A pump shell water seal pressure testing device

Abstract

The utility model discloses a kind of pump shell water seal pressure testing device, it is related to pump class spare part detection equipment technical field, to solve the problem of existing device pipeline dismounting cumbersome, pump shell docking deviation big. The device includes lifting frame, fixed frame, fixed plate and servo motor are equipped on lifting frame, fixed plate is connected lifting frame by air cylinder, lifting frame is matched with T-shaped link frame, link frame is matched with the T-shaped fixed sleeve on fixed plate;Servo motor connects double-end screw rod, nut is sleeved on screw rod, nut connects moving frame, moving frame is equipped pipeline and U-shaped interface, slidingly penetrating the positioning frame with spring on moving frame, nut is equipped with positioning groove;Lifting frame is equipped with limiting rod and support frame, pipeline is erected on support frame. When working, pump shell is placed on lifting frame and is connected with pipeline, screw rod drives pipeline and pump shell flange connection, after water injection pressurization, leak detection is carried out by coating soap water;Lifting positioning frame can dismantle moving frame and pipeline. The device realizes pipeline quick dismounting, greatly shortens operating time, and improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of pump component testing equipment, and in particular to a pump casing water seal pressure testing device. Background Technology

[0002] A pump casing water seal pressure test device is a specialized piece of equipment that simulates the pressure environment of the pump casing during actual operation by injecting pressurized water into it, thereby detecting any leaks, deformations, or other problems. Its core function is to verify the structural strength and sealing performance of the pump casing, ensuring that media leakage does not occur due to seal failure after assembly. It is a crucial step in quality control for pump products and is widely used in pump production and maintenance processes.

[0003] Existing pump casing water seal pressure testing devices have shortcomings in practical applications: most devices adopt a fixed pipeline design, with the pipeline and the main body of the device being an integrated structure. When it is necessary to replace the pressure testing pipeline with a different specification (to adapt to different pump casing models) or to perform maintenance and repair on the pipeline, it is necessary to disassemble some components of the entire device, which is cumbersome, time-consuming, and affects the testing efficiency. In order to improve this, a pump casing water seal pressure testing device is proposed here. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pump casing water seal pressure testing device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A pump casing water seal pressure testing device includes a hoisting frame, on which a fixed frame and a fixed plate are fixedly mounted. A lifting frame is provided below the fixed plate via a cylinder. A double-headed screw is mounted on the hoisting frame via a servo motor. A nut is threaded onto the double-headed screw. A movable frame is mounted on the nut. A positioning frame is slidably mounted on the movable frame. A positioning groove is provided on the nut. A pipeline is fixedly mounted on the movable frame.

[0007] Preferably, a fixing sleeve is fixedly provided on the fixing plate, and a connecting frame is provided inside the fixing sleeve. The end of the connecting frame is fixedly connected to the lifting frame.

[0008] Preferably, a limiting rod is fixed inside the hoisting frame, and the limiting rod is parallel to the double-ended screw and slides through the nut.

[0009] Preferably, a spring is sleeved on the outside of the positioning frame rod, and the two ends of the spring are respectively connected to the outer wall of the moving frame and the outer wall of the positioning frame head.

[0010] Preferably, a support frame is fixedly provided on the hoisting frame, and the horizontal part of the pipeline is arranged on the support frame.

[0011] Preferably, the movable frame is provided with a connecting port, which is U-shaped.

[0012] The beneficial effects of this utility model are:

[0013] 1. By using the positioning frame, spring and positioning groove in combination, as well as the detachable connection of the U-shaped connector and nut on the moving frame, the pipeline and the main body of the device can be quickly disassembled and assembled. When it is necessary to replace the pipeline or perform maintenance, it is only necessary to lift the positioning frame and move the moving frame to complete the disassembly. There is no need to adjust the entire device, which greatly shortens the operation time and improves the testing efficiency.

[0014] 2. The pump casing is automatically raised by a cylinder-driven lifting frame, eliminating the need for manual handling and alignment of the pump casing with the interface, significantly reducing the labor intensity of operators; and the spacing between the two pipelines can be mechanically adjusted to adapt to different pump casings within a certain range, ensuring equipment applicability. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of a pump casing water seal pressure testing device proposed in this utility model;

[0016] Figure 2 for Figure 1 A schematic diagram of the left-side view structure;

[0017] Figure 3 for Figure 1 Schematic diagram of the vertical section structure viewed from the right;

[0018] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;

[0019] Figure 5 This is a vertical sectional view of the fixing sleeve and the connecting frame.

[0020] In the diagram: 1. Lifting frame, 2. Fixed frame, 3. Servo motor, 4. Fixed plate, 5. Cylinder, 6. Lifting frame, 7. Fixed sleeve, 8. Connecting frame, 9. Support frame, 10. Pipeline, 11. Moving frame, 12. Double-ended screw, 13. Nut, 14. Limiting rod, 15. Positioning frame, 16. Spring, 17. Positioning groove, 18. Connection port. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0022] Reference Figure 1-5A pump casing water seal pressure test device includes a hoisting frame 1, on which a fixing frame 2 and a fixing plate 4 are fixedly mounted. The fixing frame 2 is L-shaped and has an installation port, which can be used with expansion bolts and other components to connect the hoisting frame 1 and other components to the top of the workshop.

[0023] Below the fixed plate 4, a lifting frame 6 is provided via a cylinder 5. A double-headed screw 12 is provided on the hoisting frame 1 via a servo motor 3. A nut 13 is threaded onto the double-headed screw 12. A movable frame 11 is installed on the nut 13. A positioning frame 15 is slidably provided through the movable frame 11. A positioning groove 17 is provided on the nut 13. A pipe 10 is fixedly provided on the movable frame 11.

[0024] As shown in the figure, there are two pipes 10, which are connected to the inlet and outlet of the pump casing to be tested via flanges and bolts. One pipe 10 can be connected to the pump body and pressurization equipment in the prior art, while the other pipe 10 initially discharges gas and finally discharges test water. Pressure monitoring can also be achieved by installing pressure gauges and other mature components in the prior art on pipe 10. These components are commonly used in pump casing water seal pressure testing devices and are mature equipment in the prior art. This solution does not address any issues with these components or propose improvements; therefore, their specific structure and working principle will not be described in detail here. For more information, please refer to the existing technology.

[0025] The pump casing to be tested can be placed on the upper surface of the horizontal part of the lifting frame 6 and raised by the cylinder 5 until its inlet and outlet correspond to the two pipelines 10.

[0026] A fixing sleeve 7 is fixedly mounted on the fixing plate 4. A connecting frame 8 is provided inside the fixing sleeve 7, and the end of the connecting frame 8 is fixedly connected to the lifting frame 6. The empty part inside the fixing sleeve 7 is T-shaped, and the connecting frame 8 is also T-shaped. When the two are used together, the connecting frame 8 cannot be separated from the fixing sleeve 7, and the stability of the vertical lifting trajectory of the lifting frame 6 is ensured.

[0027] A limiting rod 14 is fixedly installed inside the hoisting frame 1. The limiting rod 14 is parallel to the double-ended screw 12 and slides through the nut 13. The function of the limiting rod 14 is to limit the nut 13 and prevent it from rotating with the double-ended screw 12.

[0028] A spring 16 is sleeved on the outside of the rod of the positioning frame 15. The two ends of the spring 16 are connected to the outer wall of the moving frame 11 and the outer wall of the head of the positioning frame 15, respectively. The elastic potential energy provided by the spring 16 enables the positioning frame 15 to be dragged, ensuring that its rod can be stably placed in the positioning groove 17 of the nut 13 when no external force is involved. At this time, the moving frame 11 cannot move horizontally and disengage from the nut 13.

[0029] A support frame 9 is fixedly mounted on the hoisting frame 1, and the horizontal portion of the pipe 10 is mounted on the support frame 9. The support frame 9 supports the pipe 10, preventing the movable frame 11 from bearing too much weight, enhancing the stability of the pipe 10, and also making it easy for the pipe 10 to detach from the support frame 9. It is L-shaped, with an arc design at its corners to fit the outer wall of the pipe 10.

[0030] The movable frame 11 is provided with a connecting port 18, which is U-shaped. For details, please refer to the attached drawing. Once the movable frame 11 moves horizontally, the nut 13 can be disengaged from the connecting port 18 on the movable frame 11.

[0031] All standard parts used in this application can be purchased from the market, and can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art. The control method is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art and is common knowledge in the field. Since this application is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail in this application.

[0032] Working principle of this utility model:

[0033] Place the pump casing to be tested on the upper surface of the horizontal part of the lifting frame 6, start the cylinder 5, the cylinder drives the lifting frame 6 to rise vertically until the water inlet and outlet of the pump casing are aligned with the interfaces of the two pipes 10, then the cylinder 5 can be turned off.

[0034] Start the servo motor 3 on the hoisting frame 1. The servo motor 3 drives the double-headed screw 12 to rotate. The limit rod 14 can restrict the nut 13 to rotate synchronously with the double-headed screw 12. It can only move horizontally along the axis of the double-headed screw 12. When the nut 13 moves, it drives the moving frame 11 connected to it to move synchronously. This pushes the pipeline 10 on the moving frame 11 closer to the pump casing until the flange of the pipeline 10 is completely fitted with the inlet flange and outlet flange of the pump casing. The flange is then tightened with bolts to achieve a sealed connection between the pipeline 10 and the pump casing.

[0035] Water is injected into the pump casing by connecting an external pressurizing device and a water source through one of the pipes 10. At the same time, the valve of the other pipe 10 is opened to purge air from the pump casing and pipe 10 (close the valve when no air bubbles are observed flowing out of the outlet of pipe 10). Water is continued to be supplied into the pump casing through the pressurizing device, and the internal pressure of the pump casing is monitored in real time using a pressure gauge on pipe 10. When the pressure reaches the preset test pressure value (usually 1.2-1.5 times the rated working pressure of the pump casing), water supply is stopped and pressure is maintained. During the pressure maintenance period, soapy water is applied to key parts of the pump casing such as welds and flange interfaces. If no air bubbles are observed on the surface of the soapy water and the pressure gauge reading does not drop significantly (within the industry's allowable pressure drop range), the pump casing sealing performance is deemed qualified. Conversely, if air bubbles appear or the pressure drops, the seal is deemed to have failed.

[0036] After the pressure test is completed, first open the valve on the pipeline 10 to release the pressure. After the pressure drops to normal pressure, remove the bolts between the pipeline 10 and the pump casing flange. If the pipeline 10 needs maintenance or replacement, the positioning frame 15 can be lifted. The positioning frame 15 tension spring 16 will disengage its rod from the positioning groove 17 on the nut 13. Then, the moving frame 11 is moved horizontally so that the U-shaped connector 18 on the moving frame 11 is completely disengaged from the nut 13. The pipeline 10 can then be removed from the lifting frame 1 together with the moving frame 11. After maintenance or replacement is completed, the reverse operation can be performed to reassemble the pipeline.

[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pump casing water seal pressure testing device, comprising a lifting frame (1), characterized in that, The hoisting frame (1) is fixedly provided with a fixed frame (2) and a fixed plate (4). A lifting frame (6) is provided below the fixed plate (4) via a cylinder (5). A double-headed screw (12) is provided on the hoisting frame (1) via a servo motor (3). A nut (13) is threaded on the double-headed screw (12). A movable frame (11) is installed on the nut (13). A positioning frame (15) is slidably provided on the movable frame (11). A positioning groove (17) is provided on the nut (13). A pipeline (10) is fixedly provided on the movable frame (11).

2. The pump casing water seal pressure testing device according to claim 1, characterized in that, A fixing sleeve (7) is fixedly provided on the fixing plate (4), and a connecting frame (8) is provided inside the fixing sleeve (7). The end of the connecting frame (8) is fixedly connected to the lifting frame (6).

3. The pump casing water seal pressure testing device according to claim 2, characterized in that, The hoisting frame (1) is fixedly provided with a limiting rod (14), which is parallel to the double-headed screw (12) and slides through the nut (13).

4. The pump casing water seal pressure testing device according to claim 3, characterized in that, A spring (16) is sleeved on the outside of the rod of the positioning frame (15), and the two ends of the spring (16) are respectively connected to the outer wall of the moving frame (11) and the outer wall of the head of the positioning frame (15).

5. The pump casing water seal pressure testing device according to claim 4, characterized in that, The hoisting frame (1) is fixedly provided with a support frame (9), and the horizontal part of the pipeline (10) is set on the support frame (9).

6. The pump casing water seal pressure testing device according to claim 5, characterized in that, The mobile frame (11) is provided with a connecting port (18), which is U-shaped.

Images