A test machine and test method for opening pressure and flow of a spray hook assembly

Abstract

The application discloses a kind of test machine and test method of spray hook assembly opening pressure, flow, related to pressure flow detection technical field, including oil tank, hydraulic pump, speed regulating valve, pressure sensor, first two-position three-way electromagnetic reversing valve, first overflow valve, check valve, pressure relay, measured spray hook, second two-position three-way electromagnetic reversing valve, first flowmeter, second flowmeter and second overflow valve, the input end of the hydraulic pump extends to the oil tank in pipeline, the output end of the hydraulic pump is sealed with the input end of the speed regulating valve by pipeline, the output end of the speed regulating valve is sealed with the input end of the first two-position three-way electromagnetic reversing valve by pipeline;Beneficial effect lies in: by a set of test machine after detecting whether spray hook is qualified can also directly test the flow of specific pressure under spray hook, reduce equipment investment cost while also improve test efficiency, satisfy use demand.

Description

Technical Field

[0001] This invention relates to the field of pressure and flow detection technology, and in particular to a testing machine and method for testing the opening pressure and flow of a spray hook assembly. Background Technology

[0002] The opening pressure values ​​of the steel balls in the spray hook assembly vary, ranging from approximately 1.5 to 2 bar. The one-way valve components have errors in machining accuracy, and their opening pressures have upper and lower limit deviations, typically ±10%.

[0003] Currently, there are two main types of equipment on the market for testing the opening pressure of the steel ball in the spray hook assembly: one is a fixed-displacement pump with a fixed-speed motor for loading, and a proportional valve for pressure regulation in the pressure oil circuit; the other is a fixed-displacement pump with a variable-speed motor, which changes the pressure by changing the speed of the variable-speed motor. However, both of these types of equipment are expensive and have low testing efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a testing machine and method for testing the opening pressure and flow rate of a spray hook assembly in order to solve the above-mentioned problems. After detecting whether the spray hook is qualified, it can also test the flow rate through the spray hook under a specific pressure, thereby reducing costs and improving testing efficiency.

[0005] The present invention achieves the above objectives through the following technical solutions:

[0006] A testing machine for the opening pressure and flow rate of a spray hook assembly includes an oil tank, a hydraulic pump, a speed control valve, a pressure sensor, a first two-position three-way solenoid directional valve, a first relief valve, a check valve, a pressure relay, a spray hook under test, a second two-position three-way solenoid directional valve, a first flow meter, a second flow meter, and a second relief valve. The input end of the hydraulic pump extends into the oil tank via a pipe. The output end of the hydraulic pump is sealed to the input end of the speed control valve via a pipe. The output end of the speed control valve is sealed to the input end of the first two-position three-way solenoid directional valve via a pipe. One output end of the first two-position three-way solenoid directional valve is sealed to the input end of the check valve via a pipe. The other output end of the first two-position three-way solenoid directional valve and the output end of the check valve are both sealed to the two ports of a three-way pipe via pipes. The third port of the three-way pipe is sealed to the input end of the spray hook under test via a pipe. The output end of the spray hook under test is... The pipeline is sealed to the input end of the second two-position three-way solenoid directional valve. The two input ends of the second two-position three-way solenoid directional valve are respectively sealed to the input ends of the first flow meter and the second flow meter through pipelines. The output ends of the first flow meter and the second flow meter are respectively extended into the oil tank through pipelines. The pipeline between the hydraulic pump and the speed control valve is sealed to the input end of the second relief valve. The output end of the second relief valve is extended into the oil tank through a pipeline. The pipeline between the first two-position three-way solenoid directional valve and the check valve is sealed to the input end of the first relief valve. The output end of the first relief valve is extended into the oil tank through a pipeline. The pipeline between the three-way pipe and the measured spray hook is sealed to the input end of the pressure relay. The first two-position three-way solenoid directional valve normally connects to the pipeline where the check valve is located, and the second two-position three-way solenoid directional valve normally connects to the pipeline where the second flow meter is located.

[0007] Preferably, a filter is installed on the pipeline between the hydraulic pump and the oil tank.

[0008] Preferably, the hydraulic pump is driven by the motor.

[0009] A method for testing the opening pressure and flow rate of a spray hook assembly, using the aforementioned tester for the opening pressure and flow rate of a spray hook assembly, specifically includes a method for testing the opening pressure of the spray hook and a method for testing the flow rate of the spray hook.

[0010] Preferably, the test method for the opening pressure of the spray hook is as follows:

[0011] ① Before the test, adjust the pressure relay to the minimum opening pressure of the spray hook under test, and adjust the first overflow valve to the maximum opening pressure of the spray hook under test.

[0012] ② Start the hydraulic pump to draw oil from the oil tank. The oil in the oil tank passes through the filter, hydraulic pump, speed controller, first and second two-position three-way solenoid directional valve, and check valve in sequence to reach the input end of the spray hook to be tested.

[0013] ③ When the test pressure is lower than the minimum pressure, the steel ball of the spray hook assembly opens, and the spray hook under test does not meet the requirements. At this time, the first flow meter will not show a reading, but the second flow meter will show a reading.

[0014] If the steel ball of the spray hook assembly still does not open when the test pressure is higher than the maximum pressure, the spray hook under test does not meet the requirements. At this time, the first overflow valve opens, the oil flows back to the oil tank, the first flow meter has no reading, and the second flow meter has no reading.

[0015] When the test pressure is between the minimum and maximum pressure, the steel ball of the spray hook assembly opens, indicating that the spray hook under test meets the requirements. At this time, the pressure relay is triggered, the second two-position three-way solenoid valve is energized, the first flow meter shows a reading, and the second flow meter does not show a reading.

[0016] Preferably, the method for testing the flow rate of the spray hook is as follows:

[0017] ① The tested spray hook meets the requirements. The second overflow valve is used as a safety valve. The pressure sensor displays the system pressure in real time.

[0018] ② When the first and second two-position three-way solenoid directional valves are energized, the system pressure is adjusted to a specific pressure by adjusting the speed control valve. The reading of the first flow meter is the flow rate through the measured spray hook under the specific pressure.

[0019] ③ After the test is completed, the first and second position three-way solenoid valves are de-energized, and the testing machine enters the next test cycle;

[0020] ④ The worker replaces the spray hook being tested and proceeds with the next test.

[0021] Compared with the prior art, the beneficial effects of the present invention are as follows: after testing whether the spray hook is qualified, a set of testing machines can directly test the flow rate through the spray hook under a specific pressure, which reduces the equipment investment cost and improves the testing efficiency, thus meeting the usage requirements. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the structure of a test machine for the opening pressure and flow rate of a spray hook assembly as described in this invention.

[0024] The annotations in the attached figures are explained as follows:

[0025] 1. Oil tank; 2. Filter; 3. Motor; 4. Hydraulic pump; 5. Speed ​​control valve; 6. Pressure sensor; 7. First two-position three-way solenoid directional valve; 8. First relief valve; 9. Check valve; 10. Pressure relay; 11. Test spray hook; 12. Second two-position three-way solenoid directional valve; 13. First flow meter; 14. Second flow meter; 15. Second relief valve. Implementation

[0026] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. In addition, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation", "connection", and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this invention can be understood through the specific circumstances.

[0028] The present invention will be further described below with reference to the accompanying drawings:

[0029] like Figure 1As shown, a testing machine for the opening pressure and flow rate of a spray hook assembly includes an oil tank 1, a hydraulic pump 4, a speed control valve 5, a pressure sensor 6, a first two-position three-way solenoid directional valve 7, a first overflow valve 8, a check valve 9, a pressure relay 10, a spray hook under test 11, a second two-position three-way solenoid directional valve 12, a first flow meter 13, a second flow meter 14, and a second overflow valve 15. The input end of the hydraulic pump 4 extends into the oil tank 1 through a pipe, and the hydraulic pump 4 is used to pump oil. The output end of the hydraulic pump 4 is sealed to the input end of the speed control valve 5 through a pipe. The output end of the speed control valve 5 is sealed to the input end of the first two-position three-way solenoid directional valve 7 through a pipe, and the speed control valve 5 is used to adjust the pressure and flow rate of the spray hook assembly. To control the oil flow rate, one output end of the first two-position three-way solenoid directional valve 7 is sealed to the input end of the check valve 9 via a pipe. The other output end of the first two-position three-way solenoid directional valve 7 and the output end of the check valve 9 are both sealed to the two ports of a three-way pipe via pipes. The third port of the three-way pipe is sealed to the input end of the tested spray hook 11 via a pipe. The output end of the tested spray hook 11 is sealed to the input end of the second two-position three-way solenoid directional valve 12 via a pipe. The two input ends of the second two-position three-way solenoid directional valve 12 are sealed to the input ends of the first flow meter 13 and the second flow meter 14 via pipes, respectively. The first two-position three-way solenoid directional valve 7 and the second... Two-position three-way solenoid directional valves 12 are used to switch oil circuits. The outputs of the first flow meter 13 and the second flow meter 14 extend to the oil tank 1 through pipes. The pipe between the hydraulic pump 4 and the speed control valve 5 is sealed to the input of the second relief valve 15, and the output of the second relief valve 15 extends to the oil tank 1 through a pipe. The pipe between the first two-position three-way solenoid directional valve 7 and the check valve 9 is sealed to the input of the first relief valve 8, and the output of the first relief valve 8 extends to the oil tank 1 through a pipe. The first relief valve 8 and the second relief valve 15 are used for overflow. The pipe between the three-way pipe and the measured spray hook 11 is sealed to the input of the pressure relay 10. Connect; the first two-position three-way solenoid directional valve 7 normally connects to the pipeline where the check valve 9 is located, and the second two-position three-way solenoid directional valve 12 normally connects to the pipeline where the second flow meter 14 is located; a filter 2 is installed on the pipeline between the hydraulic pump 4 and the oil tank 1, and the filter 2 is used to filter the oil; the hydraulic pump 4 is driven by the motor 3; the pressure relay 10, the second two-position three-way solenoid directional valve 12, and the second flow meter 14 are used to detect whether the minimum opening pressure of the spray hook is qualified; the first relief valve 8 and the check valve 9 are used to detect whether the maximum opening pressure of the spray hook is qualified; the speed control valve 5, the first two-position three-way solenoid directional valve 7, and the first flow meter 13 are used to measure the flow rate through the spray hook under a specific pressure.

[0030] A method for testing the opening pressure and flow rate of a spray hook assembly, using the above-mentioned tester for the opening pressure and flow rate of the spray hook assembly, specifically includes a method for testing the opening pressure of the spray hook and a method for testing the flow rate of the spray hook.

[0031] The test method for the opening pressure of the spray hook is as follows:

[0032] ① Before the test, adjust the pressure relay 10 to the minimum opening pressure of the spray hook under test, and adjust the first overflow valve 8 to the maximum opening pressure of the spray hook under test.

[0033] ② Start the hydraulic pump 4 to draw oil from the oil tank 1. The oil in the oil tank 1 passes through the filter 2, hydraulic pump 4, speed controller, first two-position three-way solenoid directional valve 7, and check valve 9 in sequence to reach the input end of the spray hook 11 to be tested.

[0034] ③ When the test pressure is lower than the minimum pressure, the steel ball of the spray hook assembly opens, and the spray hook 11 under test does not meet the requirements. At this time, the first flow meter has no reading, but the second flow meter 14 will have a reading.

[0035] If the steel ball of the spray hook assembly still does not open when the test pressure is higher than the maximum pressure, then the spray hook 11 under test does not meet the requirements. At this time, the first overflow valve 8 opens, the oil flows back to the oil tank 1, the first flow meter 13 has no reading, and the second flow meter 14 has no reading.

[0036] When the test pressure is between the minimum and maximum pressure, the steel ball of the spray hook assembly opens, and the spray hook 11 under test meets the requirements. At this time, the pressure relay 10 is triggered, the second two-position three-way solenoid valve 12 is energized, the first flow meter 13 shows a reading, and the second flow meter 14 does not show a reading.

[0037] The test method for the flow rate of the spray hook is as follows:

[0038] ① The tested spray hook 11 meets the requirements after testing. The second overflow valve 15 is used as a safety valve. The pressure sensor 6 displays the system pressure in real time.

[0039] ② When the first two-position three-way solenoid valve 7 is energized, the system pressure is adjusted to a specific pressure by adjusting the speed control valve 5. The reading of the first flow meter 13 is the flow rate through the measured spray hook 11 under the specific pressure.

[0040] ③ After the test is completed, the first and second position three-way solenoid valves 7 are de-energized, and the tester enters the next test cycle;

[0041] ④ The worker replaces the spray hook 11 under test for the next test.

[0042] Filter 2, motor 3, hydraulic pump 4, speed control valve 5, pressure sensor 6, first two-position three-way solenoid directional valve 7, first relief valve 8, check valve 9, pressure relay 10, spray hook under test 11, second two-position three-way solenoid directional valve 12, first flow meter 13, second flow meter 14, second relief valve 15, and three-way pipe are all general standard parts or components known to those skilled in the art. Their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods, so they will not be described in detail here.

[0043] The foregoing has shown and described the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are only illustrative of the principles of the present invention. Various changes and modifications can be made to the present invention without departing from the spirit and scope of the present invention, and all such changes and modifications fall within the scope of the present invention as claimed.

Claims

1. A test machine for opening pressure and flow of a spray hook assembly, characterized by: The hydraulic system comprises an oil tank (1), a hydraulic pump (4), a speed regulating valve (5), a pressure sensor (6), a first two-position three-way electromagnetic reversing valve (7), a first overflow valve (8), a one-way valve (9), a pressure relay (10), a measured spray hook (11), a second two-position three-way electromagnetic reversing valve (12), a first flowmeter (13), a second flowmeter (14) and a second overflow valve (15). The input end of the hydraulic pump (4) extends into the oil tank (1) through a pipeline, the output end of the hydraulic pump (4) is connected to the input end of the speed regulating valve (5) through a pipeline, the output end of the speed regulating valve (5) is connected to the input end of the first two-position three-way electromagnetic reversing valve (7) through a pipeline, one output end of the first two-position three-way electromagnetic reversing valve (7) is connected to the input end of the one-way valve (9) through a pipeline, the other output end of the first two-position three-way electromagnetic reversing valve (7) and the output end of the one-way valve (9) are both connected to two ports of a three-way pipe through pipelines, the third port of the three-way pipe is connected to the input end of the measured spray hook (11) through a pipeline, the output end of the measured spray hook (11) is connected to the input end of the second two-position three-way electromagnetic reversing valve (12) through a pipeline, the two input ends of the second two-position three-way electromagnetic reversing valve (12) are respectively connected to the input ends of the first flowmeter (13) and the second flowmeter (14) through pipelines, the output ends of the first flowmeter (13) and the second flowmeter (14) extend into the oil tank (1) through pipelines; the pipeline between the hydraulic pump (4) and the speed regulating valve (5) is connected to the input end of the second overflow valve (15), the output end of the second overflow valve (15) extends into the oil tank (1) through a pipeline, the pipeline between the first two-position three-way electromagnetic reversing valve (7) and the one-way valve (9) is connected to the input end of the first overflow valve (8), the output end of the first overflow valve (8) extends into the oil tank (1) through a pipeline, and the pipeline between the three-way pipe and the measured spray hook (11) is connected to the input end of the pressure relay (10); the first two-position three-way electromagnetic reversing valve (7) is normally on the pipeline where the one-way valve (9) is located, and the second two-position three-way electromagnetic reversing valve (12) is normally on the pipeline where the second flowmeter (14) is located.

2. The test machine for opening pressure and flow of a spray hook assembly according to claim 1, characterized in that: A filter (2) is installed on the pipeline between the hydraulic pump (4) and the oil tank (1).

3. The test machine for opening pressure and flow of a spray hook assembly according to claim 2, characterized in that: The hydraulic pump (4) is driven by a motor (3).

4. A method for testing the opening pressure and flow rate of a spray hook assembly, characterized in that: The spray hook assembly according to claim 3 is used to open the pressure and flow of a test machine, and the specific method comprises a test method of opening pressure of the spray hook and a test method of flow of the spray hook.

5. The method of claim 4, wherein: The test method of opening pressure of the spray hook is as follows: ①The pressure relay (10) is adjusted to the lowest opening pressure of the tested spray hook before the test, and the first overflow valve (8) is adjusted to the highest opening pressure of the tested spray hook before the test; ②Start the hydraulic pump (4) from the oil tank (1) oil, oil tank (1) in the oil in turn through the filter (2), hydraulic pump (4), speed regulator, the first two-way three-way solenoid valve (7), check valve (9) to the measured spray hook (11) input end; ③When the test pressure is lower than the minimum pressure, the spray hook assembly steel ball opens, and the measured spray hook (11) does not meet the requirements, at this time the first flow has no indication, the second flowmeter (14) will have an indication; When the test pressure is higher than the maximum pressure, the spray hook assembly steel ball is still not opened, and the measured spray hook (11) does not meet the requirements, at this time the first overflow valve (8) opens, the oil flows back to the oil tank (1), the first flowmeter (13) has no indication, and the second flowmeter (14) has no indication; When the test pressure is between the minimum pressure and the maximum pressure, the spray hook assembly steel ball opens, and the measured spray hook (11) meets the requirements, at this time the pressure relay (10) triggers, the second two-way three-way solenoid valve (12) is powered, the first flowmeter (13) has an indication, and the second flowmeter (14) has no indication.

6. The method of claim 4, wherein the method further comprises: The test method of the flow of the spray hook is: ①The measured spray hook (11) meets the requirements after testing, the second overflow valve (15) is used as a safety valve, and the pressure sensor (6) displays the system pressure in real time; ②The first two-way three-way solenoid valve (7) is powered, the system pressure is adjusted to a specific pressure by adjusting the speed regulating valve (5), and the first flowmeter (13) indicates the flow through the measured spray hook (11) at the specific pressure; ③After testing, the first two-way three-way solenoid valve (7) loses power, and the tester enters the next test cycle; ④Workers replace the measured spray hook (11) for the next test.

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