阅读说明：本技术 零摩擦指挥器压力调节阀及压力调节方法 (Zero-friction director pressure regulating valve and pressure regulating method ) 是由 未翠月 李生龙 于 2021-07-28 设计创作，主要内容包括：本发明涉及一种零摩擦指挥器压力调节阀,包括：设有主阀座、进口孔和出口孔的主阀体,设有由主膜片分隔构成的执行上腔和执行下腔的执行壳体,上端与主膜片连接的主阀杆,指挥器,设于主阀座下侧且与主阀杆下端连接的主阀芯,装于主阀杆上且托住主膜片下端的托盘,上端与托盘下端连接的侧圈,两端一一对应压住托盘下端和执行下腔下端的执行压簧,设有大端位于上侧的阶梯中孔且与主阀座上端连接的阀盖,套在主阀杆外且装于阶梯中孔大端中的上滑套、与阀盖下端连接的下滑套,设于阀盖侧围且与阶梯中孔小端和出口分别连通的侧连通孔,若干个设于上滑套上且与阶梯中孔小端和执行下腔分别连通的轴向连通孔。(The invention relates to a zero friction director pressure regulating valve, comprising: a main valve body provided with a main valve seat, an inlet hole and an outlet hole, an execution shell provided with an execution upper cavity and an execution lower cavity which are formed by dividing a main diaphragm, a main valve rod with the upper end connected with the main diaphragm, a director, a main valve core which is arranged at the lower side of the main valve seat and connected with the lower end of the main valve rod, a tray which is arranged on the main valve rod and supports the lower end of the main diaphragm, a side ring with the upper end connected with the lower end of the tray, execution pressure springs with two ends correspondingly pressing the lower end of the tray and the lower end of the execution lower cavity, a valve cover which is provided with a step middle hole with the big end positioned at the upper side and connected with the upper end of the main valve seat, and an upper sliding sleeve which is sleeved outside the main valve rod and is arranged in the big end of the step middle hole, the lower sliding sleeve is connected with the lower end of the valve cover, the side communication holes are formed in the side wall of the valve cover and are respectively communicated with the small end of the stepped middle hole and the outlet, and the axial communication holes are formed in the upper sliding sleeve and are respectively communicated with the small end of the stepped middle hole and the execution lower cavity.)

1. A zero-friction pilot pressure regulator valve comprising: the main valve body with main valve seat, inlet hole and outlet hole, the execution casing with execution upper chamber and execution lower chamber that constitutes by the main diaphragm is equipped with, the main valve pole that the upper end is connected with the main diaphragm, the commander, characterized by, zero friction commander pressure regulating valve still include: the main valve comprises a main valve seat, a main valve core, a tray, an execution pressure spring, a valve cover, an upper sliding sleeve, a lower sliding sleeve, a side communication hole and a plurality of axial communication holes, wherein the main valve core is arranged on the lower side of the main valve seat and connected with the lower end of a main valve rod, the tray is arranged on the main valve rod and supports the lower end of a main diaphragm, two ends of the execution pressure spring press the lower end of the tray and the lower end of an execution lower cavity in a one-to-one correspondence mode, the valve cover is provided with a step middle hole, the large end of the step middle hole is located on the upper side of the valve cover and connected with the upper end of the main valve seat, the upper sliding sleeve is sleeved outside the main valve rod and arranged in the large end of the step middle hole, the lower sliding sleeve is connected with the lower end of the step middle hole, the side communication hole is arranged on the side wall of the valve cover and is respectively communicated with the small end of the step middle hole and the execution lower cavity.

2. The zero-friction pilot pressure regulator of claim 1, wherein said pilot comprises: the pilot valve comprises a pilot upper cavity, a pilot lower cavity, two pressure plates, a pilot valve rod, a pilot valve core, a guide sleeve, a housing, a baffle disc, a three-way needle valve, a pilot pressure spring and a three-way needle valve, wherein the pilot upper cavity and the pilot upper cavity are arranged on the upper side of the pilot valve cavity; the auxiliary valve cavity is communicated with the inlet hole through a connecting pipe, and the upper cavity is communicated with the inlet hole through a communicating pipe.

3. The zero-friction pilot pressure regulator of claim 2, wherein said pilot further comprises: a pressure reducing valve connected in series with the connecting pipe.

4. The zero-friction director pressure regulating valve of claim 1, 2 or 3 further comprising: the two ends of the pressing ring press the upper end of the main valve seat and the lower end of the valve cover in a one-to-one correspondence mode, and the plurality of pressing rings are circumferentially distributed in side through holes of side walls of the pressing rings.

5. The zero-friction pilot pressure regulator valve according to claim 1, 2 or 3, wherein said actuator housing comprises: the lower execution shell presses the main diaphragm and is detachably connected with the upper execution shell.

6. A zero-friction pilot pressure regulator valve according to claim 2 or 3, wherein said pilot housing comprises: the lower commanding shell presses the auxiliary diaphragm and is detachably connected with the lower commanding shell.

7. A pressure regulating method of zero friction pilot pressure regulating valve, the said zero friction pilot pressure regulating valve is the zero friction pilot pressure regulating valve of any claim 1 to claim 6, characterized by that, (1) different from the main valve core of the traditional pilot pressure regulating valve of the pilot pressure in the upper side of main valve seat, the main valve core of the zero friction pilot pressure regulating valve is mounted upside down in the lower side of main valve seat, the main valve core moves downward while opening, the outlet port is communicated with execution cavity through side intercommunicating pore, step middle hole tip, axial intercommunicating pore and step middle hole tip, the valve bonnet, upper sliding sleeve and lower sliding sleeve and main valve stem do not need the seal ring to seal, there is no running friction between valve stem and valve bonnet; (2) the medium with the pressure (P1) before the valve is introduced into an auxiliary valve cavity of an auxiliary valve body through the pressure regulation of a pressure reducing valve, after the medium is regulated by a valve port between an auxiliary valve core and an auxiliary valve and enters a three-way needle valve, one path of the medium flows into an execution upper cavity, the pressure is (P3), the other path of the medium flows into an execution lower cavity, the pressure is (P4), because (P3) > (P4), a main diaphragm pushes a main valve core to move downwards to open a set opening, the medium flows from an inlet hole to an outlet hole, and the pressure of the medium after the valve is reduced to (P2); (3) (P2) feeding back to the command upper cavity when the valve is enlarged, enabling the auxiliary valve rod to move downwards under the action of the auxiliary diaphragm, and feeding back to the command upper cavity when the valve is reduced, enabling the auxiliary valve rod to move upwards under the action of the auxiliary diaphragm, enabling the pressure of a medium entering the three-way needle valve to be adjusted, enabling the pressure difference between (P3) and (P4) to change, and accordingly adjusting the opening degree of the main valve core and enabling the pressure (P2) behind the valve to be stable; (4) the set opening degree of the main valve core can be adjusted by adjusting the pressure of the pressure reducing valve.

Technical Field

The invention relates to the technical field of valves, in particular to a zero-friction director pressure regulating valve and a pressure regulating method.

Background

The pressure regulating valve of self-operated director is a valve which can automatically regulate pressure according to the requirement of set value by using the pressure change of the regulated medium as power without external driving energy. The utility model discloses a self-operated pilot pressure regulating valve for controlling micro-positive pressure, which comprises a valve body, a valve seat, a main valve core, a valve rod, a valve cover, an actuating mechanism and a pilot, wherein the pilot comprises an auxiliary valve body fixedly arranged on the actuating mechanism, an auxiliary valve seat is fixedly arranged in the auxiliary valve body, an auxiliary valve rod is inserted in the auxiliary valve seat, the top of the auxiliary valve rod is connected with a pilot membrane in the pilot, and an auxiliary valve core capable of being matched with the auxiliary valve seat is arranged at the bottom of the auxiliary valve rod; the main valve core of the self-operated pilot valve is positioned on the upper side of the valve seat, and a sealing ring is arranged between the valve rod and the valve cover for preventing leakage. Because the post-valve pressure P2 controlled by the pressure regulating valve of the self-operated director is low, the lowest pressure is about 0.5-1 KPa generally, even if a 600 square diaphragm is adopted, the thrust generated by the medium pressure is 30-60N, the calculation is carried out according to the control precision of the director of 5%, the kinetic friction force must be less than (30-60) × 5% = 1.5-3N, even if an O-shaped ring is adopted for sealing between the valve rod and the valve cover, the low kinetic friction force is difficult to achieve, the control precision of the valve is difficult to ensure, the kinetic friction force between the valve rod and the valve cover is large, the up-and-down movement of the main valve core is seriously influenced, and the poor control precision of the post-valve pressure P2 is caused; therefore, it is a problem to be solved urgently to design a zero-friction pilot pressure regulating valve and a pressure regulating method, wherein the zero-friction pilot pressure regulating valve has zero moving friction between a valve rod and a valve cover, does not influence the up-and-down movement of a main valve core, and has better control precision of the pressure P2 after the valve.

Disclosure of Invention

The invention aims to overcome the defect that the control precision of the pressure P2 after the valve is poor due to the fact that the movement friction force between a valve rod and a valve cover is large and the up-and-down movement of a main valve core is seriously influenced in the conventional self-operated pressure regulating valve of a pilot valve, and provides a zero-friction pilot valve and a pressure regulating method which have no friction between the valve rod and the valve cover, do not influence the up-and-down movement of the main valve core and have good control precision of the pressure P2 after the valve.

The specific technical scheme of the invention is as follows:

a zero-friction pilot pressure regulator valve comprising: a main valve body provided with a main valve seat, an inlet hole and an outlet hole, an execution shell provided with an execution upper cavity and an execution lower cavity which are formed by dividing a main diaphragm, a main valve rod with the upper end connected with the main diaphragm, a director, a main valve core which is arranged at the lower side of the main valve seat and connected with the lower end of the main valve rod, a tray which is arranged on the main valve rod and supports the lower end of the main diaphragm, a side ring with the upper end connected with the lower end of the tray, execution pressure springs with two ends correspondingly pressing the lower end of the tray and the lower end of the execution lower cavity, a valve cover which is provided with a step middle hole with the big end positioned at the upper side and connected with the upper end of the main valve seat, and an upper sliding sleeve which is sleeved outside the main valve rod and is arranged in the big end of the step middle hole, the lower sliding sleeve is connected with the lower end of the valve cover, the side communication holes are formed in the side wall of the valve cover and are respectively communicated with the small end of the stepped middle hole and the outlet, and the axial communication holes are formed in the upper sliding sleeve and are respectively communicated with the small end of the stepped middle hole and the execution lower cavity.

Preferably, the director comprises: the auxiliary valve comprises an auxiliary valve cavity, an auxiliary valve seat arranged on the upper side of the auxiliary valve cavity and an auxiliary valve body connected with the upper end of an execution shell, a command upper cavity and a command lower cavity which are formed by dividing an auxiliary diaphragm, two pressure plates which press the upper end and the lower end of the auxiliary diaphragm in a one-to-one correspondence manner, an auxiliary valve rod which is arranged in the command shell in a penetrating manner and is connected with the pressure plates, an auxiliary valve core which is arranged on the upper side of the auxiliary valve seat and is connected with the lower end of the auxiliary valve rod, a guide sleeve which is arranged on the upper end of the auxiliary valve body and is sleeved outside the auxiliary valve core, a housing of which the lower end is connected with the upper end of the command shell, a baffle disc which is arranged in the housing and is connected with the upper end of the auxiliary valve rod, and three-way needle valves which are arranged on the execution shell and are respectively communicated with the auxiliary valve cavity, the execution upper cavity and the execution lower cavity; the auxiliary valve cavity is communicated with the inlet hole through a connecting pipe, and the upper cavity is communicated with the inlet hole through a communicating pipe.

Preferably, the director further comprises: a pressure reducing valve connected in series with the connecting pipe.

Preferably, the zero-friction pilot pressure regulating valve further comprises: the two ends of the pressing ring press the upper end of the main valve seat and the lower end of the valve cover in a one-to-one correspondence mode, and the plurality of pressing rings are circumferentially distributed in side through holes of side walls of the pressing rings.

Preferably, the side through hole is a rectangular side through hole.

Preferably, the actuating housing includes: the lower execution shell presses the main diaphragm and is detachably connected with the upper execution shell.

Preferably, the command housing comprises: the lower commanding shell presses the auxiliary diaphragm and is detachably connected with the lower commanding shell.

A zero friction commander pressure regulating valve method, the said zero friction commander pressure regulating valve is the above-mentioned zero friction commander pressure regulating valve, (1) different from the main valve core of the traditional commander pressure regulating valve and installing on the upside of main valve seat, the main valve core of the zero friction commander pressure regulating valve is installed upside down on the underside of main valve seat, the main valve core moves downward when opening, the outlet port is communicated with execution cavity through side intercommunicating pore, step center hole small end, axial intercommunicating pore and step center hole large end, the valve bonnet, upper sliding sleeve and lower sliding sleeve need not seal with the seal ring between the main valve stem, there is no running friction between valve stem and the valve bonnet; (2) the medium with the pressure P1 before the valve is introduced into an auxiliary valve cavity of an auxiliary valve body through the pressure regulation of a pressure reducing valve, after the medium enters a three-way needle valve through the regulation of a valve port between an auxiliary valve core and an auxiliary valve, one path of the medium flows into an execution upper cavity, the pressure is P3, the other path of the medium flows into an execution lower cavity, the pressure is P4, as P3 is more than P4, a main diaphragm pushes the main valve core to move downwards to open a set opening, the medium flows from an inlet hole to an outlet hole, and the pressure of the medium after the valve is reduced to P2; (3) when the pressure P2 is increased, the pressure is fed back to the command upper cavity, the auxiliary valve rod moves downwards under the action of an auxiliary diaphragm, when the pressure P2 is decreased, the pressure is fed back to the command upper cavity, the auxiliary valve rod moves upwards under the action of the auxiliary diaphragm, the pressure of a medium entering the three-way needle valve is adjusted, the pressure difference between P3 and P4 is changed, and therefore the opening degree of the main valve core is adjusted, and the pressure P2 behind the valve is stabilized; (4) the set opening degree of the main valve core can be adjusted by adjusting the pressure of the pressure reducing valve.

Compared with the prior art, the invention has the beneficial effects that: the zero-friction director pressure regulating valve has no friction between the valve rod and the valve cover, does not influence the up-and-down movement of the main valve core, and has better control precision of the pressure P2 after the valve; different from the traditional pilot valve with a main valve core of a pressure regulating valve arranged on the upper side of a main valve seat, the main valve core is inversely arranged on the lower side of the main valve seat, when the pilot valve is opened, the main valve core moves downwards, an outlet hole is communicated with an execution lower cavity through a side communication hole, a small end of a stepped middle hole, an axial communication hole and a large end of the stepped middle hole, a medium with the pressure of P4 in the execution lower cavity can directly flow downwards into the outlet hole, a valve cover, an upper sliding sleeve and a lower sliding sleeve are not required to be sealed by sealing rings, and no moving friction force exists between the valve rod and the valve cover; when the pressure P2 after the valve is slightly changed, although the pressure change entering the execution upper cavity and the execution lower cavity is small, because the main valve rod has no friction force with the sealing ring, the opening degree of the main valve core can be instantly adjusted, so that the pressure P2 after the valve is stable is ensured, and the control precision of the valve is improved. The pilot comprises a pressure reducing valve connected in series with the connecting pipe, which is beneficial to adjusting the set opening of the main valve core. The two ends of the pressing ring press the upper end of the main valve seat and the lower end of the valve cover in a one-to-one correspondence manner, so that the main valve seat and the valve cover can be stably installed. The upper execution shell presses the main diaphragm and is detachably connected with the lower execution shell, so that the main diaphragm can be assembled, disassembled and replaced conveniently. The upper commanding shell presses the auxiliary diaphragm and is detachably connected with the lower commanding shell, so that the auxiliary diaphragm can be assembled, disassembled and replaced conveniently. The side ring with the upper end connected with the lower end of the tray is beneficial to improving the strength and rigidity of the tray.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

In the figure: the main valve seat 1, the inlet hole 2, the outlet hole 3, the main valve body 4, the main diaphragm 5, the actuating upper chamber 6, the actuating lower chamber 7, the main valve stem 8, the main valve plug 9, the tray 10, the side ring 11, the actuating pressure spring 12, the stepped middle hole 13, the valve cover 14, the upper sliding sleeve 15, the lower sliding sleeve 16, the side communication hole 17, the axial communication hole 18, the auxiliary valve chamber 19, the auxiliary valve seat 20, the auxiliary valve body 21, the auxiliary diaphragm 22, the commanding upper chamber 23, the commanding lower chamber 24, the pressure plate 25, the auxiliary valve stem 26, the auxiliary valve plug 27, the guide sleeve 28, the housing 29, the retaining disc 30, the commanding pressure spring 31, the three-way needle valve 32, the connecting pipe 33, the communication pipe 34, the pressure reducing valve 35, the pressure ring 36, the side communication hole 37, the lower actuating housing 38, the upper actuating housing 39, the lower commanding housing 40 and the upper commanding housing 41.

Detailed Description

The invention will be further described with reference to the drawings.

As shown in figure 1: a zero-friction pilot pressure regulator valve comprising: a main valve body 4 provided with a main valve seat 1, an inlet hole 2 and an outlet hole 3, an execution shell provided with an execution upper cavity 6 and an execution lower cavity 7 which are formed by dividing a main diaphragm 5, a main valve rod 8 with the upper end screwed with the main diaphragm 5, a director, a main valve core 9 which is arranged at the lower side of the main valve seat 1 and is screwed with the lower end of the main valve rod 8, a tray 10 which is arranged on the main valve rod 8 and holds the lower end of the main diaphragm 5, a side ring 11 with the upper end integrally connected with the lower end of the tray 10, execution pressure springs 12 with the two ends correspondingly pressing the lower end of the tray 10 and the lower end of the execution lower cavity 7, a valve cover 14 which is provided with a step central hole 13 with the big end positioned at the upper side and is screwed with the upper end of the main valve seat 1, an upper sliding sleeve 15 which is sleeved outside the main valve rod 8 and is arranged in the big end of the step central hole 13, a lower sliding sleeve 16 which is screwed with the lower end of the valve cover 14, and a side communication hole 17 which is arranged at the side of the valve cover 14 and is respectively communicated with the small end and the outlet of the step central hole 13, four axial communication holes 18 are arranged on the upper sliding sleeve 15 and are respectively communicated with the small end of the stepped middle hole 13 and the execution lower cavity 7.

The director comprises: an auxiliary valve cavity 19, an auxiliary valve seat 20 arranged on the upper side of the auxiliary valve cavity 19 and an auxiliary valve body 21 screwed with the upper end of an execution shell, a command upper cavity 23 and a command lower cavity 24 which are formed by separating an auxiliary diaphragm 22 and a command shell screwed with the upper end of the auxiliary valve body 21, two pressure plates 25 which press the upper end and the lower end of the auxiliary diaphragm 22 one by one, an auxiliary valve rod 26 which penetrates through the command shell and is screwed with the pressure plate 25, an auxiliary valve core 27 which is arranged on the upper side of the auxiliary valve seat 20 and is screwed with the lower end of the auxiliary valve rod 26, a guide sleeve 28 which is arranged on the upper end of the auxiliary valve body 21 and is sleeved outside the auxiliary valve core 27, a housing 29 of which the lower end is screwed with the upper end of the command shell, a baffle disc 30 which is arranged in the housing 29 and is screwed with the upper end of the auxiliary valve rod 26, and pressure springs 31 of which press the lower end of the baffle disc 30 and the command shell upper end one by one, are arranged on the execution shell and are respectively connected with the auxiliary valve cavity 19, a three-way needle valve 32 for communicating the execution upper chamber 6 with the execution lower chamber 7; the sub-valve chamber 19 is communicated with the inlet hole 2 through a connecting pipe 33, and the upper chamber 23 is communicated with the inlet hole 2 through a communicating pipe 34.

The director further comprises: and a pressure reducing valve 35 connected in series to the connection pipe 33.

The zero friction director pressure regulating valve still include: the two ends of the pressing ring 36 press the upper end of the main valve seat 1 and the lower end of the valve cover 14 in a one-to-one correspondence manner, and the four side through holes 37 are uniformly distributed on the side wall of the pressing ring 36 in the circumferential direction.

The side through hole 37 is a rectangular side through hole.

The execution shell comprises: a lower actuating housing 38, an upper actuating housing 39 pressing the main diaphragm 5 and screwed with the lower actuating housing 38.

The command shell comprises: a lower command case 40, an upper command case 41 pressing the sub diaphragm 22 and screwed with the lower command case 40.

A zero friction director pressure regulating valve is the zero friction director pressure regulating valve, (1) different from the main valve core 9 of the traditional director pressure regulating valve installed on the upper side of the main valve seat 1, the main valve core 9 of the zero friction director pressure regulating valve is installed upside down on the lower side of the main valve seat 1, the main valve core 9 moves downwards when opening, the outlet hole 3 is communicated with the execution lower cavity 7 through the side communicating hole 17, the small end of the step middle hole 13, the axial communicating hole 18 and the large end of the step middle hole 13, the valve cover 14, the upper sliding sleeve 15 and the lower sliding sleeve 16 are not sealed by sealing rings, and no motion friction force exists between the valve rod and the valve cover 14; (2) the medium with the pressure P1 before the valve is introduced into an auxiliary valve cavity 19 of an auxiliary valve body 21 under the pressure regulation of a pressure reducing valve 35, and after the medium enters a three-way needle valve 32 through the valve port regulation between an auxiliary valve core 27 and an auxiliary valve, one path of the medium flows into an execution upper cavity 6 with the pressure P3, the other path of the medium flows into an execution lower cavity 7 with the pressure P4, because P3 is more than P4, a main diaphragm 5 pushes a main valve core 9 to move downwards to open a set opening, the medium flows from an inlet hole 2 to an outlet hole 3, and the pressure of the medium after the valve is reduced to P2; (3) when the pressure P2 is increased, the pressure P2 is fed back to the command upper chamber 23, the auxiliary valve rod 26 moves downwards under the action of the auxiliary diaphragm 22, when the pressure P2 is decreased, the pressure P23 is fed back to the command upper chamber, the auxiliary valve rod 26 moves upwards under the action of the auxiliary diaphragm 22, the pressure of a medium entering the three-way needle valve 32 is adjusted, the pressure difference between the pressure P3 and the pressure P4 is changed, and therefore the opening degree of the main valve core 9 is adjusted, and the pressure P2 behind the valve is stabilized; (4) the set opening of main spool 9 can be adjusted by adjusting the pressure by pressure reducing valve 35.

In addition to the above embodiments, the technical features or technical data of the present invention may be reselected and combined to form new embodiments within the scope of the claims and the specification of the present invention, which are all realized by those skilled in the art without creative efforts, and thus, the embodiments of the present invention not described in detail should be regarded as specific embodiments of the present invention and are within the protection scope of the present invention.