Plunger pair testing device

Abstract

The utility model provides a plunger pair testing device which comprises a testing container, a supporting assembly, a driving assembly and a pressure-bearing assembly, and the testing container is provided with an accommodating cavity; the supporting assembly is provided with at least one mounting position, the supporting assembly is arranged in the test container, all the mounting positions extend to the accommodating cavity, and the supporting assembly is provided with an input channel and an output channel in each mounting position area; the driving assembly is mounted on the supporting assembly and provided with an output shaft, at least part of the output shaft is located in the containing cavity and extends to the mounting position, and an intermittent driving wheel is arranged at the tail end of the output shaft; the pressure bearing assembly is arranged outside the containing cavity and communicates with the output connecting end. During testing, after a testing solvent is placed in the containing cavity of the testing container, the intermittent driving wheel on the output shaft of the driving assembly is connected with a plunger rod of a plunger pair to be tested, the testing solvent is continuously pumped to the pressure bearing assembly through the output channel, and whether the testing requirement of the plunger pair is met or not can be judged through the pressure bearing assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pump testing, in particular to a plunger pair test device. Background Art

[0002] Electric hydraulic pumps are widely used in the power industry. For example, electric hydraulic pliers or electric hydraulic cutters both need to be installed with electric hydraulic pumps. However, the pressure performance detection of electric hydraulic pliers and electric hydraulic cutters can only be carried out after assembling a finished product. During the pressure performance test, if any problem occurs, the entire electric hydraulic plier or electric hydraulic cutter needs to be disassembled, resulting in low test efficiency and prolonging the production cycle of new products. Content of the Utility Model

[0003] The purpose of the utility model is to provide a plunger pair test device to solve the technical problem of low efficiency caused by the need to assemble the existing electric hydraulic pump before testing. The preferred technical solutions provided by the utility model can produce many technical effects, which will be elaborated below.

[0004] To achieve the above purpose, a plunger pair test device provided by the utility model includes:

[0005] A test container, which is provided with a receiving cavity;

[0006] A support assembly, which is provided with at least one installation position. The support assembly is arranged on the test container, and all the installation positions extend into the receiving cavity. The support assembly is provided with an input channel and an output channel in each installation position area. One end of the input channel is communicated with the receiving cavity, and the other end is communicated with the installation position. One end of the output channel is communicated with the installation position, and the other end extends to the outside of the receiving cavity and is provided with an output connection end;

[0007] A driving assembly, which is installed on the support assembly. The driving assembly is provided with an output shaft, at least part of the output shaft is located in the receiving cavity and extends into the installation position area, and an intermittent driving wheel is arranged at the end of the output shaft;

[0008] A pressure-bearing assembly, which is arranged outside the receiving cavity and is communicated with the output connection end.

[0009] The plunger pair test device of the present utility model can install the plunger pair to be tested at the installation position of the support assembly. The inlet of the plunger pair is communicated with the input channel, and the outlet of the plunger pair is communicated with the output channel and is in sealing fit. After placing the test solvent in the accommodation cavity of the test container, connect the intermittent drive wheel on the output shaft of the drive assembly to the plunger rod of the plunger pair to be tested. After starting the drive assembly, under the action of the intermittent drive wheel, the plunger pair continuously pumps the test solvent through the output channel to the pressure-bearing assembly, and whether the test requirements of the plunger pair are met can be judged through the pressure-bearing assembly.

[0010] In some embodiments of the plunger pair test device of the present utility model, the support assembly is provided with a first pressure relief pipeline. One end of the first pressure relief pipeline is communicated with the output channel, and the other end of the first pressure relief pipeline is communicated with the accommodation cavity.

[0011] In some embodiments of the plunger pair test device of the present utility model, the plunger pair test device further includes a pressure relief control assembly. The pressure relief control assembly is provided with a second pressure relief pipeline and a solenoid valve. The second pressure relief pipeline is connected in series with the first pressure relief pipeline;

[0012] Wherein, the valve head of the solenoid valve is arranged on the second pressure relief pipeline, and the solenoid valve is used to control the on-off of the second pressure relief pipeline.

[0013] In some embodiments of the plunger pair test device of the present utility model, the pressure relief control assembly is further provided with a pressure regulating rod and a pressure control valve. The pressure control valve is arranged on the second pressure relief pipeline;

[0014] Wherein, the pressure regulating rod is connected to the pressure control valve, and the pressure control valve is used to adjust the pressure-bearing capacity of the pressure control valve.

[0015] In some embodiments of the plunger pair test device of the present utility model, the plunger pair test device further includes an electric control box, a controller, and at least one pressure sensor. The controller is arranged in the electric control box and is electrically connected to the solenoid valve;

[0016] The pressure sensor is arranged on the second pressure relief pipeline and is electrically connected to the controller;

[0017] When the pressure value detected by the pressure sensor is greater than the preset value, the controller controls the solenoid valve to be in the on state; when the pressure value detected by the pressure sensor is less than the preset value, the controller controls the solenoid valve to be in the off state.

[0018] In some embodiments of the plunger pair test device of the present utility model, the plunger pair test device further includes a counting device and a digital display. The counting device and the digital display are arranged in the electric control box;

[0019] Wherein, the counting device is electrically connected to the solenoid valve and is used for recording the number of times the solenoid valve is turned on or off;

[0020] Wherein, the counting device is further provided with a digital display meter, and the digital display meter is used for displaying the number of times the solenoid valve is turned on or off.

[0021] In some embodiments of the plunger pair test device of the present utility model, an emergency stop button is further provided in the electric control box, and the emergency stop button is arranged in the connection circuit of the solenoid valve and is used for manually controlling the on-off of the test circuit of the solenoid valve.

[0022] In some embodiments of the plunger pair test device of the present utility model, the plunger pair test device further includes an alarm device, and the alarm device is arranged in the electric control box and is electrically connected to the pressure sensor.

[0023] In some embodiments of the plunger pair test device of the present utility model, the pressure-bearing assembly includes a pressure gauge, and the input end of the pressure gauge is connected to the output connection end; and / or,

[0024] The pressure-bearing assembly further includes a test oil cylinder, a piston assembly and a pressure-bearing member. The piston assembly is slidably and sealingly connected to the inner cavity of the test oil cylinder. The piston assembly divides the inner cavity of the test oil cylinder into a first part and a second part. A connection port is provided in the first part, and the pressure-bearing member is provided in the second part.

[0025] In some embodiments of the plunger pair test device of the present utility model, the support assembly is provided with a plurality of installation positions, and each installation position is used for installing one plunger pair;

[0026] The intermittent driving wheel is provided with a plurality of driving ends, and the plurality of driving ends correspond to a plurality of plunger pairs in the plurality of installation positions one by one, and each driving end is connected to the driving rod of each plunger pair.

[0027] In some embodiments of the plunger pair test device of the present utility model, the support assembly includes a support frame and the connecting plate. The connecting plate is connected to the support frame, and all the installation positions are arranged on the support frame;

[0028] The connecting plate is installed at the opening position of the test container, and the support frame extends into the accommodating cavity.

[0029] In some embodiments of the plunger pair test device of the present utility model, at least one pressing rod is provided on the support frame. One end of the pressing rod abuts against the plunger pair, and the pressing rod is threadedly connected to the support frame.

[0030] In some embodiments of the plunger pair test device of the present utility model, the driving assembly is installed on the connecting plate, and the output shaft passes through the connecting plate and extends into the accommodating cavity.

[0031] In some embodiments of the plunger pair test device of the present utility model, the connecting plate is connected to the opening of the test container in a sealed manner; and / or, the outlet of the plunger pair is connected to the output channel in a sealed manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0033] Figure 1 is a schematic structural diagram of the plunger pair test device according to an embodiment of the present utility model;

[0034] Figure 2 is Figure 1 the A-A cross-sectional view of;

[0035] Figure 3 is Figure 1 the B-B cross-sectional view of;

[0036] Figure 4 is a schematic structural diagram of the plunger pair test device according to another embodiment of the present utility model;

[0037] Figure 5 is a schematic structural diagram of the support assembly of the plunger pair test device according to an embodiment of the present utility model;

[0038] Figure 6 is a schematic structural diagram of the support assembly of the plunger pair test device according to an embodiment of the present utility model from another perspective;

[0039] Figure 7 is a schematic structural diagram of the electric control box of the plunger pair test device according to an embodiment of the present utility model.

[0040] REFERENCE NUMERALS

[0041] 100, plunger pair test device;

[0042] 110, test container; 111, accommodating cavity;

[0043] 120, support assembly; 121, support frame; 1211, pressing rod; 122, connecting plate; 123, installation position; 124, input channel; 125, output channel; 1251, output connection end; 126, first pressure relief pipeline;

[0044] 130. Driving component; 131. Output shaft; 132. Intermittent driving wheel;

[0045] 140. Pressure-bearing component; 141. Test oil cylinder; 1411. First part; 1412. Second part; 142. Piston assembly; 143. Pressure-bearing member;

[0046] 150. Pressure relief control component; 151. Second pressure relief pipeline; 152. Solenoid valve;

[0047] 160. Electric control box; 161. Counting device; 162. Digital display meter; 163. Emergency stop button;

[0048] 200. Plunger pair; 210. Driving rod. Detailed implementation manners

[0049] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0050] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless otherwise clearly indicated in the context, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "include", "comprise", "contain", and "have" are inclusive and thus specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0051] Although terms such as first, second, and third may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another region, layer, or section. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply an order or sequence when used herein. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0052] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figure to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the exemplary term "below" can include both the upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are interpreted accordingly.

[0053] The plunger pair test device provided by the present utility model can independently test the plunger pair, and has the advantages of high efficiency and convenience, so that there is no need to conduct tests after the plunger pair is installed on a plunger pump, an electric hydraulic clamp, or an electric hydraulic cutter.

[0054] Installing the plunger pair on an electric hydraulic clamp or an electric hydraulic cutter and then conducting tests will cause the following problems:

[0055] When there is any problem with the electric hydraulic clamp or the electric hydraulic cutter, such as unstable pressure rise, slow pressure rise process, or inability to reach the preset pressure value, it is necessary to disassemble the entire electric hydraulic clamp or the electric hydraulic cutter to check the plunger pair. Among them, this finished device at least includes important components such as a housing, a motor, an electric control part, an oil tank or an oil bladder, a high-pressure oil pipe, and a clamp body. When disassembling and assembling these components multiple times, a large amount of time is wasted, the detection efficiency is reduced, and the production cycle of the entire product is prolonged. Therefore, the current existing detection methods cannot meet the production needs.

[0056] For the plunger pair test device of the present utility model, in view of the above problems, a test device that can be efficient and convenient is provided, which specifically includes a test container, a support assembly, a drive assembly, and a pressure-bearing assembly. Among them, the test container is used to hold test solvents, including reagents such as hydraulic oil. The support assembly is installed on the test container. During the test, the plunger pair is installed at the installation position of the support assembly, and the plunger pair is placed in the test solvent in the test container. By using the support assembly and the pressure-bearing assembly, it can be determined whether the plunger pair can meet the design requirements during the test.

[0057] The plunger pair test device of the present utility model will be described in detail below with reference to the accompanying drawings. It should be noted that the drawings and embodiments are only used to explain the plunger pair of the present utility model and should not be construed as a limitation to the present utility model.

[0058] Figure 1 FIG. is a schematic structural diagram of the plunger pair test device according to an embodiment of the present utility model. Figure 2 is Figure 1 A-A sectional view of Figure 3 is Figure 1 B-B sectional view of Figure 1 , Figure 2 and Figure 3 As shown in

[0059] During the test, sufficient test solvent such as hydraulic oil is injected into the accommodation cavity 111 of the test container 110. The liquid level height of the test solvent is at least above the installation position of the support assembly 120. That is, during the entire test process, all the installation positions in the support assembly 120 and the plunger pair 200 at the installation positions are completely surrounded by the test solvent.

[0060] The drive assembly 130 on the support assembly 120 drives the plunger pair 200 to reciprocate through the intermittent drive wheel 132 at the end of the output shaft 131. During the reciprocating movement of the plunger pair 200, the test solvent in the accommodation cavity 111 enters the inlet of the plunger pair 200 through the input channel 124, and flows through the outlet of the plunger pair 200 to the output channel 125, and finally enters the pressure-bearing assembly 140. The operator determines the working condition of the plunger pair 200 through the pressure-bearing assembly 140, and then judges whether the plunger pair 200 can meet the working requirements.

[0061] A completed technical solution of the present utility model is as follows: The test container 110 of the plunger pair test device 100 is provided with a receiving cavity 111; the support assembly 120 of the plunger pair test device 100 is provided with at least one mounting position 123, the support assembly 120 is arranged on the test container 110, and all the mounting positions 123 extend into the receiving cavity 111. The support assembly 120 is provided with an input channel 124 and an output channel 125 in the area of each mounting position 123. One end of the input channel 124 is communicated with the receiving cavity 111, and the other end is communicated with the mounting position 123. One end of the output channel 125 is communicated with the mounting position 123, and the other end extends to the outside of the receiving cavity 111 and is provided with an output connection end 1251; the driving assembly 130 of the plunger pair test device 100 is installed on the support assembly 120, the driving assembly 130 is provided with an output shaft 131, at least part of the output shaft 131 is located in the receiving cavity 111 and extends into the mounting position 123, and an intermittent driving wheel 132 is arranged at the end of the output shaft 131; the pressure-bearing assembly 140 of the plunger pair test device 100 is arranged outside the receiving cavity 111 and is communicated with the output connection end 1251.

[0062] In an embodiment of the plunger pair test device of the present utility model, the support assembly 120 is provided with a first pressure relief pipeline 126. One end of the first pressure relief pipeline 126 is communicated with the output channel 125, and the other end is communicated with the receiving cavity 111. In the plunger pair test device 100 of this embodiment, the pressure loaded by the plunger pair 200 can be relieved through the first pressure relief pipeline 126, and the test solvent can be returned to the receiving cavity 111 of the test container 110 for reuse.

[0063] In this embodiment, by setting the first pressure relief pipeline 126, the plunger pair 200 that can be installed on the support assembly 120 can be depressurized and pressurized multiple times. The upper pressure condition of the plunger pair 200 can be tested through multiple pressurizations and depressurizations, and whether the plunger pair 200 can meet the pressure holding time can be detected through the pressurization and depressurization processes in each cycle.

[0064] In an embodiment of the present utility model, the plunger pair test device 100 further includes a pressure relief control assembly 150. The pressure relief control assembly 150 is provided with a second pressure relief pipeline 151 and an electromagnetic valve 152. The second pressure relief pipeline 151 is connected in series with the first pressure relief pipeline 126; wherein, the valve head of the electromagnetic valve 152 is arranged on the second pressure relief pipeline 151, and the electromagnetic valve 152 is used to control the on-off of the second pressure relief pipeline 151. In the plunger pair test device 100 of this embodiment, the electromagnetic valve 152 is used to control the connection and disconnection of the first pressure relief pipeline 126 and the second pressure relief pipeline 151 with the receiving cavity 111.

[0065] Among them, by controlling the solenoid valve 152, the pressure holding time of the plunger pair 200 can also be detected. In addition, by using the pressure relief control component 150, the pressurization and pressure relief of the plunger pair 200 can be remotely controlled several times, so as to detect the operating condition of the plunger pair 200.

[0066] In an embodiment of the plunger pair test device of the present utility model, the pressure relief control component 150 is further provided with a pressure adjusting rod and a pressure control valve. The pressure control valve is arranged in the second pressure relief pipeline. Among them, the pressure adjusting rod is connected to the pressure control valve, and the pressure control valve is used to adjust the pressure of the pressure control valve. The plunger pair test device 100 in this embodiment can manually control the test process of the plunger pair 200. When emergency pressure relief or pressure adjustment is required, the pressure control valve is operated to drive the pressure control valve, so as to control the test pressure within the required pressure range.

[0067] The pressure adjusting rod and the pressure control valve in this embodiment can also relieve pressure at any moment during the entire test process of the plunger pair 200 in case of emergency, preventing damage to the test device or operators caused by excessive pressure.

[0068] In an embodiment of the present utility model, the plunger pair test device 100 further includes an electric control box 160, a controller, and at least one pressure sensor. The controller is arranged in the electric control box and is electrically connected to the solenoid valve 152. The pressure sensor is arranged in the second pressure relief pipeline 151 and is electrically connected to the controller. When the pressure value detected by the pressure sensor is greater than the preset value, the controller controls the solenoid valve 152 to be in the on state. When the pressure value detected by the pressure sensor is less than the preset value, the controller controls the solenoid valve 152 to be in the off state.

[0069] The plunger pair test device in this embodiment can realize the automatic control of the test process. During the test, first set the required pressure value for the test, that is, the preset value. When the pressure value in the pressure bearing component 140 is higher than the preset value, the solenoid valve 152 in the second pressure relief pipeline 151 is closed, and the second pressure relief pipeline 151 is in a disconnected state. The test solvent cannot return to the accommodation cavity 111 through the second pressure relief pipeline 151. When the pressure value in the pressure bearing component 140 is higher than the preset value, the solenoid valve 152 in the second pressure relief pipeline 151 is opened, and the second pressure relief pipeline 151 is in a connected state. The test solvent enters the accommodation cavity 111 through the second pressure relief pipeline 151. This process is automatically controlled by the controller, meeting the need for automatic testing of the plunger pair 200.

[0070] Figure 7 It is a schematic structural diagram of the electric control box of the plunger pair test device according to the embodiment of the present utility model, as Figure 7As shown, in an embodiment of the present utility model, the plunger pair test device 100 further includes a counting device 161 and a digital display 162. The counting device 161 and the digital display 162 are arranged inside the electric control box 160. Among them, the counting device 161 is electrically connected to the solenoid valve 152 and is used to record the number of times the solenoid valve 152 is turned on or off. Among them, the counting device 161 is also provided with a digital display 162, and the digital display 162 is used to display the number of times the solenoid valve 152 is turned on or off.

[0071] In the plunger pair test device of this embodiment, by setting the counting device 161 and the digital display 162, the operator can intuitively see the number of times of pressurization and depressurization of the plunger pair 200 on the electric control box 160, and use a limited number of pressurization and depressurization cycles to determine whether the plunger pair 200 meets the test requirements.

[0072] In an embodiment of the present utility model, an emergency stop button 163 is further arranged inside the electric control box 160. The emergency stop button 163 is arranged in the connection circuit of the solenoid valve 152 and is used to manually control the on-off of the test circuit of the solenoid valve 152. In the plunger pair test device 100 of this embodiment, at any moment during the test process, the test process is controlled by the emergency stop button 163. Specifically, the on-off of the second pressure relief pipeline 151 is controlled by the solenoid valve 152 to block the test of the plunger pair 200. In this embodiment, the safety condition during the test process can also be emergently controlled.

[0073] In an embodiment of the present utility model, the plunger pair test device 100 further includes an alarm device. The alarm device is arranged inside the electric control box 160 and is electrically connected to the pressure sensor. In the plunger pair test device 100 of this embodiment, by setting the alarm device to remind the operator of the pressure condition during the test process. The alarm device is electrically connected to the pressure sensor. When the pressure sensor detects that the pressure is too high, the alarm device is started. Specifically, the alarm device can give a warning signal to the operator through the change of the intensity of sound or light, so that the operator can discover the problem in time and solve the problem in time.

[0074] In an embodiment of the present utility model, the pressure-bearing assembly 140 includes a pressure gauge. The input end of the pressure gauge is connected to the output connection end 1251. Through the pressure gauge, the pressure value in the output channel 125 can be intuitively seen, and then the pressurization condition and the pressure-holding condition of the plunger pair 200 can be intuitively seen, and it can be accurately judged whether the plunger pair 200 meets the working requirements.

[0075] In an embodiment of the present utility model, the pressure-bearing assembly 140 further includes a test oil cylinder 141, a piston assembly 142, and a pressure-bearing member 143. The piston assembly 142 is slidably and sealingly connected to the inner cavity of the test oil cylinder 141. The piston assembly 142 divides the inner cavity of the test oil cylinder 141 into a first part 1411 and a second part 1412. A connection port is provided in the first part 1411, and the pressure-bearing member 143 is provided in the second part 1412. In this embodiment, the connection port of the first part 1411 of the test oil cylinder 141 is communicated with the output connection end 1251 of the output channel 125. The pressurization condition of the plunger pair 200 is judged by the position of the piston assembly 142 in the test oil cylinder 141. After the test is completed, the pressure-bearing member 143 in the second part 1412 of the test oil cylinder 141 can drive the piston assembly 142 to return to the initial position. The pressure-bearing member 143 can be set as an elastic member such as a spring. One end of the elastic member is connected to the piston assembly 142, and the other end of the elastic member is connected to the inner wall of the second part 1412 of the test oil cylinder 141.

[0076] A detection mark can also be provided on the outer wall of the test oil cylinder 141 to facilitate identifying the pressure magnitude in the test oil cylinder 141, thereby reflecting the pressurization condition of the plunger pair 200.

[0077] Figure 4 It is a structural schematic diagram of a plunger pair test device according to another embodiment of the present utility model. Figure 5 It is a structural schematic diagram of a support assembly of a plunger pair test device according to an embodiment of the present utility model. Figure 6 It is a structural schematic diagram of the support assembly of the plunger pair test device according to the embodiment of the present utility model from another perspective, as Figure 4 、 Figure 5 and Figure 6 shown. In an embodiment of the present utility model, the support assembly 120 is provided with a plurality of installation positions 123, and each installation position 123 is used to install one of the plunger pairs 200; the intermittent drive wheel 132 is provided with a plurality of drive ends, and the plurality of drive ends correspond to the plurality of plunger pairs 200 in the plurality of installation positions 123 one by one, and each drive end is connected to the drive rod 210 of each plunger pair 200.

[0078] The plunger pair test device in this embodiment can simultaneously test a plurality of plunger pairs 200 to meet the test requirements for a large number of plunger pairs 200. In each test process, two plunger pairs 200 can be set in the support assembly 120, or four plunger pairs 200 can be set in the support assembly 120.

[0079] In an embodiment of the present utility model, the support assembly 120 includes a support frame 121 and the connecting plate 122. The connecting plate 122 is connected to the support frame 121, and all the mounting positions 123 are provided on the support frame 121. The connecting plate 122 is installed at the opening position of the test container 110, and the support frame 121 extends into the accommodation cavity 111. In this embodiment, the specific structural form of the support assembly 120 is given. The connecting plate 122 is arranged at the opening position of the test container 110, and the support frame 121 is placed inside the accommodation cavity 111 of the test container 110. Among them, the connecting plate 122 and the opening position of the test container 110 can be connected in a sealed manner to prevent the test solvent in the accommodation cavity 111 from overflowing and reduce the pollution of the test solvent to the external environment.

[0080] In an embodiment of the present utility model, at least one pressing rod 1211 is provided on the support frame 121. One end of the pressing rod 1211 abuts against the plunger pair 200, and the pressing rod 1211 is threadedly connected to the support frame 121. In this embodiment, the plunger pair 200 is fixed to the mounting position 123 area of the support frame 121 by the pressing rod 1211, and the pressing rod 1211 is threadedly connected to the support frame 121, which is convenient for loosening the pressing rod 1211 and disassembling the plunger pair 200 from the support frame 121.

[0081] In an embodiment of the present utility model, the driving assembly 130 is installed on the connecting plate 122, and the output shaft 131 passes through the connecting plate 122 and extends into the accommodation cavity 111. In this embodiment, the driving assembly 130 and the plunger pair 200 are fixedly connected to the support frame 121. Such an arrangement can place more loads on the support frame 121, reduce the bearing pressure on other components, and all the plunger pairs 200 and the driving assembly 130 can be installed on the support frame 121 before the test, and then the support frame 121 can be installed in the test container 110.

[0082] In an embodiment of the present utility model, the connecting plate 122 of the support frame 121 is connected to the opening of the test container 110 in a sealed manner; the outlet of the plunger pair 200 and the output channel 125 can also be connected in a sealed manner, so as to make the test process more accurate and reduce the influence of pressure relief in some areas on the test conditions.

[0083] The plunger pair test device 100 of the present utility model can test the plunger pair 200 alone and reduce the multiple disassembly of the entire electro-hydraulic pump; if it is detected that the pressure build-up of the plunger pair 200 is unstable or the pressure drops during the pressure build-up, there is no need to disassemble the mechanical part to replace the plunger pair 200 and then assemble it again for testing. Therefore, the plunger pair test device 100 provided by the present utility model has a high detection efficiency and has the advantage of reducing the disassembly of the electro-hydraulic pump.

[0084] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A plunger pair testing device, characterized in that: The plunger pair testing device comprises: A test container, wherein the test container is provided with a containing cavity; A support assembly, wherein the support assembly is provided with at least one mounting position, the support assembly is provided on the test container, and all the mounting positions extend to the accommodating cavity, the support assembly is provided with an input channel and an output channel in each mounting position area, one end of the input channel is connected to the accommodating cavity, and the other end is connected to the mounting position, one end of the output channel is connected to the mounting position, and the other end extends to the outside of the accommodating cavity, and is provided with an output connection end; A driving assembly, the driving assembly is mounted on the supporting assembly, the driving assembly is provided with an output shaft, at least a portion of the output shaft is located in the accommodating cavity and extends to the mounting area, and an intermittent driving wheel is provided at the end of the output shaft; A pressure-bearing component is arranged outside the accommodating cavity and is connected to the output connection end.

2. The plunger pair testing device according to claim 1, characterized in that: The support assembly is provided with a first pressure relief pipe, one end of the first pressure relief pipe is connected to the output channel, and the other end of the first pressure relief pipe is connected to the accommodating chamber.

3. The plunger pair testing device according to claim 2, characterized in that: The plunger auxiliary test device further comprises a pressure relief control assembly, wherein the pressure relief control assembly is provided with a second pressure relief pipeline and a solenoid valve, wherein the second pressure relief pipeline is connected in series with the first pressure relief pipeline; Wherein, the valve head of the solenoid valve is arranged on the second pressure relief pipeline, and the solenoid valve is used to control the opening and closing of the second pressure relief pipeline.

4. The plunger pair testing device according to claim 3, characterized in that: The pressure relief control assembly is further provided with a pressure regulating rod and a pressure control valve, and the pressure control valve is provided on the second pressure relief pipeline; Wherein, the pressure regulating rod is connected to the pressure control valve, and the pressure control valve is used to adjust the pressure bearing size of the pressure control valve.

5. The plunger pair testing device according to claim 3, characterized in that: The plunger pair test device also includes an electric control box, a controller, and at least one pressure sensor, wherein the controller is disposed in the electric control box and is electrically connected to the solenoid valve; The pressure sensor is arranged on the second pressure relief pipe and is electrically connected to the controller; When the pressure value detected by the pressure sensor is greater than a preset value, the controller controls the solenoid valve to be in an on state; when the pressure value detected by the pressure sensor is less than the preset value, the controller controls the solenoid valve to be in a closed state.

6. The plunger pair testing device according to claim 5, characterized in that: The plunger pair test device also includes a counting device and a digital display, and the counting device and the digital display are arranged in the electric control box; Wherein, the counting device is electrically connected to the solenoid valve and is used to record the number of times the solenoid valve is connected or disconnected; Wherein, the counting device is also provided with a digital display, and the digital display is used to display the number of times the solenoid valve is connected or disconnected.

7. The plunger pair testing device according to claim 5, characterized in that: An emergency stop button is also provided in the electric control box. The emergency stop button is provided in the connection circuit of the solenoid valve and is used to manually control the on and off of the test circuit of the solenoid valve.

8. The plunger pair testing device according to claim 5, characterized in that: The plunger pair test device also includes an alarm device, which is arranged in the electric control box and is electrically connected to the pressure sensor.

9. The plunger pair testing device according to claim 1, characterized in that: The pressure-bearing component includes a pressure gauge, the input end of the pressure gauge is connected to the output connection end; and / or, The pressure-bearing assembly also includes a test cylinder, a piston assembly and a pressure-bearing part. The piston assembly is slidably and sealingly connected to the inner cavity of the test cylinder. The piston assembly divides the inner cavity of the test cylinder into a first part and a second part, wherein the first part is provided with a connecting port, and the second part is provided with the pressure-bearing part.

10. The plunger pair testing device according to any one of claims 1 to 9, characterized in that: The support assembly is provided with a plurality of mounting positions, each of which is used to mount one of the plunger pairs; The intermittent driving wheel is provided with a plurality of driving ends, and the plurality of driving ends correspond one by one to the plurality of plunger pairs in the plurality of mounting positions, and each of the driving ends is connected to a driving rod of each of the plunger pairs.

11. The plunger pair testing device according to claim 10, characterized in that: The support assembly includes a support frame and a connecting plate, the connecting plate is connected to the support frame, and all the mounting positions are arranged on the support frame; The connecting plate is installed at the opening position of the test container, and the supporting frame extends to the accommodating cavity.

12. The plunger pair testing device according to claim 11, characterized in that: At least one pressing rod is arranged on the support frame, one end of the pressing rod abuts against the plunger pair, and the pressing rod is connected to the support frame by a thread.

13. The plunger pair testing device according to claim 11, characterized in that: The driving assembly is mounted on the connecting plate, and the output shaft passes through the connecting plate and extends to the accommodating cavity.

14. The plunger pair testing device according to claim 11, characterized in that: The connecting plate is connected to the opening of the test container in a sealed manner; and / or, The outlet of the plunger pair is connected to the output channel in a sealed manner.

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