Vertical high-speed pump body capable of being rapidly replaced

Abstract

The utility model discloses a pump body of a vertical high-speed pump capable of being quickly replaced. The pump body comprises a pump body main body, a diffuser and a flow guide sleeve, a stepped assembly cavity is formed in the inner wall of the pump body, and the diffuser and the flow guide sleeve are sequentially assembled in the assembly cavity from top to bottom. The inner wall of the diffuser is provided with a main impeller cavity, and the inner wall of the flow guide sleeve is provided with an inducer cavity. The pump body is divided into a plurality of parts such as the pump body main body, the diffuser and the flow guide sleeve, and materials and inner hole sizes of the diffuser and the flow guide sleeve can be selected, processed and manufactured according to different working conditions, so that the function that the pump body of the same model can cope with different working condition parameters is realized; moreover, when the interior of the flow passage component of the pump body is corroded and abraded, only damaged parts need to be disassembled and replaced, so that the production and manufacturing time and the production cost are greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump body and machining technical field, concretely relates to a vertical high speed pump pump body of quick replacement. BACKGROUND

[0002] The high speed pump body has irreplaceable effect in the high speed pump, such as increasing water pressure, improving water flow state, reducing water flow noise and heat transfer effect etc. Specifically, when the water pump is operated, the impeller in the pump body rotates, water is sucked into the pump body, and then the water pressure is increased through the pump body outlet, so that water can smoothly enter the water pipe, and the purpose of increasing water pressure is achieved. In addition, the reasonable design inside the pump body can make the water be effectively accelerated and decelerated when passing through the pump body, so as to improve the water flow state, reduce the turbulent state and improve the quality of water flow. The pump body can also reduce the water flow noise through reasonable design, and transmit heat through contact with the water pipe to affect the temperature of water.

[0003] Because the internal structure of the high speed pump body is complex, the common pump body machining method on the market is integral mold casting, and then milling the internal flow channel. Once the flow part of the pump body produced by this method has defects such as corrosion and wear, it is difficult to repair and reuse, and a new pump body usually needs to be replaced. And once the customer carries out process improvement, the working condition changes, the same pump body is no longer applicable, and a new mold needs to be opened to cast a new pump body, which not only greatly increases the production and manufacturing cost, but also prolongs the delivery cycle and increases the customer downtime.

[0004] In view of these problems, further technical improvement is needed at present to improve the performance of the pump body and reduce the production cost of the pump body. INVENTION CONTENTS

[0005] In order to overcome the defects of the existing integral mold casting pump body, the utility model provides a vertical high speed pump pump body of quick replacement.

[0006] The technical scheme adopted by the utility model is as follows: a vertical high speed pump pump body of quick replacement, comprising a pump body main body, a diffuser and a flow guide sleeve, a stepped assembly cavity is arranged on the inner wall of the pump body main body, the diffuser and the flow guide sleeve are sequentially assembled in the assembly cavity from top to bottom, a main impeller cavity is arranged on the inner wall of the diffuser, and an inducer cavity is arranged on the inner wall of the flow guide sleeve.

[0007] Preferably, the diffuser and the flow guide sleeve are fixed as a whole through locking screws.

[0008] Preferably, the diffuser is provided with a plurality of threaded holes, the flow guide sleeve is provided with a plurality of counterbores correspondingly, and the locking screws are connected and fixed in the counterbores and the threaded holes.

[0009] Preferably, a first sealing ring is arranged between the flow guide sleeve and the pump body, a second sealing ring is arranged between the diffuser and the flow guide sleeve, and a third sealing ring is arranged between the pump body and the diffuser.

[0010] Preferably, a first sealing groove is arranged on the abutting surface of the flow guide sleeve and the pump body, a second sealing groove is arranged on the abutting surface of the flow guide sleeve and the diffuser, and a third sealing groove is arranged on the abutting surface of the diffuser and the pump body.

[0011] Preferably, the main impeller cavity is formed by the diffuser inner hole and the diffuser inclined surface, and the inducer cavity is formed by the flow guide sleeve inner hole; the diffuser inner hole has the same diameter as the flow guide sleeve inner hole.

[0012] Preferably, the pump body is made of ordinary cast steel, and the diffuser and the flow guide sleeve are made of one of ordinary cast steel, duplex stainless steel, titanium alloy, and nickel-based alloy.

[0013] Preferably, the diffuser and the flow guide sleeve are fixed in the assembly cavity by being pressed by the pump cover.

[0014] The utility model has the following beneficial effects:

[0015] 1. The pump body is divided into a pump body, a diffuser, a flow guide sleeve and other parts, the pump body is changed from a non-standard part to a standard part, batch production can be carried out, production efficiency is improved, and production cost is reduced.

[0016] 2. The diffuser and the flow guide sleeve are small in size and light in weight, and the cost of spare parts storage is much lower than that of the whole pump body.

[0017] 3. If the pump body overflows and the internal corrosion, wear and tear and other damages, only need to disassemble and replace the new diffuser and flow guide sleeve, convenient and fast, do not need to produce the whole pump body again.

[0018] 4. The diffuser and the flow guide sleeve material and inner hole size can be selected and processed according to different working conditions, and the applicability is wider. DRAWINGS

[0019] Figure 1 It is the assembly schematic view of the pump body in the utility model embodiment.

[0020] Figure 2 It is the sectional view schematic view of the pump body in the utility model embodiment.

[0021] Figure 3 It is the assembly schematic view of the diffuser and the flow guide sleeve in the utility model embodiment.

[0022] Figure 4This is a cross-sectional schematic diagram of the diffuser in an embodiment of this utility model.

[0023] Figure 5 This is a cross-sectional schematic diagram of the guide sleeve in an embodiment of this utility model.

[0024] Figure 6 This is a partial assembly diagram of the pump in a utility model embodiment.

[0025] Pump body 1, assembly cavity 101;

[0026] Diffuser 2, diffuser inclined surface 201, diffuser inner hole 202, threaded hole 203, main impeller cavity 204, third sealing groove 205;

[0027] Locking screw 3;

[0028] Guide sleeve 4, countersunk hole 401, first sealing groove 402, second sealing groove 403, guide sleeve inner hole 404, inducer cavity 405;

[0029] First sealing ring 5;

[0030] Second sealing ring 6;

[0031] Third sealing ring 7;

[0032] Pump cover 8;

[0033] Main impeller 9;

[0034] Inducer wheel 10. Detailed Implementation

[0035] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0036] In the embodiments, such as Figures 1-6 As shown, this is a quick-replaceable RCP-V2 type vertical high-speed pump body, including a pump body body 1, a diffuser 2, and a flow guide sleeve 4. The inner wall of the pump body body 1 has a stepped assembly cavity 101, in which the diffuser 2 and the flow guide sleeve 4 are assembled sequentially from top to bottom. The inner wall of the diffuser 2 has a main impeller cavity 204, and the inner wall of the flow guide sleeve 4 has an inducer cavity 405. In this embodiment, the pump body is disassembled into multiple components such as the pump body body 1, the diffuser 2, and the flow guide sleeve 4. The pump body body is transformed from a non-standard part into a standard part, which can be mass-produced, improving production efficiency and reducing production costs. The disassembled diffuser 2 and flow guide sleeve 4 are small in size and light in weight, and the cost of manufacturing and stocking spare parts is far lower than that of the entire pump body. If corrosion, wear, or other damage occurs inside the pump body's flow-through components, only the diffuser 2 and flow guide sleeve 4 need to be disassembled and replaced, which is convenient and quick, and does not require the remanufacturing of the entire pump body. The materials and inner hole dimensions of the diffuser 2 and the flow guide sleeve 4 can be selected and manufactured according to different working conditions, making them more widely applicable.

[0037] In the embodiment, as shown in Figures 3-5 , the diffuser 2 and the flow guide sleeve 4 are fixed as a whole by the locking screw 3. Specifically, the diffuser 2 is provided with a plurality of threaded holes 203, the flow guide sleeve 4 is correspondingly provided with a plurality of counterbores 401, and the locking screw 3 is connected and fixed in the counterbores 401 and the threaded holes 203. The locking screw 3 is used to realize the quick connection of the diffuser 2 and the flow guide sleeve 4, avoiding the damage caused by the traditional welding or interference fit during disassembly. This structure makes the replacement operation of the core flow part more convenient, and does not require special tools, significantly improving the installation efficiency. Through the cooperation structure of the threaded hole 203 and the counterbore 401, the axial alignment accuracy of the locking screw 3 is ensured, preventing sealing failure caused by misalignment installation. The counterbore 401 embeds the screw head inside the flow guide sleeve 4, maintaining the flatness of the outer surface of the flow guide sleeve 4, and facilitating installation.

[0038] In the embodiment, as shown in Figures 1-5 , the abutting surface of the flow guide sleeve 4 and the pump body 1 is provided with a first sealing groove 402, the abutting surface of the flow guide sleeve 4 and the diffuser 2 is provided with a second sealing groove 403, and the abutting surface of the diffuser 2 and the pump body 1 is provided with a third sealing groove 205; the first sealing groove 402, the second sealing groove 403 and the third sealing groove 205 are respectively installed with the first sealing ring 5, the second sealing ring 6 and the third sealing ring 7. The first sealing ring 5 prevents the liquid at the inlet from leaking through the connection between the flow guide sleeve 4 and the pump body 1; the second sealing ring 6 prevents the liquid at the inlet from leaking through the connection between the flow guide sleeve 4 and the diffuser 2; and the third sealing ring 7 prevents the liquid at the outlet of the pump body from leaking through the connection between the pump body 1 and the diffuser 4, thereby reducing the flow performance. The three seals coordinate with each other to block the risk of liquid leakage in the low-pressure inlet, the transition area between the impeller and the inducer, and the high-pressure outlet, and are suitable for corrosive medium working conditions. The prefabricated structure of the first sealing groove 402, the second sealing groove 403 and the third sealing groove 205 controls the compression amount of each sealing ring within a small range, avoiding excessive compression that leads to aging or insufficient compression that causes leakage, thereby prolonging the service life of the seal.

[0039] In the embodiment, as shown in Figure 4 , Figure 5 , the main impeller cavity 204 is formed by the diffuser slope 201 and the diffuser inner hole 202, and the inducer cavity 405 is formed by the flow guide sleeve inner hole 404; the hole diameter of the diffuser inner hole 202 is consistent with the hole diameter of the flow guide sleeve inner hole 404, i.e. D1=D2. The consistent sizes of D1 and D2 stabilize the flow rate when the fluid transitions from the inducer cavity 405 to the main impeller cavity 204, reduce the intensity of turbulent flow, reduce the cavitation phenomenon, and effectively reduce the vibration of rotating parts such as the main impeller 9 and the inducer 10, thereby improving the pump efficiency.

[0040] In the embodiment, the material of the pump body 1 is common cast steel, and the materials of the diffuser 2 and the flow guide sleeve 4 are one of common cast steel, duplex stainless steel, titanium alloy or nickel-based alloy. The duplex stainless steel, titanium alloy, nickel-based alloy and other materials have high strength, and have obvious improvement in the resistance to intergranular corrosion and chloride stress corrosion, have excellent resistance to hole corrosion and other multiple effects, and thus are particularly suitable for being used as the machining material of the flow parts such as the pump body of the high-speed pump, and are beneficial to improving the reliability, corrosion resistance and service life of the pump body of the high-speed pump.

[0041] In the embodiment, as shown in Figure 6 The diffuser 2 and the flow guide sleeve 4 are fixed in the assembly cavity 101 by being pressed by the pump cover 8. The pump cover 8 is fixed to the pump body 1 by bolts, and the diffuser 2 and the flow guide sleeve 4 are pressed and constrained by the axial pressing force, so that the fretting wear of the parts under high-speed operation is eliminated, and the stable and reliable operation of the parts is ensured.

[0042] Obviously, the above embodiment of the utility model is only for illustration, and does not limit the implementation mode of the utility model. Other obvious changes or variations derived from the essential spirit of the utility model still belong to the protection scope of the utility model.

Claims

1. A quick-change vertical high-speed pump body, characterized in that, Including pump body main part (1), diffuser (2) and flow guide sleeve (4), the inner wall of pump body main part (1) is equipped with stepped assembly cavity (101), diffuser (2) and flow guide sleeve (4) are sequentially assembled in assembly cavity (101) from top to bottom, the inner wall of diffuser (2) is equipped with main impeller cavity (204), the inner wall of flow guide sleeve (4) is equipped with inducer cavity (405).

2. The quick change vertical high speed pump body of claim 1, wherein, Diffuser (2) and flow guide sleeve (4) are fixed as a whole by locking screw (3).

3. The quick change vertical high speed pump body of claim 2, wherein, Diffuser (2) is equipped with multiple threaded holes (203), flow guide sleeve (4) is correspondingly equipped with multiple counterbores (401), locking screw (3) is connected and fixed in counterbores (401) and threaded holes (203).

4. The quick change vertical high speed pump body of claim 1, wherein, First sealing ring (5) is arranged between flow guide sleeve (4) and pump body main part (1), second sealing ring (6) is arranged between diffuser (2) and flow guide sleeve (4), third sealing ring (7) is arranged between pump body main part (1) and diffuser (2).

5. The quick change vertical high speed pump body of claim 4, wherein, The abutting surface of flow guide sleeve (4) and pump body main part (1) is equipped with first sealing groove (402), the abutting surface of flow guide sleeve (4) and diffuser (2) is equipped with second sealing groove (403), and the abutting surface of diffuser (2) and pump body main part (1) is equipped with third sealing groove (205).

6. The quick change vertical high speed pump body of claim 1, wherein, Main impeller cavity (204) is formed by diffuser bevel (201) and diffuser inner hole (202), inducer cavity (405) is formed by flow guide sleeve inner hole (404), the aperture of diffuser inner hole (202) is consistent with the aperture of flow guide sleeve inner hole (404).

7. The quick change vertical high speed pump body of claim 1, wherein, The material of pump body main part (1) is ordinary cast steel, and the material of diffuser (2) and flow guide sleeve (4) is one of ordinary cast steel, duplex stainless steel, titanium alloy or nickel-based alloy.

8. The quick change vertical high speed pump body of claim 1, wherein, Diffuser (2) and flow guide sleeve (4) are pressed and fixed in assembly cavity (101) by pump cover (8).

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