Auxiliary rapid disassembly hydraulic tool for plate heat exchanger

Abstract

The utility model discloses an auxiliary quick disassembly hydraulic tool for a plate heat exchanger, which comprises a support, a hydraulic stretcher, a positioning nut, a fixing screw rod and a fixing nut, the support is mounted on the fixing screw rod, the hydraulic stretcher is mounted on the outer side of the fixing screw rod close to the upper side of the support, and the positioning nut is mounted on the fixing screw rod. A flat gasket is installed on the upper side, close to the hydraulic stretcher, of the outer side of the fixing screw rod, and a positioning nut is installed on the upper side, close to the flat gasket, of the outer side of the fixing screw rod. According to the auxiliary hydraulic tool for rapidly disassembling the plate heat exchanger, the auxiliary tool is simple in structure and convenient to use, safe disassembly and assembly of a conventional plate heat exchanger can be conveniently achieved, bolts can be rapidly disassembled and assembled, multi-position and multi-sequence rapid alternate fastening can be conducted through the special structural design of the auxiliary tool, and the auxiliary tool is convenient to use. The trouble that a positioning nut is replaced on a long fixing screw of a traditional hydraulic tool is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchanger repair tools, in particular to a plate-type heat exchanger auxiliary rapid disassembly hydraulic tool. Background Art

[0002] At present, plate heat exchangers are widely used in the shipbuilding industry due to their efficient heat exchange effect, such as high and low temperature fresh water coolers, lubricating oil coolers, fresh water generators, etc. At present, most ships use traditional extended wrenches for disassembly and assembly, which is time-consuming and laborious, and there are phenomena of plate deformation due to uneven force, excessive pressure, and plate deformation. At the least, it takes time to rework and waste precious maintenance time to affect the ship schedule, and at the worst, it causes equipment damage and affects the normal operation of the ship. For example, the main engine damage accident caused by water-oil mixing due to uneven force and misalignment of rubber strips, the high temperature of the main and auxiliary cooling water caused by water leakage, and the deformation of the plate affects the efficiency and quality of water making. Common accident phenomena. Ships are forced to stop for emergency maintenance from time to time, which has a great impact on the navigation safety of ships and the operation and production of equipment. Therefore, for ships equipped with a large number of plate heat exchangers, whether it is routine maintenance or emergency repair disassembly and inspection, a suitable special tool is needed, which can not only quickly and effectively disassemble and install, but also safely and efficiently complete the maintenance task, saving maintenance costs and precious maintenance time for ships.

[0003] Although the plate heat exchanger has the characteristics of good heat exchange effect and simple maintenance, it can be cleaned by chemical circulation to maintain thermal efficiency. However, regular manual disassembly and mechanical cleaning are necessary to ensure better working results. The general practice is to use an extended ratchet wrench for manual disassembly and assembly, which is time-consuming and labor-intensive, and requires a large number of manpower to take turns to disassemble and assemble the bolts, especially when tightening. In order to prevent the deformation of the plate, it is necessary to measure the distance repeatedly and tighten the bolts diagonally in rotation. In some emergency repair times, it will cause the ship to be in a passive situation (for example, if there is only one lubricating oil cooler, if it fails, the ship cannot set sail). In particular, the wrong practice of tightening it once in violation of regulations in order to save effort and trouble often causes plate deformation and rubber damage. If the ship's spare parts are insufficient, it will seriously affect the operating schedule. Utility Model Content

[0004] The main purpose of the utility model is to provide a plate heat exchanger auxiliary quick disassembly hydraulic tool, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A hydraulic tool for assisting quick disassembly of a plate heat exchanger comprises a bracket, a hydraulic tensioner, a positioning nut, a fixing screw and a fixing nut. The fixing screw is provided with a bracket, a hydraulic tensioner is provided on the outer side of the fixing screw near the upper side of the bracket, a flat gasket is provided on the outer side of the fixing screw near the upper side of the hydraulic tensioner, and a positioning nut is provided on the outer side of the fixing screw near the upper side of the flat gasket.

[0007] Preferably, a hydraulic interface is installed on the outside of the hydraulic stretcher, a safety indicator with a displacement scale is installed on the top of the hydraulic stretcher close to the upper side of the fixed screw, and a return spring is installed inside the hydraulic stretcher.

[0008] Preferably, the axis lines of the bracket, hydraulic stretcher, positioning nut and flat washer are located on the same straight line.

[0009] Preferably, the safety indicator is located on the upper side of the hydraulic tensioner close to the positioning nut, has a displacement scale indicator, and is provided with a reset spring.

[0010] Preferably, an opening is provided at one end of the bracket, and a nut pull sleeve and a pull rod are installed on the inner side of the opening. The bracket is cylindrical in design with a bottom edge at one end and a retaining ring groove at the other end. The nut pull sleeve and the bracket are fixed as a whole using a retaining ring. The nut pull sleeve is circular on the outside, and the outer ring has six groups of evenly distributed circular holes, the diameter of which is adapted to the outer diameter of the pull rod, and a hexagonal or polygonal opening of the same size as the outer diameter of the nut is provided inside, which is adapted according to the size of the nut to be disassembled and inspected.

[0011] Preferably, the positioning nut is of combined design, consisting of a Haver nut with two inner halves and a circular outer halves with an internal thread that matches the thread of the fixing screw, a cylindrical outer sleeve with a bottom edge, the inner diameter of which matches the outer diameter of the Haver nut, and a magnetic flat washer. The positioning nut and the Haver nut can be combined into one to form a positioning nut assembly.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] The auxiliary tool has a simple structure and is easy to use. It is convenient for realizing the safe disassembly and assembly of conventional plate heat exchangers. It can not only quickly disassemble and assemble bolts, but also use its special structural design to perform rapid rotation and tightening in multiple positions and multiple sequences. There is no need to face the trouble of replacing positioning nuts on longer fixed screws with traditional hydraulic tools. At the same time, the hydraulic tool has a safety indication design to cope with uniform installation force, and limits the effective lift of hydraulic bolts according to installation requirements to prevent damage to equipment caused by one-step illegal operation. It can effectively avoid major accidents caused by heat exchanger failure and damage that seriously affect the ship's schedule, and reduce the workload of personnel. It can be vigorously promoted. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The overall structure of a plate heat exchanger auxiliary quick disassembly hydraulic tool of the utility model is shown in FIG. Figure 1 ;

[0015] Figure 2 The overall structure of a plate heat exchanger auxiliary quick disassembly hydraulic tool of the utility model is shown in FIG. Figure 2 ;

[0016] Figure 3 The utility model is a partial structural schematic diagram of a hydraulic tool for assisting rapid disassembly of a plate-type heat exchanger.

[0017] In the figure: 1. bracket; 2. hydraulic tensioner; 3. positioning nut; 4. lever; 5. fixing screw; 6. hydraulic interface; 7. safety indicator; 8. fixing nut; 9. retaining ring; 10. nut sleeve; 11. Haver nut; 12. flat washer. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] like Figure 1-3 As shown, a plate heat exchanger auxiliary quick disassembly hydraulic tool includes a bracket 1, a hydraulic stretcher 2, a positioning nut 3, a fixing screw 5, and a fixing nut 8. The bracket 1 is installed on the fixing screw 5, the hydraulic stretcher 2 is installed on the outer side of the fixing screw 5 near the upper side of the bracket 1, the flat gasket 12 is installed on the outer side of the fixing screw 5 near the upper side of the hydraulic stretcher 2, and the positioning nut 3 is installed on the outer side of the fixing screw 5 near the upper side of the flat gasket 12.

[0020] In this embodiment, a hydraulic interface 6 is installed on the outside of the hydraulic tensioner 2, and a safety indicator 7 with a displacement scale is installed on the top of the hydraulic tensioner 2 near the upper side of the fixed screw 5. A reset spring is installed inside the hydraulic tensioner 2. The axis lines of the bracket 1, the hydraulic tensioner 2, the positioning nut 3, and the flat gasket 12 are located on the same straight line. The safety indicator 7 is located on the upper side of the hydraulic tensioner 2 near the side of the positioning nut 3, with a displacement scale indication, and a reset spring. An opening is opened at one end of the bracket 1, and a nut sleeve 10 and a lever 4 are installed on the inner side of the opening. The bracket 1 is a cylindrical design with a bottom edge at one end and a retaining ring groove at the other end. The retaining ring 9 is used to fix the nut sleeve 10 and the bracket 1 as a whole. The nut sleeve 10 is circular on the outside, and the outer ring has six groups of evenly distributed circular holes, the diameter of which is adapted to the outer diameter of the lever 4, and a hexagonal or polygonal opening of the same size as the outer diameter of the nut is opened inside, which needs to be adapted according to the size of the nut to be disassembled and inspected.

[0021] Specifically, first remove the protective cover on the bolt, insert the self-made bracket 1 into the fixed screw 5 of the plate heat exchanger, insert the hexagonal nut inside the bracket 1 into the fixed nut 8 of the plate heat exchanger, then insert the hydraulic tensioner 2 onto the fixed screw 5, then insert the flat washer 12 in the positioning nut 3 onto the fixed screw 5, then put the semicircular internal threaded nut in the positioning nut 3 onto the screw, and use the magnetic function of the flat washer 12 to better ensure that it will not fall off, and then put the outer shell type limiting sleeve of the positioning nut 3 into the fixed screw 5 so that its inner wall and the outer wall of the semicircular nut are in contact with each other. The edges are fitted together to form a whole, the opening position of the bracket 1 is adjusted to the operator's side, the hydraulic interface 6 of the hydraulic tensioner 2 is connected to the hand pump, and after closing the oil return valve of the oil pump, the pump pressure is started. When the hydraulic tensioner 2 is extended and against the fixed plate of the heat exchanger, the lever 4 can be inserted into the round hole on the nut sleeve 10, and the fixing nut 8 can be loosened or tightened. After the disassembly is completed, the hydraulic pump is first depressurized, and the hydraulic tensioner 2 is automatically disengaged and reset under the action of the spring. The positioning nut 3 can remove the limiting sleeve and directly take out the two semicircular nuts to complete the rapid removal and transfer of the tool.

[0022] In this embodiment, the positioning nut 3 is of a combined design, consisting of two inner halves and a Haver nut 11 with a circular outer portion and an internal thread that matches the thread of the fixing screw 5, a cylindrical outer sleeve with a bottom edge, the inner diameter of which matches the outer diameter of the Haver nut 11, and a magnetic flat washer 12. The positioning nut 3 and the Haver nut 11 can be combined into one to form a positioning nut 3 assembly.

[0023] Specifically, when the hydraulic stretcher 2 is extended and presses against the fixed plate of the heat exchanger, the lever 4 can be used to rotate the fixing nut 8 to tighten the nut. The displacement balance of the tightening bolt can be compared according to the scale of the safety indicator 7. When the safety indicator 7 on the hydraulic stretcher 2 shows the red area, consider replacing another fixing bolt and tightening it diagonally to prevent the one-step operation from causing irreparable deformation to the plate.

[0024] Working principle:

[0025] In the process of disassembling the bolts of the plate heat exchanger, first remove the protective cover on the bolt, insert the self-made bracket 1 into the fixed screw 5 of the plate heat exchanger, insert the nut sleeve 10 inside the bracket 1 into the fixed nut 8 of the plate heat exchanger, then insert the hydraulic tensioner 2 onto the fixed screw 5, then insert the flat gasket 12 in the positioning nut 3 onto the fixed screw 5, and then buckle the semicircular internal thread nut in the positioning nut 3 onto the screw in turn. The magnetic function of the flat gasket 12 can better ensure that it does not fall off, and then insert the outer shell type limiting sleeve of the positioning nut 3 into the fixed screw 5 so that its inner The wall and the outer edge of the semicircular nut are fitted together to form a whole. Adjust the opening position of the bracket 1 to the operator's side, connect the hydraulic interface 6 of the hydraulic tensioner 2 to the hand pump, close the oil pump return valve, and start pumping. When the hydraulic tensioner 2 is extended and against the fixed plate of the heat exchanger, the lever 4 can be inserted into the round hole on the nut sleeve 10, and the fixed nut 8 can be loosened or tightened. After the disassembly is completed, the hydraulic pump first releases pressure, and the hydraulic tensioner 2 is automatically disengaged and reset under the action of the spring. The positioning nut 3 can remove the limiting sleeve and directly take out the two semicircular nuts to complete the rapid removal and transfer of the tool. When the hydraulic tensioner 2 is extended and against the fixed plate of the heat exchanger, the lever 4 can be used to tighten the fixed nut 8. The displacement balance of the bolt tightening can be compared according to the scale of the safety indicator 7. When the safety indicator 7 on the hydraulic tensioner 2 shows the red area, consider replacing another fixing bolt to tighten it diagonally to prevent the one-step operation from causing irreparable deformation to the plate.

[0026] The auxiliary tool has a simple structure and is easy to use. It is convenient for realizing the safe disassembly and assembly of conventional plate heat exchangers. It can not only quickly disassemble and assemble bolts, but also use its special structural design to perform rapid rotation and tightening in multiple positions and in multiple sequences. There is no need to face the trouble of replacing the positioning nut 3 on the longer fixing screw 5 with traditional hydraulic tools. At the same time, the hydraulic tool has a safety indication design and an automatic reset design to cope with the uniform installation force, and limits the effective lift of the hydraulic bolt according to the installation requirements to prevent damage to the equipment caused by one-step illegal operation. It can effectively avoid major accidents that seriously affect the sailing schedule due to heat exchanger failure and damage, and reduce the workload of personnel. It can be vigorously promoted.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A hydraulic tool for assisting rapid disassembly of a plate heat exchanger, comprising a bracket (1), a hydraulic tensioner (2), a positioning nut (3), a fixing screw (5), and a fixing nut (8), characterized in that: A bracket (1) is mounted on the fixing screw (5), a hydraulic tensioner (2) is mounted on the outer side of the fixing screw (5) close to the upper side of the bracket (1), a flat washer (12) is mounted on the outer side of the fixing screw (5) close to the upper side of the hydraulic tensioner (2), and a positioning nut (3) is mounted on the outer side of the fixing screw (5) close to the upper side of the flat washer (12).

2. The plate heat exchanger auxiliary quick disassembly hydraulic tool according to claim 1, characterized in that: The hydraulic tensioner (2) is provided with a hydraulic interface (6) on the outside, a safety indicator (7) with a displacement scale is provided on the top of the hydraulic tensioner (2) close to the upper side of the fixing screw (5), and a return spring is provided inside the hydraulic tensioner (2).

3. The plate heat exchanger auxiliary quick disassembly hydraulic tool according to claim 2, characterized in that: The axis lines of the bracket (1), the hydraulic tensioner (2), the positioning nut (3), and the flat washer (12) are located on the same straight line.

4. The plate heat exchanger auxiliary rapid disassembly hydraulic tool according to claim 2, characterized in that: The safety indicator (7) is located on the upper side of the hydraulic tensioner (2) close to the positioning nut (3), has a displacement scale indicator, and is provided with a reset spring.

5. The plate heat exchanger auxiliary rapid disassembly hydraulic tool according to claim 2, characterized in that: One end of the bracket (1) is provided with an opening, and a nut sleeve (10) and a lever (4) are installed inside the opening. The bracket (1) is of cylindrical design with a bottom edge at one end and a retaining ring groove at the other end. The retaining ring (9) is used to fix the nut sleeve (10) and the bracket (1) as a whole. The nut sleeve (10) is circular on the outside, and has six groups of evenly distributed circular holes on the outer ring, the diameter of which matches the outer diameter of the lever (4). A hexagonal or polygonal opening of the same size as the outer diameter of the nut is opened inside, and is adapted according to the size of the nut to be disassembled and inspected.

6. The plate heat exchanger auxiliary rapid disassembly hydraulic tool according to claim 2, characterized in that: The positioning nut (3) is of a combined design, comprising a Haver nut (11) with two inner halves and a circular outer halves having an internal thread adapted to the thread of the fixing screw (5), a cylindrical outer sleeve with a bottom edge, the inner diameter of which is adapted to the outer diameter of the Haver nut (11), and a flat washer (12) with magnetism, so that the positioning nut (3) and the Haver nut (11) can be combined into one body to form a positioning nut (3) assembly.

Images