A protection device for machine room and substation UPS

Abstract

The application relates to the technical field of UPS, in particular to a protection device for machine rooms and transformer substations, which comprises a protective shell, a cooling mechanism for cooling the electricity inside the protective shell, an air inlet shell fixed to one side of the outer wall of the protective shell, a fixing cylinder inserted into one end of the outer wall of the air inlet shell, an air extraction fan installed on the inner wall of the fixing cylinder, and air outlet holes with equal distances arranged on the top of the outer wall of the air inlet shell. The cooling mechanism is provided, the air extraction pump is started, the air outside can be extracted into the air inlet shell, the filter screen can preliminarily filter the dust in the air, the filtered air can enter the protective shell through the hollow shell, the heat exchange pipe and the exhaust pipe, the water extraction pump is started, the water in the water storage shell can be sprayed onto the outer wall of the heat exchange pipe through the output pipe and the liquid spraying nozzles on the liquid spraying pipes, and the air on the heat exchange pipe can be cooled.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of UPS, and particularly relates to a protection device for a machine room and a substation UPS. BACKGROUND

[0002] UPS, namely, an uninterruptible power supply, is a system device which is connected with a storage battery (mainly a lead-acid maintenance-free storage battery) and a host computer, and converts direct current into commercial power through a host computer inverter module circuit. The UPS is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment such as an electromagnetic valve and a pressure transmitter. When commercial power input is normal, the UPS supplies the commercial power after voltage stabilization to a load, at this time, the UPS is an AC type voltage stabilizer, and it also charges a battery in the machine; when the commercial power is interrupted (accidental power failure), the UPS immediately supplies 220V alternating current to the load through direct current of the battery and inverter switching conversion, so that the load maintains normal work and the load software and hardware are protected from damage.

[0003] A protection device for a machine room and a substation UPS is disclosed in Chinese Patent No. CN110190667B, which comprises a cabinet body and a supporting bottom plate and a side clamping plate installed in the cabinet body. The cabinet body is a rectangular box structure, universal wheels are fixedly installed at the bottom corners of the cabinet body, and a group of vertical sides are provided with openings. The supporting bottom plate is arranged at the bottom end inside the cabinet body and is fixedly connected with the inner bottom wall of the cabinet body through a first spring and a first supporting rod. The side clamping plate is clamped in the recesses symmetrically formed in the two groups of vertical sides inside the cabinet body, and the two ends of the side clamping plate extend outward and are provided with outer edges clamped with the recesses. Four groups of supporting devices arranged in a rectangular array are elastically connected between the bottom end of the outer edge and the inner bottom wall of the recess. A heat dissipation fan is further fixedly installed on the inner bottom wall of the recess. The protection device for the machine room and the substation UPS.

[0004] However, the above-mentioned patent has the following disadvantages. The electrical appliances inside the cabinet are cooled by the heat dissipation fan. After long-term use, dust will adhere to the outer wall of the electrical appliances. The dust on the outer wall of the electrical appliances is difficult to be sucked away by the dust collector, so the dust still exists on the outer wall of the electrical appliances, which affects the use effect. SUMMARY

[0005] The application aims to provide a protection device for a machine room and a substation UPS to solve the problems in the background art.

[0006] The technical scheme of the application is as follows: a protection device for a machine room and a substation UPS, comprising a protective shell, and further comprising;

[0007] The cooling mechanism is used for cooling the electricity inside the protective shell, and the cooling mechanism comprises an air inlet shell fixed to one side of the outer wall of the protective shell, and a fixing cylinder is inserted into one end of the outer wall of the air inlet shell, and an air extraction fan is installed on the inner wall of the fixing cylinder, and a plurality of air outlet holes are arranged at equal distances on the top outer wall of the air inlet shell.

[0008] The fixing mechanism comprises an opening arranged on one end of the outer wall of the protective shell, a door plate hingedly connected to one side of the inner wall of the opening, a fixing gear ring rotatably connected to one end of the outer wall of the door plate through a bearing, a reinforcing rib column installed on one end of the outer wall of the fixing gear ring, and a plurality of air exhaust grooves arranged at equal distances on the top outer wall of the protective shell.

[0009] The first fixing plate is used for fixedly mounting the electricity, and a rectangular slot is arranged on each side of the inner wall of the bottom of the protective shell, and the same screw rod is rotatably connected to the inner walls at both ends of one of the rectangular slots, and the same limiting rod is installed on the inner walls at both ends of the other rectangular slot, the outer wall of the screw rod is rotatably connected with the first sliding block through threads, the outer wall of the limiting rod is slidably connected with the second sliding block, and the top outer walls of the second sliding block and the first sliding block are fixedly connected with the bottom outer wall of the first fixing plate.

[0010] Preferably, mounting grooves are arranged on both sides of the bottom outer wall of the first fixing plate, a support leg is hingedly connected to one end of the inner wall of the mounting groove, a sliding wheel is arranged on one end of the support leg, one end of the screw rod extends to the outside of the protective shell, and a detachable hand wheel is arranged on the outer wall of one end of the screw rod.

[0011] Preferably, a fixing shaft is rotatably connected to one end of the outer wall of the door plate through a bearing, a driving gear is sleeved on one end of the circumferential outer wall of the fixing shaft, the driving gear is engaged with the fixing gear ring, a polygonal slot is arranged on the outer wall of one end of the fixing shaft, a password lock is hingedly connected to one end of the outer wall of the door plate, and the password lock is located outside the fixing shaft.

[0012] Preferably, a circular slot is arranged on one side of the outer wall of the air inlet shell, a filter screen is fixedly connected to the inner wall of the circular slot, hollow shells are installed on both sides of the inner wall of the air inlet shell, openings are arranged on the opposite sides of the two hollow shells, a second fixing plate is rotatably connected to the inner wall of the opening through a bearing, and heat exchange pipes are inserted into the opposite sides of the two second fixing plates at equal distances.

[0013] Preferably, an air suction pump is installed on one side of the hollow shell close to the filter screen, and the output air pipe of the air suction pump extends to the inside of the corresponding hollow shell.

[0014] Preferably, the hollow shell body side wall away from the side wall of the exhaust pump is rotatably connected with an exhaust pipe through a bearing, the circumferential outer wall of the exhaust pipe is provided with equidistantly distributed arc-shaped hollow shells, and the outer wall of one end of the arc-shaped hollow shell is provided with equidistantly distributed air outlet grooves; the connection part between the air inlet shell and the protective shell is provided with equidistantly distributed communication grooves.

[0015] Preferably, the bottom outer wall of the air inlet shell is inserted with a backwater pipe, the bottom outer wall of the protective shell is provided with a water storage shell, and the bottom of the backwater pipe extends into the water storage shell.

[0016] Preferably, the bottom outer wall of the water storage shell is provided with a water pump on one side, and the input end of the water pump is provided with an input pipe, the other end of the input pipe extends into the water storage shell; the output end of the water pump is provided with an output pipe, the other end of the output pipe extends into the air inlet shell, and the top outer wall of the water storage shell is inserted with a water adding pipe on one side.

[0017] Preferably, the bottom outer wall of the protective shell is provided with wheels at four corners, and the other end of the output pipe is provided with a liquid spraying pipe, and the bottom outer wall of the liquid spraying pipe is provided with equidistantly distributed liquid spraying nozzles.

[0018] The present application improves the protection device for machine room and substation UPS, and has the following improvements and advantages compared with the prior art:

[0019] Firstly, the first fixed plate on the first sliding block and the second sliding block is moved to the outside of the protective shell by rotating the hand wheel and the lead screw, then the sliding wheels on the supporting legs of the first fixed plate are rotated to the vertical state, so that the pulley is in contact with the ground, the stability of the first fixed plate is ensured, and the subsequent electrical quick installation on the first fixed plate is facilitated.

[0020] Secondly, the door plate is fixed on the protective shell by setting the door plate, the fixed gear ring and the reinforcing rib column, the tool is inserted into the polygonal groove, the driving gear on the fixed shaft is rotated, the driving gear can drive the fixed gear ring to rotate, the reinforcing rib column on the fixed gear ring is fixed on the protective shell, so that the door plate cannot be opened without rotating the reinforcing rib column to separate from the protective shell, the safety of the fixing is improved, and the polygonal groove on the fixed shaft is protected by the password lock, further improving the safety of the fixing.

[0021] Thirdly, the cooling mechanism is arranged, the air suction pump is opened, the air outside can be sucked into the air inlet shell, the filter screen can preliminarily filter the dust in the air, the filtered air enters the protective shell through the hollow shell, the heat exchange pipe and the exhaust pipe, the water suction pump is opened, the water in the water storage shell is sprayed onto the outer wall of the heat exchange pipe through the output pipe and the liquid spraying nozzle on the liquid spraying pipe, the air on the heat exchange pipe can be cooled, the air suction fan is opened, the air outside can be sucked into the air inlet shell, the water vapor on the outer wall of the heat exchange pipe can be rapidly evaporated, so that the temperature of the air in the heat exchange pipe is reduced, the air is sprayed out of the air outlet groove on the arc-shaped hollow shell, the exhaust pipe can be driven to rotate, so that the liquid spraying nozzle can uniformly spray the mist on the outer wall of the heat exchange pipe, and the cooling effect is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be further explained in connection with the drawings and embodiments:

[0023] Figure 1 is a perspective structural schematic diagram of the application;

[0024] Figure 2 is a bottom view structural schematic diagram of the application;

[0025] Figure 3 is a cooling mechanism structural schematic diagram of the application;

[0026] Figure 4 is a door plate sectional view structural schematic diagram of the application;

[0027] Figure 5 is a first fixed plate sectional view structural schematic diagram of the application;

[0028] Figure 6 is an air inlet shell sectional view structural schematic diagram of the application;

[0029] Figure 7 is an exhaust pipe structural schematic diagram of the application.

[0030] BRIEF DESCRIPTION OF DRAWINGS:

[0031] 1, water storage shell; 2, cooling mechanism; 201, air inlet shell; 202, filter screen; 203, fixed cylinder; 204, air suction fan; 3, protective shell; 4, exhaust groove; 5, door plate; 6, fixed shaft; 7, driving gear; 8, fixed gear ring; 9, reinforcing column; 10, first fixed plate; 11, password lock; 12, support leg; 13, wheel; 14, water suction pump; 15, output pipe; 16, mounting groove; 17, screw rod; 18, limiting rod; 19, polygonal groove; 20, liquid spraying pipe; 21, air suction pump; 22, hollow shell; 23, arc-shaped hollow shell; 24, exhaust pipe; 25, heat exchange pipe; 26, backwater pipe; 27, second fixed plate; 28, air outlet groove. Detailed Implementation

[0032] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides an improved protection device for UPS systems in computer rooms and substations. The technical solution of this invention is as follows:

[0034] like Figures 1-6 As shown, a protection device for UPS in computer rooms and substations includes a protective housing 3, and also includes;

[0035] Cooling mechanism 2 is used to cool the electrical components inside the protective housing 3. Cooling mechanism 2 includes an air inlet housing 201 fixed to the outer wall of one side of the protective housing 3, and a fixing cylinder 203 is inserted into the outer wall of one end of the air inlet housing 201. An exhaust fan 204 is installed on the inner wall of the fixing cylinder 203, and air outlet holes are evenly distributed on the top outer wall of the air inlet housing 201.

[0036] The fixed mechanism has an opening on one end of the outer wall of the protective shell 3, and a door panel 5 is hinged to the inner wall on one side of the opening. A fixed gear ring 8 is rotatably connected to one end of the outer wall of the door panel 5 through a bearing, and a reinforcing rib 9 is installed on one end of the outer wall of the fixed gear ring 8. The top outer wall of the protective shell 3 has equally spaced exhaust slots 4.

[0037] The first fixing plate 10 is used for the fixed installation of electrical components. Rectangular grooves are provided on both sides of the bottom inner wall of the protective housing 3. The inner walls of the two ends of one rectangular groove are rotatably connected to the same lead screw 17, and the inner walls of the two ends of the other rectangular groove are installed with the same limiting rod 18. The outer wall of the lead screw 17 is rotatably connected to a first sliding block by a thread. The outer wall of the limiting rod 18 is slidably connected to a second sliding block. The top outer walls of the second sliding block and the first sliding block are fixedly connected to the bottom outer wall of the first fixing plate 10. By rotating the lead screw 17 by handwheel, the first fixing plate 10 on the first sliding block and the second sliding block is moved to the outside of the protective housing 3. Then, the sliding wheel on the support leg 12 on the first fixing plate 10 is rotated to a vertical position so that the pulley is in contact with the ground, ensuring the stability of the movement of the first fixing plate 10 and facilitating the quick installation of electrical components on the first fixing plate 10.

[0038] Further, the outer wall of the bottom of the first fixed plate 10 is provided with a mounting groove 16 on both sides, and the inner wall of the mounting groove 16 is hingedly connected with a supporting leg 12, one end of the supporting leg 12 is provided with a sliding wheel, one end of the lead screw 17 extends to the outside of the protective shell 3, and the outer wall of one end of the lead screw 17 is provided with a detachable hand wheel.

[0039] Further, the outer wall of one end of the door plate 5 is rotatably connected with a fixed shaft 6 through a bearing, and the circumferential outer wall of one end of the fixed shaft 6 is sleeved with a driving gear 7, the driving gear 7 is engaged with a fixed gear ring 8, a polygonal groove 19 is formed in the outer wall of one end of the fixed shaft 6, and a password lock 11 is hingedly connected to the outer wall of one end of the door plate 5. The password lock 11 is located outside the fixed shaft 6. By providing the door plate 5, the fixed gear ring 8 and the reinforcing rib 9, the door plate 5 is fixed on the protective shell 3. By inserting a tool into the polygonal groove 19, the driving gear 7 on the fixed shaft 6 is driven to rotate, the driving gear 7 can drive the fixed gear ring 8 to rotate, so that the reinforcing rib 9 on the fixed gear ring 8 is fixed on the protective shell 3, so that the door plate 5 cannot be opened when the reinforcing rib 9 does not rotate and separate from the protective shell 3, thereby improving the security of the fixed, and the password lock 11 can protect the polygonal groove 19 on the fixed shaft 6, further improving the security of the fixed.

[0040] Further, the outer wall of one side of the air inlet shell 201 is provided with a circular groove, and the inner wall of the circular groove is fixedly connected with a filter screen 202, and the inner wall of the air inlet shell 201 is provided with a hollow shell 22 on both sides, the outer wall of the opposite side of the two hollow shells 22 is provided with an opening, the inner wall of the opening is rotatably connected with a second fixed plate 27 through a bearing, and the outer wall of the opposite side of the two second fixed plates 27 is inserted with a heat exchange pipe 25 distributed at equal distances.

[0041] Further, the hollow shell 22 close to the filter screen 202 is provided with an air pump 21 on one side of the outer wall, and the output air pipe of the air pump 21 extends into the corresponding hollow shell 22. Turning on the air pump 21 can suck the air outside into the air inlet shell 201, and the filter screen 202 can preliminarily filter the dust in the air. The filtered air enters the protective shell 3 through the hollow shell 22, the heat exchange pipe 25 and the exhaust pipe 24.

[0042] Further, the outer wall of the hollow shell 22 away from the side of the air pump 21 is rotatably connected with the exhaust pipe 24 through the bearing, the circumferential outer wall of the exhaust pipe 24 is installed with the arc hollow shell 23 distributed at equal distance, and the outer wall of one end of the arc hollow shell 23 is provided with the air outlet slot 28 distributed at equal distance, the connecting place of the arc hollow shell 23 and the exhaust pipe 24 is provided with the ventilation slot, the connecting place of the air inlet shell 201 and the protective shell 3 is provided with the communication slot distributed at equal distance, the exhaust fan 204 is opened, the air outside can be sucked into the air inlet shell 201, so that the water vapor on the outer wall of the heat exchange pipe 25 is rapidly evaporated, thereby reducing the temperature of the air in the heat exchange pipe 25, since the air outlet slot 28 on the arc hollow shell 23 sprays the air, the exhaust pipe 24 can be driven to rotate, so that the liquid jet nozzle can uniformly spray the spray on the outer wall of the heat exchange pipe 25, and the cooling effect is ensured.

[0043] Further, the bottom outer wall of the air inlet shell 201 is inserted with the backwater pipe 26, the bottom outer wall of the protective shell 3 is installed with the water storage shell 1, and the bottom of the backwater pipe 26 extends into the water storage shell 1, the inside of the water storage shell 1 is provided with the filter screen, which can filter the impurities in the water, and ensure the normal operation of the subsequent liquid spraying work.

[0044] Further, the bottom outer wall of the water storage shell 1 is installed with the water pump 14 on one side, and the input end of the water pump 14 is installed with the input pipe, the other end of the input pipe extends into the water storage shell 1, the output end of the water pump 14 is installed with the output pipe 15, the other end of the output pipe 15 extends into the air inlet shell 201, and the top outer wall of the water storage shell 1 is inserted with the water adding pipe on one side.

[0045] Further, the bottom outer wall of the protective shell 3 is installed with the wheel 13 at four corners, and the other end of the output pipe 15 is installed with the liquid jet pipe 20, the bottom outer wall of the liquid jet pipe 20 is installed with the liquid jet nozzle distributed at equal distance, the water in the water storage shell 1 is sprayed onto the outer wall of the heat exchange pipe 25 through the liquid jet nozzle on the output pipe 15 and the liquid jet pipe 20 by opening the water pump 14, so that the air on the heat exchange pipe 25 can be cooled.

[0046] Working principle: through the hand wheel rotates the screw rod 17, thereby driving the first sliding block and the second sliding block on the first fixed plate 10 to the outside of the protective shell 3, then the first fixed plate 10 on the support leg 12 on the sliding wheel is rotated to the vertical state, so that the pulley wheel is in contact with the ground, ensures the stability of the first fixed plate 10 movement, and facilitates the subsequent electrical quick installation on the first fixed plate 10, by setting up the door plate 5, fixed gear ring 8 and reinforcing rib column 9, the door plate 5 is fixed on the protective shell 3, by inserting the tool into the polygonal slot 19, drive the driving gear 7 on the fixed shaft 6 rotates, the driving gear 7 can drive the fixed gear ring 8 to rotate, so that the reinforcing rib column 9 on the fixed gear ring 8 is fixed on the protective shell 3, so that the door plate 5 cannot be opened under the condition that the reinforcing rib column 9 does not rotate and separate from the protective shell 3, improves the safety of fixed, and the password lock 11 can protect the polygonal slot 19 on the fixed shaft 6, further improves the safety of fixed, by setting up the cooling mechanism 2, open the air suction pump 21, can the outside air is sucked into the air inlet shell 201 inside, filter screen 202 can the dust in the air is preliminary filtered, the filtered air through the hollow shell 22, heat exchange pipe 25 and exhaust pipe 24 into the protective shell 3, open the water suction pump 14, the water in the water storage shell 1 inside is sprayed to the outer wall of heat exchange pipe 25 through the output pipe 15 and the liquid jet pipe 20 on the liquid jet nozzle, can the air on the heat exchange pipe 25 is cooled, open the air suction fan 204, can the outside air is sucked into the air inlet shell 201 inside, to the water vapor on the outer wall of heat exchange pipe 25 is evaporated quickly, thereby reducing the temperature of the air inside heat exchange pipe 25, since the air outlet groove 28 on the arc hollow shell 23 sprays air, can drive the exhaust pipe 24 to rotate, so that the liquid jet nozzle can spray the spray evenly on the outer wall of heat exchange pipe 25, ensures the cooling effect.

Claims

1. A protection device for rooms and substations UPS, comprising a protective casing (3), characterized by, Also include; The cooling mechanism (2) is used for cooling the electricity inside the protective shell (3), the cooling mechanism (2) includes the air inlet shell (201) fixed on one side of the outer wall of the protective shell (3), and one end of the outer wall of the air inlet shell (201) is inserted with a fixed cylinder (203), the inner wall of the fixed cylinder (203) is provided with an air exhaust fan (204), and the top outer wall of the air inlet shell (201) is provided with a plurality of air outlet holes which are distributed at equal distances; The fixing mechanism, one end of the outer wall of the protective shell (3) is provided with an opening, and the inner wall of one side of the opening is hinged with a door plate (5), one end of the outer wall of the door plate (5) is rotatably connected with a fixed gear ring (8) through a bearing, and the outer wall of one end of the fixed gear ring (8) is provided with a reinforcing rib column (9), and the top outer wall of the protective shell (3) is provided with a plurality of exhaust grooves (4) which are distributed at equal distances; The first fixed plate (10) is used for fixed installation of electricity, the bottom inner wall of the protective shell (3) is provided with a rectangular groove on both sides, and the same screw rod (17) is rotatably connected with the inner wall of both ends of the rectangular groove, and the other rectangular groove is provided with the same limiting rod (18) on both ends of the inner wall, the circumferential outer wall of the screw rod (17) is rotatably connected with the first sliding block through the thread, the outer wall of the limiting rod (18) is slidably connected with the second sliding block, and the top outer wall of the second sliding block and the first sliding block is fixedly connected with the bottom outer wall of the first fixed plate (10); The outer wall of one side of the air inlet shell (201) is provided with a circular groove, and the inner wall of the circular groove is fixedly connected with a filter screen (202), and the inner wall of the air inlet shell (201) is provided with a hollow shell (22) on both sides, the outer wall of one side of the two hollow shells (22) is provided with an opening, and the inner wall of the opening is rotatably connected with a second fixed plate (27) through a bearing, and the outer wall of one side of the two second fixed plates (27) is inserted with a plurality of heat exchange pipes (25) which are distributed at equal distances; The outer wall of one side of the hollow shell (22) close to the filter screen (202) is provided with an air pump (21), and the output air pipe of the air pump (21) extends into the corresponding hollow shell (22); The outer wall of one side of the hollow shell (22) away from the air pump (21) is rotatably connected with an exhaust pipe (24) through a bearing, the circumferential outer wall of the exhaust pipe (24) is provided with a plurality of arc hollow shells (23) which are distributed at equal distances, and the outer wall of one end of the arc hollow shell (23) is provided with a plurality of air outlet grooves (28) which are distributed at equal distances, and the connecting part of the arc hollow shell (23) and the exhaust pipe (24) is provided with a ventilation groove, and the connecting part of the air inlet shell (201) and the protective shell (3) is provided with a plurality of communication grooves which are distributed at equal distances.

2. The protection device for UPS of machine room and substation according to claim 1, characterized in that: The outer wall of both sides of the bottom of the first fixed plate (10) is provided with a mounting groove (16), and the inner wall of one end of the mounting groove (16) is hinged with a supporting leg (12), one end of the supporting leg (12) is provided with a sliding wheel, one end of the screw rod (17) extends to the outside of the protective shell (3), and one end of the outer wall of the screw rod (17) is provided with a detachable hand wheel.

3. The protection device for UPS of machine room and substation according to claim 1, characterized in that: The outer wall of one end of the door plate (5) is rotatably connected with a fixed shaft (6) through a bearing, and the outer wall of one end of the fixed shaft (6) is sleeved with a driving gear (7), the driving gear (7) is engaged with a fixed gear ring (8), the outer wall of one end of the fixed shaft (6) is provided with a polygonal slot (19), the outer wall of one end of the door plate (5) is hingedly connected with a password lock (11), and the password lock (11) is located outside the fixed shaft (6).

4. The protection device for UPS of machine room and substation according to claim 1, characterized in that: The bottom outer wall of the air inlet shell (201) is inserted with a backwater pipe (26), the bottom outer wall of the protection shell (3) is provided with a water storage shell (1), and the bottom of the backwater pipe (26) extends into the water storage shell (1).

5. The protection device for UPS of machine room and substation according to claim 4, characterized in that: The bottom outer wall of the water storage shell (1) is provided with a water pump (14) on one side, and the input end of the water pump (14) is provided with an input pipe, and the other end of the input pipe extends into the water storage shell (1), the output end of the water pump (14) is provided with an output pipe (15), the other end of the output pipe (15) extends into the air inlet shell (201), and the top outer wall of the water storage shell (1) is inserted with a water adding pipe on one side.

6. The protection device for a computer room and substation UPS according to claim 5, characterized in that: The bottom outer wall of the protection shell (3) is provided with wheels (13) at four corners, and the other end of the output pipe (15) is provided with a liquid spraying pipe (20), and the outer wall of the bottom of the liquid spraying pipe (20) is provided with liquid spraying nozzles distributed at equal distances.

Images