CN219933010U - Valve with self-cleaning valve rod - Google Patents
Valve with self-cleaning valve rod Download PDFInfo
- Publication number
- CN219933010U CN219933010U CN202321256267.8U CN202321256267U CN219933010U CN 219933010 U CN219933010 U CN 219933010U CN 202321256267 U CN202321256267 U CN 202321256267U CN 219933010 U CN219933010 U CN 219933010U
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- CN
- China
- Prior art keywords
- valve
- cleaning
- self
- sleeve
- valve rod
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004140 cleaning Methods 0.000 title claims abstract description 134
- 238000012856 packing Methods 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 abstract description 7
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000010992 reflux Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 239000000945 filler Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The utility model provides a valve with a self-cleaning valve rod, which comprises a valve body, a valve cover matched with the valve body, a valve rod matched with the valve body and the valve cover, and a valve cavity arranged in the valve body, wherein a self-cleaning assembly is sleeved outside the valve rod and comprises a cleaning sleeve and a cleaning brush, the cleaning sleeve is arranged between the valve rod and the valve cover, the cleaning brush is embedded in the cleaning sleeve, and a backflow hole for communicating the valve cavity to the lower end of the cleaning assembly is arranged between the valve cover and/or the valve body and the valve rod; when warm fluid enters the valve cavity to enable the pressure in the valve cavity to rise, the self-cleaning assembly moves upwards under pressure, after the fluid flows out of the valve cavity, the temperature drop pressure is reduced, the self-cleaning assembly moves downwards, residual fluid on the surfaces of the valve rod and the valve cover is scraped, the valve rod has a self-cleaning function, after the valve rod is cleaned by the self-cleaning assembly, the scraped fluid is quickly discharged, and the service life of the valve is effectively prolonged.
Description
Technical Field
The utility model relates to the technical field of valves, in particular to a valve with a self-cleaning valve rod.
Background
The flowing medium in the pipeline of the urea hydrolysis ammonia producing system is urea solution with the working temperature of 35-65 ℃. When the pipeline is used for medium switching or overhauling, the temperature of the pipeline is reduced to normal temperature, at the moment, the solution remained on the surface of the valve rod of the valve can be crystallized into solid particles, and when the valve rod rotates, the crystallization can damage the filler, so that the sealing of the valve rod is invalid.
Disclosure of Invention
The utility model aims to overcome the defects and shortcomings in the prior art and provide a valve with a self-cleaning valve rod, which adopts the following technical scheme:
the utility model provides a valve of self-cleaning valve rod, includes the valve body, cooperates the valve gap that sets up on the valve body, with valve body and valve gap complex valve rod, set up in the valve pocket in the valve body, its characterized in that: the valve rod overcoat is equipped with self-cleaning subassembly, self-cleaning subassembly includes cleaning sleeve, cleaning brush, cleaning sleeve sets up between valve rod and valve gap, and the cleaning brush inlays and locates in the cleaning sleeve, be provided with the return hole of intercommunication valve pocket to cleaning subassembly lower extreme between valve gap and/or valve body and the valve rod, backward flow Kong Fangbian is from after cleaning the valve rod of cleaning subassembly, makes the liquid of scraping discharge fast.
Preferably, a stuffing box is arranged between the valve cover and the valve rod, the self-cleaning assembly further comprises an elastic piece arranged between the stuffing box and the cleaning sleeve, the elastic piece is in a compressed state when the cleaning sleeve is forced to move upwards, and the elastic force of the elastic piece is larger than the release state when the cleaning sleeve is pushed to move downwards when the lower end of the cleaning sleeve is forced.
Preferably, the self-cleaning assembly further comprises a limiting cylinder arranged between the elastic piece and the valve rod, and the limiting cylinder is sleeved outside the valve rod and is limited between the cleaning sleeve and the stuffing box.
Preferably, the cleaning brush includes a first cleaning brush provided on a contact surface of the cleaning sleeve and the valve stem, and a second cleaning brush provided on a contact surface of the cleaning sleeve and the valve cover.
Preferably, the section of the cleaning sleeve is in an I shape or a king shape, the cleaning sleeve comprises grooves distributed on the inner side and the outer side of the cleaning sleeve, and the cleaning brush is arranged in the grooves.
Preferably, the collecting hole is arranged on the valve cover and above the reflux hole and close to the cleaning sleeve, the collecting hole is arranged on the contact surface of the valve cover and the valve body, and the diameter of the opening close to one end of the cleaning sleeve is larger than that of the opening far away from one end of the cleaning sleeve, so that the collecting hole is in a conical structure.
Preferably, a valve rod positioning cavity is arranged between the valve cover and the valve body, an annular protruding portion limited in the valve rod positioning cavity is arranged on the valve rod, the backflow hole is formed in the annular protruding portion, and a thrust pad is arranged on the contact surface of the annular protruding portion and the valve cover.
Preferably, a valve seat is also arranged in the valve body in a matched manner, and a disc spring is arranged between the valve seat and the valve body; the contact surface of the valve seat and the valve body is provided with a plurality of caulking grooves, and sealing rings are embedded in the caulking grooves.
The beneficial effects of the utility model are as follows: a self-cleaning assembly is arranged between the valve cover and the valve rod, and a reflux hole is cooperatively arranged below the self-cleaning assembly, wherein the self-cleaning assembly comprises a cleaning sleeve and a cleaning brush; the warm fluid enters the valve cavity to enable the pressure in the valve cavity to rise, the self-cleaning assembly moves upwards under pressure, the temperature drop pressure is reduced after the fluid flows out of the valve cavity, the self-cleaning assembly moves downwards, the valve rod has a self-cleaning function, residual fluid on the surfaces of the valve rod and the valve cover is convenient to remove, and after the valve rod is cleaned by the self-cleaning assembly, scraped liquid is quickly discharged, so that the service life of the valve is effectively prolonged.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions of the prior art, the drawings which are required in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the utility model, and that it is within the scope of the utility model to one skilled in the art to obtain other drawings from these drawings without inventive faculty.
FIG. 1 is a schematic overall structure of embodiment 1;
FIG. 2 is an enlarged view of FIG. 1 at A;
FIG. 3 is a schematic view of a self-cleaning assembly according to embodiment 1;
FIG. 4 is an enlarged view at B in FIG. 2;
FIG. 5 is an enlarged view of FIG. 1 at C;
in the figure, 1-handle, 2-gland, 3-packing, 4-packing pad, 5-packing box, 6-valve cover (long neck valve cover), 7-limiting cylinder, 8-elastic piece, 9-cleaning brush, 10-cleaning sleeve, 101-groove, 11-collecting hole, 12-thrust pad, 13-shaft sleeve, 14-reflux hole, 15-valve rod, 151-annular boss, 16-O-shaped ring, 17-disc spring, 18-valve seat, 19-valve core, 20-valve body and 21-valve cavity.
Detailed Description
The present utility model will be described in further detail with reference to the accompanying drawings, for the purpose of making the objects, technical solutions and advantages of the present utility model more apparent.
It should be noted that, in the embodiments of the present utility model, all the expressions "first" and "second" are used to distinguish two entities with the same name but different entities or different parameters, and it is noted that the "first" and "second" are only used for convenience of expression, and should not be construed as limiting the embodiments of the present utility model, and the following embodiments are not described one by one.
The terms of direction and position in the present utility model, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer only to the direction or position of the drawing. Accordingly, directional and positional terms are used to illustrate and understand the utility model and are not intended to limit the scope of the utility model.
Example 1
As shown in fig. 1-5, a valve with a self-cleaning valve rod comprises a valve body 20, a valve cover 6 matched with the valve body 20, a valve rod 15 matched with the valve body 20 and the valve cover 6, and a valve cavity 21 arranged in the valve body 20, and is characterized in that: the self-cleaning assembly is sleeved outside the valve rod 15 and comprises a cleaning sleeve 10 and a cleaning brush 9, the cleaning sleeve 10 is arranged between the valve rod 15 and the valve cover 6, the cleaning brush 9 is embedded in the cleaning sleeve 10, and the cleaning sleeve 10 provides a skeleton supporting function for the cleaning brush 9; a return hole 14 for communicating the valve cavity 21 to the lower end of the cleaning assembly is arranged between the valve cover 6 and/or the valve body 20 and the valve rod 15.
The self-cleaning assembly comprises a valve cover 6, a valve rod 15, a packing box 5, an elastic piece (spring) 8, a cleaning sleeve 10 and a spring 8, wherein the packing box 5 is arranged between the valve cover 6 and the valve rod 15, the elastic piece 8 is in a compressed state when the cleaning sleeve 10 is forced to upwards displace, the elastic force of the elastic piece 8 is larger than the release state when the cleaning sleeve 10 is pushed to downwards displace when the lower end of the cleaning sleeve 10 is forced, and the spring 8 provides power for the return of the cleaning sleeve.
The self-cleaning assembly further comprises a limiting cylinder 7 arranged between the elastic piece 8 and the valve rod 15, the limiting cylinder 7 is sleeved outside the valve rod 15 and limited between the cleaning sleeve 10 and the stuffing box 5, and the protection spring is over-pressed.
The cleaning brush 9 comprises a first cleaning brush 9 arranged on the contact surface of the cleaning sleeve 10 and the valve rod 15 and a second cleaning brush 9 arranged on the contact surface of the cleaning sleeve 10 and the valve cover 6; the rubber cleaning brush is designed inside and outside the cleaning sleeve 10 by the design, the sealing function is realized during pressure bearing, and the residual solution on the surface of the valve rod and the inner wall of the long-neck valve cover is brushed off during pressure loss.
The section of the cleaning sleeve 10 is I-shaped or king-shaped, the cleaning sleeve 10 comprises grooves 101 distributed on the inner side and the outer side of the cleaning sleeve 10, and the cleaning brush 9 is arranged in the grooves 101.
The valve cover 6 is a long-neck valve cover, is positioned above the reflux hole 14 and is close to the cleaning sleeve 10, and the reflux hole has a good drainage effect, so that residual liquid can be conveniently emptied; the collecting hole 11 is formed on the contact surface of the valve cover 6 and the valve body 20, and the diameter of the opening at one end of the collecting hole close to the cleaning sleeve 10 is larger than that at one end of the collecting hole far away from the cleaning sleeve 10.
A valve rod positioning cavity is arranged between the valve cover 6 and the valve body 20, an annular protruding portion 151 limited in the valve rod positioning cavity is arranged on the valve rod 15, the backflow hole 14 is arranged on the annular protruding portion 151, and a thrust pad 12 is arranged on the contact surface between the annular protruding portion 151 and the valve cover 6.
A valve seat 18 is also arranged in the valve body 20 in a matched manner, and a disc spring 17 is arranged between the valve seat 18 and the valve body 20; the contact surface of the valve seat 18 and the valve body 20 is provided with a plurality of caulking grooves, and the caulking grooves are internally embedded with sealing rings 16.
The working principle of this embodiment is as follows:
1. the selected cleaning brush is made of rubber, the applicable temperature is between minus 55 ℃ and 120 ℃, and the cleaning brush is installed and then is in certain compression with the valve rod, the cleaning sleeve and the long-neck valve cover, so that effective sealing under pipeline pressure can be ensured, the solution is isolated from the filler, the damage of solution crystallization to the filler is avoided, and the problem of leakage is solved.
2. When the pipeline starts to work, the solution at 35-65 ℃ enters the valve, the pressure is gradually increased, and the cleaning sleeve moves upwards with the cleaning brush compression spring until the limiting cylinder contacts with the stuffing box; in the process, the cleaning brush is contacted with the solution at the temperature of 35-65 ℃ and sealed, the solution is prevented from entering the spring cavity and the stuffing box,
3. when the pipeline is used for switching the solution or evacuating the solution, the pressure in the valve cavity is reduced, the spring pushes the cleaning sleeve to move downwards, the cleaning brush cleans the residual solution on the surfaces of the valve rod and the inner cavity of the long-neck valve cover, and residual suspension liquid beads are prevented from crystallizing after the temperature is reduced; and the spring is used for dynamically adapting to pressure change, so that stable operation of the valve can be ensured without a control system.
The foregoing disclosure is illustrative of the present utility model and is not to be construed as limiting the scope of the utility model, which is defined by the appended claims.
Claims (9)
1. The utility model provides a valve of self-cleaning valve rod, includes valve body (20), cooperation setting up valve gap (6) on valve body (20), with valve body (20) and valve gap (6) complex valve rod (15), valve pocket (21) set up in valve body (20), its characterized in that: the self-cleaning assembly is sleeved outside the valve rod (15), the self-cleaning assembly comprises a cleaning sleeve (10) and a cleaning brush (9), the cleaning sleeve (10) is arranged between the valve rod (15) and the valve cover (6), the cleaning brush (9) is embedded in the cleaning sleeve (10), and a backflow hole (14) which is communicated with the valve cavity (21) to the lower end of the cleaning assembly is formed between the valve cover (6) and/or the valve body (20) and the valve rod (15).
2. A self-cleaning valve stem valve as defined in claim 1, wherein: be provided with packing box (5) between valve gap (6) and valve rod (15), self-cleaning subassembly is still including setting up elastic component (8) between packing box (5) and cleaning sleeve (10), elastic component (8) have when cleaning sleeve (10) atress upwards displacement compressed compression state to and elastic component (8) elasticity is greater than the release state when cleaning sleeve (10) downward displacement is promoted in the time of cleaning sleeve (10) lower extreme atress.
3. A self-cleaning valve stem valve as defined in claim 2, wherein: the self-cleaning assembly further comprises a limiting cylinder (7) arranged between the elastic piece (8) and the valve rod (15), and the limiting cylinder (7) is sleeved outside the valve rod (15) and limited between the cleaning sleeve (10) and the stuffing box (5).
4. A self-cleaning valve stem valve as defined in claim 1, wherein: the cleaning brush (9) comprises a first cleaning brush (9) arranged on the contact surface of the cleaning sleeve (10) and the valve rod (15) and a second cleaning brush (9) arranged on the contact surface of the cleaning sleeve (10) and the valve cover (6).
5. A self-cleaning valve stem valve as defined in claim 4, wherein: the section of the cleaning sleeve (10) is I-shaped or king-shaped, the cleaning sleeve (10) comprises grooves (101) distributed on the inner side and the outer side of the cleaning sleeve (10), and the cleaning brush (9) is arranged in the grooves (101).
6. A self-cleaning valve stem valve as defined in claim 2, wherein: the valve cover (6) is positioned above the reflow hole (14) and is provided with a collecting hole (11) close to the cleaning sleeve (10), the collecting hole (11) is arranged on the contact surface of the valve cover (6) and the valve body (20), and the opening diameter of one end of the collecting hole close to the cleaning sleeve (10) is larger than that of one end of the collecting hole far away from the cleaning sleeve (10).
7. A self-cleaning valve stem valve as defined in claim 1, wherein: a valve rod positioning cavity is formed between the valve cover (6) and the valve body (20), an annular protruding portion (151) limited in the valve rod positioning cavity is arranged on the valve rod (15), the backflow hole (14) is formed in the annular protruding portion (151), and a thrust pad (12) is arranged on the contact surface of the annular protruding portion (151) and the valve cover (6).
8. A self-cleaning valve stem valve as defined in claim 1, wherein: a valve seat (18) is also arranged in the valve body (20) in a matched mode, and a disc spring (17) is arranged between the valve seat (18) and the valve body (20).
9. A self-cleaning valve stem valve as defined in claim 8, wherein: the contact surface of the valve seat (18) and the valve body (20) is provided with a plurality of caulking grooves, and sealing rings (16) are embedded in the caulking grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321256267.8U CN219933010U (en) | 2023-05-20 | 2023-05-20 | Valve with self-cleaning valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321256267.8U CN219933010U (en) | 2023-05-20 | 2023-05-20 | Valve with self-cleaning valve rod |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219933010U true CN219933010U (en) | 2023-10-31 |
Family
ID=88502953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321256267.8U Active CN219933010U (en) | 2023-05-20 | 2023-05-20 | Valve with self-cleaning valve rod |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219933010U (en) |
-
2023
- 2023-05-20 CN CN202321256267.8U patent/CN219933010U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |