Anchor chain tension tester

Abstract

The invention discloses an anchor chain tension tester, which belongs to the technical field of tension testers and comprises a bottom plate, a slide rail is fixedly mounted on the upper end face of the bottom plate, a first fixing plate is arranged on the front side of the slide rail and fixedly connected with the bottom plate, a second fixing plate is arranged on the upper side of the first fixing plate, and an anchor chain body is arranged between the first fixing plate and the second fixing plate. According to the scheme, by arranging the first fixing mechanism, the second fixing mechanism and the third fixing mechanism, multi-layer fixing of the anchor chain body is achieved. The first fixing mechanism is used for preliminarily fixing the anchor chain main body to ensure that the anchor chain main body is basically stable; then, the second fixing mechanism carries out secondary reinforcement, the fixing effect is further enhanced, and shaking and deflection are reduced; and finally, the fixing mechanism III is matched with the fixing mechanism I and the fixing mechanism II, so that the stability between the fixing mechanism I and the fixing mechanism II is improved, the anchor chain is kept absolutely stable in the whole detection process, and the accuracy and reliability of a detection result are improved.

Description

Technical Field

[0001] The invention relates to the technical field of tension testing machines, and more particularly to an anchor chain tension testing machine. Background Art

[0002] Marine chain is an important component for ships to be moored in rivers and seas, and is related to the safety of ship anchoring. It is different from general anchor chains and is a chain used to fix marine structures such as oil drilling platforms. Due to its harsh working environment, there are many requirements for this chain, such as strength, stiffness and defect detection, etc. The anchor chain tensile testing machine is a new type of equipment for testing the performance and tensile strength of anchor chains.

[0003] A Chinese patent with the authorization publication number CN113340722B discloses an anchor chain tension testing machine that is convenient for testing. By providing a clamping mechanism, the anchor chain that is sleeved onto the outside of the upper claw seat can be clamped and fixed to prevent the anchor chain from falling off and tilting during the testing process, thereby affecting the test results.

[0004] Although this anchor chain tension testing machine, which is convenient for testing, clamps and fixes the anchor chain, the fixing effect of the anchor chain is poor during actual use, especially when performing tension testing on special anchor chains. This problem is particularly prominent. The shaking and skewness of the anchor chain will not only affect the accuracy of the test results, but may also cause equipment damage and safety hazards. For example, when the anchor chain shakes during the test, it may cause uneven distribution of tension, causing some parts to bear excessive stress while other parts are understressed, thereby affecting the overall test results. In addition, the skewness of the anchor chain will increase the wear of the testing equipment and reduce its service life. In order to ensure the accuracy and safety of the test results, effective measures need to be taken to fix the anchor chain, such as using professional fixing devices and clamps to ensure that the anchor chain remains stable during the test. Summary of the invention

[0005] In view of the problems existing in the prior art, an object of the present invention is to provide an anchor chain tension testing machine, which can provide a better anchor chain fixing effect.

[0006] To solve the above problems, the present invention adopts the following technical solutions.

[0007] The cam is provided with a plurality of movable parts, and the movable part is provided with a plurality of movable parts, and the movable part is provided with a plurality of movable parts.

[0008] The fixing mechanism 1 includes a motor fixedly mounted on the rear end surfaces of the fixing plate 1 and the fixing plate 2, two groups of support members are arranged on the lower side of the motor, a threaded rod is rotatably connected between the two groups of support members, and the threaded rod is fixedly connected to the output shaft of the motor.

[0009] The thread groove on the outer surface of the threaded rod is a bidirectional thread groove, the upper side and the lower side of the outer surface of the threaded rod are both spirally connected with a threaded sleeve, and the left end and the right end of the outer surface of the threaded sleeve are both rotatably connected with a connecting rod.

[0010] Both sides of the front end surfaces of the fixing plate 1 and the fixing plate 2 are provided with a slide groove 2, the interior of the slide groove 2 is slidably connected with a transmission rod, and the two groups of connecting rods on the same side are rotatably connected with the corresponding transmission rods.

[0011] Two groups of clamping blocks are symmetrically arranged on the front side of the second fixing plate, and limiting grooves are arranged on the inner sides of the clamping blocks corresponding to the anchor chain body, and the two groups of transmission rods are fixedly connected to the corresponding clamping blocks.

[0012] The second fixing mechanism includes two groups of connecting pipes fixedly installed between the transmission rods, the connecting pipe is arranged on the front side of the second fixing plate, a hook is fixedly installed on the front end surface of the second fixing plate, an inner cavity is opened inside the hook, and the inner cavity is communicated with the connecting pipe.

[0013] A sealing plate 1 and an extension hook are slidably connected inside the inner cavity opened by the hook, one end of the extension hook is fixedly connected to the sealing plate 1, and the other end of the extension hook extends to the outside of the inner cavity, and a slot is opened on the front end surface of the fixing plate 2 corresponding to the extension hook.

[0014] The fixing mechanism three includes a fixing column fixedly installed on the rear end face of the connecting rod, the end of the fixing column is rotatably connected with an extrusion block, a transmission shell is arranged between two adjacent groups of extrusion blocks, the extrusion block extends to the interior of the transmission shell and is slidably connected to the transmission shell.

[0015] An annular cavity is provided inside the clamping block, and sealing plate 2 and sealing plate 3 are slidably connected inside the annular cavity. Closing rod 1 is fixedly installed on the end surface of sealing plate 2, and closing rod 2 is fixedly installed on the end surface of sealing plate 3. A socket is provided at the end of closing rod 2, and an insertion rod is fixedly installed at the end of closing rod 1.

[0016] A bellows is provided between two adjacent groups of transmission shells, a delivery pipe is provided between the bellows and the annular cavity, and the front end surfaces of the fixing plate 1 and the fixing plate 2 are provided with fixing mechanism 1, fixing mechanism 2 and fixing mechanism 3.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) This scheme realizes multi-level fixation of the anchor chain body by setting fixing mechanism 1, fixing mechanism 2 and fixing mechanism 3. Fixing mechanism 1 performs preliminary fixation on the anchor chain body to ensure its basic stability; then, fixing mechanism 2 performs secondary reinforcement to further enhance the fixing effect and reduce shaking and skew; finally, fixing mechanism 3 cooperates with fixing mechanism 1 and fixing mechanism 2 to improve the stability between the two, ensuring that the anchor chain remains absolutely stable during the entire detection process, thereby improving the accuracy and reliability of the detection results;

[0019] (2) This scheme sets up a detection mechanism, uses a telescopic rod to pull the anchor chain body in a fixed state, and cooperates with the detection equipment inside the equipment to test the tension of the anchor chain body. Specifically, the telescopic rod accurately controls the magnitude and direction of the tension to ensure that the anchor chain remains stable during the detection process, avoiding the influence of shaking and skewing on the detection results. At the same time, the internal detection equipment can monitor and record the tension data in real time to ensure the accuracy and reliability of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 The overall structure of the present invention is shown in the rear view

[0022] Figure 3 It is a partial structural cross-sectional view of the present invention;

[0023] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0024] Figure 5 is a cross-sectional view of a fixing mechanism of the present invention;

[0025] Figure 6 For the present invention Figure 5 The enlarged schematic diagram of point B in the middle;

[0026] Figure 7 For the present invention Figure 5 The enlarged schematic diagram at C in the middle;

[0027] Figure 8 It is a three-section view of the fixing mechanism of the present invention;

[0028] Fig. 9 For the present invention Figure 8 Enlarged schematic diagram at point D in the middle.

[0029] Description of the numbers in the figure:

[0030] 1. Bottom plate; 2. Slide rail; 3. Fixed plate 1; 4. Fixed plate 2; 5. Telescopic rod; 6. Slide plate; 7. Slide groove 1; 8. Slider; 9. Anchor chain body; 10. Motor; 11. Support; 12. Threaded rod; 13. Threaded sleeve; 14. Connecting rod; 15. Transmission rod; 16. Slide groove 2; 17. Clamping block; 18. Connecting tube; 19. Hook; 20. Sealing plate 1; 21. Extension hook; 22. Slot; 23. Limiting groove; 24. Fixed column; 25. Extrusion block; 26. Transmission housing; 27. Bellows; 28. Delivery pipe; 29. ​​Annular cavity; 30. Sealing plate 2; 31. Closing rod 1; 32. Sealing plate 3; 33. Closing rod 2; 34. Inserting rod; 35. Socket. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making creative work are within the scope of protection of the present invention.

[0032] See also Figures 1 to 9 A chain tension testing machine comprises a bottom plate 1, a slide rail 2 is fixedly installed on the upper end surface of the bottom plate 1, a fixing plate 3 is arranged on the front side of the slide rail 2, the fixing plate 3 is fixedly connected to the bottom plate 1, a fixing plate 2 4 is arranged on the upper side of the fixing plate 3, an anchor chain body 9 is arranged between the fixing plate 1 3 and the fixing plate 2 4, a detection mechanism is arranged between the fixing plate 1 3 and the fixing plate 2 4, a fixing mechanism 1 is arranged at both ends of the detection mechanism, a fixing mechanism 2 and a fixing mechanism 3 are arranged inside the fixing mechanism 1, the detection mechanism comprises a telescopic rod 5 fixedly installed on the upper side of the rear end surface of the slide rail 2, a slide plate 6 is slidably connected inside the slide rail 2, the slide plate 6 is fixedly connected to the fixing plate 2 4, a slide groove 7 is opened on the rear end surface of the slide rail 2, a slider 8 is slidably connected inside the slide groove 7, the lower end of the telescopic rod 5 is fixedly connected to the slider 8, and the slider 8 is fixedly connected to the slider 6.

[0033] During the actual use of the existing equipment, the fixing effect of the anchor chain main body 9 is poor, especially when the special anchor chain is subjected to tension testing. This problem is particularly prominent. The shaking and skewness of the anchor chain will not only affect the accuracy of the test results, but may also cause equipment damage and safety hazards. For example, when the anchor chain shakes during the test, it may cause uneven distribution of tension, causing some parts to bear excessive stress while other parts are understressed, thereby affecting the overall test results. In addition, the skewness of the anchor chain will increase the wear of the testing equipment and reduce its service life. In order to ensure the accuracy and safety of the test results, effective measures need to be taken to fix the anchor chain, such as using professional fixing devices and clamps to ensure that the anchor chain remains stable during the test. Therefore, this scheme realizes multi-level fixation of the anchor chain main body 9 by setting fixing mechanism one, fixing mechanism two and fixing mechanism three. Fixing mechanism one performs preliminary fixation on the anchor chain body 9 to ensure its basic stability; then, fixing mechanism two performs secondary reinforcement to further enhance the fixing effect and reduce shaking and skew; finally, fixing mechanism three cooperates with fixing mechanism one and fixing mechanism two to enhance the stability between the two, ensuring that the anchor chain body 9 remains absolutely stable during the entire detection process, thereby improving the accuracy and reliability of the detection results.

[0034] The fixing mechanism 1, the fixing mechanism 2 and the fixing mechanism 3 on the fixing plate 1 3 also clamp and fix one end of the anchor chain body 9, and then the telescopic rod 5 is started to make the other end of the anchor chain body 9 in the fixed state carried by the fixing plate 2 4 move upward, thereby pulling the anchor chain body 9 and performing tension detection on the anchor chain body 9.

[0035] This solution sets up a detection mechanism, uses the telescopic rod 5 to pull the anchor chain body 9 in a fixed state, and cooperates with the detection equipment inside the device to test the tension of the anchor chain body 9. Specifically, the telescopic rod 5 accurately controls the magnitude and direction of the tension to ensure that the anchor chain body 9 remains stable during the detection process to avoid the influence of shaking and skewing on the detection results. At the same time, the internal detection equipment can monitor and record the tension data in real time to ensure the accuracy and reliability of the detection results.

[0036] The fixing mechanism 1 includes a motor 10 fixedly mounted on the rear end faces of a fixing plate 1 3 and a fixing plate 2 4, two groups of support members 11 are arranged on the lower side of the motor 10, a threaded rod 12 is rotatably connected between the two groups of support members 11, and the threaded rod 12 is fixedly connected to the output shaft of the motor 10.

[0037] The thread groove on the outer surface of the threaded rod 12 is a bidirectional thread groove. The upper and lower sides of the outer surface of the threaded rod 12 are both spirally connected with a threaded sleeve 13, and the left and right ends of the outer surface of the threaded sleeve 13 are rotatably connected with a connecting rod 14.

[0038] The front end surfaces of the fixing plate 1 3 and the fixing plate 2 4 are both provided with a second slide groove 16 , the interior of the second slide groove 16 is slidably connected with a transmission rod 15 , and the two sets of connecting rods 14 on the same side are rotatably connected with the corresponding transmission rod 15 .

[0039] Two groups of clamping blocks 17 are symmetrically arranged on the front side of the second fixing plate 4 . The inner sides of the clamping blocks 17 are provided with limiting grooves 23 corresponding to the anchor chain body 9 . Both groups of transmission rods 15 are fixedly connected to the corresponding clamping blocks 17 .

[0040] First, one end of the anchor chain body 9 is hung on the hook 19 on the fixing plate 4, and the other end is hung on the hook 19 on the fixing plate 3, and then the motor 10 is started to rotate the threaded rod 12. The thread groove on the outer surface of the threaded rod 12 is a bidirectional thread groove, so the two groups of threaded sleeves 13 connected by spiral transmission on the outer surface of the threaded rod 12 will move relative to each other, and each group of threaded sleeves 13 will carry two groups of connecting rods 14 for displacement, and the two groups of connecting rods 14 on the same side are rotatably connected with the corresponding transmission rods 15, so the transmission rod 15 will carry the clamping block 17 to move toward the anchor chain body 9 inside the slide groove 16, and the limiting grooves 23 on the two groups of clamping blocks 17 cooperate with each other to clamp and fix the anchor chain body 9 inside the limiting grooves 23.

[0041] The second fixing mechanism includes a connecting pipe 18 fixedly installed between two groups of transmission rods 15. The connecting pipe 18 is arranged on the front side of the second fixing plate 4. A hook 19 is fixedly installed on the front end surface of the second fixing plate 4. An inner cavity is opened inside the hook 19, and the inner cavity is connected to the connecting pipe 18.

[0042] A sealing plate 20 and an extension hook 21 are slidably connected inside the inner cavity opened by the hook 19. One end of the extension hook 21 is fixedly connected to the sealing plate 20, and the other end of the extension hook 21 extends to the outside of the inner cavity. A slot 22 is opened on the front end surface of the fixing plate 24 corresponding to the extension hook 21.

[0043] Secondly, when the two sets of transmission rods 15 are displaced toward each other, the gas inside the connecting tube 18 will be squeezed, so that the gas inside the connecting tube 18 enters the inner cavity opened by the hook 19, so that the sealing plate 20 slidably connected in the inner cavity is displaced toward the end, and the sealing plate 20 will push out the extension hook 21 and finally insert it into the slot 22, thereby performing secondary fixing and limiting on the anchor chain body 9.

[0044] The third fixing mechanism includes a fixing column 24 fixedly installed on the rear end face of the connecting rod 14, the end of the fixing column 24 is rotatably connected with an extrusion block 25, a transmission shell 26 is arranged between two adjacent groups of extrusion blocks 25, and the extrusion block 25 extends to the interior of the transmission shell 26 and is slidably connected to the transmission shell 26.

[0045] An annular cavity 29 is provided inside the clamping block 17, and a sealing plate 2 30 and a sealing plate 3 32 are slidably connected inside the annular cavity 29. A closing rod 1 31 is fixedly installed on the end surface of the sealing plate 2 30, and a closing rod 2 33 is fixedly installed on the end surface of the sealing plate 3 32. A socket 35 is provided at the end of the closing rod 2 33, and an insert rod 34 is fixedly installed at the end of the closing rod 1 31.

[0046] A bellows 27 is provided between two adjacent groups of transmission shells 26, a delivery pipe 28 is provided between the bellows 27 and the annular cavity 29, and the front end surfaces of the fixing plate 1 3 and the fixing plate 2 4 are provided with a fixing mechanism 1, a fixing mechanism 2 and a fixing mechanism 3.

[0047] Secondly, each set of connecting rods 14 is fixedly installed with a fixing column 24. When the connecting rod 14 is displaced, the extrusion block 25 on the upper or lower fixing column 24 will slide inside the transmission housing 26, and then the gas inside the transmission housing 26 will be discharged into the inside of the annular cavity 29 through the bellows 27 and the conveying pipe 28, and then the symmetrically arranged sealing plate 2 30 and sealing plate 3 32 will be displaced toward the end of the annular cavity 29, and the closing rod 1 31 and the closing rod 2 33 will extend out of the annular cavity 29 and make the two close together, and at the same time, the insertion rod 34 on the closing rod 1 31 will be inserted into the slot 22 on the closing rod 2 33, further increasing the stability of the anchor chain body 9 when clamping and fixing it.

[0048] Method of use: First, hang one end of the anchor chain body 9 on the hook 19 on the fixing plate 2 4, and the other end on the hook 19 on the fixing plate 1 3, then start the motor 10 to rotate the threaded rod 12, the thread groove on the outer surface of the threaded rod 12 is a bidirectional thread groove, so the two groups of threaded sleeves 13 connected by the spiral transmission on the outer surface of the threaded rod 12 will move relative to each other, each group of threaded sleeves 13 will carry two groups of connecting rods 14 to move, and the two groups of connecting rods 14 on the same side are rotatably connected with the corresponding transmission rods 15, so the transmission rod 15 will carry the clamping block 17 to move toward the anchor chain body 9 inside the sliding groove 2 16, and the limiting grooves 23 on the two groups of clamping blocks 17 cooperate with each other to clamp and fix the anchor chain body 9 inside the limiting grooves 23;

[0049] Secondly, when the two sets of transmission rods 15 move toward each other, the gas inside the connecting tube 18 will be squeezed, so that the gas inside the connecting tube 18 enters the inner cavity opened by the hook 19, so that the sealing plate 1 20 slidably connected in the inner cavity moves toward the end, and the sealing plate 1 20 will push out the extension hook 21 and finally insert it into the slot 22, thereby performing a secondary fixing and limiting on the anchor chain body 9;

[0050] Secondly, each set of connecting rods 14 is fixedly installed with a fixing column 24. When the connecting rod 14 is displaced, the extrusion block 25 on the upper or lower fixing column 24 will make the extrusion block 25 slide inside the transmission housing 26, and then discharge the gas inside the transmission housing 26 into the inside of the annular cavity 29 through the bellows 27 and the delivery pipe 28, and then the symmetrically arranged sealing plate 2 30 and sealing plate 3 32 are displaced to the end of the annular cavity 29, and the closing rod 1 31 and the closing rod 2 33 are extended out of the annular cavity 29, and the two are closely attached together, and at the same time, the insertion rod 34 on the closing rod 1 31 is inserted into the slot 22 on the closing rod 2 33, further increasing the stability of the anchor chain body 9 when being clamped and fixed;

[0051] The fixing mechanism 1, the fixing mechanism 2 and the fixing mechanism 3 on the fixing plate 1 3 also clamp and fix one end of the anchor chain body 9, and then the telescopic rod 5 is started to make the other end of the anchor chain body 9 in the fixed state carried by the fixing plate 2 4 move upward, thereby pulling the anchor chain body 9 and performing tension detection on the anchor chain body 9.

[0052] The above is only a preferred specific implementation of the present invention; however, the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and its improved conception within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An anchor chain tension testing machine, comprising a bottom plate (1), characterized in that: The upper end surface of the bottom plate (1) is fixedly mounted with a slide rail (2), the front side of the slide rail (2) is provided with a fixing plate 1 (3), the fixing plate 1 (3) is fixedly connected to the bottom plate (1), the upper side of the fixing plate 1 (3) is provided with a fixing plate 2 (4), an anchor chain body (9) is provided between the fixing plate 1 (3) and the fixing plate 2 (4), a detection mechanism is provided between the fixing plate 1 (3) and the fixing plate 2 (4), both ends of the detection mechanism are provided with a fixing mechanism 1, the inner portion of the fixing mechanism 1 is provided with a fixing mechanism 2, and the fixing mechanism 2 is provided with a fixing mechanism 2. The part is provided with a fixing mechanism 2 and a fixing mechanism 3, the detection mechanism comprises a telescopic rod (5) fixedly installed on the upper side of the rear end surface of the slide rail (2), the interior of the slide rail (2) is slidably connected with a slide plate (6), the slide plate (6) is fixedly connected with the fixing plate 2 (4), the rear end surface of the slide rail (2) is provided with a slide groove 1 (7), the interior of the slide groove 1 (7) is slidably connected with a slide block (8), the lower end of the telescopic rod (5) is fixedly connected with the slide block (8), and the slide block (8) is fixedly connected with the slide plate (6).

2. The anchor chain tension testing machine according to claim 1, characterized in that: The fixing mechanism 1 comprises a motor (10) fixedly mounted on the rear end surfaces of a fixing plate 1 (3) and a fixing plate 2 (4); two groups of support members (11) are arranged on the lower side of the motor (10); a threaded rod (12) is rotatably connected between the two groups of support members (11); and the threaded rod (12) is fixedly connected to the output shaft of the motor (10).

3. The anchor chain tension testing machine according to claim 2, characterized in that: The thread groove on the outer surface of the threaded rod (12) is a bidirectional thread groove, the upper side and the lower side of the outer surface of the threaded rod (12) are both spirally connected to a threaded sleeve (13), and the left end and the right end of the outer surface of the threaded sleeve (13) are both rotatably connected to a connecting rod (14).

4. The anchor chain tension testing machine according to claim 3, characterized in that: The front end surfaces of the fixing plate 1 (3) and the fixing plate 2 (4) are both provided with a second slide groove (16), the interior of the second slide groove (16) is slidably connected with a transmission rod (15), and the two groups of connecting rods (14) on the same side are both rotatably connected with the corresponding transmission rods (15).

5. The anchor chain tension testing machine according to claim 4, characterized in that: Two groups of clamping blocks (17) are symmetrically arranged on the front side of the second fixing plate (4), and limiting grooves (23) are provided on the inner sides of the clamping blocks (17) corresponding to the anchor chain body (9), and the two groups of transmission rods (15) are fixedly connected to the corresponding clamping blocks (17).

6. The anchor chain tension testing machine according to claim 5, characterized in that: The second fixing mechanism comprises two groups of connecting pipes (18) fixedly installed between the transmission rods (15), the connecting pipe (18) being arranged on the front side of the second fixing plate (4), a hook (19) being fixedly installed on the front end surface of the second fixing plate (4), an inner cavity being provided inside the hook (19), and the inner cavity being communicated with the connecting pipe (18).

7. The anchor chain tension testing machine according to claim 6, characterized in that: The inner cavity formed by the hook (19) is slidably connected with a sealing plate (20) and an extension hook (21); one end of the extension hook (21) is fixedly connected to the sealing plate (20); the other end of the extension hook (21) extends to the outside of the inner cavity; and a slot (22) is formed on the front end surface of the fixing plate (4) corresponding to the extension hook (21).

8. The anchor chain tension testing machine according to claim 7, characterized in that: The fixing mechanism three comprises a fixing column (24) fixedly mounted on the rear end surface of the connecting rod (14); an end of the fixing column (24) is rotatably connected with an extrusion block (25); a transmission housing (26) is arranged between two adjacent groups of extrusion blocks (25); the extrusion block (25) extends to the interior of the transmission housing (26) and is slidably connected to the transmission housing (26).

9. The anchor chain tension testing machine according to claim 8, characterized in that: An annular cavity (29) is provided inside the clamping block (17), and a sealing plate 2 (30) and a sealing plate 3 (32) are slidably connected inside the annular cavity (29), a closing rod 1 (31) is fixedly installed on the end surface of the sealing plate 2 (30), a closing rod 2 (33) is fixedly installed on the end surface of the sealing plate 3 (32), a plug hole (35) is provided at the end of the closing rod 2 (33), and an insertion rod (34) is fixedly installed at the end of the closing rod 1 (31).

10. The anchor chain tension testing machine according to claim 9, characterized in that: A bellows (27) is provided between two adjacent groups of transmission housings (26), a delivery pipe (28) is provided between the bellows (27) and the annular cavity (29), and front end surfaces of the fixing plate 1 (3) and the fixing plate 2 (4) are provided with a fixing mechanism 1, a fixing mechanism 2 and a fixing mechanism 3.

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