Leak-proof structure of cryogenic liquid pump

Abstract

The utility model relates to the technical field of liquid pumps, in particular to a low-temperature liquid pump leakproof structure which comprises a lower flange plate, a first through hole is formed in the outer side ring of the outer wall of the lower flange plate in a penetrating mode, a base is welded to the bottom end wall of the lower flange plate, and a pump pipe is arranged on the bottom end wall of the base. A sealing gasket is movably placed at the top end of the lower flange plate, and a second through hole is formed in the outer side ring of the sealing gasket in a penetrating mode. And a third through hole is formed in the outer side ring of the outer wall of the upper flange plate in a penetrating mode, a conveying pipe is arranged on the top end wall of the upper flange plate, a threaded top seat is arranged on the bottom end wall of the upper flange plate, and bolts are inserted into the third through hole, the second through hole and the first through hole in a penetrating mode. A unique sealing structure is adopted to achieve the long-time stable and reliable sealing effect, the device is reasonable in structural design and easy and convenient to install and maintain, the operation cost and maintenance difficulty of a system can be remarkably reduced, the safety and stability of the system can be effectively improved, and leakage accidents are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid pumps, in particular to a low-temperature liquid pump leakage prevention structure. Background Art

[0002] In the cryogenic liquid delivery system, the connection between the cryogenic liquid pump and the pipeline is the key link to ensure the stable operation of the system and prevent liquid leakage. However, due to the special properties of cryogenic liquids, such as changes in material properties at low temperatures, high viscosity of liquids and possible phase changes, flange connections have become a high-incidence area for leakage accidents. Traditional flange connection sealing methods, such as gasket sealing and threaded sealing, often have problems such as unstable sealing effects and easy aging and failure when dealing with cryogenic liquids, which leads to leakage accidents, which not only affects the normal operation of the system, but also may threaten the environment and personnel safety.

[0003] In order to solve the above problems, domestic and foreign researchers and technicians have conducted a lot of research and development work and proposed a variety of anti-leakage devices and sealing technologies. However, most of the existing anti-leakage devices have shortcomings such as complex structure, difficult maintenance, and unsatisfactory sealing effect, which makes it difficult to meet the requirements of cryogenic liquid transportation systems for efficient, stable and reliable sealing.

[0004] In this context, the present invention proposes a new type of anti-leakage device for connecting a cryogenic liquid pump to a pipeline flange, which aims to improve the sealing performance between the cryogenic liquid pump and the pipeline by optimizing the connection structure and sealing method, reduce the occurrence of leakage accidents, and ensure the safe and stable operation of the system. Utility Model Content

[0005] In order to solve the above problems, the utility model designs a low-temperature liquid pump leakage prevention structure.

[0006] In order to achieve the above technical objectives and the above technical effects, the present invention is implemented through the following technical solutions:

[0007] A cryogenic liquid pump leakage prevention structure, comprising a lower flange, an outer ring of an outer wall of the lower flange having a through hole 1, a base welded to the bottom end wall of the lower flange, a pump pipe arranged on the bottom end wall of the base, a sealing gasket movably placed on the top end of the lower flange, and a through hole 2 arranged on the outer ring of the sealing gasket;

[0008] An upper flange, wherein the outer circle of the outer wall of the upper flange is penetrated with a through hole three, a conveying pipe is provided on the top end wall of the upper flange, a threaded top seat is provided on the bottom end wall of the upper flange, bolts are inserted through the through hole three, through hole two and through hole one, and nuts are threadedly locked on the bottom of the outer wall of the bolts.

[0009] Furthermore, the sealing gasket comprises a circular plate, and a convex seat is provided on the bottom end wall of the circular plate.

[0010] Furthermore, a thread is provided on the inner wall of the convex seat and is matched and connected with the thread of the threaded top seat.

[0011] Furthermore, the circular plate and the convex seat are made of rubber material.

[0012] Furthermore, the number of through hole one, through hole two and through hole three is equal, and their positions are relatively arranged.

[0013] The beneficial effects of the utility model are:

[0014] The utility model adopts a unique sealing structure to achieve a long-term stable and reliable sealing effect. The device has a reasonable structural design and is easy to install and maintain. It can significantly reduce the operating cost and maintenance difficulty of the system. It has important application value in the cryogenic liquid delivery system, can effectively improve the safety and stability of the system, and reduce the occurrence of leakage accidents. It has important market prospects and promotion value. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the main assembly structure of the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Lower flange, 2. Through hole one, 3. Base, 4. Pump pipe, 5. Round plate, 6. Through hole two, 7. Boss, 8. Upper flange, 9. Through hole three, 10. Delivery pipe, 11. Threaded top seat, 12. Bolt, 13. Nut. DETAILED DESCRIPTION

[0020] 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 of 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.

[0021] See also Figure 1-2 As shown, a cryogenic liquid pump leakage prevention structure comprises a lower flange 1, an outer ring of the outer wall of the lower flange 1 is penetrated with a through hole 1 2, a base 3 is welded on the bottom end wall of the lower flange 1, a pump pipe 4 is arranged on the bottom end wall of the base 3, a sealing gasket is movably placed on the top of the lower flange 1, and a through hole 2 6 is penetrated on the outer ring of the sealing gasket;

[0022] The upper flange 8 has a through hole 3 9 formed on the outer circle of the outer wall of the upper flange 8, a delivery pipe 10 is provided on the top wall of the upper flange 8, and a threaded top seat 11 is provided on the bottom wall of the upper flange 8. Bolts 12 are inserted through the through hole 3 9, the through hole 2 6 and the through hole 1 2, and a nut 13 is threadedly locked on the bottom of the outer wall of the bolt 12.

[0023] Furthermore, the sealing gasket includes a circular plate 5, and a boss 7 is provided on the bottom end wall of the circular plate 5. The circular plate 5 drives the boss 7 to be screwed onto the outer wall of the threaded top seat 11, and the fixed sealing between the boss 7 and the threaded top seat 11 is improved by threaded tightening. The circular plate 5 and the boss 7 adopt a three-way sealing operation at the bottom, side wall and top to improve the fixed sealing between the upper flange 8 and the lower flange 1.

[0024] Furthermore, a thread is provided on the inner wall of the boss 7, and is threadedly matched with the threaded top seat 11, and the circular plate 5 drives the boss 7 to be screwed onto the outer wall of the threaded top seat 11, thereby improving the fixed sealing between the boss 7 and the threaded top seat 11 by threaded tightening.

[0025] Furthermore, the circular plate 5 and the boss 7 are made of rubber material, and the circular plate 5 and the boss 7 adopt a three-way sealing operation at the bottom, side wall and top to improve the sealing performance of the fixing between the upper flange 8 and the lower flange 1.

[0026] Furthermore, the number of through holes 1 2, through holes 2 6 and through holes 3 9 is equal and their positions are relatively arranged. The bolt 12 is passed through through holes 3 9, through holes 2 6 and through holes 1 2, and the nut 13 is tightened on the bottom of the outer wall of the bolt 12 to connect and fix the upper flange 8, the circular plate 5 and the lower flange 1.

[0027] The detailed connection means are well-known technologies in the art. All components in this solution are universal standard parts or components known to technicians in this field. The structures and principles are known to technicians in this field through technical manuals or conventional experimental methods.

[0028] A specific application of this embodiment is:

[0029] When in use, the base 3 is welded and installed on the pump pipe 4, and the upper flange 8 is welded and installed on the delivery pipe 10. When the pump pipe 4 and the delivery pipe 10 need to be connected and fixed, the circular plate 5 drives the convex seat 7 to be screwed on the outer wall of the threaded top seat 11, and the sealing performance of the fixing between the convex seat 7 and the threaded top seat 11 is improved by screwing the thread, and the circular plate 5 is fixed under the upper flange 8, and the upper flange 8 drives the threaded top seat 11, the circular plate 5 and the convex seat 7 to sit downward into the lower flange 1 and the base 3, and the convex seat 7 is clamped in the base 3, and the bolt 12 is passed through the through hole three 9, the through hole two 6 and the through hole one 2, and the nut 13 is screwed on the bottom of the outer wall of the bolt 12, and the upper flange 8, the circular plate 5 and the lower flange 1 are connected and fixed. The circular plate 5 and the convex seat 7 adopt a three-way sealing operation of the bottom, the side wall and the top to improve the sealing performance of the fixing between the upper flange 8 and the lower flange 1.

[0030] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Any changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A cryogenic liquid pump anti-leakage structure, characterized in that: include A lower flange (1), wherein the outer ring of the outer wall of the lower flange (1) is penetrated with a through hole 1 (2), a base (3) is welded on the bottom end wall of the lower flange (1), a pump pipe (4) is arranged on the bottom end wall of the base (3), a sealing gasket is movably placed on the top end of the lower flange (1), and a through hole 2 (6) is penetrated on the outer ring of the sealing gasket; An upper flange (8), wherein the outer wall of the upper flange (8) is penetrated by a third through hole (9), the top end wall of the upper flange (8) is provided with a delivery pipe (10), the bottom end wall of the upper flange (8) is provided with a threaded top seat (11), the third through hole (9), the second through hole (6) and the first through hole (2) are penetrated by bolts (12), and the bottom of the outer wall of the bolt (12) is threadedly locked with a nut (13).

2. The cryogenic liquid pump anti-leakage structure according to claim 1, characterized in that: The sealing gasket comprises a circular plate (5), and a convex seat (7) is provided on the bottom end wall of the circular plate (5).

3. A cryogenic liquid pump anti-leakage structure according to claim 2, characterized in that: The inner wall of the convex seat (7) is provided with threads, and is thread-matched and connected with the threaded top seat (11).

4. The cryogenic liquid pump anti-leakage structure according to claim 2, characterized in that: The circular plate (5) and the convex seat (7) are made of rubber material.

5. The cryogenic liquid pump anti-leakage structure according to claim 1, characterized in that: The number of through hole one (2), through hole two (6) and through hole three (9) is equal and their positions are relatively arranged.

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