CN215763423U

CN215763423U - Urea three-way single-seat reversing cut-off valve

Info

Publication number: CN215763423U
Application number: CN202023340456.2U
Authority: CN
Inventors: 夏小磊; 雷自彬; 曾子伟
Original assignee: Chengdu Sijie Chemical Machinery Co ltd
Current assignee: Chengdu Sijie Chemical Machinery Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-02-08
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a urea three-way single-seat reversing cut-off valve, which is used for improving the three-way single-seat reversing cut-off valve and belongs to the technical field of valves; the valve comprises a valve body, a lower valve body, a valve core, a valve rod and a valve cover, wherein an inlet flow passage and a first outlet flow passage are formed in the valve body, a second outlet flow passage is formed in the lower valve body, a central passage is formed in the middle of the valve cover in a penetrating mode, the upper end of the valve rod penetrates out of the central passage and is connected with an actuator, a guide sleeve is arranged between the valve rod and the central passage, a guide circle is arranged at the lower portion of the valve core, a first sealing surface sealed with the valve core is arranged on the valve body, and a second sealing surface sealed with the lower valve body is arranged at the lower portion of the valve core; the valve provided by the utility model can effectively avoid the fracture of the valve rod, prevent crystallization, is easy to maintain, has good corrosion resistance, long service life and low manufacturing cost.

Description

Urea three-way single-seat reversing cut-off valve

Technical Field

A urea tee joint single-seat reversing cut-off valve is used for improving the tee joint single-seat reversing cut-off valve and belongs to the technical field of valves.

Background

The urea production device is provided with one to two urea three-way single-seat reversing cut-off valves, the valve positions are special and severe, a plurality of manufacturers consider the import as the main part, but still have some problems, the valve rod is easy to break due to improper guiding parts of valve cores of the imported three-way single-seat reversing cut-off valves, most of the imported three-way single-seat reversing cut-off valves are made of casting materials, the performance of the casting materials is poor, the corrosion phenomenon is easy to cause by media, and the urea production device is not suitable for long-period operation; and many three-way single-seat reversing shut-off valves are in threaded connection with valve seats, and the connection of the threads is corroded by a medium for a long period, so that the threads are easy to loosen and fall off, and the phenomenon of stopping is caused in severe cases; meanwhile, when the valve is used, the temperature of a medium almost reaches the temperature when urine is crystallized, the crystallization phenomenon is easily caused, and the phenomenon that the valve does not work is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims to: the urea three-way single-seat reversing cut-off valve can effectively avoid valve rod fracture and crystallization, is easy to maintain, and has good valve corrosion resistance, long service life and low manufacturing cost.

The technical scheme adopted by the utility model is as follows:

in order to achieve the purpose, the utility model provides a urea three-way single-seat reversing cut-off valve which comprises a valve body, a lower valve body, a valve core, a valve rod and a valve cover, wherein an inlet flow channel and a first outlet flow channel are formed in the valve body, a second outlet flow channel is formed in the lower valve body, a central channel is formed in the middle of the valve cover in a penetrating mode, the upper end of the valve rod penetrates out of the central channel and is connected with an actuator, a guide sleeve is arranged between the valve rod and the central channel, a guide circle is arranged at the lower portion of the valve core, a first sealing surface sealed with the valve core is arranged on the valve body, and a second sealing surface sealed with the lower valve body is arranged at the lower portion of the valve core.

Preferably, a valve body flow passage is arranged on the valve body, and a valve core flow passage is arranged on the valve core.

Preferably, the lower end of the valve cover is provided with a sinking part, the central channel penetrates through the sinking part, and a cavity is arranged between the sinking part and the valve body.

Preferably, a packing assembly is further disposed between the valve stem and the central passage.

Preferably, the packing assembly comprises a sealing packing, a gland and a pressure plate, the guide sleeve and the sealing packing are arranged in multiple layers at intervals, the gland is arranged at the top end of the central channel, and the pressure plate is pressed above the gland and fixed on the valve cover through bolts.

Preferably, the lower part of the valve body is connected with the lower valve body through a bolt, and the valve cover is connected with the upper part of the valve body through a bolt.

Preferably, the valve core and the valve rod are integrally forged and formed, and the valve body and the lower valve body are integrally forged and formed.

In summary, due to the adoption of the technical scheme, the utility model has the beneficial effects that:

1. according to the utility model, the upper end and the lower end of the valve core are respectively provided with the guide sleeve and the guide circle as the guide parts, so that the central points of all parts of the valve are ensured to be on the same central point, the stable operation of the valve is ensured, the upper guide part and the lower guide part are more stable than the original guide part, and the guide parts can be arranged to avoid the fracture phenomenon of the valve core.

2. According to the utility model, the sealing property between the valve seat and the valve core can be improved by arranging the first sealing surface and the second sealing surface, and the valve core valve rod, the valve body and the lower valve body are integrally formed by forging, so that the performance of materials is ensured, and the corrosion resistance of the valve is improved.

3. According to the utility model, the sunken part is arranged at the lower end of the valve cover, and the fluid medium can be contacted with the packing assembly of the sunken part in the flowing process to play a role in heat preservation on the packing assembly, so that the temperature in the central channel is higher than the crystallization point of the fluid medium, the valve rod is prevented from being locked by crystallization in the central channel, a steam heat preservation jacket is prevented from being additionally arranged to achieve the heat preservation effect, and the cost is reduced.

Drawings

The utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of the utility model at A in FIG. 1;

FIG. 3 is a partial schematic view taken from section B-B shown in FIG. 1;

fig. 4 is a partial schematic view taken from section C-C shown in fig. 3.

Labeled as: 1-valve body, 101-inlet channel, 102-first outlet channel, 103-first sealing surface, 104-valve body channel, 2-lower valve body, 201-second outlet channel, 3-valve core, 301-valve core channel, 302-second sealing surface, 4-guide circle, 5-valve rod, 6-valve cover, 601-sunken part, 602-central channel, 603-cavity, 7-packing component, 701-sealing packing, 702-gland, 703-pressure plate, and 8-guide sleeve.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1, the embodiment provides a urea three-way single-seat reversing cut-off valve, which includes a valve body 1, a lower valve body 2, a valve core 3, a valve rod 5 and a valve cover 6, wherein the lower portion of the valve body 1 is connected with the lower valve body 2 through a bolt, the valve cover 6 is connected with the upper portion of the valve body 1 through a bolt, and is convenient to detach and install by adopting the bolt, valve seats are processed inside the valve body 1 and the lower valve body 2, the valve core 3 is arranged in the valve seat, the valve body 1 is provided with an inlet flow passage 101, a first outlet flow passage 102 and a valve body flow passage 104, the valve body flow passage 104 is communicated with the first outlet flow passage 102, the lower valve body 2 is provided with a second outlet flow passage 201, the valve core 3 is provided with a valve core flow passage 301, the valve core flow passage 301 is communicated with the second outlet flow passage 201, the middle portion of the valve cover 6 is provided with a central passage 602 in a penetrating manner, the upper end of the valve rod 5 is connected with an actuator, a guide sleeve 8 is arranged between the valve rod 5 and the central channel 602, and a guide circle 4 is arranged at the lower part of the valve core 3;

the valve core 3 and the valve rod 5 are integrally forged and formed, the valve body 1 is integrally forged and formed, a first sealing surface 103 sealed with the valve core 3 is arranged on the valve body 1, and a second sealing surface 302 sealed with the lower valve body 2 is arranged at the lower part of the valve core 3.

In the embodiment, the valve rod 5 and the valve core 3 are driven by the actuator to move up and down, so that the first outlet flow channel 102 and the second outlet flow channel 201 are controlled to be opened and closed, the valve is controlled, the guide sleeve 8 and the guide circle 4 are respectively arranged at the upper end and the lower end of the valve core 3 to serve as guide parts, the central points of all parts of the valve are ensured to be on the same central point, the valve is ensured to operate stably, the upper guide part and the lower guide part are more stable than the original guide parts, and the guide parts can prevent the valve core 3 from being broken; through the setting of first sealed face 103 and second sealed face 302, can improve the leakproofness between disk seat and the case 3, valve body 1 and lower valve body 2 are the forging forming as a whole, can guarantee the performance of material, improve corrosion resisting property, and valve body 1 and lower valve body 2 material and valve internals equal grade material further guarantee sealed not corroded.

Example 2

In this embodiment, it is further preferable that in the basic mountain of embodiment 1, the lower end of the valve cover 6 is provided with a sinking portion 601, the central channel 602 penetrates through the sinking portion 601, a cavity 603 is provided between the sinking portion 601 and the valve body 1, and a medium flows in through the cavity 603 to insulate the upper end of the packing assembly 7; a packing component 7 is arranged between the valve rod 5 and the central passage 602, and the valve rod 5 can be sealed by arranging the packing component 7 in the central passage 602; the packing assembly 7 comprises a sealing packing 701, a pressing cover 702 and a pressing plate 703, the guide sleeve 8 and the sealing packing 701 are arranged at intervals in multiple layers, the pressing cover 703 is arranged at the top end of the central channel 602, the pressing plate 703 is pressed above the pressing cover 702 and fixed on the valve cover 6 through bolts, and the pressing cover 702 is tightly pressed in the central channel 602 through the pressing plate 703, so that the guide sleeve 8 and the sealing packing 701 are tightly pressed in the central channel 602, the leakage of a fluid medium is prevented, and meanwhile, the guide sleeve 8 is fixed.

In this embodiment, through setting up the portion 601 that sinks at valve gap 6 lower extreme, fluid medium can play the heat preservation effect with the portion 601 that sinks at the flow in-process, fills simultaneously in cavity 603 to packing subassembly 7 to the temperature in making central channel 602 is higher than the crystallization point of fluid medium, avoids producing the crystallization locking valve rod 5 in the central channel 602, has avoided installing additional steam heat preservation jacket to reach the heat preservation effect, thereby the cost is reduced.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.

Claims

1. The utility model provides a urea tee bend single seat switching-over trip valve, includes valve body (1), lower valve body (2), case (3), valve rod (5) and valve gap (6), its characterized in that, import runner (101) and first export runner (102) have been seted up on valve body (1), set up second export runner (201) down on valve body (2), valve gap (6) middle part is run through and is seted up central passageway (602), central passageway (602) link to each other with the executor is worn out to valve rod (5) upper end, be provided with uide bushing (8) between valve rod (5) and central passageway (602), case (3) lower part is equipped with direction circle (4), be equipped with on valve body (1) with case (3) sealed first sealed face (103), case (3) lower part is equipped with the sealed face (302) of second of valve body (2) down.

2. The urea three-way single-seat reversing cutoff valve according to claim 1, characterized in that a valve body runner (104) is further arranged on the valve body (1), and a valve core runner (301) is arranged on the valve core (3).

3. A urea three-way single-seat reversing cut-off valve according to claim 2, characterized in that the lower end of the valve cover (6) is provided with a sinking portion (601), the central channel (602) penetrates through the sinking portion (601), and a cavity (603) is arranged between the sinking portion (601) and the valve body (1).

4. A three-way single-seat reversing shut-off valve for urea according to claim 1, characterized in that a packing assembly (7) is further arranged between the valve rod (5) and the central channel (602).

5. A urea three-way single-seat reversing cutoff valve according to claim 4, characterized in that the packing assembly (7) comprises a sealing packing (701), a gland (702) and a pressure plate (703), the guide sleeve (8) and the sealing packing (701) are arranged in multiple layers at intervals, the gland (702) is arranged at the top end of the central channel (602), and the pressure plate (703) is pressed above the gland (702) and fixed on the valve cover (6) through bolts.

6. A urea three-way single-seat reversing cut-off valve according to claim 1, characterized in that the lower part of the valve body (1) is connected with the lower valve body (2) through a bolt, and the valve cover (6) is connected with the upper part of the valve body (1) through a bolt.

7. The urea three-way single-seat reversing cutoff valve according to claim 1, characterized in that the valve core (3) and the valve rod (5) are forged and formed integrally, and the valve body (1) and the lower valve body (2) are both forged and formed integrally.