Fastening and dismounting device for super nut

Abstract

The utility model discloses a fastening and dismounting device for a super nut, which comprises a positioning part, a transmission part and at least one supporting part, the positioning part is of an annular structure and is used for being connected with an outer ring of the super nut, the transmission part is arranged on one side of the positioning part through the supporting part, a connecting part is arranged on the transmission part, and the supporting part is used for supporting the super nut. And the connecting part is used for connecting a torque applying device. According to the embodiment of the utility model, the fastening and dismounting effect of the super nut in production practice can be greatly improved, the fastening and dismounting periodicity of the super nut can be shortened, the cost is controllable, the manufacturing is simple, and specific torque can be applied to the super nut, so that the locking of the super nut is more reliable.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of nut dismounting device, specifically, relate to a kind of fastening dismounting device for super nut. BACKGROUND

[0002] As the core component of oil field operation, plunger pump is often used in cementing, acidizing and fracturing operation. Under the drive of external diesel engine or motor, plunger pump reciprocates to realize the pumping of high-pressure liquid. As the core component of plunger pump, hydraulic end assembly plays a crucial role in the pumping of medium in cementing, acidizing and fracturing operation. The reciprocating movement of plunger of hydraulic end assembly causes the periodic change of sealing cavity volume, thereby realizing the suction and discharge of medium in high-pressure environment. The entire hydraulic end assembly is fixed to the power end assembly by connecting long bolts. Since the bottom of hydraulic end assembly is connected to the liquid supply manifold, the hydraulic end assembly can usually be fixed to the power end assembly of plunger pump by nut connection at the end of long lead screw (or long bolt). Usually, this structure adopts cantilever support form.

[0003] However, when plunger pump reciprocates, the entire system is in a high-pressure and alternating dynamic load operating environment. The static load of commonly used 5-cylinder hydraulic end assembly can reach 3-4 tons. Therefore, the connecting nut needs to withstand sufficient torque, and it is also convenient to disassemble, install and maintain. In the prior art, super nut is usually used. Although super nut meets the use, it brings new problems in practical use, i.e. the disassembly and installation of super nut cannot be quickly realized.

[0004] In view of the widespread use of super nut, during the replacement and maintenance of hydraulic end assembly, it is usually required to complete the replacement and put into use as soon as possible to meet the production needs. There are special hydraulic tools for tightening and dismounting super nut, but the manufacturing cost of the tool is high, which greatly reduces its practicability, and often leads to the use of manual method to tighten super nut. In addition, the fixing torque of super nut cannot be accurately reflected by numbers. Too large torque causes disassembly difficulty, and too small torque easily causes the falling risk of hydraulic end assembly, which exists the hidden danger of safety accident. INVENTION CONTENTS

[0005] Therefore, the utility model aims to provide a fastening and dismounting device for super nut to solve the technical problems that super nut cannot be quickly disassembled and the dismounting tool cannot quantify torque in the prior art.

[0006] The utility model provides a fastening and dismounting device for super nut, including positioning portion, transmission part and at least one support, the positioning portion is annular structure, it is used for with the outer ring connection of super nut, transmission part passes through the support and sets up one side of positioning portion, sets up the connecting portion on transmission part, the connecting portion is used for connecting torque exertion device.

[0007] In some embodiments, the positioning portion is sleeved on the outer ring of the super nut, and the positioning portion has a predetermined thickness along the connection direction of the super nut.

[0008] In some embodiments, the positioning portion and the transmission portion have a predetermined distance along the connection direction of the super nut.

[0009] In some embodiments, the transmission portion is concentrically arranged with the positioning portion, the inner diameter of the positioning portion is greater than the outer diameter of the super nut, and the outer diameter of the transmission portion is less than the inner diameter of the super nut.

[0010] In some embodiments, the support is arranged between the outer surface of the transmission portion and the inner ring of the positioning portion.

[0011] In some embodiments, the support is a plate structure which can be inserted between two adjacent bolts on the super nut.

[0012] In some embodiments, the support is a plurality of supports which are arranged symmetrically based on the center of the transmission portion.

[0013] In some embodiments, the support is a plurality of supports which are arranged radially outward based on the center of the transmission portion.

[0014] In some embodiments, the plurality of supports are arranged at a predetermined angle along the outer surface of the transmission portion.

[0015] In some embodiments, the predetermined angle is one of 60°, 90°, and 120°.

[0016] The utility model embodiment can greatly improve the fastening and dismounting effect of the super nut in production practice, shorten the periodicity of the super nut fastening and dismounting, and control the cost and simplify the manufacturing process. Moreover, the specific torque can be applied to the super nut, and the anti-loose of the super nut is more reliable.

[0017] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the following preferred embodiments are described in detail below, and the accompanying drawings are described as follows. BRIEF DESCRIPTION OF DRAWINGS

[0018] In the drawings, which are not necessarily drawn to scale, like numerals describe similar components throughout the several views. Like numerals having different letter suffixes can represent different instances of the components. The drawings illustrate generally, by way of example, various embodiments discussed herein, and are not intended to limit the disclosure to the embodiments depicted. The same or similar reference numerals can be used in different drawings to represent similar or same components. Such embodiments are examples only, and are not intended to be limiting. The figures are intended to be illustrative, and not restrictive, of the present invention. The illustrative embodiments of the present invention and the description herein are used to explain the present invention and are not intended to be limiting of the present invention. In the drawings:

[0019] Figure 1 is a structural schematic diagram of an existing plunger pump;

[0020] Figure 2 is a structural schematic diagram of an existing plunger pump;

[0021] Figure 3 is a structural schematic diagram of an existing super nut;

[0022] Figure 4 is a structural schematic diagram of an existing super nut;

[0023] Figure 5 is a structural schematic diagram of an existing super nut;

[0024] Figure 6 is a structural schematic diagram of an existing super nut;

[0025] Figure 7 is a structural schematic diagram of an existing super nut.

[0026] Among the above drawings, the following reference numerals are included:

[0027] 1-positioning part; 2-supporting part; 3-transmission part; 4-connecting part; 10-power end assembly; 20-hydraulic end assembly; 30-super nut; 31-nut body; 32-outer ring; 33-inner ring; 34-bolt. DETAILED DESCRIPTION

[0028] In the following, specific embodiments of the present application will be described in detail with reference to the accompanying drawings, but not as a limitation of the present application.

[0029] It is to be understood that various modifications can be made to the embodiments disclosed herein. Thus, the description is not to be considered as limiting, but merely as a description of exemplary embodiments. Other modifications of the application will occur to those skilled in the art upon reading the description of the application. It is intended that the scope of the application should be determined by the scope of the appended claims and their equivalents.

[0030] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and, together with the general description of the application given above, and the detailed description of the embodiments given below, serve to explain the principles of the present application.

[0031] These and other characteristics of the present application will become apparent upon consideration of the following description of preferred forms of the application given herein with reference to the accompanying drawings.

[0032] It is also to be understood that, although a certain specific embodiment has been fully described above with reference to a number of specific aspects, embodiments, and details thereof, still many other equivalents and modifications can be made by those skilled in the art without departing from the spirit and scope of the application as defined in the claims.

[0033] The above and other aspects, features and advantages of the present application will become apparent upon consideration of the following detailed description taken in conjunction with the accompanying drawings, in which:

[0034] Specific embodiments of the present application are described hereinafter with reference to the drawings; however, these disclosed embodiments are merely exemplary and those skilled in the art will recognize many variations that are within the spirit and scope of the present application. As will be apparent to those skilled in the art, the specific structural and functional details described herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present application.

[0035] It has to be noted that, here and in the following claims, the terms "first", "second", etc. do not connote any prioritization, but are used as labels for the purpose of distinguishing between the different elements of the application. It is further understood that the use of relational terms such as first, second and the like, if any, are used solely to distinguish one from another entity without necessarily implying a serial or chronological order, unless clearly indicated by the context. The terms "comprises", "comprising", "includes", "including", "contains", "containing" or variations thereof do not specify an exhaustive inclusion, such that by the terms "comprises", "comprising", "includes", "including", "contains", "containing" or variations thereof, it is meant that the methods, processes, systems, articles, compositions or apparatuses contain the specified elements, but not excluding others.

[0036] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0037] This utility model embodiment provides a fastening and disassembly device for a super nut, wherein the super nut can be used in a plunger pump, such as... Figures 1-7 As shown, the plunger pump mentioned here includes a power end assembly 10 and a hydraulic end assembly 20. Due to structural limitations, the hydraulic end assembly 20 is typically mounted on the power end assembly 10 in a cantilever configuration. Therefore, the connector between the hydraulic end assembly 20 and the power end assembly 10 needs to withstand significant torque and possess sufficient strength to support the alternating dynamic loads generated during plunger pump operation and the static loads, including the weight of the hydraulic end assembly 20 itself. For this purpose, a super nut 30 can be used as the connector between the power end assembly 10 and the hydraulic end assembly 20.

[0038] The super nut 30 mentioned in this embodiment can solve the connection strength problem when fixing the hydraulic end assembly 20 to the power end assembly 10, such as Figure 3 As shown, the super nut 30 includes a nut body 31, which is a cylindrical structure with an outer ring 32 and an inner ring 33. Multiple bolts 34 are provided on the outer end face of the nut body 31 and between the outer ring 32 and the inner ring 33. The multiple bolts 34 are evenly spaced on the outer end face of the nut body 31.

[0039] The fastening and disassembly device of this embodiment can fasten and disassemble the super nut 30. Specifically, the fastening and disassembly device is sleeved onto the nut body 31 from the side of the mounting bolt 34 of the super nut 30 to fasten and disassemble the super nut 30. In this embodiment, the fastening and disassembly device has the strength and reliability to achieve fastening, and can also fix the super nut 30 based on a preset preload (here, the preload refers to the torque value applied to the super nut to prevent loosening).

[0040] like Figure 4 As shown, the fastening and disassembly device includes a positioning part 1, a transmission part 3, and at least one support part 2. The transmission part 3 is disposed on one side of the positioning part 1 via the support part 2. A connecting part 4 is provided on the transmission part 3. In this embodiment, the connecting part 4 is used to connect a torque applying device. Here, all or part of the positioning part 1, the support part 2, the transmission part 3, and the connecting part 4 are formed by, for example, welding.

[0041] Further, the positioning part 1 is annular structure, which is used to connect with the outer ring 32 of the nut body 31 to realize the positioning of the super nut 30, in particular, the positioning realized by the positioning part can ensure the entire rotation to be kept concentric during the rotation fastening process of the super nut 30, so that the uniform stress is realized on the outer surface of the nut body 31.

[0042] In particular, the diameter of the inner ring of the positioning part 1 matches the diameter size of the outer ring 32 of the nut body 31, wherein the diameter of the inner ring of the positioning part 1 is greater than the diameter of the outer ring of the nut body 31, so as to facilitate the positioning part 1 to be sleeved on the outer ring 32 of the nut body 31.

[0043] In some embodiments, the positioning part 1 has a predetermined thickness along the connection direction of the super nut 30, in particular, the positioning part 1 has a predetermined thickness along the connection direction here to facilitate the stable sleeving on the outer ring 32 of the nut body 31, wherein the positioning part 1 is provided with a predetermined thickness here to enable the inner ring surface of the positioning part 1 and the outer surface of the nut body 31 to form a stable friction force without causing the positioning part 1 to easily fall off from the nut body 31.

[0044] In the present embodiment, the transmission part 3 is arranged on the positioning part 1 through the support part 2, in particular, the transmission part 3 is arranged on the first side of the positioning part 1, and the second side of the positioning part 1 is mounted between the super nut 30.

[0045] In particular, the transmission part 3 is a cylindrical structure, which is located on the first side of the positioning part 1 and is arranged concentrically with the positioning part 1, the positioning part 1 and the transmission part 3 have a predetermined distance along the connection direction, the outer diameter of the transmission part 3 matches the diameter size of the inner ring of the nut body 31, and the outer diameter of the transmission part 3 is particularly smaller than the diameter of the inner ring of the nut body 31.

[0046] In this way, when the positioning part 1 is sleeved on the outer ring 32 of the nut body 31, the bolt 34 on the nut body 31 can extend into the space between the positioning part 1 and the transmission part 3, so as to realize the partial overlap between the bolt 34 and the transmission part 3 in the connection direction, thereby enabling the stable connection between the fastening and dismounting device and the super nut 30.

[0047] The connecting part 4 is connected to the end of the transmission part 3 away from the positioning part 1, and is used to connect a torque applying device, such as a torque wrench or an intermediate variable sleeve, to meet the fastening connection of different torque wrenches. An operator can connect a torque wrench to the connecting part 4, and rotate the fastening and dismounting device 1 by operating the torque wrench. The transmission part 3 can transmit the torque generated by the torque applying device to the fastening operation of the super nut, and the transmission part 3 is a device mainly bearing torque.

[0048] Further, in order to increase the force between the fastening and dismounting device and the super nut during fastening or dismounting, at least one supporting part 2 is arranged between the transmission part 3 and the positioning part 1, for example, between the outer surface of the transmission part 3 and the inner ring of the positioning part 1.

[0049] The supporting part 3 is preferably a plate structure, which can be inserted between two adjacent bolts 34 of the super nut, so as to abut with the bolts 34 to realize the fastening and dismounting of the super nut by the force between the nut body 31 and the fastening and dismounting device.

[0050] Preferably, the supporting part 2 is a plurality of supporting parts 2, which are arranged based on the center of the transmission part 3, for example, two supporting parts 2 can be arranged radially relative to the center of the transmission part 3. Further preferably, the supporting part 2 is a plurality of supporting parts 2, which are arranged radially outward based on the center of the transmission part 3, and the arrangement of the supporting part 3 matches the arrangement position of the bolt 34 on the nut body 31. It should be noted that the more the number of the supporting part 2, the greater the combined force between the supporting part 2 and the bolt 34, and the more labor-saving the fastening or dismounting of the super nut.

[0051] In an embodiment, a plurality of supporting parts 2 are arranged based on a predetermined included angle along the surface of the transmission part 3. The supporting part 2 can be arranged with different predetermined included angles according to the number and position of the bolt 34 on different nut bodies 31. The predetermined included angle between two adjacent supporting parts 2 can be 60°, 90°, 120°, etc. In this embodiment, for example, three supporting parts 2 are arranged based on an included angle of 120° along the surface of the transmission part 3.

[0052] In the installation and fastening of the nut body 31, the nut body 31 of the super nut can be inserted into the space between the positioning part 1 and the transmission part 3 from the second side of the positioning part 1, the outer ring 32 of the nut body 31 matches the inner ring surface of the positioning part 1, the end surface thereof towards the transmission part 3 can abut the end of the supporting part 2, the supporting part 2 is inserted between two adjacent bolts 34, and then torque is applied through the connecting part 4 to realize the fastening or dismounting of the super nut. The supporting part 2 here is used for the close fit between the super nut and the bolts 34 of the super nut 30 during the rotation of the fastening or dismounting of the super nut, so as to facilitate the rotation of the super nut.

[0053] The embodiment of the utility model can greatly improve the effect of fastening and dismounting of the super nut in production practice, can shorten the periodicity of fastening and dismounting of the super nut, specifically, the traditional manual rotation of the outside small screw is changed into the function of quick tightening and quick dismounting by using special device, the fastening time of the super nut on each liquid end assembly is shortened to one third in actual use. In addition, the cost of the embodiment of the utility model is controllable and simple to manufacture, specifically, the traditional super nut fastening tool is hydraulic equipment, because of the limitation of hydraulic source, replacement of hydraulic oil and difficulty of hydraulic equipment operation, the cost of the hydraulic tool is expensive, the maintenance and replacement cost is extremely expensive, the operability is very low in actual use, the material cost of the embodiment of the utility model is low, and the operability is high. Finally, the embodiment of the utility model can realize the application of specific torque to the super nut, because the connecting part can be externally connected to the reducing joint, therefore the torque applying tool such as torque wrench can be directly connected, the specific quantitative torque pre-tightening anti-loose fixing can be realized, the anti-loose of the super nut is more reliable through the external torque wrench, and the problem that accurate torque fixing cannot be realized is solved.

[0054] In the above embodiment of the utility model, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0055] For purposes of the description hereinafter, the terms "upper", "lower", "right", "left", "rear", "front", "vertical" and "horizontal" as can be perceived herein relative to the accompanying drawings refer to the orientation of the components being described. However, it is to be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device described herein is turned over, and a spatially relative descriptor used herein is then deemed to refer to the reversed orientation of the device. Accordingly, the exemplary term "above" can encompass both an orientation of above and below. Thus, the exemplary term "above" can include both the above and below orientations. The device can also be oriented in other ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0056] In addition, it should be noted that throughout this application descriptions using the terms "one embodiment", "another embodiment", "an embodiment" and / or "some embodiments" has multiple meanings in that any of the described embodiments can be used in combination with any of the other described embodiments.

[0057] In the above embodiments, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0058] The above only describes preferred embodiments of the present application and is not intended to limit the present application. The present application can be variously changed and modified by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fastening and unfastening device for a super nut, characterized in that, The positioning part is annular in structure and is used to connect with the outer ring of the super nut, the transmission part is arranged on one side of the positioning part through the support part, and the connection part is arranged on the transmission part and is used to connect the torque applying device.

2. The fastening and detaching device according to claim 1, characterized in that The positioning part is sleeved on the outer ring of the super nut, and has a predetermined thickness along the connecting direction of the super nut.

3. The fastener detachment device of claim 1, wherein The positioning part and the transmission part have a predetermined distance along the connecting direction of the super nut.

4. The fastener detachment device of claim 1, wherein The transmission part is concentrically arranged with the positioning part, the inner ring of the positioning part has a diameter greater than that of the outer ring of the super nut, and the outer diameter of the transmission part is less than the diameter of the inner ring of the super nut.

5. The fastener detachment device of claim 4, wherein The support part is arranged between the outer surface of the transmission part and the inner ring of the positioning part.

6. The fastener detachment device of claim 5, wherein The support part is plate-shaped in structure and can be inserted between two adjacent connecting pieces on the super nut.

7. The fastener detachment device of claim 5, wherein The support part is a plurality of support parts, and the plurality of support parts are arranged symmetrically based on the center of the transmission part.

8. The fastener detachment device of claim 5, wherein The support part is a plurality of support parts, and the plurality of support parts are arranged radially outward based on the center of the transmission part.

9. The fastener detachment device of claim 8, wherein The plurality of support parts are arranged based on a predetermined included angle along the outer surface of the transmission part.

10. The fastener detachment device of claim 9, wherein The predetermined included angle is one of 60°, 90° and 120°.

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