Protective cover

Abstract

The utility model relates to a protective cover which comprises a cover body with a door opening formed in one side, an upper through hole for a hydraulic machine pressure plate to penetrate through is formed in the top wall of the cover body, a lower through hole for a hydraulic machine pressure bearing table to penetrate through is formed in the bottom wall of the cover body, and two supporting baffles are symmetrically installed on the inner wall of the cover body. Proximity switches are fixedly connected to the upper surfaces of the two supporting baffles, and due to the fact that the horizontal distance between the proximity switches and the side wall of the hydraulic machine pressing plate is smaller than the limit triggering distance of the proximity switches, when the hydraulic machine pressing plate moves downwards to be located on the same horizontal plane with the proximity switches, the proximity switches can be triggered to disconnect the electromagnets and an external power source; at the moment, the electromagnet is powered off and loses magnetism, the cover door immediately slides down to be closed under the action of self gravity, manual closing by a user is not needed, and the protection safety is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic press protection, and particularly relates to a protective cover. Background Art

[0002] When a hydraulic press is undergoing a compressive strength test, in order to prevent the flying debris from damaging the hydraulic press body and the test personnel when the specimen breaks under the ultimate pressure, it is generally necessary to install a protective cover around the pressure plate and pressure table of the hydraulic press to protect the hydraulic press and the test personnel from injury.

[0003] The protective cover of the hydraulic press is generally equipped with a cover door. Before the test, the user opens the cover door and places the test piece on the pressure platform. After closing the cover door, the hydraulic press is started to drive the pressure plate to press the test piece for compressive strength test. The existing protective cover door generally needs to be closed manually. If the tester forgets to close the cover door during the test, the test piece fragments may splash out from the door hole of the protective cover, causing harm to the experimenter and the hydraulic press, which poses certain safety hazards. Utility Model Content

[0004] The purpose of the present invention is to provide a protective cover with a simple structure and reasonable design in order to solve the above problems.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A protective cover comprises a cover body with a door opening on one side, the top wall of the cover body is provided with an upper through hole for the hydraulic press pressure plate to pass through, the bottom wall of the cover body is provided with a lower through hole for the hydraulic press pressure platform to pass through, two support baffles are symmetrically installed on the inner wall of the cover, the upper surfaces of the two support baffles are fixedly connected to proximity switches, the horizontal spacing between the proximity switches and the side walls of the hydraulic press pressure plate is less than the limit trigger spacing of the proximity switches, guide bars are fixedly connected to the outer walls on the left and right sides of the door opening, the adjacent sides of the two guide bars are provided with a slide groove, a cover door is provided between the two guide bars, the two sides of the cover door are slidably connected to the two guide bars through the slide groove, the left and right sides of the bottom end of the cover door are fixedly connected to iron plates, the outer walls of the top ends of the two guide bars are fixedly connected to electromagnets, and the electromagnets are electrically connected to the proximity switches and the external controller.

[0007] As a further optimization scheme of the present invention, downwardly inclined slopes are provided on the bottom wall of the cover body on the left and right sides of the lower through hole, and collection boxes are penetrated on the left and right sides of the bottom of the cover body, and the open end of the collection box passes through the bottom wall of the cover body and is clamped with the bottom wall of the cover body.

[0008] As a further optimization solution of the present invention, the support baffle is a rectangular plate-shaped structure, and the width of the support baffle is greater than the width of the proximity switch.

[0009] As a further optimization solution of the present invention, a sealing plate is provided between the bottom ends of the two guide bars, the two ends of the sealing plate are respectively fixed to the two guide bars, and the top height of the sealing plate is flush with the bottom wall height of the inner cavity of the cover.

[0010] As a further optimization solution of the present invention, according to the protective cover described in the claim, the top end of the cover door is provided with a rubber sleeve with an annular structure, and a handle is fixedly connected to the outer wall of the middle section of the cover door.

[0011] As a further optimization solution of the present invention, after the electromagnet is energized, the magnetic attraction force between the electromagnet and the iron plate is greater than the total gravity of the cover door and the rubber sleeve.

[0012] The beneficial effect of the present utility model is that: since the horizontal spacing between the proximity switch and the side wall of the hydraulic press pressure plate is smaller than the limit trigger spacing of the proximity switch, when the hydraulic press pressure plate moves down to the same horizontal plane as the proximity switch, the proximity switch will be triggered to disconnect the electromagnet from the external power supply. At this time, the electromagnet is powered off and loses its magnetism, and the cover door immediately slides down and closes under the action of its own gravity, without the need for the user to manually close it, thereby greatly improving the safety of protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of the cover body of the utility model;

[0015] Figure 3 This is a schematic diagram of the installation structure of the iron plate, handle, rubber sleeve and cover door of the utility model;

[0016] Figure 4 It is a schematic diagram of the cross-sectional structure of the cover body of the present invention.

[0017] In the figure: 1. cover body; 2. door opening; 3. upper through hole; 4. lower through hole; 5. inclined surface; 6. collection box; 7. support baffle; 8. proximity switch; 9. guide strip; 10. sealing plate; 11. slide groove; 12. cover door; 13. rubber sleeve; 14. handle; 15. iron plate; 16. electromagnet. DETAILED DESCRIPTION

[0018] The present application is described in further detail below in conjunction with the accompanying drawings. It is necessary to point out that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technicians in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0019] Example 1

[0020] like Figure 1 - Figure 3 As shown, a protective cover includes a cover body 1 with a door opening 2 on one side, an upper through hole 3 for the hydraulic press pressure plate to pass through is opened on the top wall of the cover body 1, and a lower through hole 4 for the hydraulic press pressure platform to pass through is opened on the bottom wall of the cover body 1;

[0021] Two support baffles 7 are symmetrically mounted on the inner wall of the cover 1. The support baffles 7 are rectangular plate-shaped structures. A proximity switch 8 is fixedly connected to the upper surface of the two support baffles 7. The width of the support baffles 7 is greater than the width of the proximity switch 8. Since the support baffles 7 block the fragments flying when the test piece below is broken, the problem of the test piece fragments hitting the proximity switch 8 and causing damage to the proximity switch 8 is avoided as much as possible. The horizontal distance between the proximity switch 8 and the side wall of the hydraulic press platen is less than the limit trigger distance of the proximity switch 8.

[0022] Guide strips 9 are fixedly connected to the outer walls on both sides of the door opening 2. A sealing plate 10 is provided between the bottom ends of the two guide strips 9. Both ends of the sealing plate 10 are fixed to the two guide strips 9. The top height of the sealing plate 10 is flush with the bottom wall height of the inner cavity of the cover body 1. A sliding groove 11 is provided on the adjacent side of the two guide strips 9. A cover door 12 is provided between the two guide strips 9. Both sides of the cover door 12 are slidably connected to the two guide strips 9 through the sliding groove 11. When the cover door 12 slides down to fit with the sealing plate 10, the door opening 2 can be sealed.

[0023] A rubber sleeve 13 with an annular structure is provided on the top of the cover door 12, a handle 14 is fixedly connected to the outer wall of the middle section of the cover door 12, iron plates 15 are fixedly connected on the left and right sides of the bottom end of the cover door 12, and electromagnets 16 are fixedly connected to the outer walls of the top ends of the two guide bars 9, and the electromagnets 16 are electrically connected to the proximity switch 8 and the external controller.

[0024] It should be noted that, when the test piece needs to be tested for its compressive performance, the cover door 12 can be lifted up by the handle 14 along the height direction of the slide groove 11 to slide the cover door 12 upward. When the iron plates 15 fixed on both sides of the bottom of the cover door 12 slide to align with the electromagnet 16, the electromagnet 16 can fix the cover door 12 by magnetically adsorbing the cover door 12. At this time, the user can place the test piece to be tested on the hydraulic press pressure platform above the lower through hole 4, and then start the hydraulic press to push the hydraulic press pressure plate downward. Since the horizontal distance between the proximity switch 8 and the side wall of the hydraulic press pressure plate is smaller than the contact The limit trigger distance of the proximity switch 8 is that when the hydraulic press pressure plate moves down to the same horizontal plane as the proximity switch 8, the proximity switch 8 is immediately triggered, and the proximity switch 8 sends a signal to the external controller, so that the external controller disconnects the electromagnet 16 from the external power supply. At this time, the electromagnet 16 is powered off and loses its magnetism, and the cover door 12 immediately slides down and closes under the action of its own gravity, sealing the door opening opened on the cover body 1, and avoiding the need to manually close the cover door 12. If the tester forgets to close the cover door 12 during the test, specimen fragments may splash out from the door opening 2 of the cover body 1, posing a certain safety hazard.

[0025] Example 2

[0026] like Figure 4 As shown, a protective cover is provided, with downwardly inclined slopes 5 on the bottom wall of the cover body 1 on both sides of the lower through hole 4, and collection boxes 6 are penetrated on both sides of the bottom of the cover body 1. The open end of the collection box 6 passes through the bottom wall of the cover body 1 and is clamped with the bottom wall of the cover body 1, including a cover body 1 with a door hole 2 on one side, an upper through hole 3 for the hydraulic press pressure plate to pass through is provided on the top wall of the cover body 1, and a lower through hole 4 for the hydraulic press pressure platform to pass through is provided on the bottom wall of the cover body 1. Two support baffles 7 are symmetrically installed on the inner wall of the cover body 1, and the upper surfaces of the two support baffles 7 are fixedly connected to proximity switches 8. The horizontal spacing between the proximity switch 8 and the side wall of the hydraulic press pressure plate is smaller than the limit trigger spacing of the proximity switch 8. Guide bars 9 are fixedly connected to the left and right outer walls of the door opening 2. A slide groove 11 is provided on the adjacent side of the two guide bars 9. A cover door 12 is provided between the two guide bars 9. The two sides of the cover door 12 are slidingly connected to the two guide bars 9 through the slide groove 11. Iron plates 15 are fixedly connected to the left and right sides of the bottom end of the cover door 12. Electromagnets 16 are fixedly connected to the outer walls of the top ends of the two guide bars 9. The electromagnet 16 is electrically connected to the proximity switch 8 and the external controller.

[0027] It should be noted that, for this type of protective cover, when the specimen shatters due to the extreme pressure inside the cover body 1, the flying fragments are blocked by the inner wall of the cover body 1 and fall on the bottom wall of the inner cavity of the cover body 1. Since the bottom wall of the cover body 1 is provided with a downward inclined surface 5, the fragments slide down along the inclined surface 5 under the action of their own gravity and finally fall into the collection box 6 for collection, which makes it convenient for the experimenter to clean up the fragments.

[0028] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A protective cover, comprising a cover body (1) with a door opening (2) formed on one side, an upper through hole (3) formed on the top wall of the cover body (1) for a hydraulic press pressure plate to pass through, and a lower through hole (4) formed on the bottom wall of the cover body (1) for a hydraulic press pressure platform to pass through, characterized in that: Two support baffles (7) are symmetrically installed on the inner wall of the cover body (1), and the upper surfaces of the two support baffles (7) are fixedly connected with a proximity switch (8). The horizontal spacing between the proximity switch (8) and the side wall of the hydraulic press pressure plate is less than the limit trigger spacing of the proximity switch (8). Guide bars (9) are fixedly connected to the left and right outer walls of the door opening (2), and a slide groove (11) is provided on the adjacent side of the two guide bars (9). A cover door (12) is provided between the two guide bars (9), and the two sides of the cover door (12) are respectively slidably connected to the two guide bars (9) through the slide groove (11). The left and right sides of the bottom end of the cover door (12) are fixedly connected with an iron plate (15), and the top outer walls of the two guide bars (9) are fixedly connected with an electromagnet (16), and the electromagnet (16) is electrically connected to the proximity switch (8) and an external controller.

2. A protective cover according to claim 1, characterized in that: A downwardly inclined slope (5) is provided on the bottom wall of the cover body (1) on both the left and right sides of the lower through hole (4), and a collection box (6) is provided on both the left and right sides of the bottom of the cover body (1), and the open end of the collection box (6) passes through the bottom wall of the cover body (1) and is clamped with the bottom wall of the cover body (1).

3. The protective cover according to claim 1, characterized in that: The support baffle (7) is a rectangular plate-shaped structure, and the width of the support baffle (7) is greater than the width of the proximity switch (8).

4. The protective cover according to claim 1, characterized in that: A sealing plate (10) is provided between the bottom ends of the two guide bars (9), and both ends of the sealing plate (10) are respectively fixed to the two guide bars (9), and the top height of the sealing plate (10) is flush with the bottom wall height of the inner cavity of the cover body (1).

5. The protective cover according to claim 1, characterized in that: The top end of the cover door (12) is sleeved with a rubber sleeve (13) in an annular structure, and a handle (14) is fixedly connected to the outer wall of the middle section of the cover door (12).

6. The protective cover according to claim 5, characterized in that: After the electromagnet (16) is energized, the magnetic attraction force between the electromagnet (16) and the iron plate (15) is greater than the total weight of the cover door (12) and the rubber sleeve (13).

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