On-line special split type fastening and dismounting tool for piston rod

Abstract

The utility model relates to the technical field of piston rod fastening and dismounting tools, and particularly discloses an online special split type fastening and dismounting tool for a piston rod, the connecting end of the piston rod is in threaded connection with a compressor body, and the fastening and dismounting tool comprises a handle, a wrench and a combined suite arranged on the outer side of the piston rod in a matched mode. The connecting part of the wrench is connected with the handle, the wrench is provided with a crescent bayonet, the bayonet of the wrench is arranged on the outer side of the combined suite in an embracing mode, the bayonet of the wrench and the combined suite are fixed through a fixing assembly, the combined suite comprises a first half sleeve body and a second half sleeve body, and the first half sleeve body and the second half sleeve body are oppositely arranged. The first half sleeve body and the second half sleeve body are locked on the outer side of the piston rod through trapezoidal locking assemblies, and anti-rotation assemblies are arranged between the first half sleeve body and the piston rod and between the second half sleeve body and the piston rod. According to the fastening and dismounting tool, accurate fastening torque between the piston rod and the compressor body can be guaranteed, and meanwhile the problems that the space is narrow and rotation is limited can be solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of piston rod fastening and disassembling tools, in particular to an online special split-type fastening and disassembly tool for piston rods. Background Art

[0002] Reciprocating compressors have the advantages of low equipment price, low initial investment, easy operation, long service life, strong adaptability and a wide range of exhaust volume. They are also less affected by changes in exhaust pressure and have high thermal efficiency, and are widely used in chemical industry.

[0003] However, the reciprocating compressor has a complex structure, a large amount of maintenance, a small maintenance space inside the fuselage, and high requirements for maintenance data accuracy. At the same time, accurate tightening torque must be guaranteed. Therefore, it is necessary to tighten the piston rod and the compressor body in a smaller space to ensure accurate tightening torque. Ordinary box wrenches and socket wrenches cannot tighten the piston rod to the compressor body, and usually only open-end wrenches can be used for tightening or disassembly. However, due to the small space inside, the tightening or disassembly rotation space of the open-end wrench is limited, so accurate tightening torque cannot be guaranteed. Therefore, it is urgently needed to design a piston rod online special split tightening and disassembly tool to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a special split-type online fastening and disassembly tool for the piston rod, which solves the above-mentioned problem that the operating space is small and the wrench cannot be used to tighten and disassemble the piston rod, and at the same time the torque between the piston rod and the compressor body cannot be guaranteed.

[0005] In order to solve the above technical problems, the utility model provides a split-type fastening and disassembly tool for a piston rod, wherein the connecting end of the piston rod is threadedly connected to the compressor body, and the utility model is characterized in that the fastening and disassembly tool comprises a handle, a wrench and a combination kit arranged on the outside of the piston rod, the connecting portion of the wrench is connected to the handle, and the wrench is provided with a crescent-shaped bayonet, the bayonet of the wrench is arranged on the outside of the combination kit, and the bayonet of the wrench is fixed to the outside of the combination kit by a fixing assembly.

[0006] The combination kit includes a first half body and a second half body, which are arranged opposite to each other and locked to the outside of the piston rod through a trapezoidal locking assembly. An anti-rotation assembly is provided between the first half body, the second half body and the piston rod. When the handle is rotated, the wrench, the combination kit and the piston rod are driven to rotate accordingly to tighten or remove the piston rod.

[0007] Furthermore, the trapezoidal locking components are divided into two groups, and the two groups of trapezoidal locking components are arranged in parallel and opposite directions at the connection between the first half-shell and the second half-shell. Each group of the trapezoidal locking components includes a trapezoidal boss and a trapezoidal groove. The trapezoidal boss is arranged on the opposite surface of the first half-shell or the second half-shell, and the trapezoidal groove is opened on the opposite surface of the second half-shell or the first half-shell, and the trapezoidal boss cooperates with the trapezoidal groove to lock.

[0008] Furthermore, the anti-rotation assembly includes an anti-rotation sleeve and an anti-rotation groove formed by two half grooves. The inner wall of the anti-rotation sleeve and the outer wall of the piston rod are connected by a thread. The two half grooves are respectively opened on the opposite surfaces of the first half sleeve and the second half sleeve, and are arranged in an embraced manner on the outside of the anti-rotation sleeve.

[0009] Furthermore, the outer contour of the anti-rotation sleeve is a polygon with at least three sides.

[0010] Furthermore, the inner contours of the two half grooves are the same as the outer contour of the anti-rotation sleeve.

[0011] Furthermore, the fixing assembly includes a fixing column and a plurality of holes evenly distributed on the outer circumferential wall of the first half body and the second half body, the fixing column is fixed on the inner wall of the bayonet end, and the fixing column is fixed in conjunction with any one of the holes.

[0012] Furthermore, a connecting column is provided on the handle, a mounting groove cooperating with the connecting column is provided at the connecting portion of the wrench, and a limiting piece for preventing the wrench from being separated from the connecting column is provided on the connecting column.

[0013] The beneficial effects of the utility model are as follows: the fastening and disassembly tool of the utility model fastens the piston rod to the compressor body through the combined action of the assembly kit provided on the outer side of the piston rod, the fixing assembly between the assembly kit and the wrench bayonet, and the split-type connected handle and the wrench, thereby ensuring a precise fastening torque between the piston rod and the compressor body, and being able to fasten or detach the piston rod from the compressor body, and at the same time solving the problem of limited rotation in a narrow space;

[0014] The design of the assembly kit allows it to be locked to the outside of the piston rod by locking the trapezoidal boss and trapezoidal groove of the trapezoidal locking assembly, thereby solving the problem that the existing sleeve cannot be installed between the piston rod and the compressor body online, and also solves the problem that the existing tools cannot meet the rotation conditions in a small space.

[0015] The anti-rotation assembly is designed so that an anti-rotation sleeve can be rotatably mounted on the outside of the piston rod. The outer contour of the anti-rotation sleeve is at least a three-sided polygon. An anti-rotation groove having the same outer contour as the anti-rotation sleeve is provided in the middle of the opposing surfaces of the first and second half sleeves. This prevents the assembly from rotating relative to the piston rod, preventing the piston rod from rotating simultaneously to secure or remove it from the compressor body.

[0016] The design of the fixing assembly can make the bayonet of the wrench fit more tightly with the outer wall of the combination kit, thereby preventing the wrench from slipping sideways between the combination kit and the combination kit when turning, thereby improving the stable rotation force of the wrench and also preventing the wrench from slipping sideways and scratching the combination kit, thereby increasing the service life of the combination kit.

[0017] The design of the connecting column on the handle and the mounting groove on the wrench sleeved on the connecting column allows the wrench to be fixed to the connecting column on the handle through the limit piece, thereby improving the firmness of the connection between the wrench and the handle. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a structural diagram of a piston rod online special split fastening and disassembly tool with a combined kit installed on a compressor body;

[0020] Figure 2 This is a cross-sectional view of a piston rod of a utility model, a split-type fastening and disassembly tool for an online piston rod, with a combination kit, installed on a compressor body;

[0021] Figure 3 This is a partial view of a combination kit of a split-type online fastening and disassembly tool for a piston rod according to the present invention;

[0022] Figure 4 This is a structural diagram of the handle of a split-type fastening and disassembly tool for an online piston rod according to the present invention;

[0023] Figure 5 This is a structural diagram of a wrench for a split-type fastening and disassembly tool dedicated to an online piston rod according to the present invention;

[0024] In the figure: 1-piston rod, 2-compressor body, 3-fastening and disassembly tool, 31-handle, 32-wrench, 33-combination kit, 211-transverse main channel, 212-dividing channel, 311-connecting column, 322-mounting groove, 321-bayonet, 331-first half of the sleeve, 332-second half of the sleeve, 333-trapezoidal locking assembly, 334-anti-rotation assembly, 335-fixing assembly, 3331-trapezoidal boss, 3332-trapezoidal groove, 3341-anti-rotation sleeve, 3342-half groove, 3351-fixing column, 3352-hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings of the present invention specification to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the utility model.

[0026] In a specific embodiment of the present invention, Figure 1-Figure 5 As shown, a piston rod online special split fastening and disassembly tool is specifically disclosed. The connecting end of the piston rod 1 is threadedly connected to the compressor body 2. The fastening and disassembly tool 3 includes a handle 31, a wrench 32 and a combination kit 33 arranged on the outside of the piston rod 1. The connecting part of the wrench 32 is connected to the handle 31. The handle 31 is provided with a connecting column 311. The connecting part of the wrench 32 is provided with a mounting groove 322 that cooperates with the connecting column 311. The connecting column 311 is provided with a screw thread for preventing the wrench 32 from being disconnected. The limiting piece of the connecting column 311 can be a limiting nut, a limiting pin or a limiting sleeve. The design of the connecting column 311 on the handle 31 and the mounting groove 322 on the connecting column 311 on the wrench 32 can fix the wrench 32 on the connecting column 311 on the handle 31 through the limiting piece, and the connecting column 311 and the mounting groove 322 are polygonal in design, and the polygonal design of the two prevents the wrench 32 from rotating at the end of the handle 31, thereby improving the firmness of the connection between the wrench 32 and the handle 31.

[0027] The wrench 32 is provided with a crescent-shaped bayonet 321. The bayonet 321 of the wrench 32 is arranged on the outside of the assembly kit 33 and is fixed to the assembly kit 33 via a fixing assembly 335.

[0028] The assembly kit 33 includes a first half 331 and a second half 332. The first half 331 and the second half 332 are arranged opposite each other and locked to the outside of the piston rod 1 via a trapezoidal locking assembly 333. An anti-rotation assembly 334 is provided between the first half 331 and the second half 332 and the piston rod 1. When the handle 31 is rotated, the wrench 32, the assembly kit 33, and the piston rod 1 rotate accordingly, thereby tightening or removing the piston rod 1.

[0029] There are two groups of trapezoidal locking components 333, which are arranged in parallel and opposite directions at the connection between the first half of the casing 331 and the second half of the casing 332. Each group of trapezoidal locking components 333 includes a trapezoidal boss 3331 and a trapezoidal groove 3332. The trapezoidal boss 3331 is arranged on the opposite surface of the first half of the casing 331 or the second half of the casing 332, and the trapezoidal groove 3332 is opened on the opposite surface of the second half of the casing 332 or the first half of the casing 331. The trapezoidal boss 3331 and the trapezoidal groove 3332 cooperate and lock. In other embodiments, the trapezoidal boss 3331 and the trapezoidal groove 3332 can be a T-shaped boss and a T-shaped groove, and the transverse direction of the T-shaped boss can be a polygonal boss with at least three sides, and the T-shaped groove has the same profile as the T-shaped boss.

[0030] The design of the combination kit 33 allows it to be locked to the outside of the piston rod 1 by locking the trapezoidal boss 3331 and the trapezoidal groove 3332 of the trapezoidal locking assembly 333, so as to solve the problem that the existing sleeve cannot be installed online between the piston rod 1 and the compressor body 2, and at the same time solve the problem that the existing tools cannot meet the rotation conditions in a small space.

[0031] The anti-rotation assembly 334 includes an anti-rotation sleeve 3341 and an anti-rotation groove formed by two half grooves 3342. The inner wall of the anti-rotation sleeve 3341 is threadedly connected to the outer wall of the piston rod 1. The two half grooves 3342 are respectively opened on the opposite surfaces of the first half sleeve 331 and the second half sleeve 332, and are embraced and arranged on the outer side of the anti-rotation sleeve 3341. The design of the anti-rotation assembly 334 can allow the anti-rotation sleeve 3341 to be rotatably provided on the outside of the piston rod 1, and the outer contour of the anti-rotation sleeve 3341 is a polygon with at least three sides, and an anti-rotation groove with the same outer contour as the anti-rotation sleeve 3341 is opened in the middle of the opposite surfaces of the first half sleeve 331 and the second half sleeve 332. The inner contour of the two half grooves 3342 is the same as the outer contour of the anti-rotation sleeve 3341, so as to prevent the combination kit 33 from rotating with the piston rod 1 during rotation, and unable to drive the piston rod 1 to rotate at the same time to fasten or remove it from the compressor body 2.

[0032] The fixing assembly 335 includes a fixing column 3351 and a plurality of holes 3352 evenly distributed on the outer peripheral wall of the first half sleeve 331 and the second half sleeve 332. The fixing column 3351 is fixedly set on the inner wall of the end of the bayonet 321. The fixing column 3351 is fixed in cooperation with any one of the holes 3352. The design of the fixing assembly 335 can make the bayonet 321 of the wrench 32 fit more tightly with the outer wall of the combination kit 33 to prevent the wrench 32 from slipping sideways with the combination kit 33 when being turned, thereby improving the stable rotational force of the wrench 32. At the same time, it can also avoid the problem of the wrench 32 slipping sideways and scratching the combination kit 33, thereby improving the service life of the combination kit 33.

[0033] The workflow of this utility model:

[0034] Open the side of the piston cylinder at the lower part of the compressor body 2, and install the piston to one end of the piston rod 1, and rotate the anti-rotation sleeve 3341 to the threaded section of the piston rod 1. When the piston rod 1 needs to be screwed into the compressor body 2 for online maintenance, the piston rod 1 is inserted into the piston cavity through the bottom of the piston cylinder of the equipment, and the threaded section of the piston rod 1 with the anti-rotation sleeve 3341 is manually screwed into the compressor body 2 from the side, and the inner wall of the half groove 3342 on the opposite surface of the first half sleeve 331 and the second half sleeve 332 is fit with the outer contour of the anti-rotation sleeve 3341, and at the same time, the trapezoidal boss 3331 is matched and locked with the trapezoidal groove 3332, so that the assembly kit 33 can be fitted on the outer wall of the anti-rotation sleeve 3341;

[0035] The mounting groove 322 on the wrench 32 is put on the connecting column 311 on the handle 31, and the connecting column 311 and the mounting groove 322 are polygonal in design, and the polygonal design of the two is to prevent the wrench 32 from rotating at the end of the handle 31. After the installation is completed, the position is limited by the limiter to prevent the wrench 32 from separating from the handle 31. The bayonet 321 of the wrench 32 of the connected tool is held on the outside of the first half body 331 and / or the second half body 332 of the combination kit 33, and the fixing column 3351 on the inner wall of the bayonet 321 is inserted into the first half body 331 and / or the second half body 332 of the combination kit 33, and the fixing column 3351 on the inner wall of the bayonet 321 is inserted into the second half body 331 at the appropriate position. The first half of the sleeve 331 and / or the second half of the sleeve 332 are placed in the hole 3352, and the handle 31 is pulled to drive the wrench 32, the assembly kit 33 and the piston rod 1 to rotate accordingly. The position of the handle 31 is adjusted to adjust the force. During the rotation, the fixed position of the fixing column 3351 and the hole 3352 is continuously changed, so that the piston rod 1 is fastened to the compressor body 2, so as to ensure the accurate fastening torque between the piston rod 1 and the compressor body 2, and the piston rod 1 can be fastened or detached from the compressor body 2, and at the same time, the problem of limited rotation in a narrow space can be solved.

[0036] If the piston rod 1 needs to be removed, the bayonet 321 of the wrench 32 is held in reverse on the outside of the first half sleeve 331 and / or the second half sleeve 332 of the combination kit 33, and the handle 31 is rotated counterclockwise to drive the wrench 32, the combination kit 33 and the piston rod 1 to rotate accordingly. The position of the handle 31 is adjusted to adjust the degree of force. During rotation, the fixed position of the fixing column 3351 and the hole 3352 is continuously changed, so that the piston rod 1 is removed from the compressor body 2, solving the problem of narrow online operation space and limited rotation.

[0037] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A split-type fastening and disassembly tool for piston rods, wherein the connecting end of the piston rod (1) is threadedly connected to the compressor body (2), characterized in that: The fastening and disassembly tool (3) comprises a handle (31), a wrench (32), and a combination kit (33) arranged on the outside of the piston rod (1); the connecting portion of the wrench (32) is connected to the handle (31), and the wrench (32) is provided with a crescent-shaped bayonet (321); the bayonet (321) of the wrench (32) is arranged on the outside of the combination kit (33), and the bayonet (321) of the wrench (32) is fixed to the combination kit (33) by a fixing component (335). The combination kit (33) comprises a first half-body (331) and a second half-body (332), wherein the first half-body (331) and the second half-body (332) are arranged relative to each other and locked to the outside of the piston rod (1) via a trapezoidal locking assembly (333). An anti-rotation assembly (334) is provided between the first half-body (331), the second half-body (332) and the piston rod (1). When the handle (31) is rotated, the wrench (32), the combination kit (33) and the piston rod (1) are driven to rotate accordingly, so as to tighten or remove the piston rod (1).

2. The piston rod online dedicated split fastening and disassembly tool according to claim 1, characterized in that: The trapezoidal locking components (333) are in two groups. The two groups of trapezoidal locking components (333) are arranged in parallel and in opposite directions at the connection between the first half-shell (331) and the second half-shell (332). Each group of the trapezoidal locking components (333) includes a trapezoidal boss (3331) and a trapezoidal groove (3332). The trapezoidal boss (3331) is arranged on the opposite surface of the first half-shell (331) or the second half-shell (332). The trapezoidal groove (3332) is provided on the opposite surface of the second half-shell (332) or the first half-shell (331) which are arranged opposite to each other; the trapezoidal boss (3331) on the first half-shell (331) and the trapezoidal groove (3332) on the second half-shell (332) are matched and locked; the trapezoidal boss (3331) on the second half-shell (332) and the trapezoidal groove (3332) on the first half-shell (331) are matched and locked.

3. The piston rod online dedicated split fastening and disassembly tool according to claim 2, characterized in that: The anti-rotation assembly (334) includes an anti-rotation sleeve (3341) and an anti-rotation groove formed by two half grooves (3342). The inner wall of the anti-rotation sleeve (3341) and the outer wall of the piston rod (1) are connected by a thread. The two half grooves (3342) are respectively opened on the opposite surfaces of the first half sleeve (331) and the second half sleeve (332), and are arranged in an embraced manner on the outer side of the anti-rotation sleeve (3341).

4. The piston rod online dedicated split fastening and disassembly tool according to claim 3, characterized in that: The outer contour of the anti-rotation sleeve (3341) is a polygon with at least three sides.

5. The piston rod online dedicated split fastening and disassembly tool according to claim 3, characterized in that: The inner contours of the two half grooves (3342) are the same as the outer contour of the anti-rotation sleeve (3341).

6. The piston rod online dedicated split fastening and disassembly tool according to claim 1, characterized in that: The fixing assembly (335) includes a fixing column (3351) and a plurality of holes (3352) evenly distributed on the outer peripheral walls of the first half-shell (331) and the second half-shell (332). The fixing column (3351) is fixedly arranged on the inner wall of the end of the bayonet (321), and the fixing column (3351) is fixedly engaged with any one of the holes (3352).

7. The piston rod online dedicated split fastening and disassembly tool according to claim 1, characterized in that: The handle (31) is provided with a connecting column (311), a connecting portion of the wrench (32) is provided with a mounting groove (322) that matches the connecting column (311), and the connecting column (311) is provided with a limiting piece for preventing the wrench (32) from being separated from the connecting column (311).

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