Device for testing service life of diaphragm in fuel pressure regulating valve

Abstract

The utility model discloses a service life test device for a diaphragm in a fuel pressure regulating valve, which comprises a test board, a bearing column is arranged on the surface of the test board, a placing groove is arranged in the upper side surface of the bearing column, the diaphragm is placed in the placing groove, a pressurizing groove is arranged in the bottom surface of the placing groove, and the diaphragm is placed in the pressurizing groove. The pressurizing mechanism is used for controlling the air pressure in the pressurizing tank; the diaphragm fatigue testing device further comprises a cover plate, a groove is formed in the lower side face of the cover plate, the diameter of the groove is smaller than that of the containing groove, the diaphragm fatigue testing device is used for conducting fatigue testing on a diaphragm, the diaphragm fatigue testing device can conduct synchronous testing on a plurality of diaphragms at the same time, and the testing efficiency is high; according to the utility model, one side of the diaphragm can be infiltrated with fuel oil during testing so as to simulate a real use scene after the diaphragm is arranged in a fuel oil pressure regulator, the degree of distortion of testing is low, and the fuel oil pressure regulator is provided with an oil storage plate so as to prevent the fuel oil from flowing out and polluting a test board after the testing is completed.

Description

TECHNICAL FIELD

[0001] The utility model relates to fuel pressure regulating valve technical field especially relates to a diaphragm life test equipment in fuel pressure regulating valve. BACKGROUND

[0002] Diaphragm type fuel pressure regulating valve is a kind of device for controlling fuel system pressure, it is mainly composed of diaphragm, valve seat, spring and shell etc., wherein diaphragm is a key elastic element, fuel pressure acts on one side of diaphragm, and diaphragm will produce deformation and make fuel flow.

[0003] However, diaphragm bears the action of fuel pressure for a long time, with the increase of use time and the increase of pressure cycle times, diaphragm material will gradually fatigue, diaphragm can appear tiny crack under frequent pressure change, finally lead to rupture, therefore, different batches of diaphragm need to carry out fatigue test work before carrying out fuel pressure regulator assembly work, there are few fatigue test equipment for diaphragm on the market at present, therefore, need to develop. UTILITY MODEL CONTENTS

[0004] In view of the deficiencies of prior art, the utility model provides a diaphragm life test equipment in fuel pressure regulating valve to solve the problems mentioned in the above background art.

[0005] The utility model provides the following technical scheme: a diaphragm life test equipment in fuel pressure regulating valve, including test table, the table top of test table is provided with bearing column, the upper side of bearing column is provided with placing groove, the diaphragm is placed in placing groove, and the bottom of placing groove is provided with pressurizing groove, and it also includes pressurizing mechanism for controlling the air pressure in pressurizing groove;

[0006] It also includes cover plate, the lower side of cover plate is equipped with recess, the diameter of recess is less than the diameter of placing groove, and the curved surface of recess is equipped with air hole, and it also includes locking mechanism for controlling the up-down position of cover plate.

[0007] Preferably, it also includes ejection mechanism, the ejection mechanism includes the sliding block that is connected on the curved surface of pressurizing groove up and down, the upper side of sliding block is provided with ejector rod, and the end of sliding block and lower side are inverted bevel to form No.

[0008] The sliding rod that extends to the outside of bearing column is slidably connected in pressurizing groove, the end of sliding rod in pressurizing groove is equipped with the triangular plate that can cooperate with No.

[0009] Preferably, the plurality of bearing columns and the plurality of cover plates are provided and the number is consistent, the pressurizing mechanism comprises a control cavity arranged in the test table, a first lifting plate is slidably connected in the control cavity, and a first piston rod extending into each of the bearing columns is arranged on the upper side of the first lifting plate;

[0010] A motor is arranged in the test table, and an output shaft in the motor is connected to the lower side of the first lifting plate through a crank slider mechanism, so that the first lifting plate can reciprocatingly ascend and descend.

[0011] Preferably, an air pressure sensor is further arranged on the bearing column, a probe in the air pressure sensor extends into the pressurizing groove, and is located on the upper side of the piston stroke in the first piston rod.

[0012] Preferably, the locking mechanism comprises a fixed plate fixed on the upper side of the test table through a support, a cylinder is arranged on the fixed plate, a second lifting plate is arranged on the lower end of a piston rod in the cylinder, and each of the cover plates is fixed on the lower side of the second lifting plate.

[0013] Preferably, an oil storage tank is arranged on the fixed plate, a hose is connected to an oil outlet of the oil storage tank through a valve, and the hose is connected to each of the cover plates.

[0014] Preferably, an oil storage plate is arranged on the outer curved surface of the bearing column.

[0015] The diaphragm life test equipment in the fuel pressure regulating valve has the following beneficial effects:

[0016] The diaphragm fatigue test can be performed, and the diaphragm can be simultaneously tested synchronously, and the test efficiency is high.

[0017] The diaphragm can be immersed in fuel on one side during the test, so that the real use scene after the diaphragm is loaded into the fuel pressure regulator is simulated, the distortion degree of the test is low, and the oil storage plate is arranged, so that the fuel can be prevented from flowing out and polluting the test table after the test is completed. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic view of the appearance of the utility model;

[0019] Figure 2 is a schematic view of the structure in the utility model;

[0020] Figure 3 is Figure 2 the enlarged schematic view of the circled part in the figure.

[0021] In the figure:

[0022] 11, test bench; 12, bearing column; 13, placing groove; 14, pressurizing groove; 21, cover plate; 22, groove; 31, sliding block; 32, ejector rod; 33, sliding rod; 34, pressing plate; 41, control cavity; 42, first lifting plate; 43, first piston rod; 44, motor; 51, air pressure sensor; 61, fixed plate; 62, air cylinder; 63, second lifting plate; 71, oil storage tank; 72, oil storage plate. DETAILED DESCRIPTION

[0023] The embodiments of the present application are described in detail below, examples of which are shown in the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0026] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication or interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0027] Reference Figures 1-3The utility model provides a kind of diaphragm life test equipment in fuel pressure regulating valve according to the embodiment of the utility model, including test table 11, the mesa of test table 11 is provided with bearing column 12, the upper side of bearing column 12 is provided with placing groove 13, placing groove 13 is used to place and position diaphragm, and the bottom surface of placing groove 13 is provided with pressurizing groove 14, further including pressurizing mechanism for controlling the gas pressure in pressurizing groove 14.

[0028] Further including cover plate 21, the lower side of cover plate 21 is provided with recess 22, the diameter of recess 22 is less than the diameter of placing groove 13, so that cover plate 21 can be pressed when being attached to bearing column 12 diaphragm located in placing groove 13, and the curved surface of recess 22 is provided with air hole, further including locking mechanism for controlling the up-down position of cover plate 21.

[0029] When diaphragm needs to be tested, staff places diaphragm in placing groove 13, and makes cover plate 21 drop through locking mechanism, until cover plate 21 is pressed on diaphragm, at this time diaphragm is positioned, then pressurizing mechanism reciprocating pressurizes in pressurizing groove 14, to carry out fatigue test to diaphragm.

[0030] In order to improve test efficiency, so that multiple diaphragms can be tested simultaneously, bearing column 12 and cover plate 21 are provided with multiple and consistent number, in the embodiment, pressurizing mechanism includes control cavity 41 provided in test table 11, one lifting plate 42 is slidably connected in control cavity 41, the upper side of one lifting plate 42 is provided with one piston rod 43 extending into each bearing column 12;

[0031] Motor 44 is mounted in test table 11, and the output shaft in motor 44 is connected to the lower side of one lifting plate 42 through crank slider mechanism, so that one lifting plate 42 can reciprocatingly lift, specifically, the crank slider mechanism includes disc provided at the end of output shaft, convex column is mounted on the disc, the convex column is not coaxial with the disc, and connecting rod is rotatably connected to the outer side of convex column, the upper end of connecting rod is hinged to the lower side of one lifting plate 42, so that motor 44 will drive disc when electrified, so that one lifting plate 42 and one piston rod 43 thereon reciprocatingly lift, the gas pressure in pressurizing groove 14 will change when one piston rod 43 lifts, so as to push and pull the locked diaphragm, and carry out diaphragm test work.

[0032] In addition, in order to monitor whether the diaphragm is broken in real time during the test, the bearing column 12 is also provided with an air pressure sensor 51, the probe in the air pressure sensor 51 extends into the pressurizing groove 14 and is located at the upper side of the piston stroke in the first piston rod 43.

[0033] The locking mechanism includes a fixed plate 61 fixed on the upper side of the test table 11 by a support, the fixed plate 61 is provided with a cylinder 62, the lower end of the piston rod in the cylinder 62 is provided with a second lifting plate 63, each cover plate 21 is fixed on the lower side of the second lifting plate 63, that is, the staff can control the lifting of the second lifting plate 63 and the cover plate 21 by controlling the cylinder 62, and when the cover plate 21 moves downward, it will be attached to the bearing column 12 and press the diaphragm.

[0034] In the second embodiment of the diaphragm life test equipment in the fuel pressure regulating valve, in order to further simulate the real use scene of the diaphragm, the fixed plate 61 is provided with an oil storage tank 71, the oil storage tank 71 stores fuel, the oil outlet of the oil storage tank 71 is connected with a hose through a valve, the hose is connected to each cover plate 21, after the cover plate 21 is pressed on the diaphragm, the electronically controlled valve can be opened for a certain time to make the oil in the oil storage tank 71 flow into the groove 22 and soak one side of the diaphragm, so as to simulate the real use scene and improve the test accuracy.

[0035] In addition, in this embodiment, in order to avoid the oil flowing out to pollute the table surface of the test table 11 after the cover plate 21 rises, the outer curved surface of the bearing column 12 is provided with an oil storage plate 72.

[0036] In addition, in order to facilitate the staff to take out the diaphragm which has been tested, a ejection mechanism is further included, the ejection mechanism includes a sliding block 31 which is connected to the curved surface of the pressurizing groove 14 in a sliding manner, the upper side of the sliding block 31 is provided with a ejector rod 32, the end of the sliding block 31 and the lower side are inversely inclined to form an inclined surface;

[0037] The pressurizing groove 14 is slidably connected with a sliding rod 33 which extends out of the bearing column 12, the end of the sliding rod 33 in the pressurizing groove 14 is provided with a triangular plate which can match the inclined surface, in addition, the triangular plate can also play a limiting role, the end of the sliding rod 33 outside the bearing column 12 is provided with a pressing plate 34, the pressing plate 34 and the bearing column 12 are further connected through a spring.

[0038] After the test is completed, the staff can press the pressing plate 34 and make the slide rod 33 be pushed inward, at this time the triangular plate can drive the slider 31 and the top rod 32 to move upward through the inclined surface, when the top rod 32 moves upward, the diaphragm in the placing groove 13 is pushed out, so as to be picked up by the staff.

[0039] Specific test process:

[0040] Firstly, the staff places the diaphragm in the placing groove 13, then controls the air cylinder 62 to move downward and makes the cover plate 21 press on the bearing column 12, at this time the diaphragm is clamped.

[0041] Then the valve is opened for a period of time to make the oil flow into the recess 22 and wet the diaphragm.

[0042] After that, the motor 44 is energized and makes the first piston rod 43 reciprocate, in this process, the air pressure on both sides of the diaphragm changes, so that the diaphragm deforms repeatedly, to simulate the deformation and reset of the diaphragm in the normal use process of the fuel pressure regulator, if the diaphragm is broken during the test, it will be captured by the air pressure sensor 51, in this embodiment, the electrical signal output by the air pressure sensor 51 is displayed on the display screen in front of the test bench 11.

[0043] When the test is completed, the second lifting plate 63 rises, at this time the oil in the recess 22 enters the oil storage plate 72, and then the staff wipes off the oil on the surface of the diaphragm and presses the pressing plate 34, at this time the top rod 32 rises and lifts the diaphragm, so as to take out the tested diaphragm by the staff.

[0044] The above is only a specific embodiment of the present application, but the technical features of the present application are not limited to this, any person skilled in the art in the field of the present application, the changes or modifications made by them are covered in the patent range of the present application.

Claims

1. A diaphragm life testing apparatus within a fuel pressure regulator valve, comprising a test bench (11), characterized in that: The test platform (11) is provided with a bearing column (12), the upper side of the bearing column (12) is provided with a placing groove (13), the placing groove (13) is provided with a diaphragm, the bottom of the placing groove (13) is provided with a pressurizing groove (14), and the test platform (11) is further provided with a pressurizing mechanism for controlling the air pressure in the pressurizing groove (14). The lower side of the cover plate (21) is provided with a groove (22), the diameter of the groove (22) is smaller than that of the placing groove (13), the curved surface of the groove (22) is provided with a gas permeable hole, and the test platform (11) is further provided with a locking mechanism for controlling the up-down position of the cover plate (21).

2. A diaphragm life test apparatus in a fuel pressure regulator valve according to claim 1, characterized in that: The test platform (11) is further provided with an ejection mechanism, the ejection mechanism comprises a sliding block (31) slidingly connected to the curved surface of the pressurizing groove (14), the upper side of the sliding block (31) is provided with an ejector rod (32), and the end of the sliding block (31) and the lower side are inversely inclined to form a first inclined surface. The pressurizing groove (14) is slidingly connected with a slide rod (33) extending out of the bearing column (12), the end of the slide rod (33) in the pressurizing groove (14) is provided with a triangular plate matched with the first inclined surface, the end of the slide rod (33) out of the bearing column (12) is provided with a pressing plate (34), and the pressing plate (34) and the bearing column (12) are connected by a spring.

3. A diaphragm life test apparatus in a fuel pressure regulator valve as defined in claim 1, wherein: The bearing column (12) and the cover plate (21) are provided with a plurality of and consistent number, the pressurizing mechanism comprises a control cavity (41) arranged in the test platform (11), a first lifting plate (42) is slidingly connected in the control cavity (41), and a first piston rod (43) extending into each bearing column (12) is arranged on the upper side of the first lifting plate (42). The test platform (11) is provided with a motor (44), and the output shaft in the motor (44) is connected to the lower side of the first lifting plate (42) through a crank slider mechanism, so that the first lifting plate (42) can reciprocatingly ascend and descend.

4. A diaphragm life testing apparatus in a fuel pressure regulator valve according to claim 3, characterized in that: The bearing column (12) is further provided with an air pressure sensor (51), the probe in the air pressure sensor (51) extends into the pressurizing groove (14), and is located on the upper side of the piston stroke in the first piston rod (43).

5. A diaphragm life testing apparatus in a fuel pressure regulator valve according to claim 3, characterized in that: The locking mechanism comprises a fixed plate (61) fixed on the upper side of the test platform (11) through a support, the fixed plate (61) is provided with an air cylinder (62), the lower end of the piston rod in the air cylinder (62) is provided with a second lifting plate (63), and each cover plate (21) is fixed on the lower side of the second lifting plate (63).

6. A diaphragm life testing apparatus in a fuel pressure regulator valve according to claim 5, characterized in that: The fixed plate (61) is provided with an oil storage tank (71), the oil outlet of the oil storage tank (71) is connected with a hose through a valve, and the hose is connected to each cover plate (21).

7. A diaphragm life testing apparatus in a fuel pressure regulator valve according to claim 6, characterized in that: The outer curved surface of the bearing column (12) is provided with an oil storage plate (72).

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