Centering device for installation of pump stuffing box

Abstract

The utility model relates to the technical field of centering devices, and provides a pump stuffing box installation centering device which comprises a positioning piece arranged on a shaft sleeve; the positioning column is arranged on the positioning piece and provided with an inserting part used for being inserted between the stuffing box and the shaft sleeve. By means of the technical scheme, the technical problems that in the prior art, positioning is not accurate and installation time is long when the stuffing box is installed are solved.

Description

Technical Field

[0001] The embodiments disclosed herein relate to the field of centering device technology, and more specifically, to a pump stuffing box centering device. Background Technology

[0002] Centrifugal pumps, as core equipment for fluid transmission, have a sealing packing device consisting of a stuffing box, stuffing sleeve, stuffing rings, packing, and stuffing gland. The installation quality of the stuffing box directly affects the pump's sealing performance and operational stability. Because the inner diameter of the first through hole is larger than the outer diameter of the bushing, the gap between them is used for material adjustment. During installation, the material adjustment box must be installed on the pump first, and then the material can be adjusted. However, traditional stuffing box installation methods suffer from inaccurate positioning, long installation time, and high operational skill requirements. This not only affects work efficiency but may also lead to seal failure due to excessive coaxiality, causing leaks and other safety hazards. Utility Model Content

[0003] To overcome the above-mentioned defects, embodiments of this disclosure provide a pump stuffing box installation centering device, which solves the problems of inaccurate positioning and long installation time in the prior art when installing stuffing boxes.

[0004] Technical issues.

[0005] According to one aspect, at least one embodiment of this disclosure provides a pump stuffing box mounting centering device for positioning a stuffing box sleeved on a shaft sleeve. The stuffing box has a first through hole, the inner wall of which has an annular boss that abuts against the shaft sleeve. The device includes:

[0006] Positioning element, used to be mounted on the bushing;

[0007] A positioning post is disposed on the positioning member, the positioning post having an insertion part for insertion between the stuffing box and the bushing.

[0008] For example, in a pump stuffing box mounting centering device provided in at least one embodiment of this disclosure, the positioning member has a positioning surface, and the positioning member abuts against the bushing through the positioning surface.

[0009] For example, in a pump stuffing box mounting centering device provided in at least one embodiment of this disclosure, the positioning surface is a cylindrical surface.

[0010] For example, in a pump stuffing box mounting centering device provided in at least one embodiment of this disclosure, the positioning surface may be at least two planes.

[0011] For example, in a pump stuffing box installation centering device provided in at least one embodiment of this disclosure, the insert is cylindrical, and the diameter of the positioning post is equal to the radius difference between the first through hole and the bushing.

[0012] For example, in a pump stuffing box mounting centering device provided in at least one embodiment of this disclosure, the positioning column further has a mounting portion for passing through the positioning member.

[0013] For example, in a pump stuffing box mounting centering device provided in at least one embodiment of this disclosure, the mounting portion has a threaded section and further includes:

[0014] The nut is threaded on the threaded section, and the nut and the insertion part are located on opposite sides of the positioning member.

[0015] The insertion part rotates relative to the mounting part.

[0016] For example, in at least one embodiment of the pump stuffing box mounting centering device provided in this disclosure, the device further includes:

[0017] A push rod is threaded onto the positioning member. The push rod is used to abut against the stuffing box. After the push rod rotates, it is used to drive the positioning member away from the stuffing box, so that the insert is pulled out from between the stuffing box and the bushing.

[0018] For example, in at least one embodiment of this disclosure, a pump stuffing box mounting centering device is provided, wherein both ends of the positioning member have chamfers on the side near the bushing. A pump stuffing box mounting centering device.

[0019] The beneficial effects of the embodiments disclosed herein are as follows:

[0020] In this disclosure, positioning components and positioning pins ensure the alignment accuracy between the stuffing box, pump body, pump shaft, and bushing, thereby improving the pump's sealing performance and operational stability. The automatic adjustment mechanism simplifies the installation process, reduces the complexity and time-consuming nature of manual operation, and improves installation efficiency. Precise installation reduces safety hazards such as leaks caused by seal failure, extends the pump's service life, and lowers maintenance costs. The positioning device of this invention can be customized for different models and specifications of centrifugal pumps, exhibiting strong adaptability. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments of this disclosure will be briefly introduced below. Obviously, the drawings described below are merely some exemplary embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on the content of the exemplary embodiments of this disclosure and these drawings without any creative effort.

[0022] Figure 1 This is a schematic diagram of a pump stuffing box centering device according to one embodiment of the present disclosure;

[0023] Figure 2 for Figure 1 A schematic diagram of the structure of the stuffing box after installation in the embodiment;

[0024] Figure 3 for Figure 1 A side view schematic diagram of a pump stuffing box centering device in one embodiment;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure in which the insert is inserted into the first through hole in an embodiment;

[0026] Figure 5 for Figure 1 The schematic diagram of the positioning column in the embodiment is shown.

[0027] In the figure: 1. Bushing, 2. Stuffing box, 21. First through hole, 22. Annular boss, 3. Positioning element, 4. Positioning pin, 41. Insert, 42. Positioning surface, 43. Mounting part, 5. Nut, 6. Push rod. Detailed Implementation

[0028] The present disclosure will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the scope of the disclosure.

[0029] To keep the drawings concise, each drawing only schematically shows the parts relevant to the disclosure; these do not represent the actual structure of the product. Furthermore, for ease of understanding, in some drawings, only one of components with the same structure or function is schematically shown, or only one is labeled. In this document, "one" not only means "only one," but can also mean "more than one," and "several" includes "two" and "more than two."

[0030] In this document, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0031] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0033] Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] like Figure 1 As shown, a pump stuffing box 2 installation centering device is provided in one embodiment of the present disclosure for positioning the stuffing box 2 sleeved on the bushing 1. The stuffing box 2 has a first through hole 21, and the inner wall of the first through hole 21 has an annular boss 22. The annular boss 22 abuts against the bushing 1. A positioning member 3 is provided on the bushing 1. A positioning post 4 is provided on the positioning member 3. The positioning post 4 has an insertion part 41 for insertion between the stuffing box 2 and the bushing 1.

[0035] For example, such as Figures 1-5 As shown, the specific steps of using the centering device disclosed herein are as follows: The packing sleeve 1 is installed on the pump shaft. The positioning element 3 is placed on the outer wall of the packing sleeve 1, so that the positioning pin 4 is positioned in the installation direction of the stuffing box 2. The stuffing box 2 is then fitted onto the positioning pin 4 in the centering device on the packing sleeve 1, ensuring that the positioning element 3 and the inner wall of the first through hole 21 are tightly fitted. The positioning element 3 is rotated, causing the positioning pin 4 to rotate one revolution along the axis of the sleeve 1. The distance between the inner wall of the first through hole 21 and the sleeve 1 is equidistant. After the stuffing box 2 is installed, the positioning pin 4 is located between the inner wall of the first through hole 21 and the sleeve 1, so the stuffing box 2 is concentrically positioned with the sleeve 1 at this time. This centering device is used to assist in the installation of the stuffing box 2.

[0036] Therefore, this disclosure has the following effects:

[0037] 1. Improve installation accuracy: The positioning parts 3 and 4 ensure the alignment accuracy between the stuffing box 2 and the pump body, pump shaft and shaft sleeve 1, thereby improving the pump's sealing performance and operational stability.

[0038] 2. Improved installation efficiency: The automatic adjustment mechanism simplifies the installation process, reduces the complexity and time consumption of manual operation, and improves installation efficiency.

[0039] 3. Reduced maintenance costs: Precise installation reduces safety hazards such as leaks caused by seal failure, extends the service life of the pump, and reduces maintenance costs.

[0040] 4. High adaptability: The positioning device of the present invention can be customized according to different models and specifications of centrifugal pumps, and has strong adaptability.

[0041] In some examples, the positioning element 3 has a positioning surface 42, through which the positioning element 3 abuts against the bushing 1.

[0042] For example, such as Figures 1-3 As shown, the positioning element 3 is placed on the bushing 1, so that the positioning surface 42 contacts the bushing 1. Due to the design of the positioning surface 42, the positioning element 3 can rotate around the axis of the bushing 1, thereby causing the positioning pin 4 to rotate between the inner wall of the first through hole 21 and the bushing 1, ensuring that the distance between the inner wall of the first through hole 21 and the bushing 1 is equal, thus ensuring that the first through hole 21 and the bushing 1 are concentrically positioned and the stuffing box 2 and the bushing 1 are concentrically positioned.

[0043] In some examples, positioning surface 42 is a cylindrical surface.

[0044] For example, such as Figure 1 As shown, the positioning surface 42 forms a semi-circular mounting hole. When using the positioning element 3, the positioning element 3 is placed directly on the bushing 1, so that the positioning column 4 is arranged along the axis of the bushing 1. The positioning surface 42 of the columnar surface structure is in contact with the outer side of the bushing 1. Since the positioning element 3 has a certain thickness, the positioning element 3 will be directly concentric with the bushing 1 when it is placed on the bushing 1.

[0045] In some examples, positioning surface 42 may be at least two planes.

[0046] For example, such as Figure 1As shown in this disclosure, to ensure structural stability, the positioning pins 4 contact the bushing 1 and the stuffing box 2 respectively. The positioning surface 42 in this disclosure can also be three surfaces forming an open rectangle. The three surfaces of the rectangle fit against the bushing 1. The positioning member 3 has three positioning pins 4. After the positioning member 3 is placed on the bushing 1, the three positioning pins 4 are spaced apart along the circumference of the bushing 1. After the positioning pins 4 are inserted between the stuffing box 2 and the bushing 1, the three positioning pins contact the inner wall of the first through hole 21. Rotating the positioning member 3 causes the positioning pins 4 to drive the first through hole 21 and the bushing 1 to be concentric. The positioning surface 42 can also be two surfaces, both inclined. After the positioning member 3 is placed on the bushing 1, the two surfaces contact the bushing 1 respectively. The positioning member 3 has only two positioning pins 4, which can be inserted simultaneously between the stuffing box 2 and the bushing 1. The insertion part 41 is cylindrical, and the diameter of the positioning pin 4 is equal to the radius difference between the first through hole 21 and the bushing 1.

[0047] For example, such as Figure 1 As shown, in order to ensure the stability of the structure, the insert 41 and the stuffing box 2 are in contact with the bushing 1 to prevent the insert 41 from being unable to support the stuffing box 2 and thus causing the insert 41 to break.

[0048] In some examples, the positioning post 4 also has a mounting portion 43 for mounting onto the positioning member 3. The mounting portion 43 has a threaded section and a nut 5, with the thread disposed on the threaded section. The nut 5 and the insert 41 are located on opposite sides of the positioning member 3.

[0049] For example, such as Figure 1 As shown, the mounting part 43 of the push rod 6 is first inserted onto the positioning member 3, and the nut 5 is threaded onto the threaded section, so that the positioning member 3 is located between the nut 5 and the insert 41. A washer can be installed between the nut 5 and the positioning member 3 to enhance stability. If the insert 41 is worn or damaged, it can be easily replaced. At the same time, when installing the stuffing box 2 with different diameter first through holes 21, the insert 41 of a suitable diameter can be easily replaced to complete the auxiliary installation.

[0050] In some examples, the insertion part 41 rotates relative to the mounting part 43.

[0051] For example, such as Figure 5 As shown, when installing the stuffing box 2, rotate the centering device to make the insert 41 roll in the first through hole 21 between the stuffing bushing 1 and the stuffing box 2, reduce the friction, and make the first through hole 21 and the bushing 1 concentric. At this time, the stuffing box 2 is locked and fixed to the fixed liner.

[0052] In some examples, the push rod 6 is threaded onto the positioning member 3. The push rod 6 is used to abut against the stuffing box 2. After the push rod 6 rotates, it is used to drive the positioning member 3 away from the stuffing box 2, so that the insert 41 is pulled out from between the stuffing box 2 and the bushing 1.

[0053] For example, such as Figure 1 As shown, after the centering device is installed, the stuffing box 2 is installed. After the stuffing box 2 is concentric with the bushing 1, the push rod 6 is rotated. The push rod 6 slowly rotates out of the positioning part 3. After the push rod 6 contacts the stuffing box 2, as the push rod 6 continues to rotate, it drives the positioning part 3 to slide along the bushing 1, so that the positioning part 3 moves away from the stuffing box 2. The insertion part 41 slides out of the first through hole 21, thus realizing the disassembly of the centering device.

[0054] In some examples, the two ends of the positioning element 3 have chamfers on the side near the bushing 1.

[0055] For example, such as Figure 1 As shown, chamfers are provided at both ends of the positioning component 3. During the installation of the positioning plate, the chamfers serve as a guide and allow for easier insertion of the positioning component 3 into the bushing 1. The chamfers make the installation of the positioning component 3 smoother, reducing resistance during installation and improving installation efficiency. Simultaneously, they also prevent damage to the bushing 1 and positioning component 3 caused by friction during installation.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure and are not intended to limit it. Although this disclosure has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this disclosure without departing from the spirit and scope of the technical solutions of this disclosure, and all such modifications and substitutions should be covered within the scope of the claims of this disclosure.

Claims

1. A pump stuffing box mounting centering device for positioning a stuffing box (2) sleeved on a bushing (1), the stuffing box (2) having a first through hole (21), the inner wall of the first through hole (21) having an annular boss (22), the annular boss (22) abutting against the bushing (1), characterized in that, include: Positioning element (3) is used to be mounted on the bushing (1); A positioning post (4) is provided on the positioning member (3). The positioning post (4) has an insertion part (41) for insertion between the stuffing box (2) and the bushing (1).

2. The pump stuffing box centering device according to claim 1, characterized in that, The positioning element (3) has a positioning surface (42), and the positioning element (3) abuts against the bushing (1) through the positioning surface (42).

3. A pump stuffing box installation centering device according to claim 2, characterized in that, The positioning surface (42) is a cylindrical surface.

4. A pump stuffing box installation centering device according to claim 2, characterized in that, The positioning surface (42) may be at least two planes.

5. A pump stuffing box mounting centering device according to claim 1, characterized in that, The insertion part (41) is cylindrical, and the diameter of the positioning post (4) is equal to the radius difference between the first through hole (21) and the bushing (1).

6. A pump stuffing box centering device according to claim 1, characterized in that, The positioning post (4) also has a mounting part (43) for being inserted into the positioning member (3).

7. A pump stuffing box centering device according to claim 6, characterized in that, The mounting portion (43) has a threaded section and further includes: Nut (5), threaded on the threaded section, the nut (5) and the insert (41) are located on both sides of the positioning member (3).

8. A pump stuffing box mounting centering device according to claim 6, characterized in that, The insertion part (41) rotates relative to the mounting part (43).

9. A pump stuffing box mounting centering device according to claim 1, characterized in that, Also includes: The push rod (6) is threaded on the positioning member (3). The push rod (6) is used to abut against the stuffing box (2). After the push rod (6) rotates, it is used to drive the positioning member (3) away from the stuffing box (2), so that the insert (41) is pulled out from between the stuffing box (2) and the bushing (1).

10. A pump stuffing box centering device according to claim 1, characterized in that, The two ends of the positioning member (3) have chamfers on the side near the bushing (1).

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