Low-temperature immersed pump bottom valve

Abstract

The utility model discloses a bottom valve of a low-temperature immersed pump. The bottom valve comprises a valve body, a valve core, a connecting bolt, a nut and a spring, the valve body and the valve element are fixedly connected through the connecting bolt, and the spring is arranged on the connecting bolt in a sleeving mode and compressed through the nut. The valve body comprises a valve main body and a sealing joint; the sealing joint is arranged on the outer side of the bottom of the valve main body; the valve element comprises an element body, a sealing assembly and a sealing pressing piece. The sealing assembly is arranged on the core body in a sleeving mode and arranged on the inner side of the connecting bolt in a surrounding mode, and the sealing pressing piece is fixedly pressed on the sealing assembly. When the immersed pump is put down and lifted up, linkage closing of the valve plates is achieved, and operation and maintenance of the low-temperature immersed pump are facilitated.

Description

Technical Field

[0001] This utility model relates to the technical field of cryogenic tank submersible pump devices, and in particular to a cryogenic submersible pump bottom valve. Background Technology

[0002] The foot valve is a base device used to install a cryogenic submersible pump. The cryogenic submersible pump is a moving device that transports cryogenic media in a storage tank. The operation, maintenance, and upkeep of the cryogenic submersible pump are all related to the structure of the foot valve.

[0003] To prevent the cryogenic submersible pump from rotating during operation, to prevent media from entering, and to ensure safer removal of the pump from the well for maintenance, many improvements have been made to the structure of the foot valve. Utility Model Content

[0004] To solve the above problems, this utility model provides a cryogenic submersible pump foot valve, the specific technical solution of which is as follows:

[0005] The foot valve includes a valve body, valve core, connecting bolts, nuts, and spring;

[0006] The valve body and valve core are connected by a connecting bolt, and the spring is sleeved on the connecting bolt and compressed by a nut.

[0007] The valve body includes a valve body and a sealing joint, wherein the sealing joint is located on the bottom outer side of the valve body;

[0008] The valve core includes a core body, a sealing assembly, and a sealing pressure member; the sealing assembly is sleeved on the core body and surrounds the inner side of the connecting bolt, and the sealing pressure member is fixedly pressed onto the sealing assembly.

[0009] Furthermore, the connecting bolts are evenly distributed around the outside of the valve body.

[0010] Furthermore, one end of the connecting bolt is fixedly connected to the valve core, and the other end passes through the bottom of the valve body and is connected to the nut.

[0011] Furthermore, the nut is located on the upper end of the spring along the axis of the connecting bolt, and the top end face of the nut is provided with a stop pin protrusion that is evenly surrounding the connecting bolt.

[0012] Furthermore, a pin is fixedly connected to the upper side of the connecting bolt, the axis of the pin is perpendicular to the axis of the connecting bolt, and the pin passes through the protrusions of the retaining pin.

[0013] Furthermore, the valve core also includes a balancing valve, which is located on one side of the flow channel of the core body.

[0014] Furthermore, the sealing pressure member is used to fix the sealing assembly onto the valve core body using fixing bolts.

[0015] Furthermore, the valve body has several bolt through holes on its top sealing surface.

[0016] Furthermore, the valve body also includes an anti-rotation column, which is uniformly arranged around the inner side of the valve body, and the valve body and the anti-rotation column are fixedly connected.

[0017] The beneficial effects of this utility model are as follows:

[0018] The bottom valve structure of this utility model includes a valve body, a valve core, bolts, nuts, and springs. The valve body and valve core are connected by bolts with springs sleeved on them. The entire bottom valve device is directly connected to the flange at the bottom of the cryogenic storage tank pump well by bolts. The cryogenic submersible pump is placed directly on the bottom valve, with the sealing surface of the pump in contact with the sealing surface of the bottom valve device. The pump inlet is in contact with the valve core of the bottom valve device, and the flow channel of the valve core is directly connected to the pump inlet. When the submersible pump is lowered, the bottom valve plate opens under the weight of the submersible pump, connecting the submersible pump to the storage tank. When the submersible pump is raised, the bottom valve plate closes under the elastic force of the stainless steel spring, sealing and isolating the pump well from the storage tank. This effectively prevents the medium inside the storage tank from entering the pump well and leaking into the environment, ensuring the safety of the storage tank site during submersible pump maintenance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the valve body structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the valve core structure of this utility model.

[0021] Figure 3 This is an enlarged schematic diagram of the pin part of this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1-valve body, 101-valve main body, 102-anti-rotation column, 103-sealing joint, 2-valve core, 201-core body, 202-sealing assembly, 203-sealing pressure component, 3-connecting bolt, 4-nut, 5-spring, 6-pin, 7-blocking pin protrusion, 8-balance valve, 9-bolt through hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the utility model product is in use. These are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Example 1

[0027] Embodiment 1 of this utility model discloses a bottom valve for a cryogenic submersible pump, such as Figure 1 As shown, the specific structure is as follows:

[0028] The bottom valve includes a valve body 1, a valve core 2, a connecting bolt 3, a nut 4, and a spring 5;

[0029] The valve body 1 and the valve core 2 are connected by a connecting bolt 3. The spring 5 is sleeved on the connecting bolt 3, and the bottom end of the spring 5 is placed on the upper end of the sealing joint 103 of the valve body 1 and compressed by the nut 4.

[0030] In a preferred embodiment, one end of the connecting bolt 3 is fixedly connected to the valve core 2, and the other end passes through the bottom of the valve body 1 and is connected to the nut 4; that is, the connecting bolt 3 passes through the sealing joint 103 of the valve body 1 and is movably connected to the valve core 2 by the spring 5.

[0031] Specifically, the connecting bolts 3 are evenly distributed around the outside of the valve body 101.

[0032] The valve body 1 includes a valve body 101 and a sealing joint 103, wherein the sealing joint 103 is located on the outer side of the bottom of the valve body 101;

[0033] like Figure 2 As shown, the valve core 2 includes a core body 201, a sealing assembly 202, and a sealing pressure member 203; the sealing assembly 202 is sleeved on the core body 201 and surrounds the inner side of the connecting bolt 3, and the sealing pressure member 203 is fixedly pressed on the sealing assembly 202.

[0034] Specifically, the sealing pressure member 203 fixes the sealing assembly 202 onto the valve core 2 body by fixing bolts.

[0035] In a preferred embodiment, the nut 4 is disposed at the upper end of the spring 5 along the axis of the connecting bolt 3, such as... Figure 3 As shown, the top end face of the nut 4 is provided with a locking pin protrusion 7 that is evenly surrounding the connecting bolt 3;

[0036] A pin 6 is also fixedly connected to the upper side of the connecting bolt 3. The axis of the pin 6 is perpendicular to the axis of the connecting bolt 3, and the pin 6 passes through the anti-pin protrusions 7.

[0037] In a preferred embodiment, the valve body 101 has several bolt through holes 9 on its top sealing surface.

[0038] Based on the above-mentioned bottom valve structure, after the submersible pump is installed, it is placed above the valve core 2. When the spring 5 is compressed, the valve core 2 (bottom valve plate) opens under the weight of the submersible pump, connecting the submersible pump to the storage tank. The pump body and the bottom valve body 1 are sealed using a planar and conical structure, isolating the pump well from the storage tank and ensuring the efficient operation of the submersible pump. Specifically, the planar and conical structure means that the upper surface of the valve core 2 is in planar contact with the inlet surface of the submersible pump, and the conical surface of the valve body 1 is sealed with the conical surface on the inlet volute of the submersible pump.

[0039] When the submersible pump needs maintenance, lifting the pump causes spring 5 to extend, and the bottom valve plate closes under the elastic force of the stainless steel spring 5, sealing and isolating the pump well from the storage tank. This effectively prevents the medium inside the storage tank from entering the pump well and leaking into the environment, ensuring the safety of the storage tank site during submersible pump maintenance.

[0040] Example 2

[0041] Embodiment 2 of this utility model discloses a bottom valve for a cryogenic submersible pump, such as Figure 1 As shown, the specific structure is as follows:

[0042] The bottom valve includes a valve body 1, a valve core 2, a connecting bolt 3, a nut 4, and a spring 5;

[0043] The valve body 1 and the valve core 2 are fixedly connected by a connecting bolt 3, and the spring 5 is sleeved on the connecting bolt 3 and compressed by a nut 4.

[0044] Specifically, the connecting bolts 3 are evenly distributed around the outside of the valve body 101.

[0045] The valve body 1 includes a valve body 101 and a sealing joint 103, wherein the sealing joint 103 is located on the outer side of the bottom of the valve body 101;

[0046] like Figure 2 As shown, the valve core 2 includes a core body 201, a sealing assembly 202, and a sealing pressure member 203; the sealing assembly 202 is sleeved on the core body 201 and surrounds the inner side of the connecting bolt 3, and the sealing pressure member 203 is fixedly pressed on the sealing assembly 202.

[0047] Specifically, the sealing pressure member 203 fixes the sealing assembly 202 onto the valve core 2 body by fixing bolts.

[0048] In a preferred embodiment, the nut 4 is disposed at the upper end of the spring 5 along the axis of the connecting bolt 3, such as... Figure 3 As shown, the top end face of the nut 4 is provided with a locking pin protrusion 7 that is evenly surrounding the connecting bolt 3;

[0049] A pin 6 is also fixedly connected to the upper side of the connecting bolt 3. The axis of the pin 6 is perpendicular to the axis of the connecting bolt 3, and the pin 6 passes through the anti-pin protrusions 7.

[0050] As a preferred embodiment, combined with Figure 2 As shown, the valve core 2 also includes a balance valve 8, which is located on one side of the flow channel of the core body 201.

[0051] In a preferred embodiment, the valve body 101 has several bolt through holes 9 on its top sealing surface.

[0052] Based on the above-mentioned bottom valve structure, after the submersible pump is installed, it is placed above the valve core 2. When the spring 5 is compressed, the valve core 2 (bottom valve plate) opens under the weight of the submersible pump, connecting the submersible pump to the storage tank. The pump body and the bottom valve body 1 are sealed using a planar and conical structure, isolating the pump well from the storage tank and ensuring the efficient operation of the submersible pump. Specifically, the planar and conical structure means that the upper surface of the valve core 2 is in planar contact with the inlet surface of the submersible pump, and the conical surface of the valve body 1 is sealed with the conical surface on the inlet volute of the submersible pump.

[0053] When the submersible pump needs maintenance, lifting the pump causes spring 5 to extend, and the bottom valve plate closes under the elastic force of the stainless steel spring 5, sealing and isolating the pump well from the storage tank. This effectively prevents the medium inside the storage tank from entering the pump well and leaking into the environment, ensuring the safety of the storage tank site during submersible pump maintenance.

[0054] Example 3

[0055] Embodiment 3 of this utility model discloses a bottom valve for a cryogenic submersible pump, such as Figure 1 As shown, the specific structure is as follows:

[0056] The bottom valve includes a valve body 1, a valve core 2, a connecting bolt 3, a nut 4, and a spring 5;

[0057] The valve body 1 and the valve core 2 are fixedly connected by a connecting bolt 3, and the spring 5 is sleeved on the connecting bolt 3 and compressed by a nut 4.

[0058] Specifically, the connecting bolts 3 are evenly distributed around the outside of the valve body 101.

[0059] The valve body 1 includes a valve body 101 and a sealing joint 103, wherein the sealing joint 103 is located on the outer side of the bottom of the valve body 101;

[0060] like Figure 2 As shown, the valve core 2 includes a core body 201, a sealing assembly 202, and a sealing pressure member 203; the sealing assembly 202 is sleeved on the core body 201 and surrounds the inner side of the connecting bolt 3, and the sealing pressure member 203 is fixedly pressed on the sealing assembly 202.

[0061] Specifically, the sealing pressure member 203 fixes the sealing assembly 202 onto the valve core 2 body by fixing bolts.

[0062] In a preferred embodiment, the nut 4 is disposed at the upper end of the spring 5 along the axis of the connecting bolt 3, such as... Figure 3 As shown, the top end face of the nut 4 is provided with a locking pin protrusion 7 that is evenly surrounding the connecting bolt 3;

[0063] A pin 6 is also fixedly connected to the upper side of the connecting bolt 3. The axis of the pin 6 is perpendicular to the axis of the connecting bolt 3, and the pin 6 passes through the anti-pin protrusions 7.

[0064] As a preferred embodiment, combined with Figure 2 As shown, the valve core 2 also includes a balance valve 8, which is located on one side of the flow channel of the core body 201.

[0065] In a preferred embodiment, the valve body 101 has several bolt through holes 9 on its top sealing surface.

[0066] As a preferred embodiment, combined with Figure 1 As shown, the valve body 1 also includes an anti-rotation column 102, which is uniformly arranged around the inner side of the valve body 101. The valve body 101 and the anti-rotation column 102 are fixedly connected by welding.

[0067] The anti-rotation column 102 on the valve body 101 and the anti-rotation claw on the submersible pump mutually block each other, preventing the submersible pump from rotating relative to the pump well during operation, thus ensuring the reliability of the submersible pump operation.

[0068] Based on the above-mentioned bottom valve structure, after the submersible pump is installed, it is placed above the valve core 2. When the spring 5 is compressed, the valve core 2 (bottom valve plate) opens under the weight of the submersible pump, connecting the submersible pump to the storage tank. The pump body and the bottom valve body 1 are sealed using a planar and conical structure, isolating the pump well from the storage tank and ensuring the efficient operation of the submersible pump. Specifically, the planar and conical structure means that the upper surface of the valve core 2 is in planar contact with the inlet surface of the submersible pump, and the conical surface of the valve body 1 is sealed with the conical surface on the inlet volute of the submersible pump.

[0069] When the submersible pump needs maintenance, lifting the pump causes spring 5 to extend, and the bottom valve plate closes under the elastic force of the stainless steel spring 5, sealing and isolating the pump well from the storage tank. This effectively prevents the medium inside the storage tank from entering the pump well and leaking into the environment, ensuring the safety of the storage tank site during submersible pump maintenance.

[0070] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A cryogenic submersible pump foot valve, characterized in that, The foot valve includes a valve body, valve core, connecting bolts, nuts, and spring; The valve body and valve core are connected by a connecting bolt, and the spring is sleeved on the connecting bolt and compressed by a nut. The valve body includes a valve body and a sealing joint, wherein the sealing joint is located on the bottom outer side of the valve body; The valve core includes a core body, a sealing assembly, and a sealing pressure member; the sealing assembly is sleeved on the core body and surrounds the inner side of the connecting bolt, and the sealing pressure member is fixedly pressed onto the sealing assembly.

2. The cryogenic submersible pump bottom valve according to claim 1, characterized in that, The connecting bolts are evenly distributed around the outside of the valve body.

3. The cryogenic submersible pump bottom valve according to claim 2, characterized in that, One end of the connecting bolt is fixedly connected to the valve core, and the other end passes through the bottom of the valve body and is connected to the nut.

4. The cryogenic submersible pump bottom valve according to claim 2, characterized in that, The nut is located on the upper end of the spring along the axis of the connecting bolt, and the top end face of the nut is provided with a stop pin protrusion that is evenly surrounding the connecting bolt.

5. The cryogenic submersible pump foot valve according to claim 4, characterized in that, A pin is also fixedly connected to the upper side of the connecting bolt. The axis of the pin is perpendicular to the axis of the connecting bolt, and the pin passes through the protrusions of the stop pin.

6. The cryogenic submersible pump bottom valve according to claim 1, characterized in that, The valve core also includes a balancing valve, which is located on one side of the flow channel of the core body.

7. The cryogenic submersible pump bottom valve according to claim 1, characterized in that, The sealing pressure member is used to fix the sealing assembly onto the valve core body by fixing bolts.

8. The cryogenic submersible pump foot valve according to claim 1, characterized in that, The valve body has several bolt through holes on its top sealing surface.

9. The cryogenic submersible pump foot valve according to claim 1, characterized in that, The valve body also includes an anti-rotation column, which is uniformly arranged around the inner side of the valve body, and the valve body and the anti-rotation column are fixedly connected.

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