A bcl end cap pressure testing fastening device

Abstract

This invention relates to the field of compressors. The invention discloses a BCL end cap pressure testing and tightening device, comprising: a mandrel, the mandrel having a first end and a second end, the mandrel penetrating the end cap, the first end located on one side of the end cap, and the second end located on the other side of the end cap; an anti-rotation nut, the anti-rotation nut disposed at the first end of the mandrel, and a tightening nut adapted to connect with a wrench; a tightening nut, the tightening nut disposed at the second end of the mandrel; and a base, the base being connected to a fixing carrier, the anti-rotation nut being disposed on the base. This invention allows for the application of force to the tightening nut using a wrench or electric wrench, thereby tightening both the anti-rotation nut and the tightening nut, saving time and effort. When using an electric wrench, the tightening force applied to the tightening nut can be set to prevent insufficient tightening force from causing unsuccessful pressure testing.

Description

Technical Field

[0001] This invention relates to the field of compressors, and in particular to a BCL end cap pressure testing and fastening device. Background Technology

[0002] After the compressor end cover is processed, a water pressure test is required. During the water pressure test, all openings of the end cover need to be closed to form a closed cavity. Water is injected into the cavity according to the set pressure value and the pressure is maintained for 30 minutes. If there is no leakage between the water pressure test fixture and the end cover, the water pressure test is considered qualified.

[0003] During pressure testing of existing BCL end caps, the mandrel typically features a first sealing structure and a second sealing structure. The first sealing structure is located at the lower port of the end cap and is secured to it with an M110 nut. The second sealing structure is located at the upper port of the end cap and is also secured to it with an M110 nut. This creates a sealed cavity for pressure testing. However, M110 nuts are usually quite heavy. Tightening them typically involves welding a handle to the nut and striking it with a sledgehammer. This method is not only physically demanding but also relies heavily on the operator's experience, often resulting in insufficient tightening force and unsuccessful pressure testing. Summary of the Invention

[0004] In view of this, in order to solve the problem of tightening M110 nuts, the present invention provides a BCL end cap pressure testing and tightening device.

[0005] Specifically, the following technical solutions are included:

[0006] A BCL end cap pressure testing and fastening device, comprising:

[0007] A mandrel, comprising a first end and a second end, the mandrel passing through an end cap, the first end being located on one side of the end cap and the second end being located on the other side of the end cap;

[0008] An anti-rotation nut is provided at the first end of the mandrel, and the tightening nut is adapted to be connected to a wrench;

[0009] Tighten the nut, which is located at the second end of the mandrel;

[0010] A base is connected to a fixed carrier, and an anti-rotation nut is disposed on the base.

[0011] Preferably, the base includes a base plate;

[0012] The base plate is provided with an anti-rotation hole, the shape of which matches the shape of the anti-tipping nut, and the anti-tipping nut and the anti-rotation hole are engaged.

[0013] Preferably, the base includes a base plate, an anti-rotation plate, and an anti-rotation rod;

[0014] The anti-rotation plate is disposed on the base plate, and multiple anti-rotation plates are disposed. The multiple anti-rotation plates are evenly arranged circumferentially along the axis of the spindle, and there is an anti-rotation groove between two adjacent anti-rotation plates disposed circumferentially along the axis of the spindle.

[0015] The anti-rotation nut is located in the clamping space formed by the plurality of anti-rotation plates, the anti-rotation rod and the anti-rotation nut are inserted together, and the anti-rotation rod is located in the anti-rotation groove.

[0016] Preferably, the anti-rotation plate is a fan-shaped plate;

[0017] The inner arc surfaces of multiple anti-rotation plates are located on the same circumference, making the clamping space cylindrical;

[0018] The diameter of the clamping space is equal to the maximum outer diameter of the anti-tipping nut.

[0019] Preferably, the anti-rotation nut is provided with a socket, and one end of the anti-rotation rod is inserted into the socket;

[0020] Multiple sockets are provided, and each socket corresponds to one anti-rotation rod.

[0021] Preferably, the base plate is provided with anti-rotation holes;

[0022] The anti-rotation plate is disposed at the edge of the anti-rotation hole, and a portion of the anti-rotation nut is located inside the anti-rotation hole.

[0023] Preferably, the base includes a first fastener;

[0024] The base plate is provided with a first fastening hole, which is a strip-shaped hole, and the base plate and the fixing carrier are connected by the first fastener.

[0025] Preferably, the tightening nut includes a first nut and a second nut;

[0026] The first nut is connected to the mandrel, and the second nut is disposed on the first nut. The second nut is disposed on the side of the first nut away from the mandrel, and the second nut is adapted to be connected to a wrench.

[0027] Preferably, the first nut and the second nut are welded together.

[0028] Preferably, the first nut is provided with a connecting post, and the second nut is screwed to the connecting post;

[0029] The end face of the connecting column is provided with a lifting hole.

[0030] The beneficial effects of the technical solution provided by this invention include at least the following:

[0031] This invention applies force to the tightening nut using a wrench or electric wrench, which can tighten both the anti-rotation nut and the tightening nut, saving time and effort. When using an electric wrench, the tightening force applied to the tightening nut can also be set to prevent insufficient tightening force from causing the pressure test to fail. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the installation structure of the end cap pressure testing and fastening device according to an embodiment of the present invention;

[0034] Figure 2 This is a side view of the base structure according to an embodiment of the present invention;

[0035] Figure 3 This is a top view of the base structure according to an embodiment of the present invention;

[0036] Figure 4 This is a schematic cross-sectional view of an anti-rotation nut according to an embodiment of the present invention;

[0037] Figure 5 This is a side view of a tightening nut according to an embodiment of the present invention;

[0038] Figure 6 This is a top view of a screw-on nut according to an embodiment of the present invention.

[0039] The reference numerals in the figure are respectively:

[0040] 100-End cap 100; 1-Base; 11-Base plate; 12-Anti-rotation plate; 13-Anti-rotation groove; 14-First fastening hole; 15-Base lifting hole; 16-Anti-rotation hole; 2-Anti-rotation nut; 21-Insertion hole; 3-Washer; 4-Tightening nut; 41-First nut; 42-Second nut; 43-First screw hole; 44-Lifting hole; 45-Disassembly hole; 5-First fastener; 6-Mandrel; 7-Anti-rotation rod.

[0041] The foregoing accompanying drawings illustrate a specific embodiment of the invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Before providing a further detailed description of the embodiments of the present invention, the directional terms used in the embodiments of the present invention, such as "upper part," "lower part," and "side part," are used to refer to... Figure 1 The orientation shown is a reference and does not limit the scope of protection of this invention.

[0044] To make the technical solutions and advantages of the present invention clearer, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0045] like Figure 1 As shown, a BCL end cap 100 pressure testing and fastening device includes: a mandrel 6, which has a first end and a second end, and the mandrel 6 passes through the end cap 100. The first end is located on one side of the end cap 100, and the second end is located on the other side of the end cap 100; an anti-rotation nut 2, which is disposed at the first end of the mandrel 6; a tightening nut 4, which is disposed at the second end of the mandrel 6 and is adapted to be connected to a wrench; and a base 1, which is connected to a fixed carrier, and the anti-rotation nut 2 is disposed on the base 1.

[0046] Furthermore, such as Figure 1 As shown, the first end of the mandrel 6 is the lower end of the mandrel 6, and the second end of the mandrel 6 is the upper end of the mandrel 6. Typically, the mandrel 6 also has a first sealing structure and a second sealing structure. The first sealing structure is located at the lower port of the end cover 100 and is secured to the lower port of the end cover 100 by an anti-rotation nut 2. The second sealing structure is located at the upper port of the end cover 100 and is secured to the upper port of the end cover 100 by tightening a nut 4. Thus, the end cover 100 has a sealed cavity that can be pressure tested.

[0047] Furthermore, in this embodiment, the fixed carrier is a workshop floor rail, and the base 1 is connected to the fixed carrier. The anti-rotation nut 2 is set on the base 1, and the base 1 prevents the anti-rotation nut 2 from rotating. In this example, the end cap 100 is placed horizontally, and the base 1 bears the overall weight of the end cap 100. By applying force to the tightening nut 4 with a wrench or electric wrench, the anti-rotation nut 2 and the tightening nut 4 can be tightened, saving time and effort. When using an electric wrench, the tightening force applied to the tightening nut 4 can also be set to prevent insufficient tightening force from causing the pressure test to fail.

[0048] Preferably, the base 1 includes a base plate 11; the base plate 11 is provided with an anti-rotation hole 16, the shape of the anti-rotation hole 16 matches the shape of the anti-tipping nut, and the anti-tipping nut and the anti-rotation hole 16 are engaged.

[0049] Furthermore, in one embodiment, the base plate 11 has an anti-rotation hole 16 in the middle, and the anti-rotation nut 2 is a hexagonal nut. Therefore, the anti-rotation hole 16 is a hexagonal hole, and the anti-rotation nut 2 is engaged in the anti-rotation hole 16.

[0050] Preferably, the base 1 includes a base plate 11, an anti-rotation plate 12, and an anti-rotation rod 7; the anti-rotation plate 12 is disposed on the base plate 11, and multiple anti-rotation plates 12 are disposed, and the multiple anti-rotation plates 12 are evenly arranged circumferentially along the axis of the spindle 6, and there is an anti-rotation groove 13 between two adjacent anti-rotation plates 12 disposed circumferentially along the axis of the spindle 6; the anti-rotation nut 2 is located in the clamping space formed by the multiple anti-rotation plates 12, and the anti-rotation rod 7 and the anti-rotation nut 2 are inserted into each other, and the anti-rotation rod 7 is located in the anti-rotation groove 13.

[0051] Furthermore, such as Figure 2 and Figure 3 As shown, in this embodiment, four anti-rotation plates 12 are provided, corresponding to four anti-rotation grooves 13. After the anti-rotation rod 7 and the anti-rotation nut 2 are inserted, the anti-rotation plates 12 limit the circumferential rotation of the anti-rotation rod 7 along the axis of the spindle 6. It can be understood that the inner wall of the anti-rotation plate 12 abuts against the outer peripheral wall of the anti-rotation nut 2, and the clamping space between the multiple anti-rotation plates 12 limits the upward, downward, leftward, and rightward movement of the anti-rotation nut 2. It can be understood that the inner wall of the anti-rotation plate 12 is the vertical wall surface of the anti-rotation plate 12 close to the axis of the spindle 6, and the outer peripheral wall of the anti-rotation nut 2 is the vertical wall surface of the anti-rotation nut 2 away from the axis of the spindle 6.

[0052] Preferably, the anti-rotation plate 12 is a fan-shaped plate; the inner arc surfaces of multiple anti-rotation plates 12 are located on the same circumference, making the clamping space cylindrical; the diameter of the clamping space is equal to the maximum outer diameter of the anti-tipping nut.

[0053] Furthermore, such as Figure 3As shown, the anti-rotation plate 12 includes an inner arc surface, an outer arc surface, and a side surface. The inner arc surface is located close to the spindle 6, and the outer arc surface is located away from the spindle 6. The side surface connects the outer arc surface and the inner arc surface, and there are two side surfaces, which are vertical planes. The centers of the circles containing the inner and outer arc surfaces are both located on the axis of the spindle 6. In this embodiment, the anti-rotation nut 2 is an M110 nut, and the maximum outer diameter of the anti-rotation nut 2 is 202mm. Therefore, the diameter of the same circumference on which the inner arc surfaces of multiple anti-rotation plates 12 are located is 202mm. It can be understood that when the anti-rotation nut 2 rotates circumferentially around its own axis, the trajectory of the outer extension of the anti-rotation nut 2 is circular, and the maximum outer diameter of the anti-rotation nut 2 is the diameter of this circle.

[0054] Furthermore, such as Figure 3 As shown, the width of the anti-rotation groove 13 is equal to the diameter of the anti-rotation rod 7. It can be understood that the width of the anti-rotation groove 13 is the vertical distance between two anti-rotation plates 12 that are circumferentially adjacent along the axis of the spindle 6.

[0055] Furthermore, such as Figure 3 As shown, the base plate 11 is provided with a base mounting hole 15.

[0056] Preferably, the anti-rotation nut 2 is provided with a socket 21, and one end of the anti-rotation rod 7 is inserted into the socket 21; multiple sockets 21 are provided, and the sockets 21 and the anti-rotation rod 7 are provided in a one-to-one correspondence.

[0057] Furthermore, such as Figure 4 As shown, the hole in the middle of the anti-rotation nut 2 matches the spindle 6, the axis of the insertion hole 21 is perpendicular to the axis of the spindle 6, the anti-rotation rod 7 passes through the anti-rotation groove 13, and one end of the anti-rotation rod 7 is inserted into the insertion hole 21.

[0058] Preferably, the base plate 11 is provided with an anti-rotation hole 16; the anti-rotation plate 12 is provided at the edge of the anti-rotation hole 16, and a part of the anti-rotation nut 2 is located inside the anti-rotation hole 16.

[0059] Furthermore, such as Figure 1 and Figure 3 As shown, the diameter of the anti-rotation hole 16 is 202mm, and the inner arc surface of the anti-rotation plate 12 and the peripheral sidewall of the anti-rotation hole 16 are located on the same circumference. The insertion hole 21 on the anti-rotation nut 2 is located at the upper part of the anti-rotation hole 16, which facilitates the installation of the anti-rotation rod 7.

[0060] Preferably, the base includes a first fastener 5; the base plate 11 is provided with a first fastening hole 14, the first fastening hole 14 is a strip hole, and the base plate 11 and the fixing carrier are connected by the first fastener 5.

[0061] Furthermore, such as Figure 1 and Figure 3 As shown, the first fastening hole 14 is a strip hole, and the first fastener 5 is a T-bolt.

[0062] Preferably, the tightening nut 4 includes a first nut 41 and a second nut 42; the first nut 41 is connected to the spindle 6, the second nut 42 is disposed on the first nut 41, the second nut 42 is disposed on the side of the first nut 41 away from the spindle 6, and the second nut 42 is adapted to be connected to a wrench.

[0063] Furthermore, such as Figure 1 , Figure 5 and Figure 6 As shown, the tightening nut 4 is located at the upper end of the mandrel 6. The first threaded hole 43 of the first nut 41 is screwed into the upper end of the mandrel 6. The first nut 41 is an M110 nut. Figure 1 As shown, the second nut 42 is located above the first nut 41. In one embodiment, the tightening nut 4 is a machined part, and the first nut 41 and the second nut 42 are formed in one operation. In another embodiment, the first nut 41 and the second nut 42 are welded together. The second nut 42 can be rotated using a wrench or electric wrench to achieve the effect of tightening the first nut 41 and the anti-rotation nut 2.

[0064] Preferably, in another embodiment, the first nut 41 is provided with a connecting post, and the second nut 42 is screwed to the connecting post; the end face of the connecting post is provided with a lifting hole 44.

[0065] Furthermore, in another embodiment, the connecting post on the first nut 41 is disposed opposite to the first threaded hole 43, the first connecting post extends away from the first threaded hole 43, and the first connecting post has external threads. The second nut 42 is screwed to the connecting post. In addition, a lifting hole 44 may be provided on the connecting post for facilitating the lifting of the tightened nut 4.

[0066] Furthermore, such as Figure 5 As shown, the first nut 41 has a disassembly hole 45 on its side wall. When manually disassembling the tightened nut 4, a rotating rod can be inserted into the disassembly hole 45, which is convenient for workers to operate and saves time and effort.

[0067] Furthermore, such as Figure 1 As shown, a washer 3 can be set on the spindle 6. The washer 3 is set on the upper part of the anti-rotation nut 2 and is located between the first sealing structure and the anti-rotation nut 2.

[0068] In this invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "a plurality" refers to two or more unless otherwise expressly defined.

[0069] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only.

[0070] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A BCL end cap pressure test fastening device, characterized by, It comprises: a mandrel comprising a first end and a second end, the mandrel penetrating through an end cover, the first end being located on one side of the end cover, and the second end being located on the other side of the end cover; an anti-rotation nut arranged at the first end of the mandrel; a tightening nut arranged at the second end of the mandrel, the tightening nut being adapted to be connected with a wrench; a base connected with a fixed carrier, the anti-rotation nut being arranged on the base; the base comprising a base plate, an anti-rotation plate and an anti-rotation rod; the anti-rotation plate being arranged on the base plate, a plurality of anti-rotation plates being arranged uniformly along the axis of the mandrel, and an anti-rotation groove being formed between two adjacent anti-rotation plates along the axis of the mandrel; the anti-rotation nut being located in the clamping space formed by the plurality of anti-rotation plates, the anti-rotation rod being inserted into the anti-rotation nut, and the anti-rotation rod being located in the anti-rotation groove; the base comprising a first fastener; a first fastening hole being arranged on the base plate, the first fastening hole being a strip-shaped hole, and the base plate and the fixed carrier being connected through the first fastener.

2. The BCL end cover pressure testing fastening device according to claim 1, wherein the base comprises a base plate; an anti-rotation hole being arranged on the base plate, the shape of the anti-rotation hole being matched with the outer shape of the anti-rotation nut, and the anti-rotation nut being clamped with the anti-rotation hole.

3. The BCL end cover pressure testing fastening device according to claim 1, wherein the anti-rotation plate is a sector plate; the inner arc surfaces of the plurality of anti-rotation plates are located on the same circumference, so that the clamping space is cylindrical; the diameter of the clamping space is equal to the maximum outer diameter of the anti-rotation nut.

4. The BCL end cover pressure testing fastening device according to claim 1, wherein an insertion hole is arranged on the anti-rotation nut, and one end of the anti-rotation rod is inserted into the insertion hole; a plurality of insertion holes are arranged, and the insertion holes and the anti-rotation rods are arranged one by one.

5. The BCL end cover pressure testing fastening device according to claim 1, wherein an anti-rotation hole is arranged on the base plate; the anti-rotation plate is arranged at the edge of the anti-rotation hole, and a part of the anti-rotation nut is located in the anti-rotation hole.

6. The BCL end cover pressure testing fastening device according to claim 1, wherein the tightening nut comprises a first nut and a second nut; the first nut is connected with the mandrel, the second nut is arranged on the first nut, the second nut is arranged on the side of the first nut away from the mandrel, and the second nut is adapted to be connected with a wrench.

7. The BCL end cover pressure testing fastening device according to claim 6, wherein the first nut and the second nut are welded.

8. The BCL end cover pressure testing fastening device according to claim 6, wherein a connecting column is arranged on the first nut, the second nut is screwed with the connecting column, and a lifting hole is arranged on the end surface of the connecting column. ​

Images