阅读说明：本技术 一种用于橡胶膜片的疲劳测试机 (Fatigue testing machine for rubber diaphragm ) 是由 于广益 成鹏 马普东 于 2019-10-10 设计创作，主要内容包括：本发明公开了一种用于橡胶膜片的疲劳测试机,包括支架平台、底托、隔膜、压块和增压泵,支架平台表面设置有卡口,隔膜设置于卡口上方,底托与卡口连接且位于隔膜下方,隔膜与底托密封连接,底托上设置有进气孔和出气孔,增压泵通过进气管连接进气孔,出气孔连接有出气管,进气管和出气管均由控制阀控制通断,压块放置于隔膜上方,增压泵和控制阀电连接控制器。本发明通过充放气实现隔膜的运动控制,同时利用压块建立隔膜所受的阻力,减少了机械传动,降低整体设备的疲劳损伤,保证设备的稳定运行,提高测试设备的使用寿命。(The invention discloses a fatigue testing machine for a rubber diaphragm, which comprises a support platform, a bottom support, a diaphragm, a pressing block and a pressurizing pump, wherein a bayonet is arranged on the surface of the support platform, the diaphragm is arranged above the bayonet, the bottom support is connected with the bayonet and is positioned below the diaphragm, the diaphragm is hermetically connected with the bottom support, an air inlet hole and an air outlet hole are arranged on the bottom support, the pressurizing pump is connected with the air inlet hole through an air inlet pipe, the air outlet hole is connected with an air outlet pipe, the air inlet pipe and the air outlet pipe are controlled to be switched on and off by a control. The invention realizes the motion control of the diaphragm through inflation and deflation, and simultaneously utilizes the pressing block to establish the resistance borne by the diaphragm, thereby reducing the mechanical transmission, reducing the fatigue damage of the whole equipment, ensuring the stable operation of the equipment and prolonging the service life of the testing equipment.)

1. The utility model provides a fatigue test machine for rubber diaphragm, its characterized in that, includes supporting platform, collet, diaphragm, briquetting and booster pump, the supporting platform surface is provided with the bayonet socket, the diaphragm set up in the bayonet socket top, the collet with bayonet coupling just is located the collet below, the diaphragm with collet sealing connection, be provided with inlet port and venthole on the collet, the booster pump passes through intake-tube connection the inlet port, the venthole is connected with the outlet duct, intake-tube and outlet duct are by the control valve break-make, the briquetting is placed in the diaphragm top, booster pump and control valve electric connection director.

2. The fatigue testing machine for rubber diaphragms according to claim 1, wherein a guide rail assembly is further fixed on the support platform, and the pressing block is slidably connected with the guide rail assembly.

3. the fatigue testing machine for the rubber diaphragm as claimed in claim 2, wherein the guide rail assembly comprises a fixing frame, a guide groove and a guide post, the guide groove is fixedly connected with the support platform through the fixing frame, one end of the guide post is connected with the center of the pressing block, and the other end of the guide post is in limit connection with the guide groove.

4. A fatigue testing machine for a rubber diaphragm according to claim 2, wherein a counter is provided on said rail assembly.

5. The fatigue testing machine for the rubber diaphragm as claimed in claim 1, wherein the bottom support is a basin shape with a flange, a supporting step is arranged around the bayonet, and the bottom support is clamped on the supporting step.

6. The fatigue testing machine for the rubber diaphragm as in claim 5, wherein a basin-shaped diameter of the bottom support is matched with the diaphragm, the diaphragm is fixedly connected with a flange edge of the bottom support through a pressing ring, and a sealing ring is arranged between the diaphragm and the bottom support.

7. The fatigue testing machine for the rubber diaphragm as claimed in claim 1, wherein a constant pressure gas chamber is further communicated between the booster pump and the shoe, and a sealing space between the diaphragm and the shoe is much smaller than the volume of the constant pressure gas chamber.

8. The fatigue testing machine for rubber diaphragms according to claim 1, wherein one or more of a heating and refrigerating device, a humidifying device, a dehumidifying device, a salt spray device and a ray activating device are arranged around the supporting platform, and each device is electrically connected with the controller.

9. The fatigue testing machine for the rubber diaphragm as claimed in claim 8, wherein the heating and refrigerating device is a compressor combined with a plate type heat exchanger, the humidifying device is an isothermal humidifier, the dehumidifying device is a compressor combined with a heat exchanger, the salt spray device is a salt spray system, and the radiation activating device is an X-ray generator.

10. The fatigue testing machine for rubber diaphragms according to claim 8, wherein the heating and refrigerating device, the humidifying device, the dehumidifying device, the salt spray device and the ray activating device are all connected around the constant-pressure air bin.

Technical Field

The invention relates to the technical field of rubber diaphragm test equipment, in particular to a fatigue test machine for a rubber diaphragm.

Background

The rubber diaphragm is used in a pneumatic actuating mechanism of a valve of an automatic pipeline and performs frequent turnover movement, the diaphragm is often out of work due to fatigue, once the diaphragm is out of work, an air chamber of the pneumatic actuating mechanism cannot build pressure, the valve stops working, the whole pipeline is out of work, and particularly, the rubber diaphragm causes great loss for continuous working environments needing nuclear power, chemical engineering, water conservancy and the like.

The rubber diaphragm is a vulnerable part, and the fatigue strength of the rubber diaphragm often determines the service life of the diaphragm pump after one-time maintenance. Therefore, the fatigue strength test of the rubber diaphragm is the most important content of the product quality test. In the prior art, when a fatigue test is performed on a rubber diaphragm, a common method is to simulate a diaphragm pump structure and drive the rubber diaphragm through a series of mechanical linkage structures, so that on one hand, a mechanical mechanism is complex and high in cost, on the other hand, the mechanical structure is also fatigued, and the service life of test equipment is shortened.

Disclosure of Invention

The invention aims to provide a fatigue testing machine for rubber diaphragms, which is simple in structure, does not need to be driven by a mechanical linkage structure, is suitable for diaphragms with various specifications and sizes, and is low in cost and long in service life.

In order to solve the technical problem, the invention provides a fatigue testing machine for a rubber diaphragm, which comprises a support platform, a bottom support, a diaphragm, a pressing block and a booster pump, wherein a bayonet is arranged on the surface of the support platform, the diaphragm is arranged above the bayonet, the bottom support is connected with the bayonet and is positioned below the diaphragm, the diaphragm is hermetically connected with the bottom support, an air inlet hole and an air outlet hole are arranged on the bottom support, the booster pump is connected with the air inlet hole through an air inlet pipe, the air outlet hole is connected with an air outlet pipe, the air inlet pipe and the air outlet pipe are both controlled by a control valve to be switched on and off, the pressing block is arranged above the diaphragm, and the.

Further, a guide rail assembly is further fixed on the support platform, and the pressing block is connected with the guide rail assembly in a sliding mode.

Furthermore, the guide rail assembly comprises a fixing frame, a guide groove and a guide pillar, the guide groove is fixedly connected with the support platform through the fixing frame, one end of the guide pillar is connected with the center of the pressing block, and the other end of the guide pillar is in limit connection with the guide groove.

Further, a counter is arranged on the guide rail assembly.

Further, the collet is of a basin shape with a flange edge, a supporting step is arranged on the periphery of the bayonet, and the collet is clamped on the supporting step.

further, the basin shape diameter of collet with the diaphragm phase-match, the diaphragm pass through the clamping ring with the flange limit fixed connection of collet, the diaphragm with be provided with the sealing washer between the collet.

Further, the booster pump with still communicate there is the constant voltage gas storehouse between the collet, the diaphragm with sealed space between the collet is far less than the volume in constant voltage gas storehouse.

Furthermore, one or a combination of a plurality of heating and refrigerating devices, humidifying devices, dehumidifying devices, salt fog devices and ray activating devices are arranged around the support platform, and all the devices are electrically connected with the controller.

Further, the heating and refrigerating device is a compressor combined plate type heat exchanger, the humidifying device is an isothermal humidifier, the dehumidifying device is a compressor combined heat exchanger, the salt spray device is a salt spray system, and the ray activating device is an X-ray generator.

Furthermore, the heating and refrigerating device, the humidifying device, the dehumidifying device, the salt spray device and the ray activating device are all connected to the periphery of the constant-pressure air bin.

Compared with the prior art, the fatigue testing machine for the rubber diaphragm has the advantages that the movement control of the diaphragm is realized through inflation and deflation, and meanwhile, the resistance borne by the diaphragm is established by utilizing the pressing block, so that the mechanical transmission is reduced, the fatigue damage of the whole equipment is reduced, the stable operation of the equipment is ensured, and the service life of the testing equipment is prolonged.

Drawings

FIG. 1 is a schematic diagram of an overall structure of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of an overall construction of an embodiment of the present invention;

FIG. 3 is a schematic diagram of the overall structure of the second embodiment of the present invention;

FIG. 4 is a diagram showing the results of comparing the testing machine of the present invention with the conventional testing machine.

Detailed Description

The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.

Referring to fig. 1, which is a schematic overall structure diagram of an embodiment of a fatigue testing machine for rubber diaphragms in accordance with the present invention, the device comprises a bracket platform 10, a bottom support 20, a diaphragm 30, a pressing block 40 and a booster pump 50, the surface of the support platform 10 is provided with a bayonet 11, the diaphragm 30 is arranged above the bayonet 11, the mounting 20 is connected with the bayonet 11 and is positioned below the diaphragm 30, the diaphragm 30 is connected with the mounting 20 in a sealing way, a sealing space is formed between the diaphragm 30 and the mounting 20, the bottom support 20 is provided with an air inlet 21 and an air outlet 22, the booster pump 50 is connected with the air inlet 21 through an air inlet pipe, the air outlet hole 22 is connected with an air outlet pipe, the air inlet pipe and the air outlet pipe are controlled by a control valve 61 to be on and off, the pressing block 40 is placed above the diaphragm 30, and the booster pump 50 and the control valve 61 are electrically connected to the controller 60. Through setting up horizontally support platform 10, make diaphragm 30 can the tiling in support platform 10 top, setting up through bayonet 11 makes diaphragm 30 and collet 20 form the confined space, when aerifing the inlet port 21 through booster pump 50, the pressure in the confined space increases, with diaphragm 30 jack-up, then controller 60 drive control booster pump 50 closes, and adjust control valve 61 and close the intake pipe, open the outlet duct gassing, diaphragm 30 resets, for the resistance that simulation diaphragm 30 received, briquetting 40 has been placed to diaphragm 30 top. In this embodiment, realize diaphragm 30's motion control through inflating and deflating, utilize briquetting 40 to establish the resistance that diaphragm 30 received simultaneously, mechanical transmission has been reduced, reduce the fatigue damage of whole equipment, guarantee the steady operation of equipment, improve test equipment's life, and can also leak gas more convenient detection diaphragm 30 through observing diaphragm 30 and have or not damaged, when testing different specification and size's diaphragm 30, only need to change the simulation that different masses of briquetting 40 can realize different resistances, better simulation diaphragm 30 is in the atress condition of running state, make the test result more accurate, improve equipment's commonality. Further, because the surface of the diaphragm 30 is not flat when bulging, in order to ensure that the pressing block 40 can be stably placed above the diaphragm 30, the support platform 10 is further fixed with a guide rail assembly 70, the pressing block 40 is slidably connected with the guide rail assembly 70, the direction of the pressing block 40 is controlled by the guide rail assembly 70, and the pressing block 40 is ensured to be stably located above the diaphragm 30.

referring to fig. 2, which is a cross-sectional view of the testing apparatus of this embodiment, in this embodiment, the guide rail assembly 70 includes a fixing frame 71, a guide groove 72, and a guide post 73, the guide groove 72 is fixedly connected to the support platform 10 through the fixing frame 71, one end of the guide post 73 is connected to the center of the pressing block 40, and the other end of the guide post is connected to the guide groove 72 in a limiting manner. In order to ensure the uniform stress of the diaphragm 30, the gravity of the pressing block 40 is ensured to act on the center of the diaphragm 30 vertically, so that the guide groove 72 is arranged above the center of the diaphragm 30 through the fixing frame 71, the guide post 73 is connected with the center of the pressing block 40, and when the pressing block 40 drives the guide post 73 to reciprocate up and down, the friction force between the guide post 73 and the guide groove 72 is also positioned above the center of the pressing block 40, thereby ensuring the uniform pressure of the pressing block 40 on the diaphragm 30. Meanwhile, the guide post 73 is limited by the guide groove 72, so that the pressing block 40 cannot excessively press the diaphragm 30 downwards, the stroke of the diaphragm 30 during bulging is limited, and the real running state of the diaphragm 30 is better simulated. Further, to facilitate the output of the test results, a counter 74 is provided on the rail assembly 70, and the counter 74 counts every time the diaphragm 30 moves.

Referring to fig. 2, the bottom support 20 is a basin with a flange, a supporting step 12 is arranged around the bayonet 11, the bottom support 20 is directly clamped on the supporting step 12, so that the bottom support 20 is convenient to replace, and a certain distance exists between the bottom surface of the bottom support 20 and the diaphragm 30 in a normal state, so that when the air inlet on the bottom support 20 is used for inflating, the airflow cannot directly impact the diaphragm 30, and the bottom support 20 is fully distributed in the space of the bottom support 20, so that the diaphragm 30 is wholly and uniformly pressed. Further, the basin type diameter of collet 20 with diaphragm 30 phase-match can realize different test conditions through changing collet 20 when testing different specification and dimension's diaphragm 30, diaphragm 30 all around through clamping ring 31 with collet 20's flange limit fixed connection, clamping ring 31 and collet 20 pass through the fastener locking, and diaphragm 30 directly links to each other with collet 20, guarantees leakproofness between the two, and is further still diaphragm 30 with be provided with sealing washer 23 between collet 20, realize that diaphragm 30 and collet 20 close gas.

Referring to fig. 3, which is a schematic structural diagram of an embodiment of the present invention, in this embodiment, a constant pressure air chamber 80 is further communicated between the booster pump 50 and the bottom support 20, and a sealed space between the diaphragm 30 and the bottom support 20 is much smaller than a volume of the constant pressure air chamber 80. Because the inflation pressure of the booster pump 50 cannot be kept stable, that is, the diaphragm 30 cannot be uniformly stressed in the bulging process, a large constant-pressure air chamber 80 is arranged in the embodiment to ensure that stable pressure can be provided when the space between the diaphragm 30 and the bottom support 20 is inflated, and the booster pump 50 is used for supplementing the pressure of the air chamber 80 to better simulate the stress condition of the diaphragm 30 in the real operation state. In this embodiment, one or more of a heating and cooling device 81, a humidifying device 82, a dehumidifying device 83, a salt spray device 84 and a radiation activation device 85 are further disposed around the rack platform 10, and each device is electrically connected to the controller 60. Since the fatigue properties of the membrane 30 are also influenced by the environment (temperature, humidity, gas composition, etc.), even some special conditions, such as those used in nuclear power plants, require irradiation to be taken into account. Various environment simulation devices are arranged in the embodiment to simulate the environments such as temperature, humidity, gas components and radiation under the actual operation working condition of the diaphragm 30, so that the test result is closer to the actual value. The test data under various environments can be provided through parameter setting combination, and effective support is provided for research and development. In this embodiment, the heating and cooling device 81 is a compressor combined plate heat exchanger, the humidifying device 82 is an isothermal humidifier, the dehumidifying device 83 is a compressor combined heat exchanger, the salt spray device 84 is a salt water spray system, and the radiation activation device 85 is an X-ray generator. Are all prior art and are output based on the environmental parameters required for testing, depending on the settings of the controller 60. In this embodiment, in order to facilitate the overall arrangement and transfer of the additional devices, the heating and cooling device 81, the humidifying device 82, the dehumidifying device 83, the salt spray device 84 and the ray activating device 85 are all connected around the constant pressure air chamber 80 to form an integral structure.

Referring to fig. 4, a comparison test of the testing machine of the present embodiment with a normal diaphragm and a fatigue testing machine in the prior art shows that the fatigue testing machine of the present embodiment is more consistent with the normal operation state of the diaphragm.

The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention. The protection scope of the invention is subject to the claims.