A sleeve type control valve

Abstract

The present invention relates to a sleeve type control valve, comprising: a main valve body: a two-stage embedded cylindrical structure with different diameters, comprising an integrally formed small diameter inner cylinder and a large diameter outer cylinder; a fixed cone: fixedly installed at the axis inside the main valve body; a side valve body: comprising an integrally formed front opening and a rear straight cylinder, the front opening is fixedly connected to the rear end of the outer cylinder through a flange, and the straight flow channel of the rear straight cylinder is connected to the annular flow channel of the main valve body; an outer sleeve: comprising a front flow channel portion and a rear end closing portion, a plurality of flow channel holes are provided on the surface of the front flow channel portion, the front flow channel portion is covered with the rear part of the fixed cone, the rear end closing portion is covered with the rear straight cylinder portion, and moves back and forth along the axis to realize the opening and closing of the flow channel; a driving device: installed above the side valve body, used to drive the outer sleeve to move back and forth. Compared with the prior art, the present invention has the advantages of light transmission torque, small flow resistance loss, prevention of cavitation, and online efficient backwashing.

Description

Technical Field

[0001] The invention relates to the field of flow and pressure regulating control valves, and in particular to a sleeve type control valve. Background Art

[0002] The flow and pressure regulating control valve is the first choice for flow and pressure control. It is now widely used in large and medium-sized cities across the country as a mature product. The spray hole sleeve valve uses the collision of multiple water flow centers to reduce pressure and dissipate energy, so that the water flow in the downstream pipeline is more stable and the operation is safer. At present, the multi-spray hole control valves on the market generally have the following problems:

[0003] 1. The raw water is easily blocked when running at a small opening;

[0004] 2. The moving parts are inside the valve body, which makes the structure complex and difficult to operate and maintain;

[0005] 3. Poor stability and easy to get stuck.

[0006] Chinese patent CN 1405473A discloses a multi-spray hole sleeve axial flow control valve, in which the inner cavity of the outer valve body is provided with a circular sleeve with multiple spray holes, one end of the circular sleeve is fixedly arranged between one end face of the outer valve body and the flange, and an end cover is fixedly arranged at the other end of the circular sleeve. The outer surface of the circular sleeve is covered with a circular sleeve, and a driving arm is provided on the circular sleeve. The driving arm is connected to the driving mechanism, and the driving arm is controlled to move forward and backward by an adjusting device to drive the circular sleeve to move on the circular sleeve. The defect of this structure is that the circular sleeve with the spray hole is a fixed part. Once the spray hole is blocked, it is very easy to cause the circular sleeve of the moving part to be blocked. In addition, the saddle-shaped driving arm drives the circular sleeve to move forward and backward by swinging, which requires very high processing accuracy of the driving arm and the adjusting device. Large errors can easily cause the circular sleeve to rotate and get stuck during movement. Summary of the invention

[0007] The purpose of the present invention is to provide a sleeve type control valve in order to overcome the defects of the prior art.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A sleeve type control valve, comprising:

[0010] Main valve body: a two-stage embedded cylindrical structure with different diameters, including an integrally formed small-diameter inner cylinder and a large-diameter outer cylinder;

[0011] Fixed cone: fixedly installed on the axis inside the main valve body to form an annular flow channel of the main valve body;

[0012] Side valve body: It is a stepped structure with a larger front and a smaller rear, including an integrally formed front opening and a rear straight tube. The front opening is fixedly connected to the rear end of the outer tube through a flange, and the straight flow channel of the rear straight tube is connected to the annular flow channel of the main valve body;

[0013] Outer sleeve: including a front end flow channel part and a rear end closing part, with multiple circles of flow channel holes opened on the surface of the front end flow channel part, the front end flow channel part is covered with the rear part of the fixed cone, and the rear end closing part is covered with the rear straight tube part, and moves back and forth along the axis to realize the opening and closing of the flow channel;

[0014] Driving device: installed above the side valve body, used to drive the outer sleeve to move back and forth.

[0015] The flow channel hole is a tapered hole, and the outer diameter of the tapered hole is larger than the inner diameter.

[0016] The fixed cone is composed of a cross guide rib plate and a cone with straight cylindrical edges connected to each other. The cross guide rib plate is installed inside the small diameter inner cylinder, and the front end of the outer sleeve is sleeved on the rear of the cone with straight cylindrical edges.

[0017] The driving device comprises an electric actuator, a Y-shaped double-bevel gearbox, and two sets of driving mechanisms which are respectively connected to the Y-shaped double-bevel gearbox and are symmetrically arranged on the left and right. Each set of driving mechanisms is connected to the outer sleeve through a thrust ear.

[0018] Each set of driving mechanism is composed of a universal coupling, a transmission rod, a bevel gear box and a screw assembly which are driven in sequence. The front end of the screw assembly is connected to a thrust ear and is locked by a nut.

[0019] The outer side of the side valve body is symmetrically provided with a rib frame, and a removable limit pin is provided on the rib frame to limit the stroke of the screw assembly.

[0020] A plurality of inspection ports are provided on the outer circumference of the large-diameter outer cylinder of the main valve body.

[0021] When the valve is in an open state, the outer sleeve is located in an open position, and the front end flow channel portion of the outer sleeve is located at an annular flow position formed by the front opening of the side valve body and the rear portion of the fixed cone. After the water flows along the annular opening formed between the fixed cone and the inner wall of the main valve body into the front opening of the side valve body, it enters the outer sleeve and the rear straight cylinder portion through the flow channel hole on the outer sleeve.

[0022] When the valve is in a closed state, the outer sleeve is located in a closed position, and the rear end sealing portion of the outer sleeve is located at an annular flow position formed by the front opening of the side valve body and the rear portion of the fixed cone, blocking the flow channel.

[0023] When the valve is in the backwash state, the outer sleeve is located at the backwash position, the front end flow channel portion of the outer sleeve is located at the annular opening formed between the fixed cone and the inner wall of the main valve body, and the rear end sealing portion is fitted and sealed with the rear part of the fixed cone.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1. Light transmission torque: The present invention uses a Y-type double-umbrella gear box to drive the screw assemblies located on both sides of the side valve body to directly drive the axial movement of the outer sleeve to control the flow of the spray hole body. The screw assembly is only affected by the very light gravity of the outer sleeve and is not affected by the water flow pressure. Therefore, the transmission torque is extremely light. In addition, the driving components are located outside the side valve body, and maintenance is very simple.

[0026] 2. Small flow resistance loss and prevention of cavitation: The outer sleeve of the present invention adopts a tapered hole design, which has small flow resistance loss compared with straight hole injection and can increase the flow capacity by 30%. In addition, the orifice of the tapered hole is similar to a venturi tube, and the water flow is continuously accelerated until it is ejected from the nozzle. Pressure recovery occurs outside the nozzle, and bubble bursting occurs in the water, completely avoiding the occurrence of cavitation at the nozzle.

[0027] 3. Easy cleaning and high efficiency: When it is necessary to clean the spray hole, remove the limit pins on the left and right sides of the side valve body, reverse the motor, and push the outer sleeve backward with the screw. When the spray hole covers the inlet annular area of ​​the water flow, backwashing can be achieved under the action of high-pressure water flow. In addition, due to the tapered hole design, during backwashing, the water flows in from a small mouth and out from a large mouth, so it is easy to clean. The backwashing consumes less water and is more efficient. In addition, an inspection port is set on the main valve body to clean the garbage on the outer sleeve that is not easy to wash away without disassembling the valve during overhaul. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a half-section top view of the present invention when it is working normally.

[0029] Figure 2 It is a right side view of the present invention.

[0030] Figure 3 It is a half-section top view of the present invention during backwashing.

[0031] Description of the markings in the figure:

[0032] 1. Main valve body, 2. Side valve body, 3. Outer sleeve, 4. Fixed cone, 5. Conical hole, 6. Thrust ear, 7. Bolt, 8. Ring mouth, 9. Screw assembly, 10. Bevel gearbox, 11. Y-type double bevel gearbox, 12. Electric actuator, 13. Nut, 14. Transmission rod, 15. Universal coupling, 16. Bracket, 17. Limit pin, 18. Inspection port. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Example

[0035] like Figure 1 and 2 As shown, a new type of sleeve type control valve provided by the present invention comprises a main valve body 1, a side valve body 2, an outer sleeve 3 and a driving device, specifically:

[0036] The main valve body 1 is a two-stage embedded cylindrical structure with large and small diameters and a flange. The small diameter cylinder of the main valve body 1 is inserted into the large diameter cylinder, and a fixed cone 4 is provided in the inner cavity thereof; a plurality of conical holes 5 are provided on the front surface of the outer sleeve 3, and are sleeved on the rear of the fixed cone 4;

[0037] The side valve body 2 is a stepped cylinder with flanges on both sides. The minimum inner diameter of the cylinder matches the outer diameter of the outer sleeve 3. The side valve body 2 is sleeved on the outside of the outer sleeve 3, and the side valve body 2 is fixedly connected to the main valve body 1 with bolts 7. Rib frames are symmetrically arranged on the outside of the side valve body 3. Removable limit pins are provided on the rib frames to limit the stroke of the screw assembly. The thrust ears 6 on the left and right sides of the outer sleeve 3 are connected to the driving device and driven by the driving device to reciprocate along the axial direction.

[0038] The fixed cone 4 is composed of a cross guide rib plate arranged inside the small diameter cylinder of the main valve body and a cone with a straight cylindrical edge. The flow area of ​​the annular opening opened between the small diameter cylinder and the cone is 100% equivalent to the valve diameter.

[0039] When the valve is in the open state, water flows in from the annular opening 8 at the front end of the fixed cone 4, and the flow rate or pressure is adjusted by blocking or opening the conical hole 5 on the outer sleeve;

[0040] like Figure 2 As shown, the driving device includes a screw assembly 9, an umbrella gear box 10, a transmission rod assembly, a Y-type double umbrella gear box 11, and an electric actuator 12. The screw assembly 9 is symmetrically distributed on both sides of the side valve body 2, and one end is fixedly connected to the outer sleeve 3 by a nut 13, and the other end is connected to the umbrella gear box 10; the umbrella gear box 10 is symmetrically distributed on both sides of the side valve body 2 and connected to one end of the transmission rod assembly; the transmission rod assembly is composed of a transmission rod 14 and a universal coupling 15, and the other end is connected to the Y-type double umbrella gear box 11; the Y-type double umbrella gear box 11 is connected to the electric actuator 12 through a bracket 16, and the stroke of the outer sleeve 3 is limited by the external limit pin 17 of the side valve body 2.

[0041] When the spray hole needs to be cleaned, Figure 3As shown, remove the limit pins 17 on the left and right sides, reverse the motor, and push the outer sleeve 3 forward with the screw. When the spray hole covers the water inlet annular port 8 area, backwashing can be achieved under the action of high-pressure water flow. In addition, due to the tapered design of the tapered hole 5, which is large outside and small inside, during backwashing, the water flows in from the small port and out from the large port, so it is easy to clean, the backwashing consumes less water, and the efficiency is higher. In addition, two to three inspection ports 18 are opened in the outer circumferential direction of the large-diameter cylinder to clean the garbage that is not easy to wash on the tapered hole of the outer sleeve 3 without disassembling the valve during the overhaul period.

Claims

1. A sleeve type control valve, characterized in that: include: Main valve body (1): a two-stage embedded cylindrical structure with different diameters, including an integrally formed small-diameter inner cylinder and a large-diameter outer cylinder; Fixed cone (4): fixedly mounted on the axis inside the main valve body (1) to form an annular flow channel of the main valve body; The side valve body (2) is a stepped structure with a larger front and a smaller rear portion, comprising an integrally formed front opening portion and a rear straight tube portion, wherein the front opening portion is fixedly connected to the rear end of the outer tube via a flange, and the straight flow channel of the rear straight tube portion is connected to the annular flow channel of the main valve body; The outer sleeve (3) comprises a front end flow channel portion and a rear end closing portion, and a plurality of flow channel holes are provided on the surface of the front end flow channel portion. The front end flow channel portion is covered on the rear part of the fixed cone (4), and the rear end closing portion is covered on the rear straight tube portion, and moves back and forth along the axis to realize opening and closing of the flow channel; A driving device: installed above the side valve body (2) to drive the outer sleeve (3) to move back and forth; When the valve is in an open state, the outer sleeve (3) is located in the open position, and the front end flow channel portion of the outer sleeve (3) is located at the annular flow position formed by the front opening of the side valve body (2) and the rear part of the fixed cone (4). After the water flows along the annular opening (8) formed between the fixed cone (4) and the inner wall of the main valve body (1), it enters the front opening of the side valve body (2) and enters the outer sleeve (3) and the rear straight tube portion through the flow channel hole on the outer sleeve (3); When the valve is in a closed state, the outer sleeve (3) is located in a closed position, and the rear end sealing portion of the outer sleeve (3) is located at the annular flow position formed by the front opening of the side valve body (2) and the rear part of the fixed cone (4), thereby blocking the flow passage; When the valve is in a backwashing state, the outer sleeve (3) is located at the backwashing position, the front end flow channel portion of the outer sleeve (3) is located at the annular opening (8) formed between the fixed cone (4) and the inner wall of the main valve body (1), and the rear end sealing portion is fitted and sealed with the rear part of the fixed cone (4).

2. A sleeve type control valve according to claim 1, characterized in that: The flow channel hole is a tapered hole (5), and the outer diameter of the tapered hole (5) is greater than the inner diameter.

3. A sleeve type control valve according to claim 1, characterized in that: The fixed cone (4) is composed of mutually connected cross guide ribs and a cone with straight cylindrical edges. The cross guide ribs are installed inside the small diameter inner cylinder, and the front end of the outer sleeve (3) is sleeved on the rear of the cone with straight cylindrical edges.

4. A sleeve type control valve according to claim 1, characterized in that: The driving device comprises an electric actuator (12), a Y-shaped double-bevel gearbox (11) which are sequentially connected in transmission, and two sets of driving mechanisms which are respectively connected to the Y-shaped double-bevel gearbox (11) and are symmetrically arranged on the left and right, and each set of driving mechanisms is respectively connected to the outer sleeve (3) via a thrust ear (6).

5. A sleeve type control valve according to claim 4, characterized in that: Each set of driving mechanisms is composed of a universal coupling (15), a transmission rod (14), a bevel gear box (10) and a screw assembly (9) which are driven in sequence. The front end of the screw assembly (9) is connected to a thrust ear (6) and is locked by a nut (13).

6. A sleeve type control valve according to claim 4, characterized in that: The side valve body (2) is symmetrically provided with a rib frame on the outside, and a removable limit pin (17) is provided on the rib frame to limit the stroke of the screw assembly.

7. A sleeve type control valve according to claim 1, characterized in that: A plurality of inspection ports (18) are provided on the outer circumference of the large-diameter outer cylinder of the main valve body (1).

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