Disassembling and assembling structure for vertical multi-stage pump opening ring of PDH device

Abstract

The utility model provides a dismounting and mounting structure for a vertical multi-stage pump opening ring of a PDH device, and relates to the technical field of multi-stage pumps. The structure comprises a placing hole, the placing hole is formed in the center of the pump body, and the peripheral side of the wear ring is arranged in the placing hole in a matched mode; the two sets of threaded holes are symmetrically formed in the wear ring and the pump body and located in the connecting position of the wear ring and the pump body, and fastening bolts are installed in the threaded holes. A plurality of dismounting holes are formed in the impeller ring and the pump body in the circumferential direction and located in the connecting position of the impeller ring and the pump body, dismounting bolts are screwed into all the dismounting holes, and the impeller ring is ejected through threads of all the dismounting bolts; the dismounting hole comprises a first half hole, a second half hole and a third half hole, wherein the first half hole is axially formed in the pump body and is a blind hole; the second half-open hole is axially formed in the peripheral side of the wear ring and corresponds to the first half-open hole, and threads are arranged on the inner side wall of the second half-open hole. In the application, the wear ring dismounting mode is simple, the maintenance process is simplified, and the wear ring is effectively prevented from being damaged.

Description

Technical Field

[0001] This utility model relates to the field of multistage pump technology, and in particular to a disassembly and assembly structure for a vertical multistage pump inlet ring in a PDH device. Background Technology

[0002] During normal production, the vertical multistage long-shaft pump of the PDH unit operates continuously. If any abnormality occurs, it needs to be dealt with promptly, which requires timely replacement of the spare pump or timely repair of the abnormal pump. According to the actual situation of the design institute and the factory, there are generally very few spare pumps. The normal operation of the production unit can only be guaranteed by repairing the abnormal pump, which places high demands on the maintenance progress. Generally, maintenance requires disassembling the pump to find the cause. During each pump disassembly process, the pump body inlet ring needs to be removed for inspection or repair. Usually, disassembly can only be done by hammering or force, and after removal, the pump body inlet ring is basically damaged and unusable, which delays the maintenance progress and affects the normal operation of the production unit.

[0003] Therefore, there is an urgent need for a disassembly and assembly structure for the port ring of a vertical multistage pump in a PDH device that is simple to disassemble, simplifies the maintenance process, and effectively avoids damage to the port ring. Utility Model Content

[0004] The purpose of this invention is to provide a disassembly and assembly structure for the inlet ring of a vertical multistage pump in a PDH device, solving the problem in the prior art where the disassembly process is too forceful, easily damaging the inlet ring and affecting production technology. The various technical effects of the preferred technical solution among the many technical solutions provided by this invention are detailed below.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] This utility model provides a disassembly and assembly structure for a vertical multistage pump inlet ring in a PDH device, comprising:

[0007] A placement hole is provided, which is located at the center of the pump body, and the periphery of the mouth ring is adapted to fit into the placement hole.

[0008] Two sets of threaded holes are symmetrically opened on the mouth ring and the pump body, and are located at the connection between the mouth ring and the pump body. Fastening bolts are installed in the threaded holes.

[0009] Disassembly holes are provided, with a plurality of such disassembly holes being circumferentially formed on the mouth ring and the pump body and located at the connection between the mouth ring and the pump body. Disassembly bolts are screwed into all of the disassembly holes, and the mouth ring is pushed out through the threads of all of the disassembly bolts.

[0010] The disassembly hole includes:

[0011] The first half-opening is axially formed on the pump body and is configured as a blind hole.

[0012] The second half-opening is axially formed on the outer periphery of the mouth ring and is corresponding to the first half-opening. The inner wall of the second half-opening is provided with threads.

[0013] Preferred options also include:

[0014] A support platform is disposed within the placement hole, and the mouth ring is in contact with the end face of the support platform.

[0015] Preferably, the support platform is an annular support platform, the inner diameter of the support platform is smaller than the inner diameter of the mouth ring, and the disassembly hole is located on the side of the support platform closer to the mouth ring.

[0016] Preferably, the bottom of the first semi-opening is connected to the end face of the support platform.

[0017] Preferably, the cross-section of the mouth ring is set as an isosceles trapezoid, the outer periphery of the mouth ring is the short side of the isosceles trapezoid, and the inner periphery of the mouth ring is the long side of the isosceles trapezoid.

[0018] Preferably, the included angle between circumferentially adjacent disassembly holes is no greater than 120°.

[0019] Preferably, the disassembly hole and the threaded hole are the same size.

[0020] In the technical solution provided by this utility model, under normal conditions, the mouth ring is fitted into the placement hole, and the mouth ring is confined within the placement hole by screwing in fastening bolts into two sets of threaded holes. When maintenance is required, the fastening bolts in the two sets of threaded holes are removed. Due to prolonged operation in a water environment, the mouth ring may become stuck in the placement hole due to scale or impurities. The disassembly bolts are then screwed into all the disassembly holes, thereby pushing the mouth ring out through the reverse thread. In this application, the method of disassembling the mouth ring is simple, simplifying the maintenance process and effectively avoiding damage to the mouth ring. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a top view schematic diagram of the entire utility model;

[0023] Figure 2This is a schematic cross-sectional view of the disassembly hole of this utility model from the main view direction.

[0024] In the diagram: 1. Pump body; 2. Placement hole; 3. Support platform; 4. Inlet ring; 5. First half-opening; 6. Second half-opening; 7. Disassembly hole; 8. Threaded hole; 9. Wear-prone area. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0026] refer to Figure 1-2 A specific embodiment of this utility model provides a disassembly and assembly structure for a vertical multistage pump inlet ring in a PDH device, comprising:

[0027] Placement hole 2 is opened in the center of pump body 1, and the periphery of mouth ring 4 is adapted to fit in placement hole 2;

[0028] Threaded holes 8, two sets of threaded holes 8 are symmetrically opened on the mouth ring 4 and the pump body 1, and are located at the connection between the mouth ring 4 and the pump body 1. Fastening bolts are installed in the threaded holes 8.

[0029] Disassembly holes 7 are provided. Several disassembly holes 7 are circumferentially opened on the inlet ring 4 and the pump body 1, and are located at the connection between the inlet ring 4 and the pump body 1. Disassembly bolts are screwed into all disassembly holes 7 and exit the outlet ring 4 through the threads of all disassembly bolts.

[0030] During normal production, the vertical multistage long-shaft pump of the PDH unit operates continuously. If any abnormality occurs, it needs to be resolved promptly, requiring timely replacement of the backup pump or timely repair of the malfunctioning pump. According to the design institute and factory's actual situation, backup pumps are generally scarce; the normal operation of the production unit is ensured only by repairing the malfunctioning pump, which places high demands on the maintenance schedule. Generally, maintenance requires disassembling the pump to find the cause. During each disassembly, the pump body's outlet ring needs to be removed for inspection or repair. Usually, removal can only be done by hammering or force, and after removal, the outlet ring is usually damaged and unusable, delaying the maintenance progress and affecting the normal operation of the production unit. In this application, under normal conditions, the outlet ring 4 is fitted into the placement hole 2, and the outlet ring 4 is confined within the placement hole 2 by tightening fastening bolts in the two sets of threaded holes 8. When maintenance is required, the fastening bolts in the two sets of threaded holes 8 are removed. Due to prolonged operation in a water environment, the outlet ring 4 may become stuck in the placement hole 2 due to scale or impurities. The disassembly bolts are then screwed into all the disassembly holes 7, thereby pushing the outlet ring 4 outward through the reverse thread. In this application, the method of disassembling the mouth ring 4 is simple, which simplifies the maintenance process and effectively avoids damage to the mouth ring 4.

[0031] The design has been further optimized, and disassembly hole 7 includes:

[0032] The first half-opening 5 is axially opened on the pump body 1, and the first half-opening 5 is set as a blind hole.

[0033] The second half-opening 6 is axially opened on the outer periphery of the mouth ring 4 and is corresponding to the first half-opening 5. The inner wall of the second half-opening 6 is provided with threads.

[0034] When it is necessary to overhaul the vertical multistage long shaft pump of the PDH unit, the bolt is screwed into the disassembly hole 7 through the thread provided on the inner side wall of the second half-opening hole 6. When the disassembly bolt contacts the bottom of the disassembly hole 7 and cannot be screwed in any further, the disassembly bolt is rotated. The disassembly bolt and the thread on the second half-opening hole 6 continuously push the mouth ring 4 out of the placement hole 2.

[0035] Further optimizations to the plan include:

[0036] Support platform 3 is set inside placement hole 2, and mouth ring 4 is set to contact the end face of support platform 3.

[0037] By setting up the support platform 3, it is easy to position the mouth ring 4 during installation, and then the mouth ring 4 is fixed to the pump body 1 by fastening bolts.

[0038] Further optimization of the design: the support platform 3 is a ring support platform, the inner diameter of the support platform 3 is smaller than the inner diameter of the mouth ring 4, and the disassembly hole 7 is located on the side of the support platform 3 close to the mouth ring 4.

[0039] This configuration ensures that the support platform 3 can fully support the inlet ring 4, and a good sealing effect is formed between the pump body 1 and the inlet ring 4.

[0040] The design was further optimized so that the bottom of the first semi-opening 5 is connected to the end face of the support platform 3.

[0041] The depth of the first half-opening 5 extends to the support platform 3. When the disassembly bolt contacts the support platform 3, the disassembly bolt continues to rotate and passes through the threaded top outlet ring 4 in the second half-opening 6.

[0042] Further optimization of the design: the cross-section of the mouth ring 4 is set as an isosceles trapezoid, with the outer periphery of the mouth ring 4 being the short side of the isosceles trapezoid and the inner periphery of the mouth ring 4 being the long side of the isosceles trapezoid.

[0043] The design was further optimized so that the included angle between adjacent disassembly holes 7 in the circumferential direction is no greater than 120°.

[0044] The disassembly holes 7 in this application are set in three groups and are set at equal angles. The included angle between adjacent disassembly holes 7 is 120°. When disassembling the mouth ring 4, it is necessary to operate the three groups of disassembly bolts simultaneously and screw them into the disassembly holes 7.

[0045] The design was further optimized so that the dimensions of disassembly hole 7 and threaded hole 8 are the same.

[0046] With this setup, fastening bolts and disassembly bolts of the same size can be simultaneously screwed into disassembly hole 7 to disassemble mouth ring 4.

[0047] The wear zone 9 is located on the end face of the mouth ring 4 away from the support platform 3; by judging the condition of the wear zone 9, the operating condition of the vertical multistage long shaft pump of the PDH device can be judged.

[0048] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., used herein to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the equipment or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In this description, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A disassembly and assembly structure for a vertical multistage pump inlet ring in a PDH device, characterized in that, include: Placement hole (2), the placement hole (2) is opened in the center of the pump body (1), and the periphery of the mouth ring (4) is adapted to the placement hole (2); Threaded holes (8), two sets of threaded holes (8) are symmetrically opened on the mouth ring (4) and the pump body (1), and are located at the connection between the mouth ring (4) and the pump body (1). Fastening bolts are installed in the threaded holes (8); Disassembly holes (7) are provided. Several disassembly holes (7) are provided circumferentially on the mouth ring (4) and the pump body (1) and are located at the connection between the mouth ring (4) and the pump body (1). Disassembly bolts are screwed into all the disassembly holes (7) and the mouth ring (4) is pushed out by the threads of all the disassembly bolts. The disassembly hole (7) includes: The first half-opening (5) is axially opened on the pump body (1) and is configured as a blind hole. The second half-opening (6) is axially opened on the outer periphery of the mouth ring (4) and is corresponding to the first half-opening (5). The inner wall of the second half-opening (6) is provided with threads.

2. The disassembly and assembly structure for the vertical multistage pump inlet ring of a PDH device according to claim 1, characterized in that, Also includes: A support platform (3) is disposed inside the placement hole (2), and the mouth ring (4) is disposed in contact with the end face of the support platform (3).

3. The disassembly and assembly structure for the vertical multi-stage pump inlet ring of a PDH device according to claim 2, characterized in that, The support platform (3) is an annular support platform. The inner diameter of the support platform (3) is smaller than the inner diameter of the mouth ring (4). The disassembly hole (7) is located on the side of the support platform (3) close to the mouth ring (4).

4. The disassembly and assembly structure for the vertical multistage pump inlet ring of a PDH device according to claim 2, characterized in that, The bottom of the first semi-open hole (5) is connected to the end face of the support platform (3).

5. The disassembly and assembly structure for the vertical multistage pump inlet ring of a PDH device according to claim 2, characterized in that, The cross-section of the mouth ring (4) is set as an isosceles trapezoid, the outer periphery of the mouth ring (4) is the short side of the isosceles trapezoid, and the inner periphery of the mouth ring (4) is the long side of the isosceles trapezoid.

6. The disassembly and assembly structure for the vertical multistage pump inlet ring of a PDH device according to claim 2, characterized in that, The included angle between adjacent circumferential disassembly holes (7) is no greater than 120°.

7. The disassembly and assembly structure for the vertical multistage pump inlet ring of a PDH device according to claim 1, characterized in that, The disassembly hole (7) is the same size as the threaded hole (8).

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