A vertical test device for end disc type screw pumps

Abstract

The application discloses a kind of end disc type screw pump vertical test device, including test screw pump and test oil tank;The top of test screw pump is equipped with test motor for driving test screw pump to run;Test oil tank is also equipped with inlet pipeline, and inlet pipeline is connected with the oil inlet of test screw pump;Inlet pipeline is equipped with inlet pipeline adjusting mechanism, which can connect inlet pipeline with oil inlet at different positions;Test oil tank is also equipped with outlet pipeline, and outlet pipeline is connected with the oil outlet of test screw pump;Outlet pipeline is also equipped with outlet pipeline adjusting mechanism, which can connect outlet pipeline with oil outlet at different positions.The application can meet the test requirements of different specifications of end disc type screw pump, so that a set of test device can quickly meet the test work of various inlet and outlet direction combination modes of different specifications of end disc type screw pump, improve efficiency, save cost, better meet the efficient output of end disc type screw pump.

Description

Technical Field

[0001] This invention relates to the field of screw pump testing technology, and more specifically, to a vertical testing device for end-plate type screw pumps. Background Technology

[0002] In conventional end-plate screw pumps, the inlet and outlet directions can be rotated and fixed every 90° in the circumferential direction. Therefore, the inlet and outlet of the end-plate screw pump can form four directions: up, down, left, and right (defined as viewed from the drive end (motor) towards the screw pump). This results in 16 (=4×4) possible combinations of inlet and outlet directions for the end-plate screw pump. At the same time, the outlet of the end-plate screw pump also has two forms: horizontal inlet and vertical inlet. Thus, the end-plate screw pump can ultimately form 32 (=4×4×2) possible combinations of inlet and outlet directions. These combinations are adjusted according to user requirements before leaving the factory and are actually used in user sites.

[0003] While end-plate screw pumps offer flexible inlet and outlet combinations, providing great convenience to users, the variety of these combinations can cause significant inconvenience in actual production, particularly during testing. Due to the fixed nature of the test bench, the inlet and outlet pipes are relatively fixed and cannot be easily adjusted. This fixed piping conflict with the multiple inlet and outlet combinations of the end-plate screw pump, significantly increasing testing time, reducing efficiency, and extending the overall production time for this type of product. This conflict becomes even more pronounced when multiple inlet and outlet combinations exist within the same batch of products.

[0004] Therefore, how to provide a testing device that can be effectively applied to various outlet combinations of screw pumps has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical testing device for end-plate type screw pumps to solve the problems mentioned in the background art.

[0006] According to one aspect of the present invention, a vertical testing device for an end-plate type screw pump is provided, comprising a test screw pump and a test oil tank;

[0007] The test oil tank is provided with a support base, the test screw pump is fixed vertically on the support base, and the top of the test screw pump is provided with a test motor to drive the test screw pump to run;

[0008] The test oil tank is also equipped with an inlet pipe, which is connected to the oil inlet of the test screw pump to input the oil in the test oil tank into the test screw pump; the inlet pipe is equipped with an inlet pipe adjustment mechanism, which enables the inlet pipe to be connected to oil inlets at different positions;

[0009] The test oil tank is also equipped with an outlet pipe, which is connected to the oil outlet of the test screw pump to output the oil in the test screw pump to the test oil tank, and to test the performance parameters of the test screw pump; the outlet pipe is also equipped with an outlet pipe adjustment mechanism, which enables the outlet pipe to be connected to the oil outlet at different positions.

[0010] Optionally, in the vertical test device for end-plate type screw pump according to the present invention, the inlet pipeline includes an inlet straight connector, an inlet elbow connector, and an inlet pressure regulating valve. The two ends of the inlet pressure regulating valve are respectively connected to the inlet straight connector and the inlet elbow connector via connecting flanges. The inlet straight connector is connected to the oil inlet of the test screw pump. A connector adjustment hole is provided on the test oil tank, and the inlet elbow connector extends into the test oil tank through the connector adjustment hole.

[0011] Optionally, according to the vertical testing device for end-plate type screw pumps of the present invention, the inlet pipeline further includes an inlet pipeline adjustment mechanism, which includes an inlet slide rail and an inlet mounting plate;

[0012] The connector adjustment hole has an oblong groove structure, and the inlet slide rail is arranged parallel to the test oil tank along the length direction of the connector adjustment hole; the inlet mounting plate is arranged on the inlet slide rail and can slide, and the inlet mounting plate is also provided with an inlet screw bracket, the top of the inlet screw bracket being connected to the inlet pressure regulating valve;

[0013] The imported lead screw bracket can adjust the height of the imported pressure regulating valve from the test oil tank via a lead screw thread connection, and the imported mounting plate can adjust the distance between the imported pressure regulating valve and the test screw pump.

[0014] Optionally, according to the vertical test device for end-plate type screw pumps of the present invention, the inlet direct head is further provided with an inlet pressure gauge to detect the oil pressure of the inlet pipeline in real time.

[0015] Optionally, according to the vertical test device for end-plate type screw pumps of the present invention, the outlet pipeline includes an outlet straight connector, an outlet transition connector, an outlet pressure regulating valve, an outlet elbow connector, and an outlet mounting plate.

[0016] The test oil tank is provided with a first oil drain hole directly opposite the bottom of the test screw pump. One end of the outlet elbow is connected to the first oil drain hole, and the other end is connected to one end of the outlet pressure regulating valve through an outlet adjusting connector. The outlet adjusting connector is used to adjust the flow direction of the outlet elbow.

[0017] One end of the outlet direct connector is connected to the oil outlet of the test screw pump, and the outlet transition connector connects the other end of the outlet direct connector to the other end of the outlet pressure regulating valve. The outlet transition connector is used to change the oil flow path between the outlet pressure regulating valve and the outlet direct connector.

[0018] Optionally, in the vertical test device for end-plate type screw pump according to the present invention, an outlet rotary joint is further provided between the outlet direct head and the outlet transition joint, and the three are connected by a connecting flange. The outlet rotary joint is used to change the connection surface between the outlet direct head and the oil outlet.

[0019] Optionally, in the vertical test device for end-plate type screw pump according to the present invention, the outlet pipeline further includes an outlet pipeline adjustment mechanism, the outlet pipeline adjustment mechanism including a slewing bearing;

[0020] The slewing bearing is rotatably connected to the test oil tank, the outlet mounting plate is fixed to the slewing bearing, and the outlet mounting plate is provided with a second oil drain hole communicating with the first oil drain hole. The outlet elbow extends into the test oil tank through the second oil drain hole and the first oil drain hole, so that the outlet pipeline can rotate 360° in the circumferential direction, and the outlet straight head can correspond to any oil outlet in the circumferential direction of the test screw pump.

[0021] Optionally, in the vertical test device for end-plate type screw pump according to the present invention, the outlet pipeline adjustment mechanism further includes an outlet slide rail, an outlet mounting plate, and an outlet screw support.

[0022] The outlet mounting plate is disposed on one side of the outlet mounting disc, the outlet slide rail is disposed on the outlet mounting plate, the outlet screw bracket is slidably disposed on the outlet slide rail, and the top of the outlet screw bracket is connected to the side wall of the outlet transition joint to support the lower half of the outlet pipeline and drive the outlet pipeline along the outlet slide rail to adjust the distance between the outlet pressure regulating valve and the test screw pump; and the outlet screw bracket can adjust the height of the outlet pressure regulating valve from the test oil tank through the screw thread connection.

[0023] Optionally, according to the vertical test device for end-plate type screw pumps of the present invention, the outlet pipeline adjustment mechanism further includes a height adjustment frame, which is disposed on the outlet mounting plate and its top is connected to the side wall of the outlet adjustment joint to support the lower half of the outlet pipeline and adjust the depth of the outlet elbow into the test oil tank.

[0024] Optionally, according to the vertical test device for end-plate type screw pumps of the present invention, an outlet pressure gauge is further provided on the side wall of the outlet transition joint to detect the oil pressure of the outlet pipeline in real time.

[0025] This invention fixes the inlet and outlet direction combinations of the end-plate screw pump into four forms: same side, left side, right side, and opposite side (all relative to the inlet). By fixing the inlet direction during testing, the invention reduces the possibility of multiple inlet direction variations. An outlet rotary joint is installed at the outlet position, allowing the outlet head to rotate and accommodate both lateral and longitudinal outlet variations (the outlet rotary joint only needs to rotate 90°). Furthermore, an outlet mounting plate and slewing bearing are installed at the outlet position, allowing the outlet pipeline fixed to these components to rotate 360°, satisfying all four outlet directions. This enables rapid testing of all inlet and outlet direction combinations for the end-plate screw pump. Furthermore, by replacing the inlet and outlet direct heads, the testing requirements of different specifications of end-plate screw pumps can be met, expanding the application range of the testing device. This allows for the rapid testing of various inlet and outlet direction combinations of end-plate screw pumps of different specifications using a single testing device, improving efficiency, saving costs, and better meeting the high-efficiency output requirements of end-plate screw pumps.

[0026] Other features and advantages of the invention will become clear from the following detailed description of exemplary embodiments of the invention with reference to the accompanying drawings. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the invention and, together with their description, serve to explain the principles of the invention.

[0028] Figure 1 This is an overall schematic diagram of the vertical testing device for the end-plate type screw pump disclosed in this invention when the screw pump inlet and outlet are on the same side;

[0029] Figure 2 This is an enlarged schematic diagram of the vertical test device for the end plate type screw pump disclosed in this invention, when the screw pump has a horizontal outlet, installed in the test device.

[0030] Figure 3This is an enlarged schematic diagram of the vertical test device for the end plate type screw pump disclosed in this invention, when the screw pump has a longitudinal outlet form and is installed in the test device.

[0031] Figure 4 This is a schematic diagram of the test oil tank in the vertical test device for the end-plate type screw pump disclosed in this invention;

[0032] Figure 5 This is a schematic diagram of the outlet mounting plate in the vertical testing device for the end-plate type screw pump disclosed in this invention;

[0033] Figure 6 This is an overall schematic diagram of the vertical testing device for the end plate type screw pump disclosed in this invention when the screw pump inlet and outlet are on the right side.

[0034] Figure 7 This is an overall schematic diagram of the vertical testing device for the end-plate type screw pump disclosed in this invention when the screw pump inlet and outlet are on opposite sides;

[0035] Figure 8 This is a schematic diagram of the overall structure of the vertical testing device for the end-plate type screw pump disclosed in this invention, with the screw pump inlet and outlet on the left side.

[0036] Explanation of reference numerals in the attached drawings: 1. Test motor; 2. Test oil tank; 2.1. First drain hole; 2.2. Connector adjustment hole; 3. Support base; 4. Test screw pump; 5. Inlet straight head; 6. Inlet pressure gauge; 7. Inlet pressure regulating valve; 8. Inlet elbow; 9. Inlet screw bracket; 10. Inlet mounting plate; 11. Inlet slide rail; 12. Outlet straight head; 13. Outlet rotary joint; 14. Outlet transition joint; 15. Outlet pressure gauge; 16. Outlet pressure regulating valve; 17. Outlet adjusting joint; 18. Outlet elbow; 19. Outlet screw bracket; 20. Outlet mounting plate; 21. Outlet slide rail; 22. Height adjustment bracket; 23. Outlet mounting plate; 23.1. Second drain hole; 24. Slewing bearing. Detailed Implementation

[0037] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention.

[0038] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0039] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0040] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0042] according to Figures 1 to 8 As shown, the present invention provides a vertical testing device for an end-plate type screw pump, including a test screw pump 4 and a test oil tank 2.

[0043] The test oil tank 2 is equipped with a support base 3, and the test screw pump 4 is fixed vertically on the support base 3. The top of the test screw pump 4 is equipped with a test motor 1 that drives the test screw pump 4.

[0044] The test oil tank 2 is also equipped with an inlet pipe, which is connected to the oil inlet of the test screw pump 4 to input the oil in the test oil tank 2 into the test screw pump 4; the inlet pipe is equipped with an inlet pipe adjustment mechanism, which can connect the inlet pipe to the oil inlet at different positions.

[0045] The test oil tank 2 is also equipped with an outlet pipeline, which is connected to the oil outlet of the test screw pump 4 to input the oil in the test screw pump 4 into the test oil tank 2, and to test the performance parameters of the test screw pump 4. The outlet pipeline is also equipped with an outlet pipeline adjustment mechanism, which enables the outlet pipeline to be connected to the oil outlet at different positions.

[0046] In this embodiment, the inlet and outlet of the test screw pump 4 are generally located on the side wall. One end of the inlet pipe extends into the test oil tank 2, and the other end connects to the inlet of the test screw pump 4. One end of the outlet pipe extends into the test oil tank 2, and the other end connects to the outlet of the test screw pump 4. The test screw pump 4 is driven by the test motor 1, and the performance parameters of the test screw pump 4 are detected by the oil transport. Furthermore, the screw pump in this invention has a vertical structure, and the support base 3 is an overall U-shaped frame structure. The top surface supports the test screw pump 4 and the test motor 1, and the U-shaped opening provides the connection space between the test screw pump 4 and the inlet and outlet pipes. The inlet pipe adjustment mechanism and the outlet pipe adjustment mechanism adjust the position of the inlet and outlet pipes respectively, thereby connecting them to different inlet and outlet ports on the test screw pump 4, ensuring that the testing device disclosed in this invention is applicable to the performance parameters of most test screw pumps 4.

[0047] Furthermore, the inlet pipeline includes an inlet straight connector 5, an inlet elbow 8, and an inlet pressure regulating valve 7. The two ends of the inlet pressure regulating valve 7 are connected to the inlet straight connector 5 and the inlet elbow 8 respectively via connecting flanges. The inlet straight connector 5 is connected to the oil inlet of the test screw pump 4. The test oil tank 2 has a connector adjustment hole 2.2, through which the inlet elbow 8 extends into the test oil tank 2. In practice, the inlet elbow 8 has an L-shaped pipe structure, while the inlet straight connector 5 is a straight pipe mechanism. By changing the oil delivery path through the inlet elbow 8, the inlet pipeline can effectively connect the test oil tank 2 and the test screw pump 4.

[0048] Furthermore, the inlet pipeline also includes an inlet pipeline adjustment mechanism, which includes an inlet slide rail 11 and an inlet mounting plate 10; the connector adjustment hole 2.2 has an oblong groove structure, and the inlet slide rail 11 is arranged parallel to the length direction of the connector adjustment hole 2.2 on the test oil tank 2; the inlet mounting plate 10 is arranged on the inlet slide rail 11 and can slide, and the inlet mounting plate 10 is also provided with an inlet screw bracket 9, the top of which is connected to the inlet pressure regulating valve 7;

[0049] During implementation, the inlet pipeline needs to be adjusted according to the length of the inlet direct connector 5 and the position of the oil inlet on the test screw pump 4. During installation, the position of the test screw pump 4 is adjusted to ensure that its oil inlet faces the direction of the connector adjustment hole 2.2. The inlet mounting plate 10 can move along the inlet slide rail 11. The length direction of the connector adjustment hole 2.2 is the same as the movement direction of the inlet slide rail 11, so the inlet elbow 8 can move together with the inlet mounting plate 10, thereby adjusting the distance between the inlet pressure regulating valve 7 and the test screw pump 4, ensuring that the inlet direct connector 5 can connect to the oil inlet. In addition, the inlet screw bracket 9, through a screw thread connection, can adjust the height of the inlet pressure regulating valve 7 from the test oil tank 2, ensuring that the inlet direct connector 5 can correspond to different positions of the oil inlet on the test screw pump 4.

[0050] Furthermore, the inlet direct head 5 is also equipped with an inlet pressure gauge 6, located behind the inlet pressure regulating valve 7, to monitor the oil pressure in the inlet pipeline in real time. The inlet pressure regulating valve 7 is equipped with a handwheel that the operator can rotate to adjust the flow rate of oil through the inlet pipeline.

[0051] Furthermore, the outlet pipeline includes an outlet direct connector 12, an outlet transition connector 14, an outlet pressure regulating valve 16, an outlet elbow 18, and an outlet mounting plate 23; the test oil tank 2 is provided with a first drain hole 2.1 directly opposite the bottom of the test screw pump 4; one end of the outlet elbow 18 is connected to the first drain hole 2.1, and the other end is connected to one end of the outlet pressure regulating valve 16 through the outlet adjustment connector 17, which is used to adjust the flow direction of the outlet elbow 18; one end of the outlet direct connector 12 is connected to the oil outlet of the test screw pump 4, and the outlet transition connector 14 connects the other end of the outlet direct connector 12 to the other end of the outlet pressure regulating valve 16, and the outlet transition connector 14 is used to change the oil flow path between the outlet pressure regulating valve 16 and the outlet direct connector 12.

[0052] During implementation, since there are multiple combinations of the inlet and outlet positions on the test screw pump 4, one of which is that they are on the same side, to avoid interference with the inlet pipeline, the outlet transition joint 14 in this invention is essentially formed by two L-shaped pipes integrated together, changing the path of the outlet pipeline. Correspondingly, the outlet regulating joint 17 is a necessary design to accommodate the change in the outlet pipeline. Of course, the outlet transition joint 14 and the outlet regulating joint 17 are not limited to this single structure, and will not be elaborated further here.

[0053] Furthermore, an outlet rotary joint 13 is provided between the outlet direct connector 12 and the outlet transition joint 14, and the three are connected by a connecting flange. The outlet rotary joint 13 is used to change the connection surface between the outlet direct connector 12 and the oil outlet. In implementation, since the oil outlet of the test screw pump 4 has two forms, a horizontal outlet and a vertical outlet, although the main shape of the outlet is circular, the connection surface is a rectangular structure, mainly to ensure the fit of the connection surface, such as... Figure 2 and Figure 3 As shown. Due to the presence of the outlet rotary joint 13, the outlet direct head 12 can be rotated to satisfy the requirement that the outlet of the test screw pump 4 has both horizontal and vertical outlet forms (the outlet rotary joint 13 only needs to be rotated 90°).

[0054] Furthermore, the outlet pipeline also includes an outlet pipeline adjustment mechanism, which includes a slewing bearing 24. The slewing bearing 24 is rotatably connected to the test oil tank 2, and the outlet mounting plate 23 is fixed to the slewing bearing 24. The outlet mounting plate 23 is provided with a second oil drain hole 23.1 communicating with the first oil drain hole 2.1. The outlet elbow 18 passes through the second oil drain hole 23.1 and the first oil drain hole 2.1 and extends into the test oil tank 2. This allows the outlet pipeline to rotate 360° in the circumferential direction, and the outlet straight connector 12 can correspond to any oil outlet in the circumferential direction of the test screw pump 4. In implementation, since the position of the oil inlet of the test screw pump 4 is predetermined when it is fixed, the possible positions of the oil outlet include the side, rear, and same side of the oil inlet. The present invention provides a rotatable slewing bearing 24, an outlet mounting plate 23 for receiving the outlet pipeline, and because the aforementioned outlet transition joint 14 changes the path of the outlet pipeline, the outlet pipeline and the inlet pipeline can be prevented from intersecting and affecting each other during the rotation of the slewing bearing 24.

[0055] like Figure 1 As shown, when the test screw pump 4 has its inlet and outlet directions on the same side, simply rotate the slewing bearing 24 to rotate the entire outlet pipeline to the outlet direction of the test screw pump 4 and connect it thereto. This completes the test of the test screw pump 4 with its inlet and outlet directions on the same side. Figure 6 As shown, when the test screw pump 4 has a right-side inlet and outlet combination, simply rotate the slewing bearing 24 to rotate the entire outlet pipeline to the outlet direction of the test screw pump 4 and connect it thereto. This completes the test of the right-side inlet and outlet combination of the test screw pump 4. For example... Figure 7 As shown, when the test screw pump 4 has an inlet and outlet direction combination that is opposite, simply rotate the slewing bearing 24 to rotate the entire outlet pipeline to the outlet direction of the test screw pump 4 and connect it thereto. This completes the test of the opposite inlet and outlet direction combination of the test screw pump 4. For example... Figure 8 As shown, when the test screw pump 4 is in the left-side combination of inlet and outlet directions, simply rotate the slewing bearing 24 to rotate the entire outlet pipeline to the outlet direction of the test screw pump 4 and connect it thereto. This completes the test of the left-side combination of inlet and outlet directions of the test screw pump 4.

[0056] Furthermore, the aforementioned oil outlet positions can exist in multiple directions, including beside, behind, and on the same side as the oil inlet. Therefore, a rotatable slewing bearing 24 structure is provided. However, the oil outlet can also exist in different axial positions. Therefore, the outlet pipeline adjustment mechanism of the present invention also includes an outlet slide rail 21, an outlet mounting plate 20, and an outlet screw bracket 19. The outlet mounting plate 20 is located on one side of the outlet mounting plate 23, the outlet slide rail 21 is located on the outlet mounting plate 20, and the outlet screw bracket 19 is slidably located on the outlet slide rail 21. The top of the outlet screw bracket 19 is connected to the side wall of the outlet transition joint 14 to support the lower half of the outlet pipeline and drive the outlet pipeline to adjust the distance between the outlet pressure regulating valve 16 and the test screw pump 4 along the outlet slide rail 21. The outlet screw bracket 19 can adjust the height of the outlet pressure regulating valve 16 from the test oil tank 2 through the screw thread connection. In implementation, it is similar to the aforementioned inlet pipeline adjustment mechanism. The outlet slide rail 21 is mounted on the outlet mounting plate 23, and the outlet screw bracket 19 is mounted on the outlet slide rail 21, so that the height adjustment mechanism composed of the outlet slide rail 21 and the outlet mounting plate 23 can rotate together with the rotation of the slewing bearing 24. This allows the outlet pipeline of the present invention to meet the requirements of different oil outlet positions in the axial and circumferential directions. The implementation methods for height and distance are the same as those for the inlet pipeline adjustment mechanism, and will not be repeated here.

[0057] Furthermore, the outlet pipeline adjustment mechanism also includes a height adjustment bracket 22, which is mounted on the outlet mounting plate 23. Its top is connected to the side wall of the outlet adjustment joint 17 to support the lower half of the outlet pipeline and adjust the depth of the outlet elbow joint 18 into the test tank 2.

[0058] Furthermore, an outlet pressure gauge 15 is also provided on the side wall of the outlet transition joint 14, and is located behind the outlet pressure regulating valve 16, in order to detect the oil pressure of the outlet pipeline in real time. The outlet pressure regulating valve 16 is provided with a handwheel that the operator can rotate to adjust the flow rate of oil through the outlet pipeline.

[0059] Furthermore, such as Figure 4 As shown, the test oil tank 2 is also provided with 5-10mm protrusions around it to collect the test oil and prevent the test oil from flowing onto the test oil tank 2 and then flowing outward. A first drain hole 2.1 is provided on the test oil tank 2 so that the test oil remaining on the test oil tank 2 can flow back to the test oil tank 2 through the first drain hole 2.1.

[0060] Furthermore, such as Figure 5As shown, the outlet mounting plate 23 is also provided with a 5-10mm protrusion for collecting test oil and preventing the test oil from flowing onto the outlet mounting plate 23 and then flowing outward. At the same time, a second drain hole 23.1 is provided on the outlet mounting plate 23 so that the test oil remaining on the outlet mounting plate 23 can flow back to the test oil tank 2 through the second drain hole 23.1 and the first drain hole 2.1.

[0061] Furthermore, the inlet direct head 5 and outlet direct head 12 can be replaced according to different specifications of the test screw pump 4 to meet the testing requirements of these different specifications of products, thus expanding the application range of the testing device. This enables a single testing device to quickly meet the testing needs of various inlet and outlet direction combinations of different specifications of the test screw pump 4.

[0062] While specific embodiments of the invention have been described in detail by way of examples, those skilled in the art should understand that the examples are for illustrative purposes only and not intended to limit the scope of the invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.

Claims

1. A vertical testing device for an end-plate type screw pump, characterized in that, This includes testing the screw pump and the oil tank; The test oil tank is provided with a support base, the test screw pump is fixed vertically on the support base, and the top of the test screw pump is provided with a test motor to drive the test screw pump to run; The test oil tank is also equipped with an inlet pipe, which is connected to the oil inlet of the test screw pump to input the oil in the test oil tank into the test screw pump; the inlet pipe is equipped with an inlet pipe adjustment mechanism, which enables the inlet pipe to be connected to oil inlets at different positions; The test oil tank is also equipped with an outlet pipe, which is connected to the oil outlet of the test screw pump to output the oil in the test screw pump to the test oil tank, and to test the performance parameters of the test screw pump; the outlet pipe is also equipped with an outlet pipe adjustment mechanism, which enables the outlet pipe to be connected to the oil outlet at different positions. The outlet pipeline includes an outlet straight connector, an outlet transition connector, an outlet pressure regulating valve, an outlet elbow, and an outlet mounting plate. The test oil tank is provided with a first oil drain hole directly opposite the bottom of the test screw pump. One end of the outlet elbow is connected to the first oil drain hole, and the other end is connected to one end of the outlet pressure regulating valve through an outlet adjusting connector. The outlet adjusting connector is used to adjust the flow direction of the outlet elbow. One end of the outlet direct connector is connected to the oil outlet of the test screw pump, and the outlet transition connector connects the other end of the outlet direct connector to the other end of the outlet pressure regulating valve. The outlet transition connector is used to change the oil flow path between the outlet pressure regulating valve and the outlet direct connector. An outlet rotary joint is also provided between the outlet direct head and the outlet transition joint, and the three are connected by a connecting flange. The outlet rotary joint is used to change the connection surface between the outlet direct head and the oil outlet. The outlet pipeline also includes an outlet pipeline adjustment mechanism, which includes a slewing bearing; The slewing bearing is rotatably connected to the test oil tank, the outlet mounting plate is fixed to the slewing bearing, and the outlet mounting plate is provided with a second oil drain hole communicating with the first oil drain hole. The outlet elbow extends into the test oil tank through the second oil drain hole, so that the outlet pipeline can rotate 360° in the circumferential direction, and the outlet straight head can correspond to any oil outlet hole in the circumferential direction of the test screw pump. The outlet pipeline adjustment mechanism also includes an outlet mounting plate and an outlet screw support. The outlet mounting plate is located on one side of the outlet mounting plate, and the top of the outlet screw bracket is connected to the side wall of the outlet transition joint to support the lower half of the outlet pipeline. The outlet screw bracket can adjust the height of the outlet pressure regulating valve from the test oil tank through a screw thread connection.

2. The vertical testing device for end-plate type screw pumps according to claim 1, characterized in that, The inlet pipeline includes an inlet straight connector, an inlet elbow connector, and an inlet pressure regulating valve. The two ends of the inlet pressure regulating valve are connected to the inlet straight connector and the inlet elbow connector respectively via connecting flanges. The inlet straight connector is connected to the oil inlet of the test screw pump. The test oil tank has a connector adjustment hole, and the inlet elbow connector extends into the test oil tank through the connector adjustment hole.

3. The vertical testing device for end-plate type screw pumps according to claim 2, characterized in that, The inlet pipeline also includes an inlet pipeline adjustment mechanism, which includes an inlet slide rail and an inlet mounting plate; The connector adjustment hole has an oblong groove structure, and the inlet slide rail is arranged parallel to the test oil tank along the length direction of the connector adjustment hole; the inlet mounting plate is arranged on the inlet slide rail and can slide, and the inlet mounting plate is also provided with an inlet screw bracket, the top of the inlet screw bracket being connected to the inlet pressure regulating valve; The imported lead screw bracket can adjust the height of the imported pressure regulating valve from the test oil tank via a lead screw thread connection, and the imported mounting plate can adjust the distance between the imported pressure regulating valve and the test screw pump.

4. The vertical testing device for end-plate type screw pumps according to claim 3, characterized in that, The inlet head is also equipped with an inlet pressure gauge to monitor the oil pressure of the inlet pipeline in real time.

5. The vertical testing device for end-plate type screw pumps according to any one of claims 1-4, characterized in that, The outlet pipeline adjustment mechanism also includes a height adjustment bracket, which is mounted on the outlet mounting plate. Its top is connected to the side wall of the outlet adjustment joint to support the lower half of the outlet pipeline and adjust the depth of the outlet elbow into the test oil tank.

6. The vertical testing device for end-plate type screw pumps according to claim 5, characterized in that, An outlet pressure gauge is also provided on the side wall of the outlet transition joint to detect the oil pressure of the outlet pipeline in real time.

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