A uranium enrichment pump, valve simulation test platform

Abstract

A uranium enrichment pump and valve simulation test platform comprises an inlet buffer container, a test pump, and an outlet buffer tank container. The feed container and the air filter are connected to the inlet of the inlet buffer container via a feed container valve and an air filter valve, respectively. The outlet of the inlet buffer container is connected to a flow meter via a first valve and a second valve in sequence. The flow meter is connected to a test valve via a third valve. The test valve is connected to the inlet of the test pump via a fourth valve. The outlet of the test pump is connected to the outlet buffer tank container via a fifth valve and a sixth valve in sequence. The outlet of the outlet buffer tank container is connected to an evacuation pump, a material receiving container, and a refrigeration device via a seventh valve and an eighth valve, respectively. By adding an evacuation device, a feeding device, a heating device, a heat preservation facility, and a material receiving device, the temperature requirements during the test of the vacuum pump valve using simulated gas are guaranteed, and the normal physical phase state during the simulated gas feeding, receiving, and testing processes is effectively controlled.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of performance test (process equipment and control) of vacuum pump and vacuum valve used in uranium enrichment industry, and particularly relates to a uranium enrichment pump and valve simulation test platform, which ensures normal feeding and collecting of simulation gas, realizes performance test of new vacuum pump and vacuum valve under the condition close to actual operation gas working condition of uranium enrichment, and improves reliability of input uranium enrichment system operation. BACKGROUND

[0002] The medium through which the general pump and valve detection passes is pure gas or liquid, and the medium of the running system of the uranium enrichment industry is uranium hexafluoride. In the normal running process, the physical phase changes are relatively complex, and gas, liquid and solid states may exist. The molecular weight is more than ten times that of air, and it is corrosive. Therefore, the general pump and valve detection device cannot accurately detect the pump and valve with simulation gas similar to uranium hexafluoride in physical properties.

[0003] At present, the pump and valve used in the uranium enrichment industry are all imported equipment, and the equipment instruction manual does not show that the simulation gas test of uranium hexafluoride has been carried out before being put into operation. With the development of domestic pump and valve in the field of uranium enrichment, it is imperative to build related facilities, platforms, systems and standards for simulation gas test in the field of uranium enrichment. At present, the related test facilities and platforms at home and abroad are still blank. Therefore, providing a configuration scheme of the uranium enrichment pump and valve simulation test platform auxiliary equipment is an important link to solve the problem. SUMMARY

[0004] The purpose of the present application is to ensure the temperature requirement of the simulation gas in the process of testing the vacuum pump and valve by configuring corresponding heating, cooling and heat preservation devices on the general test platform, and to effectively control the normal physical phase state of the simulation gas in the process of feeding, collecting and testing, so as to ensure the normal test and obtain accurate test data.

[0005] In order to achieve the above purpose, the technical scheme provided by the present application is that a uranium enrichment pump and valve simulation test platform, which is characterized in that it comprises an inlet buffer container, a test pump and an outlet buffer tank container, a feeding container and an air filter are connected to the inlet of the inlet buffer container through a feeding container valve and an air filter valve respectively, the outlet of the inlet buffer container is sequentially connected to a flowmeter through a first valve and a second valve, the flowmeter is connected to a test valve through a third valve, the test valve is connected to the inlet of the test pump through a fourth valve, the outlet of the test pump is sequentially connected to the outlet buffer tank container through a fifth valve and a sixth valve, and the outlet of the outlet buffer tank container is connected to an air pump, a collecting container and a refrigeration device through a seventh valve and an eighth valve respectively.

[0006] The fifth valve is connected to the pipeline between the second valve and the flow meter through the ninth valve;

[0007] The fifth valve is connected to the pipeline between the test valve and the fourth valve through the tenth valve and the eleventh valve in sequence;

[0008] The inlet of the inlet buffer container is connected to the outlet of the outlet buffer tank container through the twelfth valve;

[0009] The fourth valve is provided with a test pump inlet pressure gauge and a test pump inlet temperature probe on the pipeline of the inlet of the test pump;

[0010] The outlet of the test pump is provided with a test pump outlet pressure gauge and a test pump outlet temperature probe on the pipeline between the test pump and the fifth valve;

[0011] The inlet buffer container is provided with a test valve inlet pressure gauge, and the outlet buffer tank container is provided with a test valve outlet pressure gauge;

[0012] The second valve, the first valve, the third valve, the fourth valve, the fifth valve, the sixth valve, the seventh valve, the eighth valve, the ninth valve, the tenth valve, the eleventh valve, the twelfth valve, the flow meter, the test valve, the test pump, the inlet buffer container, the outlet buffer tank container, the receiving container, the refrigeration device, the evacuation pump, the feeding container, the air filter and the pipeline are all provided with a heating device, and the heating device is externally provided with a heat preservation layer.

[0013] The aforementioned heating device is an electric heating device.

[0014] The aforementioned heat preservation layer is an elastic sponge heat preservation layer.

[0015] The beneficial effects of the present application are as follows:

[0016] By configuring corresponding heating, cooling and heat preservation devices on the universal test platform, the temperature requirements during the test of the vacuum pump valve by the simulation gas are ensured, and the normal phase state during the simulation gas feeding, receiving and test process is effectively controlled, so that the test is normally carried out and accurate test data is obtained.

[0017] The present application will be further described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the uranium enrichment pump and valve simulation test platform.

[0019] In the figure: 1, second valve; 2, flow meter; 3, third valve; 4, test valve; 5, fourth valve; 6, test pump; 7, fifth valve; 8, tenth valve; 9, eleventh valve; 10, ninth valve; 11, first valve; 12, inlet buffer container; 13, sixth valve; 14, outlet buffer tank container; 15, twelfth valve; 16, seventh valve; 17, eighth valve; 18, test pump inlet pressure gauge; 19, receiving container and refrigeration device; 20, evacuation pump; 21, feed container; 22, air filter; 23, air filter valve; 24, feed container valve; 25, test valve outlet pressure gauge; 26, test valve inlet pressure gauge; 27, test pump inlet temperature probe; 28, test pump outlet temperature probe; 29, test pump outlet pressure gauge. DETAILED DESCRIPTION

[0020] In order to further clarify the technical means and effects taken to achieve the intended purpose of the present application, the specific embodiments, structural features and effects of the present application are described in detail below in combination with the drawings and examples.

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlapped", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0023] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features; in the description of the present application, unless otherwise specified, the meaning of "multiple" is two or more.

[0024] In order to overcome the defect that the general pump and valve detection device cannot accurately detect the pump and valve of the simulated gas with similar physical properties to uranium hexafluoride, the present embodiment provides a kind of Figure 1The uranium enrichment pump and valve simulation test platform is characterized in that: the inlet buffer container 12, the test pump 6, the outlet buffer tank container 14, the feed container 21, the air filter 22 connected with the inlet of the inlet buffer container 12 through the feed container valve 24 and the air filter valve 23 respectively, the outlet of the inlet buffer container 12 connected with the flowmeter 2 through the first valve 11 and the second valve 1 in turn, the flowmeter 2 connected with the test valve 4 through the third valve 3, the test valve 4 connected with the inlet of the test pump 6 through the fourth valve 5, the outlet of the test pump 6 connected with the outlet buffer tank container 14 through the fifth valve 7 and the sixth valve 13 in turn, the outlet of the outlet buffer tank container 14 connected with the evacuation pump 20, the material receiving container and the refrigeration device 19 through the seventh valve 16 and the eighth valve 17 respectively; the fifth valve 7 connected with the pipeline between the second valve 1 and the flowmeter 2 through the ninth valve 10; the fifth valve 7 connected with the pipeline between the test valve 4 and the fourth valve 5 through the tenth valve 8 and the eleventh valve 9 in turn.

[0025] The inlet of the inlet buffer container 12 is connected with the outlet of the outlet buffer tank container 14 through the twelfth valve 15; the pipeline between the fourth valve 5 and the inlet of the test pump 6 is provided with the test pump inlet pressure gauge 18 and the test pump inlet temperature probe 27; the pipeline between the outlet of the test pump 6 and the fifth valve 7 is provided with the test pump outlet pressure gauge 29 and the test pump outlet temperature probe 28; the inlet buffer container 12 is provided with the test valve inlet pressure gauge 26; the outlet buffer tank container 14 is provided with the test valve outlet pressure gauge 25.

[0026] The second valve 1, the first valve 11, the third valve 3, the fourth valve 5, the fifth valve 7, the sixth valve 13, the seventh valve 16, the eighth valve 17, the ninth valve 10, the tenth valve 8, the eleventh valve 9, the twelfth valve 15, the flowmeter 2, the test valve 4, the test pump 6, the inlet buffer container 12, the outlet buffer tank container 14, the material receiving container and the refrigeration device 19, the evacuation pump 20, the feed container 21, the air filter 22 and the pipeline are all provided with the heating device, and the heating device is externally provided with the heat preservation layer. The heating device is an electric heating device, and the heat preservation layer is an rubber-plastic sponge heat preservation layer.

[0027] It should be noted that the foregoing embodiment is based on the general pump valve performance test platform, and the evacuation device, the feeding device, the heating device, the heat preservation facility and the material collecting device are added. The evacuation device selects the slide valve type vacuum pump, the feeding device adopts the 24L container in the uranium enrichment industry, the electric companion heating device is wound outside the container, and finally the rubber sponge heat preservation layer is added; the heating device of the whole platform adopts the electric companion heating, which is laid on the surface of all valves, pipelines and equipment needing heating; the heat preservation facility adopts the rubber sponge, which is laid on the surface of all pipelines, valves and equipment. The material collecting device selects the 24L container in the uranium enrichment industry, which is placed in the low temperature dewar flask when collecting material. By providing appropriate heating, cooling and heat preservation devices in the uranium enrichment simulation gas test platform, the temperature requirements in the process of testing the pump and valve with simulation gas are met, and the normal phase state in the process of simulation gas feeding, collecting and testing is controlled, which ensures the normal testing and obtains accurate test data.

[0028] The specific operation process of the foregoing uranium enrichment pump and valve simulation test platform is basically the same as the general one, wherein the test process of the test pump includes the following steps:

[0029] 1) Check the closed tenth valve 8, eleventh valve 9, ninth valve 10, twelfth valve 15, seventh valve 16, eighth valve 17, air filter valve 23, feeding container valve 24, start the evacuation pump 20, seventh valve 16, evacuate the whole system, and when the pressure is lower than 0.2 Torr, close the seventh valve 16 and stop the evacuation pump 20.

[0030] 2) Open the feeding container valve 24, and the feeding container fills the medium into the inlet buffer container 12, and observe the pressure gauge of the test valve inlet pressure gauge 26. When the pressure is not enough, the heating device can be started to heat to 50 degrees. When the pressure reaches the required value, stop heating and close the feeding container valve 24.

[0031] 3) Start the test pump, open the twelfth valve 15, and continuously test the test pump 6.

[0032] 4) After the test is completed, stop the test pump 6, freeze the material collecting container, and the freezing temperature is-180 degrees. After 5 hours of freezing, open the eighth valve 17, collect the material, and continuously freeze. After the material collection is completed, close the eighth valve 17 and stop freezing.

[0033] Test process of test valve flow:

[0034] 1) Check and close the tenth valve 8, the eleventh valve 9, the ninth valve 10, the twelfth valve 15, the seventh valve 16, the eighth valve 17, the air filter valve 23, and the feed container valve 24, check that the flow meter 2 is working properly, start the evacuation pump 20, open the seventh valve 16, and observe the pressure drop on the test valve inlet pressure gauge 26.

[0035] 2) Control the opening of the air filter valve 23, observe the changes in the reading of the flow meter 2, record the data of the pressure before and after the test valve 4, and draw a flow curve.

[0036] Through the above-mentioned test operations, it is not difficult to find that the above-mentioned embodiment ensures the temperature requirements during the test of the vacuum pump valve using simulated gas by configuring suitable heating, cooling and insulation devices, and thus effectively controls the normal physical phase state during the simulated gas feeding, receiving and testing process, ensuring the normal progress of the test and obtaining accurate test data.

[0037] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A uranium enrichment pump and valve simulation test platform, characterized by: It comprises an inlet buffer container (12), a test pump (6), an outlet buffer tank container (14), a feed container (21) and an air filter (22) connected to the inlet of the inlet buffer container (12) through a feed container valve (24) and an air filter valve (23), respectively; the outlet of the inlet buffer container (12) is connected to a flow meter (2) through a first valve (11) and a second valve (1), the flow meter (2) is connected to a test valve (4) through a third valve (3), the test valve (4) is connected to the inlet of the test pump (6) through a fourth valve (5), the outlet of the test pump (6) is connected to the outlet buffer tank container (14) through a fifth valve (7) and a sixth valve (13), the outlet of the outlet buffer tank container (14) is connected to an evacuation pump (20), a material receiving container and a freezing device (19) through a seventh valve (16) and an eighth valve (17), respectively; The fifth valve (7) is connected to the pipeline between the second valve (1) and the flow meter (2) through a ninth valve (10); The fifth valve (7) is connected to the pipeline between the test valve (4) and the fourth valve (5) in sequence through the tenth valve (8) and the eleventh valve (9); The inlet of the inlet buffer container (12) is connected to the outlet of the outlet buffer tank container (14) via a twelfth valve (15); A test pump inlet pressure gauge (18) and a test pump inlet temperature probe (27) are provided on the pipeline between the fourth valve (5) and the inlet of the test pump (6); A test pump outlet pressure gauge (29) and a test pump outlet temperature probe (28) are provided on the pipeline between the outlet of the test pump (6) and the fifth valve (7); The inlet buffer container (12) is provided with a test valve inlet pressure gauge (26); the outlet buffer tank container (14) is provided with a test valve outlet pressure gauge (25); The second valve (1), the first valve (11), the third valve (3), the fourth valve (5), the fifth valve (7), the sixth valve (13), the seventh valve (16), the eighth valve (17), the ninth valve (10), the tenth valve (8), the eleventh valve (9), the twelfth valve (15), the flow meter (2), the test valve (4), the test pump (6), the inlet buffer container (12), the outlet buffer tank container (14), the material receiving container and the freezing device (19), the evacuation pump (20), the material supply container (21), the air filter (22) and the pipeline are all provided with a heating device, and the heating device is provided with an insulation layer on the outside; The feed container (21) adopts a 24L container used in the uranium enrichment industry.

2. The uranium enrichment pump and valve simulation test platform according to claim 1, characterized in that: The heating device is an electric heating device.

3. The uranium enrichment pump and valve simulation test platform according to claim 1 or 2, characterized in that: The thermal insulation layer is a rubber-plastic sponge thermal insulation layer.

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