Fire hose bending test frame

Abstract

The utility model discloses a fire hose bending test frame which comprises a placing table, a U-shaped top plate is fixedly arranged on the placing table, clamping plates are arranged at the top ends of the two opposite sides of the U-shaped top plate through hinges, the clamping plates and the U-shaped top plate are matched to clamp a water hose sample in a bent state, and connecting rods are fixedly arranged at the bottoms of the clamping plates. A containing groove matched with the connecting rod is formed in the containing table, a limiting groove is formed in one side of the connecting rod, a sliding groove is formed in the containing table, a limiting rod is arranged in the sliding groove in a sliding mode, one end of the limiting rod is matched with the limiting groove to be used for limiting the clamping plate, and a rack is fixedly arranged at the other end of the limiting rod. A rotating shaft is rotatably arranged in the placement table, a gear is fixedly arranged on the outer surface of the rotating shaft and is engaged with the racks, and the top of the rotating shaft extends to the outside of the placement table and is fixedly provided with a rotating handle, so that the situation that a water hose sample shakes and is separated from the placement table when water with pressure is introduced into the water hose sample is prevented, test interruption is avoided, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of test stands, in particular to a fire hose bending test stand. Background Art

[0002] Fire hoses are hoses used to transport flame-retardant liquids such as high-pressure water or foam. Traditional fire hoses are lined with rubber and wrapped with linen braids on the outer surface. Advanced fire hoses are made of polymer materials such as polyurethane. There are metal joints at both ends of the fire hose, which can be connected to another hose to extend the distance or connected to a nozzle to increase the liquid injection pressure. Before the fire hose is put into use, its bending performance needs to be tested. When the fire hose is tested for bending performance, the hose sample to be tested is placed on the experimental device in a U-shaped card, and water is poured into the hose sample. The water presses the air in the sample to the exhaust solenoid valve, and the air is discharged from the exhaust hole. Then, when the pressure is evenly adjusted to 0.8MPa, observe whether there are obvious wrinkles on the inner side of the curved part and whether the hose sample is leaking, so as to obtain the test results of the hose sample bending. However, when the existing test stand is used for bending test of the fire hose, it is necessary to inject pressurized water into the fire hose, which causes the fire hose to shake easily, so that the fire hose is easy to detach from the test stand, interrupting the test process and reducing the test efficiency. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the existing defects and provide a fire hose bending test stand, which uses a clamping plate to limit the fire hose, improves the stability of the fire hose, and prevents the fire hose from detaching from the test stand, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fire hose bending test stand, comprising a placing table, on which a U-shaped top plate is fixedly arranged, and clamping plates are arranged at the top ends of the opposite sides of the U-shaped top plate through hinges, and the clamping plates cooperate with the U-shaped top plate to clamp a hose sample in a bent state, and limiting devices are arranged on the clamping plates and the placing table to limit the clamping plates at the same time, so as to prevent the hose sample from shaking and falling off the placing table when pressurized water is passed into the clamping plates, thereby avoiding interruption of the test and improving the test efficiency.

[0005] Furthermore, the limiting device includes a connecting rod, a limiting rod, a rack and a gear. The connecting rod is fixedly arranged at the bottom of the card plate, a receiving groove matching the connecting rod is opened on the placement table, a limiting groove is opened on one side of the connecting rod, a slide groove is arranged inside the placement table, a limiting rod is slidably arranged in the slide groove, one end of the limiting rod cooperates with the limiting groove to limit the card plate, and the other end of the limiting rod is fixedly provided with a rack. A rotating shaft is rotatably arranged inside the placement table, and a gear is fixedly arranged on the outer surface of the rotating shaft. The gears are respectively meshed with the racks, and the top of the rotating shaft extends to the outside of the placement table and is fixedly provided with a rotating handle to limit the card plate.

[0006] Furthermore, one end of the limiting rod that cooperates with the limiting groove is an inclined wedge structure, which facilitates the connecting rod to enter the accommodating groove.

[0007] Furthermore, a spring is fixedly provided at the other end of the rack, and the other end of the spring is fixedly connected to the slide slot. When the spring is in a natural state, one end of the limit rod having an inclined wedge structure is located in the limit slot, which facilitates the resetting of the limit rod.

[0008] Furthermore, the placement table is symmetrically provided with through holes, and bolts are threadedly connected to the through holes. The bolts are respectively fitted with the edges of the water hose samples in a bent state, so that the height of the bolts can be changed.

[0009] Furthermore, a handle is fixedly provided on the upper surface of the card board to facilitate flipping the card board.

[0010] Furthermore, support legs are fixedly and evenly arranged on the bottom of the placement table.

[0011] Compared with the prior art, the beneficial effects of the utility model are: a fire hose bending test stand has the following advantages:

[0012] When testing the water hose sample, set the water hose sample to a bent state, turn the handle clockwise to drive the gear to rotate, and the gear rotation drives the limit rod to move in the opposite direction through the rack, so that the limit rod is disengaged from the receiving groove, and then use the clamping plate to clamp the water hose sample, and the clamping plate drives the connecting rod to enter the receiving groove, and then turn the handle counterclockwise to drive the gear to rotate, and the gear rotation drives the limit rod to move in the opposite direction through the rack into the limit groove, and limit the clamping plate to prevent the water hose sample from shaking when it passes into pressurized water and thus leaving the placement table, thereby avoiding interruption of the test and improving the test efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a top view of the structure of the utility model;

[0014] Figure 2 This is an enlarged view of the structure A of the utility model;

[0015] Figure 3This is a front cross-sectional view of the structure of the utility model;

[0016] Figure 4 This is an enlarged view of structure B of the utility model;

[0017] Figure 5 It is the left view of the structure of the utility model.

[0018] In the figure: 1. placing table; 2. U-shaped top plate; 3. water hose sample; 4. clamping plate; 5. handle; 6. rotating shaft; 7. gear; 8. slide groove; 9. limit rod; 10. rack; 11. spring; 12. rotary handle; 13. connecting rod; 14. supporting leg; 15. limit groove; 16. bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0020] See also Figure 1-5 The utility model provides a technical solution: a fire hose bending test stand, including a placing table 1, the bottom of the placing table 1 is fixedly and evenly provided with supporting legs 14, and a universal wheel with a self-locking device can be arranged under the supporting legs 14 for easy movement, a U-shaped top plate 2 is fixedly arranged on the placing table 1, and a clamping plate 4 is arranged at the top of the opposite sides of the U-shaped top plate 2 through a hinge, and the clamping plate 4 can rotate around the top of the U-shaped top plate 2 for convenient clamping of the water hose sample 3, and a handle 5 is fixedly arranged on the upper surface of the clamping plate 4, and the handle 5 is used to facilitate the opening and closing of the clamping plate 4, and the clamping plate 4 cooperates with the U-shaped top plate 2 to clamp the water hose sample 3 in a bent state, and a limiting device for limiting the clamping plate 4 at the same time is arranged on the clamping plate 4 and the placing table 1.

[0021] Specifically, the limiting device includes a connecting rod 13, a limiting rod 9, a rack 10 and a gear 7. The connecting rod 13 is fixedly arranged at the bottom of the card plate 4. A receiving groove matching the connecting rod 13 is provided on the placement table 1. A limiting groove 15 is provided on one side of the connecting rod 13. A slide groove 8 is provided inside the placement table 1. The slide groove 8 is communicated with the receiving groove. A limiting rod 9 is slidably arranged in the slide groove 8. One end of the limiting rod 9 cooperates with the limiting groove 15 to limit the card plate 4. The other end of the limiting rod 9 is fixedly provided with a rack 10. A rotating shaft 6 is rotatably arranged inside the placement table 1. A gear 7 is fixedly provided on the outer surface of the moving shaft 6, and the gear 7 is respectively meshed with the rack 10. The top of the rotating shaft 6 extends to the outside of the placing table 1 and is fixedly provided with a handle 12. When limiting the clamping plate 4, the handle 12 is rotated clockwise to drive the rotating shaft 6 to rotate, and the rotating shaft 6 drives the rack 7 to move in opposite directions through the gear 7. The opposite movement of the rack 7 drives the limiting rod 9 to disengage from the receiving groove, and then the clamping plate 4 is used to clamp the water hose sample 3, and then the handle 12 is rotated counterclockwise to drive the limiting rod 9 to enter the limiting groove 15 to limit the connecting rod 13, thereby limiting the clamping plate 4.

[0022] Specifically, one end of the limit rod 9 that cooperates with the limit groove 15 is a wedge structure. When the connecting rod 13 enters the receiving groove, the connecting rod 13 can squeeze the limit rod 9 out of the receiving groove. When the connecting rod 13 completely enters the receiving groove, the handle 12 is rotated counterclockwise to make the limit rod 9 enter the limit groove 15.

[0023] Specifically, a spring 11 is fixedly provided at the other end of the rack 10, and the other end of the spring 11 is fixedly connected to the slide groove 8. When the spring 11 is in a natural state, one end of the limiting rod 9 which is a wedge structure is located in the limiting groove 15. By setting the spring 15, after the connecting rod 13 completely enters the accommodating groove, one end of the limiting rod 9 enters the limiting groove 9 under the reset force of the spring 15, and there is no need to rotate the handle 12.

[0024] Specifically, through holes are symmetrically arranged on the placement table 1, and bolts 16 are threadedly connected to the through holes. The bolts 16 are respectively fitted with the edges of the water hose sample 3 in the bent state. By tightening the bolts 16, the height of the bolts 16 can be adjusted according to the height of the water hose sample 3.

[0025] The working principle of a fire hose bending test stand provided by the utility model is as follows: when testing a hose sample 3, water is poured into the hose sample 3, and then the hose sample 3 is placed on the placing table 1 in a bent state, and the hose sample 3 is made to fit with the U-shaped top plate 2, and then the clamping plate 4 is rotated to cooperate with the U-shaped top plate 2 to form a clamping state for the hose sample 3, and at the same time, the connecting rod 13 enters the receiving groove, and one end of the inclined wedge structure of the limiting rod 9 is squeezed to make the limiting rod 9 leave the receiving groove, and the spring 11 is compressed by force. When the connecting rod 13 completely enters the receiving groove, the limiting rod 9 is disengaged from the receiving groove. When the test is completed, the rotating shaft 6 is driven by the clockwise rotation of the handle 12 to rotate, and the rotating shaft 6 drives the rack 7 to move in opposite directions through the gear 7, and the opposite movement of the rack 7 drives the limiting rod 9 to leave the receiving groove, and then the card plate 4 is turned over to take out the water sample 3.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A fire hose bending test stand, comprising a placement table (1), characterized in that: A U-shaped top plate (2) is fixedly arranged on the placement table (1), and clamping plates (4) are arranged at the top ends of the two opposite sides of the U-shaped top plate (2) via hinges. The clamping plates (4) cooperate with the U-shaped top plate (2) to clamp a water hose sample (3) in a bent state, and limiting devices are arranged on the clamping plates (4) and the placement table (1) for simultaneously limiting the position of the clamping plates (4).

2. The fire hose bending test stand according to claim 1, characterized in that: The limiting device comprises a connecting rod (13), a limiting rod (9), a rack (10) and a gear (7); the connecting rod (13) is fixedly arranged at the bottom of the card plate (4); a receiving groove matching the connecting rod (13) is provided on the placement platform (1); a limiting groove (15) is provided on one side of the connecting rod (13); a sliding groove (8) is provided inside the placement platform (1); a limiting rod (9) is slidably arranged in the sliding groove (8); one end of the limiting rod (9) cooperates with the limiting groove (15) to limit the card plate (4); the other end of the limiting rod (9) is fixedly arranged with a rack (10); a rotating shaft (6) is rotatably arranged inside the placement platform (1); a gear (7) is fixedly arranged on the outer surface of the rotating shaft (6); the gears (7) are respectively meshed with the racks (10); the top of the rotating shaft (6) extends to the outside of the placement platform (1) and is fixedly arranged with a rotating handle (12).

3. The fire hose bending test stand according to claim 2, characterized in that: One end of the limiting rod (9) that matches the limiting groove (15) is an inclined wedge structure.

4. The fire hose bending test stand according to claim 3, characterized in that: A spring (11) is fixedly provided at the other end of the rack (10), and the other end of the spring (11) is fixedly connected to the slide groove (8). When the spring (11) is in a natural state, one end of the limit rod (9) having an inclined wedge structure is located in the limit groove (15).

5. The fire hose bending test stand according to claim 1, characterized in that: The placement platform (1) is symmetrically provided with through holes, and bolts (16) are threadedly connected in the through holes. The bolts (16) are respectively fitted with the edges of the hose specimens (3) in a bent state.

6. The fire hose bending test stand according to claim 1, characterized in that: A handle (5) is fixedly provided on the upper surface of the clamping plate (4).

7. The fire hose bending test stand according to claim 1, characterized in that: Support legs (14) are fixedly and evenly arranged on the bottom of the placement table (1).

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