Silent reciprocating piston type compressor

Abstract

The invention discloses a mute reciprocating piston type compressor, and relates to the technical field of reciprocating piston type compressors, the mute reciprocating piston type compressor comprises a supporting frame, transverse plates are fixedly connected to the positions, close to the bottom, of the left side and the right side of the supporting frame, and rubber damping pads are attached to the tops of the transverse plates; two first threaded holes are formed in the positions, close to the left side and the right side, of the top of the rubber anti-vibration pad, a crane transports the rubber anti-vibration pad to the top of the supporting frame through the fixing ring, the rubber anti-vibration pad drives the compressor body to move through the clamping plates, and when the rubber anti-vibration pad is transported to the top of the supporting frame, the compressor body moves. During installation, the vertical holes in the rubber anti-vibration pad are aligned with the adjacent threaded rods, the first nuts are taken out, the first nuts are rotated to the surfaces of the threaded rods in a threaded mode, the first nuts are located at the top of the rubber anti-vibration pad, and therefore installation of the rubber anti-vibration pad is completed. Through cooperation of a supporting frame, a first spring, a threaded rod, a first nut and a rubber anti-vibration pad, vibration can be prevented from being transmitted to a building structure when the compressor body works, and therefore low-frequency solid sound transmission is reduced.

Description

Technical Field

[0001] This invention relates to the field of reciprocating piston compressor technology, specifically a silent reciprocating piston compressor. Background Technology

[0002] A reciprocating compressor is a positive displacement compressor that uses one or more pistons that reciprocate to change the volume inside the compression chamber. Reciprocating compressors are mainly piston-type air compressors.

[0003] However, there are some problems in the use of reciprocating compressors. Existing reciprocating compressors will generate a lot of noise during use, and the existing technology is not good at noise reduction. Over time, this may affect the hearing of operators. At the same time, it is not convenient to install and disassemble the reciprocating compressor, which reduces the working efficiency of the device. Moreover, the reciprocating compressor is connected to the wiring during use. If the wiring is not tidied up, it may become tangled and cause a short circuit. Summary of the Invention

[0004] In view of the above-mentioned shortcomings of the existing technology, the purpose of this invention is to provide a silent reciprocating piston compressor.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a silent reciprocating piston compressor, comprising a support frame, with horizontal plates fixedly connected to the left and right sides near the bottom of the support frame, rubber vibration damping pads attached to the top of the horizontal plates, two first threaded holes opened on the top of the rubber vibration damping pads near the left and right sides, and clamping plates attached to the top of the rubber vibration damping pads near the front and rear sides, each clamping plate having two second threaded holes, bolts threaded into the second threaded holes, the bottom ends of the bolts threaded into the first threaded holes, the compressor body being housed in the inner cavity of the two clamping plates, four fixing rings fixedly connected to the top of the rubber vibration damping pads near the outer edge, two through holes opened on the top of the rubber vibration damping pads near the front and rear sides, two blind holes opened on the top of the support frame near the front and rear sides, sound-insulating L-shaped plates provided on the top of the horizontal plates, each sound-insulating L-shaped plate having a first hinge on one side, the sound-insulating L-shaped plates being movably connected to one side of the horizontal plates via the hinges, and adjacent sound-insulating L-shaped plates being fitted together.

[0006] Preferably, the support frame is fixedly connected to a connecting plate near the front and rear sides at the top. The connecting plate is provided with connecting columns on both the left and right sides. A rotating plate is inserted into the top of each connecting column. A connecting hole is opened on each rotating plate. Two ropes are fixedly connected to the top of each connecting plate. A fixing plate is fixedly connected to the end of each rope away from the connecting plate. A plug is fixedly connected to the bottom of each fixing plate. The bottom end of the plug passes through the connecting hole and the through hole and is inserted into the blind hole.

[0007] Preferably, the bottom of the inner cavity of the support frame is provided with a base plate, the top of the support frame is provided with limit holes near the four corners, the top of the rubber damping pad is provided with vertical holes near the four corners, the top of the base plate is fixedly connected with threaded rods near the four corners, the top of the threaded rods passes through adjacent limit holes and vertical holes, the outer edge of the threaded rods is threaded with a first nut near the top, the first nut is located on the top of the rubber damping pad, and a number of first springs are fixedly connected to the top of the base plate, some of the first springs are sleeved on the outer edge of the threaded rods, and the tops of the first springs are fixedly connected to the top of the inner cavity of the support frame.

[0008] Preferably, each of the soundproof L-shaped plates is fixedly connected to a fixing plate at its top. Each fixing plate has two adjustment holes, and the inner cavities of two adjacent adjustment holes are interconnected. A threaded U-shaped rod is threaded through each adjustment hole, and two second nuts are threadedly connected to the outer edge of the threaded U-shaped rod near the left side.

[0009] Preferably, soundproof movable panels are attached to both the front and rear sides of the soundproof L-shaped panel. Two second hinges are provided on one side of each soundproof movable panel. The soundproof movable panels are movably connected to one side of the soundproof L-shaped panel via the second hinges. The corresponding sides of two adjacent soundproof movable panels are fitted together. Fixed tubes are fixedly connected to the top of the soundproof L-shaped panel near both sides. Rotating rods are passed through the inner cavities of the fixed tubes. Support blocks are fixedly connected to the top of each soundproof L-shaped panel. Motors are fixedly connected to the top of each support block. Transmission rods are fixedly connected to the power output shafts of each motor. A first bevel gear is fixedly connected to the end of each transmission rod away from the motor. Second bevel gears mesh with the front and rear sides of each first bevel gear. A crossbar is fixedly connected to the side of each second bevel gear near the rotating rod. A limiting plate is fixedly connected to the end of each crossbar away from the second bevel gear. The side of the limiting plate away from the crossbar is fixedly connected to one end of the rotating rod. A baffle is fixedly connected to the end of each rotating rod away from the limiting plate. The baffle is located on the side of the soundproof movable panel away from the soundproof L-shaped panel.

[0010] Preferably, the compressor body has limiting blocks on both the left and right sides, each limiting block has four through slots, and each limiting block has three L-shaped rods fixedly connected to its bottom. The end of each L-shaped rod away from the limiting block is fixedly connected to one side of an adjacent sound-insulating L-shaped plate. Each limiting block has limiting plates fixedly connected to its front and rear sides near the bottom. Each limiting plate has two second springs fixedly connected to its top. Each limiting block has a top plate attached to its top, and the top ends of the second springs are fixedly connected to the bottom of the top plate. Each limiting block has four flexible hoses fixedly connected to its side away from the compressor body.

[0011] Preferably, the sound-insulating L-shaped plate has four slots on the side away from the compressor body. The end of the hose away from the limiting block passes through the adjacent slots. The top of the hose is open. Each slot has a swing plate. The swing plate is located in the adjacent hose. Each swing plate has a third hinge on the side away from the compressor body. The swing plate is movably connected to one side of the sound-insulating L-shaped plate through the third hinge.

[0012] Compared with the prior art, the beneficial effects of the present invention are: This invention utilizes the interplay between the compressor body, sound-insulating L-shaped plate, rubber vibration damping pad, motor, and other structures. A crane can transport the rubber vibration damping pad to the top of the support frame via a fixing ring. The rubber vibration damping pad then moves the compressor body via a clamping plate. A rotating plate is adjusted to rotate to the top of the rubber vibration damping pad. A rope is pulled, and a rod is inserted into the top of the support frame. When the rubber vibration damping pad reaches the top of the support frame, the vertical hole on the rubber vibration damping pad is aligned with the adjacent threaded rod. The first nut is then removed and its threads are rotated onto the surface of the threaded rod. The first nut is positioned on top of the rubber vibration damping pad, thus completing the installation of the rubber vibration damping pad. The cooperation of the support frame, first spring, threaded rod, first nut, and rubber vibration damping pad effectively blocks vibration transmission to the building structure when the compressor body is operating, thereby reducing low-frequency solid-borne sound. When it is necessary to organize the wiring of the compressor body, pass one end of the wire through the slot on the limit block and into the inside of the hose. The top plate, together with the second spring, can limit the top of the limit block, while the L-shaped rod supports and limits the limit block. Pass one end of the wire through the slot on the sound insulation L-shaped plate and drive the swing plate to swing outward, and connect the wire to other equipment. When sound insulation is required on the compressor body, the L-shaped sound insulation plate is swung, which in turn causes the movable sound insulation plate to swing. The L-shaped and movable sound insulation plates cover the compressor body, while the baffle limits the movement of the movable sound insulation plate. When the movable sound insulation plate needs to be opened, the motor is started. The motor drives the transmission rod to rotate, which in turn drives the first bevel gear to rotate. The first bevel gear drives the second bevel gear to rotate, which in turn drives the baffle to rotate, thus moving the baffle away from one side of the movable sound insulation plate, allowing the movable sound insulation plate to be flipped open. Attached Figure Description

[0013] Figure 1 This is a perspective view of the present invention; Figure 2 This is a bottom-view perspective view of the present invention; Figure 3 This is a schematic diagram of the compressor body structure of the component of the present invention; Figure 4 This is a front view of the component support frame of the present invention; Figure 5This is an exploded view of the component support frame of the present invention; Figure 6 This is a schematic diagram of the rubber vibration damping pad structure of the component of the present invention; Figure 7 This is a schematic diagram of the rotating plate structure of the component of the present invention; Figure 8 This is a schematic diagram of the base plate structure of the component of the present invention; Figure 9 This is a schematic diagram of the first sound-insulating L-shaped plate structure of the component of the present invention; Figure 10 This is a schematic diagram of the component fixing plate structure of the present invention; Figure 11 This is a schematic diagram of the motor structure of the component of the present invention; Figure 12 This is a schematic diagram of the baffle structure of the component of the present invention; Figure 13 This is a schematic diagram of the hose structure of the component of the present invention; Figure 14 This is a side view of the limiting block of the component of the present invention.

[0014] The following are the labeling elements in the diagram: 1. Soundproof L-shaped panel; 2. Soundproof movable panel; 3. Baffle; 4. Fixing plate; 5. Fixing pipe; 6. Flexible hose; 7. Support frame; 8. Horizontal plate; 9. Base plate; 10. First spring; 11. Rubber vibration damping pad; 12. Clamping plate; 13. Compressor body; 14. Fixing ring; 15. Bolt; 16. Connecting column; 17. Rotating plate; 18. Fixing disc; 19. Insert rod; 20. Second spring; 21. Rope; 22. Connecting plate; 23. Threaded rod; 24. First nut; 25. Threaded U-shaped rod; 26. Second nut; 27. Motor; 28. Support block; 29. ​​Transmission rod; 30. First bevel gear; 31. Second bevel gear; 32. Horizontal bar; 33. Limiting disc; 34. Swinging plate; 35. Rotating rod; 36. Limiting block; 37. L-shaped rod; 38. Top plate; 39. Limiting plate. Detailed Implementation

[0015] Please see Figure 1-14This invention provides a technical solution: a silent reciprocating piston compressor, including a support frame 7. Horizontal plates 8 are fixedly connected to the left and right sides of the support frame 7 near the bottom. Rubber vibration damping pads 11 are attached to the top of the horizontal plates 8. Two first threaded holes are opened on the top of each rubber vibration damping pad 11 near the left and right sides. Clamping plates 12 are attached to the top of each rubber vibration damping pad 11 near the front and rear sides. Two second threaded holes are opened on each clamping plate 12. Bolts 15 are threaded into each of the second threaded holes, with the bottom end of the bolts 15 threaded into the first threaded holes. The compressor body 13 is housed within the inner cavity of the two clamping plates 12. The rubber vibration damping... Four fixing rings 14 are fixedly connected to the top of the pad 11 near the outer edge. Two through holes are opened on the top of the rubber vibration damping pad 11 near the front and rear sides. Two blind holes are opened on the top of the support frame 7 near the front and rear sides. The top of the horizontal plate 8 is equipped with a sound-insulating L-shaped plate 1. A first hinge is provided on one side of the sound-insulating L-shaped plate 1. The sound-insulating L-shaped plate 1 is movably connected to one side of the horizontal plate 8 through the hinge. Two adjacent sound-insulating L-shaped plates 1 are fitted together. Connecting plates 22 are fixedly connected to the top of the support frame 7 near the front and rear sides. Connecting posts 16 are provided on the left and right sides of the connecting plate 22. A rotating plate 17 is inserted into the top of each connecting post 16. Each rotating plate 17 has a connecting hole. Two ropes 21 are fixedly connected to the top of each connecting plate 22. A fixed plate 18 is fixedly connected to the end of each rope 21 away from the connecting plate 22. A rod 19 is fixedly connected to the bottom of each fixed plate 18. The bottom end of the rod 19 passes through the connecting hole and the through hole and is inserted into the blind hole. A base plate 9 is provided at the bottom of the inner cavity of the support frame 7. Limiting holes are provided near the four corners of the top of the support frame 7. Vertical holes are provided near the four corners of the top of the rubber vibration damping pad 11. Threaded rods 23 are fixedly connected near the four corners of the top of the base plate 9. The top of the threaded rod 23 passes through the adjacent limiting hole and the vertical hole. The outer side of the threaded rod 23... The edges near the top are all threaded with first nuts 24, which are located on the top of the rubber damping pad 11. Several first springs 10 are fixedly connected to the top of the base plate 9. Some of the first springs 10 are sleeved on the outer edge of the threaded rod 23. The top of the first springs 10 are all fixedly connected to the top of the inner cavity of the support frame 7. The top of the sound insulation L-shaped plate 1 is fixedly connected with a fixing plate 4. Each fixing plate 4 has two adjustment holes. The inner cavities of two adjacent adjustment holes are interconnected. A threaded U-shaped rod 25 is threaded through the adjustment holes. Two second nuts 26 are threadedly connected to the outer edge of the threaded U-shaped rod 25 near the left side. Soundproof movable panels 2 are attached to both the front and rear sides of the soundproof L-shaped panel 1. Two second hinges are provided on one side of each soundproof movable panel 2, allowing them to be movably connected to one side of the soundproof L-shaped panel 1. The corresponding sides of two adjacent soundproof movable panels 2 are fitted together. Fixed tubes 5 are fixedly connected to the top of the soundproof L-shaped panel 1 near both sides. Rotating rods 35 pass through the inner cavity of each fixed tube 5. Support blocks 28 are fixedly connected to the top of each soundproof L-shaped panel 1, and motors 27 are fixedly connected to the top of each support block 28. The motors 27 have a power output shaft. Each component is fixedly connected to a transmission rod 29. A first bevel gear 30 is fixedly connected to the end of each transmission rod 29 away from the motor 27. Second bevel gears 31 mesh with the front and rear sides of the first bevel gear 30. A crossbar 32 is fixedly connected to the side of each second bevel gear 31 near the rotating rod 35. A limit plate 33 is fixedly connected to the end of each crossbar 32 away from the second bevel gear 31. The limit plate 33 is fixedly connected to one end of the rotating rod 35 on the side away from the crossbar 32. A baffle 3 is fixedly connected to the end of the rotating rod 35 away from the limit plate 33. Located on the side of the soundproof movable panel 2 away from the soundproof L-shaped panel 1, the compressor body 13 has limiting blocks 36 on both the left and right sides. Each limiting block 36 has four through slots. Three L-shaped rods 37 are fixedly connected to the bottom of each limiting block 36. The end of each L-shaped rod 37 away from the limiting block 36 is fixedly connected to the side of the adjacent soundproof L-shaped panel 1. Limiting plates 39 are fixedly connected to the front and rear sides of the limiting block 36 near the bottom. Two second springs 20 are fixedly connected to the top of each limiting plate 39. A top plate 38 is attached to the top of each limiting block 36. The ends are fixedly connected to the bottom of the top plate 38. Four hoses 6 are fixedly connected to the side of the limiting block 36 away from the compressor body 13. Four slots are opened on the side of the sound insulation L-shaped plate 1 away from the compressor body 13. The end of the hose 6 away from the limiting block 36 passes through the adjacent slot. The top of the hose 6 is open. A swing plate 34 is provided in each slot. The swing plate 34 is located in the adjacent hose 6. A third hinge is provided on the side of the swing plate 34 away from the compressor body 13. The swing plate 34 is movably connected to one side of the sound insulation L-shaped plate 1 through the third hinge.

[0016] Working principle: When the device starts working, the crane transports the rubber vibration damping pad 11 to the top of the support frame 7 via the fixing ring 14. The rubber vibration damping pad 11 drives the compressor body 13 to move via the clamping plate 12, thereby installing the compressor body 13. Then, the rotating plate 17 is adjusted to rotate to the top of the rubber vibration damping pad 11. The rope 21 is pulled, and the rope 21 drives the fixing plate 18 and the insertion rod 19 to move. The insertion rod 19 passes through the rotating plate 17 and the rubber vibration damping pad 11 and is inserted into the top of the support frame 7. When the rubber vibration damping pad 11 is transported to the top of the support frame 7, the vertical hole on the rubber vibration damping pad 11 is aligned with the adjacent screw. The threaded rod 23 is removed, and the first nut 24 is screwed onto the surface of the threaded rod 23. The first nut 24 is located on top of the rubber vibration damping pad 11, thus completing the installation of the rubber vibration damping pad 11. Through the cooperation of the support frame 7, the first spring 10, the threaded rod 23, the first nut 24, and the rubber vibration damping pad 11, the vibration transmitted to the building structure can be blocked when the compressor body 13 is working, thereby reducing low-frequency solid-borne sound. When it is necessary to tidy up the wiring of the compressor body 13, one end of the wiring is passed through the through groove on the limiting block 36 and into the inside of the hose 6. The top plate 38, in conjunction with the second spring 20, can restrain the top of the limiting block 36. The L-shaped rod 37 supports and limits the limiting block 36. One end of the line passes through the slot on the soundproof L-shaped plate 1 and drives the swing plate 34 to swing outward, connecting the line to other equipment. When soundproofing is required for the compressor body 13, the soundproof L-shaped plate 1 is swung, causing the soundproof movable plate 2 to swing. The soundproof L-shaped plate 1 and the soundproof movable plate 2 cover the compressor body 13. The threaded U-shaped rod 25 is taken out and passed through the fixed plate 4. The threaded U-shaped rod 25 is limited by the second nut 26, thereby installing the two soundproof L-shaped plates 1 to prevent soundproofing. If the L-shaped plate 1 becomes loose, the baffle 3 can limit the soundproof movable plate 2. When it is necessary to open the soundproof movable plate 2, the motor 27 is started. The motor 27 drives the transmission rod 29 to rotate, the transmission rod 29 drives the first bevel gear 30 to rotate, the first bevel gear 30 drives the second bevel gear 31 to rotate, the second bevel gear 31 drives the crossbar 32 to rotate, the crossbar 32 drives the limiting plate 33 to rotate, the limiting plate 33 drives the rotating rod 35 to rotate, and the rotating rod 35 drives the baffle 3 to rotate, thereby moving the baffle 3 out from one side of the soundproof movable plate 2, so that the soundproof movable plate 2 can be flipped open.

Claims

1. A silent reciprocating piston compressor comprising a support frame (7), characterized in that: The support frame (7) is fixedly connected with the horizontal plate (8) at the left and right sides near the bottom, the top of the horizontal plate (8) is matched with the rubber damping pad (11), two first threaded holes are formed in the top of the rubber damping pad (11) near the left and right sides, the rubber damping pad (11) is matched with the clamping plate (12) at the top near the front and back sides, two second threaded holes are formed in the clamping plate (12), bolts (15) are threadedly connected in the second threaded holes, the bottom ends of the bolts (15) are threadedly connected in the first threaded holes, the inner cavities of the two clamping plates (12) are commonly provided with the compressor body (13), four fixed rings (14) are fixedly connected to the top of the rubber damping pad (11) near the outer side edges, two through holes are formed in the top of the rubber damping pad (11) near the front and back sides, two blind holes are formed in the top of the support frame (7) near the front and back sides, the top of the horizontal plate (8) is provided with the sound insulation L-shaped plate (1), the sound insulation L-shaped plate (1) is provided with the first hinge on one side, the sound insulation L-shaped plate (1) is movably connected to the horizontal plate (8) through the hinge, and adjacent two sound insulation L-shaped plates (1) are matched with each other.

2. A silent reciprocating piston compressor according to claim 1, characterized in that: The top of the support frame (7) is fixedly connected with the connecting plate (22) near the front and back sides, the left and right sides of the connecting plate (22) are provided with the connecting column (16), the top ends of the connecting columns (16) are inserted with the rotating plate (17), the rotating plate (17) is provided with the connecting hole, the top of the connecting plate (22) is fixedly connected with the two ropes (21), the ends, away from the connecting plate (22), of the ropes (21) are fixedly connected with the fixed disc (18), the bottom of the fixed disc (18) is fixedly connected with the inserting rod (19), the bottom end of the inserting rod (19) penetrates through the connecting hole and the through hole and is inserted into the blind hole.

3. A silent reciprocating piston compressor according to claim 2, characterized in that: The inner cavity of the support frame (7) is provided with the bottom plate (9), the top of the support frame (7) is provided with the limiting hole near the four corners, the top of the rubber damping pad (11) is provided with the vertical hole near the four corners, the top of the bottom plate (9) is fixedly connected with the threaded rod (23) near the four corners, the top end of the threaded rod (23) penetrates through the adjacent limiting hole and vertical hole, the outer side edge of the threaded rod (23) is threadedly connected with the first nut (24) near the top, the first nut (24) is located on the top of the rubber damping pad (11), the top of the bottom plate (9) is fixedly connected with the first spring (10), part of the first spring (10) is sleeved on the outer side edge of the threaded rod (23), and the top ends of the first springs (10) are fixedly connected to the top of the inner cavity of the support frame (7).

4. A silent reciprocating piston compressor according to claim 3, characterized in that: The top of the sound insulation L-shaped plate (1) is fixedly connected with the fixed plate (4), the fixed plate (4) is provided with the two adjusting holes, the inner cavities of the two adjusting holes are communicated with each other, the adjusting holes are commonly provided with the threaded U-shaped rod (25), and the outer side edge of the threaded U-shaped rod (25) is threadedly connected with the two second nuts (26) near the left side.

5. A silent reciprocating piston compressor according to claim 4, characterized in that: The sound insulation L-shaped plate (1) is provided with sound insulation movable plates (2) on both sides, one side of the sound insulation movable plate (2) is provided with two second hinges, the sound insulation movable plate (2) is movably connected with one side of the sound insulation L-shaped plate (1) through the second hinge, the corresponding side of the adjacent two sound insulation movable plates (2) is provided with each other, the sound insulation L-shaped plate (1) is provided with fixed pipes (5) near both sides on the top, the fixed pipe (5) is provided with rotating rods (35) in the cavity, the sound insulation L-shaped plate (1) is provided with support blocks (28) on the top, the support block (28) is provided with motors (27) on the top, the motor (27) is provided with transmission rods (29) on the power output shaft, the first umbrella-shaped gear (30) is fixedly connected to the end of the transmission rod (29) away from the motor (27), the first umbrella-shaped gear (30) is provided with second umbrella-shaped gears (31) on both sides, the second umbrella-shaped gear (31) is fixedly connected with a cross rod (32) on the side close to the rotating rod (35), the cross rod (32) is fixedly connected with a limiting disc (33) on the end away from the second umbrella-shaped gear (31), the limiting disc (33) is fixedly connected to one end of the rotating rod (35) on the side away from the cross rod (32), the rotating rod (35) is fixedly connected with a baffle (3) on the end away from the limiting disc (33), and the baffle (3) is located on the side of the sound insulation movable plate (2) away from the sound insulation L-shaped plate (1).

6. A silent reciprocating piston compressor according to claim 5, characterized in that: The compressor body (13) is provided with limiting blocks (36) on both sides, four through slots are formed in the limiting block (36), three L-shaped rods (37) are fixedly connected to the bottom of the limiting block (36), the L-shaped rod (37) is fixedly connected to the side of the adjacent sound insulation L-shaped plate (1) on the end away from the limiting block (36), the limiting plate (39) is fixedly connected to the bottom of the limiting block (36) on both sides, the second spring (20) is fixedly connected to the top of the limiting plate (39), the top plate (38) is fixedly connected to the top of the limiting block (36), the second spring (20) is fixedly connected to the bottom of the top plate (38), and four hoses (6) are fixedly connected to the side of the limiting block (36) away from the compressor body (13).

7. A silent reciprocating piston compressor according to claim 6, characterized in that: The sound insulation L-shaped plate (1) is provided with four grooves on the side away from the compressor body (13), the end of the hose (6) away from the limiting block (36) penetrates the adjacent groove, the top of the hose (6) is provided with an opening, the groove is provided with a swing plate (34), the swing plate (34) is located in the adjacent hose (6), the swing plate (34) is provided with a third hinge on the side away from the compressor body (13), and the swing plate (34) is movably connected with one side of the sound insulation L-shaped plate (1) through the third hinge.

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