A horizontal test device for end-plate screw pumps

Abstract

The present invention discloses a horizontal testing device for an end-plate type screw pump, which includes a testing screw pump and a testing oil tank; an inlet pipeline is further provided on the testing oil tank, and the inlet pipeline is connected to the oil inlet of the testing screw pump; an inlet pipeline adjusting mechanism is further provided on the inlet pipeline, which can connect the inlet pipeline to the oil inlets at different positions. An outlet pipeline is further provided on the testing oil tank, and the outlet pipeline is connected to the oil outlet of the testing screw pump, and the performance parameters of the testing screw pump are detected thereby; an outlet pipeline adjusting mechanism is further provided on the outlet pipeline, which can connect the outlet pipeline to the oil outlets at different positions. The present invention can meet the testing requirements of end-plate type screw pumps of different specifications, so that through a set of testing devices, the testing work of various inlet and outlet direction combination modes of end-plate type screw pumps of different specifications can be quickly satisfied, the efficiency is improved, the cost is saved, and the high-efficiency output of the end-plate type screw pump is better satisfied.

Description

Technical Field

[0001] The present invention relates to the technical field of screw pump testing, and more specifically, to a horizontal testing device for an end - disk type screw pump. Background Art

[0002] On a conventional end - disk type screw pump, since the inlet and outlet directions can be rotated and fixed every 90° in the circumferential direction, there are four directions each for the upper, lower, left, and right directions at both the inlet and outlet of the end - disk type screw pump (the definitions of "upper, lower, left, and right" are observed from the driving end (motor) towards the screw pump). This results in 16 (= 4×4) combinations of inlet and outlet directions for the end - disk type screw pump. At the same time, there are two forms for the outlet of the end - disk type screw pump, namely the horizontal inlet and the vertical inlet. Thus, the end - disk type screw pump can ultimately form 32 (= 4×4×2) combinations of inlet and outlet directions, and these combinations are adjusted before leaving the factory according to user requirements and are actually used at the user site.

[0003] Although the end - disk type screw pump has flexible combinations of inlet and outlet directions, which can bring great convenience to users, in actual production, due to the large number of combinations of its inlet and outlet directions, it brings great inconvenience to the testing process. Due to the fixity of the test bench, the inlet and outlet pipes of the test bench are relatively fixed and cannot be easily adjusted. The relatively fixed test pipes conflict with the multiple combinations of inlet and outlet directions of the end - disk type screw pump, greatly increasing the testing time, reducing the testing efficiency, and thus prolonging the overall production time of this type of product. Especially when there are multiple inlet and outlet combinations for products in the same batch, this contradiction becomes more obvious and prominent.

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

[0005] The object of the present invention is to provide a horizontal testing device for an end - disk type screw pump to solve the problems in the above - mentioned background art.

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

[0007] A support seat is provided on the test oil tank, the test screw pump is horizontally fixed on the support seat, and a test motor for driving the test screw pump to operate is provided at the end of the test screw pump;

[0008] An inlet pipeline is also provided on the test fuel tank. The inlet pipeline is connected to the oil inlet of the test screw pump to input the oil in the test fuel tank into the test screw pump. An inlet pipeline adjustment mechanism is also provided on the inlet pipeline, which can connect the inlet pipeline to oil inlets at different positions.

[0009] An outlet pipeline is also provided on the test fuel tank. The outlet pipeline is connected to the oil outlet of the test screw pump to output the oil in the test screw pump to the test fuel tank, and the performance parameters of the test screw pump are tested thereby. An outlet pipeline adjustment mechanism is also provided on the outlet pipeline, which can connect the outlet pipeline to oil outlets at different positions.

[0010] Optionally, for the horizontal test device of the end plate type screw pump according to the present invention, the inlet pipeline includes an inlet straight joint, an inlet transition joint, an inlet elbow joint, and an inlet pressure regulating valve. Both ends of the inlet pressure regulating valve are connected to the inlet straight joint and the inlet elbow joint respectively through connecting flanges. The inlet elbow joint is connected to the oil inlet of the test screw pump. An inlet adjustment hole is provided on the test fuel tank, and the inlet straight joint passes through the inlet adjustment hole and extends into the test fuel tank.

[0011] Optionally, for the horizontal test device of the end plate type screw pump according to the present invention, the inlet pipeline further includes an inlet pipeline adjustment mechanism. The inlet pipeline adjustment mechanism includes an inlet horizontal slide rail, an inlet vertical slide rail, and a support mounting plate.

[0012] The inlet adjustment hole is in the shape of a waist-shaped groove. The inlet horizontal slide rail is arranged on the support seat along the width direction of the inlet adjustment hole, and the inlet vertical slide rail is arranged on the inlet horizontal slide rail along the length direction of the inlet adjustment hole.

[0013] The support mounting plate is arranged on the inlet vertical slide rail and can slide thereon. A lead screw support is further provided on the support mounting plate, and the top of the lead screw support is connected to the inlet transition joint.

[0014] The height of the inlet pressure regulating valve from the test fuel tank can be adjusted by the lead screw support through threaded connection with the lead screw. The inlet horizontal slide rail and the inlet vertical slide rail can make the pipe orifice of the inlet elbow joint correspond to the oil inlet.

[0015] Optionally, for the horizontal test device of the end plate type screw pump according to the present invention, an inlet rotary joint is further provided between the inlet elbow joint and the inlet transition joint, and the three are connected through connecting flanges. The inlet rotary joint is used to enable the inlet elbow joint to be connected to oil inlets at different circumferential positions of the test screw pump.

[0016] Optionally, in the horizontal test device for the end-plate type screw pump according to the present invention, an inlet pressure gauge is further provided on the inlet transition joint to detect the oil pressure in the inlet pipeline in real time.

[0017] Optionally, in the horizontal test device for the end-plate type screw pump according to the present invention, the outlet pipeline includes an outlet straight joint, an outlet pressure regulating valve, and an outlet elbow joint;

[0018] Both ends of the outlet pressure regulating valve are respectively connected to the outlet straight joint and the outlet elbow joint through connecting flanges. The outlet straight joint is connected to the oil outlet of the test screw pump. An outlet adjustment hole is provided on the test oil tank, and the outlet elbow joint passes through the outlet adjustment hole and extends into the test oil tank.

[0019] Optionally, in the horizontal test device for the end-plate type screw pump according to the present invention, the outlet pipeline further includes an outlet pipeline adjusting mechanism. The outlet pipeline adjusting mechanism includes an outlet horizontal slide rail, an outlet vertical slide rail, and an adjusting frame mounting plate;

[0020] The outlet adjustment hole is in the shape of a waist-shaped groove. The outlet vertical slide rail is arranged on the outlet horizontal slide rail along the length direction of the outlet adjustment hole;

[0021] The adjusting frame mounting plate is arranged on the outlet vertical slide rail and can slide thereon. A height adjusting frame is further provided on the adjusting frame mounting plate, and the top of the height adjusting frame is connected to the outlet pressure regulating valve;

[0022] The height of the outlet pressure regulating valve from the test oil tank can be adjusted by the height adjusting frame through screw thread connection. The outlet horizontal slide rail and the outlet vertical slide rail can make the pipe orifice of the outlet straight joint correspond to the oil outlet.

[0023] Optionally, in the horizontal test device for the end-plate type screw pump according to the present invention, an outlet rotary joint is further provided between the outlet straight joint and the outlet pressure regulating valve, and the three are connected through connecting flanges. The outlet rotary joint is used to change the connection surface between the outlet straight joint and the oil outlet.

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

[0025] Optionally, in the horizontal test device for the end-plate type screw pump according to the present invention, a 5-10 mm protrusion is provided around the test oil tank to prevent the oil from flowing onto the test oil tank and then flowing outwards. A first oil drain hole is further provided on the test oil tank to enable the oil remaining on the test oil tank to flow back into the test oil tank through the first oil drain hole;

[0026] A 5-10 mm protrusion is provided around the support base to prevent the test oil product from flowing onto the support base and then flowing outwards. A second oil drain hole is also provided on the support base so that the oil remaining on the support base can flow back into the test fuel tank through the first oil drain hole and the second oil drain hole.

[0027] In the present invention, by fixing the direction of the outlet of the end plate type screw pump during testing (it can be up, down, left, or right), the change in multiple outlet directions can be reduced. At the same time, by setting an outlet rotary joint at the outlet position of the end plate type screw pump, the outlet straight joint can rotate, enabling it to meet the changes in the two forms of the outlet of the end plate type screw pump, namely the horizontal outlet and the vertical outlet; by setting an inlet rotary joint at the inlet position of the end plate type screw pump, the inlet elbow joint can rotate 360°, enabling the inlet elbow joint to meet the changes in the four directions of up, down, left, and right at the inlet of the end plate type screw pump. In this way, the testing work for all combinations of the inlet and outlet directions of the end plate type screw pump can be quickly satisfied. In addition, by replacing the inlet elbow joint and the outlet straight joint, the testing requirements for end plate type screw pumps of different specifications can be met, expanding the application range of the testing device. In this way, it can be achieved that a set of testing device can quickly satisfy the testing work for various combinations of the inlet and outlet directions of end plate type screw pumps of different specifications, improving efficiency, saving costs, and better meeting the high-efficiency production of end plate type screw pumps.

[0028] Other features and advantages of the present invention will become clear through the following detailed description of the exemplary embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings incorporated in and constituting a part of this specification illustrate embodiments of the present invention and, together with the description, are used to explain the principles of the present invention.

[0030] Figure 1 It is a schematic diagram of the overall device of the horizontal testing device for the end plate type screw pump disclosed in the present invention when the screw pump has an upper inlet.

[0031] Figure 2 It is an enlarged schematic diagram of the horizontal testing device for the end plate type screw pump disclosed in the present invention when the screw pump has a horizontal outlet form and is installed in the testing device.

[0032] Figure 3 It is an enlarged schematic diagram of the horizontal testing device for the end plate type screw pump disclosed in the present invention when the screw pump has a vertical outlet form and is installed in the testing device.

[0033] Figure 4 It is a schematic diagram of the test fuel tank 3 in the horizontal testing device for the end plate type screw pump disclosed in the present invention.

[0034] Figure 5 Schematic diagram of the support base 5 in the horizontal test device of the end - disk type screw pump disclosed by the present invention;

[0035] Figure 6 Overall schematic diagram of the horizontal test device of the end - disk type screw pump disclosed by the present invention when the screw pump has a right - hand inlet;

[0036] Figure 7 Overall schematic diagram of the horizontal test device of the end - disk type screw pump disclosed by the present invention when the screw pump has a bottom - hand inlet;

[0037] Figure 8 Overall schematic diagram of the horizontal test device of the end - disk type screw pump disclosed by the present invention when the screw pump has a left - hand inlet.

[0038] Explanation of reference numerals: 1. Test motor; 2. Coupling; 3. Test oil tank; 3.1. First oil drain hole; 3.2. Inlet adjustment hole; 3.3. Outlet adjustment hole; 4. Test screw pump; 5. Support base; 5.1. Second oil drain hole; 5.2. Screw pump mounting plate; 6. Inlet elbow joint; 7. Inlet rotary joint; 8. Inlet transition joint; 9. Inlet pressure gauge; 10. Inlet pressure regulating valve; 11. Inlet straight joint; 12. Lead screw support; 13. Support mounting plate; 14. Inlet horizontal slide rail; 15. Inlet vertical slide rail; 16. Outlet straight joint; 17. Outlet pressure gauge; 18. Outlet rotary joint; 19. Outlet pressure regulating valve; 20. Outlet elbow joint; 21. Height adjustment frame; 22. Adjustment frame mounting plate; 23. Outlet horizontal slide rail; 24. Outlet vertical slide rail. Detailed implementation manners

[0039] Now, various exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present invention.

[0040] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way serves as a limitation on the present invention, its application or use.

[0041] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be regarded as part of the specification.

[0042] In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0043] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it will not be discussed further in subsequent figures.

[0044] As shown in Figures 1 to 8 a horizontal test device for an end-plate type screw pump includes a test screw pump 4 and a test oil tank 3.

[0045] A support seat 5 is provided on the test oil tank 3. The test screw pump 4 is horizontally fixed on the support seat 5. And a test motor 1 for driving the test screw pump 4 to operate is provided at the end of the test screw pump 4. The two are connected by a coupling 2 and rotate synchronously.

[0046] An inlet pipeline is also provided on the test oil tank 3. The inlet pipeline is connected to the inlet of the test screw pump 4 to input the oil in the test oil tank 3 into the test screw pump 4. An inlet pipeline adjustment mechanism is also provided on the inlet pipeline, which can connect the inlet pipeline to inlets at different positions.

[0047] An outlet pipeline is also provided on the test oil tank 3. The outlet pipeline is connected to the outlet of the test screw pump 4 to input the oil in the test screw pump 4 into the test oil tank 3 and thereby detect the performance parameters of the test screw pump 4. An outlet pipeline adjustment mechanism is also provided on the outlet pipeline, which can connect the outlet pipeline to outlets at different positions.

[0048] In this embodiment, the inlets and outlets of the test screw pump 4 are generally arranged on the side walls. The direction of the outlet of the fixed end-plate type screw pump is fixed during the test of the present invention (it can be up, down, left, or right. In this case, the right outlet is taken as the fixed direction for illustration) to reduce the change of multiple outlet directions. One end of the inlet pipeline extends into the test oil tank 3, and the other end is connected to the inlet of the test screw pump 4. One end of the outlet pipeline extends into the test oil tank 3, and the other end is connected to the outlet of the test screw pump 4. The test motor 1 is used to drive the test screw pump 4 to operate, and the performance parameters of the test screw pump 4 are detected by the transportation condition of the oil. In addition, as Figure 5 shown, the screw pump in the present invention is of a horizontal structure. The support seat 5 is integrally of a disc-shaped structure, and a screw pump mounting plate 5.2 is provided on the support seat 5 to fix and lay the test motor 1 and the test screw pump 4 flat on the support seat 5. The inlets and outlets are respectively connected to the inlet pipeline and the outlet pipeline. The inlet pipeline adjustment mechanism and the outlet pipeline adjustment mechanism respectively adjust the positions of the inlet pipeline and the outlet pipeline, so as to connect to different inlets and outlets on the test screw pump 4, ensuring that the test device disclosed in the present invention is applicable to the performance parameters of most test screw pumps 4.

[0049] Furthermore, the inlet pipeline includes an inlet union 11, an inlet adapter 8, an inlet elbow 6, and an inlet pressure regulating valve 10. The two ends of the inlet pressure regulating valve 10 are respectively connected to the inlet union 11 and the inlet elbow 6 through connecting flanges. The inlet elbow 6 is connected to the oil inlet of the test screw pump 4. An inlet adjustment hole 3.2 is provided on the test oil tank 3. The inlet union 11 passes through the inlet adjustment hole 3.2 and extends into the test oil tank 3. During implementation, since this embodiment is described with the right outlet as the fixed direction, the surface outlet pipeline corresponds to the oil outlet on the right side, and the inlet pipeline is arranged on the side opposite to the bottom of the test screw pump 4. Therefore, the inlet elbow 6 is generally a pipeline structure in a U shape, and the inlet union 11 is a straight pipe structure. The conveying path of the oil fluid is changed through the inlet elbow 6, so that the inlet pipeline can effectively connect the test oil tank 3 and the oil inlet of the test screw pump 4.

[0050] Still further, the inlet pipeline further includes an inlet pipeline adjusting mechanism. The inlet pipeline adjusting mechanism includes an inlet horizontal slide rail 14, an inlet vertical slide rail 15, and a bracket mounting plate 13. The inlet adjustment hole 3.2 is in a waist-shaped groove structure. The inlet horizontal slide rail 14 is arranged on the support base 5 along the width direction of the inlet adjustment hole 3.2, and the inlet vertical slide rail 15 is arranged on the inlet horizontal slide rail 14 along the length direction of the inlet adjustment hole 3.2. The bracket mounting plate 13 is arranged on the inlet vertical slide rail 15 and can slide thereon, and a lead screw bracket 12 is further provided on the bracket mounting plate 13. The top of the lead screw bracket 12 is connected to the inlet adapter 8.

[0051] During implementation, according to the length of the inlet elbow 6 and the different positions of the oil inlet on the test screw pump 4, the inlet pipeline needs to be adjusted. During installation, the position of the test screw pump 4 is adjusted to ensure that the orientation of its oil outlet is to the right. Since the positions of the oil inlets are different axially, the lead screw bracket 12 can adjust the height of the inlet pressure regulating valve 10 from the test oil tank 3 through screw thread connection, so as to ensure that the pipe orifice of the inlet elbow 6 can correspond to the oil inlet. The inlet horizontal slide rail 14 can move along the inlet vertical slide rail 15, and the bracket mounting plate 13 can move along the inlet horizontal slide rail 14. The length and width of the joint adjustment hole both need to be greater than the pipe diameter of the inlet union 11, so as to ensure that the inlet union 11 can move together with the bracket mounting plate 13, thereby adjusting the distance between the inlet pressure regulating valve 10 and the test screw pump 4, and enabling the pipe orifice of the inlet elbow 6 to be stably connected to the oil inlet.

[0052] Furthermore, an inlet swivel joint 7 is provided between the inlet elbow joint 6 and the inlet transition joint 8, and the three are connected by a connecting flange. The inlet swivel joint 7 is used to enable the inlet elbow joint 6 to be connected to the oil outlets at different circumferential positions of the test screw pump 4. The above adjustments are made for the oil inlets at different axial positions on the test screw pump 4. The inlet swivel joint 7 is for the adjustments for the oil inlets at different circumferential positions on the test screw pump 4. The inlet elbow joint 6 can be rotated 360° through the inlet swivel joint 7, so that it can meet the changes in the upper, lower, left, and right four directions of the inlet of the end-plate type screw pump.

[0053] As Figure 1 shown, when the end-plate type screw pump has an upper-side inlet, only by rotating the inlet swivel joint 7 and rotating the inlet elbow joint 6 to the inlet direction of the end-plate type screw pump and connecting it thereto, the test of this combination form of the inlet and outlet directions of the end-plate type screw pump can be completed; as Figure 6 shown, when the end-plate type screw pump has a right-side inlet, only by rotating the inlet swivel joint 7 and rotating the inlet elbow joint 6 to the inlet direction of the end-plate type screw pump and connecting it thereto, the test of this combination form of the inlet and outlet directions of the end-plate type screw pump can be completed; as Figure 7 shown, when the end-plate type screw pump has a lower-side inlet, only by rotating the inlet swivel joint 7 and rotating the inlet elbow joint 6 to the inlet direction of the end-plate type screw pump and connecting it thereto, the test of this combination form of the inlet and outlet directions of the end-plate type screw pump can be completed; as Figure 8 shown, when the end-plate type screw pump has a left-side inlet, only by rotating the inlet swivel joint 7 and rotating the inlet elbow joint 6 to the inlet direction of the end-plate type screw pump and connecting it thereto, the test of this combination form of the inlet and outlet directions of the end-plate type screw pump can be completed.

[0054] Furthermore, an inlet pressure gauge 9 is provided on the inlet transition joint 8 and is located behind the inlet pressure regulating valve 10 to detect the oil pressure in the inlet pipeline in real time. An operator-rotated handwheel is provided on the inlet pressure regulating valve 10 to facilitate the adjustment of the oil flow through the inlet pipeline.

[0055] Furthermore, the outlet pipeline includes an outlet union 16, an outlet pressure regulating valve 19, and an outlet elbow 20. The two ends of the outlet pressure regulating valve 19 are respectively connected to the outlet union 16 and the outlet elbow 20 through connecting flanges. The outlet union 16 is connected to the oil outlet of the test screw pump 4. An outlet adjustment hole 3.3 is provided on the test oil tank 3. The outlet elbow 20 passes through the outlet adjustment hole 3.3 and extends into the test oil tank 3. During implementation, since the position of the oil outlet of the present invention is fixed to face the right side, the outlet elbow 20 has an L-shaped pipe structure, and the outlet union 16 is a straight pipe mechanism. By changing the oil delivery path through the outlet elbow 20, the inlet bend can effectively connect the test oil tank 3 and the oil outlet of the test screw pump 4.

[0056] Still further, the outlet pipeline further includes an outlet pipeline adjusting mechanism. The outlet pipeline adjusting mechanism includes an outlet horizontal slide rail 23, an outlet vertical slide rail 24, and an adjusting frame mounting plate 22. The outlet adjustment hole 3.3 has a waist-shaped groove structure. The outlet vertical slide rail 24 is arranged on the outlet horizontal slide rail 23 along the length direction of the outlet adjustment hole 3.3. The adjusting frame mounting plate 22 is arranged on the outlet vertical slide rail 24 and can slide thereon. A height adjusting frame 21 is further provided on the adjusting frame mounting plate 22. The top of the height adjusting frame 21 is connected to the outlet pressure regulating valve 19.

[0057] During implementation, according to the length of the outlet elbow 20 and the position of the oil outlet on the test screw pump 4, the outlet pipeline needs to be adjusted. During installation, adjust the position of the test screw pump 4 to ensure that the orientation of its oil outlet is to the right. The height adjusting frame 21 has a cross-shaped telescopic structure similar to scissors, and it can adjust the height of the outlet pressure regulating valve 19 from the test oil tank 3, so as to ensure that the pipe orifice of the outlet union 16 can correspond to the inlet port. The outlet horizontal slide rail 23 can move along the outlet vertical slide rail 24, and the adjusting frame mounting plate 22 can move along the outlet horizontal slide rail 23. The length and width of the joint adjustment hole need to be greater than the pipe diameter of the outlet union 16, so as to ensure that the outlet union 16 can move together with the adjusting frame mounting plate 22, thereby adjusting the distance between the outlet pressure regulating valve 19 and the test screw pump 4, and enabling the pipe orifice of the outlet elbow 20 to be stably connected to the inlet port.

[0058] Still further, an outlet rotary joint 18 is provided between the outlet union 16 and the outlet pressure regulating valve 19, and the three are connected through connecting flanges. The outlet rotary joint 18 is used to change the connection surface between the outlet union 16 and the oil outlet. As Figure 2 and Figure 3 shown. Due to the existence of the outlet rotary joint 18, the outlet union 16 can be rotated to meet the changes in the forms of the lateral outlet and the longitudinal outlet at the outlet of the test screw pump 4 (the outlet rotary joint 18 can be rotated by 90°).

[0059] Furthermore, an outlet pressure gauge 17 is also provided on the side wall of the outlet direct head 16 to detect the oil pressure in the outlet pipeline in real time, and it is located behind the outlet pressure regulating valve 19 to detect the oil pressure in the outlet pipeline in real time. An operating handwheel for the operator to rotate is provided on the outlet pressure regulating valve 19 to facilitate the adjustment of the flow rate of the oil through the outlet pipeline.

[0060] Further, for another example Figure 4 As shown, there are 5 - 10 mm protrusions around the test oil tank 3 to prevent the oil from flowing onto the test oil tank 3 and then flowing outwards. Also, a first oil drain hole 3.1 is provided on the test oil tank 3 to enable the oil remaining on the test oil tank 3 to flow back into the test oil tank 3 through the first oil drain hole 3.1; for another example Figure 5 As shown, there are 5 - 10 mm protrusions around the support base 5 to prevent the test oil product from flowing onto the support base 5 and then flowing outwards. Also, a second oil drain hole 5.1 is provided on the support base 5 to enable the oil remaining on the support base 5 to flow back into the test oil tank 3 through the first oil drain hole 3.1 and the second oil drain hole 5.1.

[0061] Although some specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present invention. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A horizontal test device for an end-plate type screw pump, characterized in that, It includes a test screw pump and a test oil tank; A support seat is provided on the test oil tank. The test screw pump is horizontally fixed on the support seat, and a test motor for driving the test screw pump to operate is provided at the end of the test screw pump; An inlet pipeline is also provided on the test oil tank. The inlet pipeline 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. An inlet pipeline adjustment mechanism is also provided on the inlet pipeline, which can connect the inlet pipeline to oil inlets at different positions; An outlet pipeline is also provided on the test oil tank. The outlet pipeline 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 the performance parameters of the test screw pump are tested thereby. An outlet pipeline adjustment mechanism is also provided on the outlet pipeline, which can connect the outlet pipeline to oil outlets at different positions; The inlet pipeline includes an inlet straight joint, an inlet transition joint, an inlet elbow joint, and an inlet pressure regulating valve. The two ends of the inlet pressure regulating valve are respectively connected to the inlet straight joint and the inlet elbow joint through connecting flanges. The inlet elbow joint is connected to the oil inlet of the test screw pump. An inlet adjustment hole is opened on the test oil tank, and the inlet straight joint passes through the inlet adjustment hole and extends into the test oil tank; The inlet pipeline also includes an inlet pipeline adjustment mechanism. The inlet pipeline adjustment mechanism includes an inlet horizontal slide rail, an inlet vertical slide rail, and a bracket mounting plate; The inlet adjustment hole is in the shape of a waist-shaped groove. The inlet horizontal slide rail is arranged on the support seat along the width direction of the inlet adjustment hole, and the inlet vertical slide rail is arranged on the inlet horizontal slide rail along the length direction of the inlet adjustment hole; The bracket mounting plate is arranged on the inlet vertical slide rail and can slide thereon. A lead screw bracket is also provided on the bracket mounting plate, and the top of the lead screw bracket is connected to the inlet transition joint; The lead screw bracket can adjust the height of the inlet pressure regulating valve from the test oil tank through screw thread connection. The inlet horizontal slide rail and the inlet vertical slide rail can make the pipe orifice of the inlet elbow joint correspond to the oil inlet; A 5 - 10 mm protrusion is provided around the test oil tank to prevent the oil from flowing onto the test oil tank and then flowing outwards. A first oil drain hole is also provided on the test oil tank to enable the oil remaining on the test oil tank to flow back into the test oil tank through the first oil drain hole; A 5 - 10 mm protrusion is provided around the support seat to prevent the test oil product from flowing onto the support seat and then flowing outwards. A second oil drain hole is also provided on the support seat to enable the oil remaining on the support seat to flow back into the test oil tank through the first oil drain hole and the second oil drain hole; 2. The horizontal testing device for end-plate screw pumps according to claim 1, characterized in that, An inlet rotary joint is also provided between the inlet elbow joint and the inlet transition joint, and the three are connected through connecting flanges. The inlet rotary joint is used to enable the inlet elbow joint to be connected to oil inlets at different circumferential positions of the test screw pump.

3. The horizontal test device for the end-plate type screw pump according to claim 2, characterized in that, An inlet pressure gauge is also provided on the inlet transition joint to detect the oil pressure of the inlet pipeline in real time.

4. The horizontal test device for the end-plate type screw pump according to any one of claims 1-3, characterized in that, The outlet pipeline includes an outlet straight joint, an outlet pressure regulating valve, and an outlet elbow joint; Both ends of the outlet pressure regulating valve are respectively connected to the outlet straight joint and the outlet elbow joint through connecting flanges. The outlet straight joint is connected to the oil outlet of the test screw pump. An outlet adjustment hole is provided on the test oil tank, and the outlet elbow joint passes through the outlet adjustment hole and extends into the test oil tank.

5. The horizontal test device for the end-plate type screw pump according to claim 4, wherein, The outlet pipeline further includes an outlet pipeline adjustment mechanism, and the outlet pipeline adjustment mechanism includes an outlet horizontal slide rail, an outlet vertical slide rail, and an adjustment frame mounting plate; The outlet adjustment hole is in the shape of a waist-shaped groove, and the outlet vertical slide rail is arranged on the outlet horizontal slide rail along the length direction of the outlet adjustment hole; The adjustment frame mounting plate is arranged on the outlet vertical slide rail and can slide thereon. A height adjustment frame is further provided on the adjustment frame mounting plate, and the top of the height adjustment frame is connected to the outlet pressure regulating valve; The height adjustment frame can adjust the height of the outlet pressure regulating valve from the test oil tank through screw thread connection. The outlet horizontal slide rail and the outlet vertical slide rail can make the pipe orifice of the outlet straight joint correspond to the oil outlet.

6. The horizontal test device for the end-plate type screw pump according to claim 5, wherein, An outlet swivel joint is further provided between the outlet straight joint and the outlet pressure regulating valve, and the three are connected through connecting flanges. The outlet swivel joint is used to change the connection surface between the outlet straight joint and the oil outlet.

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

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