Sealing performance testing device for concrete impermeability instrument

Abstract

The utility model provides a sealing performance testing device for a concrete anti-permeability instrument. The sealing performance testing device comprises a counter-force frame seat and a pile casing fixing seat, the counter-force frame seat comprises a supporting seat, a supporting leg vertically mounted on the base and a mounting seat fixedly connected with the supporting leg, and a hand-cranking lead screw lifter is fixedly mounted on the mounting seat; a lead screw of the hand-cranking lead screw lifter penetrates through the mounting base and is fixedly connected with the upper end face of the pile casing fixing base sequentially through a lead screw connecting plate and a force sensor, and the pile casing fixing base can slide up and down between the support and the mounting base and is limited through a guide mechanism. According to the utility model, by simulating the working process of the base, the pile casing and the air bag in the pile casing in the concrete detector, air tightness detection can be carried out on the bases, the pile casings and the air bags in the pile casings of different models, the universality is strong, and the air tightness detection device can be repeatedly used.

Description

TECHNICAL FIELD

[0001] The utility model relates to concrete impermeable equipment detection technical field, concretely relates to a kind of sealing performance testing device for concrete impermeable instrument. BACKGROUND

[0002] The impermeability of concrete is an important indicator for evaluating the quality and durability of concrete, and is usually detected by using a concrete impermeability instrument.

[0003] When the impermeability instrument detects the impermeability of concrete, the concrete needs to be sealed, mainly relying on the test specimen casing and the base. The casing is provided with an air bag. The casing is mainly used for sealing the side of the test specimen, and the base is used for sealing the bottom and the high-pressure water injection channel. During the upgrading and replacement of the casing and the base of the impermeability instrument, the functionality of the casing and the base needs to be tested. The conventional impermeability instrument cannot test a single casing and base. After large-scale production, the casing and the base are installed on the impermeability instrument for testing. If the performance is not good, it will cause a lot of cost. UTILITY MODEL CONTENT

[0004] The utility model aims to provide a sealing performance testing device for concrete impermeable instrument to solve the above-mentioned deficiencies of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] A sealing performance testing device for concrete impermeable instrument is used to detect the sealing performance of the base, casing and air bag in the casing of the concrete impermeable instrument. The testing device includes a counterforce frame base and a casing fixing base. The counterforce frame base includes a support, a vertical support installed on the base, and a mounting seat fixedly connected with the support leg. A hand-operated screw rod lifter is fixedly installed on the mounting seat. The screw rod of the hand-operated screw rod lifter passes through the mounting seat and is fixedly connected with the upper end surface of the casing fixing base through a screw rod connecting plate and a force sensor in sequence. The casing fixing base can slide up and down between the support and the mounting seat and be limited by a guide mechanism. The base to be tested is fixed on the support, the casing to be tested is fixedly connected with the lower end surface of the casing fixing base, and the air bag to be tested is placed in the casing to be tested.

[0007] Further, the force sensor is fixedly connected with the upper end surface of the casing fixing base. The screw rod connecting plate is fixed on the upper end surface of the casing fixing base through a stud and a nut. A spring is sleeved on the stud, so that there is a gap between the screw rod connecting plate and the force sensor when the screw rod connecting plate is not under stress.

[0008] Furthermore, the guiding mechanism includes an optical axis, an optical axis base and an optical axis top fixed at both ends of the optical axis and respectively fixedly connected to the support and the mounting base, and an optical axis sliding sleeve sleeved on the optical axis and slidably connected to the optical axis. The protective sleeve fixing plate has a through hole for fixing the optical axis sliding sleeve.

[0009] Furthermore, the high-pressure water injection channel of the base under test is connected to a water supply booster device, and the air tube of the airbag under test is connected to an air source.

[0010] As can be seen from the above technical solutions, this utility model can test different types of bases, casings and airbags in a concrete testing instrument by simulating the working process of the base, casing and airbag inside the casing. It has strong versatility and can be used repeatedly. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram showing the connection of the lead screw connecting plate, force sensor, and protective sleeve fixing seat of this utility model;

[0013] Figure 3 This is a schematic diagram of the guiding mechanism of this utility model;

[0014] In the diagram: 1. Reaction frame base; 11. Support; 12. Support leg; 13. Mounting base; 2. Casing fixing base; 3. Hand-cranked screw jack; 4. Screw connecting plate; 5. Force sensor; 6. Guide mechanism; 61. Optical axis; 62. Optical axis base; 63. Optical axis top seat; 64. Optical axis sliding sleeve. Detailed Implementation

[0015] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0016] like Figure 1 The device shown is a sealing performance testing device for a concrete permeability meter. This testing device is used to test the sealing performance of the base, casing, and air bladder inside the casing of the concrete permeability meter. The testing device includes a reaction frame base 1 and a casing fixing base 2. The reaction frame base 1 includes a support 11, a support leg 12 vertically mounted on the base, and a mounting base 13 fixedly connected to the support leg. A hand-cranked screw jack 3 is fixedly mounted on the mounting base 13. The screw of the hand-cranked screw jack 3 passes through the mounting base 13 and is fixedly connected to the upper end face of the casing fixing base 2 through a screw connecting plate 4 and a force sensor 5. The casing fixing base 2 can slide up and down between the support 11 and the mounting base 13 and is limited by a guide mechanism 6.

[0017] like Figure 2As shown in the preferred embodiment, the force sensor 5 is fixedly connected to the upper end face of the protective sleeve fixing seat 2; the lead screw connecting plate 4 is fixed to the upper end face of the protective sleeve fixing seat by a stud and a nut, and a spring is sleeved on the stud, so that there is a gap between the lead screw connecting plate 4 and the force sensor 5 when no force is applied. The spring can prevent the lead screw connecting plate 4 from contacting the force sensor 5 before the test begins, ensuring that the initial value of the force sensor 5 is zero.

[0018] like Figure 3 As shown, the guide mechanism 6 of this preferred embodiment includes an optical axis 61, an optical axis base 62 and an optical axis top seat 63 fixed at both ends of the optical axis 61 and respectively fixedly connected to the support 11 and the mounting seat 13, and an optical axis sliding sleeve 64 sleeved on the optical axis 61 and slidably connected to the optical axis 61. The protective sleeve fixing plate 2 has a through hole for fixing the optical axis sliding sleeve 64.

[0019] In the specific testing process, the base to be tested is first fixed to the support, and the protective sleeve to be tested is fixedly connected to the lower end face of the protective sleeve fixing seat. The airbag to be tested is placed inside the protective sleeve (in actual use, the airbag is equipped with an air tube, and the protective sleeve has a through hole that allows the air tube to extend). Then, the protective sleeve to be tested is raised and separated from the base to be tested by a hand-cranked screw jack, and the test concrete is placed on the base to be tested. The protective sleeve to be tested is lowered by a hand-cranked screw jack. When the screw connecting plate contacts the force sensor, the force sensor begins to measure and record the force changes during the test until the protective sleeve to be tested and the base to be tested are closed. The high-pressure water injection channel of the base to be tested is connected to the water supply booster equipment. The air tube of the airbag under test is connected to the air source; the air pressure is increased to the target air pressure value by using the air source, based on the sealing air pressure set in the experiment; the water pressure is increased to the target water pressure value by using the water pressurization device, based on the water pressure set in the experiment; the changes in air pressure, water pressure and force parameters are recorded during the experiment; after the experiment, the water pressure in the base and the air pressure in the airbag are removed, and the protective cylinder is raised and separated from the base under test by using a hand-cranked screw lifter, and the experimental concrete is taken out; by observing the side wall of the concrete specimen, if the high-pressure water does not seep from the bottom of the specimen along the side wall to the top, the sealing performance is good; otherwise, the sealing performance is poor.

[0020] The parameters obtained during the experiment can provide guidance for subsequent experiments and mechanical design; for example, the force parameters recorded by the force sensor can provide a design basis for the load-bearing capacity of the frame structure of the permeability tester, and the sealing performance of the tested components under different conditions can be obtained by changing the water pressure and air pressure.

[0021] The above described embodiments are merely preferred embodiments of the utility model, and do not limit the scope of the utility model, and various modifications and improvements to the technical scheme of the utility model made by those skilled in the art without departing from the design spirit of the utility model shall fall within the protection scope of the utility model as defined by the claims.

Claims

1. A sealing performance testing device for a concrete permeability meter, used to test the sealing performance of the base, casing, and air bladder inside the casing of the concrete permeability meter, characterized in that, The testing device includes a reaction frame base and a protective sleeve fixing base; The reaction frame includes a support, a leg vertically mounted on the base, and a mounting base fixedly connected to the leg. A hand-cranked screw lifter is fixedly mounted on the mounting base. The lead screw of the hand-cranked screw jack passes through the mounting base and is fixedly connected to the upper end face of the protective cylinder fixing base via the lead screw connecting plate and the force sensor in sequence. The protective cylinder fixing base can slide up and down between the support and the mounting base and is limited by the guide mechanism. The base to be tested is fixed on the support, the protective sleeve to be tested is fixedly connected to the lower end face of the protective sleeve fixing seat, and the airbag to be tested is placed inside the protective sleeve to be tested.

2. The sealing performance testing device for a concrete permeability analyzer according to claim 1, characterized in that, The force sensor is fixedly connected to the upper end face of the casing fixing seat; the lead screw connecting plate is fixed to the upper end face of the casing fixing seat by a stud and a nut, and a spring is sleeved on the stud so that there is a gap between the lead screw connecting plate and the force sensor when no force is applied.

3. The sealing performance testing device for a concrete permeability analyzer according to claim 1, characterized in that, The guiding mechanism includes an optical axis, an optical axis base and an optical axis top seat fixed at both ends of the optical axis and respectively fixedly connected to the support and the mounting seat, and an optical axis sliding sleeve sleeved on the optical axis and slidably connected to the optical axis. The protective sleeve fixing plate has a through hole for fixing the optical axis sliding sleeve.

4. The sealing performance testing device for a concrete permeability analyzer according to claim 1, characterized in that, The high-pressure water injection channel of the base under test is connected to a water supply booster device, and the air tube of the airbag under test is connected to an air source.

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