Deslagging valve at bottom of dehydration tank

Abstract

The utility model provides a dewatering tank bottom slag discharging valve which comprises a valve seat, a valve shell and a driving device which are horizontally arranged in sequence, and the valve shell is fixedly connected with the valve seat and the driving device. The valve seat is arranged at the bottom of the dehydration tank in a matched mode, two solid sealing rings are arranged in the valve seat up and down, and the two sealing rings are tightly attached to each other; a valve plate matched with the valve seat is horizontally arranged in the valve shell, the plate head side of the valve plate is provided with an inclined face used for separately inserting the two sealing rings, and the valve plate is used for entering and exiting the valve seat to open and close the valve seat. The output end of the driving device is fixedly connected with the tail side of the valve plate, and the driving device is used for driving the valve plate to enter and exit from the valve seat to open and close the valve. The slag discharge valve is good in sealing performance, compact in structure and stable in operation.

Description

Technical Field

[0001] The utility model relates to the technical field of delayed coking and closed coke removal in the petrochemical industry, and particularly relates to a bottom slag discharge valve of a dehydration tank. Background Technique

[0002] The tank-type closed coke removal and dehydration technology is a brand-new oil coke closed dehydration and transportation technology, which is mainly applied to new / transformed oil coke projects. In view of the increasingly strict environmental protection requirements for oil refining at home and abroad, the existing open-air operation projects in operation urgently need to be upgraded and transformed. The tank-type closed technology has greatly improved the on-site operation environment and solved the environmental protection-related problems at the source. However, due to the influence of the height and size of the coke removal tower in the existing projects, the flat slag discharge valve has emerged with its stable working state and compact volume structure, especially small size in the height direction. It is suitable for various project layout requirements, especially the existing petrochemical transformation projects.

[0003] The slag discharge valve is horizontally installed between the dehydration tank and the discharging machine, and is used in combination with the dehydration tank and the discharging machine to complete the relevant process requirements of oil coke dehydration and transportation. The slag discharge valve is in a closed state during coke removal, and it is necessary to ensure a certain height of buffer water for the falling of the oil coke stored inside the dehydration tank; after the coke removal is completed and the water filtration of the dehydration tank ends, the slag discharge valve is opened to transport the oil coke material.

[0004] At present, the slag discharge valves on the market are large in volume, poor in sealing performance and serious in leakage, low in service life. The sealing rings are mostly hollow annular air bags, and the air is inflated into the air bags to achieve the sealing function; the sealing force is greatly affected by other external factors such as the deformation of the air bags, and the air bags are easily scratched by the materials; the valve plate cannot stop at any position, and the material transportation flow control cannot be realized. Therefore, it is necessary to develop a new slag discharge valve with good sealing performance, compact structure and stable operation. Content of the Utility Model

[0005] The purpose of the utility model is to provide a bottom slag discharge valve of a dehydration tank, which can ensure good sealing performance, compact structure and stable operation of the slag discharge valve.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is: a bottom slag discharge valve of a dehydration tank, which includes a valve seat, a valve housing and a driving device arranged horizontally in sequence, and the valve housing is fixedly connected with the valve seat and the driving device;

[0007] The valve seat is matched and arranged at the bottom of the dehydration tank, and two solid sealing rings are arranged up and down in the valve seat, and the two sealing rings are tightly attached to each other;

[0008] A valve plate matched with the valve seat is horizontally arranged in the valve housing, and an inclined surface for separating and inserting the two sealing rings is arranged on the head side of the valve plate, and the valve plate is used for entering and exiting the valve seat to open and close the valve;

[0009] The output end of the driving device is fixedly connected to the tail side of the valve plate, and the driving device is used to drive the valve plate to enter and exit the valve seat to open and close the valve.

[0010] Preferably, a plurality of flushing ports connected to flushing pipelines are provided on the side and lower part of the valve seat and the valve housing, and the flushing ports are used to flush and clean the valve plate when opening and closing the valve; a flushing water interface is provided in the valve seat and the valve housing.

[0011] Preferably, a plurality of suspension assemblies connected to the dehydration tank are provided on the tail of the valve housing, one end of the suspension assembly is hinged to a reserved hole at the tail of the valve housing, and the other end is welded to the dehydration tank.

[0012] Preferably, the sealing ring is made of corrosion-resistant rubber.

[0013] Preferably, the driving device is an electro-hydraulic push rod, a cylinder, a hydraulic cylinder or a lead screw, and a displacement sensor for detecting the extension length of the output end thereof is provided on the driving device.

[0014] Preferably, an observation window for facilitating maintenance and observing the state of the valve plate is provided on the valve housing.

[0015] Preferably, guide blocks for guiding the direction of movement of the valve plate are provided on both sides of the valve seat.

[0016] Preferably, a support ring for supporting the valve plate to ensure that the valve plate is centered in the height direction is provided inside the valve seat.

[0017] Preferably, an upper pressing ring and a lower pressing ring are respectively provided above and below the two sealing rings on the valve seat.

[0018] Preferably, a wear-resistant ring is integrally provided at one end of the upper pressing ring close to the sealing ring.

[0019] The beneficial effects of the present utility model are as follows:

[0020] 1. In this solution, two solid sealing rings are provided up and down in the valve seat, and the two sealing rings are closely attached to each other. A valve plate matching the valve seat is horizontally provided in the valve housing. An inclined surface for separating and inserting the two sealing rings is provided on the head side of the valve plate, and the valve plate is used to enter and exit the valve seat to open and close the valve. During the valve closing process, the inclined surface at the front end of the valve plate squeezes the upper and lower sealing rings, causing the sealing rings to undergo plastic deformation; after the valve closing is in place, the sealing rings are closely attached to the valve plate plane, realizing the sealing of the slag discharge valve. After the slag discharge valve is fully opened, the valve plate is separated from the sealing ring, and the upper and lower two sealing rings expand to make up for the height difference of the valve plate, while ensuring the tightness of the material passage. Sealing is achieved by using the material characteristics of the sealing ring itself without additional sealing force; consequently, the sealing ring has a long service life, simple maintenance, and good sealing effect. It ensures that the slag discharge valve has good sealing performance, compact structure, and stable operation.

[0021] 2. The structure of this slag discharge valve is compact, especially the compression of the dimension in the height direction, which greatly improves the situation of limited height of the dehydration tank in the renovation project.

[0022] 3. This solution drives the valve plate through the driving device to complete the switching of the opening and closing states of the slag discharge valve, supplemented by the signal feedback of the displacement sensor, making the valve position of the valve controllable and the adjustment convenient and intuitive.

[0023] 4. This slag discharge valve is connected to the dehydration tank through the suspension assembly, which plays an auxiliary role in supporting the slag discharge valve. At the same time, the slag discharge valve and the dehydration tank form an integral body, effectively avoiding the relative position offset between equipment caused by the thermal expansion and contraction of the dehydration tank.

[0024] 5. The upper pressure ring of this solution is integrally provided with a protective wear-resistant ring, which can effectively reduce the wear of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the present invention.

[0027] Figure 2 It is a top view of the present invention.

[0028] In the figure, 1. valve seat, 2. sealing ring, 3. lower pressure ring, 4. upper pressure ring, 5. support ring, 6. valve plate, 7. valve housing, 8. driving device, 9. suspension assembly, 10. flushing port, 11. observation window, 12. guiding block, 13. dehydration tank. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The following will further elaborate on the present invention in detail in conjunction with the drawings and specific embodiments.

[0030] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention.

[0031] Meanwhile, it should be noted that: Unless otherwise defined, the technical terms or scientific terms used in this article should have the ordinary meaning understood by those with general skills in the technical field to which this utility model belongs. The meaning of "a plurality of" used in the specification and claims of this utility model patent application is two or more; the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "front end", "rear end", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to this utility model. The change or adjustment of its relative relationship, without substantial change in technical content, should also be regarded as the scope in which this utility model can be implemented.

[0032] The following further describes this utility model in detail with reference to the embodiments and the accompanying drawings.

[0033] This utility model discloses a bottom slag discharge valve for a dehydration tank. As Figure 1 , 2 shown, the embodiment includes a valve seat 1, a valve housing 7, and a driving device 8 arranged horizontally in sequence. The valve housing 7 is fixedly connected to the valve seat 1 and the driving device 8. A plurality of suspension assemblies 9 connected to the dehydration tank 13 are provided at the tail of the valve housing 7. One end of the suspension assembly 9 is hinged to a reserved hole at the tail of the valve housing 7, and the other end is welded to the dehydration tank 13. The suspension assembly 9 plays a role in assisting the support of the slag discharge valve. At the same time, the slag discharge valve and the dehydration tank 13 form an integral body, effectively avoiding the relative position offset between equipment caused by the thermal expansion and contraction of the dehydration tank 13.

[0034] The valve seat 1 is fitted at the bottom of the dehydration tank 13. Two solid sealing rings 2 are arranged up and down inside the valve seat 1, and the two sealing rings 2 are closely fitted. The material of the sealing ring 2 is corrosion-resistant rubber, and reliable sealing is achieved through the plastic deformation of the sealing ring 2 to closely fit with the valve plate 6, without additional sealing power. It has good plasticity and a long service life. The valve seat 1 is provided with an upper pressure ring 4 and a lower pressure ring 3 above and below the two sealing rings 2 respectively. An abrasion-resistant ring is integrally provided at one end of the upper pressure ring 4 close to the sealing ring 2, which can effectively reduce the wear of the sealing ring 2.

[0035] A valve plate 6 matching the valve seat 1 is horizontally arranged inside the valve housing 7. A slope for separating and inserting the two sealing rings 2 is provided on the head side of the valve plate 6. The valve plate 6 is used to enter and exit the valve seat 1 to open and close the valve. The sealing surface of the valve plate 6 is hardened to improve the sealing performance and service life. Guide blocks 12 for guiding the operation direction of the valve plate 6 are provided on both sides of the valve seat 1. A support ring 5 for supporting the valve plate 6 to ensure that the valve plate 6 is centered in the height direction is arranged inside the valve seat 1.

[0036] An observation window 11 for facilitating maintenance and observing the state of the valve plate 6 is provided on the valve housing 7. A plurality of flushing ports 10 connected to flushing pipelines are provided on the side and lower part of the valve seat 1 and the valve housing 7. The flushing ports 10 are used to flush and clean the valve plate 6 when the valve is opened and closed. Flushing and cleaning when the valve is opened and closed can maintain a clean working environment for the valve plate 6 and reduce the friction force during the operation of the valve plate 6. A flushing water interface is provided inside the valve seat 1 and the valve housing 7.

[0037] The output end of the driving device 8 is fixedly connected to the tail side of the valve plate 6. The driving device 8 is used to drive the valve plate 6 in and out of the valve seat 1 to open and close the valve. The driving device 8 is an electro-hydraulic push rod, a cylinder, a hydraulic cylinder or a lead screw. The driving device is connected to the valve plate 6 and is used to drive the valve plate 6 to move back and forth to complete the switching of the opening and closing states of the slag discharge valve. A displacement sensor for detecting the extension length of the output end is provided on the driving device 8. It can real-time feedback the valve opening, and the valve plate 6 can stop at any position. Using an integrated hydraulic station to drive multiple slag discharge valves simultaneously has high layout space utilization rate and is energy-saving and efficient.

[0038] When the utility model works, in the closed state of the slag discharge valve, the valve plate 6 is closely attached to the sealing ring 2 to form a good seal, which is convenient for the water storage tank 13 to store water for decoking operation; in the fully open / half-open state of the slag discharge valve, it is controlled that the materials in the water storage tank 13 can be smoothly discharged as required.

[0039] During the adjustment process of the slag discharge valve, the valve plate 6 realizes horizontal linear reciprocating motion under the guidance of the guide block 12 and the support ring 5 to complete the valve opening and closing actions; during the valve closing process, the front end inclined surface of the valve plate 6 squeezes the sealing rings 2 on the upper and lower sides, causing the sealing rings 2 to undergo plastic deformation; after the valve closing is in place, the sealing rings 2 are closely attached to the plane of the valve plate 6 to achieve the sealing of the slag discharge valve. During the valve opening process, fine materials will enter the inside of the valve seat 1 and the valve housing 7 through the gap between the sealing ring 2 and the valve plate 6, and the flushing port 10 cleans the inside of the slag discharge valve to ensure the cleanliness of the surface of the valve plate 6, thereby realizing smooth valve closing; the cleaning water comes from a clean water source, and the waste water goes to the flushing water interface for collection, which is convenient for collection and recycling. After the slag discharge valve is fully opened, the valve plate 6 is separated from the sealing ring 2, and the upper and lower two sealing rings 2 expand to make up for the height difference of the valve plate 6, while ensuring the tightness of the material passage.

[0040] It should be noted that the parts not described in detail in the above embodiments are all prior art.

[0041] The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can, within the scope of the technical solution of the present utility model, make some changes or modifications to the above-disclosed technical content to obtain equivalent embodiments with equivalent changes. However, as long as it does not depart from the technical solution content of the present utility model, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model shall be covered by the protection scope of the present utility model.

Claims

1. A bottom slag discharge valve for a dehydration tank, characterized in that: It includes a valve seat (1), a valve housing (7) and a driving device (8) arranged horizontally in sequence. The valve housing (7) is fixedly connected to the valve seat (1) and the driving device (8). The valve seat (1) is correspondingly arranged at the bottom of the dehydration tank (13). Two solid sealing rings (2) are arranged vertically inside the valve seat (1), and the two sealing rings (2) are closely attached to each other. A valve plate (6) matching the valve seat (1) is horizontally arranged inside the valve housing (7). An inclined surface for separately inserting the two sealing rings (2) is arranged on the head side of the valve plate (6). The valve plate (6) is used to enter and exit the valve seat (1) to open and close the valve. The output end of the driving device (8) is fixedly connected to the tail side of the valve plate (6). The driving device (8) is used to drive the valve plate (6) to enter and exit the valve seat (1) to open and close the valve.

2. The bottom slag discharge valve of the dehydration tank according to claim 1, characterized in that: A plurality of flush ports (10) connected to flush pipes are arranged on the side and lower part of the valve seat (1) and the valve housing (7). The flush ports (10) are used to flush the valve plate (6) when opening and closing the valve. A flush water interface is arranged inside the valve seat (1) and the valve housing (7).

3. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: A plurality of suspension assemblies (9) connected to the dehydration tank (13) are arranged on the tail of the valve housing (7). One end of the suspension assembly (9) is hinged to a reserved hole at the tail of the valve housing (7), and the other end is welded to the dehydration tank (13).

4. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: The material of the sealing ring (2) is corrosion-resistant rubber.

5. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: The driving device (8) is an electro-hydraulic push rod, a cylinder, a hydraulic cylinder or a lead screw. A displacement sensor for detecting the extension length of its output end is arranged on the driving device (8).

6. The bottom slag discharge valve of a dehydrating tank according to claim 1, characterized in that: An observation window (11) for facilitating maintenance and observing the state of the valve plate (6) is arranged on the valve housing (7).

7. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: Guide blocks (12) for guiding the operation direction of the valve plate (6) are arranged on both sides of the valve seat (1).

8. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: A support ring (5) for supporting the valve plate (6) to ensure that the valve plate (6) is centered in the height direction is arranged inside the valve seat (1).

9. The bottom slag discharge valve of a dehydration tank according to claim 1, characterized in that: Upper pressure rings (4) and lower pressure rings (3) are respectively arranged above and below the two sealing rings (2) on the valve seat (1).

10. The bottom slag discharge valve of a dehydration tank according to claim 9, characterized in that: A wear-resistant ring is integrally arranged at one end of the upper pressure ring (4) close to the sealing ring (2).

Images