Line drawing device for steam pipeline pre-burying

Abstract

The utility model relates to the technical field of steam pipeline pre-burying, in particular to a line drawing device for steam pipeline pre-burying, which comprises a line drawing mechanism comprising a bottom plate, a single wheel and a pair wheel connected with the bottom plate, a storage hopper connected with the bottom plate, and a handle arranged on the bottom plate; the operating mechanism comprises a crushing part arranged on the storage hopper and an opening and closing part connected with the storage hopper, the opening and closing degree of an opening and closing assembly is controlled by operating a transmission assembly, then the discharging amount of lime is controlled, a user does not need to squat down for operation, and the operation convenience is improved; lime is guided to the filter screen plate through the inclined guide plate, and the power assembly reciprocates to extrude and crush lime blocks, so that the lime blocks are prevented from influencing discharging, and smooth operation is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of pre-buried steam pipelines, in particular to a marking device for pre-buried steam pipelines. Background Art

[0002] Before the steam pipeline is buried underground, a marking device is generally used to mark the ground to prevent the trench for burying the pipe from being offset or inaccurate. A lime marking vehicle is a tool commonly used for marking. The user puts lime powder into a box and then pushes the lime marking vehicle to move over the area that needs to be marked. During the movement, the lime powder is released from the box and sprinkled on the ground to form straight lines or curves for marking.

[0003] The discharge adjustment structure of the existing lime marking vehicle is arranged below the storage hopper, and the user needs to squat to operate it. Moreover, lime is a hygroscopic substance, which is easy to agglomerate after being damp, affecting the discharge, which brings inconvenience to the use. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the above-mentioned problems that the user needs to squat to operate the discharging adjustment structure and the lime is easy to clump after being damp, which will bring inconvenience to the use, the present utility model is proposed.

[0006] Therefore, the utility model aims to provide a steam pipeline pre-buried marking device.

[0007] In order to solve the above technical problems, the utility model provides the following technical solutions: a marking device for pre-buried steam pipes, comprising a marking mechanism, including a bottom plate, a single wheel and a pair of wheels connected to the bottom plate, a storage hopper connected to the bottom plate, and a handle arranged on the bottom plate; an operating mechanism, including a crushing component arranged on the storage hopper, and an opening and closing component connected to the storage hopper.

[0008] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the crushing component includes a filter screen plate arranged in the storage hopper, a power component connected to the storage hopper, an inclined guide plate arranged in the storage hopper, and a closing component connected to the storage hopper.

[0009] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the power assembly includes an extrusion plate slidably connected to the storage hopper, a hinge seat connected to the extrusion plate, and a push-pull rod connected to the hinge seat; wherein the push-pull rod is an "L"-shaped rod, and the extrusion plate is connected to the hinge seat through a mounting piece.

[0010] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the closing component includes a closing door panel hinged to the storage hopper, a mounting platform arranged on the storage hopper, and a blocking frame rotatably connected to the mounting platform.

[0011] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the blocking frame is composed of two cross bars and two bending bars, and one end of the bending bar close to the closed door plate is parallel to the closed door plate.

[0012] As a preferred solution of the marking device for pre-embedded steam pipes of the utility model, the mounting part includes an insertion rod connected to a hinged seat, a limit plate arranged on the insertion rod, a circular ring connected to the extrusion plate, a lifting block arranged on the inner wall of the circular ring, a swivel connected to the extrusion plate, a lifting rod connected to the swivel, a mounting frame connected to the swivel, and a reset spring coaxially arranged with the lifting rod.

[0013] As a preferred solution of the marking device for pre-buried steam pipes of the utility model, a positioning groove is provided on the lifting block, and the cross-sections of the limiting plate and the lifting rod are both "J"-shaped.

[0014] As a preferred solution of the steam pipeline pre-buried marking device of the utility model, the opening and closing component includes an opening and closing assembly connected to the storage hopper, and a transmission assembly connected to the opening and closing assembly.

[0015] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the opening and closing assembly includes an opening and closing plate connected to the storage hopper, a rack connected to the opening and closing plate, and a gear meshing with the rack.

[0016] As a preferred solution of the steam pipe pre-buried marking device of the utility model, the transmission assembly includes a transmission rod connected to the gear, a first pulley connected to the transmission rod, a transmission belt connected to the first pulley, a second pulley connected to the transmission belt, and a rotating rod connected to the second pulley.

[0017] The beneficial effects of the utility model are as follows: the utility model controls the opening and closing degree of the opening and closing component by operating the transmission component, thereby controlling the discharge amount of lime, and does not require the user to squat to operate, thereby improving the convenience of operation; the lime is guided to the filter screen plate by the inclined guide plate, and the power component reciprocates to squeeze and crush the lime blocks, thereby preventing the lime from agglomerating and affecting the discharge, thereby ensuring smooth work. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 The present invention is an overall schematic diagram of a marking device for pre-buried steam pipes from a front side perspective.

[0020] Figure 2 This is an overall schematic diagram of a marking device for pre-buried steam pipes from a rear side perspective.

[0021] Figure 3 The present invention is a cross-sectional schematic diagram of a marking device for pre-buried steam pipes.

[0022] Figure 4 The present invention is a schematic diagram of the push-pull rod connection of a marking device for pre-buried steam pipes.

[0023] Figure 5 The present invention is a schematic diagram of a closing assembly of a marking device for pre-buried steam pipes.

[0024] Figure 6 The present invention is a first cross-sectional schematic diagram of a mounting component of a marking device for pre-buried steam pipes.

[0025] Figure 7 The second cross-sectional schematic diagram is a mounting part of a marking device for pre-buried steam pipes.

[0026] Figure 8 The present invention is a schematic diagram of the opening and closing components of a marking device for pre-buried steam pipes. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0031] Example 1

[0032] Reference Figure 1-Figure 5 , which is the first embodiment of the utility model, and provides a marking device for pre-buried steam pipelines, including a marking mechanism 100, which uses lime to draw straight lines or curves on the ground to mark the excavation range of the trench, including a bottom plate 101, wherein the bottom plate 101 provides a position for the installation of other parts, a single wheel 102 and a pair of wheels 103 rotatably connected to the bottom plate 101, wherein the single wheel 102 and the pair of wheels 103 enable the marking mechanism 100 to move, and a storage hopper fixedly connected to the bottom plate 101 104, a through groove matching the discharge port of the storage hopper 104 is provided on the bottom plate 101, wherein the storage hopper 104 is used to store lime, a handle 105 is arranged on the bottom plate 101, wherein the user controls the moving direction of the marking mechanism 100 through the handle 105; an operating mechanism 200, including a crushing component 201 arranged on the storage hopper 104, wherein the crushing mechanism is used to process agglomerated lime, and an opening and closing component 202 connected to the storage hopper 104, wherein the opening and closing component 202 is used to control the discharge amount of the storage hopper 104.

[0033] Specifically, the crushing component 201 includes a filter screen 201a fixedly mounted in the storage hopper 104, wherein the filter screen 201a is used to filter the crushed lime, and the lime with smaller particles passes through the filter screen 201a and falls into the lower part of the storage hopper 104, and the lime with larger particles is intercepted by the filter screen 201a and remains on the filter screen 201a; a power component 201b connected to the storage hopper 104, wherein the power component 201b is used to crush the lime; an inclined guide plate 201c fixedly mounted on the inner wall of the storage hopper 104, wherein the inclined guide plate 201c is used to guide the lime to fall on the filter screen 201a; and a closing component 201d connected to the storage hopper 104, wherein the closing component 201d controls the opening and closing of the side of the storage hopper 104, and the lime with larger particles can be taken away after opening.

[0034] Furthermore, the power assembly 201b includes an extrusion plate 201b-1 slidably connected to the storage hopper 104, the extrusion plate 201b-1 is located between the inclined guide plate 201c and the filter screen plate 201a, and the side of the extrusion plate 201b-1 is in contact with the inner wall of the storage hopper 104, and the agglomerated lime is broken when the extrusion plate 201b-1 moves back and forth, and the articulated seat 201b-2 connected to the extrusion plate 201b-1 and the push-pull rod articulated to the articulated seat 201b-2 are connected to the extrusion plate 201b-1. 201b-3; wherein the push-pull rod 201b-3 is an "L"-shaped rod, wherein the long rod of the push-pull rod 201b-3 is hinged to the hinge seat 201b-2, and the short rod of the push-pull rod 201b-3 is inserted into the wheelbarrow 102 and is rotatably connected to the wheelbarrow 102. When the wheelbarrow 102 rolls, the wheelbarrow 102 drives the extrusion plate 201b-1 to move back and forth through the push-pull rod 201b-3, and the extrusion plate 201b-1 is connected to the hinge seat 201b-2 through the mounting member 201b-4.

[0035] Furthermore, the closing component 201d includes two closing door panels 201d-1 hinged to the storage hopper 104, wherein the closing door panels 201d-1 control the opening and closing of the sides of the storage hopper 104, a mounting platform 201d-2 fixedly mounted on the storage hopper 104, and a blocking frame 201d-3 rotatably connected to the mounting platform 201d-2, wherein the blocking frame 201d-3 is used to limit the closing door panels 201d-1, and the closing door panels 201d-1 can be opened only after the blocking frame 201d-3 is rotated and lifted.

[0036] Furthermore, the blocking frame 201d-3 is composed of two cross bars and two bending bars, and one end of the bending bar close to the closed door plate 201d-1 is parallel to the closed door plate 201d-1. The closed door plate 201d-1 is limited by the blocking frame 201d-3 to prevent the closed door plate 201d-1 from being knocked open by the extrusion plate 201b-1.

[0037] Operation process: When not in use, the squeezing plate 201b-1 can be inserted to the deepest part of the storage hopper 104 to completely cover the filter screen plate 201a, and the lime can be put in from the upper end of the storage hopper 104. At this time, the lime will be stored in the upper part of the storage hopper 104. If the lime is damp and agglomerated, in the process of pushing the line drawing mechanism 100, the rolling of the wheel 102 will drive the push-pull rod 201b-3 to swing back and forth, and then drive the squeezing plate 201b-1 to move back and forth through the hinge seat 201b-2. The squeezing plate 201b-1 moves back and forth to break the agglomerated lime, and the smaller lime particles fall into the storage through the filter screen plate 201a. At the lower part of the hopper 104, the lime with larger particles is intercepted by the filter mesh plate 201a and remains on the filter mesh plate 201a. At the same time, the closed door plate 201d-1 is limited by the blocking frame 201d-3 to prevent the closed door plate 201d-1 from being knocked open by the extrusion plate 201b-1. After the marking mechanism 100 stops moving, the blocking frame 201d-3 can be rotated and lifted to open the closed door. At this time, the lime with larger particles can be cleaned up to prevent affecting the filtering effect of the filter mesh plate 201a. Finally, the discharge amount and discharge width of the storage hopper 104 can be controlled by the opening and closing component 202 to facilitate marking.

[0038] Example 2

[0039] Reference Figure 6-Figure 7 , which is the second embodiment of the utility model. This embodiment is different from the first embodiment in that the mounting member 201b-4 includes an insertion rod 201b-4a fixedly connected to the hinge seat 201b-2, wherein an insertion hole matching the insertion rod 201b-4a is provided on the extrusion plate 201b-1, an inner groove is provided on the circumferential side of the insertion rod 201b-4a, a plurality of limit plates 201b-4b fixedly arranged on the inner groove of the insertion rod 201b-4a, a circular ring 201b-4c fixedly connected to the extrusion plate 201b-1, a plurality of lifting blocks 201b-4d fixedly arranged on the inner wall of the circular ring 201b-4c, and a plurality of lifting blocks 201b-4d are evenly arrayed on the inner wall of the circular ring 201b-4c, wherein the lifting rod 201b-4f rotates with the lifting block 201b-4d. The inclined surface of the lifting block 201b-4d causes the lifting rod 201b-4f to slide into the inner groove of the insertion rod 201b-4a, and the swivel 201b-4e is rotatably connected to the extrusion plate 201b-1, and a plurality of lifting rods 201b-4f are slidably connected to the swivel 201b-4e, wherein the lifting rod 201b-4f is driven to rotate together with the swivel 201b-4e, and the mounting frame 201b-4g is fixedly connected to the swivel 201b-4e, and the return spring 201b-4h is coaxially arranged with the lifting rod 201b-4f, wherein the return spring 201b-4h is located between the mounting frame 201b-4g and the swivel 201b-4e, and when the lifting rod 201b-4f slides toward the insertion rod 201b-4a, the return spring 201b-4h is compressed.

[0040] Specifically, a positioning groove is provided on the lifting block 201b-4d, and the lifting rod 201b-4f will be limited when it rotates into the positioning groove. The cross-sections of the limiting plate 201b-4b and the lifting rod 201b-4f are both "J"-shaped, and the hooks of the limiting plate 201b-4b and the lifting rod 201b-4f are staggered with each other to achieve the purpose of limiting. If the limiting plate 201b-4b breaks, the lifting rod 201b-4f will be limited by the inner groove of the insertion rod 201b-4a to prevent the hinge seat 201b-2 from suddenly separating from the extrusion plate 201b-1, and it can still be used for a period of time.

[0041] The rest of the structure is the same as that of Example 1.

[0042] Operation process: In order to avoid the noise caused by the single wheel 102 driving the crushing component 201 to work during the normal marking process of the marking mechanism 100, and to extend the service life of the crushing component 201, after the crushing of the agglomerated lime is completed, the user can remove the hinge seat 201b-2 from the squeezing plate 201b-1, remove the push-pull rod 201b-3 from the single wheel 102, and finally push the squeezing plate 201b-1 into the deepest part of the storage hopper 104, so that the squeezing plate 201 b-1 stops working to extend the service life; specifically, the user uses a thin rod-shaped object to move the connection between the rotating ring 201b-4e and the mounting bracket 201b-4g, so that the rotating ring 201b-4e rotates forward, and at the same time, the rotating ring 201b-4e drives the lifting rod 201b-4f to rotate together. Due to the influence of external force, the lifting rod 201b-4f rotates out of the positioning groove, and the return spring 201b-4h returns to its original state, so that the lifting rod 201b-4f is always connected with the lifting block 2 01b-4d or the ring 201b-4c fits, with the rotation of the lifting rod 201b-4f, when the lifting rod 201b-4f fits with the plane of the positioning groove, the limit plate 201b-4b and the hook of the lifting rod 201b-4f are misaligned up and down, when the lifting rod 201b-4f fits with the inclined surface of the positioning groove, the lifting rod 201b-4f moves away from the insertion rod 201b-4a, the limit plate 201b-4b and the hook of the lifting rod 201b-4f are separated, and the lifting rod The hook of 201b-4f is moved out from the inner groove. At this time, the insertion rod 201b-4a can be pulled out from the insertion hole, the hinge seat 201b-2 can be removed from the extrusion plate 201b-1, and then the push-pull rod 201b-3 can be pulled out from the wheelbarrow 102. If the extrusion plate 201b-1 and the hinge seat 201b-2 are to be connected together through the mounting member 201b-4, the insertion rod 201b-4a is inserted into the insertion hole and the swivel 201b-4e is rotated in the opposite direction.

[0043] Example 3

[0044] Reference Figure 8, which is the third embodiment of the utility model. This embodiment is different from the above embodiments in that: the opening and closing component 202 includes an opening and closing assembly 202a connected to the storage hopper 104, wherein the opening and closing component 202 is used to control the discharge amount and discharge width of the storage hopper 104, and a transmission assembly 202b connected to the opening and closing assembly 202a, wherein the transmission assembly 202b is used for the user to operate the opening and closing component 202, and the user does not need to squat to operate.

[0045] Specifically, the opening and closing assembly 202a includes two opening and closing plates 202a-1 that are slidably connected to the storage hopper 104. The storage hopper 104 assists and limits the moving direction of the opening and closing plates 202a-1. The two opening and closing plates 202a-1 move toward or oppositely, thereby controlling the opening and closing of the discharge port of the storage hopper 104. A rack 202a-2 is fixedly connected to the opening and closing plates 202a-1, and a gear 202a-3 meshing with the rack 202a-2, wherein the gear 202a-3 cooperates with the two racks 202a-2 to make the two opening and closing plates 202a-1 move toward or oppositely.

[0046] Furthermore, the transmission assembly 202b includes a transmission rod 202b-1 fixedly connected to the gear 202a-3, wherein the rotating rod is rotatably connected to the base plate 101, a first pulley 202b-2 fixedly connected to the transmission rod 202b-1, a transmission belt 202b-3 connected to the first pulley 202b-2, a second pulley 202b-4 connected to the transmission belt 202b-3, and a rotating rod 202b-5 connected to the second pulley 202b-4, wherein the rotating rod 202b-5 is rotatably connected to the base plate 101.

[0047] The rest of the structure is the same as that of Example 2.

[0048] Operation process: the user operates the rotating rod 202b-5, the rotating rod 202b-5 drives the second pulley 202b-4 to rotate, and the second pulley 202b-4 drives the first pulley 202b-2 to rotate through the transmission belt 202b-3. The rotation of the first pulley 202b-2 will drive the transmission rod 202b-1 to rotate, and the rotation of the transmission rod 202b-1 will drive the gear 202a-3 to rotate, and then the rack 202a-2 engaged with the gear 202a-3 will move. At this time, the two opening and closing plates 202a-1 move toward or oppositely according to the rotation direction of the rotating rod 202b-5, thereby controlling the opening and closing of the discharge port of the storage hopper 104. The discharge port of the storage hopper 104 is opened to allow lime to fall, and the user pushes the marking mechanism 100 to move the spilled lime to form a mark on the ground.

[0049] Importantly, it should be noted that the construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and ratio of various elements, and parameter values ​​(e.g., temperature, pressure, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present invention, other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the present invention is not limited to a specific embodiment, but extends to various modifications that still fall within the scope of the appended claims.

[0050] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0051] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0052] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A marking device for pre-buried steam pipelines, characterized in that: include, A marking mechanism (100) comprises a bottom plate (101), a single wheel (102) and a pair of wheels (103) connected to the bottom plate (101), a storage hopper (104) connected to the bottom plate (101), and a handle (105) arranged on the bottom plate (101); The operating mechanism (200) comprises a crushing component (201) arranged on the storage hopper (104), and an opening and closing component (202) connected to the storage hopper (104).

2. The steam pipeline pre-buried marking device according to claim 1, characterized in that: The crushing component (201) comprises a filter screen (201a) disposed in the storage hopper (104), a power component (201b) connected to the storage hopper (104), an inclined guide plate (201c) disposed in the storage hopper (104), and a closing component (201d) connected to the storage hopper (104).

3. The steam pipeline pre-buried marking device according to claim 2, characterized in that: The power assembly (201b) comprises an extrusion plate (201b-1) slidably connected to the storage hopper (104), a hinge seat (201b-2) connected to the extrusion plate (201b-1), and a push-pull rod (201b-3) connected to the hinge seat (201b-2); Wherein, the push-pull rod (201b-3) is an "L"-shaped rod, and the extrusion plate (201b-1) and the hinge seat (201b-2) are connected via a mounting member (201b-4).

4. The steam pipeline pre-buried marking device according to claim 3, characterized in that: The closing assembly (201d) comprises a closing door panel (201d-1) hinged to the storage hopper (104), a mounting platform (201d-2) disposed on the storage hopper (104), and a blocking frame (201d-3) rotatably connected to the mounting platform (201d-2).

5. The steam pipeline pre-buried marking device according to claim 4, characterized in that: The blocking frame (201d-3) is composed of two cross bars and two bending bars, and one end of the bending bar close to the closed door plate (201d-1) is parallel to the closed door plate (201d-1).

6. The marking device for pre-buried steam pipes according to claim 5, characterized in that: The mounting member (201b-4) comprises an insertion rod (201b-4a) connected to the hinge seat (201b-2), a limit plate (201b-4b) arranged on the insertion rod (201b-4a), a circular ring (201b-4c) connected to the extrusion plate (201b-1), a lifting block (201b-4d) arranged on the inner wall of the circular ring (201b-4c), a rotating ring (201b-4e) connected to the extrusion plate (201b-1), a lifting rod (201b-4f) connected to the rotating ring (201b-4e), a mounting frame (201b-4g) connected to the rotating ring (201b-4e), and a return spring (201b-4h) coaxially arranged with the lifting rod (201b-4f).

7. The steam pipeline pre-buried marking device according to claim 6, characterized in that: The lifting block (201b-4d) is provided with a positioning groove, and the cross-sections of the limiting plate (201b-4b) and the lifting rod (201b-4f) are both "J"-shaped.

8. The marking device for pre-buried steam pipes according to claim 1 or 7, characterized in that: The opening and closing component (202) comprises an opening and closing assembly (202a) connected to the storage hopper (104), and a transmission assembly (202b) connected to the opening and closing assembly (202a).

9. The marking device for pre-buried steam pipes according to claim 8, characterized in that: The opening and closing assembly (202a) comprises an opening and closing plate (202a-1) connected to the storage hopper (104), a rack (202a-2) connected to the opening and closing plate (202a-1), and a gear (202a-3) meshing with the rack (202a-2).

10. The marking device for pre-buried steam pipes according to claim 9, characterized in that: The transmission assembly (202b) comprises a transmission rod (202b-1) connected to a gear (202a-3), a first pulley (202b-2) connected to the transmission rod (202b-1), a transmission belt (202b-3) connected to the first pulley (202b-2), a second pulley (202b-4) connected to the transmission belt (202b-3), and a rotating rod (202b-5) connected to the second pulley (202b-4).

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