CN113959406B

CN113959406B - Mine geological disaster monitoring and early warning device

Info

Publication number: CN113959406B
Application number: CN202111124949.9A
Authority: CN
Inventors: 周少华; 杨庭森; 房志敏; 高祥; 李良勇; 田文滨
Original assignee: Mingda Ocean Engineering Co ltd
Current assignee: Mingda Ocean Engineering Co ltd
Priority date: 2021-09-25
Filing date: 2021-09-25
Publication date: 2023-08-25
Anticipated expiration: 2041-09-25
Also published as: CN113959406A

Abstract

The application relates to the technical field of geological disaster early warning, in particular to a mine geological disaster monitoring and early warning device which comprises an inclinometer body and an inclinometer sleeve, wherein the inclinometer body is inserted into the inclinometer sleeve, pulleys are respectively arranged at two ends of the inclinometer body, a chute is arranged in the inclinometer sleeve, the pulleys are rotatably arranged in the chute, a ferrule is sleeved on the inclinometer body, a mounting rod is arranged on the ferrule, the pulleys are rotatably arranged on the mounting rod, and a cleaning assembly for cleaning impurities in the chute is arranged on the mounting rod. The application has the effect of improving the measurement accuracy.

Description

Mine geological disaster monitoring and early warning device

Technical Field

The application relates to the technical field of geological disaster early warning, in particular to a mine geological disaster monitoring and early warning device.

Background

The mine geological disaster is also called mine geological disaster and mining geological disaster, and is disaster which damages human life and property safety and affects mining production due to serious changes of a large number of mine roadway damages, rock-soil body deformation, mining area geology, hydrogeological conditions and natural environment in the mining deposit mining activities. In order to reduce economic loss caused by geological disasters, monitoring and early warning are needed for the mine geological disasters. The monitoring is generally performed by using a geological disaster deep displacement monitoring device.

The device for monitoring and early warning of geological disasters in the related art comprises an inclinometer, a control cable, an inclinometer and a sleeve, wherein the sleeve is buried in the ground, the inclinometer and the inclinometer are connected through the control cable, pulleys are respectively arranged at two ends of the inclinometer, a chute for moving the inclinometer is formed in the sleeve, the inclinometer moves in the chute through the pulleys, and the side inclinometer is placed in the sleeve. And the position of the inclinometer in the sleeve is regulated by a control cable, so that geological disasters are monitored.

With respect to the above related art, the inventors consider that the pulley is easy to separate from the chute when moving, which causes a change in the position of the inclinometer relative to the sleeve, and affects the measurement accuracy.

Disclosure of Invention

In order to improve measurement accuracy, the application provides a mine geological disaster monitoring and early warning device.

The application provides a mine geological disaster monitoring and early warning device which adopts the following technical scheme:

the utility model provides a mine geological disaster monitoring early warning device, includes inclinometer body and inclinometer sleeve pipe, and the inclinometer body is inserted and is established at the inclinometer intraductal, the both ends of inclinometer body are provided with the pulley respectively, the intraductal spout of having seted up of inclinometer, the pulley rotates the setting in the spout, the cover is equipped with the lasso on the inclinometer body, be provided with the installation pole on the lasso, the pulley rotates the setting on the installation pole, be provided with the clearance subassembly that is used for clearing up impurity in the spout on the installation pole.

Through adopting above-mentioned technical scheme, the pulley removes in the spout, places the inclinometer body in the inclinometer sleeve pipe, clears away the impurity in the spout through the clearance subassembly, reduces the phenomenon that the pulley appears deviating from the spout, promotes the stability of pulley when removing in the spout, reduces the position of inclinometer body and appears the skew relative inclinometer body, promotes measuring precision.

Optionally, the cleaning assembly comprises a receiving rod, a middle rod and a cleaning plate, and the receiving rod is connected with the mounting rod; one end of the middle rod is connected with the bearing rod, the other end of the middle rod is connected with the cleaning plate, one end of the cleaning plate deviating from the middle rod is arranged at intervals with the pulleys, and the cleaning plate is abutted against the inner wall of the chute.

Through adopting above-mentioned technical scheme, clearance board and pulley interval set up, and clearance board's side and spout lateral wall butt when the installation pole drives the pulley and remove, drives the clearance board simultaneously and removes, clears up impurity in the spout, reduces impurity and appears interfering the phenomenon that the pulley removed in the spout, promotes the stability of pulley when removing in the spout.

Optionally, the one end that is close to the intermediate lever on the holding rod has seted up the removal groove, the intermediate lever slides in the removal groove and sets up, be provided with the elastic component two that are used for adjusting the intermediate lever position in the removal groove, the clearance board rotates the setting at the tip of intermediate lever, the rotation department of clearance board and intermediate lever is provided with the rotation piece one that is used for adjusting the clearance board position.

Through adopting above-mentioned technical scheme, when the inconvenient impurity department of cleaing up the board and moving to remove in the removal groove, the intermediate lever slides in the removal groove, and the clearance board rotates simultaneously for the clearance board turns over the impurity at this position, makes the inclinometer body normally remove in the inclinometer sleeve pipe.

Optionally, the one end that the installation pole is close to the pulley is provided with the slide bar, the groove of stepping down has been seted up to the one end that is close to the pulley on the installation pole, the slide bar is in the inslot of stepping down setting, it is provided with the piece of stepping down that is used for adjusting the slide bar position to step down, the pulley rotates the setting at the one end that the slide bar deviates from the installation pole, be provided with two sets of clearance subassembly on the installation pole, two sets of clearance subassembly sets up in the both sides of pulley, two sets of clearance board and pulley setting in the clearance subassembly are on same straight line.

Through adopting above-mentioned technical scheme, set up pulley through slide bar and installation pole sliding connection to the pulley passes through impurity, sets up two clearance boards and pulley simultaneously on same straight line, makes clearance board and pulley pass through impurity in proper order, reduces two clearance boards and pulley and appears breaking away from the phenomenon of spout simultaneously, promotes the stability of pulley when moving in the spout.

Optionally, set up in the lasso inner wall and be the activity groove of ring form, the slip is provided with the fly leaf in the activity groove, the fly leaf is circular-arc, logical groove has been seted up to the side of lasso, logical groove and activity groove intercommunication, the installation pole passes logical inslot and the fly leaf connection that extends to, installation pole and logical inslot wall interval setting, be provided with the elastic component one that is used for adjusting the fly leaf position in the activity groove.

Through adopting above-mentioned technical scheme, the fly leaf slides in the movable groove and sets up the installation pole and pass through the groove and be connected with the fly leaf to the installation pole rotates with the lasso relatively, promotes the stability that the pulley removed in the spout.

Optionally, the cleaning plate is raised towards the direction away from the pulley along the middle part of the cleaning plate in the length direction, and inclined planes are formed on two sides of the cleaning plate.

Through adopting above-mentioned technical scheme, set up the both sides slope setting of clearance board to impurity clearance out the outside of spout under the effect on inclined plane, promote the scavenging effect of impurity.

Optionally, the one end that the clearance board is close to the intermediate lever is provided with the knot pole of keeping out, the knot groove of keeping out has been seted up to the one end that is close to the clearance board on the intermediate lever, the knot groove of keeping out sets up in the intermediate lever one side that deviates from the pulley, the knot pole card of keeping out is established in the knot inslot of keeping out.

Through adopting above-mentioned technical scheme, set up the knot pole of keeping out and keep out the groove lock, rotate the clearance board along the direction towards the pulley to after removing impurity, the clearance board is carried out the shovel to the impurity in the spout after rotating to initial position, promotes the effect of clearance.

Optionally, the draw-in groove has been seted up on the installation pole, the one end that the pole was deviate from to the middle pole is integrally provided with the draw-in lever, the draw-in lever rotates the setting in the draw-in groove, draw-in lever and draw-in groove inner wall interval setting.

Through adopting above-mentioned technical scheme, set up clamping lever and draw-in groove inner wall interval setting to accept the pole and rotate relative installation pole, promote the stability of pulley and clearance board when moving in the spout.

Optionally, the draw-in bar is last to have seted up the rotation groove, be provided with the dwang in the draw-in groove, the dwang inserts and establishes in the rotation groove, the draw-in bar rotates the setting on the dwang, be provided with the piece that resets that is used for adjusting the holding pole position in the rotation groove.

By adopting the technical scheme, the reset piece is arranged to adjust the position of the receiving rod, the receiving rod rotates relative to the mounting rod, and then returns to the initial position under the action of the reset piece, so that the measurement accuracy of the inclinometer body is improved.

Drawings

Fig. 1 is a schematic structural diagram of a mine geological disaster monitoring and early warning device according to an embodiment of the application.

Fig. 2 is a cut-away view of an inclinometer body in a mine geological disaster monitoring and early warning device according to an embodiment of the application.

Fig. 3 is a structural view of a pulley in the mine geological disaster monitoring and early warning device according to the embodiment of the application.

Fig. 4 is a cut-away view of a ferrule in a mine geological disaster monitoring and early warning device according to an embodiment of the application.

Fig. 5 is a structural view of a cleaning component in the mine geological disaster monitoring and early warning device according to the embodiment of the application.

Fig. 6 is a structural view of an intermediate rod of the mine geological disaster monitoring and early warning device according to the embodiment of the application.

Fig. 7 is a structural view of a receiving rod in the mine geological disaster monitoring and early warning device according to the embodiment of the application.

Fig. 8 is a structural view of a clamping rod in the mine geological disaster monitoring and early warning device according to the embodiment of the application.

Reference numerals: 1. an inclinometer body; 11. a control cable; 2. inclinometer casing; 21. a chute; 3. a pulley; 4. a ferrule; 41. a movable groove; 42. a movable plate; 43. a through groove; 44. an elastic piece I; 5. a mounting rod; 51. a relief groove; 52. a clamping groove; 53. a rotating lever; 6. cleaning the assembly; 61. a receiving rod; 611. a moving groove; 612. an elastic piece II; 62. an intermediate lever; 621. a retaining groove; 63. a cleaning plate; 631. a retaining rod; 7. a first rotating member; 8. a slide bar; 81. a yielding member; 9. a clamping rod; 91. a rotating groove; 92. and a reset piece.

Detailed Description

The application is described in further detail below with reference to fig. 1-8.

The application discloses a mine geological disaster monitoring and early warning device. Referring to fig. 1 and 2, the mine geological disaster monitoring and early warning device comprises an inclinometer body 1 and an inclinometer sleeve 2, wherein the inclinometer sleeve 2 is buried in a mine geological area to be monitored, the inclinometer body 1 is inserted in the inclinometer sleeve 2, a control cable 11 is connected to the inclinometer body 1, the other end of the control cable 11 is connected with an inclinometer, and when in measurement, the geological condition is monitored by adjusting the position of the inclinometer body 1 in the inclinometer sleeve 2, and meanwhile, monitored data is conveyed to an inclinometer through the control cable 11.

Referring to fig. 3 and 4, a set of pulleys 3 is provided at both ends of the inclinometer body 1, each set of pulleys 3 includes two, and two pulleys 3 are provided at both sides of the inclinometer body 1, a chute 21 is provided in the inclinometer sleeve 2, the chute 21 is provided along the length direction of the inclinometer body 1, the pulleys 3 are clamped in the chute 21, and the pulleys 3 are rotatably provided in the chute 21, a ferrule 4 for installing the pulleys 3 is provided outside the inclinometer body 1, the ferrule 4 is sleeved outside the inclinometer body 1, a mounting rod 5 is provided on the pulleys 3, the pulleys 3 are rotatably arranged on the mounting rod 5, one end of the mounting rod 5 deviating from the pulleys 3 is connected with the ferrule 4, the mounting rod 5 is provided with two, and the two mounting rods 5 are arranged on the same straight line, a movable groove 41 is provided in the inner wall of the ferrule 4, the movable groove 41 is circular-ring-shaped, a movable plate 42 is slidably provided in the movable groove 41, a circular arc-shaped movable plate 42 is provided at the side surface of the chute 4, a through groove 43 is provided at the side of the inclinometer body 1, the mounting rod 5 deviates from the mounting rod 3 and passes through the movable groove 21 to the movable groove 4, and extends to the movable groove 43 in the movable groove 4, and the movable groove 4 is rotatably arranged in the inner wall 4, and the movable groove 4 is rotatably arranged in the direction 4, and the movable groove 4 is rotatably, and the movable groove 4 is arranged in the movable groove 4.

Referring to fig. 4 and 5, an elastic member one 44 is disposed in the movable slot 41, the elastic member one 44 is provided with a plurality of elastic members, the elastic members one 44 are respectively disposed at two ends of the movable plate 42, two baffles are disposed in the movable slot 41, a connecting line between the two baffles coincides with a center of the ferrule 4, an end of the movable plate 42 is disposed at intervals with the baffles, the elastic member one 44 can be disposed as a spring, one end of the spring abuts against an end of the movable plate 42, the other end abuts against the baffles, two springs are disposed to adjust a position of the movable plate 42, so that two mounting rods 5 on a side face of the ferrule 4 are on the same straight line, and meanwhile, a connecting line between the two mounting rods 5 on the side face of the ferrule 4 coincides with the center of the ferrule 4, so that the center lines of the inclinometer body 1 and the inclinometer sleeve 2 coincide, and measurement accuracy of the inclinometer body 1 is improved. In other embodiments, threads may be provided on the outside of the inclinometer body 1, and a thread groove may be provided on the inside of the inclinometer collar 4, where the thread groove is connected with the threads in a matching manner, so as to connect or separate the collar 4 and the inclinometer body 1, and facilitate carrying thereof.

Referring to fig. 4 and 5, in order to facilitate the pulley 3 to move in the chute 21, a cleaning assembly 6 for cleaning impurities in the chute 21 is provided on the mounting rod 5, the cleaning assembly 6 comprises a receiving rod 61, an intermediate rod 62 and a cleaning plate 63, the receiving rod 61, the intermediate rod 62 and the cleaning plate 63 are arranged on the same straight line, one end of the receiving rod 61 is connected with the mounting rod 5, the other end of the receiving rod is obliquely arranged along the direction far away from the pulley 3, the intermediate rod 62 is arranged between the cleaning plate 63 and the receiving rod 61, one end of the cleaning plate 63, which is away from the intermediate rod 62, is abutted against the inner wall of the chute 21, and the cleaning plate 63 and the pulley 3 are arranged at intervals, when the pulley 3 slides in the chute 21, the cleaning plate 63 moves in the chute 21 at the same time, the impurities in the chute 21 are scraped to the outside of the chute 21, the phenomenon that the impurities affect the rotation of the pulley 3 is reduced, the phenomenon that the pulley 3 is separated from the chute 21 is reduced, and the measurement progress is improved. The cleaning plate 63 is protruded in the direction away from the pulley 3 along the middle of the length direction, so that inclined planes are formed on two sides of the cleaning plate 63, impurities in the chute 21 are pushed to the outside of the chute 21 under the action of the inclined planes of the cleaning plate 63, and the cleaning effect is improved.

Referring to fig. 5 and 6, a moving groove 611 is formed at one end of the receiving bar 61 near the intermediate bar 62, the intermediate bar 62 is slidably disposed in the moving groove 611 along the length direction of the receiving bar 61, a second elastic member 612 is disposed in the moving groove 611, the second elastic member 612 may be provided as a spring, one end of the spring is connected to the inner wall of the moving groove 611, the other end of the spring abuts against the end of the intermediate bar 62, the cleaning plate 63 is rotatably disposed at the end of the intermediate bar 62, a first rotary member 7 is disposed at the rotation positions of the cleaning plate 63 and the intermediate bar 62, the first rotary member 7 may be provided as a torsion spring, and the torsion spring is respectively connected to the intermediate bar 62 and the cleaning plate 63 for adjusting the position of the cleaning plate 63. In the initial state, the cleaning plate 63, the middle rod 62 and the receiving rod 61 are on the same straight line, impurities in the chute 21 are cleaned along with the movement of the roller, when the impurity with strong adhesive force on the inner wall of the chute 21 is moved, the middle rod 62 moves along the direction towards the receiving rod 61, meanwhile, the cleaning plate 63 rotates, the impurity is turned over, deformation of the cleaning plate 63 is reduced, and the stability during movement is improved.

Referring to fig. 5 and 6, a slide bar 8 is disposed at one end of the mounting bar 5 near the pulley 3, a yielding groove 51 is disposed at one end of the mounting bar 5 near the pulley 3, one end of the slide bar 8 is slidably disposed in the yielding groove 51, the other end is connected with the pulley 3, a yielding member 81 is disposed in the yielding groove 51, the yielding member 81 can be disposed as a spring, one end of the spring is abutted against an inner wall of the yielding groove 51, the other end is abutted against an end of the slide bar 8, when encountering impurities which cannot be cleaned by the cleaning plate 63, the pulley 3 drives the slide bar 8 to move in the yielding groove 51, and after the cleaning plate 63 turns over the impurities, the pulley 3 is turned over the impurities. Two groups of cleaning components 6 are arranged on the mounting rod 5, the two groups of cleaning components 6 are respectively arranged on two sides of the pulley 3, and cleaning plates 63 in the two groups of cleaning components 6 and the pulley 3 are arranged on the same straight line, so that the pulley 3 can clean impurities in the chute 21 when moving in different directions. Meanwhile, when encountering impurities with stronger adhesive force, one cleaning plate 63 rotates to be respectively connected with the sliding groove 21, the other cleaning plate 63 and the pulley 3 are arranged in the sliding groove 21, the two cleaning plates 63 and the pulley 3 sequentially pass through the impurities, two of the two cleaning plates 63 and the pulley 3 are simultaneously kept in the sliding groove 21, the phenomenon that the whole body deviates from the sliding groove 21 is reduced, and the stability during movement is improved.

Referring to fig. 5 and 6, the cleaning plate 63 is provided with a catching groove 621 at one end thereof near the intermediate lever 62, and a catching groove 621 is provided at one end thereof near the cleaning plate 63 on the intermediate lever 62, the catching groove 621 being provided at one side of the intermediate lever 62 facing away from the pulley 3, the catching groove 621 being caught so that the cleaning plate 63 can be rotated only in a direction toward the pulley 3, so that when the cleaning plate 63 is restored to an initial state after rotation, the cleaning plate 63 abuts against an inner wall of the chute 21, and impurities in the chute 21 are cleaned again.

Referring to fig. 7 and 8, a clamping groove 52 is formed in the mounting rod 5, a clamping rod 9 is integrally arranged at one end, deviating from the middle rod 62, of the receiving rod 61, the clamping rod 9 is clamped in the clamping groove 52 and is rotatably arranged around the mounting rod 5 in the clamping groove 52, and the clamping rod 9 and the inner wall of the clamping groove 52 are arranged at intervals, so that when the mounting rod 5 drives the cleaning plate 63 to move, the clamping rod 9 can swing in the clamping groove 52, the two cleaning plates 63 and the pulley 3 move in the sliding groove 21 stably, and meanwhile the pulley 3 moves in the sliding groove 21 stably.

Referring to fig. 7 and 8, a rotating rod 53 is disposed in the clamping groove 52, a rotating groove 91 is formed in the clamping rod 9, the rotating rod 53 is arranged in the rotating groove 91 in a penetrating manner, the clamping rod 9 is arranged outside the rotating rod 53 in a rotating manner, a reset piece 92 is disposed in the rotating groove 91, the reset piece 92 can be a torsion spring, the torsion spring is sleeved outside the clamping rod 9, one end of the torsion spring is connected with the inner wall of the rotating groove 91, the other end of the torsion spring is connected with the rotating rod 53, the torsion spring drives the receiving rod 61 to rotate through the clamping rod 9, and then the position of the cleaning plate 63 is adjusted, so that the stability of the cleaning plate 63 during movement is further improved.

The implementation principle of the application is as follows: put into spout 21 with clearance board 63 and pulley 3, when inclinometer body 1 removes in inclinometer sleeve pipe 2, drive clearance board 63 and pulley 3 through installation pole 5 and remove, clearance board 63 sets up in the both sides of pulley 3, when pulley 3 removes, clearance board 63 clear up the impurity in the spout 21, impurity in the reduction spout 21 is more, the phenomenon that skew spout 21 appears in the pulley 3 results in, promote the stability that pulley 3 removed in spout 21, the phenomenon that skew inclinometer sleeve pipe 2 central line appears in reduction inclinometer body 1, promote the precision of monitoring.

The above embodiments are not intended to limit the scope of the present application, so: all equivalent changes in structure, shape and principle of the application should be covered in the scope of protection of the application.

Claims

1. The utility model provides a mine geological disaster monitoring early warning device, includes inclinometer body (1) and inclinometer sleeve pipe (2), and inclinometer body (1) inserts and establishes in inclinometer sleeve pipe (2), its characterized in that: the intelligent inclinometer comprises an inclinometer body (1), wherein pulleys (3) are respectively arranged at two ends of the inclinometer body (1), sliding grooves (21) are formed in inclinometer sleeves (2), the pulleys (3) are rotationally arranged in the sliding grooves (21), a ferrule (4) is sleeved on the inclinometer body (1), a mounting rod (5) is arranged on the ferrule (4), the pulleys (3) are rotatably arranged on the mounting rod (5), a cleaning assembly (6) for cleaning impurities in the sliding grooves (21) is arranged on the mounting rod (5), and the cleaning assembly (6) comprises a bearing rod (61), a middle rod (62) and a cleaning plate (63), and the bearing rod (61) is connected with the mounting rod (5); one end of the middle rod (62) is connected with the bearing rod (61), the other end of the middle rod (62) is connected with the cleaning plate (63), one end of the cleaning plate (63) deviating from the middle rod (62) is arranged at intervals with the pulley (3), the cleaning plate (63) is in butt joint with the inner wall of the sliding groove (21), a moving groove (611) is formed in one end, close to the middle rod (62), of the bearing rod (61), the middle rod (62) is arranged in the moving groove (611) in a sliding mode, an elastic piece II (612) for adjusting the position of the middle rod (62) is arranged in the moving groove (611), the cleaning plate (63) is arranged at the end portion of the middle rod (62) in a rotating mode, and a rotating piece I (7) for adjusting the position of the cleaning plate (63) is arranged at the rotating position of the cleaning plate (63) and the middle rod (62).

2. The mine geological disaster monitoring and early warning device according to claim 1, wherein: the utility model discloses a pulley, including installation pole (5), pulley (3), clearance subassembly (6), slide bar (8), installation pole (5) are close to one end of pulley (3) and are provided with slide bar (8), slide bar (8) are provided with in groove (51) of stepping down and are used for adjusting slide bar (8) position step down piece (81), pulley (3) are provided with two sets of clearance subassembly (6) in slide bar (8) one end rotation setting that deviates from installation pole (5), be provided with on installation pole (5), two sets of clearance subassembly (6) set up in pulley (3) both sides, two sets of clearance board (63) and pulley (3) in clearance subassembly (6) set up on same straight line.

3. The mine geological disaster monitoring and early warning device according to claim 1, wherein: the novel movable ring is characterized in that a movable groove (41) which is in a circular ring shape is formed in the inner wall of the ferrule (4), a movable plate (42) is arranged in the movable groove (41) in a sliding mode, the movable plate (42) is in an arc shape, a through groove (43) is formed in the side face of the ferrule (4), the through groove (43) is communicated with the movable groove (41), the mounting rod (5) penetrates through the through groove (43) to extend into the movable groove (41) and is connected with the movable plate (42), the mounting rod (5) and the inner wall of the through groove (43) are arranged at intervals, and an elastic piece I (44) used for adjusting the position of the movable plate (42) is arranged in the movable groove (41).

4. The mine geological disaster monitoring and early warning device according to claim 3, wherein: the cleaning plate (63) protrudes along the middle part of the length direction of the cleaning plate towards the direction deviating from the pulley (3) to form inclined planes on two sides of the cleaning plate.

5. The mine geological disaster monitoring and early warning device according to claim 2, wherein: the cleaning plate (63) is provided with a buckling rod (631) near one end of the middle rod (62), a buckling groove (621) is formed in one end of the middle rod (62) near the cleaning plate (63), the buckling groove (621) is formed in one side, deviating from the pulley (3), of the middle rod (62), and the buckling rod (631) is clamped in the buckling groove (621).

6. The mine geological disaster monitoring and early warning device according to claim 5, wherein: the mounting rod (5) is provided with a clamping groove (52), one end of the bearing rod (61) deviating from the middle rod (62) is integrally provided with a clamping rod (9), the clamping rod (9) is rotationally arranged in the clamping groove (52), and the clamping rod (9) and the inner wall of the clamping groove (52) are arranged at intervals.

7. The mine geological disaster monitoring and early warning device according to claim 6, wherein: the clamping rod (9) is provided with a rotating groove (91), the clamping groove (52) is internally provided with a rotating rod (53), the rotating rod (53) is inserted into the rotating groove (91), the clamping rod (9) is rotatably arranged on the rotating rod (53), and the rotating groove (91) is internally provided with a reset piece (92) for adjusting the position of the receiving rod (61).