CN215980823U

CN215980823U - Urea high-pressure manual valve

Info

Publication number: CN215980823U
Application number: CN202023334941.9U
Authority: CN
Inventors: 夏小磊; 张红梅; 曾子伟
Original assignee: Chengdu Sijie Chemical Machinery Co ltd
Current assignee: Chengdu Sijie Chemical Machinery Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2022-03-08
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a urea high-pressure manual valve, which relates to the technical field of high-pressure manual valves and comprises a valve body, a valve core, a stuffing box, a sealing structure and a bracket, wherein the sealing structure is formed by the contact surface between the valve body and the stuffing box; the stuffing box is sleeved on the valve core, a stuffing box assembly is arranged between the stuffing box and the valve core, a support is clamped on the outer side of the stuffing box, and the support is fixed on the valve body through a bolt assembly. The utility model effectively solves the problems of large processing difficulty, poor sealing effect, high cost, poor secondary assembly, easy leakage, more parts and the like in the using and manufacturing processes of the urea high-pressure manual valve, and prolongs the service life of the urea high-pressure manual valve.

Description

Urea high-pressure manual valve

Technical Field

The utility model relates to the technical field of high-pressure manual valves, in particular to a urea high-pressure manual valve.

Background

Urea, also known as carbamide (carbamide), has the formula CH₄N₂O, an organic compound consisting of carbon, nitrogen, oxygen and hydrogen, is a white crystal, is one of the simplest organic compounds, is a main nitrogen-containing end product of protein metabolic decomposition in mammals and certain fishes, and is a nitrogen fertilizer with the highest nitrogen content at present.

The high-pressure manual regulating valve for urea has strong corrosivity in the using environment, the frequency of maintenance and repair of the valve is greatly improved under the working condition of a special environment for a long time, the high-pressure manual regulating valve for urea needs to be disassembled and then reassembled in the maintenance process, the condition that secondary assembly is not in place easily occurs, the valve is easy to cause poor sealing, the phenomenon of leakage is generated, and a production system is directly influenced in serious conditions.

A lot of manufacturers still use traditional concave surface seal structure and traditional plane and add gasket seal structure now, and the concave surface seal structure processing degree of difficulty is big, and machining efficiency is low, and is with high costs, and the plane adds that the gasket seals required spare part is more, and the processing degree of difficulty is big, influences machining efficiency, and the assembly degree of difficulty increases, and is with high costs.

In summary, the existing urea high-pressure manual valve has the defects of high processing difficulty, poor sealing effect, high cost, poor secondary assembly, easy leakage, more parts and the like, shortens the service life of the whole valve, and is not beneficial to production.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides the urea high-pressure manual valve, which effectively solves the problems of high processing difficulty, poor sealing effect, high cost, poor secondary assembly, easy leakage, more parts and the like in the using and manufacturing processes of the urea high-pressure manual valve, and prolongs the service life of the urea high-pressure manual valve.

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

a urea high-pressure manual valve comprises a valve body, a valve core, a packing box, a sealing structure and a support, wherein a contact surface between the valve body and the packing box forms the sealing structure; the stuffing box is sleeved on the valve core, a stuffing box assembly is arranged between the stuffing box and the valve core, a support is clamped on the outer side of the stuffing box, and the support is fixed on the valve body through a bolt assembly.

Furthermore, the included angle between the oblique conical surface of the valve body and the horizontal plane in the tangent plane direction along the vertical center line of the valve core is 20 degrees, and the midpoint of the spherical sealing surface in the tangent plane direction along the vertical center line of the valve core is coincided with the contact surface of the valve body.

Furthermore, the middle point of the spherical sealing surface in the tangent plane direction along the vertical center line of the valve core coincides with the middle point of the oblique conical surface in the tangent plane direction along the vertical center line of the valve core.

Furthermore, the lower part of the inner side of the packing box is matched and sleeved with the valve core, the position between the upper middle part of the inner side of the packing box and the valve core is in a cylindrical ring cavity shape, and the packing box assembly is matched and arranged in the cylindrical ring cavity shape between the upper middle part of the inner side of the packing box and the valve core.

Furthermore, a groove is formed in the bottom side of the contact surface of the bracket and the stuffing box, and a protrusion matched with the groove is formed in the middle lower portion of the outer side of the stuffing box.

Furthermore, a guide part is arranged on the bottom side of the stuffing box, and a guide hole matched with the guide part is formed in the valve body.

The utility model has the beneficial effects that:

1. the utility model has simple structure and convenient and accurate disassembly and assembly, when in disassembly, the bolt assembly between the valve body and the bracket is loosened, and other parts can be quickly disassembled and taken out; during secondary assembly, the groove on the support, the bulge matched with the groove on the stuffing box, the guide part on the bottom side of the stuffing box and the guide hole matched with the guide part on the valve body can well control the assembling resilience, and the oblique conical surface is tightly contacted with the spherical sealing surface 14 by screwing the bolt assembly between the support and the valve body and enabling the valve core to move up and down, so that the sealing effect is achieved.

2. The utility model has the advantages of easy and convenient processing and high processing precision, and the processing difficulty is easier, the size is easier to control and the control is more accurate compared with the concave surface processing when the contact surface of the valve body 1 is a plane or the contact surface of the stuffing box is a spherical sealing surface during production and processing.

3. The utility model has low manufacturing cost and processing cost, and in the aspect of cost, because the traditional sealing gasket, the traditional outer corner pad and the traditional inner corner pad are cancelled, the sealing structure is directly processed on the valve body and the stuffing box, thereby reducing the purchasing and processing cost.

4. The utility model has good sealing effect and long service life, and the oblique conical surface of the valve body 1 and the spherical sealing surface 14 of the stuffing box 3 have good sealing effect in the aspect of sealing effect, thereby meeting the requirement of long-period use.

Drawings

FIG. 1 is a schematic overall view of a urea high-pressure manual valve according to the present invention;

FIG. 2 is a partial schematic view of a urea high pressure manual valve according to the present invention;

FIG. 3 is an enlarged schematic view of a urea high-pressure manual valve A in the utility model;

FIG. 4 is a schematic view of a conventional concave sealing structure in the background art;

FIG. 5 is a schematic view of a conventional planar gasketed seal structure of the background art;

labeled as: 1-valve body, 2-valve core, 3-stuffing box, 4-sealing structure, 5-stuffing box component, 6-bracket, 7-bolt component, 8-traditional valve body, 9-traditional sealing gasket, 10-traditional stuffing box, 11-traditional sealing structure, 12-traditional outer corner pad, 13-traditional inner corner pad and 14-spherical sealing surface.

Detailed Description

The present invention will be described in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model.

As shown in fig. 1, 2 and 3, a urea high-pressure manual valve comprises a valve body 1, a valve core 2, a stuffing box 3, a sealing structure 4 and a bracket 6, wherein a contact surface between the valve body 1 and the stuffing box 3 forms the sealing structure 4, the contact surface of the valve body 1 is a plane, and the contact surface of the stuffing box 3 is a spherical sealing surface 14; the stuffing box 3 is sleeved on the valve core 2, a stuffing box assembly 5 is arranged between the stuffing box 3 and the valve core 2, a support 6 is clamped on the outer side of the stuffing box 3, and the support 6 is fixed on the valve body 1 through a bolt assembly 7.

Further pointing out the working principle and process of the present invention: the utility model has convenient and accurate disassembly and assembly, and when in disassembly, the bolt assembly 7 between the valve body 1 and the bracket 6 is loosened, and other parts can be quickly disassembled and taken out. During secondary assembly, the groove on the support 6, the bulge matched with the groove on the stuffing box 3, the guide part on the bottom side of the stuffing box 3 and the guide hole matched with the guide part on the valve body 1 can well control the assembling resilience, and the oblique conical surface is tightly contacted with the spherical sealing surface 14 by screwing the bolt assembly 7 between the support 6 and the valve body 1 and enabling the valve core 2 to move up and down, so that the sealing effect is achieved.

During production and processing, the contact surface of the valve body 1 is a plane or the contact surface of the stuffing box 3 is a spherical sealing surface 14, and compared with concave surface processing, the processing difficulty is easier, the size is easier to control, and the control is more accurate.

In the aspect of cost, because the traditional sealing gasket 9, the traditional outer corner pad 12 and the traditional inner corner pad 13 are eliminated, the sealing structure 4 is directly processed on the valve body 1 and the stuffing box 3, and the purchasing and processing cost is reduced.

In the aspect of sealing effect, the sealing effect of the oblique conical surface of the valve body 1 and the spherical sealing surface 14 of the stuffing box 3 is good, and long-period use is met.

As shown in fig. 3, the inclined conical surface of the valve body 1 preferably has an angle of 20 ° with the horizontal plane in the tangential direction along the vertical center line of the valve element 2, and the center point of the spherical sealing surface 14 in the tangential direction along the vertical center line of the valve element 2 coincides with the contact surface of the valve body 1.

As shown in fig. 3, it is more preferable that the spherical sealing surface 14 coincides with the midpoint of the tapered surface in the tangential direction along the vertical center line of the valve body 2 at the midpoint of the tangential direction along the vertical center line of the valve body 2.

As shown in fig. 2, preferably, the lower part of the inner side of the stuffing box 3 is in fit and sleeve connection with the valve core 2, the middle upper part of the inner side of the stuffing box 3 is in a cylindrical ring cavity shape at a position between the middle upper part of the inner side of the stuffing box 3 and the valve core 2, and the stuffing box assembly 5 is in fit and arrangement in the cylindrical ring cavity shape between the middle upper part of the inner side of the stuffing box 3 and the valve core 2 to play a role in sealing.

As shown in fig. 2, preferably, the bottom side of the contact surface of the bracket 6 and the stuffing box 3 is provided with a groove, and the middle lower part of the outer side of the stuffing box 3 is provided with a bulge matched with the groove, so that the bracket 6 is clamped on the outer side of the stuffing box 3, and the assembly resilience is improved.

As shown in fig. 2, preferably, the bottom side of the stuffing box 3 is provided with a guide part, and the valve body 1 is provided with a guide hole matched with the guide part, so that the assembly resilience is improved.

It should be apparent that the above-described embodiments are only some, but not all, of the embodiments of the present invention. All other embodiments and structural changes that can be made by those skilled in the art without inventive effort based on the embodiments described in the present invention or based on the teaching of the present invention, all technical solutions that are the same or similar to the present invention, are within the scope of the present invention.

Claims

1. A urea high-pressure manual valve comprises a valve body (1), a valve core (2), a stuffing box (3), a sealing structure (4) and a support (6), and is characterized in that a contact surface between the valve body (1) and the stuffing box (3) forms the sealing structure (4), the contact surface of the valve body (1) is an oblique conical surface, and the contact surface of the stuffing box (3) is a spherical sealing surface (14); stuffing box (3) cup joints on case (2), is provided with stuffing box subassembly (5) between stuffing box (3) and case (2), and the outside joint of stuffing box (3) has support (6), and support (6) are fixed on valve body (1) through bolt assembly (7).

2. The urea high-pressure manual valve according to claim 1, characterized in that the inclined conical surface of the valve body (1) forms an angle of 20 degrees with the horizontal plane in the tangential direction along the vertical center line of the valve core (2), and the midpoint of the spherical sealing surface (14) in the tangential direction along the vertical center line of the valve core (2) coincides with the contact surface of the valve body (1).

3. The urea high-pressure manual valve according to claim 2, characterized in that the center point of the spherical sealing surface (14) in the tangential direction along the vertical center line of the valve core (2) coincides with the center point of the beveled surface in the tangential direction along the vertical center line of the valve core (2).

4. The urea high-pressure manual valve as claimed in claim 1, wherein the lower part of the inner side of the stuffing box (3) is in fit and sleeve connection with the valve core (2), the middle upper part of the inner side of the stuffing box (3) is in a cylindrical ring cavity shape at a position between the middle upper part of the inner side of the stuffing box (3) and the valve core (2), and the stuffing box assembly (5) is in fit and arrangement in the cylindrical ring cavity shape between the middle upper part of the inner side of the stuffing box (3) and the valve core (2).

5. A urea high-pressure manual valve according to claim 1, characterized in that the bracket (6) is provided with a groove at the bottom side of the contact surface with the stuffing box (3), and the middle lower part of the outer side of the stuffing box (3) is provided with a bulge matched with the groove.

6. A urea high-pressure manual valve according to claim 1, characterized in that the bottom side of the stuffing box (3) is provided with a guide component, and the valve body (1) is provided with a guide hole matched with the guide component.