 in the cylinder 2 run on the other side of the sealed frame 1, and a travel indicating device is mounted on the cylinder 2;

[0022] The stroke indicating device comprises a hollow fixed ruler 5, a movable ruler 6, a pointer 7 and a stroke scale 8. The fixed ruler 5 is fixedly mounted on the cylinder body 2, the movable ruler 6 is inserted into the fixed ruler 5, one end of the movable ruler 6 passes through the hole of the sealing support on the sealing frame 1, is connected to the hanging head 4 and moves synchronously with the hanging head 4.

[0023] The travel scale 8 is installed on the front side of the fixed scale 5, the pointer 7 is installed on the upper end of the movable scale 6, and a travel limit switch group is also arranged on the rear side of the fixed scale 5.

[0024] The travel limit switch group includes two independent travel limit switches 9 respectively arranged at different left and right positions on the fixed length 5; the positions of the two travel limit switches can be set in advance according to the actual limit position requirements.

[0025] The accompanying sensing device installed on the moving ruler triggers the corresponding travel limit switch at the corresponding position, which can cooperate with the circuit to send a signal to prevent the hydraulic cylinder from exceeding the limit and damaging the equipment and causing an accident.

[0026] The travel limit switch 9 is installed on the fixed length 5 through the switch connecting plate 10, and the travel limit switch 9 is arranged in the adjustment groove on the switch connecting plate 10; the travel limit switch can realize the fine adjustment of the left and right position in the adjustment groove.

[0027] A long slot is provided on the upper side of the fixed ruler 5, and a pointer connecting plate 11 extending out of the long slot is installed on the upper end of the movable ruler 6. The pointer 7 is set in the adjustment slot of the pointer connecting plate 11 through an adjusting bolt 12; the pointer can be parallel to the travel scale by a connecting plate with a bending angle without affecting its movement with the movable ruler, and the pointer can also be fine-tuned in the adjustment slot of the pointer connecting plate.

[0028] Working principle:

[0029] Under the action of the sealed frame structure, a dry-wet separated working environment is created. The lifting head and piston rod of the hydraulic gate hoist work deep underwater on one side of the sealed frame, and there is no water on the other side of the sealed frame. In this state, the movable ruler in the stroke indicating device moves synchronously with the lifting head, and the hydraulic cylinder stroke can be intuitively indicated by the pointer on the upper end of the movable ruler. Since the movable ruler and the lifting head move synchronously, the pointer on the upper end of the movable ruler points to the actual stroke of the gate hoist, which will not be enlarged or reduced; a reliable stroke limit switch is set on the fixed scale according to the working stroke limit position of the hydraulic cylinder, and the accompanying sensing device set on the movable ruler triggers the corresponding stroke limit switch at the corresponding position to avoid accidents caused by over-limit operation of the hydraulic cylinder and damage to equipment.

[0030] With this design, the actual working stroke of the hydraulic gate hoist operating in the deepwater machine room can be intuitively reflected, and the machine can be shut down for protection when reaching the limit position of the working stroke, thus avoiding destructive accidents caused by over-limit.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A travel indicating device installation structure with a limit switch for use under sealed conditions, characterized in that: The invention comprises a sealing frame (1), wherein the sealing frame (1) is mounted on the outer shell of the output end of the cylinder body (2) of the hydraulic gate hoist, the main body of the cylinder body (2) is located on one side of the sealing frame (1), the piston rod (3) and the hanging head (4) in the cylinder body (2) run on the other side of the sealing frame (1), and the cylinder body (2) is mounted with a stroke indicating device; The stroke indicating device comprises a hollow fixed ruler (5), a movable ruler (6), a pointer (7) and a stroke scale (8); the fixed ruler (5) is fixedly mounted on the cylinder body (2); the movable ruler (6) is inserted into the fixed ruler (5); one end of the movable ruler (6) passes through a hole of a sealing support on the sealing frame (1) to be connected to the hanging head (4) and moves synchronously with the hanging head (4); The travel scale (8) is installed on the front side of the fixed scale (5), the pointer (7) is installed on the upper end of the movable scale (6), and a travel limit switch group is also arranged on the rear side of the fixed scale (5).

2. The installation structure of the travel indicating device with a limit switch for use under sealed conditions according to claim 1, characterized in that: The travel limit switch group comprises two independent travel limit switches (9) which are respectively arranged at different left and right positions on the fixed length (5).

3. The installation structure of the travel indicating device with a limit switch for use under sealed conditions according to claim 2, characterized in that: The travel limit switch (9) is installed on the fixed length (5) via a switch connecting plate (10), and the travel limit switch (9) is arranged in an adjustment groove on the switch connecting plate (10).

4. The installation structure of the travel indicating device with a limit switch for use under sealed conditions according to claim 1, characterized in that: The fixed ruler (5) has a long slot on its upper side, the movable ruler (6) has a pointer connecting plate (11) mounted on its upper end extending out of the long slot, and the pointer (7) is arranged in the adjusting slot of the pointer connecting plate (11) via an adjusting bolt (12).

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