Multifunctional ceiling type gas disinfection, deodorization and purification device

Abstract

The invention relates to the technical field of purifiers, and particularly discloses a multifunctional ceiling type gas disinfection, deodorization and purification device which comprises a purification pipeline, an ultraviolet sterilization lamp is arranged on the top wall of the purification pipeline, and a tubular plasma generator is arranged on the bottom wall of the purification pipeline. An activated carbon plate is slidably mounted on one side of the purification pipeline in a penetrating manner, and a positive and negative rotation fan is arranged in the purification pipeline; the pre-storage box is arranged on the side wall of the purification pipeline, one end of the pre-storage box and the side, close to the purification pipeline, of the pre-storage box are open, a door plate is arranged at an opening in the end of the pre-storage box, and two limiting rails are arranged on the inner wall of the side, away from the purification pipeline, of the pre-storage box. The device has the function of purifying various types of air, improves the gas purification effect, has the function of automatically replacing the activated carbon plate, has the function of automatically cleaning an air filtering opening in the device, and reduces the labor cost.

Description

Technical Field

[0001] The invention relates to the technical field of purifiers, and in particular to a multifunctional ceiling-mounted gas disinfection, deodorization and purification device. Background Art

[0002] A farm is a place dedicated to raising and managing livestock, poultry or other economic animals. Its main function is to provide animals with a suitable living environment to promote their healthy growth and reproduction. Farms can be divided into many types, including meat farms, dairy farms, fish farms and poultry farms, and farm air purification is an important part of modern farming. Its purpose is to improve the air quality in the farm through various technical means, so as to ensure the healthy growth of animals and reduce the occurrence of diseases.

[0003] During use, the existing ceiling-mounted gas purification device generally uses a fixed activated carbon plate in conjunction with a sterilization lamp to purify the air, resulting in an insufficient purification effect. In addition, the activated carbon plate needs to be replaced manually on a regular basis, and the air inlet filter of the purification device needs to be cleaned, resulting in high labor costs. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a multifunctional ceiling-mounted gas disinfection, deodorization and purification device, which can solve the problems raised in the above background technology.

[0005] The purpose of the present invention can be achieved through the following technical solutions: A multifunctional ceiling-mounted gas disinfection, deodorization and purification device, comprising: A purification pipeline, wherein an ultraviolet sterilization lamp is arranged on the top wall of the purification pipeline, a tubular plasma generator is arranged on the bottom wall of the purification pipeline, an activated carbon plate is penetrated and slidably installed on one side of the purification pipeline, and a forward and reverse blower is arranged in the purification pipeline; A pre-storage box, the pre-storage box is arranged on the side wall of the purification pipe, one end of the pre-storage box and the side close to the purification pipe are both open, a door panel is arranged at the open end of the pre-storage box, two limit rails are arranged on the inner wall of the side of the pre-storage box away from the purification pipe, the middle part of the limit rails is truncated, a push-pull plate is penetrated and slidably installed at the bottom end of the pre-storage box, and a pneumatic cylinder is arranged at the end of the pre-storage box away from the door panel, and the pneumatic cylinder is used to drive the activated carbon plate to slide; Atomizing device, the atomizing device comprises a tubular atomizing nozzle and a liquid storage tank, the tubular atomizing nozzle is installed on the top wall of the purification pipeline, and the liquid storage tank is used to store the diluted deodorant; A filter device, the filter device comprising an air inlet pipe, the air inlet pipe is installed at one end of the purification pipeline away from the atomizing device, a support ring is provided on the inner wall of the air inlet pipe, and a filter is provided on the side of the support ring away from the atomizing device; The filter device also includes a rotating shaft, which is rotatably mounted on the inner wall of the air inlet pipe through a plate body, and a plurality of brushes are arranged at one end of the rotating shaft close to the support ring, and the brushes are used to clean the filter screen; The transmission assembly is used to drive the push-pull plate to slide and the rotating shaft to rotate.

[0006] Preferably, the width of the push-pull plate matches the cut-off length of the limit rail, two transition rails are provided on the side of the push-pull plate close to the purification pipe, a through hole for the activated carbon plate to enter and exit is provided on one side of the purification pipe, and a flexible coating is provided on the through hole wall of the purification pipe.

[0007] Preferably, the side wall of the activated carbon plate is provided with a limiting hole, and the transition rail and the door panel are matched with the limiting hole.

[0008] Preferably, a limiting groove matching the push-pull plate is provided at the bottom end of the pre-storage box, a cross bar is provided in the limiting groove of the pre-storage box, and the push-pull plate and the cross bar are penetrated and slidably connected.

[0009] Preferably, the atomizing device further comprises a liquid pumping assembly, the liquid pumping assembly comprises a high-pressure water pump, a drainage pipe is provided between the liquid outlet of the liquid storage tank and the liquid inlet of the tubular atomizing nozzle, and the high-pressure water pump is installed on the side wall of the drainage pipe.

[0010] Preferably, the transmission assembly includes a screw, which is rotatably installed at the bottom end of the purification pipe, and the screw is rotatably connected to the push-pull plate. A transmission rod passes through and is rotatably installed on the side wall of the air inlet pipe. The transmission rod is arranged in parallel with the screw, and one end of the screw and the transmission rod are aligned. A gear set is arranged between the transmission rod and the rotating shaft, and a first pulley and a second pulley are respectively arranged at the aligned ends of the screw and the transmission rod, and a synchronous belt is arranged between the first pulley and the second pulley.

[0011] Preferably, the gear set includes two bevel gears that are vertically distributed and mesh with each other, and the two bevel gears of the gear set are respectively mounted on the ends of the transmission rod and the rotating shaft.

[0012] Preferably, the transmission assembly further comprises a servo motor, an L-shaped plate is provided on the side of the pre-storage box away from the purification pipe, the servo motor is fixedly mounted on the side wall of the L-shaped plate, and the output shaft of the servo motor is fixedly connected to the screw via a coupling.

[0013] Preferably, a ventilation plate is provided at one end of the purification duct away from the filtering device, and the filtering device, the forward and reverse rotating blower, the activated carbon plate, the plasma generator and the ventilation plate are arranged in sequence in the purification duct.

[0014] Preferably, the top wall and the bottom wall of the purification pipe are each provided with two limit blocks, and the activated carbon plate is slidably installed between the four limit blocks.

[0015] The beneficial effects of the present invention are: 1. A purification pipeline is provided, an ultraviolet sterilization lamp is provided on the top wall of the purification pipeline, a tubular plasma generator is provided on the bottom wall of the purification pipeline, an activated carbon plate is penetrated and slidably installed on one side of the purification pipeline, a forward and reverse blower is provided in the purification pipeline, an atomization device includes a tubular atomization nozzle and a liquid storage tank, the tubular atomization nozzle is installed on the top wall of the purification pipeline, the liquid storage tank is used to store the diluted deodorant, the filtering device includes an air inlet pipe, the air inlet pipe is installed at one end of the purification pipeline away from the atomization device, a support ring is provided on the inner wall of the air inlet pipe, and a filter is provided on the side of the support ring away from the atomization device; The beneficial effects that can be obtained are: the forward and reverse rotation of the fans draws the air in the farm, and the air flows through the filter device, the activated carbon plate and the atomizer device in sequence. At the same time, the filter screen filters the large particles of impurities in the air, the activated carbon plate absorbs the harmful gases in the airflow, and purifies the air. The high-pressure water pump cooperates with the drainage pipe to draw the deodorizing liquid in the liquid storage tank to the tubular atomizer nozzle to deodorize and sterilize the air. The ultraviolet sterilization lamp sterilizes the air. The tubular plasma generator ionizes the gas to generate high-energy plasma, which reacts with pollutants such as bacteria, viruses, bacterial spores, pollen, smoke, odor, etc. in the air and decomposes them into harmless or low-toxic substances, such as water and carbon dioxide. It has the function of purifying multiple types of air and improves the gas purification effect.

[0016] 2. A pre-storage box is provided, which is arranged on the side wall of the purification pipe. One end of the pre-storage box and the side close to the purification pipe are both open. A door panel is provided at the open end of the pre-storage box. Two limit rails are provided on the inner wall of the side of the pre-storage box away from the purification pipe. The middle part of the limit rails is cut off. A push-pull plate is penetrated and slidably installed at the bottom end of the pre-storage box. A pneumatic cylinder is provided at the end of the pre-storage box away from the door panel. The pneumatic cylinder is used to drive the activated carbon plate to slide. The beneficial effects that can be obtained are: the activated carbon plate is replaced regularly in the pre-storage box, the servo motor drives the screw to rotate, driving the push-pull plate and the transition rail to slide synchronously in the pre-storage box, and pulling the activated carbon plate in the purification pipe into the pre-storage box. When the transition rail is aligned with the limit rail, the pneumatic cylinder drives multiple activated carbon plates and multiple limit rails to slide toward the door panel a distance of the thickness of the activated carbon plate, and then the servo motor rotates in the opposite direction, driving the push-pull plate and the transition rail to slide synchronously in the pre-storage box, and pushing the new activated carbon plate into the purification pipe. It has the function of automatic replacement of activated carbon plates and reduces labor costs.

[0017] 3. By setting a transmission assembly, the transmission assembly includes a screw, the screw is rotatably installed at the bottom end of the purification pipe, the screw is rotatably connected to the push-pull plate, a transmission rod is penetrated and rotatably installed on the side wall of the air inlet pipe, the transmission rod is arranged in parallel with the screw, one end of the screw and the transmission rod are aligned, a gear set is arranged between the transmission rod and the rotating shaft, the aligned ends of the screw and the transmission rod are respectively provided with a first pulley and a second pulley, and a synchronous belt is arranged between the first pulley and the second pulley; The beneficial effects that can be obtained are: the forward and reverse rotating fans rotate in opposite directions, the air flows in the opposite direction, and the first pulley, the second pulley and the synchronous belt are cooperated to drive the transmission rod to rotate, and the gear set is cooperated to drive the rotating shaft and multiple brushes to rotate, so as to automatically clean the filter. It has the function of automatically cleaning the air filter port in the equipment, thereby reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 is a cross-sectional view of the purification pipeline in the present invention; Figure 3 The figure is a diagram of the installation structure of the ultraviolet sterilization lamp in the present invention; Figure 4 It is the installation structure diagram of the pre-stored box in the present invention; Figure 5 The figure is a structural diagram of the installation of the activated carbon plate and the pre-storage box in the present invention; Figure 6 A state diagram showing the push-pull plate in the present invention pushing out the activated carbon plate; Figure 7 This is a diagram of the installation structure of the push-pull plate and the transition rail in the present invention; Figure 8 It is the installation structure diagram of the transmission assembly in the present invention.

[0020] Description of reference numerals: In the figure: 1. purification pipeline; 11. ultraviolet sterilization lamp; 12. tubular plasma generator; 13. activated carbon plate; 131. limit hole; 132. limit block; 14. forward and reverse fan; 15. ventilation plate; 2. pre-storage box; 21. door panel; 22. limit rail; 23. push-pull plate; 24. transition rail; 25. pneumatic cylinder; 26. cross bar; 3. atomization device; 31. tubular atomization nozzle; 32. liquid storage tank; 33. drainage pipe; 34. high-pressure water pump; 41. air inlet pipe; 42. support ring; 43. filter; 51. rotating shaft; 52. plate brush; 61. screw; 62. transmission rod; 63. gear set; 64. first pulley; 65. second pulley; 66. synchronous belt; 67. L-shaped plate; 68. servo motor. DETAILED DESCRIPTION

[0021] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are clearly and completely described below in combination with the accompanying drawings and preferred embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present application, it should be understood that the orientation or position relationship indicated by "inside", "outside", etc. is based on the orientation or position described in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, a specific orientation structure and operation, and therefore cannot be understood as a limitation on the present application.

[0023] Reference Figure 1-Figure 8 , a multifunctional ceiling-mounted gas disinfection, deodorization and purification device disclosed in the present invention comprises a purification pipe 1, the top wall of the purification pipe 1 is provided with an ultraviolet sterilization lamp 11, the bottom wall of the purification pipe 1 is provided with a tubular plasma generator 12, an activated carbon plate 13 is penetrated and slidably installed on one side of the purification pipe 1, a through hole for the activated carbon plate 13 to enter and exit is provided on one side of the purification pipe 1, a flexible coating is provided on the through hole wall of the purification pipe 1, and a forward and reverse blower 14 is provided in the purification pipe 1.

[0024] The pre-storage box 2 is arranged on the side wall of the purification pipe 1. One end of the pre-storage box 2 and the side close to the purification pipe 1 are both open. The open end of the pre-storage box 2 is provided with a door panel 21. The inner wall of the side of the pre-storage box 2 away from the purification pipe 1 is provided with two limit rails 22. The middle part of the limit rail 22 is truncated. The bottom end of the pre-storage box 2 is penetrated and slidably installed with a push-pull plate 23. The width of the push-pull plate 23 matches the truncated length of the limit rail 22. The push-pull plate 23 is close to the purification pipe 1. Two transition rails 24 are provided on one side of the pipeline 1, and a limiting hole 131 is provided on the side wall of the activated carbon plate 13. The transition rail 24 and the door panel 21 are matched with the limiting hole 131. A pneumatic cylinder 25 is provided at one end of the pre-storage box 2 away from the door panel 21. The pneumatic cylinder 25 is used to drive the activated carbon plate 13 to slide. A limiting groove matching the push-pull plate 23 is provided at the bottom end of the pre-storage box 2. A cross bar 26 is provided in the limiting groove of the pre-storage box 2. The push-pull plate 23 and the cross bar 26 are penetrated and slidably connected.

[0025] The atomizing device 3 includes a tubular atomizing nozzle 31 and a liquid storage tank 32. The tubular atomizing nozzle 31 is installed on the top wall of the purification pipeline 1. The liquid storage tank 32 is used to store the diluted deodorant. The atomizing device 3 also includes a liquid pumping component, which includes a high-pressure water pump 34. A drainage pipe 33 is arranged between the liquid outlet of the liquid storage tank 32 and the liquid inlet of the tubular atomizing nozzle 31. The high-pressure water pump 34 is installed on the side wall of the drainage pipe 33.

[0026] The filtering device includes an air inlet pipe 41 , which is installed at one end of the purification pipeline 1 away from the atomizing device 3 , a support ring 42 is provided on the inner wall of the air inlet pipe 41 , and a filter screen 43 is provided on the side of the support ring 42 away from the atomizing device 3 .

[0027] The filter device further includes a rotating shaft 51 , which is rotatably mounted on the inner wall of the air inlet pipe 41 through a plate body. A plurality of brushes 52 are provided at one end of the rotating shaft 51 close to the support ring 42 , and the brushes 52 are used to clean the filter screen 43 .

[0028] The transmission assembly is used to drive the push-pull plate 23 to slide and the rotating shaft 51 to rotate. The transmission assembly includes a screw 61, which is rotatably installed at the bottom end of the purification pipeline 1. The screw 61 is rotatably connected to the push-pull plate 23. A transmission rod 62 is rotatably installed on the side wall of the air inlet pipe 41. The transmission rod 62 is arranged parallel to the screw 61, and one end of the screw 61 and the transmission rod 62 are aligned. A gear set 63 is arranged between the transmission rod 62 and the rotating shaft 51. The gear set 63 includes two bevel gears that are vertically distributed and meshed with each other. Wheel, two bevel gears of gear set 63 are respectively installed on the end of transmission rod 62 and rotating shaft 51, and the aligned ends of screw 61 and transmission rod 62 are respectively provided with first pulley 64 and second pulley 65, and a synchronous belt 66 is provided between the first pulley 64 and the second pulley 65. The transmission assembly also includes a servo motor 68, and an L-shaped plate 67 is provided on the side of pre-storage box 2 away from purification pipeline 1. The servo motor 68 is fixedly installed with the side wall of L-shaped plate 67, and the output shaft of servo motor 68 is fixedly connected with screw 61 through a coupling.

[0029] The working principle and use process of the present invention are as follows: first, the forward and reverse blower 14 rotates to pump the air in the farm, and the air flows through the filter device, the activated carbon plate 13 and the atomizer 3 in sequence. At the same time, the filter 43 filters the large particles of impurities in the air, and the activated carbon plate 13 absorbs the harmful gases in the airflow to purify the air. The high-pressure water pump 34 cooperates with the drainage pipe 33 to pump the deodorizing liquid in the liquid storage tank 32 to the tubular atomizing nozzle 31 to deodorize and sterilize the air. The ultraviolet sterilization lamp 11 sterilizes the air. The tubular plasma generator 12 ionizes the gas to generate high-energy plasma, which reacts with pollutants such as bacteria, viruses, bacterial spores, pollen, smoke, odor, etc. in the air to decompose them into harmless or low-toxic substances, such as water and carbon dioxide. A plurality of unused activated carbon plates 13 are pushed into the pre-storage box 2 through the limit rail 22 and the transition rail 24, and occupy half of the space in the pre-storage box 2. The door panel 21 is closed. The pre-storage box 2 periodically replaces the activated carbon plates 13. The servo motor 68 drives the screw 61 to rotate, driving the push-pull plate 23 and the transition rail 24 to slide synchronously in the pre-storage box 2, and the activated carbon plates 13 in the purification pipeline 1 are pulled into the pre-storage box 2. When the transition rail 24 is aligned with the limit rail 22, the pneumatic cylinder 25 drives the plurality of activated carbon plates 13 and the plurality of limit rails 22 The servo motor 68 then rotates in the opposite direction, driving the push-pull plate 23 and the transition rail 24 to slide synchronously in the pre-storage box 2, pushing the new activated carbon plate 13 into the purification duct 1. At the same time, the forward and reverse blower 14 rotates in the opposite direction, and the air flows in the opposite direction, cooperating with the first pulley 64, the second pulley 65 and the synchronous belt 66 to drive the transmission rod 62 to rotate, cooperating with the gear set 63 to drive the rotating shaft 51 and multiple brushes 52 to rotate, and automatically cleaning the filter 43.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device, characterized in that: include: A purification duct (1), wherein an ultraviolet sterilization lamp (11) is arranged on the top wall of the purification duct (1), a tubular plasma generator (12) is arranged on the bottom wall of the purification duct (1), an activated carbon plate (13) is penetrated and slidably mounted on one side of the purification duct (1), and a forward and reverse rotating fan (14) is arranged inside the purification duct (1); A pre-storage box (2), the pre-storage box (2) being arranged on a side wall of the purification pipe (1), one end of the pre-storage box (2) and a side close to the purification pipe (1) being open, a door panel (21) being arranged at the open end of the pre-storage box (2), two limit rails (22) being arranged on the inner wall of a side of the pre-storage box (2) away from the purification pipe (1), the middle part of the limit rails (22) being truncated, a push-pull plate (23) being penetrated and slidably installed at the bottom end of the pre-storage box (2), a pneumatic cylinder (25) being arranged at the end of the pre-storage box (2) away from the door panel (21), the pneumatic cylinder (25) being used to drive the activated carbon plate (13) to slide; an atomizing device (3), the atomizing device (3) comprising a tubular atomizing nozzle (31) and a liquid storage tank (32), the tubular atomizing nozzle (31) being mounted on the top wall of the purification pipeline (1), and the liquid storage tank (32) being used to store diluted deodorant; A filtering device, the filtering device comprising an air inlet pipe (41), the air inlet pipe (41) being mounted on an end of the purification pipeline (1) away from the atomizing device (3), a support ring (42) being provided on an inner wall of the air inlet pipe (41), and a filter screen (43) being provided on a side of the support ring (42) away from the atomizing device (3); The filtering device further comprises a rotating shaft (51), wherein the rotating shaft (51) is rotatably mounted on the inner wall of the air inlet pipe (41) via a plate body, and a plurality of brushes (52) are arranged at one end of the rotating shaft (51) close to the support ring (42), wherein the brushes (52) are used to clean the filter screen (43); A transmission assembly, the transmission assembly is used to drive the push-pull plate (23) to slide and the rotating shaft (51) to rotate.

2. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: The width of the push-pull plate (23) matches the cut-off length of the limit rail (22); two transition rails (24) are provided on one side of the push-pull plate (23) close to the purification pipe (1); a through hole for the activated carbon plate (13) to enter and exit is provided on one side of the purification pipe (1); and a flexible coating is provided on the through hole wall of the purification pipe (1).

3. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 2, characterized in that: The side wall of the activated carbon plate (13) is provided with a limiting hole (131), and the transition rail (24) and the door panel (21) both match the limiting hole (131).

4. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: The bottom end of the pre-storage box (2) is provided with a limiting groove matching the push-pull plate (23), a cross bar (26) is provided in the limiting groove of the pre-storage box (2), and the push-pull plate (23) and the cross bar (26) are penetrated and slidably connected.

5. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: The atomizing device (3) further comprises a liquid pumping assembly, the liquid pumping assembly comprising a high-pressure water pump (34), a drainage pipe (33) is provided between the liquid outlet of the liquid storage tank (32) and the liquid inlet of the tubular atomizing nozzle (31), and the high-pressure water pump (34) is mounted on the side wall of the drainage pipe (33).

6. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: The transmission assembly comprises a screw (61), wherein the screw (61) is rotatably mounted on the bottom end of the purification duct (1), and the screw (61) is rotatably connected to the push-pull plate (23). A transmission rod (62) is passed through the side wall of the air inlet duct (41) and is rotatably mounted thereon. The transmission rod (62) is arranged in parallel with the screw (61), and one end of the screw (61) and the transmission rod (62) are arranged in alignment. A gear set (63) is arranged between the transmission rod (62) and the rotating shaft (51), and a first pulley (64) and a second pulley (65) are respectively arranged at the aligned ends of the screw (61) and the transmission rod (62), and a synchronous belt (66) is arranged between the first pulley (64) and the second pulley (65).

7. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 6, characterized in that: The gear set (63) comprises two bevel gears that are vertically distributed and mesh with each other, and the two bevel gears of the gear set (63) are respectively mounted on the ends of the transmission rod (62) and the rotating shaft (51).

8. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 6, characterized in that: The transmission assembly further comprises a servo motor (68); an L-shaped plate (67) is provided on a side of the pre-storage box (2) away from the purification pipeline (1); the servo motor (68) is fixedly mounted on a side wall of the L-shaped plate (67); and an output shaft of the servo motor (68) is fixedly connected to the screw rod (61) via a coupling.

9. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: An air permeable plate (15) is provided at one end of the purification pipeline (1) away from the filter device, and the filter device, the forward and reverse blower (14), the activated carbon plate (13), the tubular plasma generator (12) and the air permeable plate (15) are arranged in sequence in the purification pipeline (1).

10. A multifunctional ceiling-mounted gas disinfection, deodorization and purification device according to claim 1, characterized in that: The top wall and the bottom wall of the purification pipeline (1) are each provided with two limit blocks (132), and the activated carbon plate (13) is slidably mounted between the four limit blocks (132).

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