CN212203130U

CN212203130U - Novel double-seat control valve

Info

Publication number: CN212203130U
Application number: CN202020476040.4U
Authority: CN
Inventors: 黄志彬; 黄志鹏; 黄华龙
Original assignee: Hunan Jiayi Electric Power Technology Development Co ltd
Current assignee: Hunan Jiayi Electric Power Technology Development Co ltd
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2020-12-22
Anticipated expiration: 2030-04-03

Abstract

Novel two seat control valves, including the valve body, the case subassembly, the valve rod, the stopping nut, the upper cover, the lower cover, the valve body both sides are equipped with the medium mouth of crossing, valve body lower extreme fixedly connected with lower cover, be equipped with disk seat and lower disk seat in the valve body, valve body upper end fixedly connected with upper cover, the upper cover upper end is through round nut and mount pad fixed connection, the sliding connection has the valve rod in the upper cover, be equipped with seal assembly between upper cover and the valve rod, the upper cover is worn out to appear in the valve rod upper end and is connected through the connecting rod of mounting and executor, valve rod and case subassembly spiro union are connected, are equipped with flow window on the case subassembly, just the valve rod lower extreme is equipped with the stopping nut, and valve rod, stopping nut and case subassembly structure as an organic whole, case subassembly and last valve seat and lower disk seat difference. The utility model discloses simple structure can 0 ~ 100% full range high accuracy be adjusted, has broken through the bottleneck that the little aperture of internal all single seat governing valves does not have the regulation performance.

Description

Novel double-seat control valve

Technical Field

The utility model relates to a control valve structure especially relates to novel two seat control valves.

Background

The main pipeline of the industry uses imported products, because the imported products have high price and long delivery period, after-sale service is not timely, if a solution is not available under a new working condition negotiated by foreign manufacturers, the industry falls into a quite passive condition, and the industry is gradually localized in the current development trend.

The original selection type on the main pipeline is German acarbo valve, and the domestic replacement technical requirements are as follows: the same reaction speed, flow and adjustment precision are 100 percent; completely meets the inherent characteristics of the original control program, namely the original control.

The existing control valve can be further optimized in the aspects of reaction speed, flow fluctuation and regulation precision.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a novel double-seat control valve, which comprises a valve body, a valve core assembly, a valve rod, a retaining nut, an upper cover, and a lower cover, the two sides of the valve body are provided with medium passing openings, the lower end of the valve body is fixedly connected with a lower cover, an upper valve seat and a lower valve seat are arranged in the valve body, the upper end of the valve body is fixedly connected with an upper cover, the upper end of the upper cover is fixedly connected with the mounting seat through a round nut, a valve rod is connected in the upper cover in a sliding way, a sealing component is arranged between the upper cover and the valve rod, the upper end of the valve rod penetrates through the upper cover and is connected with a connecting rod of an actuator through a fixing piece, the valve rod is connected with a valve core component in a threaded way, a flow window is arranged on the valve core component, and the lower end of the valve rod is provided with a retaining nut, the valve rod, the retaining nut and the valve core assembly are of an integrated structure, and the valve core assembly is respectively matched with the upper valve seat and the lower valve seat.

Preferably, the lower end of the valve body is provided with a step-shaped through hole, the lower cover is matched with the step-shaped through hole, and a winding gasket is arranged between the protrusion of the step-shaped through hole and the lower cover.

Preferably, two ends of the lower cover are fixedly connected with the lower end of the valve body through bolts.

Preferably, the seal assembly includes a valve stem packing and a packing gland that compresses the valve stem packing and sealingly engages the valve stem.

Preferably, the upper end of the valve body is fixedly connected with the upper cover through two bolts.

Preferably, the fixing part comprises a round nut, a connecting block and a baffle, the connecting block is arranged between the upper end of the valve rod and the actuator connecting rod, the baffle and the nut are sequentially arranged at two ends of the connecting block, and the upper end of the valve rod and the actuator connecting rod are respectively fixedly connected with the connecting block through the round nut.

Preferably, the upper valve seat and the lower valve seat are symmetrically arranged.

Compared with the prior art, the utility model discloses following beneficial effect has:

(1) the utility model has simple structure, can be adjusted with high precision in the whole range of 0-100 percent, and breaks through the bottleneck that all single-seat adjusting valves in China have no adjusting performance in small opening degree;

(2) the double-valve-seat design structure is characterized in that the double-valve-seat design structure is used for distributing medium flow up and down, has the functions of balancing component force of a medium acting on a valve core, namely vertically upward component force and vertically downward component force, ensures the stability of the valve core in the operation process, and mainly solves the defect that a single-valve-seat valve has no adjusting performance within 10 percent of opening degree;

(3) the design of case subassembly is two case structures, mainly solves the stability of valve regulation performance, the operating mode condition that can satisfy: at any opening, the pressure difference between the front and the rear of the valve can be changed at will; performing three-dimensional theoretical calculation and performing fluid anti-true verification; the control valve adjusting performance and inherent characteristics are solved.

Drawings

Fig. 1 is an overall structure diagram of the present invention.

Fig. 2 is a schematic view of the valve rod and the valve core assembly of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1-2, the novel double-seat control valve includes a valve body 1, an upper valve seat 2, a lower valve seat 3, a valve core assembly 4, a valve rod 5, a retaining nut 6, an upper cover 7, a lower cover 8, a wound gasket 9, a bolt 10, a valve rod packing 11, a packing gland 12, a round nut 13, a connecting rod 14, a connecting block 15, a baffle 16, and an actuator 17.

The two sides of the valve body 1 are provided with medium through openings, the lower end of the valve body 1 is fixedly connected with a lower cover 8, the lower end of the valve body 1 is provided with a stepped through hole, the lower cover 8 is matched with the stepped through hole, a winding gasket 9 is arranged between the protrusion of the stepped through hole and the lower cover 8, and the two ends of the lower cover 8 are fixedly connected with the lower end of the valve body 1 through bolts 10.

An upper valve seat 2 and a lower valve seat 3 are arranged in a valve body 1, the upper valve seat 2 and the lower valve seat 3 are symmetrically arranged to realize the flow of an upper shunting medium and a lower shunting medium, the functions of the upper shunting medium are to balance component forces of the medium acting on a valve core, one component force is vertically upward component force, and the other component force is vertically downward component force, through theoretical calculation, three-dimensional design is carried out on the basis for ensuring the technical index Cv value of the flow force of the valve, meanwhile, fluid anti-true verification is carried out, the stability of the operation process of the valve core is ensured, and the defect that a single-seat valve has no adjusting performance within 10% of the.

1 upper end of valve body is through two bolt 10 fixedly connected with upper cover 7, and 7 upper ends of upper cover are through round nut 13 and mount pad fixed connection, and the sliding connection has the valve rod in the upper cover 7, is equipped with seal assembly between upper cover 7 and the valve rod, and seal assembly includes valve rod packing 11 and gland 12, and gland 12 compresses tightly valve rod packing 11 and with valve rod sealing connection, and the leakproofness between packing and the valve rod can be guaranteed to this structure.

The upper cover 7 is worn to establish in the 5 upper end of valve rod and is connected through the connecting rod 14 of mounting and executor 17, and the mounting includes round nut 13, connecting block 15 and baffle 16, is equipped with connecting block 15 between 5 upper ends of valve rod and the 17 connecting rod 14 of executor, and connecting block 15 both ends are equipped with baffle 16 and nut in proper order, and 5 upper ends of valve rod and connecting rod 14 are respectively through round nut 13 and connecting block 15 fixed connection.

Valve

rod

5 and 4 spiro union of case subassembly are equipped with the flow window on the case subassembly 4, the velocity of flow of control valve, and the 5 lower extremes of valve rod are equipped with stopping nut 6, and valve rod 5, stopping nut 6 and case subassembly 4 structure as an organic whole, and case subassembly 4 designs to be the double-valve-core structure, and last disk seat 2 and disk seat 3 difference adaptation down mainly solve the stability of valve regulation performance, the operating mode condition that can satisfy: at any opening, the pressure difference between the front and the rear of the valve can be changed at will; performing three-dimensional theoretical calculation and performing fluid anti-true verification; the scheme mainly solves the problems of the adjusting performance and the inherent characteristic of the control valve.

The working principle is as follows: the connecting rod 14 of the actuator 17 is fixedly connected with the upper end of the valve rod through the connecting block 15 and the nut, the lower end of the valve rod 5 and the valve core are fixedly connected through the internal thread retaining nut 6 to form an integrated structure, the actuator 17 transmits power to enable the connecting rod 14 of the actuator 17 to move upwards to drive the valve rod 5 and the valve core assembly 4 to move upwards, the relative flow area between the valve core assembly 4 and the valve seat is increased along with the upward movement of the valve core assembly 4, the corresponding medium flow is increased, and otherwise, the actuator 17 reduces the force to enable the valve core assembly 4 and the valve rod to reset.

The utility model discloses a product has good market perspective, has used: (1) 1780 Hot-Tie Cooling System, Liuzhou Steel works, Inc.; (2) lake south china water chestnut ripple iron and steel limited 2250 hot-rolling cooling system.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the right of the present invention should not be limited thereby, and therefore, modifications, equivalent changes, improvements, etc. made in the claims of the present invention are still included in the scope of the present invention.

Claims

1. Novel two seat control valves, its characterized in that: the valve comprises a valve body, a valve core assembly, a valve rod, a retaining nut, an upper cover and a lower cover, wherein medium through holes are formed in two sides of the valve body, the lower end of the valve body is fixedly connected with the lower cover, an upper valve seat and a lower valve seat are arranged in the valve body, the upper end of the valve body is fixedly connected with the upper cover, the upper end of the upper cover is fixedly connected with an installation seat through a round nut, the valve rod is connected in the upper cover in a sliding mode, a sealing assembly is arranged between the upper cover and the valve rod, the upper end of the valve rod penetrates through the upper cover to be connected with a connecting rod of an actuator through a fixing piece, the valve rod is in threaded connection with the valve core assembly, a flow window is formed in the valve core assembly, the lower end of the valve rod is provided with the retaining.

2. The new double seat control valve according to claim 1, characterized in that: the lower end of the valve body is provided with a stepped through hole, the lower cover is matched with the stepped through hole, and a winding gasket is arranged between the protrusion of the stepped through hole and the lower cover.

3. The new double seat control valve according to claim 1 or 2, characterized in that: and two ends of the lower cover are fixedly connected with the lower end of the valve body through bolts.

4. The new double seat control valve according to claim 1, characterized in that: the sealing assembly comprises a valve rod packing and a packing gland, and the packing gland compresses the valve rod packing and is connected with the valve rod in a sealing mode.

5. The new double seat control valve according to claim 1, characterized in that: the upper end of the valve body is fixedly connected with the upper cover through two bolts.

6. The new double seat control valve according to claim 1, characterized in that: the fixing part comprises a round nut, a connecting block and a baffle, the connecting block is arranged between the upper end of the valve rod and the actuator connecting rod, the baffle and the nut are sequentially arranged at two ends of the connecting block, and the upper end of the valve rod and the actuator connecting rod are respectively fixedly connected with the connecting block through the round nut.

7. The new double seat control valve according to claim 1, characterized in that: the upper valve seat and the lower valve seat are symmetrically arranged.