Sealing type double-screw pump

Abstract

The utility model discloses a sealed double-screw pump, which comprises a pump body, a liquid inlet and a liquid outlet which are arranged on the pump body, and a double-screw pump main body formed by two groups of meshed screws which are rotatably arranged on a corresponding shaft body in a cavity between the liquid inlet and the liquid outlet, a plurality of evenly-arranged corrugated guide faces are arranged on the inner wall of a cavity, matched with installation of the screws, of the pump body structure in a surrounding mode, and the highest points of the arc faces of the corrugated guide faces make contact with the outer wall faces, corresponding to the spiral structures, of the screws. According to the double-screw pump, a plurality of corrugated guide surfaces which are uniformly arranged are arranged on the inner wall of a cavity, matched with installation of screws, of the pump body structure in a surrounding manner, so that the phenomena of long-time retention and accumulation of a liquid medium in the pump body can be effectively reduced when the liquid medium is conveyed, and meanwhile, the sealing performance, the conveying effect and the conveying stability of the double-screw pump are further improved.

Description

Technical Field

[0001] This utility model relates to the field of screw pumps, specifically to a sealed twin-screw pump. Background Technology

[0002] In the field of fluid transportation, twin-screw pumps are widely used in industries such as petrochemicals, food processing, pharmaceuticals, and environmental protection because they can continuously and stably transport high-viscosity media containing solid particles. Currently available twin-screw pumps mainly consist of two meshing helical screws. A sealed chamber with a constant volume is formed between the meshing helical sleeves on the driving and driven shafts and the pump body or bushing. As the screw shafts rotate, the medium is separately delivered to the middle of the pump body, where the two parts merge and are finally delivered to the pump outlet, thus achieving the pump's transportation purpose.

[0003] However, the mainstream twin-screw pumps on the market have a fixed arrangement of meshing twin screws inside the pump body. During installation, they often leave a certain distance from the pump body's internal cavity and form a cavity within a certain range. When transporting liquid media, the turbulence and transport effect of the liquid media are not ideal. The phenomenon of back-and-forth flow is prone to occur, which means that the added liquid media cannot be discharged in time. The long-term retention and accumulation of liquid media added at different times are easily affected by the external environment, resulting in condensation or even deterioration. It is also easy to corrode the pump body cavity, thus affecting the pump body's sealing performance and transport stability. Utility Model Content

[0004] The purpose of this invention is to provide a sealed twin-screw pump that can effectively reduce the long-term retention and accumulation of liquid media inside the pump body when transporting liquid media, while further improving the sealing performance, transport effect and transport stability of this twin-screw pump.

[0005] The technical solution adopted by this utility model to solve the above problems is:

[0006] A sealed twin-screw pump includes a pump body, an inlet and an outlet provided thereon, and a twin-screw pump body formed by two sets of meshing screws rotatably mounted on corresponding shafts within a cavity between the inlet and outlet. The pump body structure is adapted to the inner wall of the cavity where the screws are mounted, and a plurality of uniformly arranged corrugated guide surfaces are arranged around it. The highest point of the arc surface of the corrugated guide surface contacts the outer wall surface of the corresponding helical structure on the screw.

[0007] Preferably, a corrugated sleeve structure is formed by several uniformly arranged corrugated guide surfaces on the inner wall of the pump body's internal cavity, and the corrugated sleeve is installed on the corresponding inner wall of the pump body's internal cavity through a detachable structure.

[0008] Preferably, the corrugated sleeve is made of a flexible material with a certain elastic strength.

[0009] Preferably, the mounting cavity inside the pump body that adapts to the two sets of screws and the adapter shell structure formed by the external part are arranged in a connected double-cylinder structure.

[0010] Preferably, the liquid inlet and liquid outlet are respectively located at corresponding positions on the top and side of the housing.

[0011] Preferably, the screw has grooves circumferentially formed on its helical surface, and the grooves are arranged in multiple sets and uniformly along the central axis of the screw.

[0012] Compared with the prior art, this utility model has the following advantages and effects:

[0013] This utility model relates to a sealed twin-screw pump. Compared to traditional pump body structures, this twin-screw pump features two sets of screws inside the pump body. During rotation, the inner wall of the cavity where the screws are mounted has several evenly arranged corrugated guide surfaces. These surfaces provide sealing and guidance for the liquid medium carried by the corresponding helical surfaces during screw rotation. The arrangement of the highest point of the corresponding arc surface contacting the outer wall of the corresponding helical structure on the screw effectively reduces the cavity between the screws and the pump body's internal cavity. This reduces the phenomenon of liquid flowing back and forth, improves the utilization rate of the pump body's internal idle space, and further enhances the screw's conveying efficiency and stability of the liquid medium within the pump body's internal cavity. It effectively reduces the long-term retention and accumulation of the liquid medium inside the pump body, ensuring the timely delivery of the liquid medium within the corresponding time period, and reducing the phenomenon of liquid medium condensation or even deterioration. At the same time, the corrugated guide surface at the corresponding position can also improve the structural compactness between the pump body's internal cavity and the screw, as well as the sealing effect inside the cavity, thereby improving the working efficiency and working stability of this twin-screw pump body. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a sealed twin-screw pump according to an embodiment of the present invention.

[0015] Figure 2-4 This is a cross-sectional view of the main body of the twin-screw pump according to an embodiment of this utility model.

[0016] Figure numbers: Pump body 100, Inlet 101, Outlet 102, Cavity 103, Shell 104, Screw 1, Outer wall surface 11, Helical surface 12, Groove 121, Corrugated guide surface 2, Corrugated sleeve 21. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0018] See Figure 1-3 This embodiment relates to a sealed twin-screw pump, comprising a pump body 100 and an inlet 101 and an outlet 102 thereon, and a twin-screw pump body formed by two sets of meshing screws 1 rotatably mounted on corresponding shafts in a cavity 103 between the inlet 101 and the outlet 102. The pump body 100 is structurally adapted to the inner wall of the cavity 103 where the screws are mounted, and a plurality of uniformly arranged corrugated guide surfaces 2 are arranged around it. The highest point of the arc surface of the corrugated guide surface 2 is in contact with the outer wall surface 11 of the corresponding spiral structure on the screw 1.

[0019] Specifically in this embodiment, such as Figure 1 The overall structure of the twin-screw pump shown herein allows for the filling of the corresponding liquid medium through the inlet 101 provided on the pump body 100 during use. See also... Figure 2 and Figure 3 As shown, the liquid medium entering the internal cavity 103 of the pump body 100 through the inlet 101 can be transported along the internal cavity 103 of the pump body 100 to the outlet 102 for subsequent discharge by two sets of meshing screws 1 rotatably mounted on the corresponding shaft inside the cavity 103. Furthermore, compared to the traditional pump body 100 structure, this twin-screw pump body has several evenly arranged corrugated guide surfaces 2 surrounding the inner wall of the cavity 103 where the screws 1 are installed during rotation. These guide surfaces provide a certain degree of sealing and guiding for the liquid medium carried out on the corresponding helical surface 12 during the movement and transport of the screws 1. The highest point of the corresponding arc surface contacts the outer wall surface 11 of the corresponding helical structure on the screw 1. The arrangement of the two sets of screws 1 effectively reduces the cavity phenomenon between the screws 1 and the internal cavity 103 of the pump body 100, reduces the phenomenon of liquid flowing back and forth, improves the utilization rate of the idle space inside the pump body 100, and further improves the conveying efficiency and conveying stability of the liquid medium in the internal cavity 103 of the pump body 100 by the screws 1. It effectively reduces the long-term retention and accumulation of the liquid medium inside the pump body 100, ensures the timely delivery of the liquid medium in the corresponding time period, and reduces the phenomenon of liquid medium condensation or even deterioration. At the same time, the setting of the corrugated guide surface 2 at the corresponding position can also improve the structural compactness between the internal cavity 103 of the pump body 100 and the screws 1 and the sealing effect inside the cavity 103, thereby improving the working efficiency and working stability of this twin-screw pump body.

[0020] The inner wall of the pump body 100's internal cavity 103 has several uniformly arranged corrugated guide surfaces 2 forming a corrugated sleeve structure. The corrugated sleeve is detachably mounted on the corresponding inner wall of the pump body 100's internal cavity 103. (See also...) Figure 4 As shown, the corrugated sleeve structure is formed by several uniformly arranged corrugated guide surfaces 2 on the inner wall of the internal cavity 103 of the pump body 100. On the one hand, it can improve the overall structural compactness and stability of the corrugated guide surfaces 2; on the other hand, the corrugated sleeve structure can be adapted to the inner wall of the corresponding cavity 103 through the detachable structure of the pump body 100, which facilitates installation, disassembly, cleaning, and replacement. With the corresponding screw 1 in the cavity 103, the screw 1 can be adapted to the corresponding model according to different usage requirements, ensuring that the highest point of the arc surface of the corrugated guide surface 2 on the corrugated sleeve is in contact with the highest point of the arc surface, thereby improving the flexibility and convenience during use and meeting different usage requirements.

[0021] The corrugated sleeve is made of a flexible material with a certain elastic strength. The corrugated sleeve can be made of a flexible material with a certain elastic strength according to the usage requirements. The corrugated sleeve made of flexible material, together with several corrugated guide surfaces 2 evenly arranged on it, can further improve the structural adaptability and fit between the corresponding helical surface 12 on the screw 1 and the corrugated guide surface 2. At the same time, it can also effectively reduce the wear degree of the corresponding helical surface 12 on the corrugated sleeve 21 during the rotation of the screw 1, and improve the sealing performance of the internal cavity 103 of the pump body 100 and the conveying efficiency of the internal liquid medium.

[0022] The pump body 100 has an internal mounting cavity 103 for two sets of screws 1 and an external adapter housing 104, which are arranged in a connected double-cylinder structure. See details for further information. Figure 1 As shown, the double-cylinder structure of the internal cavity 103 of the pump body 100 and its corresponding external housing 104 further improves the structural compatibility and compactness between the screw 1 and the internal cavity 103 of the pump body 100, effectively reduces the occurrence of cavities in the internal cavity 103, and further improves the utilization rate of the effective space of the internal cavity 103 of the pump body 100, thereby improving the conveying effect and efficiency of the liquid medium in the cavity 103.

[0023] The liquid inlet 101 and liquid outlet 102 are respectively provided at corresponding positions on the top and side of the housing 104, from which... Figure 1 or Figure 3As can be seen, the position setting method of the corresponding liquid inlet 101 and liquid outlet 102, combined with the installation method of the screw 1 in the internal cavity 103 of the pump body 100, can further improve the movement space of the liquid medium through the internal cavity 103 of the pump body 100 and the conveying effect through the screw 1 in the cavity 103. At the same time, the opening direction of the corresponding liquid inlet 101 and liquid outlet 102 can meet different installation requirements and usage environments, improving applicability and practicality.

[0024] See Figure 4 The screw 1 has grooves 121 arranged around its helical surface 12. Multiple sets of grooves 121 are evenly arranged along the central axis of the screw 1. The matching arrangement of multiple sets of grooves 121 on the helical surface 12 of the screw 1 can further improve the conveying effect of the screw 1 on the liquid medium in the internal cavity 103 of the pump body 100, further increase the contact area between the helical surface 12 and the liquid medium in the cavity 103, and the grooves 121 on the helical surface 12 of the screw 1 during rotation can also trap and separate the corresponding particles of the appropriate size in the liquid medium, which facilitates subsequent cleaning and can also appropriately reduce the damage to the helical surface 12 of the screw 1.

[0025] The above description in this specification is merely illustrative of the present invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not depart from the content of this specification or exceed the scope defined in the claims, all of which shall fall within the protection scope of this invention.

Claims

1. A sealed twin-screw pump, comprising a pump body, an inlet and an outlet provided thereon, and a twin-screw pump body formed by two sets of meshing screws rotatably mounted on corresponding shafts within the cavity between the inlet and outlet, characterized in that: The cavity inner wall of the adapter screw is provided with several uniformly arranged corrugated guide surfaces, and the highest point of the arc surface of the corrugated guide surface is in contact with the outer wall surface of the corresponding helical structure on the screw.

2. The sealed twin-screw pump according to claim 1, characterized in that: The inner wall of the pump body has several uniformly arranged corrugated guide surfaces forming a corrugated sleeve structure. The corrugated sleeve is installed on the corresponding inner wall of the pump body through a detachable structure.

3. The sealed twin-screw pump according to claim 2, characterized in that: The corrugated sleeve is made of a flexible material with a certain elastic strength.

4. The sealed twin-screw pump according to claim 1, characterized in that: The pump body has an internal mounting cavity for two sets of screws and an external adapter shell structure that is connected in a double-cylinder shape.

5. The sealed twin-screw pump according to claim 4, characterized in that: The liquid inlet and liquid outlet are respectively located at corresponding positions on the top and side of the housing.

6. The sealed twin-screw pump according to claim 1, characterized in that: The screw has grooves circumferentially formed on its helical surface, and multiple sets of these grooves are evenly arranged along the central axis of the screw.

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