CN107957315A - A kind of pressure-resistant fatigue experimental device of pressure gauge - Google Patents
A kind of pressure-resistant fatigue experimental device of pressure gauge Download PDFInfo
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Abstract
本发明公开了一种压力表耐压疲劳试验装置，包括用于与待测压力表连通的管道以及压力输出系统，该压力输出系统用于向管道中输入液体，压力输出系统包括：液压缸、活塞、活塞杆以及动力输出装置。本发明采用液压缸作为压力输出装置，因液体的压缩量非常小，可以认为是仅仅依靠的液体连续流动进行传动，其传动平稳且较凸轮机构更容易获得较大的力，另外液压机构不易磨损、寿命长、噪声小，因而能够有效解决现有技术中遇到的问题。
The invention discloses a pressure gauge fatigue test device, which comprises a pipeline for communicating with the pressure gauge to be tested and a pressure output system. The pressure output system is used for inputting liquid into the pipeline. The pressure output system includes: a hydraulic cylinder, Piston, piston rod and power take-off. The present invention uses a hydraulic cylinder as the pressure output device. Because the compression of the liquid is very small, it can be considered that it only relies on the continuous flow of the liquid for transmission. Its transmission is stable and it is easier to obtain greater force than the cam mechanism. In addition, the hydraulic mechanism is not easy to wear , long service life and low noise, thus effectively solving the problems encountered in the prior art.
Description
技术领域technical field
本发明涉及一种压力表耐压疲劳试验装置。The invention relates to a pressure gauge fatigue test device.
背景技术Background technique
压力表是指以弹性元件为敏感元件，测量并指示高于环境压力的仪表，应用极为普遍，它几乎遍及所有的工业流程和科研领域。在热力管网、油气传输、供水供气系统、车辆维修保养厂店等领域随处可见。尤其在工业过程控制与技术测量过程中，由于机械式压力表的弹性敏感元件具有很高的机械强度以及生产方便等特性，使得机械式压力表得到越来越广泛的应用。A pressure gauge is an instrument that uses elastic elements as sensitive elements to measure and indicate pressure higher than the environment. It is widely used, and it pervades almost all industrial processes and scientific research fields. It can be seen everywhere in heat pipe network, oil and gas transmission, water supply and gas supply system, vehicle repair and maintenance factory and shop. Especially in the process of industrial process control and technical measurement, due to the high mechanical strength and convenient production of the elastic sensitive components of mechanical pressure gauges, mechanical pressure gauges are more and more widely used.
压力表在使用的过程中，特别是在一些极限条件下，如高压或者持续高压下可能会发生疲劳损坏，因此压力表在出厂先需要对其进行疲劳测试。During the use of the pressure gauge, especially under some extreme conditions, such as high pressure or continuous high pressure, fatigue damage may occur, so the pressure gauge needs to be tested for fatigue before leaving the factory.
现有技术中，对压力表的疲劳测试通常都是凸轮机构，上下限控制受限，适应范围窄；无法实现多种波形的试验；噪声大；磨损快；无法实现频率的改变和调整。In the prior art, the fatigue test of the pressure gauge is usually a cam mechanism, the control of the upper and lower limits is limited, and the scope of application is narrow; the test of various waveforms cannot be realized; the noise is large; the wear is fast; the frequency change and adjustment cannot be realized.
发明内容Contents of the invention
本发明的目的在于能够克服现有技术中的不足，提供一种能够对压力表进行疲劳测试装置。The purpose of the present invention is to overcome the deficiencies in the prior art and provide a device capable of performing fatigue testing on pressure gauges.
为达此目的，本发明采用以下技术方案：For reaching this purpose, the present invention adopts following technical scheme:
一种压力表耐压疲劳试验装置，包括用于与待测压力表连通的管道以及压力输出系统，该压力输出系统用于向所述管道中输入液体，其特征在于，所述压力输出系统包括：A pressure gauge fatigue test device, comprising a pipeline for communicating with the pressure gauge to be tested and a pressure output system, the pressure output system is used to input liquid into the pipeline, characterized in that the pressure output system includes :
液压缸，所述管道自所述液压缸的一端穿过，并与其中的液体连通，所述管道与所述液压缸的内壁保持固定密封；A hydraulic cylinder, the pipeline passes through one end of the hydraulic cylinder and communicates with the liquid therein, and the pipeline is fixed and sealed with the inner wall of the hydraulic cylinder;
活塞，与所述液压缸的内壁滑动密封连接，该活塞上还固定连接有能够伸出所述液压缸的活塞杆；The piston is in sliding and sealing connection with the inner wall of the hydraulic cylinder, and the piston is also fixedly connected with a piston rod capable of extending out of the hydraulic cylinder;
动力输出装置，该动力输出装置用于驱动所述活塞杆沿着所述活塞的轴线做往复直线运动。A power output device, the power output device is used to drive the piston rod to perform reciprocating linear motion along the axis of the piston.
作为本发明的进一步改进，所述动力输出装置包括：As a further improvement of the present invention, the power output device includes:
固定连接在所述活塞杆上，并与该活塞杆同轴心设置的蜗杆；a worm fixedly connected to the piston rod and arranged concentrically with the piston rod;
位置固定并可做旋转运动的蜗轮；Worm gear with fixed position and rotary motion;
用于驱动所述蜗轮做旋转运动的电机。A motor used to drive the worm gear to rotate.
作为本发明的进一步改进，还设有与所述液压缸内腔连通的输液管，该输液管另一端连接有液体缸，所述液体缸通过连接在所述输液管上的液压泵向所述液压缸内输入液体或者由所述液压缸向所述液压泵输出液体。As a further improvement of the present invention, there is also an infusion tube communicated with the inner cavity of the hydraulic cylinder, and the other end of the infusion tube is connected with a liquid cylinder, and the liquid cylinder is supplied to the Liquid is input into the hydraulic cylinder or output from the hydraulic cylinder to the hydraulic pump.
作为本发明的进一步改进，所述输液管上还设置有用于控制所述输液管通断的高压阀。As a further improvement of the present invention, the infusion tube is also provided with a high-pressure valve for controlling the on-off of the infusion tube.
作为本发明的进一步改进，所述管道上并联有至少两个测试管道，每个所述测试管道上均连通有一个所述待测压力表。As a further improvement of the present invention, at least two test pipelines are connected in parallel to the pipeline, and each of the test pipelines is connected to a pressure gauge to be tested.
作为本发明的进一步改进，每个所述测试管道上还设有与其中的所述待测压力表串联的开关阀，该开关阀用于限制或者允许所述测管道中的液体流入所述待测压力表中。As a further improvement of the present invention, each of the test pipelines is also provided with a switch valve connected in series with the pressure gauge to be tested therein, and the switch valve is used to limit or allow the liquid in the test pipeline to flow into the pressure gauge to be tested. in the pressure gauge.
作为本发明的进一步改进，所述管道中还设有若干与所述测试管道并联的辅助管道，该辅助管道上设置有高压表或低压表或相互并联的高压表与低压表。As a further improvement of the present invention, the pipeline is also provided with several auxiliary pipelines connected in parallel with the test pipeline, and the auxiliary pipelines are provided with high-pressure gauges or low-pressure gauges or high-pressure gauges and low-pressure gauges connected in parallel.
作为本发明的进一步改进，As a further improvement of the present invention,
所述辅助管道上还设有分别用于控制液体流入所述高压表和低压表的第一截止阀和第二截止阀；The auxiliary pipeline is also provided with a first shut-off valve and a second shut-off valve for respectively controlling the flow of liquid into the high-pressure gauge and the low-pressure gauge;
所述所述辅助管道上还设有分别与所述高压表和低压表串联的第一压力传感器和第二压力传感器；The auxiliary pipeline is also provided with a first pressure sensor and a second pressure sensor connected in series with the high pressure gauge and the low pressure gauge respectively;
所述第一压力传感器和第二压力传感器分别与所述第一截止阀和第二截止阀电连接，并规定在所述第一压力传感器和第二压力传感器监测到流经其中的液体压力值高于设定的临界值时，控制所述第一截止阀和第二截止阀断开；The first pressure sensor and the second pressure sensor are electrically connected to the first cut-off valve and the second cut-off valve respectively, and it is stipulated that the pressure value of the liquid flowing through it is monitored by the first pressure sensor and the second pressure sensor When it is higher than the set critical value, control the first cut-off valve and the second cut-off valve to disconnect;
所述临界值分别为所述高压表和低压表能够承受的最大压力值。The critical values are respectively the maximum pressure values that the high pressure gauge and the low pressure gauge can bear.
作为本发明的进一步改进，As a further improvement of the present invention,
所述液压缸的外壁上固定设置有具有空心内腔的壳体；A housing with a hollow inner cavity is fixedly arranged on the outer wall of the hydraulic cylinder;
所述蜗轮转动连接在所述壳体内，并能接收所述电机输出扭矩；The worm gear is rotatably connected in the housing and can receive the output torque of the motor;
所述蜗杆设置于所述壳体内，并能部分伸出于该壳体与所述活塞杆连接，所述蜗杆与所述壳体间的配合能够限制所述蜗杆做旋转运动。The worm is arranged in the housing, and can partially protrude from the housing to connect with the piston rod, and the cooperation between the worm and the housing can limit the rotation of the worm.
作为本发明的进一步改进，所述电机为伺服电机。As a further improvement of the present invention, the motor is a servo motor.
本发明的有益效果为，本发明采用液压缸作为压力输出装置，因液体的压缩量非常小，可以认为是仅仅依靠的液体连续流动进行传动，其传动平稳且较凸轮机构更容易获得较大的力，另外液压机构不易磨损、寿命长、噪声小，因而能够有效解决现有技术中遇到的问题。The beneficial effect of the present invention is that the hydraulic cylinder is used as the pressure output device in the present invention. Since the compression amount of the liquid is very small, it can be considered that it only relies on the continuous flow of the liquid for transmission. Its transmission is stable and it is easier to obtain a larger pressure than the cam mechanism. In addition, the hydraulic mechanism is not easy to wear, has a long service life and low noise, so it can effectively solve the problems encountered in the prior art.
附图说明Description of drawings
图1是本发明的结构示意图；Fig. 1 is a structural representation of the present invention;
图2是动力竖直装置与液压缸的结构示意图；Fig. 2 is the structural representation of power vertical device and hydraulic cylinder;
图中：1-待测压力表；2-管道；4-压力输出系统；6-液压缸；8-活塞；10-活塞杆；12-动力输出装置；14-蜗杆；18-电机；20-输液管；22-液体缸；24-液压泵；26-高压阀；28-测试管道；30-开关阀；32-辅助管道；34-高压表；36-低压表；38-第一截止阀；40-第二截止阀；42-第一压力传感器；44-第二压力传感器；46-壳体。In the figure: 1-pressure gauge to be tested; 2-pipeline; 4-pressure output system; 6-hydraulic cylinder; 8-piston; 10-piston rod; 12-power output device; 14-worm; 18-motor; 20- Infusion tube; 22-liquid cylinder; 24-hydraulic pump; 26-high pressure valve; 28-test pipeline; 30-switch valve; 32-auxiliary pipeline; 34-high pressure gauge; 36-low pressure gauge; 40-second stop valve; 42-first pressure sensor; 44-second pressure sensor; 46-housing.
具体实施方式Detailed ways
下面结合附图并通过具体实施方式来进一步说明本发明的技术方案。The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods.
如图1至2所示，本发明包括用于与待测压力表1连通的管道2以及压力输出系统4，该压力输出系统4用于向所述管道2中输入液体，其特征在于，所述压力输出系统4包括：As shown in Figures 1 to 2, the present invention includes a pipeline 2 for communicating with the pressure gauge 1 to be tested and a pressure output system 4, the pressure output system 4 is used to input liquid into the pipeline 2, characterized in that the The pressure output system 4 includes:
液压缸6，所述管道2自所述液压缸6的一端穿过，并与其中的液体连通，所述管道2与所述液压缸6的内壁保持固定密封；A hydraulic cylinder 6, the pipeline 2 passes through one end of the hydraulic cylinder 6, and communicates with the liquid therein, and the pipeline 2 is kept fixed and sealed with the inner wall of the hydraulic cylinder 6;
活塞8，与所述液压缸6的内壁滑动密封连接，该活塞8上还固定连接有能够伸出所述液压缸6的活塞杆10；The piston 8 is in sliding and sealing connection with the inner wall of the hydraulic cylinder 6, and the piston 8 is also fixedly connected with a piston rod 10 that can extend out of the hydraulic cylinder 6;
动力输出装置12，该动力输出装置12用于驱动所述活塞杆10沿着所述活塞8的轴线做往复直线运动。A power output device 12 , the power output device 12 is used to drive the piston rod 10 to make a reciprocating linear motion along the axis of the piston 8 .
作为本发明的进一步改进，所述动力输出装置12包括：As a further improvement of the present invention, the power output device 12 includes:
固定连接在所述活塞杆10上，并与该活塞杆10同轴心设置的蜗杆14；A worm 14 fixedly connected to the piston rod 10 and coaxially arranged with the piston rod 10;
位置固定并可做旋转运动的蜗轮；Worm gear with fixed position and rotary motion;
用于驱动所述蜗轮做旋转运动的电机18。A motor 18 for driving the worm wheel to rotate.
作为本发明的进一步改进，还设有与所述液压缸6内腔连通的输液管20，该输液管20另一端连接有液体缸22，所述液体缸22通过连接在所述输液管20上的液压泵24向所述液压缸6内输入液体或者由所述液压缸6向所述液压泵24输出液体。As a further improvement of the present invention, an infusion tube 20 communicating with the inner cavity of the hydraulic cylinder 6 is also provided, and the other end of the infusion tube 20 is connected with a liquid cylinder 22, and the liquid cylinder 22 is connected to the infusion tube 20 The hydraulic pump 24 inputs liquid into the hydraulic cylinder 6 or outputs liquid from the hydraulic cylinder 6 to the hydraulic pump 24 .
作为本发明的进一步改进，所述输液管20上还设置有用于控制所述输液管20通断的高压阀26。As a further improvement of the present invention, the infusion tube 20 is also provided with a high-pressure valve 26 for controlling the on-off of the infusion tube 20 .
作为本发明的进一步改进，所述管道2上并联有至少两个测试管道28，每个所述测试管道28上均连通有一个所述待测压力表1。As a further improvement of the present invention, the pipeline 2 is connected in parallel with at least two test pipelines 28 , and each of the test pipelines 28 is connected to a pressure gauge 1 to be tested.
作为本发明的进一步改进，每个所述测试管道28上还设有与其中的所述待测压力表1串联的开关阀30，该开关阀30用于限制或者允许所述测管道2中的液体流入所述待测压力表1中。As a further improvement of the present invention, each of the test pipelines 28 is also provided with a switch valve 30 in series with the pressure gauge 1 to be tested therein, and the switch valve 30 is used to limit or allow the pressure in the test pipeline 2 The liquid flows into the pressure gauge 1 to be tested.
作为本发明的进一步改进，所述管道2中还设有若干与所述测试管道28并联的辅助管道32，该辅助管道32上设置有高压表34或低压表36或相互并联的高压表34与低压表36。As a further improvement of the present invention, the pipeline 2 is also provided with several auxiliary pipelines 32 connected in parallel with the test pipeline 28, and the auxiliary pipeline 32 is provided with a high pressure gauge 34 or a low pressure gauge 36 or a high pressure gauge 34 and a high pressure gauge connected in parallel with each other. Low pressure gauge 36.
作为本发明的进一步改进，As a further improvement of the present invention,
所述辅助管道32上还设有分别用于控制液体流入所述高压表34和低压表36的第一截止阀38和第二截止阀40；The auxiliary pipeline 32 is also provided with a first shut-off valve 38 and a second shut-off valve 40 for controlling liquid flow into the high pressure gauge 34 and the low pressure gauge 36 respectively;
所述所述辅助管道32上还设有分别与所述高压表34和低压表36串联的第一压力传感器42和第二压力传感器44；The auxiliary pipeline 32 is also provided with a first pressure sensor 42 and a second pressure sensor 44 connected in series with the high pressure gauge 34 and the low pressure gauge 36 respectively;
所述第一压力传感器42和第二压力传感器44分别与所述第一截止阀38和第二截止阀40电连接，并规定在所述第一压力传感器42和第二压力传感器44监测到流经其中的液体压力值高于设定的临界值时，控制所述第一截止阀38和第二截止阀40断开；The first pressure sensor 42 and the second pressure sensor 44 are electrically connected to the first shut-off valve 38 and the second shut-off valve 40 respectively, and it is stipulated that when the first pressure sensor 42 and the second pressure sensor 44 monitor the flow When the pressure value of the liquid therein is higher than the set critical value, the first cut-off valve 38 and the second cut-off valve 40 are controlled to be disconnected;
所述临界值分别为所述高压表34和低压表36能够承受的最大压力值。The critical values are respectively the maximum pressure values that the high pressure gauge 34 and the low pressure gauge 36 can bear.
作为本发明的进一步改进，As a further improvement of the present invention,
所述液压缸6的外壁上固定设置有具有空心内腔的壳体46；A housing 46 with a hollow inner cavity is fixedly arranged on the outer wall of the hydraulic cylinder 6;
所述蜗轮转动连接在所述壳体46内，并能接收所述电机18输出扭矩；The worm gear is rotatably connected in the housing 46 and can receive the output torque of the motor 18;
所述蜗杆14设置于所述壳体46内，并能部分伸出于该壳体46与所述活塞杆10连接，所述蜗杆14与所述壳体46间的配合能够限制所述蜗杆14做旋转运动。The worm 14 is arranged in the housing 46, and can partially protrude from the housing 46 to connect with the piston rod 10. The cooperation between the worm 14 and the housing 46 can limit the worm 14. Do a twirling motion.
作为本发明的进一步改进，所述电机18为伺服电机18。As a further improvement of the present invention, the motor 18 is a servo motor 18 .
本发明的具体原理如下：Concrete principle of the present invention is as follows:
(1)电机18驱动蜗轮做旋转运动，该电机18为伺服电机18，可以通过控制脉冲信号来控制电机18转动的速度和加速度，从而达到调速的目的。(1) The motor 18 drives the worm gear to rotate. The motor 18 is a servo motor 18. The speed and acceleration of the motor 18 can be controlled by controlling the pulse signal, so as to achieve the purpose of speed regulation.
(2)蜗轮旋转带动与之传动连接的蜗杆14运动，因为蜗杆14绕其轴线方向的自由度被限制(具体方式可以是在蜗杆14上设置有键槽和键，在壳体46上设置容纳键滑动的滑槽)蜗杆14只能沿着其轴线方向做直线往复运动；(2) The worm wheel rotates to drive the worm 14 that is connected with it to move, because the degree of freedom of the worm 14 around its axis is limited (the specific method can be that a keyway and a key are provided on the worm 14, and an accommodation key is provided on the housing 46. sliding chute) worm 14 can only do linear reciprocating motion along its axis direction;
(3)与蜗杆14固定连接的活塞8在蜗杆14的作用下在液压缸6内做活塞8运动；(3) The piston 8 fixedly connected with the worm screw 14 moves the piston 8 in the hydraulic cylinder 6 under the action of the worm screw 14;
(4)液压缸6内的液体在液压泵24的作用下经过管道2输入至液压缸6内，管道2上设置有高压阀26，一方面能够控制管道2的通、断，另一方面能够防止液体从液压缸6内倒流至液压泵24中；(4) The liquid in the hydraulic cylinder 6 is input into the hydraulic cylinder 6 through the pipeline 2 under the action of the hydraulic pump 24. The pipeline 2 is provided with a high-pressure valve 26, which can control the on-off of the pipeline 2 on the one hand, and on the other hand Prevent the liquid from flowing back into the hydraulic pump 24 from the hydraulic cylinder 6;
(5)活塞8的运动可以和液压缸6内输入液体同时进行，当待输入的液体至达到设定值时，控制高压阀26将管道2截断；(5) The movement of the piston 8 can be carried out simultaneously with the input of the liquid in the hydraulic cylinder 6. When the liquid to be input reaches the set value, the high pressure valve 26 is controlled to cut off the pipeline 2;
(6)活塞8继续运动压缩液压缸6内的液体介质，或者停止运动并且保压，此时位于测试管道28上的待测试压力表处于设定的极限状态，或者保持该极限状态，此时再进行疲劳测试；(6) The piston 8 continues to move and compress the liquid medium in the hydraulic cylinder 6, or stops moving and maintains the pressure. At this time, the pressure gauge to be tested on the test pipeline 28 is in the limit state of setting, or maintains the limit state. Then carry out the fatigue test;
(7)在管道2连接有与测试管道28并联的辅助管道32，辅助管道32上安装有并联设置的高压表34和低压表36，便于操作者能够精确读出辅助管道32上的压力值，因为辅助管道32与测试管道28均连接在管道2中，且液体之间的压缩可以忽略不计，因此其各处在充满油液的状态下，压力相等，因而高压表34和低压表36上的度数即为此时作用在待测试压力表上压力值；(7) pipeline 2 is connected with auxiliary pipeline 32 connected in parallel with test pipeline 28, and auxiliary pipeline 32 is equipped with high pressure gauge 34 and low pressure gauge 36 which are arranged in parallel, so that the operator can accurately read the pressure value on auxiliary pipeline 32, Because the auxiliary pipeline 32 and the test pipeline 28 are all connected in the pipeline 2, and the compression between the liquids is negligible, so the pressures are equal when they are full of oil, so the pressure on the high pressure gauge 34 and the low pressure gauge 36 The degree is the pressure value acting on the pressure gauge to be tested at this time;
(8)在高压表34和低压表36上分别串联第一压力传感器42和第二压力传感器44，该第一压力传感器42和第二压力传感器44分别与向高压表34和低压表36的给油第一截止阀38和第二截止阀40电连接，当辅助管道32中输出的液体压力值高于第一压力传感或者第二压力传感器44设定的临界值时，第一压力传感器42或者第二压力传感器44控制第一截止阀38或者第二截止阀40断开，停止供油。(8) On the high pressure gauge 34 and the low pressure gauge 36, the first pressure sensor 42 and the second pressure sensor 44 are connected in series respectively. The first cut-off valve 38 and the second cut-off valve 40 are electrically connected. When the output liquid pressure value in the auxiliary pipeline 32 is higher than the critical value set by the first pressure sensor or the second pressure sensor 44, the first pressure sensor 42 Or the second pressure sensor 44 controls the opening of the first cut-off valve 38 or the second cut-off valve 40 to stop oil supply.
(9)本发明中的液体介质可以是液压油，防锈液等，依据试验要求可变换各种试验介质；(9) liquid medium among the present invention can be hydraulic oil, antirust liquid etc., can change various test mediums according to test requirement;
(10)上述结构能实现多种波形的试验并且波形可控，即可以根据需要做各种波形的试验，相较于现有技术中的疲劳试验装置来讲，适用面更广。(10) The above-mentioned structure can realize tests of various waveforms and the waveforms are controllable, that is, tests of various waveforms can be performed according to needs, and compared with fatigue test devices in the prior art, it has a wider range of applications.
以上结合具体实施例描述了本发明的技术原理。这些描述只是为了解释本发明的原理，而不能以任何方式解释为对本发明保护范围的限制。基于此处的解释，本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具体实施方式，这些方式都将落入本发明的保护范围之内。The above describes the technical principles of the present invention in conjunction with specific embodiments. These descriptions are only for explaining the principles of the present invention, and cannot be construed as limiting the protection scope of the present invention in any way. Based on the explanations herein, those skilled in the art can think of other specific implementation modes of the present invention without creative efforts, and these modes will all fall within the protection scope of the present invention.
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