A pull rod warning device for hydraulic press

Abstract

The utility model discloses a pull rod warning device for a hydraulic press, including: a lower beam, a column and an upper beam; the upper and lower ends of the column are respectively fitted with one end of the upper beam and the lower beam, and the column is connected with the lower beam and the upper beam through the pull rod; it also includes a preload body, a preload pad and a preload nut. It is to solve the problems mentioned in the background technology that the preload pad has a small force area, uneven force, and the preload nut is often stuck due to the overall structure of the preload nut; the preload single-acting structure may be used in over-travel, increasing safety hazards; the mechanical reset of the preload requires manual eccentric striking of the plunger with a hammer, damaging the outer surface of the preload, and the eccentric force makes the preload seal ring easy to get stuck, resulting in low work efficiency, high labor intensity for workers, and high maintenance costs.

Description

Technical Field

[0001] The utility model relates to the technical field of drawbar warning technology, in particular to a drawbar warning device for a hydraulic press. Background Art

[0002] A hydraulic press is a mechanical device that uses liquid to transfer energy to achieve work. It uses liquid (usually oil) to transfer pressure and force in a closed system and completes various work tasks by controlling the flow of liquid. The pull rod warning device of a hydraulic press is a safety protection device, which is mainly used to monitor the position of the pull rod during the operation of the hydraulic press to provide early warning signals, avoid accidents and protect the safety of equipment and operators. The position or movement of the pull rod is monitored through sensors or switches. When the position or movement of the pull rod exceeds the set safety range, an alarm or shutdown signal will be triggered to prompt the operator to take timely measures to avoid possible risks and accidents.

[0003] However, it still has the following disadvantages in actual use:

[0004] The traditional split tie rod frame hydraulic press's tie rod preload: the preload block uses 4-6 small diameter cylinders placed on the upper beam, the preloader is placed on the preload block, the tie rod protrudes from the preloader part and then the preload nut is screwed on. The preload block has a small force area and uneven force, and the preload nut often gets stuck due to the overall structure of the preload nut. The preload nut has a single-acting structure and may be used in an over-travel manner, increasing safety hazards. The mechanical reset of the preloader requires manual eccentric striking of the plunger with a hammer, which damages the outer surface of the preloader, and the eccentric force makes the preload seal ring easy to get stuck, resulting in low work efficiency, high labor intensity for workers, and high maintenance costs. Utility Model Content

[0005] Technical solutions to be solved

[0006] The purpose of the utility model is to provide a pull rod warning device for a hydraulic press, so as to solve the problems proposed in the above-mentioned background technology that the force bearing area of ​​the preload pad is small, the force is uneven, and the preload nut is often stuck due to the overall structure of the preload nut; the preload device has a single-acting structure, which may be used over the stroke, increasing the safety hazard; the mechanical reset of the preload device requires manual eccentric striking of the plunger with a hammer, damaging the outer surface of the preload device, and the eccentric force makes the preload device sealing ring easy to get stuck, resulting in low work efficiency, high labor intensity for workers, and high maintenance costs.

[0007] Technical Solution

[0008] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0009] The utility model is a pull rod early warning device for a hydraulic press, comprising:

[0010] Lower beams, columns and upper beams;

[0011] The upper and lower ends of the column are respectively fitted with one end of the upper beam and the lower beam, and the column is connected to the lower beam and the upper beam through a tie rod;

[0012] It also includes a preload body, a preload spacer and a preload nut;

[0013] The pretensioner body is sleeved on the upper end of the pull rod, the pretensioning pad is fixed on the outer surface of the pull rod, and the upper surface is in contact with the bottom surface of the pretensioner body, and the lower surface is in contact with the upper surface of the fastening nut;

[0014] Specifically, by setting a pre-tightening pad, the pre-tightening pad adopts a welded part, the upper and lower force-bearing areas of the pad are increased, there is no uneven force, and the welding structure effectively avoids the tightening position of the side nut;

[0015] The pretensioner body comprises a pretensioner cylinder, a pretensioner piston rod, an induction magnetic ring, a pretensioner gland, and a guide column;

[0016] The pretensioner piston rod is slidably connected to one end of the pretensioner cylinder body, the pretensioner gland is threadedly connected to the pretensioner cylinder body through a gland screw, and a sealing ring is embedded and connected at the connection between the pretensioner gland and the pretensioner cylinder body;

[0017] The upper surface of the pretensioner piston rod is fixedly connected with a built-in displacement sensor, and the front end of the built-in displacement sensor is fixedly connected with an induction magnetic ring;

[0018] Specifically, by setting a built-in displacement sensor, the built-in displacement sensor monitors the position of the pretensioner piston rod in real time, and the upper and lower movement limit positions can be set on the electronic control to ensure that the piston rod moves within the effective range, thereby extending the service life of the entire device.

[0019] Furthermore, the pull rods are distributed at the four corners of the column, and the upper and lower ends of the column are threadedly connected with fastening nuts;

[0020] Specifically, by providing the fastening nuts, the columns, the upper beam and the lower beam can be effectively connected together, thereby ensuring the stability of the connection among the columns, the upper beam and the lower beam.

[0021] Further, the preload nut is threadedly connected to the top of the pull rod, and the lower surface is in contact with the upper surface of the preload body;

[0022] Specifically, by providing a pre-tightening nut, the pre-tightening nut adopts a split structure, which is convenient for installation and disassembly and reduces the labor intensity of workers.

[0023] Furthermore, a guide column is fixedly connected to one end of the upper surface of the pretensioner piston rod, a pretensioner oil inlet is opened on one side of the outer surface of the pretensioner cylinder body, and a pretensioner oil return port is opened on one side of the outer surface of the pretensioner gland;

[0024] The upper end of the guide post is slidably connected in the pretensioner gland;

[0025] Specifically, by providing a pre-tightening oil inlet port and a pre-tightening oil return port, the hydraulic pressure of the device can be automatically returned to the original position.

[0026] Beneficial Effects

[0027] Compared with the prior art, the advantages of the present invention are:

[0028] The utility model adopts a welded part for the pre-tightening pad, a pre-tightening nut, a built-in displacement sensor and a guide column. The upper and lower force-bearing areas of the pad are increased, and there is no uneven force. The welding structure effectively avoids the tightening position of the side nut. The pre-tightening nut and the nut adopt a split structure, which is convenient for installation and disassembly, and the labor intensity of workers is reduced. The pre-tightening device has a double-acting structure, a guide anti-rotation device is arranged inside, and a built-in displacement sensor is installed on the top. The hydraulic pressure automatically returns to the original position, and there is no overtravel. The working pressure and stroke of the pre-tightening device are monitored, and the safety and work efficiency are greatly improved. The degree of automation is high and the maintenance cost is low.

[0029] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0032] Figure 2 It is a schematic diagram of the local structure of the utility model;

[0033] Figure 3 This is an enlarged view of the internal structure of the pretensioner body of the utility model.

[0034] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0035] 1. Lower beam; 2. Pull rod; 3. Column; 4. Upper beam; 5. Fastening nut; 6. Preloader body; 7. Preloader pad; 8. Preloader nut; 9. Preloader cylinder; 10. Preloader piston rod; 11. Sealing ring; 12. Built-in displacement sensor; 13. Induction magnetic ring; 14. Cover screw; 15. Preload oil inlet; 16. Preloader cover; 17. Preload oil return port; 18. Guide column. DETAILED DESCRIPTION

[0036] 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 with reference to the accompanying drawings.

[0037] 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 implementation methods disclosed below.

[0038] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0039] Example

[0040] See also Figure 1-3 As shown, this embodiment is a pull rod warning device for a hydraulic press, comprising:

[0041] Lower beam 1, column 3 and upper beam 4;

[0042] The upper and lower ends of the column 3 are respectively fitted with one end of the upper beam 4 and the lower beam 1, and the column 3 is connected with the lower beam 1 and the upper beam 4 through the tie rod 2;

[0043] It also includes a preloader body 6 , a preload pad 7 and a preload nut 8 .

[0044] The pull rods 2 are distributed at the four corners of the column 3, and the upper and lower ends of the column 3 are threadedly connected with fastening nuts 5;

[0045] The pretensioner body 6 is sleeved on the upper end of the tie rod 2, and the pretensioning pad 7 is fixed on the outer surface of the tie rod 2, and the upper surface is in contact with the bottom surface of the pretensioner body 6, and the lower surface is in contact with the upper surface of the fastening nut 5;

[0046] The preload nut 8 is threadedly connected to the top of the pull rod 2, and the lower surface is in contact with the upper surface of the preload body 6;

[0047] The pretensioner body 6 includes a pretensioner cylinder 9, a pretensioner piston rod 10, an induction magnetic ring 13, a pretensioner gland 16, and a guide column 18;

[0048] The pretensioner piston rod 10 is slidably connected to one end of the pretensioner cylinder 9, the pretensioner gland 16 is threadedly connected to the pretensioner cylinder 9 through the gland screw 14, and the connection between the pretensioner gland 16 and the pretensioner cylinder 9 is embedded with a sealing ring 11;

[0049] A built-in displacement sensor 12 is fixedly connected to the upper surface of the pretensioner piston rod 10, and an induction magnetic ring 13 is fixedly connected to the front end of the built-in displacement sensor 12;

[0050] A guide column 18 is fixedly connected to one end of the upper surface of the pretensioner piston rod 10, a pretensioner oil inlet 15 is opened on one side of the outer surface of the pretensioner cylinder body 9, and a pretensioner oil return port 17 is opened on one side of the outer surface of the pretensioner gland 16;

[0051] The upper end of the guide post 18 is slidably connected in the pretensioner gland 16;

[0052] When used specifically:

[0053] First, pass the tie rod 2 through the lower beam 1 and fix it with the fastening nut 5 at the bottom, then fit the column 3 on the tie rod 2, fit the upper beam 4 on the tie rod 2, and thread it on the tie rod 2 with the fastening nut 5 to fix the three together;

[0054] Then, the pretensioner body 6 is sleeved on the outer surface of the tie rod 2, and the top is tightened by the pretensioning nut 8;

[0055] The pretensioner body 6 is composed of a pretensioner cylinder 9, a pretensioner piston rod 10, a pretensioner gland 16, a guide column 18, a built-in displacement sensor 12, an induction magnetic ring 13, a gland screw 14 and a sealing ring 11. The built-in displacement sensor 12 monitors the position of the pretensioner piston rod 10 in real time, and the upper and lower movement limit positions can be set on the electronic control to ensure that the pretensioner piston rod 10 moves within the effective range, thereby extending the service life of the entire device.

[0056] This setting can improve safety and work efficiency, increase the degree of automation and reduce maintenance costs.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A pull rod warning device for a hydraulic press, characterized in that: include: A lower beam (1), a column (3) and an upper beam (4); The upper and lower ends of the column (3) are respectively fitted with one end of the upper beam (4) and the lower beam (1), and the column (3) is connected to the lower beam (1) and the upper beam (4) through a pull rod (2); It also includes a preload body (6), a preload pad (7) and a preload nut (8); The pretensioner body (6) is sleeved on the upper end of the pull rod (2), and the pretensioner pad (7) is fixed on the outer surface of the pull rod (2), and the upper surface is in contact with the bottom surface of the pretensioner body (6), and the lower surface is in contact with the upper surface of the fastening nut (5); The pretensioner body (6) comprises a pretensioner cylinder (9), a pretensioner piston rod (10), an induction magnetic ring (13), a pretensioner gland (16), and a guide column (18); The pretensioner piston rod (10) is slidably connected to one end of the pretensioner cylinder (9), the pretensioner gland (16) is threadedly connected to the pretensioner cylinder (9) via a gland screw (14), and a sealing ring (11) is embedded and connected at the connection between the pretensioner gland (16) and the pretensioner cylinder (9); A built-in displacement sensor (12) is fixedly connected to the upper surface of the pretensioner piston rod (10), and an induction magnetic ring (13) is fixedly connected to the front end of the built-in displacement sensor (12).

2. A pull rod warning device for a hydraulic press according to claim 1, characterized in that: The pull rods (2) are distributed at the four corners of the column (3), and the upper and lower ends of the column (3) are threadedly connected with fastening nuts (5).

3. A pull rod warning device for a hydraulic press according to claim 1, characterized in that: The pre-tightening nut (8) is threadedly connected to the top end of the pull rod (2), and the lower surface is in contact with the upper surface of the pre-tightening device body (6).

4. A pull rod warning device for a hydraulic press according to claim 1, characterized in that: A guide column (18) is fixedly connected to one end of the upper surface of the pretensioner piston rod (10), a pretensioner oil inlet (15) is provided on one side of the outer surface of the pretensioner cylinder body (9), and a pretensioner oil return port (17) is provided on one side of the outer surface of the pretensioner gland (16); The upper end of the guide post (18) is slidably connected in the pretensioner gland (16).

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