Surveying and mapping device for land engineering

Abstract

The utility model relates to the technical field of land engineering, and provides a land engineering surveying and mapping device which comprises a supporting bottom plate and a surveying and mapping instrument, three first supporting legs evenly distributed in the circumferential direction are rotatably installed at the lower end of the supporting bottom plate, and second supporting legs are slidably installed on the first supporting legs; a first limiting bolt used for limiting mutual movement of the first supporting leg and the second supporting leg is arranged between the first supporting leg and the second supporting leg, the surveying and mapping instrument is installed on an adjusting plate, and a leveling mechanism used for leveling the surveying and mapping instrument is arranged between the adjusting plate and the supporting bottom plate. The surveying and mapping instrument is fixed through the first limiting bolt, horizontal coarse adjustment of the surveying and mapping instrument is achieved, then the surveying and mapping instrument is finely adjusted through the leveling mechanism, the leveling efficiency and precision of the surveying and mapping instrument are improved, operation is easy and fast, stability is high, and the surveying and mapping instrument leveling device is suitable for being used in different scenes.

Description

TECHNICAL FIELD

[0001] The utility model belongs to land engineering technical field, especially relate to a surveying and mapping device for land engineering. BACKGROUND

[0002] Land use engineering is the general term of various engineering related to land development and utilization, management and reconstruction, protection and management, and engineering surveying and mapping device such as theodolite and level is usually used in combination with tripod and surveying and mapping device, and it is necessary to carry the tripod and various instruments to the detection site for surveying and mapping.

[0003] The patent with the application number 2021221854534 discloses a surveying and mapping device based on land engineering, relating to the technical field of surveying and mapping, to solve the problem that the existing surveying and mapping device for land engineering is inconvenient to recycle and is prone to falling off during use, comprising a main body; the main body is in cylindrical structure; a moving structure is arranged below the main body; an adjusting structure is arranged at the middle position below the main body, and a rotating shaft is inserted into the circular hole at the bottom of the main body. By pulling the clamping piece, the clamping piece slides in the moving groove, the spring in the moving groove is retracted, the top end of the clamping piece is pulled out from the bottom of the limiting piece, the rotating groove at the bottom of the limiting piece rotates around the rotating column in the inner groove, the moving piece is released from the limiting position, and the moving piece is adjusted to be perpendicular to the ground. After the limiting piece is reinserted into the inner groove, the limiting piece is limited by the clamping piece, and the limiting and recycling are facilitated, but when used in uneven terrain, the surveying and mapping instrument is offset, which affects the accuracy of surveying and mapping, and it is inconvenient to level. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a surveying and mapping device for land engineering, which is simple and convenient to operate, has strong stability, and is suitable for different scenes.

[0005] The technical scheme is as follows: a surveying and mapping device for land engineering, comprising a support bottom plate and a surveying and mapping instrument, the lower end of the support bottom plate is rotatably installed with three first support legs which are uniformly distributed in the circumferential direction, a second support leg is slidably installed on the first support leg, a first limiting bolt is arranged between the first support leg and the second support leg to limit the mutual movement of the two, the surveying and mapping instrument is installed on an adjusting plate, and a leveling mechanism is arranged between the adjusting plate and the support bottom plate to level the surveying and mapping instrument.

[0006] The above technical scheme has the following advantages in use: the second supporting leg is slid along the first supporting leg, and the two are fixed through the first limiting bolt, so that the surveying instrument is coarsely adjusted horizontally, then the surveying instrument is finely adjusted through the leveling mechanism, the leveling efficiency and accuracy of the surveying instrument are improved, the operation is simple and fast, the stability is high, and the leveling mechanism is suitable for different scenes.

[0007] Preferably, the leveling mechanism comprises a supporting frame fixedly installed at the middle position of the upper end of the supporting base plate, a spherical groove is formed in the supporting frame, a ball is fixedly arranged at the middle position of the lower end of the adjusting plate and movably installed in the spherical groove, and at least three adjusting bolts are threadedly installed on the side surface of the adjusting plate and uniformly distributed in the circumferential direction.

[0008] Preferably, the number of the adjusting bolts is four, and the four adjusting bolts are uniformly distributed in the circumferential direction on the adjusting plate.

[0009] Preferably, an adjusting frame is fixedly arranged on the adjusting plate, a first screw hole is formed in the adjusting frame, the adjusting bolt is threadedly installed in the first screw hole, a hemispherical part is fixedly arranged at one end of the adjusting bolt close to the supporting base plate, and the hemispherical part is tangent to the upper end surface of the supporting base plate.

[0010] Preferably, the depth of the spherical groove in the supporting frame is 2 / 3 of the ball, and the ball is prevented from being separated from the spherical groove by the supporting frame.

[0011] Preferably, a pin shaft is arranged at the lower end surface of the supporting base plate and uniformly distributed in the circumferential direction, a pin hole is formed in each of the three first supporting legs, the pin shaft is rotatably installed in the pin hole, a first sliding groove is formed in the first supporting leg, a first sliding frame is fixedly arranged on the second supporting leg and slidably installed in the first sliding groove, a ground insertion nail is arranged at the lower end of the second supporting leg, and the first limiting bolt is threadedly installed on the first supporting leg and in communication with the first sliding groove.

[0012] Preferably, an installation plate is rotatably installed on the adjusting plate, the surveying instrument is detachably installed on the installation plate, and a limiting mechanism for limiting the rotation of the installation plate and the adjusting plate is arranged between the installation plate and the adjusting plate.

[0013] Preferably, the limiting mechanism comprises an annular limiting tooth fixedly installed at the upper end of the adjusting plate, a first rotating shaft is rotatably installed at the middle position of the upper end of the adjusting plate, the upper end of the first rotating shaft is fixedly connected with the lower end surface of the installation plate, a second screw hole and a guide hole are formed in the installation plate, an arc-shaped limiting tooth corresponding to the annular limiting tooth is slidably installed on the installation plate, a second limiting bolt is rotatably installed at the upper end of the arc-shaped limiting tooth and threadedly installed in the second screw hole, and a guide rod is fixedly arranged at the upper end of the arc-shaped limiting tooth and slidably installed in the guide hole.

[0014] The above technical scheme has the following beneficial effects in use: the second limiting bolt is operated to drive the arc-shaped limiting teeth to disengage from the annular limiting teeth, the mounting plate is operated to rotate along the adjusting plate, the surveying and mapping instrument is rotated, and the mounting plate is adjusted to a suitable angle; the second limiting bolt is operated to drive the arc-shaped limiting teeth to engage with the annular limiting teeth, and the mounting plate is limited, thereby improving the convenience of use of the surveying and mapping instrument and the stability of the angle conversion of the surveying and mapping instrument.

[0015] Preferably, a mounting groove is formed in the mounting plate, a connecting rod is arranged at the lower end of the surveying and mapping instrument, a disc is arranged on the connecting rod, and a clamping mechanism for fixing the connecting rod and the disc in the mounting groove is arranged on the mounting plate.

[0016] Preferably, the clamping mechanism comprises a plurality of first piston cavities that are uniformly distributed on the mounting plate, the first piston cavities are in sealed communication with each other through a gas conveying cavity formed in the mounting plate, a first piston plate is sealingly and slidably arranged in the first piston cavities, an elastic component is arranged between the first piston plate and the first piston cavities, a clamping rod for clamping the connecting rod is arranged on the first piston plate, a second piston cavity is formed at the lower end of the mounting plate, a third screw hole is arranged at the end of the second piston cavity, a second piston plate is sealingly and slidably arranged in the second piston cavity, a clamping bolt that is screwed into the third screw hole is rotatably arranged on the second piston plate, and the second piston cavity is in sealed communication with the gas conveying cavity.

[0017] The above technical scheme has the following beneficial effects in use: the connecting rod and the disc of the surveying and mapping instrument are placed in the mounting groove of the mounting plate, the clamping bolt is operated to drive the second piston plate to move along the second piston cavity, the gas pressure in the second piston cavity, the gas conveying cavity and the first piston cavity is compressed through the second piston plate, the first piston plate is driven to move along the first piston cavity, the connecting rod is clamped and fixed through the clamping rod, and the elastic component is stretched; when disassembly is needed, the clamping bolt is operated to drive the second piston plate to reset, and the clamping rod is driven to reset under the action of the elastic component, thereby conveniently installing and dismounting the surveying and mapping instrument and being suitable for clamping and fixing different surveying and mapping products.

[0018] After the above technical scheme is adopted, the utility model has the following beneficial effects:

[0019] 1. The second support leg is operated to slide along the first support leg, and the two are fixed through the first limiting bolt, thereby coarsely adjusting the level of the surveying and mapping instrument, and then finely adjusting the surveying and mapping instrument through the leveling mechanism, thereby improving the efficiency and precision of leveling the surveying and mapping instrument, and being simple and fast to operate, stable and suitable for use in different scenes.

[0020] 2. The arc-shaped limiting teeth are driven out of the ring-shaped limiting teeth by operating the second limiting bolt, the mounting plate is rotated along the adjusting plate, the surveying and mapping instrument is rotated, the appropriate angle is adjusted, the arc-shaped limiting teeth are matched with the ring-shaped limiting teeth by operating the second limiting bolt, and the limiting of the mounting plate is realized, the convenient performance of the surveying and mapping instrument is improved, and the stability of the angle conversion of the surveying and mapping instrument is improved;

[0021] 3. The connecting rod and the disc of the surveying and mapping instrument are placed in the mounting groove of the mounting plate, the second piston plate is moved along the second piston cavity by operating the clamping bolt, the gas pressure in the second piston cavity, the gas cavity and the first piston cavity is compressed through the second piston plate, the first piston plate is moved along the first piston cavity, the connecting rod is clamped and fixed through the clamping rod, and the elastic component is stretched, when disassembly is needed, the second piston plate is reset by operating the clamping bolt, the clamping rod is reset under the action of the elastic component, the surveying and mapping instrument is conveniently mounted and dismounted, and the clamping and fixing of different surveying and mapping products are suitable. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor under the premise of the drawings.

[0023] Figure 1 It is a perspective view of the present application;

[0024] Figure 2 It is a front view of the present application;

[0025] Figure 3 It is a sectional view of the present application;

[0026] Figure 4 It is an explosion view of the present application;

[0027] Figure 5 It is a local explosion view of the present application;

[0028] Figure 6 It is an explosion view of the leveling mechanism of the present application;

[0029] Figure 7 It is a perspective view of the clamping mechanism in the third embodiment of the present application;

[0030] Figure 8 It is an explosion view of the clamping mechanism in the third embodiment of the present application;

[0031] Figure 9The utility model discloses a section view of the clamping mechanism in the third embodiment of the utility model,

[0032] In the figure, 1, support base plate, 2, pin shaft, 3, support frame, 4, spherical groove, 5, adjusting plate, 6, adjusting frame, 7, first screw hole, 8, ball, 9, adjusting bolt, 10, first rotation shaft, 11, annular limit tooth, 12, first support leg, 13, pin hole, 14, first sliding groove, 15, first limit bolt, 16, second support leg, 17, first sliding frame, 18, ground stake, 19, mounting plate, 20, second screw hole, 21, guide hole, 22, mounting groove, 23, gas conveying cavity, 24, first piston cavity, 25, sliding hole, 26, second piston cavity, 27, third screw hole, 28, second piston plate, 29, clamping bolt, 30, first piston plate, 31, clamping rod, 32, elastic component, 33, surveying and mapping instrument, 34, connecting rod, 35, disc, 36, arc limit tooth, 37, second limit bolt, 38, guide rod, DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. EMBODIMENT

[0034] As Figures 1 to 9 shown, a surveying and mapping device for land engineering includes support base plate 1 and surveying and mapping instrument 33, three circumferentially uniformly distributed first support legs 12 are rotatably installed at the lower end of support base plate 1, second support legs 16 are slidably installed on the first support legs 12, first limit bolts 15 for limiting the mutual movement of the first support legs 12 and the second support legs 16 are arranged between the first support legs 12 and the second support legs 16, surveying and mapping instrument 33 is installed on adjusting plate 5, and leveling mechanism for leveling surveying and mapping instrument 33 is arranged between adjusting plate 5 and support base plate 1.

[0035] The leveling mechanism comprises a support frame 3 fixedly installed at the middle position of the upper end of the support base plate 1, a spherical groove 4 is formed in the support frame 3, a ball 8 movably installed in the spherical groove 4 is fixedly arranged at the middle position of the lower end of the adjusting plate 5, at least three adjusting bolts 9 are screw-installed on the side surface of the adjusting plate 5 and are uniformly distributed in the circumferential direction, an adjusting frame 6 is fixedly arranged on the adjusting plate 5, a first screw hole 7 is formed in the adjusting frame 6, the adjusting bolt 9 is screw-installed in the first screw hole 7, a hemispherical part is fixedly arranged at the end of the adjusting bolt 9 close to the support base plate 1, the hemispherical part is tangent to the upper end surface of the support base plate 1, the depth of the spherical groove 4 in the support frame 3 is 2 / 3 of the ball 8, and the ball 8 is prevented from being separated from the spherical groove 4 by the support frame 3.

[0036] In actual operation: the plurality of adjusting bolts 9 are operated respectively, the ball on the adjusting plate 5 is driven to rotate along the spherical groove 4 on the support base plate 1 by the adjusting bolt 9, the function of precisely leveling the adjusting frame 6 is realized, the ball 8 is prevented from being separated from the spherical groove 4 by the support frame 3, the stability of leveling is improved, the efficiency and precision of leveling of the surveying instrument 33 are improved, the operation is simple and fast, the stability is strong, and the leveling mechanism is suitable for use in different scenes.

[0037] The lower end surface of the support base plate 1 is provided with three pin shafts 2 uniformly distributed in the circumferential direction, pin holes 13 are formed in the three first support legs 12, the pin shafts 2 are rotatably installed in the pin holes 13, a first sliding groove 14 is formed in the first support leg 12, a first sliding frame 17 slidingly installed in the first sliding groove 14 is fixedly arranged on the second support leg 16, the lower end of the second support leg 16 is provided with a ground plug 18, a first limiting bolt 15 is screw-installed on the first support leg 12 and communicates with the first sliding groove 14, the first sliding groove 14 has a cross section in the shape of a Chinese character'shí', and the second support leg 16 and the first sliding frame 17 are slidingly installed in the first sliding groove 14.

[0038] In actual operation: the first limiting bolt 15 is operated to release the limitation between the second support leg 16 and the first support leg 12, the second support leg 16 is operated to drive the first sliding frame 17 to move along the first sliding groove 14 on the first support leg 12, the three second support legs 16 can be adjusted to appropriate heights according to the needs of the scene, and the first limiting bolt 15 is used for limiting and fixing the two, so that the levelness of the surveying instrument 33 is coarsely adjusted.

[0039] The mounting plate 19 is rotatably mounted on the adjusting plate 5, and the surveying instrument 33 is detachably mounted on the mounting plate 19. A limiting mechanism for limiting rotation between the mounting plate 19 and the adjusting plate 5 is arranged between the mounting plate 19 and the adjusting plate 5. The limiting mechanism comprises an annular limiting tooth 11 fixedly mounted on the upper end of the adjusting plate 5, a first rotating shaft 10 rotatably mounted on the middle position of the upper end of the adjusting plate 5, and the upper end of the first rotating shaft 10 is fixedly connected with the lower end surface of the mounting plate 19. The second screw hole 20 and the guide hole 21 are formed in the mounting plate 19. The arc-shaped limiting tooth 36 corresponding to the annular limiting tooth 11 is slidably mounted on the mounting plate 19. The upper end of the arc-shaped limiting tooth 36 is rotatably mounted with the second limiting bolt 37 which is threadedly mounted in the second screw hole 20. The upper end of the arc-shaped limiting tooth 36 is fixedly provided with the guide rod 38 slidably mounted in the guide hole 21.

[0040] In actual operation, the arc-shaped limiting tooth 36 is driven by the second limiting bolt 37 to disengage from the annular limiting tooth 11, the mounting plate 19 is rotated along the adjusting plate 5, the surveying instrument 33 is rotated, and is adjusted to a suitable angle. The arc-shaped limiting tooth 36 is driven by the second limiting bolt 37 to engage with the annular limiting tooth 11, and the mounting plate 19 is limited, thereby improving the convenience of use of the surveying instrument 33 and the stability of angle conversion of the surveying instrument 33. Embodiment

[0041] On the basis of the first embodiment, the number of adjusting bolts 9 is four, and the four adjusting bolts 9 are evenly distributed in the circumferential direction on the adjusting plate 5. Embodiment

[0042] On the basis of the first embodiment or the second embodiment, as shown in the figure, Figures 7-9 The mounting plate 19 is provided with a mounting groove 22. The lower end of the surveying instrument 33 is provided with a connecting rod 34. The connecting rod 34 is provided with a disc 35. The mounting plate 19 is provided with a clamping mechanism for fixing the connecting rod 34 and the disc 35 in the mounting groove 22.

[0043] The clamping mechanism comprises a plurality of first piston cavities 24 evenly distributed in the circumferential direction on the mounting plate 19. The plurality of first piston cavities 24 are sealingly communicated through the gas conveying cavity 23 formed in the mounting plate 19. The first piston cavity 24 is sealingly and slidably mounted with a first piston plate 30. The first piston plate 30 and the first piston cavity 24 are provided with an elastic member 32. The first piston plate 30 is provided with a clamping rod for clamping the connecting rod 34. The lower end of the mounting plate 19 is provided with a second piston cavity 26. The end of the second piston cavity 26 is provided with a third screw hole 27. The second piston cavity 26 is sealingly and slidably mounted with a second piston plate 28. The second piston plate 28 is rotatably mounted with a clamping bolt 29 threadedly mounted in the third screw hole 27. The second piston cavity 26 is sealingly communicated with the gas conveying cavity 23.

[0044] Specifically, the first piston cavity 24 is provided with a sliding hole 25, the clamping rod 31 slides through the sliding hole 25, the number of the first piston cavity 24 is preferably six, and the elastic component 32 is a return spring, one end of which is fixedly connected with the first piston plate 30 and the other end of which is fixedly connected with the first piston cavity 24.

[0045] In actual operation, the connecting rod 34 and the disc 35 of the surveying instrument 33 are placed in the mounting groove 22 of the mounting plate 19, the clamping bolt 29 is operated to push the second piston plate 28 to move along the second piston cavity 26, the gas pressure in the second piston cavity 26, the gas cavity 23 and the first piston cavity 24 is compressed through the second piston plate 28, the first piston plate 30 is pushed to move along the first piston cavity 24, the connecting rod 34 is clamped and fixed through the clamping rod 31, and the elastic component 32 is stretched, when disassembly is needed, the second piston plate 28 is reset under the action of the elastic component 32, the clamping rod 31 is reset, the surveying instrument 33 is conveniently installed and dismounted, and the clamping and fixing of different surveying products are suitable.

[0046] The working principle of the utility model is as follows: the first limiting bolt 15 is operated to release the limitation between the second supporting leg 16 and the first supporting leg 12, the second supporting leg 16 drives the first sliding frame 17 to move along the first sliding groove 14 on the first supporting leg 12, three second supporting legs 16 can be adjusted to a suitable height according to the needs of the scene, and the two are limited and fixed through the first limiting bolt 15, the horizontal degree of the surveying instrument 33 is coarsely adjusted, a plurality of adjusting bolts 9 are respectively operated, the ball on the adjusting plate 5 is driven to rotate along the spherical groove 4 on the supporting bottom plate 1 through the adjusting bolt 9, the function of accurately leveling the adjusting frame 6 is realized, the ball body 8 is prevented from separating from the spherical groove 4 through the supporting frame 3, the stability of leveling is improved, the efficiency and precision of leveling of the surveying instrument 33 are improved, the operation is simple and fast, the stability is strong, and the utility model is suitable for use in different scenes.

[0047] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above, and the person skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, the above-mentioned embodiments and the description in the specification only illustrate the principle of the utility model, various changes and improvements of the utility model can be made without departing from the spirit and scope of the utility model, the changes and improvements all fall within the scope of the utility model claimed, and the protection scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. A surveying device for land engineering comprising a support base plate (1) and a surveying instrument (33), characterised in that: The lower end of the support bottom plate (1) is rotatably provided with three first support legs (12) which are uniformly distributed in the circumferential direction, and the first support leg (12) is slidably provided with a second support leg (16), and a first limiting bolt (15) is arranged between the first support leg (12) and the second support leg (16) to limit the mutual movement of the two, and the surveying instrument (33) is arranged on the adjusting plate (5), and a leveling mechanism is arranged between the adjusting plate (5) and the support bottom plate (1) to level the surveying instrument (33), and the leveling mechanism comprises a support frame (3) which is fixedly arranged at the middle position of the upper end of the support bottom plate (1), and a spherical groove (4) is arranged in the support frame (3), and the lower end of the adjusting plate (5) is fixedly provided with a ball (8) which is movably arranged in the spherical groove (4), and at least three adjusting bolts (9) which are uniformly distributed in the circumferential direction are threadedly arranged on the side surface of the adjusting plate (5). The adjusting plate (5) is rotatably provided with a mounting plate (19), and the surveying instrument (33) is detachably arranged on the mounting plate (19), and a limiting mechanism is arranged between the mounting plate (19) and the adjusting plate (5) to limit the rotation of the two. The limiting mechanism comprises an annular limiting tooth (11) which is fixedly arranged at the upper end of the adjusting plate (5), and a first rotating shaft (10) is rotatably arranged at the middle position of the upper end of the adjusting plate (5), and the upper end of the first rotating shaft (10) is fixedly connected with the lower end surface of the mounting plate (19), and a second threaded hole (20) and a guide hole (21) are arranged in the mounting plate (19), and an arc-shaped limiting tooth (36) corresponding to the annular limiting tooth (11) is slidably arranged on the mounting plate (19), and the upper end of the arc-shaped limiting tooth (36) is rotatably provided with a second limiting bolt (37), and the second limiting bolt (37) is threadedly arranged in the second threaded hole (20), and the upper end of the arc-shaped limiting tooth (36) is fixedly provided with a guide rod (38) which is slidably arranged in the guide hole (21). An installation groove (22) is arranged in the mounting plate (19), and a connecting rod (34) is arranged at the lower end of the surveying instrument (33), and a disc (35) is arranged on the connecting rod (34), and a clamping mechanism is arranged on the mounting plate (19) to fix the connecting rod (34) and the disc (35) in the installation groove (22).

2. The surveying apparatus according to claim 1, wherein The number of the adjusting bolts (9) is four, and the four adjusting bolts (9) are uniformly distributed in the circumferential direction on the adjusting plate (5).

3. The surveying apparatus according to claim 1 or 2, wherein An adjusting frame (6) is fixedly arranged on the adjusting plate (5), and a first threaded hole (7) is arranged in the adjusting frame (6), and the adjusting bolt (9) is threadedly arranged in the first threaded hole (7), and one end of the adjusting bolt (9) close to the support bottom plate (1) is fixedly provided with a hemispherical part, and the hemispherical part is tangent to the upper end surface of the support bottom plate (1).

4. The surveying apparatus according to claim 3, wherein The depth of the spherical groove (4) in the support frame (3) is 2 / 3 of the ball (8), and the ball (8) is prevented from being separated from the spherical groove (4) by the support frame (3).

5. The surveying apparatus according to claim 4, wherein The lower end surface of the support bottom plate (1) is provided with three circumferentially uniformly distributed pin shafts (2), pin holes (13) are formed on the three first support legs (12), the pin shafts (2) are rotatably installed in the pin holes (13), first sliding grooves (14) are formed on the first support legs (12), first sliding frames (17) slidingly installed in the first sliding grooves (14) are fixedly arranged on the second support legs (16), the lower ends of the second support legs (16) are provided with ground insertion nails (18), the first limiting bolts (15) are threadedly installed on the first support legs (12) and communicate with the first sliding grooves (14).

6. The surveying apparatus according to claim 1 or 4, wherein The clamping mechanism comprises a plurality of first piston cavities (24) circumferentially uniformly distributed on the mounting plate (19), the plurality of first piston cavities (24) are in sealed communication through the gas conveying cavities (23) formed on the mounting plate (19), the first piston cavities (24) are in sealed sliding installation of the first piston plates (30), the elastic components (32) are arranged between the first piston plates (30) and the first piston cavities (24), the first piston plates (30) are provided with clamping rods for clamping the connecting rods (34), the lower end of the mounting plate (19) is provided with the second piston cavities (26), the end of the second piston cavities (26) is provided with the third screw holes (27), the second piston cavities (26) are in sealed sliding installation of the second piston plates (28), the second piston plates (28) are rotatably installed with the clamping bolts (29) threadedly installed in the third screw holes (27), and the second piston cavities (26) are in sealed communication with the gas conveying cavities (23).

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