An on-line monitoring device for gases in transformer oil

Abstract

The present invention discloses an on-line gas monitoring device for transformer oil, which relates to the field of gas monitoring in transformer oil and includes a transformer body, a pump, an oil inlet pipe, a fixed box and an oil return pipe. An electric telescopic rod is fixed on the upper end face of the transformer body. This on-line gas monitoring device for transformer oil adopts a negative pressure suction structure, which can quickly precipitate the dissolved gas in the isolation oil. With the function of a laser chromatograph, the precipitated gas can be detected and analyzed to determine whether there is a fault in the transformer. Specifically, the oil can enter the fixed box through the pump and the oil return pipe. With the cooperation of the electric telescopic rod, the fixed rod, the U-shaped block, the piston and the fixed cavity, the gas in the oil in the fixed box can be quickly precipitated. After the air extraction is completed, when the piston returns to its original position, with the cooperation of the partition plate, the first spring, the fixed plate and the sealing head, the gas in the fixed cavity can enter the laser chromatograph, thus realizing the detection and analysis of the gas.

Description

Technical Field

[0001] The present invention relates to the technical field of gas monitoring in transformer oil, and specifically to an on-line gas monitoring device for transformer oil. Background Technique

[0002] As one of the important power equipment in the power system, the operation status of the oil-immersed transformer directly affects the reliability and safety of the power supply of the power system. When a transformer fails, the dissolved concentration of various gases in the transformer oil is an important indicator reflecting the transformer failure. Therefore, it is necessary to monitor the gases in the transformer oil to monitor whether the transformer is operating normally;

[0003] Existing on-line gas monitoring devices for transformer oil, such as an on-line gas monitoring device for transformer oil with the publication number CN216816681U, mainly achieve the detection function by contacting the detection head with the oil in the transformer. Due to the difference in the dissolved concentration of gases in the oil, it is difficult to ensure the accuracy of the detection. Therefore, in view of the above problems, an on-line gas monitoring device for transformer oil is designed to better meet the actual use requirements. Summary of the Invention

[0004] The purpose of the present invention is to provide an on-line gas monitoring device for transformer oil to solve the problems raised in the above background technique.

[0005] To achieve the above object, the present invention provides the following technical solution: An on-line gas monitoring device in transformer oil, comprising a transformer body, a pump, an oil inlet pipe, a fixed box and an oil return pipe. An electric telescopic rod is fixed on the upper end surface of the transformer body, and a fixed rod is fixed at the output end of the electric telescopic rod. A gas separation mechanism is also fixed on the upper end surface of the transformer body. A sealing mechanism is installed in the fixed box to seal the oil inlet and outlet of the fixed box. A stirring mechanism is also installed in the fixed box. The gas separation mechanism includes a fixed cavity, a piston, a dial rod, a U-shaped block, a partition plate, a sliding rod, a first spring, a fixing plate, a sealing head and a negative pressure sensor. The fixed cavity is fixed to the fixed box, and the fixed cavity is in a "T" shape and communicates with the fixed box. A laser chromatograph is fixed on the fixed cavity. A piston is slidably connected to the horizontal cavity of the fixed cavity. A dial rod is fixed to the right end of the piston, and the dial rod is arranged in the groove of the U-shaped block. The U-shaped block is fixed on the fixed rod. Two partition plates are fixed in the vertical cavity of the fixed cavity. A sliding rod is slidably connected to the partition plate. A first spring is fixed between the sliding rod and the partition plate. A fixing plate is fixed on the sliding rod. A sealing head is fixed to the lower end surface of the fixing plate, and the sealing head cooperates with the opening on the partition plate to achieve sealing. A negative pressure sensor is fixed in the fixed cavity. The electric telescopic rod drives the fixed rod and the U-shaped block to move. The U-shaped block makes the dial rod and the piston move under force. Under the action of air pressure, the lower sealing head is separated from the opening on the partition plate, and the sealing mechanism is cooperated to make the inside of the fixed box form a sealed state, so that a negative pressure state is formed in the fixed box, and the gas in the transformer oil in the fixed box is quickly precipitated.

[0006] Preferably, a pump is fixed on the right end surface of the transformer body. The pump is connected to the fixed box through an oil inlet pipe. The fixed box is fixed on the transformer body. The fixed box is connected to the transformer body through an oil return pipe. Through the above structure, the oil can circulate between the transformer body and the fixed box, thus providing a basic guarantee for the separation of the gas in the oil.

[0007] Preferably, the sealing mechanism includes a cross bar, an inclined panel, a round rod, a vertical rod, a guide rod, a second spring, a connecting rod, a movable plate and a sealing plug. One end of the cross bar is fixedly connected to the fixed rod, and the cross bar is slidably connected to the fixed box, and the other end of the cross bar is fixedly connected to the inclined panel. Driving the cross bar to move through the fixed rod can provide a basic acting force for the movement of the inclined panel.

[0008] Preferably, the inclined panel is slidably connected to the round rod, and the round rod is fixed in the fixed box, and the round rod is slidably connected to the vertical rod. When the inclined panel moves, the sliding guiding effect between the inclined panel and the round rod can ensure the stability of the movement of the inclined panel. Coupled with the sliding action between the round rod and the vertical rod, it can provide a basic acting force for the movement of the vertical rod.

[0009] Preferably, the vertical rod is slidably connected to the guide rod, and the guide rod is fixed in the fixed box. A second spring is fixed between the vertical rod and the fixed box. When the vertical rod moves, the sliding and guiding effect between the vertical rod and the guide rod can ensure the stability of the movement of the vertical rod. With the elastic effect of the second spring, it can provide a basic force for the automatic reset of the vertical rod.

[0010] Preferably, one end of the vertical rod is rotatably connected to the connecting rod, and the other end of the connecting rod is rotatably connected to the movable plate. The movable plate is slidably connected to the guide rod. When the vertical rod moves, with the transmission effect of the connecting rod, it can provide a basic force for the movement of the movable plate.

[0011] Preferably, a sealing plug is fixed on the movable plate, and the sealing plug is matched with the opening on the side of the fixed box to achieve sealing. Through the sealing effect between the sealing plug and the opening on the side of the fixed box, a sealed space can be formed inside the fixed box, thus providing a basic guarantee for the separation of gas in the oil.

[0012] Preferably, the stirring mechanism includes a rotating shaft, stirring rods, gears and convex tooth plates. The rotating shaft is connected by bearings in the fixed box, and the rotating shaft is symmetrically distributed about the center line of the rotating shaft. Stirring rods are fixed on the rotating shaft. Through the action of the stirring rods, the oil in the fixed box can be stirred, so that the gas in the oil in the fixed box can be quickly precipitated.

[0013] Preferably, the stirring rods are equally spaced on the rotating shaft, and the length of the stirring rods is less than the distance between the rotating shaft and the second spring. By limiting the length of the stirring rods, it can be avoided that the stirring rods contact the second spring and hinder the normal operation of the device.

[0014] Preferably, gears are also fixed on the rotating shaft, and the gears are engaged with the convex tooth plates to achieve transmission. The convex tooth plates are symmetrically fixed on the inclined plate front and back. When the inclined plate moves to drive the convex tooth plates to move, with the meshing and transmission effect between the convex tooth plates and the gears, it can provide a basic force for the rotation of the rotating shaft and ensure the normal operation of the device.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The on-line gas monitoring device for transformer oil adopts a negative pressure suction structure, which can quickly precipitate the dissolved gas in the isolated oil fluid. With the cooperation of a laser chromatograph, it can detect and analyze the precipitated gas to determine whether there is a fault in the transformer. Specifically, the oil fluid can enter the fixed box through a pump and a return pipe, and the oil inlet of the fixed box is sealed with the cooperation of a sealing mechanism, so that the fixed box forms a sealed space. Then, with the cooperation of an electric telescopic rod, a fixed rod, a U-shaped block, a piston and a fixed cavity, the air extraction function can be realized, so that a negative pressure state is formed in the fixed box, and the gas in the oil fluid in the fixed box can be quickly precipitated. After the air extraction is completed, when the piston returns to its original position, with the cooperation of a partition plate, a first spring, a fixed plate and a sealing head, the gas in the fixed cavity can enter the laser chromatograph, so as to realize the detection and analysis of the gas;

[0017] 2. The on-line gas monitoring device for transformer oil can form a sealed space in the fixed box when separating the gas in the oil fluid in the fixed box through a linked sealing mechanism, ensuring the normal operation of the device. Specifically, through the action of an electric telescopic rod, a fixed rod and a cross bar, the inclined panel is moved. With the cooperation of the inclined panel, a vertical rod and a connecting rod, the movable plate and the sealing plug are moved, and the oil inlet of the fixed box is sealed by the sealing plug, ensuring that the fixed box is in a sealed state during gas extraction for subsequent gas separation;

[0018] 3. The on-line gas monitoring device for transformer oil can stir the oil fluid when separating the gas in the oil fluid in the fixed box through a connected stirring mechanism, thereby further accelerating the precipitation of gas. Specifically, when the inclined panel drives the convex tooth plate to move, with the cooperation of the convex tooth plate and the gear, the rotating shaft and the stirring rod rotate, so as to realize the oil fluid stirring function and facilitate the rapid precipitation of gas in the oil fluid. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic perspective side view of the whole device of the present invention;

[0020] Figure 2 It is a schematic perspective side view of the fixed box of the present invention;

[0021] Figure 3 It is a schematic perspective front sectional view of the fixed box of the present invention;

[0022] Figure 4 It is a schematic perspective bottom sectional view of the fixed cavity of the present invention;

[0023] Figure 5 It is a schematic exploded perspective view of the partition plate and the sealing head of the present invention;

[0024] Figure 6This is a three-dimensional structural schematic diagram composed of the sealing mechanism and the stirring mechanism of the present invention.

[0025] In the figure: 1. Transformer body; 2. Pump; 3. Inlet oil pipe; 4. Fixed box; 5. Return oil pipe; 6. Electric telescopic rod; 7. Fixed rod; 8. Gas separation mechanism; 801. Fixed cavity; 802. Piston; 803. Pushing rod; 804. U-shaped block; 805. Partition board; 806. Slide rod; 807. First spring; 808. Fixed plate; 809. Sealing head; 810. Negative pressure sensor; 9. Laser chromatograph; 10. Sealing mechanism; 1001. Cross bar; 1002. Inclined panel; 1003. Round rod; 1004. Vertical rod; 1005. Guide rod; 1006. Second spring; 1007. Connecting rod; 1008. Movable plate; 1009. Sealing plug; 11. Stirring mechanism; 1101. Rotating shaft; 1102. Stirring rod; 1103. Gear; 1104. Convex tooth plate. Detailed implementation mode

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 - 6 , the present invention provides a technical solution: an on-line gas monitoring device for transformer oil, including a transformer body 1, a pump 2, an inlet oil pipe 3, a fixed box 4 and a return oil pipe 5. An electric telescopic rod 6 is fixed on the upper end surface of the transformer body 1, a fixed rod 7 is fixed at the output end of the electric telescopic rod 6, and a gas separation mechanism 8 is also fixed on the upper end surface of the transformer body 1. A sealing mechanism 10 is installed in the fixed box 4 to seal the oil inlet and outlet of the fixed box 4, and a stirring mechanism 11 is also installed in the fixed box 4.

[0028] A pump 2 is fixed to the right end face of the transformer body 1. The pump 2 is connected to a fixed box 4 through an oil inlet pipe 3. The fixed box 4 is fixed on the transformer body 1, and the fixed box 4 is connected to the transformer body 1 through an oil return pipe 5. The sealing mechanism 10 includes a cross bar 1001, an inclined panel 1002, a round rod 1003, a vertical rod 1004, a guide rod 1005, a second spring 1006, a connecting rod 1007, a movable plate 1008 and a sealing plug 1009. One end of the cross bar 1001 is fixedly connected to the fixed rod 7, and the cross bar 1001 is slidably connected to the fixed box 4. The other end of the cross bar 1001 is fixedly connected to the inclined panel 1002. The inclined panel 1002 is slidably connected to the round rod 1003. The round rod 1003 is fixed in the fixed box 4, and the round rod 1003 is slidably connected to the vertical rod 1004. The vertical rod 1004 is slidably connected to the guide rod 1005. The guide rod 1005 is fixed in the fixed box 4. A second spring 1006 is fixed between the vertical rod 1004 and the fixed box 4. One end of the vertical rod 1004 is rotatably connected to one end of the connecting rod 1007, and the other end of the connecting rod 1007 is rotatably connected to the movable plate 1008. The movable plate 1008 is slidably connected to the guide rod 1005. A sealing plug 1009 is fixed on the movable plate 1008, and the sealing plug 1009 is matched with the opening on the side of the fixed box 4 to achieve sealing.

[0029] When using this on-line monitoring device for gases in transformer oil, such as Figures 1 - 6As shown, by controlling the start of the pump 2 and cooperating with the function of the inlet pipe 3, a part of the oil in the transformer body 1 is pumped into the fixed box 4. With the function of the return pipe 5, the oil entering the fixed box 4 can flow back into the transformer body 1, so that the oil circulates between the transformer body 1 and the fixed box 4. When it is necessary to detect the dissolved gas in the oil, only need to control the electric telescopic rod 6 to extend, which drives the fixed rod 7, the U-shaped block 804 and the cross bar 1001 to move. The movement of the cross bar 1001 drives the inclined panel 1002 to move. With the sliding guiding function between the inclined panel 1002 and the round rod 1003, the stability of the movement of the inclined panel 1002 can be ensured. At this time, the inclined surface of the inclined panel 1002 contacts and slides with the vertical rod 1004, so that the vertical rod 1004 is forced to move downward. At this time, the second spring 1006 is forced to contract. When the vertical rod 1004 moves downward, with the sliding function between the vertical rod 1004 and the guiding rod 1005, the stability of the movement of the vertical rod 1004 can be ensured. And when the vertical rod 1004 moves, with the transmission function of the connecting rod 1007, the movable plate 1008 and the sealing plug 1009 move. When the vertical rod 1004 slides from the inclined surface of the inclined panel 1002 to the lower plane of the inclined panel 1002, the sealing plug 1009 just seals the oil inlet and outlet of the fixed box 4, so that a sealed space is formed in the fixed box 4. And at this time, the convex block on the left side of the U-shaped block 804 just contacts the dial rod 803, that is, during the process of forming a sealed space in the fixed box 4, the dial rod 803 remains stationary and no air extraction operation is performed;

[0030] The gas separation mechanism 8 includes a fixed chamber 801, a piston 802, a lever 803, a U-shaped block 804, a partition plate 805, a sliding rod 806, a first spring 807, a fixing plate 808, a sealing head 809 and a negative pressure sensor 810. The fixed chamber 801 is fixed to the fixed box 4, and the fixed chamber 801 is of a "T" shape and communicates with the fixed box 4. A laser chromatograph 9 is fixed on the fixed chamber 801. A piston 802 is slidably connected to the horizontal cavity of the fixed chamber 801. A lever 803 is fixed to the right end of the piston 802. The lever 803 is arranged in the groove of the U-shaped block 804. The U-shaped block 804 is fixed to the fixed rod 7. Two partition plates 805 are fixed in the vertical cavity of the fixed chamber 801. A sliding rod 806 is slidably connected to the partition plate 805. A first spring 807 is fixed between the sliding rod 806 and the partition plate 805. A fixing plate 808 is fixed to the sliding rod 806. A sealing head 809 is fixed to the lower end surface of the fixing plate 808. The sealing head 809 is matched with the opening on the partition plate 805 to achieve sealing. A negative pressure sensor 810 is fixed in the fixed chamber 801. The electric telescopic rod 6 drives the fixed rod 7 and the U-shaped block 804 to move. The lever 803 and the piston 802 are forced to move through the U-shaped block 804. Under the action of air pressure, the lower sealing head 809 is separated from the opening on the partition plate 805. Cooperating with the sealing mechanism 10, a sealed state is formed inside the fixed box 4, so that a negative pressure state is formed inside the fixed box 4, and the gas in the transformer oil inside the fixed box 4 is quickly precipitated;

[0031] After a sealed state is formed inside the fixed box 4, such as Figures 1 - 6As shown, at this time, the electric telescopic rod 6 continues to extend, thereby driving the fixed rod 7, the U-shaped block 804 and the cross bar 1001 to move. At this time, the U-shaped block 804 exerts a force on the lever 803, causing the lever 803 to move, and synchronously driving the piston 802 to slide outward in the fixed cavity 801, thereby realizing the air extraction function. At this time, under the action of air pressure, the sealing head 809 and the fixed plate 808 on the lower partition plate 805 in the fixed cavity 801 are forced to move. With the sliding guiding function between the sliding rod 806 and the partition plate 805, the stability of the movement of the sealing head 809 and the fixed plate 808 is ensured, so that the lower sealing head 809 is separated from the lower partition plate 805, releasing the sealed state. At this time, the upper sealing head 809 cooperates with the upper partition plate 805 and is in a sealed state. By continuously moving the piston 802 in the fixed cavity 801, the air extraction function of the fixed box 4 can be realized, so that a negative pressure state is formed in the fixed box 4. With the function of the negative pressure sensor 810, the magnitude of the negative pressure can be detected, ensuring that the negative pressure state in the fixed box 4 is between -1 kPa and -3 kPa and remains for 10 s to 20 s, thereby accelerating the precipitation of dissolved gas in the oil in the fixed box 4. The precipitated gas enters the fixed cavity 801, thereby realizing the separation of the oil and the gas. After the gas separation is completed, the electric telescopic rod 6 contracts at this time, driving the fixed rod 7, the U-shaped block 804 and the cross bar 1001 to reset. At this time, with the elastic action of the first spring 807, the lower sealing head 809 cooperates with the lower partition plate 805 for sealing, and at this time, the piston 802 slides inward in the fixed cavity 801, increasing the air pressure in the fixed cavity 801. Through the action of air pressure, the upper sealing head 809 is separated from the upper partition plate 805, so that the gas collected in the fixed cavity 801 enters the laser chromatograph 9 for detection and analysis;

[0032] The stirring mechanism 11 includes a rotating shaft 1101, stirring rods 1102, gears 1103 and a convex tooth plate 1104. The rotating shaft 1101 is connected by bearings in the fixed box 4, and the rotating shaft 1101 is symmetrically distributed front and back about the center line of the rotating shaft 1101, and stirring rods 1102 are fixed on the rotating shaft 1101; the stirring rods 1102 are evenly distributed on the rotating shaft 1101, and the length of the stirring rods 1102 is less than the distance between the rotating shaft 1101 and the second spring 1006; a gear 1103 is also fixed on the rotating shaft 1101, and the gear 1103 is engaged with the convex tooth plate 1104 to realize transmission, and the convex tooth plate 1104 is symmetrically fixed on the inclined panel 1002 front and back;

[0033] After a sealed state is formed inside the fixed box 4, as Figures 1 - 6As shown, when the electric telescopic rod 6 continues to extend and drives the fixed rod 7 and the cross bar 1001 to move, it synchronously drives the inclined panel 1002 and the convex tooth plate 1104 to move. When the convex tooth plate 1104 meshes with the gear 1103 for transmission, the rotating shaft 1101 and the stirring rod 1102 rotate. Through the action of the stirring rod 1102, the oil liquid isolated and sealed in the fixed box 4 can be stirred, thereby further accelerating the precipitation of the dissolved gas in the oil liquid and ensuring the detection efficiency. This is the working principle of the on-line gas monitoring device for transformer oil.

[0034] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An on-line gas monitoring device for transformer oil, comprising a transformer body (1), a pump (2), an inlet pipe (3), a fixed box (4) and a return pipe (5), characterized in that: An electric telescopic rod (6) is fixed to the upper end face of the transformer body (1). A fixed rod (7) is fixed to the output end of the electric telescopic rod (6). A gas separation mechanism (8) is also fixed to the upper end face of the transformer body (1). A sealing mechanism (10) is installed in the fixed box (4) to seal the oil inlet and outlet of the fixed box (4). A stirring mechanism (11) is also installed in the fixed box (4). The gas separation mechanism (8) includes a fixed cavity (801), a piston (802), a lever (803), a U-shaped block (804), a partition plate (805), a slide rod (806), a first spring (807), a fixing plate (808), a sealing head (809), and a negative pressure sensor (810). The fixed cavity (801) is fixed to the fixed box (4), and the fixed cavity (801) is of a "T" shape and communicates with the fixed box (4). A laser chromatograph (9) is fixed to the fixed cavity (801). A piston (802) is slidably connected to the horizontal cavity of the fixed cavity (801). A lever (803) is fixed to the right end of the piston (802). The lever (803) is arranged in the groove of the U-shaped block (804). The U-shaped block (804) is fixed to the fixed rod (7). Two partition plates (805) are fixed in the vertical cavity of the fixed cavity (801). A slide rod (806) is slidably connected to the partition plate (805). A first spring (807) is fixed between the slide rod (806) and the partition plate (805). A fixing plate (808) is fixed to the slide rod (806). A sealing head (809) is fixed to the lower end face of the fixing plate (808). The sealing head (809) cooperates with the opening in the partition plate (805) to achieve sealing. A negative pressure sensor (810) is fixed in the fixed cavity (801). The electric telescopic rod (6) drives the fixed rod (7) and the U-shaped block (804) to move. The lever (803) and the piston (802) are forced to move by the U-shaped block (804). Under the action of air pressure, the lower sealing head (809) is separated from the opening in the partition plate (805). Cooperating with the sealing mechanism (10), a sealed state is formed inside the fixed box (4), so that a negative pressure state is formed inside the fixed box (4), and the gas in the transformer oil inside the fixed box (4) is quickly precipitated; The sealing mechanism (10) includes a cross bar (1001), an inclined panel (1002), a round bar (1003), a vertical bar (1004), a guide bar (1005), a second spring (1006), a connecting rod (1007), a movable plate (1008) and a sealing plug (1009). One end of the cross bar (1001) is fixedly connected to the fixed bar (7), and the cross bar (1001) is slidably connected to the fixed box (4). The other end of the cross bar (1001) is fixedly connected to the inclined panel (1002). The inclined panel (1002) is slidably connected to the round bar (1003), and the round bar (1003) is fixed inside the fixed box (4). The round bar (1003) is slidably connected to the vertical bar (1004). The vertical bar (1004) is slidably connected to the guide bar (1005), and the guide bar (1005) is fixed inside the fixed box (4). A second spring (1006) is fixed between the vertical bar (1004) and the fixed box (4). One end of the vertical bar (1004) is rotatably connected to one end of the connecting rod (1007), and the other end of the connecting rod (1007) is rotatably connected to the movable plate (1008). The movable plate (1008) is slidably connected to the guide bar (1005). The movable plate (1008) is fixed with a sealing plug (1009), and the sealing plug (1009) cooperates with the oil inlet and outlet on the side of the fixed box (4) to achieve sealing.

2. The on-line gas monitoring device for transformer oil according to claim 1, characterized in that: A pump (2) is fixed to the right end face of the transformer body (1). The pump (2) is connected to the fixed box (4) through an oil inlet pipe (3). The fixed box (4) is fixed on the transformer body (1). The fixed box (4) is connected to the transformer body (1) through an oil return pipe (5).

3. The on-line gas monitoring device for transformer oil according to claim 1, characterized in that: The stirring mechanism (11) includes a rotating shaft (1101), stirring rods (1102), gears (1103) and convex tooth plates (1104). The rotating shaft (1101) is connected by bearings inside the fixed box (4). The rotating shaft (1101) is symmetrically distributed front and back about the center line of the rotating shaft (1101). Stirring rods (1102) are fixed on the rotating shaft (1101).

4. The on-line gas monitoring device for transformer oil according to claim 3, characterized in that: The stirring rods (1102) are evenly distributed on the rotating shaft (1101), and the length of the stirring rods (1102) is less than the distance between the rotating shaft (1101) and the second spring (1006).

5. The on-line gas monitoring device for transformer oil according to claim 3, characterized in that: Gears (1103) are also fixed on the rotating shaft (1101). The gears (1103) cooperate with the convex tooth plates (1104) to achieve transmission. The convex tooth plates (1104) are symmetrically fixed on the inclined panel (1002) front and back.

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