CN216843075U

CN216843075U - Intelligent single-well metering device convenient to install

Info

Publication number: CN216843075U
Application number: CN202220656811.7U
Authority: CN
Inventors: 牟亮; 程辉; 滕飞; 高磊; 代明智; 苏明亮
Original assignee: Xinjiang Shengli Tonghai Tianlan Petroleum Technology Service Co ltd
Current assignee: Xinjiang Shengli Tonghai Tianlan Petroleum Technology Service Co ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-06-28
Anticipated expiration: 2032-03-25

Abstract

The utility model discloses an intelligent single-well metering device convenient to installation, including intelligent single-well metering device body and the dial plate of setting on intelligent single-well metering device body, the both sides of intelligent single-well metering device body all are equipped with the connecting pipe, the equal fixedly connected with installation pipe in both sides of intelligent single-well metering device body has seted up first ring channel on the lateral wall of installation pipe, and one side that two first ring channels were kept away from each other all establishes to the opening, and the movable sleeve in the first ring channel is equipped with the sealing washer, two elastic guide mechanisms of the equal fixedly connected with in one side that two sealing washers are close to each other. The utility model discloses be convenient for through the mode of simple push-and-pull, realize the sealing connection between intelligent single-well metering device body and the connecting pipe fast, improve the installation effectiveness, make things convenient for personnel to use, and compression spring's setting for the sealing washer can all the time with connecting pipe in close contact with, improve and connect the leakproofness, satisfy the user demand.

Description

Intelligent single-well metering device convenient to install

Technical Field

The utility model relates to an intelligent individual well metering equipment technical field especially relates to an intelligent individual well metering device convenient to installation.

Background

The intelligent single-well metering device is arranged for metering the oil (liquid) and gas production of one well, and can realize accurate metering, for example, the application number: 201520278775.5 relates to an intelligent single well metering device, including single well metering control module, positioning emission module, the single well metering control module includes chip U1, resistance R1, photoelectric coupler U3, single well meter J ], the positioning emission module includes chip U2. triode Q1, triode Q2, resistance R2, resistance R5, resistance R7, capacitance C1, transmitting antenna B1, the design of positioning emission module is added on the single well metering control module, can launch the position information of the single well metering device, help to analyze the position information of the metering point, facilitate the study of the whole situation of the metering point;

the intelligent single-well metering device who has now, its shortcoming that has the quick installation of being not convenient for, it is fixed that the sealing connection is realized through a plurality of bolts of flange cooperation mostly between current intelligent single-well metering device and the connecting pipe, and the installation effectiveness is low, and sealed effect is relatively poor, can not satisfy the user demand, therefore we have proposed an intelligent single-well metering device convenient to installation and be used for solving above-mentioned problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing an intelligent single-well metering device convenient to install.

In order to realize the purpose, the utility model adopts the following technical scheme:

an intelligent single-well metering device convenient to install comprises an intelligent single-well metering device body and a dial plate arranged on the intelligent single-well metering device body, wherein connecting pipes are arranged on two sides of the intelligent single-well metering device body, mounting pipes are fixedly connected to two sides of the intelligent single-well metering device body, first annular grooves are formed in the side wall of each mounting pipe, one sides, far away from each other, of the two first annular grooves are respectively provided with an opening, a sealing ring is movably sleeved in each first annular groove, two elastic guide mechanisms are fixedly connected to one sides, close to each other, of the two sealing rings, a sliding sleeve of each mounting pipe is sleeved on the corresponding two elastic guide mechanisms, one ends, close to each other, of the two connecting pipes respectively extend into the corresponding first annular grooves and are in close contact with one sides, far away from each other, of the two sealing rings, clamping grooves are formed in the top and the bottom of the connecting pipes, the clamping mechanism is movably clamped in the clamping groove, a second annular groove is formed in the outer side of the mounting pipe, one side, far away from each other, of each of the two second annular grooves is provided with an opening, a moving ring is slidably mounted on the side wall of each second annular groove, a plurality of first springs are fixedly connected between the inner wall of the top of each moving ring and the inner wall of the corresponding second annular groove, the top of one side, far away from each moving ring, of each moving ring is fixedly connected with one side, close to each other, of each clamping mechanism, the top of each moving ring is fixedly connected with a mounting rod, a first guide mechanism is fixedly connected with the top of each mounting rod, the clamping mechanism located below is slidably sleeved on the corresponding first guide mechanism, a first through hole is formed in the top of each mounting rod, one side, close to each first through hole, of each first through hole is provided with an opening, and a first fixed pulley and a second fixed pulley are rotatably mounted between the inner wall of the front side and the inner wall of each first through hole, the bottom of the clamping mechanism positioned below is fixedly connected with a flexible steel rope, and the bottom end of the flexible steel rope bypasses the bottom of the corresponding first fixed pulley and the bottom of the corresponding second fixed pulley and is fixedly connected with the bottom of the movable ring.

Preferably, elasticity guiding mechanism includes first guide bar, the one end of controlling two relative first guide bars and keeping away from each other respectively with two sealing washer one side fixed connection that are close to each other, the installation pipe slip cap is established on two first guide bars that correspond, two equal fixedly connected with compression spring that are in compression state in one side that two sealing washers are close to each other, compression spring keeps away from one end and the first ring channel of the sealing washer that corresponds and is close to one side inner wall fixed connection of intelligent single-well metering device body, compression spring movable sleeve is established on the first guide bar that corresponds.

Preferably, the clamping mechanism comprises a clamping block movably clamped in the clamping groove, moving blocks are fixedly connected to one sides, away from each other, of the two clamping blocks opposite to each other from top to bottom, one sides, close to each other, of the two moving blocks located above are fixedly connected to one sides, away from each other, of the two moving rings respectively, and the top end of the flexible steel rope is fixedly connected to the bottom of the corresponding moving block below.

Preferably, the first guide mechanism comprises a second guide rod fixedly connected to the top of the mounting rod, the moving block located below is slidably sleeved on the corresponding second guide rod, a second spring is fixedly connected between the bottom of the moving block located below and the top of the corresponding mounting rod, and the second spring is movably sleeved on the corresponding second guide rod.

Preferably, the top fixedly connected with connecting block of shift ring, the top fixedly connected with pull ring of connecting block, the top of pull ring extends to the top of the installation pipe that corresponds.

Preferably, equal fixedly connected with T shape slide rail on the one side inner wall that two second annular grooves are close to each other, T shape spout has all been seted up to one side that two shift rings are close to each other, T shape slide rail and the T shape spout sliding connection who corresponds.

Preferably, two rectangular channels have all been seted up on the one side inner wall that two first ring channels are close to each other, the inner wall of rectangular channel and the outside sliding connection of the first guide bar that corresponds, equal fixedly connected with slider on the one side inner wall that two relative rectangular channels kept away from each other from top to bottom, the spout has all been seted up to one side that two relative first guide bars kept away from each other from top to bottom, slider and corresponding spout sliding connection.

Preferably, the tops of the two moving blocks located above are fixedly connected with rectangular blocks, and one sides of the two rectangular blocks, which are close to each other, are fixedly connected with one sides of the two moving rings, which are far away from each other, respectively.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses be convenient for through the mode of simple push-and-pull, realize the sealing connection between intelligent single-well metering device body and the connecting pipe fast, improve the installation effectiveness, make things convenient for personnel to use, and compression spring's setting for the sealing washer can all the time with connecting pipe in close contact with, improve and connect the leakproofness, satisfy the user demand.

Drawings

Fig. 1 is a schematic structural view of an intelligent single-well metering device convenient to install according to the present invention;

FIG. 2 is an enlarged cross-sectional view of portion A of FIG. 1;

fig. 3 is an enlarged schematic structural view of a portion B in fig. 2.

In the figure: 100. an intelligent single-well metering device body; 101. a dial plate; 102. a connecting pipe; 1. installing a pipe; 2. a first annular groove; 3. a seal ring; 4. a first guide bar; 5. a compression spring; 6. a second annular groove; 7. a moving ring; 8. a moving block; 9. a card slot; 10. a clamping block; 11. a first spring; 12. mounting a rod; 13. a second guide bar; 14. a second spring; 15. a flexible steel cord; 16. a first perforation; 17. a first fixed pulley.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an intelligent single-well metering device convenient to install, including intelligent single-well metering device body 100 and dial plate 101 arranged on intelligent single-well metering device body 100, connecting pipes 102 are arranged on both sides of intelligent single-well metering device body 100, mounting pipe 1 is fixedly connected with both sides of intelligent single-well metering device body 100, first ring groove 2 is arranged on the side wall of mounting pipe 1, one side of two first ring grooves 2 far away from each other is set as an opening, a sealing ring 3 is movably sleeved in first ring groove 2, wherein the outer side of sealing ring 3 is in movable contact with the inner wall of corresponding first ring groove 2, two elastic guide mechanisms are fixedly connected with one side of two sealing rings 3 close to each other, mounting pipe 1 is slidably sleeved on corresponding two elastic guide mechanisms, one ends of two connecting pipes 102 close to each other extend into corresponding first ring grooves 2 respectively and are tightly connected with one side of two sealing rings 3 far away from each other The sealing ring is tightly contacted, wherein the sealing ring 3 is arranged, the effect of installation and sealing is realized, the outer side of the connecting pipe 102 is movably contacted with the inner wall of the corresponding first annular groove 2, the top and the bottom of the connecting pipe 102 are both provided with clamping grooves 9, a clamping mechanism is movably clamped in the clamping grooves 9, the outer side of the installation pipe 1 is provided with second annular grooves 6, the sides, away from each other, of the two second annular grooves 6 are both provided with openings, the side wall of each second annular groove 6 is provided with a moving ring 7 in a sliding manner, the outer side of the moving ring 7 is movably contacted with the inner wall of the corresponding second annular groove 6, the top of the moving ring 7 is fixedly connected with a connecting block, the top of the connecting block is fixedly connected with a pull ring, the top of the pull ring extends to the upper part of the corresponding installation pipe 1, the driving purpose is realized through the pull ring, the inner wall of one side, close to each other, each second annular groove 6 is fixedly connected with a T-shaped slide rail, the side, close to each other, of each of the two moving rings 7 is provided with a T-shaped sliding groove, the T-shaped sliding grooves are in sliding connection with the corresponding T-shaped sliding grooves, the T-shaped sliding rails are arranged to play a role in guiding, a plurality of first springs 11 are fixedly connected between the inner wall of the top of each of the moving rings 7 and the inner wall of the corresponding second annular groove 6, the top of the side, far away from each other, of each of the two moving rings 7 is fixedly connected with the side, close to each other, of each of the two clamping mechanisms, the upper side of each of the two second annular grooves 6 is fixedly connected with an installation rod 12, the top of the installation rod 12 is fixedly connected with a first guide mechanism, the lower clamping mechanism is slidably sleeved on the corresponding first guide mechanism, the top of the installation rod 12 is provided with a first through hole 16, the side, close to each of the two first through holes 16 is provided with an opening, and a first fixed pulley 17 is rotatably installed between the inner wall of the front side and the inner wall of the first through hole 16, wherein, the inner walls of the front side and the rear side of the first perforation 16 are fixedly connected with first bearings, the inner rings of two first bearings positioned in the same first perforation 16 are fixedly sleeved with the same first pin shaft, the front side of the first fixed pulley 17 is provided with a first circular hole, the inner wall of the first circular hole is fixedly connected with the outer side of the corresponding first pin shaft, the first bearings are matched with the corresponding first pin shaft to play the effect of rotating installation, a second fixed pulley is rotatably installed between the inner walls of the front side and the rear side of the first perforation 16, wherein, the inner walls of the front side and the rear side of the first perforation 16 are fixedly connected with second bearings, the inner rings of two second bearings positioned in the same second annular groove 6 are fixedly sleeved with the same second pin shaft, the front side of the second fixed pulley is provided with a second circular hole, the inner wall of the second circular hole is fixedly connected with the outer side of the corresponding second pin shaft, the second pin shaft is matched with a corresponding second bearing to achieve the effect of rotating installation, the bottom of the clamping mechanism positioned below is fixedly connected with a flexible steel rope 15, and the bottom end of the flexible steel rope 15 bypasses the bottom of a corresponding first fixed pulley 17 and the bottom of a corresponding second fixed pulley and is fixedly connected with the bottom of the movable ring 7;

elastic guide mechanism includes first guide bar 4, the one end of controlling two relative first guide bar 4 and keeping away from each other is respectively with one side fixed connection that two sealing washer 3 are close to each other, install 1 slip cap of pipe and establish on two corresponding first guide bar 4, wherein two rectangular channels have all been seted up on the one side inner wall that two first ring channel 2 are close to each other, the inner wall of rectangular channel and the outside sliding connection of the first guide bar 4 that corresponds, equal fixedly connected with slider on the one side inner wall that two rectangular channels that are relative from top to bottom keep away from each other, the spout has all been seted up to one side that two first guide bar 4 that are relative from top to bottom keep away from each other, slider and corresponding spout sliding connection, the slider cooperatees with the spout that corresponds and plays spacing anticreep effect, two equal fixedly connected with compression spring 5 that are in compression state in one side that two sealing washer 3 are close to each other, compression spring 5 keeps away from the one end of corresponding sealing washer 3 and first ring channel 2 and is close to intelligent single well measurement The inner wall of one side of the device body 100 is fixedly connected, and the compression spring 5 is movably sleeved on the corresponding first guide rod 4, wherein the arrangement of the compression spring 5 plays a role in providing a tightening force for the sealing ring 3, so that the sealing effect is further improved;

the clamping mechanism comprises clamping blocks 10 which are movably clamped in the clamping grooves 9, moving blocks 8 are fixedly connected to the sides, far away from each other, of the two clamping blocks 10 which are opposite up and down, the sides, close to each other, of the two moving blocks 8 which are positioned above are fixedly connected with the sides, far away from each other, of the two moving rings 7 respectively, rectangular blocks are fixedly connected to the tops of the two moving blocks 8 which are positioned above, the sides, close to each other, of the two rectangular blocks are fixedly connected with the sides, far away from each other, of the two moving rings 7 respectively, and the top ends of the flexible steel ropes 15 are fixedly connected with the bottoms of the corresponding moving blocks 8 below;

the first guiding mechanism comprises a second guiding rod 13 fixedly connected with the top of the mounting rod 12, the moving block 8 positioned below is slidably sleeved on the corresponding second guiding rod 13, wherein the bottom of the moving block 8 positioned below is provided with a guiding groove, the inner wall of the guiding groove is slidably connected with the outer side of the corresponding second guiding rod 13, the second guiding rod 13 plays a role of guiding the corresponding moving block 8, a second spring 14 is fixedly connected between the bottom of the moving block 8 positioned below and the top of the corresponding mounting rod 12, the second spring 14 is movably sleeved on the corresponding second guiding rod 13, wherein the second spring 14 is arranged to play a role of driving the moving block 8 to move, the utility model is convenient for rapidly realizing the sealing connection between the intelligent single-well metering device body 100 and the connecting pipe 102 by a simple push-pull mode, the mounting efficiency is improved, and the use is convenient for personnel, and the arrangement of the compression spring 5 enables the sealing ring 3 to be always in close contact with the connecting pipe 102, so that the connection sealing performance is improved, and the use requirement is met.

The working principle is as follows: when the intelligent single-well metering device is used, the connecting pipe 102 and the intelligent single-well metering device body 100 are in a connected state, when the connecting pipe 102 and the intelligent single-well metering device body 100 need to be detached, the pull ring is pulled upwards to drive the moving ring 7 to move upwards through the corresponding connecting block, the moving ring 7 moves upwards and stretches the corresponding first spring 11, the moving ring 7 drives the corresponding flexible steel rope 15 to sequentially slide at the bottom of the first fixed pulley 17 and the bottom of the second fixed pulley, the flexible steel rope 15 pulls the corresponding lower moving block 8 to slide downwards on the second guide rod 13, the corresponding second spring 14 is compressed while the lower moving block 8 moves downwards, and meanwhile, the moving ring 7 drives the upper moving block 8 to move upwards through the corresponding rectangular block, so that the upper and lower opposite moving blocks 8 move towards directions away from each other, the moving block 8 drives the corresponding clamping block 10 to be separated from the clamping groove 9, the fixing of the connecting pipe 102 is released, the connecting pipe 102 can be moved in the direction far away from the intelligent single-well metering device body 100 at the moment, the connecting pipe 102 is gradually moved out of the corresponding first annular groove 2, and the connecting pipe 102 is gradually separated from the corresponding sealing ring 3 while moving, so that the compression spring 5 in a compression state is gradually rebounded and reset, and the connection pipe 102 and the intelligent single-well metering device body 100 are separated;

when the connecting pipe 102 and the intelligent single-well metering device body 100 need to be installed, the pull ring is pulled upwards again, so that the first spring 11 is in a stretching state, the second spring 14 is in a compressing state, the connecting pipe 102 is moved towards the direction close to the intelligent single-well metering device body 100, the connecting pipe 102 is moved into the corresponding first annular groove 2, when the connecting pipe 102 is moved to be in contact with the corresponding sealing ring 3, the connecting pipe 102 continues to move and continue to extrude the sealing ring 3, so that the sealing ring 3 moves towards the direction close to the intelligent single-well metering device body 100 and drives the corresponding first guide rod 4 to slide in the rectangular groove, the corresponding compression spring 5 is compressed while the sealing ring 3 moves, through observation, when the clamping groove 9 is aligned with the corresponding clamping block 10, the connecting pipe 102 stops being pushed, the pulling force on the pull ring is released, at this time, the elastic force of the first spring 11 in the stretching state drives the corresponding moving ring 7 to move downwards, the moving ring 7 releases the pulling force of the corresponding flexible steel rope 15 downwards, so that the second spring 14 in a compressed state is gradually reset, at the moment, the elastic force of the second spring 14 in the compressed state drives the corresponding lower moving block 8 to move upwards, meanwhile, the moving ring 7 drives the corresponding upper moving block 8 to move downwards, the two upper and lower opposite moving blocks 8 move towards the mutually approaching direction and respectively drive the corresponding fixture blocks 10 to move into the fixture grooves 9, the fixture blocks 10 are clamped with the corresponding fixture grooves 9, so that the connecting pipe 102 is fixed and the installation is completed, the sealing connection between the intelligent single-well metering device body 100 and the connecting pipe 102 is rapidly realized through a simple push-pull mode, the installation efficiency is improved, the use by personnel is facilitated, the compression spring 5 in the compressed state can always give an extrusion force to the corresponding sealing ring 3, and the sealing ring 3 can be always in close contact with the connecting pipe 102, the connection sealing performance is improved.

In the description of the present application, it should be further noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, a connection through an intermediate medium, and a connection between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to specific circumstances.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides an intelligent single well metering device convenient to installation, includes intelligent single well metering device body (100) and dial plate (101) of setting on intelligent single well metering device body (100), the both sides of intelligent single well metering device body (100) all are equipped with connecting pipe (102), a serial communication port, the equal fixedly connected with installation pipe (1) in both sides of intelligent single well metering device body (100), first ring channel (2) have been seted up on the lateral wall of installation pipe (1), one side that two first ring channels (2) kept away from each other all is established to the opening, the activity cover is equipped with sealing washer (3) in first ring channel (2), two equal fixedly connected with two elastic guide mechanisms in one side that sealing washer (3) are close to each other, installation pipe (1) slip cap is established on two corresponding elastic guide mechanisms, the one end that two connecting pipes (102) are close to each other extends respectively to in corresponding first ring channel (2) and with two sealing washers (2), (102) 3) The side that keeps away from each other is in close contact with, the top and the bottom of connecting pipe (102) have all been seted up draw-in groove (9), the activity card is equipped with and clamps the mechanism in draw-in groove (9), the outside of installation pipe (1) has been seted up second ring channel (6), the one side that two second ring channels (6) kept away from each other is all established as the opening, slidable mounting has shift ring (7) on the lateral wall of second ring channel (6), fixedly connected with a plurality of first springs (11) between the inside wall of the top inner wall of shift ring (7) and the corresponding second ring channel (6), the one side top that two shift rings (7) kept away from each other is respectively with the one side fixed connection that two clamp the mechanism that is located the top are close to each other, all fixedly connected with installation pole (12) on the one side inner wall that two second ring channels (6) are close to each other, the top fixedly connected with first guiding mechanism of installation pole (12), the mechanism that clamps that is located the below is slided the cover and is established on corresponding first guiding mechanism, first perforation (16) have been seted up at the top of installation pole (12), one side that two first perforation (16) are close to each other all establishes to the opening, rotate between the front side inner wall of first perforation (16) and the rear side inner wall and install first fixed pulley (17) and second fixed pulley, the bottom fixedly connected with flexible steel cable (15) of the mechanism that clamps that is located the below, the bottom of flexible steel cable (15) is walked around the bottom of corresponding first fixed pulley (17) and the bottom of second fixed pulley and with the bottom fixed connection of shift ring (7).

2. The intelligent single-well metering device convenient to install according to claim 1, wherein the elastic guide mechanism comprises first guide rods (4), one ends, far away from each other, of the two first guide rods (4) opposite to each other on the left and right sides are fixedly connected with one sides, close to each other, of the two sealing rings (3), the installation pipe (1) is sleeved on the two corresponding first guide rods (4) in a sliding mode, two compression springs (5) in a compression state are fixedly connected with one sides, close to the intelligent single-well metering device body (100), of the compression springs (5), one ends, far away from the corresponding sealing rings (3) are fixedly connected with the inner wall of one side, close to the intelligent single-well metering device body (100), of the first annular grooves (2), and the compression springs (5) are movably sleeved on the corresponding first guide rods (4).

3. The intelligent single-well metering device convenient to mount according to claim 1, wherein the clamping mechanism comprises a clamping block (10) movably clamped in a clamping groove (9), moving blocks (8) are fixedly connected to the sides, away from each other, of two clamping blocks (10) which are opposite up and down, one sides, close to each other, of the two moving blocks (8) which are located above are fixedly connected to the sides, away from each other, of the two moving rings (7), respectively, and the top end of the flexible steel rope (15) is fixedly connected to the bottom of the corresponding moving block (8) which is located below.

4. The intelligent single-well metering device convenient to install according to claim 1, wherein the first guide mechanism comprises a second guide rod (13) fixedly connected to the top of the installation rod (12), the lower moving block (8) is slidably sleeved on the corresponding second guide rod (13), a second spring (14) is fixedly connected between the bottom of the lower moving block (8) and the top of the corresponding installation rod (12), and the second spring (14) is movably sleeved on the corresponding second guide rod (13).

5. An intelligent single-well metering device convenient to install according to claim 1, wherein a connecting block is fixedly connected to the top of the moving ring (7), a pull ring is fixedly connected to the top of the connecting block, and the top of the pull ring extends to the upper side of the corresponding installation pipe (1).

6. The intelligent single-well metering device convenient to install according to claim 1, wherein the inner walls of the two second annular grooves (6) on the sides close to each other are fixedly connected with T-shaped sliding rails, the sides close to each other of the two moving rings (7) are respectively provided with a T-shaped sliding groove, and the T-shaped sliding rails are in sliding connection with the corresponding T-shaped sliding grooves.

7. The intelligent single-well metering device convenient to install according to claim 2, wherein two rectangular grooves are formed in the inner wall, close to each other, of each of the two first annular grooves (2), the inner walls of the rectangular grooves are in sliding connection with the outer sides of the corresponding first guide rods (4), sliding blocks are fixedly connected to the inner walls, far away from each other, of the two rectangular grooves, opposite to each other, sliding grooves are formed in the sides, far away from each other, of the two first guide rods (4), opposite to each other, and the sliding blocks are in sliding connection with the corresponding sliding grooves.

8. An intelligent single-well metering device convenient to install according to claim 3, wherein a rectangular block is fixedly connected to the top of each of the two moving blocks (8) located above, and one side, close to each other, of each rectangular block is fixedly connected to one side, far away from each other, of each moving ring (7).