Valve service life test circulating system

Abstract

The utility model discloses a valve life test circulating system, which comprises a stirrer connected with a slurry pump, the slurry pump is connected with a flow meter and a valve front pressure gauge and is divided into two sections of pipelines through a first ceramic tee joint, one section is connected with a valve front switch valve, a test valve and a valve back switch valve, and the other section is connected with a circulating standby valve and an expansion joint. The two sections of pipelines are connected with a valve rear pressure gauge after being converged through a ceramic tee joint, and then are divided into two sections of pipelines by a second ceramic tee joint, one section is connected with a discharge valve, a discharge pool is communicated behind the discharge valve, and the other section is connected with a block valve and then is connected to a stirrer. According to the utility model, mixing and automatic circulation of liquid-solid two-phase media can be realized. After the test valve is installed and the discharge switch valve is closed, a slag slurry medium in the system can automatically circulate, and the service life of the valve in media with different performances can be detected by adjusting different opening degrees of the test valve, so that a clearer experimental result is provided for verification of a scheme of a novel structure of the valve; and the verification period of a new product scheme of the ceramic valve is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of valve testing, in particular to a valve life testing circulation system. Background Art

[0002] With the continuous development of ceramic valves, their market share has gradually increased. Ceramic valves, thanks to their superior performance in high-temperature resistance, wear resistance, and corrosion resistance, are playing an increasingly important role in various complex working conditions. At the same time, these complex working conditions also place greater demands on ceramic valves. With the emergence of various new demands, research on innovative ceramic valves has never ceased. Currently, there is an urgent need to design a continuous-operation liquid-solid two-phase mixed medium circulation test system specifically for testing the service life of new ceramic valves, especially for life testing of such valves' wear and erosion resistance. Utility Model Content

[0003] In order to solve the technical problems mentioned in the background technology, the utility model provides a valve life test circulation system.

[0004] The utility model adopts the following technical solution: a valve life test circulation system, including a stirrer for mixing media;

[0005] The downstream of the mixer is connected to a slurry pump via a ceramic pipeline;

[0006] The downstream pipeline of the slurry pump is connected to a flow meter and a pressure gauge before the valve;

[0007] The ceramic pipeline is divided into two sections through the first ceramic tee;

[0008] One section connects the on-off valve before the valve, the test valve, and the on-off valve after the valve;

[0009] One section is connected with circulation spare valve and expansion joint;

[0010] After the two sections of pipeline are merged through the ceramic tee, they are connected to the pressure gauge after the valve;

[0011] The ceramic pipeline is then divided into two sections by the second ceramic tee;

[0012] One section is connected to a discharge valve, and the discharge valve is connected to a discharge tank;

[0013] One section is connected to the shut-off valve and then to the mixer inlet;

[0014] The ceramic pipeline is provided with a ceramic elbow at a bend.

[0015] Furthermore, the agitator includes a tank body; the inner wall of the tank body is affixed with a ceramic lining; a top cover is sealed on the top of the tank body; a feeding port is opened on the top cover; the feeding port is sealed by a feeding blind plate; a variable frequency motor is fixed on the top cover, and drives the agitator arranged in the tank body to rotate through a transmission shaft.

[0016] Furthermore, the ceramic elbow includes a metal tube; both ends of the metal tube are provided with connecting joints for connecting ceramic pipelines; the inner wall of the metal tube is attached with a structural ceramic lining; and ceramic glue is tightly attached between the inner wall of the metal tube and the structural ceramic lining.

[0017] Compared with existing technologies, the advantages of this utility model lie in the following: the valve life test circulation system designed in this utility model can achieve the mixing and automatic circulation of liquid-solid two-phase media. After installing the test valve and closing the discharge on-off valve, the slurry medium in the entire system can be automatically circulated. By adjusting the opening of the test valve to different degrees and observing the scour resistance time of different valves under the same pressure conditions, the service life of the valve in media with different performance can be tested. This provides clearer experimental results for the verification of new valve structure solutions and shortens the verification cycle of new ceramic valve product solutions. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the valve life test circulation system of the utility model;

[0019] Figure 2 This is a schematic diagram of the overall structure of the mixer of the present invention;

[0020] Figure 3 This is a schematic diagram of the overall structure of the ceramic elbow of the present invention.

[0021] in:

[0022] 1- mixer, 2- slurry pump, 3- flow meter, 4- pressure gauge before valve, 5- first ceramic tee, 6- switch valve before valve, 7- test valve, 8- switch valve after valve, 9- circulation backup valve, 10- expansion joint, 11- second ceramic tee, 12- pressure gauge after valve, 13- discharge valve, 14- discharge tank, 15- cut-off valve, 16- ceramic pipeline, 17- ceramic elbow,

[0023] 1-1 tank body, 1-2 ceramic lining, 1-3 upper cover, 1-4 feeding blind plate, 1-5 frequency conversion motor, 1-6 transmission shaft, 1-7 agitator,

[0024] 17-1 Metal tube, 17-2 Structural ceramics, 17-3 Ceramic glue. DETAILED DESCRIPTION

[0025] In order to facilitate those skilled in the art to understand the technical solution of the present invention, the following is further described with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention.

[0026] In the following detailed description, for ease of explanation, numerous specific details are set forth to provide a comprehensive understanding of the embodiments of the present invention. However, it will be apparent that one or more embodiments may be practiced without these specific details. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concepts of the present invention.

[0027] like Figure 1 Figure 1 shows the overall structure of the valve life test circulation system of the present invention, which includes a mixer 1 and a slurry pump 2. The mixer 1 is used to prevent solid-phase particle deposition within the mixed medium. The outlet of the mixer 1 is connected to the slurry pump 2, which provides power for the entire slurry circulation. A flowmeter 3 is installed below the slurry pump 2 to monitor the flow rate within the system in real time. A pre-valve pressure gauge 4 and a post-valve pressure gauge 12 are also provided. After installing the test valve 7 and preparing to test its service life, the circulation backup valve 9 is closed, and the pre-valve on / off valve 6 and post-valve on / off valve 8 are opened. The difference between the pre-valve and post-valve pressures represents the pressure differential across the test valve 7. A timing unit is used to measure the flushing time of the test valve 7 under the same pressure conditions to confirm the service life of the test valve in media with different properties. An expansion joint 10 is also installed in the circulation backup valve 9 pipeline to compensate for the effects of temperature on pipeline stress and prevent thermal deformation of the ceramic pipeline. Closing the entire circulation pipeline when replacing the test valve 7 can easily cause solid-phase deposition in the pipeline. At this time, the pre-valve on-off valve 6 and the post-valve on-off valve 8 can be closed, and the circulation standby valve 9 can be opened. The slurry in the system can still circulate, so the solid phase particles of the slurry are not easy to settle.

[0028] To facilitate complete drainage of the medium in the circulation pipeline and replacement of the experimental medium, this embodiment is equipped with a discharge valve 13, a drain tank 14, and a shutoff valve 15. During normal circulation testing, the discharge valve 13 is closed and the shutoff valve 15 is opened. Under the action of the slurry pump 2, the slurry circulates within the system. To empty the slurry from the circulation system and replace it with new medium, simply open the discharge valve 13 and close the shutoff valve 15 to drain the entire system into the drain tank 14.

[0029] like Figure 2As shown, in this embodiment, the mixer 1 includes a tank body 1-1, a ceramic lining 1-2, an upper cover 1-3, a charging blind plate 1-4, a variable frequency motor 1-5, a transmission shaft 1-6, and an agitator 1-7. The tank body 1-1 is made of metal, and its inner wall is attached with a ceramic lining 1-2 to improve the wear resistance of the tank body and extend its service life. The upper cover 1-3 ensures the sealing of the system, and a charging port is left on its top, which is sealed by a charging blind plate. When the charging blind plate is opened, the solid-liquid two-phase medium can be added to the system through the charging port. The variable frequency motor 1-5 can adjust the speed as needed and drive the agitator 1-7 to rotate through the transmission shaft 1-6 to meet the use requirements of various flow rates. The agitator 1-7 is made of metal and its surface is sprayed with hard alloy, which improves its wear resistance when in contact with the medium and increases its service life. If new medium is needed, the charging blind plate 1-4 can be opened and new medium can be added to the tank body 1-1 according to different proportions.

[0030] like Figure 3 As shown, in this embodiment, ceramic elbow 17 primarily comprises a metal tube 17-1, a structural ceramic lining 17-2, and ceramic adhesive 17-3. Metal tube 17-1 provides sufficient overall strength, while structural ceramic lining 17-2 improves the wear resistance of metal tube 17-1. Ceramic adhesive 17-3 secures structural ceramic lining 17-2 to metal tube 17-1. The excellent wear resistance of structural ceramic lining 17-2 significantly extends the service life of ceramic elbow 17.

[0031] In summary, the valve life test circulation system provided by this utility model can achieve the mixing and automatic circulation of liquid-solid two-phase media. After installing the test valve and closing the discharge on-off valve, the slurry medium in the entire system can be automatically circulated. By adjusting the test valve opening to different degrees and observing the scour resistance of different valves under the same pressure conditions, the service life of the valve in media with different performance can be tested. This provides clearer experimental results for the verification of new valve structures and shortens the verification cycle of new ceramic valve product solutions.

[0032] The above embodiments are merely descriptions of preferred implementation methods of the present invention and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the scope of protection determined by the claims of the present invention.

Claims

1. A valve life test cycle system, characterized in that: A mixer (1) for mixing the medium is included; The downstream of the mixer (1) is connected to a slurry pump (2) via a ceramic pipeline (16); The downstream pipeline of the slurry pump (2) is connected to a flow meter (3) and a pressure gauge (4) before the valve; The ceramic pipeline (16) is divided into two sections of pipelines through the first ceramic tee (5); One section connects the front-valve on-off valve (6), the test valve (7), and the rear-valve on-off valve (8); A first stage connecting a circulation standby valve (9) and an expansion joint (10); After the two sections of pipeline are merged through the ceramic tee (11), they are connected to the pressure gauge (12) after the valve; The ceramic pipeline (16) is further divided into two sections by the second ceramic tee (11); One section is connected to a discharge valve (13), and the discharge valve (13) is connected to a discharge tank (14); One section is connected to the shutoff valve (15) and then to the inlet of the mixer (1); The ceramic pipeline (16) is provided with a ceramic elbow (17) at a turning point.

2. The valve life test cycle system according to claim 1, characterized in that: The mixer (1) comprises a tank body (1-1); the inner wall of the tank body (1-1) is affixed with a ceramic lining (1-2); the top of the tank body (1-1) is sealed with an upper cover (1-3); the upper cover (1-3) is provided with a feeding port; the feeding port is sealed by a feeding blind plate (1-4); a variable frequency motor (1-5) is fixed on the upper cover (1-3) and drives a mixer (1-7) arranged in the tank body (1-1) to rotate via a transmission shaft (1-6).

3. The valve life test cycle system according to claim 2, characterized in that: The ceramic elbow (17) comprises a metal tube (17-1); connecting joints for connecting to a ceramic pipeline (16) are provided at both ends of the metal tube (17-1); a structural ceramic lining (17-2) is adhered to the inner wall of the metal tube (17-1); and ceramic glue (17-3) is tightly adhered between the inner wall of the metal tube (17-1) and the structural ceramic lining (17-2).

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