CN219605265U - Rock drilling machine and protection device thereof - Google Patents

Abstract

The utility model discloses a rock drilling machine and a protection device thereof, wherein the protection device comprises: a shield body, a movable door; wherein the shield body is formed with a guard space accommodating at least a portion of the rock drill; the shield body is configured to be formed with an overhaul channel communicating with the guard space; the movable door is movably connected to the shield body so that the movable door at least has a first movable position and a second movable position relative to the shield body; when the movable door is positioned at the first movable position, the overhaul channel is closed; the access passage is opened when the movable door is in the second movable position. The rock drilling machine and the protection device thereof have the advantages of safety protection and convenient maintenance.

Description

Rock drilling machine and protection device thereof

Technical Field

The utility model relates to the field of engineering machinery, in particular to a rock drilling machine and a protection device thereof.

Background

The drilling vehicle is a drilling equipment for tunnel and underground engineering by using drilling and blasting method, its front end is equipped with a general pushing beam, and on the pushing beam a drilling tool for drilling of drill rod, drill rod and anchor rod is set, these working tools and driving motor and driving member for driving are formed into a drilling mechanism for drilling of drilling vehicle, and one end of the pushing beam is equipped with a general mounting platform for mounting driving member of the working mechanism. In addition, the present drilling vehicles have developed a rod changing mechanism for changing working tools of different specifications, and a disassembling platform for separating or connecting the working tools from corresponding driving members during rod changing, wherein the rod changing mechanisms, the working platform and the working mechanism are integrated on a propelling beam, so that the drilling vehicle drives the propelling beam to travel, and drilling operations can be performed in different areas.

When the rock drilling vehicle is used, the operation mechanism at the end part of the rock drilling vehicle is generally in a high-speed working state, and a protective cover is arranged outside the operation mechanism to prevent broken stones, dust and the like generated during operation from damaging human bodies. For example, in an open-air rock drilling rig with telescopic arm and a drill rod replacing device disclosed in chinese patent document CN202560096U, a fixed integral shield is arranged outside the drill rod to prevent dust and broken stone from injuring personnel nearby the rock drilling rig, but the shield is fixedly arranged, and needs to be disassembled when maintenance is needed, so that the open-air rock drilling rig is quite inconvenient.

Disclosure of Invention

The summary of the utility model is provided to introduce a selection of concepts in a simplified form that are further described below in the detailed description. The summary of the utility model is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used to limit the scope of the claimed subject matter.

The utility model aims to solve the technical problems that the protection cover on the existing rock drilling vehicle is not easy to disassemble and assemble, so that the protection effect is not ideal and the overhaul is not facilitated. To solve this problem, some embodiments of the present utility model provide a protection device for constructing a rock drill rig, comprising: a shield body and a movable door; wherein the shield body is formed with a protective space accommodating at least a part of the rock drill; the shield body is configured to form an overhaul channel communicated with the protection space; the movable door is movably connected to the shield body so that the movable door at least has a first movable position and a second movable position relative to the shield body; when the movable door is at the first movable position, the overhaul channel is closed; the access passage is opened when the movable door is in the second movable position.

Further, the shield body is provided with a first equipment passage and a second equipment passage, which are respectively provided at opposite sides of the shield body in the first direction so that a part of the rock drill passes through the guard space.

Further, the service passage is disposed between the first equipment passage and the second equipment passage.

Further, the shield body is provided with a first protection part and a second protection part, the first protection part and the second protection part are respectively arranged on two sides of the shield body opposite to each other in the second direction, and the overhaul channel is arranged between the first protection part and the second protection part.

Further, the first direction is perpendicular to the second direction.

Further, the movable door and the shield body form a rotational connection about a pivot axis.

Further, the pivot axis is parallel to the first direction.

Preferably, when the movable door is in the second movable position, the movable door is at least partially located outside the protective space.

Preferably, the protection device further comprises: a first locking member and a second locking member; wherein the first locking member is connected to the shield body; the second locking piece is connected to the movable door; the first locking member is coupled with the second locking member when the movable door is in the first movable position to lock the movable door in the first movable position.

Preferably, the protection device further comprises: a trigger and a sensor; wherein, the trigger piece is fixedly connected to the shield body or/and the movable door; the sensor is fixedly connected to the shield body or/and the movable door so that the trigger piece is positioned in the detection area of the sensor when the movable door is in the first movable position.

In a second aspect of the utility model, there is also provided a rock drill rig comprising the aforementioned protection device.

The utility model has the beneficial effects that:

the rock drilling machine and the protection device thereof have the advantages of safety protection and convenient maintenance.

More specifically, some embodiments of the present utility model may have the following specific benefits:

1. the protection device provided is matched with the movable door through the protection cover body, the protection door is only required to be positioned at the first movable position in normal use, so that the channel can be closed, the protection cover body and the movable door are utilized to protect parts positioned in the protection space, meanwhile, broken stones are prevented from flying out of the protection space, and personnel safety nearby the rock drilling machine is protected;

2. through the cooperation between guard shield body and the dodge gate, when needs overhauld the rock drill, only need make it be in the second active site through removing the guard gate, can make the guard space that the guard shield body formed open to guard shield body outside through the maintenance passageway to make things convenient for personnel to pass through the maintenance passageway, and then overhaul the part that the rock drill is located the guard space, need not to carry out the dismouting to the guard shield body and can carry out maintenance work, the development of convenient maintenance work.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the utility model and are not to be construed as unduly limiting the utility model.

In addition, the same or similar reference numerals denote the same or similar elements throughout the drawings. It should be understood that the figures are schematic and that elements and components are not necessarily drawn to scale.

In the drawings:

FIG. 1 is an overall schematic of a protective device according to one embodiment of the utility model;

FIG. 2 is a schematic view of a part of the structure of the protection device of the embodiment, mainly showing the structure of a top frame and the like;

fig. 3 is an enlarged view of a portion a of fig. 2;

FIG. 4 is a schematic view of a portion of the structure shown in FIG. 2 from another perspective;

fig. 5 is a schematic overall structure of a rock drill rig according to an embodiment of the utility model.

Meaning of reference numerals:

100. a protection device;

110. a shield body; 110a, a protected space; 110b, a first device channel; 110c, a second device channel; 110d, an overhaul channel; 111. a top frame; 112. a side plate; 113. a bottom frame; 114. a mating portion; 115. a guide slope; 116. a limiting hole; 117. a connecting rib;

120. a movable door; 120a, a pivot axis; 121. a limit part; 122. a limiting pin; 123. a spring;

130. a loose leaf;

140. a first locking member;

150. a second locking member;

160. a hall linear sensor;

170. a metal piece;

180. an emergency stop switch;

190. a long screen;

200. rock drill;

210. a pusher beam;

220. a drill rod;

230. a rod changing mechanism;

240. and (5) disassembling the platform.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

It should be noted that, for convenience of description, only the portions related to the present utility model are shown in the drawings. Embodiments of the present disclosure and features of embodiments may be combined with each other without conflict.

It should be noted that the terms "first," "second," and the like in this disclosure are merely used to distinguish between different devices, modules, or units and are not used to define an order or interdependence of functions performed by the devices, modules, or units.

It should be noted that references to "one", "a plurality" and "a plurality" in this disclosure are intended to be illustrative rather than limiting, and those of ordinary skill in the art will appreciate that "one or more" is intended to be understood as "one or more" unless the context clearly indicates otherwise.

The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 4, in a first aspect, some embodiments of the present utility model provide a protection device 100 for constructing a rock drill, comprising: a shield body 110. Wherein, the shield body 110 is formed with a protection space 110a for accommodating at least a part of a rock drill, one end of a drill rod on a drill rod of the rock drill is used for drilling, and parts such as a rod changing mechanism, a driving part and the like are positioned in the protection space 110a, so that the parts are separated from the outside of the shield body 110 by the shield body 110, thus, flying stones and fragments can be blocked during the drilling operation of the drill rod, and the safety of personnel around the rock drill is protected.

Specifically, as shown in fig. 1, the shield body 110 is provided with a first equipment passage 110b and a second equipment passage 110c, the first equipment passage 110b and the second equipment passage 110c are respectively disposed at two opposite sides of the shield body 110 in the first direction so that a part of the rock drill passes through the guard space 110a, that is, the shield body 110 is disposed in a penetrating manner in the first direction so that the length direction of the drill rod can be disposed substantially parallel to the first direction, and thus the drill rod can move in the guard space 110a, so that the drill rod can perform rock drilling operations such as rotation and swing in the guard space 110a, and the rock drill can also replace the drill rod by the rod replacing mechanism without being blocked by the shield body 110.

On the basis that the shield body 110 of the present embodiment has a protective function against personnel around the rock drill, for easy maintenance, as shown in fig. 1-2, the shield body 110 is constructed such that a maintenance passage 110d communicating with the protective space 110a is formed, which communicates the protective space 110a with the outside of the shield body 110. Meanwhile, the protection device 100 further includes: a movable door 120. The movable door 120 is movably connected to the shroud body 110 such that the movable door 120 has at least a first movable position and a second movable position with respect to the shroud body 110. And defines an access passage 110d closed when the movable door 120 is in the first active position and an access passage 110d opened when the movable door 120 is in the second active position. Thus, when the rock drill is normally used, the overhaul channel 110d is closed so that the protection door and the protection cover body 110 jointly act to play a protection role when the rock drill works, and when overhaul is needed, the overhaul channel 110d is opened so that an overhaul worker approaches or enters the protection space 110a, and overhaul of the rock drill is facilitated.

Through above scheme, the guard shield of having solved present rock drilling machine is unfavorable for the problem that overhauls the work and goes on.

As a more specific embodiment of the above, the service passage 110d is provided between the first equipment passage 110b and the second equipment passage 110c. I.e. the service aisle 110d is located at the side of the rock drill rig instead of through parts of the rock drill rig such as the drill rod located in the guard space 110a, avoiding mutual interference between the position of the guard gate and the parts of the rock drill rig. In addition, the shield body 110 is provided with a first shielding portion and a second shielding portion, which are respectively provided at both sides of the shield body 110 opposite to the second direction, and the service passage 110d is provided between the first shielding portion and the second shielding portion. And further defines the first direction perpendicular to the second direction.

Specifically, as shown in fig. 2, the shield body 110 includes a top frame 111 and a plurality of side plates 112. The side plates 112 are disposed in two along the second direction, and form a first protection portion and a second protection portion of the shroud body 110 respectively. The side plate 112 is fixedly connected to a top frame 111 along an end parallel to the first direction, and the inner side of the top frame 111 is hollowed out, so that a first equipment channel 110b is formed inside the top frame 111 at one end of the side plate 112. In this way, a protective space 110a is formed under the periphery of the side plate 112 and the top frame 111, into which parts such as drill rods of the rock drill are put. On the basis of this, a portion between the two side plates 112 forms an inspection passage 110d communicating with the guard space 110a. The protective door is disposed at a side of the protective cover body 110 near the service passage 110d so that the protective cover body 110 opens or closes the protective passage. Preferably, the distance between the two side plates 112 is defined to be not smaller than the length of the side plate 112 in a third direction perpendicular to both the first direction and the second direction.

By adopting the scheme, the space where the overhaul channel 110d is located can be maximized, and an overhaul worker can observe the condition in the protection space 110a or pass through the overhaul channel 110d conveniently.

To secure the mounting strength, the side plate 112 and the top frame 111 are preferably iron or aluminum alloy products. It is considered that if the side plate 112 is a complete metal plate, heat generated during the operation of the rock drill is not easily dissipated, which easily causes problems such as overheating of the rock drill components. Therefore, preferably, the side plates 112 and the movable door 120 are hollow mesh plates, so that the heat dissipation capability of the rock drilling machine is ensured on the basis of ensuring that broken stone generated during the operation of the rock drilling machine has a blocking effect.

Specifically, the shield body 110 further includes a bottom frame 113. The bottom frame 113 is fixedly connected to one end of each side plate 112 far away from the top frame 111, and each side surface of the bottom frame 113 is hollowed out by digging holes, so that a second device channel 110c is formed inside. When the protection device 100 is integrated in a rock drill rig, the side plates 112 are fixedly connected to the ends of the push beams on the side facing away from the service aisle 110d, the length direction of the push beams being parallel to the first direction. The drill rod of the rock drill is inserted into the guard space 110a from the first equipment passage 110b inside the top frame 111, and one end thereof for rock drilling work is passed out of the guard space 110a from the second equipment passage 110c inside the bottom frame 113. As such, when the rock drill machine is drilling with the drill rod, the bottom frame 113 is closer to the rock drilling area than the side plates 112.

By adopting the scheme, the movable door 120 is relatively far away from the ground, so that when the overhaul channel 110d needs to be opened or closed, the movement of the movable door 120 is not blocked by the soil pile, the stone and other obstacles in the working area, and the operation of personnel is facilitated. Thereby the space arrangement of the overhaul channel 110d is more reasonable, and the overhaul work is further convenient.

As a specific possible embodiment of the connection between the movable door 120 and the shield body 110, a sliding connection or a rotating connection may be adopted between the movable door 120 and the shield body 110. In the preferred embodiment provided, at least one hinge 130 is installed at one side of the movable door 120. The hinge 130 is a common part for forming a rotational connection between two parts in daily life and production, and one side of the hinge 130 is fixedly connected to a side of the movable door 120, and the other side is fixedly connected to the shield body 110, so that the movable door 120 and the shield body 110 form a rotational connection around the pivot axis 120 a. The shield body 110 is optionally connected with the movable door 120 from the top frame 111/the bottom frame 113/the side plates 112, considering that when the drill rod, the rod changing mechanism and the like on the rock drilling machine are overhauled, the propelling beam is generally in a nearly vertical state, if the movable door 120 is connected at the bottom frame 113 or the top frame 111, the movable door 120 is in an operation mode of being turned up to open or turned down to open, the movable door is easy to fall to hit an overhauler after being opened, and the overhauler is influenced by the traffic of the overhauler at the overhauling channel 110d. Therefore, in the present embodiment, it is preferable that the movable door 120 is rotatably connected to the side plate 112, i.e., the pivot axis 120a is parallel to the first direction.

By adopting the scheme, after the movable door 120 rotates from the first movable position to the second movable position, the movable door is positioned at the side of the overhaul channel 110d, so that the overhaul personnel can pass through the overhaul channel 110d to the greatest extent.

As a further preferred embodiment of the above, it is defined that the movable door 120 is at least partially located outside the guard space 110a when the movable door 120 is in the second movable position. That is, when the movable door 120 is rotated from the first movable position to the second movable position, the movable door 120 is relatively far away from the guard space 110a.

By adopting the scheme, when the overhaul channel 110d is opened so that an overhaul worker observes or enters the protection space 110a, the movable door 120 does not occupy the position in the protection space 110a additionally, so that the overhaul worker is not hindered from observing the parts of the rock drilling machine in the protection space 110a, and meanwhile, the position of the movable door 120 does not cause obstruction to the operation of the overhaul worker in the protection space 110a, so that the use of the protection door is more reasonable.

In addition, as shown in fig. 4, a connection rib 117 is fixedly connected to each of the top frame 111 and the bottom frame 113 at a side far from the protection door 120, and the connection rib 117 is fixedly connected to the push beam of the rock drill by means of a connection such as bolting or welding, so that a fixed connection is formed between the protection cover body 110 and the push beam of the rock drill.

As shown in fig. 2-3, a limiting part 121 is fixedly arranged on one side of the movable door 120, which is close to the side plate 112 connected with the movable door, and a limiting pin 122 is connected to the limiting part 121 in a sliding manner. And a matching part 114 is fixedly arranged on the side plate 112 connected with the movable door 120, a guiding inclined plane 115 is arranged on the matching part 114, and a limiting hole 116 is arranged on one side of the guiding inclined plane 115 away from the movable door 120. When the movable door 120 is rotated to the second movable position, one end of the limiting pin 122 contacts and moves along the guide slope 115 of the mating part 114, and finally moves to face the limiting hole 116 and is inserted into the limiting hole 116, thereby limiting the rotation of the protective door by the mating part 114. So, just can make the maintenance passageway 110d keep open, make things convenient for maintenance in-process maintainer to come in and go out the protection space 110a, avoid dodge gate 120 to rotate because of external wind-force or other exogenic actions and lead to maintenance passageway 110d to seal, ensure that the maintainer can come in and go out maintenance passageway 110d at any time, if the maintenance in-process is unexpected, the maintainer can in time escape out of protection space 110a, ensures the safety of maintainer. In a further embodiment, a return spring 123 is sleeved on the limiting pin 122, one end of the return spring 123 abuts against the limiting pin 122, and the other end abuts against the limiting portion 121.

With the above arrangement, when the movable door 120 moves from the first movable position to the second movable position, the return spring 123 applies pressure to the stopper pin 122 to make it cling to the guide slope 115, and finally ensure that the stopper pin 122 can be inserted into the stopper hole 116. After the overhaul is completed, the protective door can be normally rotated to the first movable position to close the overhaul channel 110d only by pulling the limiting pin 122 to separate from the limiting hole 116, so that the safety in the overhaul process is improved.

Specifically, the protection device 100 further includes: a first locking member 140 and a second locking member 150. Wherein the first locking member 140 is connected to the shield body 110. The second locking member 150 is connected to the movable door 120. The first locking member 140 is engaged with the second locking member 150 when the movable door 120 is in the first movable position to lock the movable door 120 in the first movable position. That is, the service passage 110d can be kept in a closed state, so that the damage to surrounding personnel caused by flying chips and the like in the guard space 110a due to the open service passage 110d when the rock drilling machine is used normally is avoided. In a specific embodiment, the first locking member 140 and the second locking member 150 may be engaged with each other by a buckle and a clasp, a lock and a latch, and a bolt and a screw hole, so long as the locking and unlocking functions for the position of the movable door 120 can be formed.

Specifically, the protection device 100 further includes: trigger 170 and sensor 160. Wherein the trigger is fixedly connected to the shield body 110 and/or the movable door 120. The sensor is fixedly connected to the shield body 110 and/or the movable door 120 such that the trigger is located in the detection area of the sensor when the movable door 120 is in the first active position. The sensor is electrically connected with a controller of driving parts such as a hydraulic cylinder for controlling the driving of the drill rod and the rod changing mechanism in the rock drilling machine, and the motor and the like. That is, when the movable door 120 moves relative to the shroud body 110 to disengage the trigger from the detection area of the sensor, the drill rod, the rod changing mechanism, the working platform, etc. of the rock drilling machine can stop working, thereby avoiding damage to the service personnel caused by continued working of the drill rod, etc. when the service passage 110d is opened. The sensor 160 may be a hall linear sensor 160, and the trigger 170 may be a metal part that can be identified and detected by the hall linear sensor. In view of the problem that the linear sensor is easily affected by other metal substances in the way of matching with the metal piece, so that the sensor is unstable in operation, in this embodiment, the sensor 160 is preferably a proximity sensor, and the trigger piece is the target of the proximity sensor. Adam from ABB corporation, for example, may be used as sensor 160 and Eva may be used as trigger 170, with Adam mounted to the shroud body and Eva mounted to the moveable door to enable monitoring of the position of the moveable door through the cooperation of the two, which is easy to achieve in practical use.

In addition, in order to avoid the sensor malfunction or the drill rod restarting caused by the misoperation of the operator of the rock drilling machine in the overhaul process, a scram switch 180 is fixedly arranged outside the shield body 110, and the scram switch 180 directly controls the driving piece, so that the drill rod and the like can stop working when being pressed down, and the safety of the overhaul personnel is further ensured. In a further aspect, the limiting emergency stop switch 180 is disposed outside the protection space 110a, so that the situation that the drill rod stops working due to the fact that the flying chips touch the emergency stop switch 180 by mistake during the working of the drill rod can be avoided.

Thus, even if the drill rod is restarted during the service process, the service personnel or other people outside the shield body 110 can operate the emergency stop switch 180 more quickly, thereby stopping the drill rod as soon as possible and reducing the injury to the operator.

More specifically, the protection device 100 may be used in the following dangerous situations: the failure of the engagement between the stop pin 122 and the engagement portion 114, or due to mishandling, etc., may result in the closing of the guard door 120 during the service process, at which time the driver of the rock drill may directly start the drill rod, possibly resulting in injury to the service personnel. To reduce the maintenance risk, on the basis that the movable door 120 is rotatably connected to the shield body 110 about the pivot axis 120a, it is defined that the trigger 170 and the sensor 160 are located on the same side of the pivot axis 120a, and that the trigger 170/sensor 160 fixedly provided on the movable door 120 is located at the farthest end of the movable door from the pivot axis 120a, while the emergency stop switch 180 is fixedly provided on the side of the shield body 110 close to the maintenance channel 110d, on the side of the maintenance channel 110d away from the pivot axis 120a, and that the emergency stop switch 180 is adjacent to the maintenance channel 110d and the first equipment channel 110b.

Through the above arrangement, if the movable door 120 is accidentally closed during maintenance, at this time, if the movable door 120 is opened, since the farthest end of the movable door 120 relative to the pivot axis 120a moves along the farthest path when the movable door 120 rotates, the sensor 160 can most sensitively sense the position change of the movable door 120, thereby controlling the drill rod to stop most rapidly, so as to ensure the safety of maintenance personnel. Similarly, when the movable door 120 rotates, the opening between the most distal end of the movable door relative to the pivot axis 120a and the shield body 110 is the largest, so that the emergency stop switch 180 can be easily accessed by an operator, so that the operator or the operator outside the shield body 110 can operate the emergency stop switch, and the damage to the operator can be reduced as much as possible.

In addition, still set up long otter board 190 on protection device 100, this long otter board 190 fixed connection is to the propulsion roof beam side, and the length direction of long otter board 190 is unanimous with the length direction of propulsion roof beam, and the one end of long otter board 190 extends to and contacts with top frame 111 simultaneously, so, can prolong protection device 100's protection scope through long otter board 190, make all kinds of movable spare parts that set up on the propulsion roof beam all receive protection device 100's protection, further strengthen the safety in utilization of rock drilling machine.

As shown in fig. 5, in a second aspect of the utility model, there is also provided in further embodiments a rock drill rig 200 comprising the protection device 100 mentioned in the first aspect of the utility model. Specifically, in order to place the end of the drill rod 220 mounted on the push beam 210 of the rock drilling machine 200 for drilling and the rod changing mechanism 230 used when changing different drill rods 220, the disassembly platform 240 for separating or connecting the driving member from the drill rod 220 is placed inside the shield body 110 during rod changing.

The foregoing description is only of the preferred embodiments of the present disclosure and description of the principles of the technology being employed. It will be appreciated by those skilled in the art that the scope of the utility model in the embodiments of the present disclosure is not limited to the specific combination of the above technical features, but encompasses other technical features formed by any combination of the above technical features or their equivalents without departing from the spirit of the utility model. Such as the above-described features, are mutually substituted with (but not limited to) the features having similar functions disclosed in the embodiments of the present disclosure.

Claims (11)

1. A protection device for constructing a rock drill rig, comprising: a shield body;

wherein the shield body is formed with a guard space accommodating at least a portion of the rock drill;

the method is characterized in that:

the protection device further includes: a movable door;

wherein the shield body is configured to be formed with an inspection passage communicating with the guard space; the movable door is movably connected to the shield body so that the movable door at least has a first movable position and a second movable position relative to the shield body; when the movable door is positioned at the first movable position, the overhaul channel is closed; the access passage is opened when the movable door is in the second movable position.

2. The protection device of claim 1, wherein:

the shield body is provided with a first equipment channel and a second equipment channel, and the first equipment channel and the second equipment channel are respectively arranged on two opposite sides of the shield body in a first direction so that a part of the rock drilling machine passes through the protection space.

3. The protection device of claim 2, wherein:

the service passage is disposed between the first equipment passage and the second equipment passage.

4. A protection device according to claim 3, characterized in that:

the shield body is equipped with first guard portion and second guard portion, first guard portion with the second guard portion sets up respectively the shield body is in with the both sides that the second direction is opposite, the maintenance passageway sets up between first guard portion with the second guard portion.

5. The protection device of claim 4, wherein:

the first direction is perpendicular to the second direction.

6. The protection device according to any one of claims 2 to 5, wherein:

the movable door and the shield body form a rotary connection around a pivot axis.

7. The protection device of claim 6, wherein:

the pivot axis is parallel to the first direction.

8. The protection device according to any one of claims 1 to 5, wherein:

the movable door is at least partially positioned outside the protective space when the movable door is in the second movable position.

9. The protection device according to any one of claims 1 to 5, wherein:

the protection device further includes: a first locking member and a second locking member; wherein the first locking member is connected to the shield body; the second locking piece is connected to the movable door; the first locking member is coupled with the second locking member when the movable door is in the first movable position to lock the movable door in the first movable position.

10. The protection device according to any one of claims 1 to 5, wherein:

the protection device further includes: a trigger and a sensor;

wherein the trigger piece is fixedly connected to the shield body or/and the movable door; the sensor is fixedly connected to the shield body or/and the movable door so that the trigger is located in a detection area of the sensor when the movable door is in the first movable position.

11. A rock drill rig comprising a protection device according to any one of claims 1 to 10.