Easily-connected flange for marine seawater lift pump

Abstract

The utility model discloses an easy-to-connect flange for a marine seawater lift pump, which relates to the field of easy-to-connect flanges and comprises a seawater lift pump, an annular positioning groove is arranged on the outer wall of an inlet end at the top of the seawater lift pump, and the easy-to-connect flange is sleeved at the inlet end at the top of the seawater lift pump. And an annular mounting groove is formed in the top of the easy-to-connect flange, a clamping ring is clamped in the annular positioning groove, and the bottom of the clamping ring is erected between the bottom wall of the annular positioning groove and the bottom wall of the annular mounting groove. The detachable flange installation structure is adopted, the easy-to-connect flange can be independently machined conveniently, the precision requirement is common and can be achieved through a common lathe, the situation that an existing fixed flange is directly poured on a centrifugal pump seawater lift pump, and in order to meet the requirements of various standard flanges, various molds of different sizes need to be manufactured is avoided, and the production cost is reduced. And the cost is high.

Description

Technical Field

[0001] The utility model relates to the field of easy - connection flanges, and particularly to an easy - connection flange for a marine seawater lift pump. Background Technique

[0002] A marine seawater lift pump is a mechanical device with high versatility and is an essential guarantee equipment for the normal use of platforms such as ships. Its wide application provides various water supplies for ships, platforms, etc., and is the guarantee for the normal operation of the fire - fighting system, ballast system, bilge drainage system, domestic water supply system, seawater desalination system, and cargo liquid system of ships.

[0003] These systems generally use a marine seawater lift pump as the working machine and a hose as the device for extracting and transporting the medium. Usually, a flange connection is adopted between the hose and the seawater lift pump. To improve the degree of generalization, the connection flanges are highly standardized, including national standards (such as Chinese standards, American standards, Japanese standards, etc.), industry standards (such as ship industry standards, mechanical industry standards, etc.), and enterprise standards (standards formulated by each enterprise). As long as a unified standard is established during ship design, the external interfaces of all ship equipment can be made completely consistent, which brings convenience to design, procurement, and assembly.

[0004] Implementing standardization is the only way for the development from sporadic production to mass production. The drawback is that due to the implementation of too many standards, there are numerous forms and sizes of the external - interface flanges of marine seawater lift pumps, resulting in increased costs for enterprises in terms of molds, materials, manufacturing, and management. Content of the Utility Model

[0005] Based on this, the purpose of the utility model is to provide an easy - connection flange for a marine seawater lift pump to solve the technical problems mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An easy - connection flange for a marine seawater lift pump, including a seawater lift pump. An annular positioning groove is opened on the outer wall of the inlet end at the top of the seawater lift pump. An easy - connection flange is sleeved on the inlet end at the top of the seawater lift pump, and an annular installation groove is opened at the top of the easy - connection flange. A clamping ring is clamped inside the annular positioning groove, and the bottom of the clamping ring is placed between the bottom wall of the annular positioning groove and the bottom wall of the annular installation groove. A sealing ring is installed at the top of the annular installation groove, and the inner wall of the sealing ring is fitted with the outer wall of the top of the seawater lift pump. The outer wall of the sealing ring is placed on the top of the easy - connection flange.

[0007] By adopting the above technical solution, when the easy-connect flange is in use, directly put the easy-connect flange on the inlet at the upper end of the seawater lift pump. First, use a pair of needle-nose pliers to clamp the two gaps on both sides of the clamping ring and forcefully expand it to fall into the annular positioning groove at the inlet part of the seawater lift pump. At this time, the bottom of the clamping ring limits the easy-connect flange, thus completing the assembly of the easy-connect flange. When disassembling, insert the pointed part of the needle-nose pliers into the through hole at one end of the clamping ring and pull the needle-nose pliers to expand the clamping ring, so that the clamping ring can be taken out from the annular positioning groove of the seawater lift pump inlet, and then the easy-connect flange can be removed. The detachable flange installation structure is convenient for the separate processing of the easy-connect flange, and the precision requirement is generally low, which can be achieved by an ordinary lathe. After processing, it can be directly sleeved on the inlets and outlets of marine seawater lift pumps. With the clamping ring for limit, if it is necessary to replace other standard flanges, just loosen the clamping ring, and the easy-disassembling flange can be removed and replaced, avoiding the problems of high cost caused by the need to manufacture a variety of different-sized molds to meet the requirements of various standardized flanges when the existing fixed flanges are directly cast on the centrifugal pump seawater lift pump.

[0008] The present utility model is further arranged such that a positioning ring is fixedly connected to the surface of the upper end of the seawater lift pump, and the bottom of the easy-connect flange is placed on the surface of the top of the positioning ring.

[0009] By adopting the above technical solution, when the easy-connect flange is sleeved on the inlet end at the top of the seawater lift pump, the bottom of the easy-connect flange plays a supporting role through the positioning ring. When the clamping ring limits the top of the easy-connect flange, the stability of the installation of the easy-connect flange can be improved.

[0010] The present utility model is further arranged such that the cross-sectional width of the annular installation groove is twice the cross-sectional width of the clamping ring.

[0011] By adopting the above technical solution, since the cross-sectional width of the annular installation groove is greater than the cross-sectional width of the clamping ring, there is no interference during the expansion of the clamping ring by the needle-nose pliers, which is convenient for the clamping ring to be taken off from the annular positioning groove.

[0012] The present utility model is further arranged such that one side of the clamping ring has a gap, and the clamping ring is made of manganese alloy.

[0013] By adopting the above technical solution, through the setting of the gap on one side of the clamping ring, it is convenient to expand the clamping ring by the needle-nose pliers, which is convenient for the clamping ring to be sleeved in the annular positioning groove. And it is made of manganese alloy, with good reset ability and can be used multiple times.

[0014] The present utility model is further arranged such that a through hole is opened on one side of the clamping ring, and the inner wall of the through hole has an anti-slip groove.

[0015] By adopting the above technical solution, when one end of the snap ring is opened by the pliers, the teeth at the tip of the pliers will be stuck in the anti-slip grooves on the inner wall of the through hole, thereby increasing the friction between the tip of the pliers and the inner wall of the through hole, and improving the stability during the use of the pliers when opening one end of the snap ring.

[0016] The present utility model is further configured such that a plurality of bolt holes are equidistantly and penetratingly provided at the top of the easy-connect flange, and the number of bolt holes is eight.

[0017] By adopting the above technical solution, through the arrangement of a plurality of bolt holes, it is convenient for the butt joint installation between two flanges.

[0018] The present utility model is further configured such that the sealing ring is made of ethylene propylene diene monomer (EPDM) rubber.

[0019] By adopting the above technical solution, the ethylene propylene diene monomer (EPDM) rubber material has excellent aging resistance, ozone resistance, weather resistance and heat resistance, and can be used for a long time at 120°C.

[0020] The present utility model is further configured such that the sealing ring is in a conical shape with a larger upper part and a smaller lower part, the inner side wall at the top of the easy-connect flange is provided as an inclined surface, and the inclined surface of the inner side wall at the top of the easy-connect flange is matched with the conical surface of the sealing ring.

[0021] By adopting the above technical solution, during the butt joint installation of two flanges, the butt joint flange squeezes the sealing ring to move towards the inside of the annular installation groove. At this time, the conical surface of the sealing ring squeezes and fits on the inclined surface of the inner side wall at the top of the easy-connect flange, thereby improving the sealing performance at the inlet end of the seawater lift pump.

[0022] In summary, compared with the existing fixed flanges, the easy-connect flange of the present utility model has the following advantages:

[0023] 1. Mold cost: Adopting a dismountable flange installation structure is convenient for the separate processing of the easy-connect flange, and the precision requirement is general, which can be achieved by an ordinary lathe, avoiding the problems such as high cost caused by the need to manufacture a variety of different-sized molds to meet the requirements of various standardized flanges when the existing fixed flanges are directly cast on the centrifugal pump seawater lift pump.

[0024] 2. Material cost: The fixed flange and the seawater lift pump body are an integral whole. Generally, the flange uses the same material as the pump body. However, in actual applications, only the flow channel part of the pump body contacts the conveying medium, and the flange does not contact the conveying medium. The new easy-connect flange is not directly connected to the pump body. Therefore, for corrosive media, only the pump body needs to be made of corrosion-resistant materials, which can save a certain amount of material cost.

[0025] 3. Manufacturing cost: The fixed flange is located at the inlet and outlet positions of the seawater lift pump body. Due to the complex structure of the pump body, generally multiple processing technologies need to be developed, and multiple devices such as vertical lathes, horizontal lathes, horizontal milling machines, shapers, slotting machines (even gantry milling machines for large pump bodies) are required for processing. Moreover, the fixed flange is generally processed after all other processes are completed. If not careful, it may damage the previously qualified processed surfaces, posing a safety hazard to the equipment. However, the new type of easy-connect flange can be processed independently using a horizontal lathe. In addition, the position tolerance requirements of the mounting holes of the fixed flange for the pump body are very high. Once they are offset, the pump body cannot be connected to the ship pipeline, and the pump body can only be scrapped, resulting in waste. For the new type of easy-connect flange, it can move freely in the circumferential direction, and there is no problem of offset.

[0026] 4. Management cost: Enterprises generally produce a certain amount of inventory for emergency contracts or to deal with special situations. In order to meet the requirements of common flange standards, centrifugal pumps with fixed flanges often need to produce multiple centrifugal pumps of the same model as inventory, resulting in an increase in inventory, bringing difficulties to management work and causing a sharp rise in management costs. For centrifugal pumps with the new type of easy-connect flange, only 1 pump needs to be manufactured, and easy-connect flanges of multiple standards are produced and installed during shipment. The management cost is only one-third of the original, or even lower, further optimizing problems such as mold, material, manufacturing, and management cost increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is the front view schematic diagram of the present utility model;

[0028] Figure 2 is the front view sectional schematic diagram of the present utility model;

[0029] Figure 3 is of the present utility model Figure 2 enlarged schematic diagram of the structure at A in;

[0030] Figure 4 is the top view schematic diagram of the present utility model;

[0031] Figure 5 is the top view partial structure schematic diagram of the snap ring and through hole of the present utility model.

[0032] In the figure: 1. Seawater lift pump; 101. Ring-shaped positioning groove; 2. Easy-connect flange; 201. Ring-shaped installation groove; 202. Bolt hole; 3. Snap ring; 301. Through hole; 4. Positioning ring; 5. Sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as a limitation to the present utility model.

[0034] The following will describe its embodiments according to the overall structure of the present utility model.

[0035] An easily connectable flange for a marine seawater lift pump, as Figure 1 - Figure 5 shown, includes a seawater lift pump 1. An annular positioning groove 101 is formed on the outer wall of the inlet end at the top of the seawater lift pump 1. An easily connectable flange 2 is sleeved on the inlet end at the top of the seawater lift pump 1, and an annular installation groove 201 is formed at the top of the easily connectable flange 2. A clamping ring 3 is clamped inside the annular positioning groove 101, and the bottom of the clamping ring 3 is placed between the bottom wall of the annular positioning groove 101 and the bottom wall of the annular installation groove 201. The fixed flange and the seawater lift pump are an integral whole. Generally, the flange uses the same material as the seawater lift pump. However, in actual applications, only the flow channel part of the seawater lift pump contacts the conveying medium, and the flange does not contact the conveying medium. The easily connectable flange 2 adopts a detachable installation method, so that the easily connectable flange is not directly connected to the seawater lift pump. Therefore, for corrosive media, only the seawater lift pump needs to be made of corrosion-resistant materials, which can save certain material costs. Moreover, the sleeved easily connectable flange 2 facilitates the butt-joint of bolt holes during the butt-joint of the two flanges. A sealing ring 5 is installed at the top of the annular installation groove 201, and the inner wall of the sealing ring 5 fits against the outer wall of the top of the seawater lift pump 1. The outer wall of the sealing ring 5 is placed on the top of the easily connectable flange 2. When the easily connectable flange 2 is in use, directly sleeve the easily connectable flange 2 on the inlet at the upper end of the seawater lift pump 1. First, use a pair of needle-nose pliers to clamp the two gaps of the clamping ring 3 and forcefully expand it to fall into the annular positioning groove 101 at the inlet part of the seawater lift pump 1. At this time, the bottom of the clamping ring 3 limits the easily connectable flange 2, and thus the assembly of the easily connectable flange 2 is completed. When disassembling, insert the pointed part of the needle-nose pliers into the through hole 301 at one end of the clamping ring 3 and pull the needle-nose pliers to expand the clamping ring 3, so that the clamping ring 3 can be taken out from the annular positioning groove 101 at the inlet of the seawater lift pump 1, and then the easily connectable flange 2 can be removed. The detachable and installable flange installation structure facilitates the separate processing of the easily connectable flange 2, and the precision requirement is generally low, which can be achieved by an ordinary lathe. After processing, it can be directly sleeved on the inlet and outlet of the marine seawater lift pump. With the clamping ring for limiting, if it is necessary to replace other standard flanges, directly loosen the clamping ring, and then the easily disassembled and installed flange can be removed and replaced, avoiding the problems such as high cost caused by the need to manufacture a variety of different-sized molds to meet the requirements of various standardized flanges when the existing fixed flange is directly cast on the centrifugal pump seawater lift pump, so that a set of marine centrifugal pump products can be matched with multiple flange standards.

[0036] Please refer toFigure 2 - Figure 3 A positioning ring 4 is fixedly connected to the upper surface of the seawater lift pump 1, and the bottom of the easy-connection flange 2 is placed on the upper surface of the top of the positioning ring 4. When the easy-connection flange 2 is sleeved on the inlet end at the top of the seawater lift pump 1, the bottom of the easy-connection flange 2 is supported by the positioning ring 4, and when the clamping ring 3 limits the top of the easy-connection flange 2, the stability of the installation of the easy-connection flange 2 can be improved.

[0037] Please refer to Figure 2 - Figure 3 The cross-sectional width of the annular installation groove 201 is twice the cross-sectional width of the clamping ring 3. Since the cross-sectional width of the annular installation groove 201 is greater than the cross-sectional width of the clamping ring 3, there is no interference during the expansion of the clamping ring 3 by the pliers, which facilitates the removal of the clamping ring 3 from the annular positioning groove 101.

[0038] Please refer to Figure 5 One side of the clamping ring 3 has a notch, and the clamping ring 3 is made of manganese alloy. Through the notch provided on one side of the clamping ring 3, it is convenient to expand the clamping ring 3 with pliers, which facilitates the sleeving of the clamping ring 3 on the annular positioning groove 101, and it is made of manganese alloy, with good reset ability and can be used multiple times.

[0039] Please refer to Figure 5 One side of the clamping ring 3 is provided with a through hole 301, and the inner wall of the through hole 301 has anti-slip grooves. When expanding one end of the clamping ring 3 with pliers, the teeth at the tip of the pliers will be stuck in the anti-slip grooves on the inner wall of the through hole 301, thereby increasing the friction between the tip of the pliers and the inner wall of the through hole 301, and improving the stability during the use of the pliers when expanding one end of the clamping ring 3.

[0040] Please refer to Figure 1 A plurality of bolt holes 202 are equidistantly penetrated through the top of the easy-connection flange 2, and the number of the bolt holes 202 is eight. Through the arrangement of the plurality of bolt holes 202, it is convenient for the butt joint installation between two flanges.

[0041] Please refer to Figure 2 - Figure 3 The sealing ring 5 is made of ethylene propylene diene monomer (EPDM). EPDM has excellent aging resistance, ozone resistance, weather resistance and heat resistance, and can be used for a long time at 120 °C.

[0042] Please refer to Figure 2 - Figure 3, the sealing ring 5 is conical with a larger upper part and a smaller lower part. The inner side wall at the top of the easy-connection flange 2 is set as an inclined surface, and the inclined surface of the inner side wall at the top of the easy-connection flange 2 is matched with the conical surface of the sealing ring 5. During the butt joint installation of the two flanges, the butt joint flanges squeeze the sealing ring 5 to move towards the inside of the annular installation groove 201. At this time, the conical surface of the sealing ring 5 is squeezed and fitted on the inclined surface of the inner side wall at the top of the easy-connection flange 2, thereby improving the sealing performance of the inlet end of the seawater lift pump 1.

[0043] The working principle of the present utility model is as follows: When the easy-connection flange 2 is used, directly put the easy-connection flange 2 on the inlet at the upper end of the seawater lift pump 1. First, use pliers to clamp the two gaps on both sides of the snap ring 3 and force it to expand and fall into the annular positioning groove 101 at the inlet part of the seawater lift pump 1. At this time, the bottom of the snap ring 3 limits the easy-connection flange 2, and the assembly of the easy-connection flange 2 is completed. When disassembling, insert the tip of the pliers into the through hole 301 at one end of the snap ring 3 and pull the pliers to expand the snap ring 3, so that the snap ring 3 is taken out from the annular positioning groove 101 at the inlet of the seawater lift pump 1, and the easy-connection flange 2 can be removed.

[0044] Although the embodiments of the present utility model have been shown and described, the specific embodiments are only explanations of the present utility model and not limitations thereof. The specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art can make modifications, substitutions and variations without creative contributions to the embodiments as needed, but as long as they are within the scope of the claims of the present utility model, they are protected by the patent law.

Claims

1. An easy-to-connect flange for a marine seawater lifting pump, comprising a seawater lifting pump (1), characterized in that: An annular positioning groove (101) is provided on the outer wall of the top inlet end of the seawater lifting pump (1), an easy-connect flange (2) is mounted on the top inlet end of the seawater lifting pump (1), and an annular mounting groove (201) is provided on the top of the easy-connect flange (2), a snap ring (3) is clamped inside the annular positioning groove (101), and the bottom of the snap ring (3) is arranged between the bottom wall of the annular positioning groove (101) and the bottom wall of the annular mounting groove (201), a sealing ring (5) is installed on the top of the annular mounting groove (201), and the inner wall of the sealing ring (5) is in contact with the outer wall of the top of the seawater lifting pump (1), and the outer wall of the sealing ring (5) is arranged on the top of the easy-connect flange (2).

2. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: A positioning ring (4) is fixedly connected to the surface of the upper end of the seawater lifting pump (1), and the bottom of the easy-connection flange (2) is placed on the surface of the top of the positioning ring (4).

3. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: The cross-sectional width of the annular mounting groove (201) is twice the cross-sectional width of the clamping ring (3).

4. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: One side of the clamping ring (3) has a notch, and the clamping ring (3) is made of a manganese alloy.

5. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: A through hole (301) is provided on one side of the clamping ring (3), and an inner wall of the through hole (301) has an anti-slip groove.

6. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: A plurality of bolt holes (202) are uniformly spaced through the top of the easy-connect flange (2), and the number of the bolt holes (202) is eight.

7. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: The sealing ring (5) is made of EPDM rubber.

8. The easy-connect flange for a marine seawater lifting pump according to claim 1, characterized in that: The sealing ring (5) is in a conical shape with a larger upper portion and a smaller lower portion. The inner side wall of the top of the easy-connect flange (2) is configured as an inclined surface, and the inclined surface of the inner side wall of the top of the easy-connect flange (2) matches the conical surface of the sealing ring (5).

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