A screw dry vacuum pump end cover structure

Abstract

The utility model provides an end cover structure, which belongs to the technical field of screw dry vacuum pump equipment, and particularly relates to an end cover structure of a screw dry vacuum pump. The structure is connected to a connecting structure inside an outer shell and is movably connected to the screw to fix the position of a column screw. A connecting ring sleeved on the outside of the screw is used to assist the rotation of the screw, and further ensure the stability of the screw during operation. A sealing plug corresponding to the connecting ring is provided at the other end of the connecting ring to form a sealing environment between the connecting ring and the outer shell. The sealing plug is formed into a one-way plug by means of a spring. The sealing effect is further ensured by means of the internal and external air pressure difference of the vacuum pump. At the same time, a rubber plug 12 is provided in the mounting hole to ensure the air tightness of the connection, thereby solving the problem that the existing end cover structure lacks a certain degree of sealing while strengthening the protection capability.

Description

Technical Field

[0001] The utility model provides an end cover structure, belongs to the technical field of screw dry vacuum pump equipment, and particularly relates to an end cover structure of a screw dry vacuum pump. Background Art

[0002] The dry screw vacuum pump is an exhaust device that uses a pair of screws to rotate synchronously at high speed in opposite directions in the pump housing to produce suction and exhaust effects. It can extract gases containing a large amount of water vapor and a small amount of dust, has a higher ultimate vacuum, consumes less power, and has the advantages of energy saving and maintenance-free. The vacuum pump is mainly composed of front and rear end covers, pump body, screw and other structural parts. The end cover of the screw dry vacuum pump integrates multiple functions in design. Its main functions include ensuring the sealing of the pump cavity and preventing internal medium leakage; at the same time, the end cover is also responsible for supporting and fixing the screw and related components to ensure that the pump remains stable during operation. The design of the end cover can also effectively prevent external pollutants from entering the pump cavity, protect the working environment of the pump, and ensure that its performance is not affected by pollution.

[0003] Publication No.: CN219993934U discloses a screw dry vacuum pump end cover structure, including a cover body, a plurality of mounting holes are penetrated on one side of the cover body, a plurality of inner reinforcing ribs are fixedly connected to the inner side of the cover body, a plurality of outer reinforcing ribs are fixedly connected to the outer side of the cover body, two thickening seats are fixedly connected to the cover body, a plurality of protective covers are fixedly connected to the outer side of the cover body, a sealing gasket is clamped on the inner side of the cover body, a plurality of connecting seats are fixedly connected to the inner side of the cover body, and a positioning pin is inserted in the connecting seat. Although the above structure increases the protection capability of the end cover, the sealing effect is not good because it is only fixedly connected by the positioning pin. Utility Model Content

[0004] In order to make up for the deficiencies of the prior art, the embodiments of the present application provide a screw dry vacuum pump end cover structure, thereby solving the problem that the existing end cover structure lacks a certain degree of sealing while enhancing the protection capability.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a screw dry vacuum pump end cover structure, including an outer shell, the interior of the outer shell is provided with a connecting structure corresponding to the screw, the connecting structure includes a connecting ring which is sleeved on the outside of the screw and is symmetrically distributed, a sealing plug is connected to the side of the outer shell away from the connecting structure through a plurality of springs, mounting holes that penetrate the outer shell are provided on both sides of the connecting ring, and symmetrically distributed rubber plugs are provided inside the mounting holes.

[0006] Preferably: a protective shell sleeved on the outside of the sealing plug is provided on the side of the outer shell away from the connecting ring, and earrings placed in the outer shell are fixedly connected to both sides of the protective shell, and the earrings are provided with connecting holes penetrating the earrings and corresponding to the mounting holes.

[0007] Preferably: the rubber plug is inserted into the mounting hole and the connecting hole from both sides of the outer shell respectively, a thread groove corresponding to the bolt structure is provided inside the rubber plug, and an engaging groove corresponding to the earring is provided on the outer shell.

[0008] Preferably: a movable groove connected to the engaging groove is provided on one side of the sealing plug close to the outer shell, a connecting ring is inserted into the movable groove and fixedly connected to the side wall of the movable groove, a plurality of evenly distributed grooves corresponding to the tension spring are provided in one end of the movable ring close to the sealing plug, and the sealing plug is tightly attached to the movable ring and corresponds to it.

[0009] Preferably: an auxiliary ring corresponding to the screw is provided inside the connecting ring, and the auxiliary ring is connected to a number of evenly distributed balls through limiting plates on both sides of the auxiliary ring, the width of the limiting plates is smaller than the auxiliary ring, and the connecting ring and the limiting plate are provided with sliding grooves corresponding to the balls on one side close to the balls, and the connecting ring is externally sleeved with a fixed frame placed inside the outer shell, and a triangular support piece corresponding to the outer shell is connected to one end of the fixed frame close to the inner wall of the outer shell.

[0010] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0011] The utility model is used to fix the position of the column screw by movably connecting the connecting structure and the screw inside the outer shell, and assists the rotation of the screw with the help of a connecting ring sleeved on the outside of the screw, and further ensures the stability of the screw during operation; a sealing plug corresponding to itself is provided at the other end of the connecting ring, forming a sealed environment between itself and the outer shell, and the sealing plug is formed into a one-way plug with the help of a spring, and the sealing effect is further ensured by the internal and external air pressure difference of the vacuum pump, and a rubber plug 12 is provided in the mounting hole to ensure the air tightness of the connection.

[0012] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and study, or may be taught from the practice of the present invention to some extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of an end cover structure of a screw dry vacuum pump of the utility model;

[0014] Figure 2 This is an exploded view of an end cover structure of a screw dry vacuum pump of the utility model;

[0015] Figure 3 It is an exploded view of another perspective of the end cover structure of a screw dry vacuum pump of the utility model;

[0016] Figure 4The utility model is a cross-sectional view of a connecting ring of an end cover structure of a screw dry vacuum pump.

[0017] As shown in the figure:

[0018] 1. Outer shell;

[0019] 11. Mounting hole; 12. Rubber plug; 13. Protective shell; 14. Earring; 15. Connecting hole; 16. Threaded groove; 17. Fitting groove; 18. Movable groove;

[0020] 2. Connection structure;

[0021] 21. Connecting ring; 22. Tension spring; 23. Sealing plug; 24. Groove; 25. Auxiliary ring; 26. Limiting plate; 27. Ball bearing; 28. Fixed frame; 29. ​​Support member. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention; the terms used in the specification of the present invention are only for the purpose of describing specific implementation methods and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0025] like Figure 1 and Figure 2As shown, a screw dry vacuum pump end cover structure comprises an outer shell 1, a connecting structure 2 corresponding to the screw is arranged inside the outer shell 1, the connecting structure 2 comprises a connecting ring 21 which is sleeved on the outside of the screw and symmetrically distributed, an auxiliary ring 25 corresponding to the screw is arranged inside the connecting ring 21, the auxiliary ring 25 is connected with a plurality of evenly distributed balls 27 through limiting plates 26 on both sides thereof, the limiting plates 26 have a width smaller than the auxiliary ring 25, the connecting ring 21 and the limiting plates 26 are provided with sliding grooves corresponding to the balls 27 on one side close to the balls 27, a fixing frame 28 arranged inside the outer shell 1 is sleeved on the outside of the connecting ring 21, a triangular support member 29 corresponding to the outer shell 1 is connected to one end of the fixing frame 28 close to the inner wall of the outer shell 1, a sealing plug 23 is connected to the side of the outer shell 1 away from the connecting structure 2 through a plurality of springs 22, mounting holes 11 penetrating the outer shell 1 are arranged on both sides of the connecting ring 21, and symmetrically distributed rubber plugs 12 are arranged inside the mounting holes 11

[0026] In the present embodiment, a connecting structure 2 arranged inside the outer shell 1 is movably connected to the screw to fix the position of the column screw, and a connecting ring 21 sleeved on the outside of the screw assists the rotation of the screw, while further ensuring the stability of the screw during operation; a sealing plug 23 corresponding to itself is provided at the other end of the connecting ring 21, forming a sealed environment between itself and the outer shell 1, and a spring 22 is used to make the sealing plug 23 a one-way plug, and the sealing effect is further ensured by the internal and external air pressure difference of the vacuum pump, and a rubber plug 12 is provided in the mounting hole 11 to ensure the airtightness of the connection.

[0027] like Figure 3 and Figure 4 As shown, the outer shell 1 is provided with a protective shell 13 installed on the outside of the sealing plug 23 on the side away from the connecting ring 21, and the two sides of the protective shell 13 are fixedly connected to the inside of the outer shell 1 through earrings 14. The earrings 14 are provided with connecting holes 15 that penetrate the earrings themselves and correspond to the mounting holes 11. The rubber plugs 12 are inserted into the mounting holes 11 and the connecting holes 15 from both sides of the outer shell 1, and the rubber plugs 12 are provided with threaded grooves 16 that match the bolt structure. The outer shell 1 also has an engaging groove 17 corresponding to the earrings 14. The sealing plug 23 is provided with a movable groove 18 that is connected to the engaging groove 17 on the side close to the outer shell 1, and the connecting ring 21 is inserted into the movable groove 18 and fixedly connected to the side wall of the movable groove 18. The movable ring 21 is provided with a plurality of evenly distributed grooves 24 at one end close to the sealing plug 23 for installing springs corresponding to the tension springs 22, and the sealing plug 23 is tightly attached to the movable ring 21 and matched with it.

[0028] In this embodiment, the mounting hole 11 is not limited to the earring 14. The mounting method of the connection between the device and the pump body is provided with a mounting hole 11, and a rubber plug 12 is provided in the mounting hole 11. This structure is an example of the connection method of this structure; the spring 22 is placed inside the groove 24, and the sealing plug 23 is tightened to fit the connecting ring 21, and is compressed by the internal and external air pressure difference.

[0029] When using:

[0030] 1. Initial Installation:

[0031] The outer shell 1 is prepared and fixed at a designated position.

[0032] The connection structure 2 is placed inside the outer shell 1 so that it corresponds to the screw rod and is movably connected to ensure that the position of the screw rod is fixed.

[0033] The connecting ring 21 is sleeved on the outside of the screw and adjusted to be symmetrically distributed to assist the rotation of the screw to ensure its stability during operation.

[0034] 2. Sealing structure installation:

[0035] A sealing plug 23 is installed at the other end of the connecting ring 21 and connected to the outer shell 1 through a plurality of springs 22 to form a sealed environment.

[0036] Ensure that the sealing plug 23 forms a one-way plug through the internal and external air pressure difference of the vacuum pump to enhance the sealing effect.

[0037] Symmetrically distributed rubber plugs 12 are inserted into the mounting holes 11 to ensure the airtightness of the connection.

[0038] 3. Protective shell installation:

[0039] The protective shell 13 is sleeved on the outside of the sealing plug 23 , and two sides of the protective shell 13 are fixedly connected to the earrings 14 in the outer shell 1 .

[0040] Ensure that the connection hole 15 on the protective shell 13 is aligned with the mounting hole 11 and fixed by inserting the rubber plug 12, and the rubber plug 12 is provided with a thread groove 16 corresponding to the bolt structure.

[0041] 4. Final Adjustment:

[0042] The connecting ring 21 is inserted into the movable groove 18 and fixedly connected to the side wall of the movable groove 18 .

[0043] A plurality of evenly distributed grooves 24 are provided inside one end of the movable ring 21 close to the sealing plug 23 for mounting the spring 22 and tightening the sealing plug 23 to make it close to the connecting ring 21 .

[0044] Check all connections and sealing parts to ensure that the installation and fixation of the entire end cover structure meet the design requirements and the sealing performance is good to ensure the normal operation of the screw dry vacuum pump.

[0045] Through the above steps, the utility model realizes efficient installation and reliable sealing of the end cover structure of the screw dry vacuum pump, ensuring that it remains stable and efficient during operation.

[0046] Although the present invention has been disclosed as above in terms of preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the technology may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be based on the definition of the claims.

Claims

1. A screw dry vacuum pump end cover structure, comprising an outer shell (1), characterized in that: The outer shell (1) is provided with a connection structure (2) corresponding to the screw rod inside, the connection structure (2) comprises a connection ring (21) sleeved on the outside of the screw rod and symmetrically distributed, a sealing plug (23) is connected to the side of the outer shell (1) away from the connection structure (2) via a plurality of tension springs (22), mounting holes (11) penetrating the outer shell (1) are provided on both sides of the connection ring (21), and symmetrically distributed rubber plugs (12) are provided inside the mounting hole (11).

2. The end cover structure of a screw dry vacuum pump according to claim 1, characterized in that: A protective shell (13) sleeved on the outside of the sealing plug (23) is provided on the side of the outer shell (1) facing away from the connecting ring (21), and earrings (14) disposed in the outer shell (1) are fixedly connected to both sides of the protective shell (13), and a connecting hole (15) penetrating the earring (14) and corresponding to the mounting hole (11) is provided on the earring (14).

3. The end cover structure of a screw dry vacuum pump according to claim 2, characterized in that: The rubber plug (12) is respectively inserted into the mounting hole (11) and the connecting hole (15) from both sides of the outer shell (1); a threaded groove (16) corresponding to the bolt structure is provided inside the rubber plug (12); and an engaging groove (17) corresponding to the earring (14) is provided on the outer shell (1).

4. The end cover structure of a screw dry vacuum pump according to claim 3, characterized in that: The sealing plug (23) is provided with a movable groove (18) connected to the engaging groove (17) on one side close to the outer shell (1); the connecting ring (21) is inserted into the movable groove (18) and fixedly connected to the side wall of the movable groove (18); a plurality of evenly distributed grooves (24) corresponding to the tension spring (22) are provided in one end of the connecting ring (21) close to the sealing plug (23); the sealing plug (23) is tightly attached to the connecting ring (21) and corresponds to it.

5. The end cover structure of a screw dry vacuum pump according to claim 1, characterized in that: An auxiliary ring (25) corresponding to the screw rod is arranged inside the connecting ring (21); the auxiliary ring (25) is connected to a plurality of evenly distributed balls (27) via limiting plates (26) on both sides thereof; the limiting plates (26) are smaller in width than the auxiliary ring (25); a sliding groove corresponding to the balls (27) is arranged on one side of the connecting ring (21) and the limiting plates (26) close to the balls (27); a fixed frame (28) arranged inside the outer shell (1) is sleeved on the outside of the connecting ring (21); a triangular support member (29) corresponding to the outer shell (1) is connected to one end of the fixed frame (28) close to the inner wall of the outer shell (1).

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