High-precision flow regulating valve convenient to overhaul

Abstract

The utility model belongs to the technical field of regulating valves, and particularly relates to a high-precision flow regulating valve convenient to overhaul, which comprises a valve body, a valve cover, a valve seat and a valve head which are used for the high-precision flow regulating valve, a dismounting mechanism is arranged between the valve seat and the valve body, and a connecting piece is arranged on the outer side of the valve cover and the outer side of the valve body. The valve cover is fixedly connected to the top of the valve body through a connecting piece, a hydraulic cylinder is fixedly connected to the top of the valve cover, a valve rod is fixedly connected to an output shaft of the hydraulic cylinder, a fixing mechanism is arranged between the valve rod and the valve head, and the valve head is sleeved with the valve seat in a sliding and sealing mode. The regulating valve is reasonable in structural design, through the arrangement of the connecting piece, the valve cover and the valve body can be conveniently mounted and dismounted, later maintenance work of the regulating valve is facilitated, meanwhile, the valve head and the valve seat can be conveniently dismounted, mounted and replaced regularly, and the situation that water leaks under the closed condition due to the fact that the valve head and the valve seat are greatly abraded after long-time use is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a high-precision flow regulating valve that is easy to repair. Background Art

[0002] With the rapid development of social economy, the use of regulating valves is increasing. Regulating valves, also known as control valves, are the final control elements in the field of industrial automation process control. They receive the control signal output by the regulating control unit and use power operation to change the process parameters such as medium flow, pressure, temperature, and liquid level. They are generally composed of actuators and valves. According to the stroke characteristics, regulating valves can be divided into straight stroke and angular stroke; according to the power used by the actuators, they can be divided into three types: pneumatic regulating valves, electric regulating valves, and hydraulic regulating valves. Regulating valves are suitable for air, water, steam, various corrosive media, mud, oil and other media.

[0003] After searching: Patent number CN108591486A is a valve core and valve seat structure for a small flow and high-precision regulating valve and its adjustment method, including a valve cover, a valve body, a valve stem, a valve core and a valve seat, wherein a valve stem is provided in the middle cavity of the valve cover, and a cylindrical valve core is integrally provided at the lower end of the valve stem, a sharp angle groove inclined at 5° is opened on the valve core, and a valve seat is fixedly installed in the middle cavity of the valve body by welding, and the valve seat is sealed with a polytetrafluoroethylene inner ring. And patent number CN114076199A is an improved steam flow regulating valve, which relates to the technical field of regulating valves and solves the problems that the sealing structure of the existing regulating valve is easily affected by high temperature during the steam flow regulation process, resulting in poor sealing effect, short service life, and low adjustment accuracy. An improved steam flow regulating valve includes a sealing maintenance mechanism, and an auxiliary support mechanism is installed on the inner side of the sealing maintenance mechanism.

[0004] However, the high-precision flow control valve mentioned above still has some shortcomings. The installation and disassembly between the valve body and the valve cover are troublesome and inconvenient, which is not conducive to the later inspection and maintenance of the components inside. At the same time, it is not convenient to regularly disassemble and replace the valve head and valve seat that are severely worn. After long-term use, it is easy to leak in the closed state due to severe wear. Therefore, we propose a high-precision flow control valve that is easy to inspect and maintain to solve the above problems. Utility Model Content

[0005] The utility model aims to solve the above-mentioned shortcomings and proposes a high-precision flow control valve which is easy to maintain.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A high-precision flow regulating valve that is easy to maintain, comprising a valve body, a valve cover, a valve seat and a valve head used for the high-precision flow regulating valve, a disassembly and assembly mechanism is arranged between the valve seat and the valve body, a connecting piece is arranged between the valve cover and the outer side of the valve body, the valve cover is fixedly connected to the top of the valve body through the connecting piece, a hydraulic cylinder is fixedly connected to the top of the valve cover, a valve stem is fixedly connected to the output shaft of the hydraulic cylinder, a fixing mechanism is arranged between the valve stem and the valve head, and the valve head sliding sealing sleeve is arranged in the valve seat.

[0008] Preferably, the inlet and outlet of the valve body are both fixedly connected with connecting flanges.

[0009] Preferably, the connecting member includes a left clip, the rear side of the left clip is rotatably connected to a right clip, the front side of the left clip is fixedly connected to a left connecting plate, the front side of the right clip is fixedly connected to a right connecting plate, and the right connecting plate and the left connecting plate are threadedly connected by the same bolt.

[0010] Preferably, the valve body and the valve cover are movably mounted between the left clamping piece and the right clamping piece.

[0011] Preferably, the inner sides of the left clamping piece and the right clamping piece are fixedly connected with sealing gaskets, and the two sealing gaskets are movably abutted against the outer sides of the valve body and the valve cover.

[0012] Preferably, the disassembly and assembly mechanism includes a placement seat fixedly sleeved in the valve body and four fixing screws threadedly connected to the outside of the valve body. The valve seat is movably placed on the top of the placement seat. Thread grooves are provided around the outside of the valve seat. The four fixing screws are respectively threadedly connected to the corresponding thread grooves. A sealing ring is fixedly connected to the inner side of the valve seat, and the sealing ring movably abuts against the outer side of the valve head.

[0013] Preferably, the fixing mechanism comprises a mounting plate fixedly connected to the bottom end of the valve stem, the top of the mounting plate is threadedly connected with two screws, and the mounting plate is fixedly connected to the top of the valve head by the two screws.

[0014] Preferably, a sealing ring is fixedly connected to the bottom of the valve cover, and the valve stem sliding sealing sleeve is arranged in the sealing ring.

[0015] The utility model discloses a kind of high-precision flow control valve which is easy to repair. When it needs to be repaired and maintained, the bolts are unscrewed, and the left and right connecting plates are not fixed, and the left and right clamping pieces are not fixed. At this time, the left and right clamping pieces can be opened and removed from the outside of the valve cover and the valve body, and the valve cover can be disassembled from the valve body, so that the components in the valve body can be repaired and maintained, and at the same time, it is convenient to repair and maintain the hydraulic cylinder on the valve cover. When disassembling, the valve stem and the valve head are also pulled out of the valve body. The arrangement of the mounting plate and the screws facilitates the regular disassembly and replacement of the valve head. The arrangement of the four fixing screws and the threaded grooves facilitates the disassembly and assembly of the valve seat, and the valve seat can be regularly maintained. At the same time, it facilitates the replacement of the sealing ring with greater wear, so as to avoid the situation that water leakage occurs in the closed state due to the greater wear of the valve head and the valve seat after long-term use.

[0016] In the utility model, the high-precision flow regulating valve which is easy to repair is described. After maintenance, the valve head is installed on the mounting plate and the valve stem by screws, and the valve seat is placed on the top of the placement seat, and the valve seat is fixed by setting the fixing screw and the thread groove, and finally the valve cover is placed on the top of the valve body, and the left and right clips are buckled on the outside of the valve cover and the valve body, and the bolts are tightened to fix the left and right clips on the outside of the valve cover and the valve body, and then the valve cover can be fixed on the top of the valve body under the action of the connecting piece, and the connection between the valve cover and the valve body can be sealed by setting the sealing gasket to avoid water leakage;

[0017] The utility model discloses the structure is reasonably designed, and the setting of the connecting piece is conducive to the installation and disassembly of the valve cover and the valve body, thereby facilitating the later inspection and maintenance of the regulating valve, and is also conducive to the regular disassembly and replacement of the valve head and the valve seat, so as to avoid water leakage in the closed state due to the large wear of the valve head and the valve seat during long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of a high-precision flow control valve that is easy to repair proposed by the utility model;

[0019] Figure 2 for Figure 1 The structural diagram of part A in the figure;

[0020] Figure 3 A three-dimensional diagram of a valve stem, a valve head and a valve seat of a high-precision flow control valve that is easy to repair proposed by the utility model;

[0021] Figure 4 A cross-sectional view of a high-precision flow control valve that is easy to repair proposed by the utility model;

[0022] Figure 5 for Figure 4 Schematic diagram of the structure of part B.

[0023] In the figure: 1. valve body; 2. hydraulic cylinder; 3. connecting piece; 4. fixing screw; 5. connecting flange; 6. valve cover; 7. valve stem; 8. sealing ring; 9. left clamp; 10. right clamp; 11. left connecting plate; 12. right connecting plate; 13. bolt; 14. valve head; 15. screw; 16. mounting plate; 17. valve seat; 18. placement seat; 19. threaded groove; 20. sealing ring; 21. sealing gasket. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0025] Reference Figure 1-5 A high-precision flow control valve that is easy to maintain, comprising a valve body 1, a valve cover 6, a valve seat 17 and a valve head 14 used for the high-precision flow control valve, a disassembly mechanism is arranged between the valve seat 17 and the valve body 1, a connecting piece 3 is arranged on the outside of the valve cover 6 and the valve body 1, the valve cover 6 is fixedly connected to the top of the valve body 1 through the connecting piece 3, a hydraulic cylinder 2 is fixedly connected to the top of the valve cover 6, a valve stem 7 is fixedly connected to the output shaft of the hydraulic cylinder 2, a fixing mechanism is arranged between the valve stem 7 and the valve head 14, and a sliding sealing sleeve of the valve head 14 is arranged in the valve seat 17.

[0026] Furthermore, the inlet and outlet of the valve body 1 are fixedly connected with connecting flanges 5 .

[0027] Furthermore, the connecting member 3 includes a left clamping piece 9, the rear side of the left clamping piece 9 is rotatably connected to the right clamping piece 10, the front side of the left clamping piece 9 is fixedly connected to the left connecting plate 11, the front side of the right clamping piece 10 is fixedly connected to the right connecting plate 12, the right connecting plate 12 and the left connecting plate 11 are threadedly connected with the same bolt 13, the valve body 1 and the valve cover 6 are movably sleeved between the left clamping piece 9 and the right clamping piece 10, when inspection and maintenance are required, the bolt 13 is unscrewed, and the left and right connecting plates are not fixed, and the left and right clamps are not fixed. At this time, the left and right clips can be opened and removed from the outside of the valve cover 6 and the valve body 1, and the valve cover 6 can be disassembled from the valve body 1 to facilitate the inspection and maintenance of the regulating valve, and at the same time facilitate the inspection and maintenance of the hydraulic cylinder 2 on the valve cover 6. After the inspection and maintenance, the valve cover 6 is placed on the top of the valve body 1, and the left and right clips are buckled on the outside of the valve cover 6 and the valve body 1. The bolts 13 are tightened to fix the left and right clips on the outside of the valve cover 6 and the valve body 1, and then the valve cover 6 can be fixed to the top of the valve body 1 under the action of the connecting piece 3.

[0028] Furthermore, a sealing gasket 21 is fixedly connected to the inner side of the left clamp 9 and the right clamp 10, and the two sealing gaskets 21 are movably abutted against the outer sides of the valve body 1 and the valve cover 6. Through the provision of the sealing gasket 21, the connection sealing between the valve body 1 and the valve cover 6 is improved to prevent water leakage.

[0029] Furthermore, the disassembly and assembly mechanism includes a placement seat 18 fixedly sleeved in the valve body 1 and four fixing screws 4 threadedly connected to the outer side of the valve body 1. The valve seat 17 is movably placed on the top of the placement seat 18. Thread grooves 19 are provided around the outer side of the valve seat 17. The four fixing screws 4 are respectively threadedly connected in the corresponding thread grooves 19. A sealing ring 20 is fixedly connected to the inner side of the valve seat 17. The sealing ring 20 movably abuts against the outer side of the valve head 14. The setting of the placement seat 18 facilitates the placement of the valve seat 17. The setting of the fixing screws 4 and the thread grooves 19 facilitates the disassembly, assembly and replacement of the valve seat 17.

[0030] Furthermore, the fixing mechanism includes a mounting plate 16 fixedly connected to the bottom end of the valve stem 7, and two screws 15 are threadedly connected to the top of the mounting plate 16. The mounting plate 16 is fixedly connected to the top of the valve head 14 by the two screws 15. The arrangement of the mounting plate 16 and the two screws 15 facilitates the installation and disassembly of the valve stem 7.

[0031] Furthermore, a sealing ring 8 is fixedly connected to the bottom of the valve cover 6, and a sliding sealing sleeve of the valve stem 7 is arranged in the sealing ring 8, which is beneficial to sealing the connection between the valve stem 7 and the valve cover 6 to avoid water leakage, and is also beneficial to guiding the valve stem 7 to make its movement more stable.

[0032] In the utility model, when in use, the output shaft of the hydraulic cylinder 2 can drive the valve stem 7 to rise and fall, and the rise and fall of the valve stem 7 drives the rise and fall of the valve head 14, so that the cross-sectional area of ​​the valve head 14 blocking the valve seat 17 can be adjusted, so that the liquid flow rate can be adjusted. When inspection and maintenance are needed, the bolts 13 are unscrewed, so that the left and right connecting plates are not fixed, and the left and right clamps are not fixed. At this time, the left and right clamps can be opened and removed from the outside of the valve cover 6 and the valve body 1, and the valve cover 6 can be removed from the valve body 1, so as to inspect and maintain the components in the valve body 1, and at the same time, it is convenient to inspect and maintain the hydraulic cylinder 2 on the valve cover 6. When disassembling, the valve stem 7 and the valve head 14 are also pulled out of the valve body 1. Through the arrangement of the mounting plate 16 and the screw 15, it is convenient to regularly disassemble and replace the valve head 14. Through the arrangement of the four fixing screws 4 and the threaded grooves 19, it is convenient to install the valve seat 1 7 can be disassembled and assembled, and the valve seat 17 can be maintained regularly, and the sealing ring 20 with greater wear can be replaced to avoid water leakage in the closed state due to greater wear of the valve head 14 and the valve seat 17 during long-term use. After maintenance, the valve head 14 is installed on the mounting plate 16 and the valve stem 7 through the screws 15, and the valve seat 17 is placed on the top of the placement seat 18, and the valve seat 17 is fixed by the setting of the fixing screw 4 and the threaded groove 19. Finally, the valve cover 6 is placed on the top of the valve body 1, and the left and right clips are buckled on the outside of the valve cover 6 and the valve body 1. The bolts 13 can be tightened to fix the left and right clips on the outside of the valve cover 6 and the valve body 1, and then under the action of the connecting member 3, the valve cover 6 can be fixed on the top of the valve body 1, and the connection between the valve cover 6 and the valve body 1 can be sealed by the setting of the sealing gasket 21 to avoid water leakage.

Claims

1. A high-precision flow control valve that is easy to maintain, characterized in that: The invention comprises a valve body (1), a valve cover (6), a valve seat (17) and a valve head (14) for use in a high-precision flow control valve, wherein a disassembly mechanism is arranged between the valve seat (17) and the valve body (1), a connecting piece (3) is arranged on the outer sides of the valve cover (6) and the valve body (1), the valve cover (6) is fixedly connected to the top of the valve body (1) via the connecting piece (3), the top of the valve cover (6) is fixedly connected to a hydraulic cylinder (2), the output shaft of the hydraulic cylinder (2) is fixedly connected to a valve stem (7), a fixing mechanism is arranged between the valve stem (7) and the valve head (14), and a sliding sealing sleeve of the valve head (14) is arranged in the valve seat (17).

2. The high-precision flow control valve that is easy to maintain according to claim 1 is characterized in that: The inlet and outlet of the valve body (1) are both fixedly connected with connecting flanges (5).

3. The high-precision flow control valve that is easy to maintain according to claim 1 is characterized in that: The connecting member (3) comprises a left clamp (9), the rear side of the left clamp (9) is rotatably connected to a right clamp (10), the front side of the left clamp (9) is fixedly connected to a left connecting plate (11), the front side of the right clamp (10) is fixedly connected to a right connecting plate (12), and the right connecting plate (12) and the left connecting plate (11) are threadedly connected by a same bolt (13).

4. The high-precision flow control valve that is easy to maintain according to claim 3 is characterized in that: The valve body (1) and the valve cover (6) are both movably sleeved between the left clamping piece (9) and the right clamping piece (10).

5. The high-precision flow control valve that is easy to maintain according to claim 3 is characterized in that: The inner sides of the left clamping piece (9) and the right clamping piece (10) are both fixedly connected with sealing gaskets (21), and the two sealing gaskets (21) are movably abutted against the outer sides of the valve body (1) and the valve cover (6).

6. The high-precision flow control valve that is easy to maintain according to claim 1 is characterized in that: The disassembly and assembly mechanism comprises a placement seat (18) fixedly sleeved in the valve body (1) and four fixing screws (4) threadedly connected to the outer side of the valve body (1); the valve seat (17) is movably placed on the top of the placement seat (18); thread grooves (19) are provided around the outer side of the valve seat (17); the four fixing screws (4) are respectively threadedly connected in the corresponding thread grooves (19); a sealing ring (20) is fixedly connected to the inner side of the valve seat (17); and the sealing ring (20) is movably abutted against the outer side of the valve head (14).

7. The high-precision flow control valve that is easy to maintain according to claim 1 is characterized in that: The fixing mechanism comprises a mounting plate (16) fixedly connected to the bottom end of the valve stem (7), the top of the mounting plate (16) being threadedly connected to two screws (15), and the mounting plate (16) being fixedly connected to the top of the valve head (14) via the two screws (15).

8. The high-precision flow control valve that is easy to maintain according to claim 1 is characterized in that: A sealing ring (8) is fixedly connected to the bottom of the valve cover (6), and a sliding sealing sleeve of the valve stem (7) is arranged inside the sealing ring (8).

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