CN208252810U - A kind of cam flexure regulating valve suitable for High Pressure Difference operating condition containing solid particle - Google Patents

Abstract

The utility model belongs to the technical field of valves, and in particular relates to a cam deflection regulating valve suitable for working conditions of high pressure difference containing solid particles. The cam deflection regulating valve provided by the utility model, which is suitable for the working condition of high pressure difference containing solid particles, includes: a valve body, a valve core assembly, a valve seat, a valve stem, a guide column, an upper guide sleeve, a lower guide sleeve and a pressure ring Nut; it can run stably for a long period of time under the condition of high pressure difference, especially when the medium contains a large amount of solid particles.

Description

A cam deflection regulating valve suitable for high pressure difference containing solid particles

technical field

The utility model belongs to the technical field of valves, and in particular relates to a cam deflection regulating valve suitable for working conditions of high pressure difference containing solid particles.

Background technique

The cam deflection regulating valve mainly includes a valve body, a valve core, a valve seat, a valve stem, etc. The valve core is connected to the valve stem, and the valve core is driven to rotate through the torque transmitted by the valve stem to complete the closing and opening of the valve core to the valve seat. Cam deflection regulating valve absorbs some advantages of ball valve and butterfly valve, and has a series of advantages such as simple structure, reliable sealing, stable operation under small opening, wide operating temperature range, etc., especially suitable for high viscosity, slurry and granular media It is widely used in petroleum, chemical industry, metallurgy, coal chemical industry and other industrial production.

The existing cam deflection regulating valve has a good performance under the condition of low pressure difference, but there are a series of problems under the condition of high pressure difference and containing solid particles, as follows:

1) The valve core is limited by the choice of material. Under the condition of high pressure difference and solid particles, the valve core spherical crown is severely eroded.

2) The one-piece valve stem occupies the space of the flow channel, resulting in large flow resistance and serious erosion of the valve core.

3) Under the condition of high pressure difference and solid particles, the surface of the valve seat flow channel is severely eroded. Long-term scouring will cause the throat diameter of the valve seat to increase, the adjustment accuracy to decrease, the seat wall to become thinner, and the strength to decrease.

4) The setting of the guide counterbore at the bottom of the valve body increases the difficulty of casting and processing, and it is difficult to guarantee the processing quality, which is not conducive to installation and maintenance.

5) The rotation of the spool will cause friction with the valve body, which will cause wear to the valve body and affect the life of the valve if it continues for a long time.

6) If the valve stem is not connected to the actuator, under high-pressure conditions, the valve stem may even fly out of the guide sleeve, causing medium leakage and potential safety hazards.

Therefore, there is an urgent need to develop a cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, so as to solve the above technical problems.

Contents of the invention

The technical problem to be solved by the utility model is to provide a cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, so as to solve the problem that the cam deflection regulating valve of the prior art scheme cannot operate stably for a long time.

In order to realize this purpose, the technical scheme that the utility model takes is:

A cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, the regulating valve includes: a valve body, a valve core assembly, a valve seat, a valve stem, a guide post, an upper guide sleeve, a lower guide sleeve and a pressure ring nut;

The part of the valve body where the guide counterbore is installed is provided with a guide column. The guide column is specifically a column whose lower end cross-section is larger than the upper end cross-section. The guide column is compatible with the through hole opened under the valve body;

A number of threaded countersunk holes are set beside the through holes opened in the valve body, and the lower end of the guide post has the same number of through holes. seal;

The valve core assembly is a split structure, with a valve core bracket and a valve core alloy. The valve core bracket is a C-shaped curved arm structure, which is fixed with the valve core alloy by bolts;

The lower end of the curved arm of the spool support is adapted to the guide column, and the lower guide sleeve is installed in the annular gap between the guide post and the valve core support. The spool support and the lower guide sleeve are interference fit, and the lower guide sleeve and the guide column Clearance fit, the lower end of the curved arm of the spool assembly is in direct contact with the lower guide sleeve;

The upper end of the curved arm of the spool support is connected to the valve stem. When the valve stem rotates, the connecting structure transmits torque, and the upper curved arm of the spool support drives the spool assembly to rotate to complete the opening and closing of the spool assembly to the valve seat;

The valve seat is pressed by the pressure ring nut, which is tightly combined with the spherical surface of the valve core alloy to achieve sealing;

The upper guide sleeve is a T-shaped rotating body with a through hole, which is set on the annular step of the valve body. The lower end of the upper guide sleeve is in direct contact with the upper end of the curved arm of the valve core support; the upper guide sleeve is installed in sequence from bottom to top. The packing assembly, packing pressure pipe, and packing pressure plate are connected to the valve body through the packing pressure plate bolts and nuts on the packing pressure plate, so as to compress the valve trim;

The lower guide sleeve is embedded in the annular gap between the guide column and the valve core support;

The isolation tube has a T-shaped through hole;

The valve stem is provided with a shoulder, the diameter of the shoulder is larger than the diameter of the small end of the T-shaped through hole in the isolation tube, the diameter of the shoulder is larger than the inner diameter of the packing pad, the diameter of the shaft shoulder is larger than the diameter of the large end of the T-shaped through hole in the isolation tube, and the direction of the valve stem is limited by the shoulder of the valve stem. Axial displacement.

Further, in the above cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, the alloy material of the valve core in the valve core assembly is hard alloy.

Further, in the above cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, the span of the valve core support is larger than the valve inlet diameter and the valve outlet diameter.

Further, in the above cam deflection regulating valve suitable for high pressure difference containing solid particles, the bonding surface between the spool support and the spool alloy is a stepped surface; the platform of the spool support is set as a stepped surface, and The spool carrier platform fits the spool alloy set to match the stepped surface.

Furthermore, in the above cam deflection regulating valve suitable for high pressure difference containing solid particles, the connection mode between the valve core support and the valve core alloy is one of the following methods:

① Set a through hole perpendicular to the stepped surface of the valve core alloy, and set the same number of threaded holes perpendicular to the stepped surface of the valve core support. The bolts pass through the through holes and threaded holes in turn and are welded to the bottom of the valve core support;

② The valve core alloy is welded on the valve core bracket;

③ The stepped surface of the spool alloy and the spool support are connected by being provided with external threads and internal threads.

Further, in the above cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, the connection form of the valve stem and the valve core assembly is one of the following forms: spline and welding.

Further, in the above cam deflection regulating valve suitable for high pressure difference and containing solid particles, the valve seat flow path of the valve seat is surface hardened by one of the following methods: spraying, spray welding, and surfacing hard alloy.

Further, in the above cam deflection regulating valve suitable for high pressure difference containing solid particles, the valve seat is hardened in one of the following two ways:

①The valve seat is a compound seat assembly structure, including a seat alloy and a seat sleeve. The seat alloy is made of hard alloy. It is compatible with the T-shaped through hole in the valve seat sleeve;

②The valve seat is hardened in the form of solid carbide.

Further, in the above cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles, the valve stem is provided with a shaft shoulder anti-blowout structure.

The beneficial effect of the utility model is that: the cam deflection regulating valve suitable for the working condition of high pressure difference containing solid particles provided by the utility model can run stably for a long period under the working condition of high pressure difference, especially the working condition of a large amount of solid particles in the medium , the specific effect is as follows:

1. In the utility model, the spool assembly adopts a split design, and the spool alloy can be hard alloy, which can effectively overcome the erosion of the spool ball crown by high pressure difference and solid particle-containing working conditions.

2. In the utility model, the valve core support is changed from a D-type structure to a C-type structure. The C-type span of the valve core support is larger than the diameter of the valve inlet and outlet, which ensures smooth flow passages, reduces flow resistance, and reduces the impact on the valve core support. scour.

3. In the utility model, the bonding surface of the spool support and the spool alloy is a stepped surface, which effectively prevents the connecting bolts of the spool assembly from bearing transverse shearing force.

4. In the utility model, the lower end of the curved arm of the valve core support is adapted to the guide column, and the upper end of the curved arm is connected with the valve stem through splines or keys, which can be selected according to the requirements of the working conditions.

5. The valve seat in this utility model can adopt various hardening forms, including the surface hardening of the valve seat flow channel, valve seat assembly, solid carbide and other forms, which can be selected according to the requirements of the working conditions.

6. The utility model cancels the guide counterbore at the bottom of the valve body, reduces the casting and processing difficulty of the valve body, ensures the processing quality, and facilitates installation and maintenance.

7. The setting of the upper guide sleeve and the lower guide sleeve in the utility model avoids direct contact between the valve core assembly and the valve body, reduces wear on the valve body, and prolongs the service life of the valve.

8. In the utility model, the valve stem is equipped with a shaft shoulder anti-blowout structure to prevent the valve stem from flying out of the sleeve when the valve stem is not connected to the actuator and the valve inner cavity is a high-pressure medium.

Description of drawings

Fig. 1 is the structure schematic diagram of the utility model regulating valve;

Fig. 2 is a schematic structural view of the valve core assembly;

Fig. 3 is a structural schematic diagram of a valve seat assembly;

Fig. 4 is a schematic diagram of the solid carbide of the valve seat;

Fig. 5 is a schematic diagram of preventing blow-out of the valve stem.

In the figure: 1 valve body, 2 valve core assembly, 3 valve seat, 4 valve stem, 5 guide column, 6 upper guide sleeve, 7 lower guide sleeve, 8 pressure ring nut, 9 isolation tube, 10 packing pad, 11 packing assembly , 12 packing pressure tube, 13 packing pressure plate, 14 packing pressure plate bolt nut, 15 gasket, 16 set screw, 17 valve core support, 18 valve core alloy, 19 valve core assembly bolt, 20 valve seat sleeve, 21 valve seat alloy .

Detailed ways

The technical scheme of the utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

As shown in Figure 1, the utility model is a cam deflection regulating valve suitable for high pressure difference containing solid particles. The regulating valve includes: valve body 1, valve core assembly 2, valve seat 3, valve stem 4, and guide column 5. Upper guide sleeve 6, lower guide sleeve 7 and pressure ring nut 8;

The part of the valve body 1 where the guide counterbore is installed is provided with a guide column 5, the guide column 5 is specifically a cylinder with a lower end cross-section larger than the upper end cross-section, and the guide column 5 is adapted to the through hole opened under the valve body 1;

A number of threaded counterbores are set beside the through hole provided in the valve body 1, and the lower end of the guide column 5 has the same number of through holes, and the guide column 5 is fixed below the valve body 1 by a set screw 16. Gasket 15 is also arranged between to seal;

The spool assembly 2 is a split structure, and is provided with a spool support 17 and a spool alloy 18. The spool support 17 is a C-shaped curved arm structure, and is fixed with the spool alloy 18 by bolts 19;

The valve core alloy 18 material in the valve core assembly 2 is hard alloy;

As shown in Figure 2, the lower end of the curved arm of the spool support 17 is adapted to the guide column 5, and the lower guide sleeve 7 is installed in the annular gap between the guide column 5 and the connection part of the spool support 17, and the spool support 17 and the lower guide sleeve 7 is an interference fit, the lower guide sleeve 7 and the guide column 5 are clearance fit, and the lower end of the curved arm of the spool assembly 2 is in direct contact with the lower guide sleeve 7;

The upper end of the curved arm of the spool support 17 is connected to the valve stem 4. When the valve stem 4 rotates, the connecting structure transmits torque, and the upper curved arm of the spool support 17 drives the spool assembly 2 to rotate, and the opening of the valve core assembly 2 to the valve seat 3 is completed. close;

The span of the spool support 17 is larger than the valve inlet diameter and the valve outlet diameter; the bonding surface between the spool support 17 and the spool alloy 18 is a stepped surface; The matching spool alloy 18 sets the matching step surface;

The connection mode between the spool support 17 and the spool alloy 18 is one of the following ways:

① Set a through hole perpendicular to the stepped surface of the spool alloy 18, and set the same number of threaded holes perpendicular to the stepped surface of the spool support 17. The bolt 19 passes through the through hole and the threaded hole in turn and is welded to the bottom of the spool support 17;

② The spool alloy 18 is welded on the spool bracket 17;

③ The stepped surface of the spool alloy 18 and the spool support 17 are connected by being provided with external threads and internal threads;

The valve seat 3 is pressed tightly by the pressure ring nut 8, and is tightly combined with the spherical surface of the valve core alloy 18 to achieve sealing;

The seat flow channel of valve seat 3 is surface hardened by one of the following methods: spraying, spray welding, surfacing hard alloy;

Seat 3 is hardened in one of two ways:

①As shown in Figure 3, the valve seat 3 is a composite seat assembly structure, including a seat alloy 21 and a seat sleeve 20, the seat alloy 21 is made of hard alloy, and the valve seat sleeve 20 is provided with a T-shaped through hole. The seat alloy 21 is a T-shaped rotating body, and the valve seat alloy 21 is compatible with the T-shaped through hole in the valve seat sleeve 20;

② As shown in Figure 4, the valve seat is hardened in the form of solid carbide;

The upper guide sleeve 6 is a T-shaped rotating body with a through hole, which is arranged on the annular step of the valve body 1. The lower end of the upper guide sleeve 6 is in direct contact with the upper end of the curved arm of the valve core support 17; the upper guide sleeve 6 is installed and isolated from bottom to top. Pipe 9, packing pad 10, packing assembly 11, packing pressure pipe 12, packing pressure plate 13 are connected to valve body 1 through the packing pressure plate bolts and nuts 14 on the packing pressure plate 13, so as to compress the internal parts of the valve;

The lower guide sleeve 7 is embedded in the annular gap between the guide column 5 and the valve core support 17;

As shown in Figure 5, the isolation tube 9 has a T-shaped through hole;

The valve stem 4 is provided with a shaft shoulder, the diameter of which is greater than the diameter of the small end of the T-shaped through hole in the isolation tube 9, the diameter of the shaft shoulder is greater than the inner diameter of the packing pad 10, and the diameter of the shaft shoulder is greater than or smaller than the diameter of the large end of the T-shaped through hole in the isolation tube 9, through the valve stem 4 The shaft shoulder limits the axial displacement of the valve stem in the 4 direction.

The connection form of the valve stem 4 and the valve core assembly 2 is one of the following forms: splines and welding.

The valve stem 4 is provided with a shaft shoulder anti-blowout structure.

The basic principles, main features and advantages of the present invention have been shown and described above. The present invention is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention also has various changes and improvements. These changes and Modifications are within the scope of the claimed invention. The claimed scope of the invention is defined by the appended claims and their equivalents.

Claims (10)

1. A cam deflection control valve suitable for high pressure differential containing solid particles, characterized in that: The regulating valve includes: valve body (1), valve core assembly (2), valve seat (3), valve stem (4), guide column (5), upper guide sleeve (6), lower guide sleeve (7) and pressure ring nut (8); The part of the valve body (1) where the guide counterbore is installed is provided with a guide post (5). The guide post (5) is specifically a cylinder whose lower end cross-section is larger than the upper end cross-section. The opened through hole is compatible; A number of threaded countersunk holes are set beside the through hole provided in the valve body (1), and the lower end of the guide column (5) has the same number of through holes, and the guide column (5) is fixed on the valve body (1) by a set screw (16). ) below, a gasket (15) is also provided between the guide column (5) and the valve body (1) for sealing; Spool assembly (2) is split structure, is provided with spool support (17), spool alloy (18), and spool support (17) is C-shaped curved arm structure, and spool alloy (18) passes bolt ( 19) Fixed; The lower end of the curved arm of the spool support (17) is adapted to the guide column (5), and the lower guide sleeve (7) is installed in the annular gap between the guide column (5) and the connecting part of the spool support (17), and the spool support ( 17) It is an interference fit with the lower guide sleeve (7), and the lower guide sleeve (7) is a clearance fit with the guide column (5), and the lower end of the curved arm of the valve core assembly (2) is in direct contact with the lower guide sleeve (7); The upper end of the curved arm of the spool support (17) is connected to the valve stem (4). When the valve stem (4) rotates, the connecting structure transmits torque, and the upper curved arm of the spool support (17) drives the spool assembly (2) to rotate, completing The opening and closing of the valve core assembly (2) to the valve seat (3); The valve seat (3) is pressed tightly by the pressure ring nut (8) and tightly combined with the spherical surface of the valve core alloy (18) to achieve sealing; The upper guide sleeve (6) is a T-shaped rotating body with a through hole, which is arranged on the annular step of the valve body (1). The lower end of the upper guide sleeve (6) is in direct contact with the upper end of the curved arm of the valve core support (17); Install the isolation tube (9), packing pad (10), packing assembly (11), packing pressure tube (12), packing pressure plate (13) from bottom to top in the sleeve (6), through the packing pressure plate on the packing pressure plate (13) Bolts and nuts (14) are connected to the valve body (1), thereby compressing the valve trim; The lower guide sleeve (7) is embedded in the annular gap between the guide column (5) and the valve core support (17); The isolation tube (9) has a T-shaped through hole; The valve stem (4) is provided with a shoulder, and the diameter of the shoulder is larger than the diameter of the small end of the T-shaped through hole in the isolation tube (9), the diameter of the shaft shoulder is larger than the inner diameter of the packing pad (10), and the diameter of the shoulder is larger than that of the T-shaped hole in the isolation tube (9). The diameter of the large end of the through hole limits the axial displacement in the direction of the valve rod (4) through the shaft shoulder of the valve rod (4). 2. A cam deflection regulating valve suitable for working conditions of high pressure difference containing solid particles as claimed in claim 1, characterized in that: the material of the valve core alloy (18) in the valve core assembly (2) is hard alloy . 3. A cam deflection regulating valve suitable for working conditions of high pressure difference containing solid particles according to claim 1, characterized in that the span of the valve core support (17) is larger than the valve inlet diameter and the valve outlet diameter. 4. A cam deflection regulating valve suitable for working conditions of high pressure difference containing solid particles according to claim 1, characterized in that: the bonding surface between the spool support (17) and the spool alloy (18) It is a step surface; the platform of the spool support (17) is set as a step surface, and the spool alloy (18) that fits with the platform of the spool support (17) is provided with a matching step surface. 5. A cam deflection control valve suitable for high pressure difference containing solid particles as claimed in claim 4, characterized in that: the valve core support (17) and the valve core alloy (18) are connected in the following manner one: ① Set a through hole perpendicular to the stepped surface of the valve core alloy (18), and set the same number of threaded holes perpendicular to the stepped surface of the valve core support (17). Support (17) bottom; ②The spool alloy (18) is welded on the spool support (17); 3. the step surface that the spool alloy (18) matches with the spool support (17) is connected by being provided with an external thread and an internal thread. 6. A cam deflection regulating valve suitable for high pressure difference containing solid particles according to claim 1, characterized in that: the connection form of the valve stem (4) and the valve core assembly (2) is one of the following forms One: spline, welding. 7. A cam deflection control valve suitable for high pressure difference containing solid particles as claimed in claim 1, characterized in that: the valve seat flow channel of the valve seat (3) is surface hardened by one of the following forms: Spraying, spray welding, surfacing hard alloy. 8. A cam deflection regulating valve suitable for high pressure difference containing solid particles as claimed in claim 1, characterized in that: the valve seat (3) is hardened by one of the following two forms: ①The valve seat (3) is a compound seat assembly structure, including the valve seat alloy (21) and the valve seat sleeve (20), the valve seat alloy (21) is made of hard alloy, and the valve seat sleeve (20) is provided with a T Through hole, the valve seat alloy (21) is a T-shaped rotating body, and the valve seat alloy (21) is compatible with the T-shaped through hole in the valve seat sleeve (20); ②The valve seat is hardened in the form of solid carbide. 9. A cam deflection control valve suitable for working conditions with high pressure difference and solid particles as claimed in claim 1, characterized in that: the valve stem (4) is provided with a shaft shoulder anti-blowing structure. 10. A cam deflection regulating valve suitable for high pressure difference containing solid particles according to claim 1, characterized in that: the material of the valve core alloy (18) in the valve core assembly (2) is hard alloy ; The span of the spool support (17) is greater than the valve inlet diameter and the valve outlet diameter; The bonding surface between the spool support (17) and the spool alloy (18) is a step surface; the platform of the spool support (17) is set as a step surface, and the spool alloy ( 18) Set the matching step surface; The connecting mode of spool support (17) and spool alloy (18) is one of the following ways: ① Set a through hole perpendicular to the stepped surface of the valve core alloy (18), and set the same number of threaded holes perpendicular to the stepped surface of the valve core support (17). the bottom of the bracket (17); ②The spool alloy (18) is welded on the spool support (17); ③The stepped surface of the spool alloy (18) and the spool support (17) are connected by being provided with external threads and internal threads; The connection form of the valve stem (4) and the valve core assembly (2) is one of the following forms: spline, welding; The valve seat flow channel of the valve seat (3) is surface hardened by one of the following methods: spraying, spray welding, hard alloy surfacing; The seat (3) is hardened in one of two ways: ①The valve seat (3) is a compound seat assembly structure, including the valve seat alloy (21) and the valve seat sleeve (20), the valve seat alloy (21) is made of hard alloy, and the valve seat sleeve (20) is provided with a T Through hole, the valve seat alloy (21) is a T-shaped rotating body, and the valve seat alloy (21) is compatible with the T-shaped through hole in the valve seat sleeve (20); ②The valve seat is hardened in the form of solid carbide; The valve stem (4) is provided with a shaft shoulder anti-blowout structure.