Hydraulic bolt tensioner tool for diaphragm compressor cylinder head

Abstract

The invention discloses a hydraulic bolt tensioner tool for a diaphragm compressor cylinder head, and relates to the technical field of tools, the hydraulic bolt tensioner tool comprises a hanging scaffold, a hydraulic bolt tensioner body, a fixing mechanism and a sliding block mechanism, the center of the top of the hanging scaffold is connected with an axial lifting hook through a support, and the side face of the hanging scaffold is connected with a plurality of radial lifting hooks through side plates; a plurality of sliding ways are evenly distributed along the circumference of the hanging scaffold, the hydraulic bolt stretcher bodies are arranged below the sliding ways at intervals, the fixing mechanisms are arranged on the hydraulic bolt stretcher bodies, and the sliding block mechanisms are arranged on the sliding ways. The sliding way is arranged on the hanging scaffold, the clamping groove is formed in the specific position, concentric with the cylinder head bolts of various sizes, of the sliding way, the hydraulic bolt tensioner can slide in the sliding way through the sliding block mechanism and is fixed in the clamping groove under the action of a spring of the sliding way mechanism, and the cylinder head bolts of various different center circle sizes can be fastened and detached; and the universality of the tool on cylinder heads with different sizes of the diaphragm compressor is greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of tooling, and in particular to a hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head. Background Art

[0002] The diaphragm compressor is a special type of positive displacement compressor. It mainly uses a motor to drive the crank-connecting rod mechanism to convert the rotational motion of the crankshaft into the reciprocating linear motion of the connecting rod, pushing the piston at the end of the connecting rod to also do reciprocating linear motion, thereby pushing the hydraulic oil in the cylinder head to compress the gas on the diaphragm side. The cylinder head is the core component of the diaphragm compression and is fastened with studs and nuts. The number of bolts and nuts fixing a single cylinder head varies from 28 to 32 groups. The main fixing methods used in production at this stage are as follows:

[0003] 1. Use torque wrenches to tighten and disassemble manually. This method not only requires workers to spend a lot of labor, but also can only tighten one nut at a time, which is inefficient. In addition, the torque wrench is actually pre-tightened by the torque method, and the error can reach ±25%.

[0004] 2. Use hydraulic wrenches for manual tightening and disassembly. The hydraulic wrench is actually pre-tightened by torque method, and the error can reach ±25%.

[0005] 3. Use hydraulic bolt tensioners for tightening and disassembling. If you operate about 30 groups of bolts and nuts on the cylinder head at one time, you need to buy about 30 hydraulic bolt tensioners. At present, the price of a single hydraulic bolt tensioner ranges from several thousand yuan. Imported products will be more expensive, which will greatly increase the cost of the enterprise; if you only buy a few hydraulic bolt tensioners for tightening in multiple times, you need to disassemble and transport the bolt tensioners many times, which will greatly affect the efficiency of workers. Although the problem is solved in the Chinese patent publication number CN101920449B, the device has the following disadvantages in the field of diaphragm compressors: First, the clamping mechanism, the slider guide mechanism and the connecting rod are used. The connecting rod cannot be extended, resulting in only the disassembly and assembly of bolts with a specific center circle size, and cannot be applied to occasions with different center circle sizes, and is not universal. Second, the structure has no vertical hoisting holes, and the connecting rod cannot be locked in the vertical direction, so that it can only operate on horizontally placed equipment, and many cylinder heads of diaphragm compressors are placed vertically, and a hydraulic bolt tensioner tooling is required to disassemble and assemble the vertically placed cylinder head bolts, which cannot be realized by the invention. 3. The slider guide mechanism is complex, and it requires dozens of parts to realize its functions, which makes the entire equipment structure complex and bulky, and difficult to disassemble and maintain. Summary of the invention

[0006] The object of the present invention is to provide a hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head to overcome the above-mentioned defects in the prior art.

[0007] A hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head, comprising a hanging plate, a hydraulic bolt tensioner body, a fixing mechanism and a slider mechanism, wherein an axial hook is connected to the center of the top of the hanging plate through a bracket, a plurality of radial hooks are connected to the side of the hanging plate through a side plate, a plurality of slideways are evenly distributed along the circumference of the hanging plate, and a plurality of hydraulic bolt tensioner bodies are provided and spaced below the slideways;

[0008] The fixing mechanism is arranged on the hydraulic bolt tensioner body;

[0009] The slider mechanism is arranged on the slideway and is used to limit the corresponding fixing mechanism and the hydraulic bolt tensioner body.

[0010] Preferably, the fixing mechanism includes a U-shaped card, a support beam and a fixing block. The U-shaped card is provided with two and is symmetrically arranged on the side of the hydraulic bolt tensioner body. Both ends of each U-shaped card are provided with folded edges, and the two folded edges on the same side are connected. The outer side of each U-shaped card is provided with a support beam, and the top of the support beam is provided with a semicircular fixing block.

[0011] Preferably, the slider mechanism includes a chassis, a stud, a sliding plate, a connecting bolt, a chuck and a spring. The chassis is connected to both fixed blocks and a stud is provided at the center of its top. The stud passes through the slide and is threadedly connected to the sliding plate above the hanging plate. Two connecting bolts are provided and are symmetrically arranged on both sides of the sliding plate. The connecting bolt passes through the sliding plate and the lower end thereof is threadedly connected to the chuck mounted on the stud. The spring is mounted on the stud and is located between the chuck and the chassis. A groove that matches the chuck one by one is provided at the bottom of the hanging plate.

[0012] Preferably, there is a clearance fit between the chuck and the slot.

[0013] Preferably, the chassis is connected to the fixing block via limiting bolts.

[0014] Preferably, the two folded edges on the same side are connected by fastening bolts.

[0015] Preferably, the number of the radial hooks is two.

[0016] The beneficial effects achieved by the present invention are:

[0017] 1. Compared with the torque method for pre-tightening cylinder head bolts, which will produce a pre-tightening force error of up to ±25%, and the repeated disassembly and assembly of the torque method will cause loss of threads, the hydraulic bolt puller has basically no pre-tightening force error and will not lose threads when pre-tightening; multiple hydraulic bolt tensioners are integrated on the lifting platform to facilitate lifting and transportation, and at the same time, multiple cylinder head bolts can be installed and disassembled at one time, greatly improving production efficiency.

[0018] 2. A slide is provided on the hanging plate, and a slot is provided at a specific position of the slide and the center circle of cylinder head bolts of various sizes. The hydraulic bolt tensioner can slide in the slide with the help of a slider mechanism and be fixed in the slot under the action of the slide mechanism spring, so as to realize the tightening and disassembly of cylinder head bolts of various center circle sizes, which greatly improves the versatility of the tooling for cylinder heads of different sizes of diaphragm compressors.

[0019] 3. After the diaphragm compressor cylinder head is machined, disassembled for equipment maintenance, or L-type vertical cylinder, P-type, etc., it is placed vertically and horizontally. At this time, the axial hook of the hoisting hoisting plate can be used to install and disassemble the vertical cylinder head. For the D-type diaphragm compressor and L-type diaphragm compressor horizontal cylinder, the cylinder head is arranged horizontally and vertically. At this time, the radial hook can be used to make the working port of the hydraulic bolt tensioner vertical to the ground, and the horizontal cylinder head can be directly installed and disassembled. This tool can simultaneously install and disassemble the bolts of the vertical cylinder head and the horizontal cylinder head, and has the same applicability to cylinder heads with different arrangements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure when the present invention is used on a vertical cylinder head.

[0021] Figure 2 It is a schematic diagram of the structure when the present invention is used on a horizontal cylinder head.

[0022] Figure 3 It is a schematic diagram of the force when the present invention is used on a horizontal cylinder head.

[0023] Figure 4 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0025] Figure 6 It is a structural schematic diagram of the hanging plate of the present invention.

[0026] Figure 7 It is a structural schematic diagram of the hydraulic bolt tensioner body and the fixing mechanism of the present invention.

[0027] Figure 8 It is a schematic structural diagram of the fixing mechanism part of the present invention.

[0028] Fig. 9 It is a structural schematic diagram of the slider mechanism of the present invention.

[0029] Fig.10 It is a cross-sectional view of the slider mechanism and the hanging plate of the present invention.

[0030] In the figure, 1. lifting plate; 11. slideway; 12. side plate; 13. radial hook; 2. bracket; 3. axial hook; 4. hydraulic bolt tensioner body; 5. fixing mechanism; 51. U-shaped clip; 52. folding edge; 53. support beam; 54. fixing block; 55. fastening bolt; 6. slider mechanism; 61. chassis; 62. limit bolt; 63. stud; 64. sliding plate; 65. connecting bolt; 66. chuck; 67. spring; 68. slot. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are further explained in detail below by describing the embodiments with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the concept and technical solution of the present invention.

[0032] like Figure 1-10 As shown, the present invention provides a hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head, comprising a hanging plate 1, a hydraulic bolt tensioner body 4, a fixing mechanism 5 and a slider mechanism 6. An axial hook 3 is connected to the center of the top of the hanging plate 1 through a bracket 2. A bracket 2 with a crossbeam structure is selected near the center of the hanging plate 1 because there is no slideway 11 hole. While ensuring the strength, the weight of consumables and components is reduced. The axial hook 3 is welded and connected to the hanging plate 1 at the center for horizontal lifting and movement by a crane to operate the horizontally placed cylinder head bolts. The side of the hanging plate 1 is connected to two radial hooks 13 through a side plate 12. The side plate 12 is an arc-shaped plate, and the curvature of the lower surface of the plate is the same as that of the hanging plate. 1 has the same side curvature and is connected to the side surface of the hanging plate 1 by welding. The hanging plate 1 and the side plate 12 are welded with a number of reinforcing ribs to ensure the strength during lifting. A number of slideways 11 are evenly distributed along the circumference of the hanging plate 1, so that the entire hydraulic bolt tensioner body 4 can slide along the slideway 11 to the corresponding cylinder head bolt center circle groove 68 when stretching cylinder head bolts with different center circles. The two radial hooks 13 are arranged to ensure that when operating cylinder head bolts with different center circles, the hydraulic bolt tensioner body 4 needs to replace the slideway 11, and different radial hooks 13 need to be selected according to different slideways 11, so that the hydraulic bolt tensioner body 4 corresponds to the cylinder head bolt position.

[0033] The hydraulic bolt tensioner body 4 is provided with several and spaced below the slide 11, and the fixing mechanism 5 is provided on the hydraulic bolt tensioner body 4. The fixing mechanism 5 includes a U-shaped card 51, a support beam 53 and a fixing block 54. The U-shaped card 51 is provided with two and symmetrically arranged on the side of the hydraulic bolt tensioner body 4. Both ends of each U-shaped card 51 are provided with folded edges 52, and the two folded edges 52 on the same side are connected by fastening bolts 55. The outer side of each U-shaped card 51 is provided with a support beam 53, and the top of the support beam 53 is provided with a semicircular fixing block 54. The inner arc curvature of the U-shaped card 51 is consistent with the side curvature of the hydraulic bolt tensioner body 4 to ensure smooth fixation. One section of the support beam 53 is welded to the center of the U-shaped card 51, and one section is welded to the bottom of the fixing block 54. The fixing block 54 is a semicircular structure and its top is used for bolting with the slider mechanism 6. The two U-shaped clamps 51 are located between the oil pressure port and the ratchet of the hydraulic bolt tensioner body 4, and the two U-shaped clamps 51 are fixed with a fastening bolt 55;

[0034] The slider mechanism 6 is arranged on the slideway 11 and is used to limit the corresponding fixing mechanism 5 and the hydraulic bolt tensioner body 4. The slider mechanism 6 includes a chassis 61, a stud 63, a sliding plate 64, a connecting bolt 65, a chuck 66 and a spring 67. The chassis 61 is connected to the fixing block 54 through a limiting bolt 62 and a stud 63 is provided at the center of the top thereof. The stud 63 passes through the slideway 11 and is threadedly connected to the sliding plate 64 above the hanging plate 1. The connecting bolt 65 is provided with two and is symmetrically arranged on both sides of the sliding plate 64. The connecting bolt 65 passes through the sliding plate 64 and its lower end is threadedly connected to the chuck 66 sleeved on the stud 63. The spring 67 is sleeved on the stud 63 and is located between the chuck 66 and the chassis 61. The bottom of the hanging plate 1 is provided with a groove 68 that matches the chuck 66 one by one. The chuck 66 and the groove 68 are clearance-fitted, and the depth of the groove 68 is much larger than the fitting clearance. The stud 63 and the two connecting bolts 65 of the entire slider mechanism 6 pass through the slide 11 and are clamped and fixed on the hanging plate 1 through the sliding plate 64 and the chuck 66. When the entire slider mechanism 6 is located in the slideway 11, press the two connecting bolts 65, which will push the chuck 66 to move downward and compress the spring 67, so that the chuck 66 is no longer in contact with the hanging plate 1. At this time, push the slide plate 644, and the slider mechanism 6 can move along the slideway 11 of the hanging plate 1. When it reaches the designated center circle position of the cylinder head bolt, the slider mechanism 6 moves to the slot 68 of the hanging plate 1. Under the reaction force of the compressed spring 67, the chuck 66 is pushed into the slot 68 of the hanging plate 1, and the slider mechanism 6 is fixed by the limiting effect of the slot 68.

[0035] Specific implementation and principle:

[0036] For the vertical cylinder head, the axial hook 3 on the hanging plate 1 is hoisted by a hoisting device such as a crane to move it to a suitable position directly above the cylinder head of the diaphragm compressor, and the two connecting bolts 65 on the slider mechanism 6 are pressed to disengage the upper surface of the chuck 66 at the lower part of the slider mechanism 6 from the lower surface of the hanging plate 1, and the sliding plate 64 at the upper part of the slider mechanism 6 is pushed to push the hydraulic bolt tensioner body 4 to the position of the slot 68 consistent with the cylinder head bolt, and the pressing connecting bolt 65 is released. Under the restoring force of the spring 67 on the stud 63, the chuck 66 moves upward until it enters the slot 68 and is tightened by the spring 67. Due to the limiting effect of the slot 68 on the chuck 66, the entire slider mechanism 6 is fixed at the slot 68 position corresponding to the center circle, and corresponds to the bolt at the center circle of the cylinder head bolt. Continue to move the entire tooling to a suitable position, and the cylinder head bolt can be installed and removed.

[0037] For a horizontal cylinder head, the axial hook 3 can be hoisted first to adjust the slider mechanism 6 to the appropriate center circle slot 68, and then the radial hook 13 corresponding to the slideway 11 of the cylinder head can be selected for hoisting. The vertical hoisting force is as follows: Figure 3 As shown, the chuck 66 of the slide 11 mechanism is fixed in the slot 68 of the lifting plate 1 under the force of the spring 67. When radial lifting is performed, the step of the slot 68 has a vertical supporting force on the chuck 66. The chuck 66 further supports the stud 63, and the stud 63 is bolted to the fixing mechanism 5 of the hydraulic bolt tensioner body 4. That is, under the action of this supporting force, the hydraulic bolt tensioner body 4 can be fixed horizontally without tipping over, thereby realizing the installation and disassembly of the cylinder head bolts of the horizontal cylinder head.

[0038] The above-described embodiments of the present invention do not constitute a limitation on the protection scope of the present invention. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A hydraulic bolt tensioner tool for a diaphragm compressor cylinder head, characterized in that: It comprises a hanging plate (1), a hydraulic bolt tensioner body (4), a fixing mechanism (5) and a slider mechanism (6); the center of the top of the hanging plate (1) is connected to an axial hook (3) via a bracket (2); the side of the hanging plate (1) is connected to a plurality of radial hooks (13) via a side plate (12); a plurality of slideways (11) are evenly distributed along the circumference of the hanging plate (1); the hydraulic bolt tensioner body (4) is provided with a plurality of slideways (11) which are arranged at intervals below the slideways (11); The fixing mechanism (5) is arranged on the hydraulic bolt tensioner body (4); The slider mechanism (6) is arranged on the slideway (11) and is used to limit the corresponding fixing mechanism (5) and the hydraulic bolt tensioner body (4).

2. The hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head according to claim 1 is characterized in that: The fixing mechanism (5) comprises a U-shaped card (51), a support beam (53) and a fixing block (54). The U-shaped card (51) is provided with two and is symmetrically arranged on the side of the hydraulic bolt tensioner body (4). Both ends of each U-shaped card (51) are provided with folded edges (52), and the two folded edges (52) on the same side are connected. The outer side of each U-shaped card (51) is provided with a support beam (53), and the top of the support beam (53) is provided with a semicircular fixing block (54).

3. A hydraulic bolt tensioner tool for a diaphragm compressor cylinder head according to claim 2, characterized in that: The slider mechanism (6) includes a chassis (61), a stud (63), a sliding plate (64), a connecting bolt (65), a chuck (66) and a spring (67). The chassis (61) is connected to both fixed blocks (54) and a stud (63) is provided at the center of the top thereof. The stud (63) passes through the slideway (11) and is threadedly connected to the sliding plate (64) above the hanging plate (1). Two connecting bolts (65) are provided and are symmetrically arranged on both sides of the sliding plate (64). The connecting bolt (65) passes through the sliding plate (64) and its lower end is threadedly connected to the chuck (66) sleeved on the stud (63). The spring (67) is sleeved on the stud (63) and is located between the chuck (66) and the chassis (61). The bottom of the hanging plate (1) is provided with a slot (68) that matches the chuck (66) one by one.

4. A hydraulic bolt tensioner tool for a diaphragm compressor cylinder head according to claim 3, characterized in that: There is a clearance fit between the chuck (66) and the chuck slot (68).

5. The hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head according to claim 3 is characterized by: The chassis (61) is connected to the fixing block (54) via a limiting bolt (62).

6. A hydraulic bolt tensioner tool for a diaphragm compressor cylinder head according to claim 2, characterized in that: The two folded edges (52) on the same side are connected by a fastening bolt (55).

7. The hydraulic bolt tensioner tooling for a diaphragm compressor cylinder head according to claim 1 is characterized in that: The number of the radial hooks (13) is two.

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