Device for testing bending performance of fire extinguisher hose

Abstract

The utility model discloses a device for testing the bending performance of a fire extinguisher hose, which comprises a base, the base is rotatably connected with a first chuck for clamping one end of the hose, and the first chuck is provided with a displacement sensor for testing the inner diameter of the hose; a second chuck used for clamping the other end of the hose is further connected to the base in a sliding mode. The device can solve the problems that in the prior art, a laboratory technician needs to have large arm strength, and experimental data are not accurate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the test and inspection field of fire fighting equipment detection equipment, and specifically discloses a device for testing the bending performance of fire extinguisher hose. BACKGROUND

[0002] Fire extinguisher is one of common fire fighting equipment, which is stored in public places or places where fire may occur. In order to ensure quality, avoid storage leakage and guarantee reliability and stability during use, the performance of each part of the fire extinguisher needs to be strictly detected before leaving factory and during storage. For the detection of hose, the standard stipulates that the hose with inner diameter greater than 22mm needs to be clamped at both ends and bent 90 degrees for 10 seconds after standing for 24 hours at the lowest use temperature, and then water pressure test is carried out. In the prior art, the inner diameter is measured manually by using a caliper, the bending test is carried out by using clamps to clamp both ends, and the time is manually counted. Since the moment of force is large when the hose is bent, the bending test is a great test for the arm strength of the experimenter, and the timing and bending standard degree are not accurate enough, which affects the accuracy of test data. SUMMARY

[0003] In view of the above problems, the utility model discloses a device for testing the bending performance of fire extinguisher hose, which can solve the problems of large arm strength of the experimenter and inaccurate experimental data in the prior art.

[0004] A device for testing the bending performance of fire extinguisher hose, comprising a base, a first chuck for clamping one end of the hose is rotatably connected to the base, and a displacement sensor for testing the inner diameter of the hose is arranged on the first chuck; a second chuck for clamping the other end of the hose is also slidably connected to the base.

[0005] Preferably, a lead screw is rotatably connected to the left end face of the first chuck, two pieces of lead nuts with opposite movement directions are threadedly connected to the lead screw, and each lead nut is connected to a displacement sensor.

[0006] Preferably, the lead screw has two threads with opposite rotation directions, each thread is connected to a lead nut, and the threads of the two lead nuts also have opposite rotation directions.

[0007] Preferably, the left end face of the first chuck is also provided with a guide rod parallel to the lead screw, and the lead nut is slidably connected to the guide rod.

[0008] Preferably, the upper surface of the base is provided with an arc-shaped guide groove, a first support is arranged in the arc-shaped guide groove, and the first chuck is connected to the first support.

[0009] Preferably, the upper surface of the base is provided with a left-right linear guide groove, a second support is arranged in the linear guide groove, and the second chuck is connected with the second support.

[0010] Preferably, the linear guide groove is a T-shaped groove, and the bottom of the second support is provided with a T-shaped block matched with the T-shaped groove.

[0011] Preferably, the left end surface of the first chuck is provided with a support block for supporting the end surface of the hose, and the height of the support block is higher than the mounting height of the lead screw.

[0012] Preferably, the first support is connected with a driving motor, and the driving motor is a servo motor.

[0013] Beneficial effects

[0014] The utility model discloses a first chuck and a second chuck are arranged on the two ends of the hose respectively, and the hose is clamped by the two chucks, and a displacement sensor is arranged on the end surface of one of the two chucks to measure the inner diameter of the hose. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced to the drawings needed to be used in the embodiment, and should understand, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the range, for the ordinary skilled person in the art, under the premise of not paying the creative labor, can also obtain other related drawings according to these drawings.

[0016] Figure 1 It is the overhead structure schematic diagram of the utility model;

[0017] Figure 2 It is the main view structure schematic diagram of the utility model;

[0018] Figure 3 It is Figure 2 A-A sectional view in the embodiment;

[0019] Figure 4 It is Figure 3 The local enlarged view of C;

[0020] Figure 5 It is Figure 2 B-B sectional view in the embodiment;

[0021] Figure 6 It is Figure 5 The local enlarged view of D;

[0022] Figure 7 is a left view structure schematic diagram of the utility model;

[0023] In the drawing, 1, base, 1.1, arc-shaped guide slot, 1.2, straight guide slot, 2, first chuck, 3, first support, 4, second support, 4.1, long slot hole, 5, clamping jaw, 6, driving motor, 7, hose, 8, displacement sensor, 9, screw rod, 10, supporting block, 11, guide rod, 12, second chuck, 13, lock screw. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. The embodiments described below with reference to the drawings are exemplary and are used only for explaining the utility model and cannot be understood as limiting the utility model.

[0025] It should be noted that, firstly, the "hose" in the utility model is a kind of rubber pipe with metal end head at both ends in fire-fighting equipment industry, which is named, has certain hardness and rigidity, does not occur clamping deformation when carrying out bending test in furniture clamping state, so the deformation of hose after clamping is not considered. Secondly, the upper, lower, left and right positions in the utility model are described based on the position of the device in the state shown in the drawings. Figure 2

[0026] As shown in Figures 1-7 The utility model discloses a kind of devices for testing the bending performance of fire extinguisher hose, the device includes disc-shaped base 1, the bottom of this base 1 is supported with four legs, and driving motor 6 is installed in the center position of lower surface, the driving motor is servo motor, can accurately rotate 90 degrees according to input instruction and feedback position information, with higher start-stop and pause position precision. The output shaft of driving motor 6 is connected with first support 3 after being up through the upper surface of base 1, and the first support 3 is L-shaped structure of horizontal placement, first chuck 2 is installed in the left end of vertical plate of L-shaped structure of horizontal placement, clamping jaw 5 is installed on the first chuck 2, for clamping hose 7.

[0027] Support plate is provided on the left end surface of first chuck 2, and horizontal or vertical direction's screw rod 9 and guide rod 11 that are parallel to the screw rod 9 are rotatably connected on the support plate and pass through the center of first chuck 2, the screw rod 9 is divided by the center of first chuck 2, and left-hand thread and right-hand thread are respectively provided on the two sides of the screw rod 9, and the threaded portion on each side is connected with a nut, the right side of the nut is installed with displacement sensor 8, and the displacement sensor 8 extends into the inside of hose 7. The displacement sensor connected with the nut can realize the measurement of the inner diameter of hose by driving motor 6 driving screw rod 9 to rotate and then driving two nuts to move away from each other or move close to each other.

[0028] ​In order to ensure that the collet 5 clamps the hose 7 and the nut can drive the displacement sensor 8 to move freely, the utility model discloses a support block 10 for supporting the end face of the hose is arranged on the left end face of the first chuck 2, and the height of the support block is higher than the height of the support plate.

[0029] A linear guide groove 1.2 is formed on the upper surface of the base 1 in the left-right direction, the cross section of the linear guide groove 1.2 is T-shaped, a T-shaped block is arranged on the bottom of the second support 4, the T-shaped block is installed in the T-shaped linear guide groove, the second support 4 can move left and right along the base 1, the second support is also a horizontally arranged L-shaped structure, a second chuck 12 is installed on the right end face of the vertical plate of the second support, for clamping the other end of the hose 7, after the left-right position of the second support is adjusted, the position of the second support 4 can be determined by tightening the locking screw 13 on the horizontal plate of the second support. A long slot hole 4.1 is formed on the horizontal plate of the second support 4, the output shaft of the driving motor 6 penetrates the long slot hole 4.1, the long slot hole 4.1 is used to avoid the output shaft of the driving motor 6 when the second support 4 slides left and right on the base 1, so that interference is avoided.

[0030] An arc-shaped guide groove 1.1 is formed on the right half of the base 1, an arc-shaped block that cooperates with the arc-shaped guide groove 1.1 is arranged on the bottom of the first support 3, after the two ends of the hose 7 are clamped by the corresponding chucks and collets 5, the driving motor 6 is started, so that the first support 3 and the right end of the hose 7 can be rotated 90 degrees around the arc-shaped groove to meet the test requirements.

[0031] The first chuck 2 and the second chuck 12 are all three-jaw chucks, and have the function of self-centering, so that the hose 7 can be clamped in alignment.

[0032] Although the embodiments of the utility model have been shown and described, the specific embodiments are only an explanation of the utility model, and are not a limitation of the utility model, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner, and the person skilled in the art can make modifications, replacements and variations of the embodiments without creative contribution after reading the specification without departing from the principles and the purpose of the utility model, but as long as in the scope of the claims of the utility model, it is protected by the patent law.

Claims

1. An apparatus for testing the bend performance of a fire extinguisher hose, characterized in that, The utility model relates to a test device for testing the inner diameter of a flexible pipe, comprising a base (1) having a first chuck (2) rotatably connected thereto for clamping one end of the flexible pipe (7), the first chuck (2) being provided with a displacement sensor (8) for testing the inner diameter of the flexible pipe; the base (1) is also slidably connected with a second chuck (12) for clamping the other end of the flexible pipe (7).

2. A device for testing the bend performance of a fire extinguisher hose according to claim 1, characterized in that The left end surface of the first chuck (2) is rotatably connected with a lead screw (9), the lead screw (9) being threadedly connected with two nuts moving in opposite directions, each nut being connected with a displacement sensor (8).

3. A device for testing the bend performance of a fire extinguisher hose according to claim 2, wherein, The lead screw (9) has two threads with opposite directions, each thread being connected with a nut, the threads of the two nuts being opposite in direction.

4. A device for testing the bend performance of a fire extinguisher hose according to claim 2, wherein, The left end surface of the first chuck (2) is also provided with a guide rod (11) parallel to the lead screw, the nuts being slidably connected with the guide rod (11).

5. A device for testing the bend performance of a fire extinguisher hose according to claim 2, wherein, The upper surface of the base (1) is provided with an arc-shaped guide groove (1.1), the first chuck (2) being connected with a first support (3) arranged in the arc-shaped guide groove (1.1).

6. A device for testing the bend performance of a fire extinguisher hose according to claim 5, wherein, The upper surface of the base (1) is provided with a linear guide groove (1.2) in the left-right direction, the second chuck (12) being connected with a second support (4) arranged in the linear guide groove (1.2).

7. A device for testing the bend performance of a fire extinguisher hose according to claim 6, characterised in that, The linear guide groove (1.2) is a T-shaped groove, the bottom of the second support (4) being provided with a T-shaped block matched with the T-shaped groove.

8. A device for testing the bend performance of a fire extinguisher hose according to claim 6, wherein, The left end surface of the first chuck (2) is provided with a support block (10) for supporting the end surface of the flexible pipe (7), the height of the support block (10) being higher than the installation height of the lead screw (9).

9. A device for testing the bend performance of a fire extinguisher hose according to claim 5, wherein, The first support (3) is connected with a driving motor (6), the driving motor (6) being a servo motor.

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