A transformer insulating oil chromatographic analysis test sampling auxiliary device and method

Abstract

The invention provides a transformer insulating oil chromatographic analysis test sampling auxiliary device and method, the device comprises a shell and a syringe component module; the syringe component module is arranged outside the shell and at the upper part of the sampling port; the syringe component module comprises a syringe fixing part, a syringe body, a needle and a syringe piston; a needle pushing control mechanism is arranged on the syringe piston, the syringe body is arranged on the syringe fixing part, and a connecting shaft is arranged on the syringe fixing part; the connecting shaft is perpendicular to the syringe and passes through the shell; one end of the connecting shaft is arranged on the syringe fixing part, and the other end is arranged in the shell; a controller is also arranged in the shell, the controller is connected to a power module and a relay module, the relay module is connected to a needle plugging and pulling control mechanism and a syringe body rotation control mechanism, and the relay module is also connected to the needle pushing control mechanism and the power module; the needle plugging and pulling control mechanism and the syringe body rotation control mechanism are both connected to the connecting shaft.

Description

Technical Field

[0001] The invention belongs to the field of transformer insulating oil chromatographic analysis test, and in particular relates to a transformer insulating oil chromatographic analysis test sampling auxiliary device and method. Background Art

[0002] GB / T 7252-2001 Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil stipulates that the analysis results of multiple injections of the same gas should be within ±1.5% of its average value (i.e., repeatability should be within ±1.5%). In the analysis test of dissolved gases in transformer oil, the injection process is a key step. The injection volume, injection time, and injection device will all affect the analysis data.

[0003] The traditional method of sample injection in the laboratory is to insert a syringe into the injection port to complete the injection. In the actual operation process, due to the small diameter of the injection port and the differences in the operation of operators, the following problems often occur, which affect the consistency of injection repeatability: 1. The syringe and the sealing gasket are not perpendicular, which damages the needle and the injection fails; 2. The carrier gas pressure in the injection port is high, causing the carrier gas to be pressed into the syringe, and even if the amount is very small, it is necessary to re-sample and inject. Injection failure will not only waste the equilibrium gas obtained by oscillation, requiring the experiment to be repeated, which is a great waste of time, but also may damage the injection needle.

[0004] This is a shortcoming of the prior art. Therefore, in view of the above-mentioned defects in the prior art, it is very necessary to provide a transformer insulating oil chromatographic analysis test sampling auxiliary device and method. Summary of the invention

[0005] The purpose of the present invention is to provide a transformer insulating oil chromatographic analysis test sampling auxiliary device and method to solve the above technical problems in view of the defect that problems occur in the actual sampling operation leading to sampling failure.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A transformer insulating oil chromatographic analysis test sampling auxiliary device, comprising a housing and a syringe assembly module;

[0008] The syringe assembly module is arranged outside the housing and above the injection port;

[0009] The syringe assembly module includes a syringe holder and a syringe;

[0010] The syringe includes a syringe body, a needle and a syringe piston;

[0011] A needle pushing control mechanism is arranged on the syringe piston, the syringe body is arranged on the syringe fixing part, and a connecting shaft is arranged on the syringe fixing part;

[0012] The connecting shaft is perpendicular to the syringe and penetrates the shell;

[0013] One end of the connecting shaft is arranged on the syringe fixing part, and the other end is arranged inside the shell;

[0014] A controller is also provided inside the housing, the controller is connected to a power module and a relay module, the relay module is connected to a needle insertion and extraction control mechanism and a syringe body rotation control mechanism, and the relay module is also connected to a needle push control mechanism and a power module;

[0015] The needle insertion and extraction control mechanism and the syringe body rotation control mechanism are both connected to the connecting shaft.

[0016] Furthermore, the relay module includes a first relay, a second relay and a third relay, the controller is connected to the first relay, the second relay and the third relay respectively, the power supply module is connected to the first relay, the second relay and the third relay respectively, the first relay is connected to the needle pushing control mechanism, the second relay is connected to the needle insertion and extraction control mechanism, and the third relay is connected to the syringe body rotation control mechanism.

[0017] Further, the housing includes a top surface, a bottom surface, a front surface, a rear surface, a first side surface, and a second side surface;

[0018] The syringe assembly module is disposed outside the second side;

[0019] The syringe fixing part comprises an upper panel, a middle panel and a lower panel, wherein the middle parts of the upper panel, the middle panel and the lower panel are all provided with grooves;

[0020] The needle of the syringe is arranged at the lower part of the syringe body, the syringe body passes through the groove of the lower panel and is fixed to the lower panel, the lower end of the syringe piston is arranged inside the syringe body, and the upper end of the syringe piston is arranged in the groove of the middle panel;

[0021] The push needle control mechanism includes a first cylinder, which includes a first cylinder body and a first piston rod. The first cylinder body is arranged on the upper part of the upper panel, the first piston rod passes through the upper panel, one end of the first piston rod is arranged inside the first cylinder body, and the other end of the first piston rod is arranged on the upper part of the middle panel;

[0022] The connecting shaft is arranged on the lower panel, the connecting shaft is parallel to the bottom surface of the shell and perpendicular to the second side surface, and the connecting shaft passes through the second side surface.

[0023] Furthermore, the shell is made of cold-rolled silicon steel, and the outer surface of each side of the shell is provided with a sprayed plastic layer. The shell integrates various components of the fixing device.

[0024] Further, the syringe fixing member is in the shape of a Chinese character 'Ri' and further includes a first vertical plate and a second vertical plate on both sides. The middle panel is in the shape of a 'U' with the opening facing downwards, and both side surfaces of the middle panel slide along the first vertical plate and the second vertical plate on both sides of the syringe fixing member respectively.

[0025] Further, the needle inserting and extracting control mechanism includes a second air cylinder and a connecting rotating shaft sleeve;

[0026] The second air cylinder includes a second cylinder body and a second piston rod. One end of the second piston rod is arranged inside the second cylinder body, and a push handle perpendicular to the second piston rod is arranged at the other end of the second piston rod;

[0027] The second cylinder body is arranged inside the second side surface and is parallel to the second side surface. The connecting rotating shaft sleeve is arranged at the lower part of the push handle, and the connecting rotating shaft penetrates through the connecting rotating shaft sleeve.

[0028] Further, the syringe body rotation control mechanism includes a third air cylinder and a third air cylinder support plate;

[0029] The third air cylinder support plate is arranged on the connecting rotating shaft sleeve. The third air cylinder support plate is parallel to the second side surface, and the third air cylinder is arranged on the third air cylinder support plate;

[0030] The third air cylinder includes a third cylinder body and a third piston rod. The third cylinder body is fixed on the third air cylinder support plate. One end of the third piston rod is arranged inside the third cylinder body, and a connecting plate is arranged at the other end of the third piston rod. A crank is arranged on the connecting plate. The crank is connected to the connecting rotating shaft and is parallel to the second side surface. The controller controls the switch of the third relay, thereby controlling the up and down movement of the third piston rod, further driving the up and down movement of the connecting plate. The connecting plate drives the crank to rotate, the crank drives the connecting rotating shaft to rotate, and the syringe fixing member rotates, realizing the conversion between the vertical state and the horizontal sampling state of the syringe.

[0031] Further, a limit bolt is also arranged on the third air cylinder support plate, and a limit structure cooperating with the limit bolt is arranged on the crank. The limit bolt limits the rotation stroke of the crank, thereby ensuring sampling of the syringe in the horizontal state.

[0032] Further, the first relay adopts a two-position five-way solenoid valve. The first relay includes a first pilot coil, a first air outlet hole of the first relay, a second air outlet hole of the first relay, and an air inlet hole of the first relay;

[0033] The first air cylinder adopts a double-acting air cylinder and further includes a first working hole of the first air cylinder and a second working hole of the first air cylinder;

[0034] The first pilot coil is connected to the controller. The first air outlet hole of the first relay is connected to the first working hole of the first air cylinder. The second air outlet hole of the first relay is connected to the second working hole of the first air cylinder. The air inlet hole of the first relay is connected to an air source;

[0035] The second relay adopts a two-position five-way solenoid valve, and the second relay includes a second pilot coil, a first air outlet of the second relay, a second air outlet of the second relay, and an air inlet of the second relay;

[0036] The second cylinder is a double-acting cylinder, and also includes a first working hole of the second cylinder and a second working hole of the second cylinder;

[0037] The second pilot coil is connected to the controller, the first air outlet of the second relay is connected to the first working hole of the second cylinder, the second air outlet of the second relay is connected to the second working hole of the second cylinder, and the air inlet of the second relay is connected to the air source;

[0038] The third relay adopts a two-position five-way solenoid valve, and the third relay includes a third pilot coil, a first air outlet of the third relay, a second air outlet of the third relay and an air inlet of the third relay;

[0039] The third cylinder is a double-acting cylinder, and also includes a first working hole of the third cylinder and a second working hole of the third cylinder;

[0040] The third pilot coil is connected to the controller, the first air outlet of the third relay is connected to the first working hole of the third cylinder, the second air outlet of the third relay is connected to the second working hole of the third cylinder, and the air inlet of the third relay is connected to the air source;

[0041] The first relay, the second relay and the third relay are arranged on the bottom surface of the shell. The opening and closing actions of the double-acting cylinder are driven by the air source; the two-position five-way solenoid valve has two working holes, and the controller controls one working hole to connect the cylinder to realize the opening action, and the other working hole to connect the cylinder to realize the closing action, thereby ensuring the accuracy and time of the syringe assembly module rotation, needle insertion and removal, and needle pushing actions.

[0042] Furthermore, the air source adopts a centrifugal air compressor.

[0043] Furthermore, the shell also includes a slope, which connects the top surface and the front surface, and the slope also connects the first side surface and the second side surface, and the angle between the slope and the bottom surface is less than 90 degrees.

[0044] Furthermore, a control panel is provided on the front or inclined surface of the housing, and a power button, a working mode button and a working step button are provided on the control panel, and the power button, the working mode button and the working step button are all connected to the controller;

[0045] The working mode buttons include a single-step mode button and an automatic mode button;

[0046] The working step buttons include a first step button, a second step button, a third step button, a fourth step button, a fifth step button and a sixth step button;

[0047] The controller is arranged on the control panel;

[0048] The power module is arranged on a power board, and the power board is arranged inside the front of the housing.

[0049] During operation, the working mode is selected through the working mode button. There is no need for the human body to touch the syringe assembly module. If the automatic mode button is selected, the device will automatically perform six steps: sampling - preparing for injection - inserting the needle - pushing the needle - removing the needle - restoring the initial state. If the single-step working mode is selected, the specific operation steps need to be selected to perform the above six steps separately.

[0050] Furthermore, the power module includes a switching power unit; the switching power unit realizes voltage-current conversion from 12V1A to 5V2A.

[0051] Furthermore, the first cylinder adopts a mini cylinder with a model number of CD12816-20;

[0052] The second cylinder uses a double-axis cylinder model TN16-60;

[0053] The third cylinder uses a mini cylinder model MAL16-50;

[0054] The first relay, the second relay and the third relay all use a 4V110-06-12V two-position five-way solenoid valve. The selection of the cylinder and relay models ensures that the pinhole injection deviation is less than 5 degrees, and the time for inserting the needle-pushing the needle-pulling the needle is less than 1S.

[0055] Furthermore, a buffer rubber is arranged between the first piston rod and the middle panel, and the buffer rubber is used to buffer the impact force of the first cylinder and avoid the direct force of the cylinder.

[0056] The present invention also provides the following technical solution:

[0057] A transformer insulating oil chromatographic analysis test sampling auxiliary method based on the above device comprises the following steps:

[0058] Step S1. The controller controls the working state of the syringe assembly module according to the selected working mode;

[0059] Step S2. When the real-time working mode is a single-step working mode, the controller controls the working state of the syringe assembly module according to the selected working step;

[0060] Step S21. When the real-time working step is the first step, proceed to step S4;

[0061] Step S22. When the real-time working step is the second step, proceed to step S5;

[0062] Step S23. When the real-time working step is the third step, proceed to step S6;

[0063] Step S24. When the real-time working step is the fourth step, proceed to step S7;

[0064] Step S25. When the real-time working step is the fifth step, proceed to step S8;

[0065] Step S26. When the real-time working step is the sixth step, proceed to step S9;

[0066] Step S3. When the real-time working mode is the automatic working mode, proceed to step S4;

[0067] Step S4. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is parallel to the bottom surface;

[0068] The controller sends a signal to the needle push control mechanism, which drives the syringe piston to move horizontally, and the syringe completes sampling;

[0069] Determine the real-time working mode;

[0070] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0071] Step S5. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is perpendicular to the bottom surface, ready for injection;

[0072] Determine the real-time working mode;

[0073] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0074] Step S6. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move downward, so that the syringe needle is inserted into the injection port, completing the needle insertion;

[0075] Determine the real-time working mode;

[0076] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0077] Step S7. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move downward to complete the gas injection;

[0078] Determine the real-time working mode;

[0079] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0080] Step S8. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move upward to separate the syringe needle from the injection port and complete the needle extraction;

[0081] Determine the real-time working mode;

[0082] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0083] Step S9. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move upward to restore the original state;

[0084] Return to step S1.

[0085] The beneficial effects of the present invention are:

[0086] The present invention makes the sampling process of transformer insulating oil chromatography analysis simple and orderly, reduces the number of manual operations of test personnel, has higher test accuracy, and greatly improves the repeatability of chromatographic analysis test sampling results; at the same time, it saves labor costs and time, reduces the probability of damage to the test syringe, and reduces material costs.

[0087] In addition, the invention has a reliable design principle, a simple structure and a very broad application prospect.

[0088] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] Figure 1 It is the principle diagram of the present invention;

[0090] Figure 2 The principle of the present invention Figure 2 ;

[0091] Figure 3 A view of a second side of the present invention;

[0092] Figure 4 This is a schematic diagram of the external structure of the housing of the present invention;

[0093] Figure 5 It is a schematic diagram of the cross section along the connecting shaft of the present invention;

[0094] Figure 6 It is a structural schematic diagram of the present invention along the cross section of the connecting shaft;

[0095] Figure 7 This is a schematic diagram of the internal structure of the housing of the present invention;

[0096] Figure 8 is a flow chart of the method of the present invention;

[0097] Fig. 9 It is a schematic diagram of the transition between the working states of the device;

[0098] Among them, 1-housing; 1.1-top surface; 1.2-bottom surface; 1.3-front surface; 1.4-back surface; 1.5-first side surface; 1.6-second side surface; 1.7-inclined surface; 2-injection port; 3-syringe fixing piece; 3.1-upper panel; 3.2-middle panel; 3.3-lower panel; 3.4-first vertical plate; 3.5-second vertical plate; 4-syringe; 5-syringe body; 6-needle; 7-syringe piston; 8-power board; 9-connecting shaft; 10-controller; 11-power module; 12-relay module; 13-first relay Electrical appliances; 13.1-first pilot coil; 13.2-first air outlet of first relay; 13.3-second air outlet of first relay; 13.4-inlet of first relay; 14-second relay; 14.1-second pilot coil; 14.2-first air outlet of second relay; 14.3-second air outlet of second relay; 14.4-inlet of second relay; 15-third relay; 15.1-third pilot coil; 15.2-first air outlet of third relay; 15.3-second air outlet of third relay; 15.4-third Relay air inlet; 16-first cylinder; 16.1-first cylinder body; 16.2-first piston rod; 16.3-first working hole of first cylinder; 16.4-second working hole of first cylinder; 17-second cylinder; 17.1-second cylinder body; 17.2-second piston rod; 17.3-push handle; 17.4-first working hole of second cylinder; 17.5-second working hole of second cylinder; 18-connecting shaft sleeve; 19-third cylinder; 19.1-third cylinder body; 19.2-third piston rod; 19.3-first working hole of third cylinder; 19 .4-the second working hole of the third cylinder; 20-the third cylinder support plate; 21-the connecting plate; 22-the crank; 22.1-the limiting structure; 23-the power button; 24-the single-step mode button; 25-the automatic mode button; 26-the first step button; 27-the second step button; 28-the third step button; 29-the fourth step button; 30-the fifth step button; 31-the sixth step button; 32-the needle pushing control mechanism; 33-the needle inserting and removing control mechanism; 34-the syringe body rotating control mechanism; 35-the control panel; 36-the buffer rubber; 37-the limiting bolt. DETAILED DESCRIPTION

[0099] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in specific embodiments of the present invention.

[0100] like Figure 1, Figure 3 and Figure 4 As shown, the present invention provides a transformer insulating oil chromatographic analysis test sample injection auxiliary device, comprising a housing 1 and a syringe assembly module;

[0101] The syringe assembly module is arranged outside the housing 1 and on the upper part of the injection port 2;

[0102] The syringe assembly module includes a syringe holder 3 and a syringe 4;

[0103] The syringe 4 comprises a syringe body 5, a needle 6 and a syringe piston 7;

[0104] The syringe piston 7 is provided with a needle pushing control mechanism 32, the syringe body 5 is provided on the syringe fixing part 3, and the syringe fixing part 3 is provided with a connecting shaft 9;

[0105] The connecting shaft 9 is perpendicular to the syringe 4 and penetrates the housing 1;

[0106] One end of the connecting shaft 9 is arranged on the syringe fixing member 3, and the other end is arranged inside the housing 1;

[0107] A controller 10 is also provided inside the housing 1, the controller 10 is connected to a power module 11 and a relay module 12, the relay module 12 is connected to a needle insertion and extraction control mechanism 33 and a syringe body rotation control mechanism 34, and the relay module 12 is also connected to the needle push control mechanism 32 and the power module 11;

[0108] The needle insertion and extraction control mechanism 33 and the syringe body rotation control mechanism 34 are both connected to the connecting shaft 9;

[0109] like Figure 2 As shown, the relay module 12 includes a first relay 13, a second relay 14 and a third relay 15, the controller 10 is connected to the first relay 13, the second relay 14 and the third relay 15 respectively, the power module 11 is connected to the first relay 13, the second relay 14 and the third relay 15 respectively, the first relay 13 is connected to the needle pushing control mechanism 32, the second relay 14 is connected to the needle plugging and pulling control mechanism 33, and the third relay 15 is connected to the syringe body rotation control mechanism 34;

[0110] The housing 1 comprises a top surface 1.1, a bottom surface 1.2, a front surface 1.3, a rear surface 1.4, a first side surface 1.5 and a second side surface 1.6; the housing 1 is made of cold-rolled silicon steel, and the outer surfaces of each surface of the housing are provided with a sprayed plastic layer; the housing integrates various components of the fixing device;

[0111] The housing 1 further comprises an inclined surface 1.7, the inclined surface 1.7 connects the top surface 1.1 and the front surface 1.3, and the inclined surface 1.7 also connects the first side surface 1.5 and the second side surface 1.6, and the angle between the inclined surface 1.7 and the bottom surface 1.6 is less than 90 degrees; a control panel 35 is also arranged on the inclined surface 1.7 of the housing 1, and a power button 23, a working mode button and a working step button are arranged on the control panel 35, and the power button 23, the working mode button and the working step button are all connected to the controller 10;

[0112] The working mode buttons include a single-step mode button 24 and an automatic mode button 25;

[0113] The working step buttons include a first step button 26, a second step button 7, a third step button 28, a fourth step button 29, a fifth step button 30 and a sixth step button 31;

[0114] The controller 10 is arranged on the control panel 35;

[0115] The power module 11 is arranged on the power board 8, and the power board 8 is arranged inside the front 1.3 of the housing 1;

[0116] The syringe assembly module is arranged outside the second side surface 1.6;

[0117] The power module 11 includes a switching power supply unit; the switching power supply unit realizes voltage and current conversion from 12V1A to 5V2A;

[0118] like Figure 5 As shown, the syringe fixing member 3 comprises an upper panel 3.1, a middle panel 3.2 and a lower panel 3.3, and the middle parts of the upper panel 3.1, the middle panel 3.2 and the lower panel 3.3 are all provided with grooves;

[0119] The needle 6 of the syringe is arranged at the lower part of the syringe body 5, the syringe body 5 passes through the groove of the lower panel 3.3 and is fixed to the lower panel 3.3, the lower end of the syringe piston 7 is arranged inside the syringe body 5, and the upper end of the syringe piston 7 is arranged in the groove of the middle panel 3.2;

[0120] The push-pin control mechanism 32 includes a first cylinder 16, which includes a first cylinder body 16.1 and a first piston rod 16.2. The first cylinder body 16.1 is arranged on the upper part of the upper panel 3.1, and the first piston rod 16.2 passes through the upper panel 3.1. One end of the first piston rod 16.2 is arranged inside the first cylinder body 16.1, and the other end of the first piston rod 16.2 is arranged on the upper part of the middle panel 3.2; a buffer rubber 36 is arranged between the first piston rod 16.2 and the middle panel 3.2; the buffer rubber 36 is used to buffer the impact force of the first cylinder 16 to avoid the direct force of the cylinder;

[0121] The connecting rotating shaft 9 is arranged on the lower panel 3.3. The connecting rotating shaft 9 is parallel to the bottom surface 1.2 of the housing 1 and perpendicular to the second side surface 1.6. The connecting rotating shaft 9 penetrates through the second side surface 1.6.

[0122] The syringe fixing member 3 is in the shape of a Chinese character 'Ri' and further includes a first vertical plate 3.4 and a second vertical plate 3.5 on both sides. The middle panel 3.2 is in the shape of a 'U' with the opening facing downwards. The two side surfaces of the middle panel 3.2 slide along the first vertical plate 3.4 and the second vertical plate 3.5 on both sides of the syringe fixing member 3 respectively.

[0123] As Figure 5 、 Figure 6 and Figure 7 shown, the needle inserting and extracting control mechanism 33 includes a second cylinder 17 and a connecting rotating shaft sleeve 18.

[0124] The second cylinder 17 includes a second cylinder body 17.1 and a second piston rod 17.2. One end of the second piston rod 17.2 is arranged inside the second cylinder body 17.1, and a push handle 17.3 perpendicular to the second piston rod 17.2 is arranged at the other end of the second piston rod 17.2.

[0125] The second cylinder body 17.1 is arranged inside the second side surface 1.6 and parallel to the second side surface 1.6. The connecting rotating shaft sleeve 18 is arranged at the lower part of the push handle 17.3. The connecting rotating shaft 9 penetrates through the connecting rotating shaft sleeve 18.

[0126] The syringe body rotation control mechanism 34 includes a third cylinder 19 and a third cylinder support plate 20.

[0127] The third cylinder support plate 20 is arranged on the connecting rotating shaft sleeve 18. The third cylinder support plate 20 is parallel to the second side surface 1.6. The third cylinder 19 is arranged on the third cylinder support plate 20.

[0128] The third cylinder 19 includes a third cylinder body 19.1 and a third piston rod 19.2. The third cylinder body 19.1 is fixed on the third cylinder support plate 20. One end of the third piston rod 19.2 is arranged inside the third cylinder body 19.1, and a connecting plate 21 is arranged at the other end of the third piston rod 19.2. A crank 22 is arranged on the connecting plate 21. The crank 22 is connected to the connecting rotating shaft 9 and is parallel to the second side surface 1.6. The controller 10 controls the switch of the third relay, thereby controlling the up and down movement of the third piston rod 19.2, further driving the up and down movement of the connecting plate 21. The connecting plate 21 drives the crank 22 to rotate. The crank 22 drives the connecting rotating shaft 9 to rotate, and the syringe fixing member 3 rotates, realizing the conversion between the vertical state and the horizontal sampling state of the syringe 4.

[0129] The third cylinder support plate 20 is also provided with a limit bolt 37, and the crank 22 is provided with a limit structure 22.1 that cooperates with the limit bolt 37; the limit bolt 37 limits the rotation stroke of the crank 22, thereby ensuring that the syringe 4 is sampled in a horizontal state;

[0130] like Figure 6 As shown, the first relay 13 adopts a two-position five-way solenoid valve, and the first relay 13 includes a first pilot coil 13.1, a first relay first air outlet 13.2, a first relay second air outlet 13.3 and a first relay air inlet 13.4;

[0131] The first cylinder 16 is a double-acting cylinder, and also includes a first working hole 16.3 of the first cylinder and a second working hole 16.4 of the first cylinder; the first pilot coil 13.1 is connected to the controller 10, the first air outlet 13.2 of the first relay is connected to the first working hole 16.3 of the first cylinder, the second air outlet 13.3 of the first relay is connected to the second working hole 16.4 of the first cylinder, and the air inlet 13.4 of the first relay is connected to an air source;

[0132] The second relay 14 adopts a two-position five-way solenoid valve, and the second relay 14 includes a second pilot coil 14.1, a second relay first air outlet 14.2, a second relay second air outlet 14.3, and a second relay air inlet 14.4;

[0133] The second cylinder 17 is a double-acting cylinder, and also includes a second cylinder first working hole 17.4 and a second cylinder second working hole 17.5;

[0134] The second pilot coil 14.1 is connected to the controller 10, the first air outlet 14.2 of the second relay is connected to the first working hole 17.4 of the second cylinder, the second air outlet 14.3 of the second relay is connected to the second working hole 17.5 of the second cylinder, and the air inlet 14.4 of the second relay is connected to the air source;

[0135] The third relay 15 adopts a two-position five-way solenoid valve, and the third relay 15 comprises a third pilot coil 15.1, a third relay first air outlet 15.2, a third relay second air outlet 15.3 and a third relay air inlet 15.4;

[0136] The third cylinder 19 is a double-acting cylinder, and also includes a third cylinder first working hole 19.3 and a third cylinder second working hole 19.4;

[0137] The third pilot coil 15.1 is connected to the controller 10, the first air outlet 15.2 of the third relay is connected to the first working hole 19.3 of the third cylinder, the second air outlet 15.3 of the third relay is connected to the second working hole 19.4 of the third cylinder, and the air inlet 15.4 of the third relay is connected to the air source;

[0138] The first relay 13, the second relay 14 and the third relay 15 are arranged on the bottom surface 1.2 inside the housing 1;

[0139] The opening and closing actions of the double-acting cylinder are driven by the air source; the two-position five-way solenoid valve has two working holes. The controller controls one working hole to connect to the cylinder to realize the opening action, and the other working hole to connect to the cylinder to realize the closing action, thereby ensuring the accuracy and time of the syringe assembly module rotation, needle insertion and removal, and needle pushing actions;

[0140] The first relay 13, the second relay 14 and the third relay 15 all use a two-position five-way solenoid valve of the model 4V110-06-12V; the first cylinder 16 uses a mini cylinder of the model CD12816-20; the second cylinder 17 uses a double-axis cylinder of the model TN16-60; the third cylinder 19 uses a mini cylinder of the model MAL16-50; the selection of cylinder and relay models ensures that the pinhole injection deviation is less than 5 degrees, and the time for inserting the needle-pushing the needle-pulling the needle is less than 1S;

[0141] The air source is a centrifugal air compressor.

[0142] like Figure 8 As shown, the present invention also provides a transformer insulating oil chromatographic analysis test sampling auxiliary method based on the device, comprising the following steps:

[0143] Step S1. The controller controls the working state of the syringe assembly module according to the selected working mode;

[0144] Step S2. When the real-time working mode is a single-step working mode, the controller controls the working state of the syringe assembly module according to the selected working step;

[0145] Step S21. When the real-time working step is the first step, proceed to step S4;

[0146] Step S22. When the real-time working step is the second step, proceed to step S5;

[0147] Step S23. When the real-time working step is the third step, proceed to step S6;

[0148] Step S24. When the real-time working step is the fourth step, proceed to step S7;

[0149] Step S25. When the real-time working step is the fifth step, proceed to step S8;

[0150] Step S26. When the real-time working step is the sixth step, proceed to step S9;

[0151] Step S3. When the real-time working mode is the automatic working mode, proceed to step S4;

[0152] Step S4. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is parallel to the bottom surface;

[0153] The controller sends a signal to the needle push control mechanism, which drives the syringe piston to move horizontally, and the syringe completes sampling;

[0154] Determine the real-time working mode;

[0155] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0156] Step S5. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is perpendicular to the bottom surface, ready for injection;

[0157] Determine the real-time working mode;

[0158] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0159] Step S6. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move downward, so that the syringe needle is inserted into the injection port, completing the needle insertion;

[0160] Determine the real-time working mode;

[0161] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0162] Step S7. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move downward to complete the gas injection;

[0163] Determine the real-time working mode;

[0164] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0165] Step S8. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move upward to separate the syringe needle from the injection port and complete the needle extraction;

[0166] Determine the real-time working mode;

[0167] When the real-time working mode is the single-step working mode, return to step S1; otherwise, proceed to the next step;

[0168] Step S9. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move upward to restore the original state;

[0169] Return to step S1.

[0170] During operation, the working mode is selected through the working mode button, and the human body does not need to touch the syringe assembly module. Select the automatic mode button, and the device will automatically proceed as follows: Fig. 9 The six steps shown are sampling - preparing for sampling - inserting the needle - pushing the needle - pulling out the needle - restoring the initial state; if the single-step working mode is selected, the specific operation steps need to be selected to perform the above six steps separately.

[0171] In GB / T 7252-2001 Guidelines for Analysis and Judgment of Dissolved Gases in Transformer Oil, in order to prevent gas leakage, sample distortion, and changes in operating conditions, the test personnel are required to vertically insert the syringe into the injection port during sampling, and the needle pushing and needle removal must be completed within 1 second. The present invention can achieve the accuracy and time requirements and avoid human errors.

[0172] The embodiments of the present invention are illustrative rather than restrictive. The above embodiments are only to help understand the present invention. Therefore, the present invention is not limited to the embodiments described in the specific implementation manners. Any other specific implementation manners derived by those skilled in the art based on the technical solution of the present invention also belong to the scope of protection of the present invention.

Claims

1. A sampling auxiliary method based on transformer insulating oil chromatography analysis test, characterized in that: A transformer insulating oil chromatographic analysis test sample injection auxiliary device is provided, the device comprising: Comprising a housing (1) and a syringe assembly module; The syringe assembly module is arranged outside the housing (1) and above the injection port (2); The syringe assembly module comprises a syringe fixing member (3) and a syringe (4); The syringe (4) comprises a syringe body (5), a needle (6) and a syringe piston (7); A needle pushing control mechanism (32) is provided on the syringe piston (7), the syringe body (5) is provided on the syringe fixing member (3), and a connecting shaft (9) is provided on the syringe fixing member (3); The connecting shaft (9) is perpendicular to the syringe (4) and penetrates the housing (1); One end of the connecting shaft (9) is arranged on the syringe fixing member (3), and the other end is arranged inside the housing (1); A controller (10) is also provided inside the housing (1), the controller (10) is connected to a power module (11) and a relay module (12), the relay module (12) is connected to a needle insertion and extraction control mechanism (33) and a syringe body rotation control mechanism (34), and the relay module (12) is also connected to the needle push control mechanism (32) and the power module (11); The needle insertion and extraction control mechanism (33) and the syringe body rotation control mechanism (34) are both connected to the connecting shaft (9); The relay module (12) comprises a first relay (13), a second relay (14) and a third relay (15); the controller (10) is connected to the first relay (13), the second relay (14) and the third relay (15) respectively; the power module (11) is connected to the first relay (13), the second relay (14) and the third relay (15) respectively; the first relay (13) is connected to a needle pushing control mechanism (32); the second relay (14) is connected to a needle inserting and removing control mechanism (33); and the third relay (15) is connected to a syringe body rotation control mechanism (34); The housing (1) comprises a top surface (1.1), a bottom surface (1.2), a front surface (1.3), a rear surface (1.4), a first side surface (1.5) and a second side surface (1.6); The syringe assembly module is arranged outside the second side (1.6); The syringe fixing member (3) comprises an upper panel (3.1), a middle panel (3.2) and a lower panel (3.3), wherein the middle parts of the upper panel (3.1), the middle panel (3.2) and the lower panel (3.3) are all provided with grooves; The needle (6) of the syringe is arranged at the lower part of the syringe body (5); the syringe body (5) passes through the groove of the lower panel (3.3) and is fixed to the lower panel (3.3); the lower end of the syringe piston (7) is arranged inside the syringe body (5); and the upper end of the syringe piston (7) is arranged in the groove of the middle panel (3.2); The push-pin control mechanism (32) comprises a first cylinder (16), the first cylinder (16) comprising a first cylinder body (16.1) and a first piston rod (16.2), the first cylinder body (16.1) being arranged on the upper part of the upper panel (3.1), the first piston rod (16.2) penetrating the upper panel (3.1), one end of the first piston rod (16.2) being arranged inside the first cylinder body (16.1), and the other end of the first piston rod (16.2) being arranged on the upper part of the middle panel (3.2); The connecting shaft (9) is arranged on the lower panel (3.3), the connecting shaft (9) is parallel to the bottom surface (1.2) of the housing (1) and perpendicular to the second side surface (1.6), and the connecting shaft (9) passes through the second side surface (1.6); The needle insertion and extraction control mechanism (33) comprises a second cylinder (17) and a connecting shaft sleeve (18); The second cylinder (17) comprises a second cylinder body (17.1) and a second piston rod (17.2); one end of the second piston rod (17.2) is arranged inside the second cylinder body (17.1), and the other end of the second piston rod (17.2) is provided with a push handle (17.3) perpendicular to the second piston rod (17.2); The second cylinder body (17.1) is arranged inside the second side surface (1.6) and is parallel to the second side surface (1.6); the connecting shaft sleeve (18) is arranged at the lower part of the push handle (17.3); and the connecting shaft (9) passes through the connecting shaft sleeve (18); The syringe body rotation control mechanism (34) comprises a third cylinder (19) and a third cylinder support plate (20); The third cylinder support plate (20) is arranged on the connecting shaft sleeve (18), the third cylinder support plate (20) is parallel to the second side surface (1.6), and the third cylinder (19) is arranged on the third cylinder support plate (20); The third cylinder (19) comprises a third cylinder body (19.1) and a third piston rod (19.2); the third cylinder body (19.1) is fixed on a third cylinder support plate (20); one end of the third piston rod (19.2) is arranged inside the third cylinder body (19.1); a connecting plate (21) is arranged on the other end of the third piston rod (19.2); a crank (22) is arranged on the connecting plate (21); the crank (22) is connected to the connecting shaft (9), and the crank (22) is parallel to the second side surface (1.6); The method comprises the following steps: Step S1. The controller controls the working state of the syringe assembly module according to the selected working mode; Step S2. When the real-time working mode is a single-step working mode, the controller controls the working state of the syringe assembly module according to the selected working step; Step S21. When the real-time working step is the first step, proceed to step S4; Step S22. When the real-time working step is the second step, proceed to step S5; Step S23. When the real-time working step is the third step, proceed to step S6; Step S24. When the real-time working step is the fourth step, proceed to step S7; Step S25. When the real-time working step is the fifth step, proceed to step S8; Step S26. When the real-time working step is the sixth step, proceed to step S9; Step S3. When the real-time working mode is the automatic working mode, proceed to step S4; Step S4. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is parallel to the bottom surface; The controller sends a signal to the needle push control mechanism, which drives the syringe piston to move horizontally, and the syringe completes sampling; Determine the real-time working mode; When the real-time working mode is the single-step working mode, return to step S1; Otherwise, proceed to the next step; Step S5. The controller sends a signal to the syringe body rotation control mechanism, and the syringe body rotation control mechanism drives the syringe assembly module to rotate, and the syringe is perpendicular to the bottom surface, ready for injection; Determine the real-time working mode; When the real-time working mode is the single-step working mode, return to step S1; Otherwise, proceed to the next step; Step S6. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move downward, so that the syringe needle is inserted into the injection port, completing the needle insertion; Connect the first judgment real-time working mode; When the real-time working mode is the single-step working mode, return to step S1; Otherwise, proceed to the next step; Step S7. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move downward to complete the gas injection; Determine the real-time working mode; When the real-time working mode is the single-step working mode, return to step S1; Otherwise, proceed to the next step; Step S8. The controller sends a signal to the needle insertion and extraction control mechanism, and the needle insertion and extraction control mechanism drives the syringe assembly module to move upward to separate the syringe needle from the injection port and complete the needle extraction; Determine the real-time working mode; When the real-time working mode is the single-step working mode, return to step S1; Otherwise, proceed to the next step; Step S9. The controller sends a signal to the needle push control mechanism, and the needle push control mechanism drives the syringe piston to move upward to restore the original state; Return to step S1.

2. A method for assisting the sampling of transformer insulating oil chromatographic analysis test according to claim 1, characterized in that the device include: A limiting bolt (37) is also provided on the third cylinder support plate (20), and a limiting structure (22.1) cooperating with the limiting bolt (37) is provided on the crank (22).

3. The sampling auxiliary method based on transformer insulating oil chromatography analysis test according to claim 1 is characterized in that the device include: The first relay (13) adopts a two-position five-way solenoid valve, and the first relay (13) comprises a first pilot coil (13.1), a first relay first air outlet (13.2), a first relay second air outlet (13.3) and a first relay air inlet (13.4); The first cylinder (16) is a double-acting cylinder and further comprises a first cylinder first working hole (16.3) and a first cylinder second working hole (16.4); The first pilot coil (13.1) is connected to the controller (10), the first air outlet (13.2) of the first relay is connected to the first working hole (16.3) of the first cylinder, the second air outlet (13.3) of the first relay is connected to the second working hole (16.4) of the first cylinder, and the air inlet (13.4) of the first relay is connected to an air source; The second relay (14) adopts a two-position five-way solenoid valve, and the second relay (14) comprises a second pilot coil (14.1), a second relay first air outlet (14.2), a second relay second air outlet (14.3) and a second relay air inlet (14.4); The second cylinder (17) is a double-acting cylinder and further comprises a second cylinder first working hole (17.4) and a second cylinder second working hole (17.5); The second pilot coil (14.1) is connected to the controller (10), the first air outlet (14.2) of the second relay is connected to the first working hole (17.4) of the second cylinder, the second air outlet (14.3) of the second relay is connected to the second working hole (17.5) of the second cylinder, and the air inlet (14.4) of the second relay is connected to the air source; The third relay (15) adopts a two-position five-way solenoid valve, and the third relay (15) comprises a third pilot coil (15.1), a third relay first air outlet (15.2), a third relay second air outlet (15.3) and a third relay air inlet (15.4); The third cylinder (19) is a double-acting cylinder and further comprises a third cylinder first working hole (19.3) and a third cylinder second working hole (19.4); The third pilot coil (15.1) is connected to the controller (10), the first air outlet (15.2) of the third relay is connected to the first working hole (19.3) of the third cylinder, the second air outlet (15.3) of the third relay is connected to the second working hole (19.4) of the third cylinder, and the air inlet (15.4) of the third relay is connected to the air source; The first relay (13), the second relay (14) and the third relay (15) are arranged on a bottom surface (1.2) inside the housing (1).

4. The sampling auxiliary method based on transformer insulating oil chromatography analysis test according to claim 1 is characterized in that the device include: The housing (1) further comprises an inclined surface (1.7), the inclined surface (1.7) connecting the top surface (1.1) and the front surface (1.3), the inclined surface (1.7) also connecting the side surface (1.5) and the second side surface (1.6), and the angle between the inclined surface (1.7) and the bottom surface (1.6) is less than 90 degrees; A control panel (35) is also provided on the front (1.3) or the inclined surface (1.7) of the housing (1), and a power button (23), a working mode button, and a working step button are provided on the control panel (35), and the power button (23), the working mode button, and the working step button are all connected to the controller (10); The working mode buttons include a single-step mode button (24) and an automatic mode button (25); The working step buttons include a first step button (26), a second step button (7), a third step button (28), a fourth step button (29), a fifth step button (30) and a sixth step button (31); The controller (10) is arranged on the control panel (35); The power module (11) is arranged on a power board (8), and the power board (8) is arranged inside the front side (1.3) of the housing (1).

5. A method for assisting the sampling of transformer insulating oil chromatographic analysis test according to claim 4, characterized in that the device include: The first cylinder (16) is a mini cylinder with a model number of CD12816-20; The second cylinder (17) is a double-shaft cylinder of model TN16-60; The third cylinder (19) is a mini cylinder of model MAL16-50; The first relay (13), the second relay (14) and the third relay (15) all use a two-position five-way solenoid valve of the 4V110-06-12V model.

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