CN221078265U

CN221078265U - Explosion diaphragm selection test device

Info

Publication number: CN221078265U
Application number: CN202322827618.2U
Authority: CN
Inventors: 乔凤玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-10-21
Filing date: 2023-10-21
Publication date: 2024-06-04
Anticipated expiration: 2033-10-21

Abstract

The utility model discloses a bursting diaphragm selection test device which comprises an air compressor, wherein the outlet end of the air compressor is connected with the inlet end of a water storage pressurized tank through a first pipeline, the outlet end of the water storage pressurized tank is connected with a conical container through a second pipeline, the other end of the conical container is provided with a diaphragm clamp holder, and a water injection pipe is arranged on the second pipeline; the utility model is characterized in that an exhaust pipe I is arranged at the top of a water storage pressurizing tank, an exhaust pipe II and a pressure gauge are arranged on a conical container, a test diaphragm is fixed on the conical container of a carrier, the water storage tank and the conical container are filled with water, an air compressor begins to pressurize the water storage tank, the pressure is continuously increased, a valve leading to the conical container is rapidly opened, whether the diaphragm at the tail end of the conical container is damaged or not is observed, the operation is repeated for a plurality of times, and meanwhile, diaphragms with different specifications are replaced.

Description

Explosion diaphragm selection test device

Technical Field

The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a bursting disc selection test device.

Background

The burst membrane technology is a new technology applied to the aspect of hydraulic and hydroelectric engineering, replaces the mode of water hammer pressure regulation by the traditional pressure regulating tower, reliably protects a diversion system and a unit, and is widely applied to diversion type power stations of high-water-head and long-pressure water channels. The principle is that a group of metal diaphragms subjected to strict calculation and precise processing are arranged at the tail end of a water diversion pressure pipeline, a weak link is artificially manufactured, when an operation unit is suddenly subjected to power failure or overlarge fluctuation of a power grid or sudden load shedding caused by sudden failure of the unit, and the water pressure of the water diversion system rises to reach a preset value, the diaphragms are broken to gush out water flow and discharge pressure, so that the self safety of the water diversion system and the unit is effectively protected; the membrane is a core component of the rupture disc technology and is a 'rupture disc' in the rupture disc device. The pressure pipeline is characterized in that when the overpressure or the pressure of the pressure pipeline provided with the rupture disk device reaches a specific value, the diaphragm is rapidly destroyed, and the pressure is released. The diaphragm is a pressure sensitive element, and is required to be sensitive in operation, accurate in operation and high in precision, so that the diaphragm material and thickness specification selection are particularly important, the diaphragm is required to be selected through a strict test, the diaphragm is a core element in a hydropower station rupture disk device, and is disposable in material consumption during operation, the hydropower station rupture disk device runs for a long time, a large number of diaphragms are consumed, the diaphragm supplement reserve is required to be ensured, and technical support is required to be provided for purchasing the diaphragm, so that the design of the bursting disk selection test device is a problem which needs to be solved urgently by technicians in the related field

Disclosure of utility model

In order to solve the technical problems, the technical scheme provided by the utility model is as follows: the bursting diaphragm selection test device is characterized by comprising an air compressor, wherein the outlet end of the air compressor is connected with the inlet end of a water storage pressurizing tank through a first pipeline, the outlet end of the water storage pressurizing tank is connected with a conical container through a second pipeline, a diaphragm clamp is arranged at the other end of the conical container, a water injection pipe is arranged on the second pipeline, an exhaust pipe I is arranged at the top of the water storage pressurizing tank, and an exhaust pipe II and a pressure gauge are arranged on the conical container; the membrane clamp comprises a tongue-and-groove flange fixed on the outer side of the open end, and the outer edge of the tongue-and-groove flange is fixed with a tongue-and-groove flange pressing plate through bolts.

Compared with the prior art, the utility model has the advantages that: the utility model has simple structure, no complicated tool processing, simple and quick equipment connection, easy operation of device test, visual simulation of the process of impacting the bursting disc by water hammer pressure, accurate selection of bursting disc specification and practicability;

When the device is used, the test membrane is fixed on the membrane holder of the conical container, the water storage tank and the conical container are filled with water, the air compressor starts to pressurize the water storage tank, the pressure is continuously increased, the valve leading to the conical container is rapidly opened when the pressure is increased to a specific pressure value, whether the membrane at the tail end of the conical container is damaged or not is observed, the operation is repeated for a plurality of times, meanwhile, membranes with different specifications are replaced, if the membrane is damaged, the value of the pressure gauge of the conical container is read, and the corresponding thickness of the damaged membrane is recorded.

Drawings

FIG. 1 is a schematic view of a burst disk selection test apparatus according to the present utility model.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

In the description of the embodiments of the present utility model, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate an azimuth or a positional relationship based on that shown in the drawings, or an azimuth or a positional relationship in which the product of the present utility model is conventionally put when used, it is merely for convenience of describing the present utility model and simplifying the description, and it does not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," "overhang" and the like, if any, do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present utility model, "plurality" means at least 2.

In the description of the embodiments of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Examples:

The burst membrane selection test device comprises an air compressor 1, wherein the outlet end of the air compressor 1 is connected with the inlet end of a water storage pressurization tank 3 through a pipeline I2, the outlet end of the water storage pressurization tank 3 is connected with a conical container 5 through a pipeline II 4, a membrane clamp 6 is arranged at the other end of the conical container 5, and a water injection pipe 7 is arranged on the pipeline II 4; one end of the conical container 5 connected with the pipeline II 4 is a conical end, the other end is an open end, the conical end is provided with a 10-degree diffusion angle, the conical container 5 is provided with a 10-degree diffusion angle, and the transmission pressure is uniformly diffused; the diaphragm clamp 6 comprises a rabbet flange 601 fixed on the outer side of the open end, and a rabbet flange pressure plate 603 is fixed on the outer edge of the rabbet flange 601 through bolts 602; the top of the water storage pressurizing tank 3 is provided with a first exhaust pipe 8, and the conical container 5 is provided with a second exhaust pipe 9 and a pressure gauge; the first pipeline 2, the first exhaust pipe 8, the second exhaust pipe 9 and the water injection pipe 7 are respectively provided with a valve 10; the second pipeline 4 is provided with a pressure control valve 11 at a position between the water storage pressurization tank 3 and the water injection pipe 7.

The hydropower station of the red mountain water reservoir of the inner Mongolian autonomous region is used as an experimental object, and the specific experimental process comprises the following steps of:

(1) Determination of test parameters

(1.1) Explosion Water pressure

The proper diaphragm bursting pressure is determined, which is the necessary premise of the accurate and efficient work of the burst membrane device, the normal tail water level of the red mountain water power station is 414.5m, P=1%, the tail water level is 418.2m, P=0.01% and the tail water level is 419.2m, and in order to ensure that the diaphragm device is not flooded, the height of the diaphragm position is required to be greater than 419.2m and is determined to be 420.2m; the central elevation of the diversion steel pipe is 414.54m, and the height of the diaphragm device higher than the diversion pipe line is as follows: h=420.2-414.54 =5.66 m;

Estimated that the design specification volute pressure cannot exceed 70% of the highest water head, the burst pressure of the burst membrane should be calculated as the recent maximum water head of 20.8 m: hpp < (1+ζ) ×hmax-h= (1+0.7) ×20.8-5.66=29.6 m

The burst pressure of the diaphragm, calculated as the long-term maximum head 25m, should be: hpp < (1+ζ) Hmax-h= (1+0.7) ×25-566=36.9 m

So the bursting pressure is determined to be 30-35 m; burst pressure Hpp =30 to 32m (0.29 to 0.31 mpa)

(1.2) Diaphragm diameter

The membrane holder and membrane dimensions in the test apparatus should be consistent with the hydropower station rupture disc apparatus, dr=0.38 m. Determined by the design department by the transient calculation.

(2) Diaphragm test procedure

(2.1) Preparing work before experiments, dividing 10 persons participating in the experiments into two test groups, wherein each test group is completed by 5 persons in a matched mode, one person controls an air compressor, one person controls a pressurizing valve, a third person integrally observes the test device, and the other two persons observe and record the damage condition of a pressure gauge and a diaphragm on a cone; let experimenter familiarize test operation rule, confirm diaphragm specification test purpose, emphasize the work discipline. Checking all component instruments of the test device to ensure that the component instruments participate in the test in a good state; and stacking the films with different specifications for the test respectively, and sticking a label to avoid damage.

(2.2) Assembling and debugging test apparatus

The assembly connection test device is characterized in that the water storage tank and the conical container are pressure containers, the connection assembly is required to be sealed and firm, and the secondary protection chain is additionally arranged at the connection position. After the device is assembled, the diaphragm holder is additionally provided with a diaphragm for debugging, the device is debugged, and the tightness, the valve operability, the pressure gauge sensitivity and the working condition of the air compressor of the test device are checked.

(2.3) Test procedure

(2.3.1) One group of testers works in place, and the two groups of testers assist in sightseeing and hearing. When the water storage pressure tank is filled with water to 1/2 of the filling body, the diaphragm is selected to be added, the diaphragm is selected to be taken according to the label mark, and the specification of the diaphragm is checked by a vernier caliper. Meanwhile, the flange and the pressure plate of the diaphragm clamp holder are carefully checked, and if a burr acute angle exists, the diaphragm clamp holder must be polished so as not to be damaged, and the test result is affected;

(2.3.2) continuously injecting water into the water storage pressure tank, and discharging air in the pressure tank and the conical container after the water storage pressure tank is filled with water. Gradually increasing the pressure value, opening the pressure control valve of the conical container, reading and recording the pressure value of the pressure gauge, and observing the condition of the diaphragm.

And (2.3.3) continuing to pressurize, when the pressure is increased to the pressure of the membrane, reading and recording the pressure value of the pressure gauge, and if the pressure value is consistent with the pressure parameter value, preliminarily determining the damaged membrane as a candidate specification, and checking that the pressure of the membrane is gradually increased and the fatigue strength of the membrane is limited by the group of tests.

(2.3.4) Re-installing the retainer membrane, wherein the membrane specification is selected (2.3.3) consistently, the cone-shaped device control valve is closed after the water injection and the air exhaust are finished, the device system is pressurized, and the device is opened rapidly when the pressure is increased to the parameter value;

The cone-shaped device controls the valve, the change condition of the diaphragm is observed, if the diaphragm is damaged, the fatigue pressure intensity limit of the diaphragm with the specification is indicated to be consistent with the instantaneous intensity limit, and the diaphragm can be tentatively set as an alternative; if the diaphragm is not broken, the instant strength limit of the diaphragm with the specification is higher than the fatigue strength limit, the diaphragm is continuously pressurized until the diaphragm is broken, the broken pressure value is recorded, compared with the pressure parameter value, the diaphragm with the specification can be considered to meet the requirement in the parameter bursting pressure range, and if the diaphragm breakage pressure is not in the parameter bursting pressure range, the diaphragm with a slightly thin specification is continuously tested.

(2.3.5) The test membrane is sequentially carried out from thickness delta=0.5-0.3 mm from thickness to thickness, 3-5 groups of tests are carried out on each specification, two test groups are alternately carried out in the tests, the test results of the two groups are compared, and finally the test results are determined;

in addition, problems noted in the test include:

The test is operated under high pressure, the assembly and connection of the device are required to be safe and reliable, the person participating in the test needs to pay attention to the test device at any time, the safety protection is well, and the staff observing the change of the diaphragm cannot face the diaphragm and keeps a distance of more than 1 m; in order to accurately record test pressure, the pressure gauge is a sensitive, high-precision and memory product, and if the pressure gauge without memory function is adopted, the working condition of the pressure gauge is recorded by a video on the test site; all tests are recorded in a detailed test process, and test conclusions are accurately provided to a diaphragm purchasing department.

The utility model and its embodiments have been described above with no limitation, and the actual construction is not limited to the embodiments of the utility model as shown in the drawings. In summary, if one of ordinary skill in the art is informed by this disclosure, a structural manner and an embodiment similar to the technical solution should not be creatively devised without departing from the gist of the present utility model.

Claims

1. The utility model provides a bursting diaphragm selects test device, its characterized in that includes the air compressor machine, the air compressor machine exit end is connected with water storage pressurized tank entry end through pipeline one, water storage pressurized tank exit end is connected with the taper container through pipeline two, and the taper container other end sets up the diaphragm holder, be provided with the water injection pipe on the pipeline two, water storage pressurized tank top sets up blast pipe one, set up blast pipe two and manometer on the taper container.

2. The burst disk selection test device according to claim 1, wherein one end of the conical container connected with the second pipeline is a conical end, the other end of the conical container is an open end, the conical end is provided with a 10-degree diffusion angle, the disk holder comprises a tongue-and-groove flange fixed on the outer side of the open end, and the outer edge of the tongue-and-groove flange is fixed with a tongue-and-groove flange pressing plate through bolts.

3. The burst disk selection test device according to claim 1, wherein valves are respectively arranged on the first pipeline, the first exhaust pipe, the second exhaust pipe and the water injection pipe.

4. A burst disk selection test device according to claim 1, wherein the pipeline is provided with a pressure control valve at a position between the water storage pressurized tank and the water injection pipe.