Pump chamber structure of horizontal multi-stage pump

Abstract

The utility model provides a horizontal multistage pump's pump chamber structure, including multistage pump body, pump chamber shell, rotation ring, tooth, blind, baffle, adjusting seat, drive gear and internal hex adjusting block, the outside welding of multistage pump body has adjusting seat, the upper end surface rotation of adjusting seat is provided with internal hex adjusting block, the inside of multistage pump body is provided with pump chamber shell, the outside surface rotation of pump chamber shell is provided with rotation ring, the outside of rotation ring is provided with tooth, the inside rotation of pump chamber shell is provided with blind, the inside welding of pump chamber shell has baffle, the outside of pump chamber shell is provided with drive gear, this design has solved the problem that the different pump levels of original horizontal multistage pump are prone to misadjustment, the utility model discloses reasonable structure, through setting up baffle and adjustable blind before the impeller entrance of the pump level that needs to adjust, thereby the flow that flows into this level impeller is fine -tuned, makes the working condition of impeller be in the high -efficient stable work area.

Description

Technical Field

[0001] This utility model relates to the pump chamber structure of a horizontal multistage pump, belonging to the field of multistage pump technology. Background Technology

[0002] A multistage pump is a centrifugal pump in which the inlet, outlet, and intermediate sections are connected by a tie rod. It can output a large water pressure by relying on the rotation of the impeller to obtain centrifugal force. When the gas density reaches the working range of a mechanical vacuum pump, it is extracted. Each stage of a multistage pump is designed for a specific flow rate and head. However, in actual variable operating conditions, due to fluid inertia and changes in the internal flow field, the working states of the first-stage impeller and the last-stage impeller differ the most. Therefore, mismatch between the stages of the multistage pump may occur. Under high flow conditions, the last-stage impeller is overloaded, which can easily lead to surge and overload. There is an urgent need for a horizontal multistage pump chamber structure to solve the above problems. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pump chamber structure for a horizontal multistage pump to solve the problems mentioned in the background art. The present utility model has a reasonable structure. By setting a baffle and an adjustable baffle in front of the impeller inlet of the pump stage that needs to be adjusted, the flow rate flowing into the impeller of that stage can be finely adjusted, so that the impeller is in a high-efficiency and stable working range.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a pump chamber structure for a horizontal multistage pump, comprising a multistage pump body, a pump chamber shell, a rotating ring, teeth, a baffle plate, a partition plate, an adjusting seat, a drive gear, and an internal hexagonal adjustment block. An adjusting seat is welded to the outer side of the multistage pump body, and an internal hexagonal adjustment block is rotatably mounted on the upper surface of the adjusting seat. A pump chamber shell is disposed inside the multistage pump body, and a rotating ring is rotatably mounted on the outer side of the pump chamber shell. Teeth are provided on the outer side of the rotating ring. A baffle plate is rotatably mounted on the inner side of the pump chamber shell, and a partition plate is welded to the inner side of the pump chamber shell. A drive gear is disposed on the outer side of the pump chamber shell.

[0005] Furthermore, the pump chamber housing and other specifications are provided in several sets, a rotating groove is opened on the outer side of the pump chamber housing, the rotating ring slides tightly along the inner wall of the rotating groove, and the baffle is fixedly connected to the inner side of the rotating ring.

[0006] Furthermore, the shield and other specifications are provided in three sets, the partition and other specifications are provided in three sets, the partition has a storage cavity on its inner side, and the shield slides tightly along the inner wall of the storage cavity.

[0007] Furthermore, the adjusting seat has a sealing groove inside, the lower end face of the internal hexagonal adjusting block is provided with a connecting shaft, the outer side of the connecting shaft is fitted with a sealing rotating seat, the sealing rotating seat rotates along the inner wall of the sealing groove, and the sealing rotating seat is made of wear-resistant rubber.

[0008] Furthermore, a second bevel gear is fixedly connected to the lower end of the connecting shaft, and rotating shafts are provided on both sides of the driving gear. A first bevel gear is fixedly connected to the right end of the rotating shaft, and the first bevel gear and the second bevel gear mesh with each other.

[0009] Furthermore, a rotating connecting frame is welded to the outer side of the pump chamber housing, and the drive gear is rotatably connected to the rotating connecting frame via a rotating shaft. Two sets of rotating connecting frames are provided with the same specifications, and the drive gear meshes with the teeth.

[0010] The beneficial effects of this utility model are as follows: The pump chamber structure of this horizontal multistage pump incorporates an internal hexagonal adjustment block, a first bevel gear, a second bevel gear, a drive gear, teeth, a rotating ring, and a baffle. Users can rotate the internal hexagonal adjustment block using a dedicated internal hexagonal wrench. The internal hexagonal adjustment block drives the second bevel gear to rotate via a connecting rod. Since the second bevel gear meshes with the first bevel gear, the second bevel gear drives the first bevel gear to rotate, which in turn drives the drive gear to rotate. The drive gear, through its teeth, drives the adjustment ring to rotate. The adjustment ring causes the baffle to move out of the partition's receiving cavity, thus achieving the purpose of blocking. By adjusting the baffle from outside the multistage pump body, the gap area between the baffle and the flow channel is changed, thereby locally altering the flow resistance and achieving fine-tuning of the flow rate into the impeller of that stage. Ultimately, this "pulls back" or "pulls back" the impeller's operating point to the high-efficiency and stable working range. Attached Figure Description

[0011] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0012] Figure 1 This is a schematic diagram of the pump chamber structure of a horizontal multistage pump according to the present invention;

[0013] Figure 2 This is a partial cross-sectional view of the pump chamber structure of a horizontal multistage pump according to the present invention.

[0014] Figure 3 This is a partial cross-sectional view of the pump chamber structure of a horizontal multistage pump according to the present invention.

[0015] Figure 4 This is a partial cross-sectional view of the pump chamber structure of a horizontal multistage pump according to the present invention.

[0016] Figure 5 This is a partial disassembly diagram of the pump chamber structure of a horizontal multistage pump according to the present invention;

[0017] In the diagram: 1-Multistage pump body, 2-Pump chamber shell, 21-Rotating groove, 3-Rotating ring, 4-Gear, 5-Baffle, 6-Partition, 61-Receiving cavity, 7-Adjusting seat, 71-Sealing rotating groove, 8-Drive gear, 81-Rotating shaft, 82-Rotating connecting frame, 83-First bevel gear, 9-Internal hexagonal adjusting block, 91-Connecting shaft, 92-Sealing rotating seat, 93-Second bevel gear. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0019] Please see Figures 1-5 This utility model provides a technical solution: a pump chamber structure for a horizontal multistage pump, including a multistage pump body 1, a pump chamber shell 2, a rotating ring 3, teeth 4, a baffle 5, a partition 6, an adjusting seat 7, a drive gear 8, and an internal hexagonal adjusting block 9. The adjusting seat 7 is welded to the outside of the multistage pump body 1, and the internal hexagonal adjusting block 9 is rotatably mounted on the upper end face of the adjusting seat 7. The pump chamber shell 2 is disposed inside the multistage pump body 1, and the rotating ring 3 is rotatably mounted on the outer side of the pump chamber shell 2. Teeth 4 are provided on the outer side of the rotating ring 3. The baffle 5 is rotatably mounted on the inner side of the pump chamber shell 2, and the partition 6 is welded to the inner side of the pump chamber shell 2. The drive gear 8 is disposed on the outer side of the pump chamber shell 2. This design solves the problem of misalignment between different pump stages in the original horizontal multistage pump.

[0020] As the first embodiment of this utility model: the pump chamber shell 2 is provided with several sets of specifications, and a rotating groove 21 is opened on the outer side of the pump chamber shell 2. The rotating ring 3 slides tightly along the inner wall of the rotating groove 21. The baffle 5 is fixedly connected to the inner side of the rotating ring 3. The rotating ring 3 can drive the baffle 5 to rotate together. There are three sets of specifications for the baffle 5 and three sets of specifications for the partition 6. The inner side of the partition 6 is provided with a receiving cavity 61. The baffle 5 slides tightly along the inner wall of the receiving cavity 61. By adjusting the position of the baffle 5 in the receiving cavity 61, the inlet flow rate is adjusted. The adjusting seat 7 is provided with a sealing rotating groove 71. The lower end face of the internal hexagonal adjusting block 9 is provided with a connecting shaft 91. The outer side of the connecting shaft 91 is fitted with a sealing rotating seat 92. The sealing rotating seat 92 rotates along the inner wall of the sealing rotating groove 71. The sealing rotating seat 92 is made of wear-resistant rubber. The design of the sealing rotating seat 92 and the sealing rotating groove 71 ensures that the rotation of the connecting shaft 91 will not affect the sealing performance. At the same time, the wear-resistant rubber is made of wear-resistant rubber. The sealing rotary seat 92 has significant resistance when rotating. This design prevents the second bevel gear 93 from loosening while ensuring a seal. The second bevel gear 93 will only rotate when the user rotates the internal hexagonal adjustment block 9 using an internal hexagonal tool. The lower end of the connecting shaft 91 is fixedly connected to the second bevel gear 93. Rotating shafts 81 are provided on both sides of the drive gear 8. The right end of the rotating shaft 81 is fixedly connected to the first bevel gear 83. The first bevel gear 83 and the second bevel gear 93 mesh with each other, and the second bevel gear 93 can drive the first bevel gear 83 to rotate together. A rotating connecting frame 82 is welded to the outer side of the pump chamber shell 2. The drive gear 8 is rotatably connected to the rotating connecting frame 82 through the rotating shaft 81. Two sets of rotating connecting frames 82 are provided. The drive gear 8 meshes with the teeth 4. The first bevel gear 83 can drive the drive gear 8 to rotate. The rotation of the drive gear 8 can drive the rotating ring 3 to rotate through the teeth 4.

[0021] As a second embodiment of this utility model: the user can adjust the flow rate of each stage of the multi-stage pump according to the specific operating conditions. For example, under low flow conditions, cavitation is prone to occur in the first-stage impeller. In this case, the user can rotate the internal hexagonal adjustment block 9 using a special internal hexagonal adjustment wrench. The internal hexagonal adjustment block 9 drives the second bevel gear 93 to rotate through the connecting rod. Since the second bevel gear 93 meshes with the first bevel gear 83, the second bevel gear 93 drives the first bevel gear 83 to rotate. The first bevel gear 83 drives the drive gear 8 to rotate. The drive gear 8 drives the adjusting ring to rotate through the teeth 4. The adjusting ring drives the shielding... Plate 5 is moved out of the receiving cavity 61 of the baffle 6 to serve as a shield, thereby reducing the inflow rate before the first-stage impeller, appropriately increasing the inlet pressure of the first-stage impeller, effectively suppressing cavitation, and protecting the impeller material. Similarly, under high-flow conditions, the operator can adjust the baffle 5 of the last stage in the same way to change the characteristics of the last stage and prevent it from entering the surge zone. By adjusting from outside the multi-stage pump body 1, the gap area between the baffle 5 and the flow channel is changed, thereby locally changing the flow resistance and achieving fine-tuning of the flow rate into the impeller of that stage. Ultimately, the operating point of the impeller of that stage is "pushed back" or "pulled back" to the high-efficiency and stable operating zone.

[0022] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pump chamber structure for a horizontal multistage pump, comprising a multistage pump body, a pump chamber shell, a rotating ring, gears, a baffle plate, a partition plate, an adjusting seat, a drive gear, and an internal hexagonal adjustment block, characterized in that: An adjusting seat is welded to the outside of the multi-stage pump body. An internal hexagonal adjusting block is rotatably arranged on the upper end face of the adjusting seat. A pump chamber shell is arranged inside the multi-stage pump body. A rotating ring is rotatably arranged on the outer side of the pump chamber shell. Teeth are arranged on the outer side of the rotating ring. A baffle is rotatably arranged on the inner side of the pump chamber shell. A partition is welded to the inner side of the pump chamber shell. A drive gear is arranged on the outer side of the pump chamber shell.

2. The pump chamber structure of a horizontal multistage pump according to claim 1, characterized in that: The pump chamber housing is provided with several sets of specifications, and a rotating groove is opened on the outer side of the pump chamber housing. The rotating ring slides tightly along the inner wall of the rotating groove, and the baffle is fixedly connected to the inner side of the rotating ring.

3. The pump chamber structure of a horizontal multistage pump according to claim 1, characterized in that: The shield and other specifications are provided in three sets, the partition and other specifications are provided in three sets, the inner side of the partition is provided with a storage cavity, and the shield slides tightly along the inner wall of the storage cavity.

4. The pump chamber structure of a horizontal multistage pump according to claim 1, characterized in that: The adjusting seat has a sealing groove inside, and the lower end face of the internal hexagonal adjusting block is provided with a connecting shaft. The outer side of the connecting shaft is fitted with a sealing rotating seat, which rotates along the inner wall of the sealing groove. The sealing rotating seat is made of wear-resistant rubber.

5. The pump chamber structure of a horizontal multistage pump according to claim 4, characterized in that: The lower end of the connecting shaft is fixedly connected to a second bevel gear, and rotating shafts are provided on both sides of the driving gear. The right end of the rotating shaft is fixedly connected to a first bevel gear, and the first bevel gear and the second bevel gear mesh with each other.

6. The pump chamber structure of a horizontal multistage pump according to claim 1, characterized in that: A rotating connecting frame is welded to the outer side of the pump chamber housing. The drive gear is rotatably connected to the rotating connecting frame via a rotating shaft. Two sets of rotating connecting frames are provided with the same specifications. The drive gear meshes with the teeth.

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