阅读说明：本技术 一种气动或液动单座调节阀 (Pneumatic or hydraulic single-seat regulating valve ) 是由 周永竖 于 2019-10-15 设计创作，主要内容包括：本发明公开了一种气动或液动单座调节阀,包括有阀体、阀盖和阀杆,阀体内设有进口通道和出口通道,进口通道与出口通道通过中心流道相连通,其特征在于：中心流道外周对应的阀体上由内到外依次设有第一腔体、第二腔体、第三腔体和第四腔体；所述阀座可上下移动设置在第一腔体内,且阀座上端可移动伸出第一腔体,阀座下端设有台阶,台阶将第一腔体分隔为密闭的上活塞腔与下活塞腔,上活塞腔与进口通道相连通,下活塞腔与出口通道相连通；第二腔体内转动设有刮套,刮套设有内腔,内腔里设有可上下移动的推杆,刮套上部内置有可左右移动的刮头；第三腔体内设有控制套、转换套；第四腔体内设有可上下浮动的切换杆。本发明有效防止密封副堵塞与损坏。(The invention discloses a pneumatic or hydraulic single-seat regulating valve, which comprises a valve body, a valve cover and a valve rod, wherein an inlet channel and an outlet channel are arranged in the valve body, and the inlet channel and the outlet channel are communicated through a central flow passage, and the pneumatic or hydraulic single-seat regulating valve is characterized in that: a first cavity, a second cavity, a third cavity and a fourth cavity are sequentially arranged on the valve body corresponding to the periphery of the central flow passage from inside to outside; the valve seat can move up and down and is arranged in the first cavity, the upper end of the valve seat can movably extend out of the first cavity, the lower end of the valve seat is provided with a step, the step divides the first cavity into an upper closed piston cavity and a lower closed piston cavity, the upper piston cavity is communicated with the inlet channel, and the lower piston cavity is communicated with the outlet channel; a scraping sleeve is rotatably arranged in the second cavity and is provided with an inner cavity, a push rod capable of moving up and down is arranged in the inner cavity, and a scraping head capable of moving left and right is arranged in the upper part of the scraping sleeve; a control sleeve and a conversion sleeve are arranged in the third cavity; a switching rod capable of floating up and down is arranged in the fourth cavity. The invention effectively prevents the sealing pair from being blocked and damaged.)

1. The utility model provides a pneumatic or single seat governing valve that surges, including valve body, valve gap and valve rod, be equipped with inlet channel and exit channel in the valve body, inlet channel is linked together through central runner with exit channel, and central runner department is equipped with and forms sealed vice disk seat and valve clack, and the valve clack reciprocates by the valve rod drive, its characterized in that: a first cavity, a second cavity, a third cavity and a fourth cavity are sequentially arranged on the valve body corresponding to the periphery of the central flow passage from inside to outside; the valve seat can be vertically moved and arranged in the first cavity, the upper end of the valve seat can movably extend out of the first cavity, the lower end of the valve seat is provided with a step, the step divides the first cavity into an upper closed piston cavity and a lower closed piston cavity, the upper piston cavity is communicated with the inlet channel, the lower closed piston cavity is communicated with the outlet channel, and a first compression spring is connected between the lower end of the valve seat and the bottom of the first cavity; a scraping sleeve is rotatably arranged in the second cavity, the scraping sleeve is provided with an inner cavity, a push rod capable of moving up and down is arranged in the inner cavity, an upward inclined driving inclined plane is arranged on the right side surface of the push rod, a second compression spring is connected between the upper end of the push rod and the upper end of the inner cavity of the scraping sleeve, the upper end of the inner cavity of the scraping sleeve is communicated with an outlet channel, a right lower through hole is arranged at the lower end of the scraping sleeve, when the valve seat moves down, the right lower through hole is communicated with an upper piston cavity and the inner cavity of the scraping sleeve, a scraping head capable of moving left and right is arranged in the upper part of the scraping sleeve, a reset spring is connected to the scraping head, the right end of the scraping head can extend towards the flow channel direction; a control sleeve and a conversion sleeve are arranged in the third cavity, the control sleeve is fixedly arranged, the conversion sleeve can rotate and is arranged in the control sleeve in a vertically moving mode, a spiral groove is formed in the control sleeve, a pushing head is arranged in the spiral groove and is connected with the conversion sleeve, a clamping block is arranged on the inner side of the conversion sleeve, an extending portion extending into the third cavity is arranged on the left side of the scraping sleeve, a clamping groove is formed in the extending portion, and the clamping groove is matched with the clamping block in an axial sliding and circumferential transmission mode; a switching rod capable of floating up and down is arranged in the fourth cavity, a third compression spring is connected between the upper end of the switching rod and the upper end of the fourth cavity, the upper end of the fourth cavity is communicated with the outlet channel, the lower end of the fourth cavity is communicated with the inlet channel, the valve body is provided with a left upper through hole which penetrates through the outside, the fourth cavity and the top of the spiral groove, and a left lower through hole which penetrates through the outside, the fourth cavity and the bottom of the spiral groove, the switching rod is provided with a first communicating hole, a second communicating hole, a third communicating hole and a fourth communicating hole, when the switching rod moves upwards, the second communicating hole is matched with the upper left through hole to communicate the outside with the top of the spiral groove, the fourth communicating hole is matched with the lower left through hole to communicate the inlet channel with the bottom of the spiral groove, when the switching rod moves downwards, the first communicating hole is matched with the upper left through hole to communicate the outlet channel with the top of the spiral groove, and the third communicating hole is matched with the lower left through hole to communicate the outside with the bottom of the spiral groove.

2. The pneumatic or hydraulic single seat regulating valve according to claim 1, characterized in that: the lower piston cavity is communicated with the outlet channel through the right through hole, the communicating pipe is arranged on the step at the lower end of the valve seat in a penetrating mode, the upper end of the communicating pipe is communicated with the upper piston cavity, and the lower end of the communicating pipe penetrates through the lower piston cavity to be communicated with the inlet channel.

3. The pneumatic or hydraulic single seat regulating valve according to claim 1, characterized in that: the upper end of the valve rod is connected with a driving device, the driving device is connected to the valve cover through a support, and the driving device is an air cylinder or a hydraulic cylinder.

4. The pneumatic or hydraulic single seat regulating valve according to claim 1, characterized in that: a guide sleeve is arranged between the valve cover and the valve body in a pressing mode, and the valve rod penetrates through the guide sleeve.

Technical Field

The invention relates to an improvement in the field of regulating valves, in particular to an improvement in a pneumatic or hydraulic single-seat regulating valve.

Background

If the traditional regulating valve contains solid particles in a used medium, when the opening of the regulating valve is small (the distance between a valve clack sealing surface and a valve seat sealing surface is close), the solid particles are easy to block at a sealing pair, so that the valve is blocked and the sealing surface is damaged.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a pneumatic or hydraulic single-seat regulating valve for preventing a sealing pair from being blocked and damaged.

In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of pneumatics or single seat governing valve that surges, including valve body, valve gap and valve rod, be equipped with inlet channel and exit channel in the valve body, inlet channel is linked together through central runner with exit channel, and central runner department is equipped with disk seat and the valve clack that forms sealed pair, and the valve clack reciprocates by the valve rod drive, its characterized in that: a first cavity, a second cavity, a third cavity and a fourth cavity are sequentially arranged on the valve body corresponding to the periphery of the central flow passage from inside to outside; the valve seat can be vertically moved and arranged in the first cavity, the upper end of the valve seat can movably extend out of the first cavity, the lower end of the valve seat is provided with a step, the step divides the first cavity into an upper closed piston cavity and a lower closed piston cavity, the upper piston cavity is communicated with the inlet channel, the lower closed piston cavity is communicated with the outlet channel, and a first compression spring is connected between the lower end of the valve seat and the bottom of the first cavity; a scraping sleeve is rotatably arranged in the second cavity, the scraping sleeve is provided with an inner cavity, a push rod capable of moving up and down is arranged in the inner cavity, an upward inclined driving inclined plane is arranged on the right side surface of the push rod, a second compression spring is connected between the upper end of the push rod and the upper end of the inner cavity of the scraping sleeve, the upper end of the inner cavity of the scraping sleeve is communicated with an outlet channel, a right lower through hole is arranged at the lower end of the scraping sleeve, when the valve seat moves down, the right lower through hole is communicated with an upper piston cavity and the inner cavity of the scraping sleeve, a scraping head capable of moving left and right is arranged in the upper part of the scraping sleeve, a reset spring is connected to the scraping head, the right end of the scraping head can extend towards the flow channel direction; a control sleeve and a conversion sleeve are arranged in the third cavity, the control sleeve is fixedly arranged, the conversion sleeve can rotate and is arranged in the control sleeve in a vertically moving mode, a spiral groove is formed in the control sleeve, a pushing head is arranged in the spiral groove and is connected with the conversion sleeve, a clamping block is arranged on the inner side of the conversion sleeve, an extending portion extending into the third cavity is arranged on the left side of the scraping sleeve, a clamping groove is formed in the extending portion, and the clamping groove is matched with the clamping block in an axial sliding and circumferential transmission mode; a switching rod capable of floating up and down is arranged in the fourth cavity, a third compression spring is connected between the upper end of the switching rod and the upper end of the fourth cavity, the upper end of the fourth cavity is communicated with the outlet channel, the lower end of the fourth cavity is communicated with the inlet channel, the valve body is provided with a left upper through hole which penetrates through the outside, the fourth cavity and the top of the spiral groove, and a left lower through hole which penetrates through the outside, the fourth cavity and the bottom of the spiral groove, the switching rod is provided with a first communicating hole, a second communicating hole, a third communicating hole and a fourth communicating hole, when the switching rod moves upwards, the second communicating hole is matched with the upper left through hole to communicate the outside with the top of the spiral groove, the fourth communicating hole is matched with the lower left through hole to communicate the inlet channel with the bottom of the spiral groove, when the switching rod moves downwards, the first communicating hole is matched with the upper left through hole to communicate the outlet channel with the top of the spiral groove, and the third communicating hole is matched with the lower left through hole to communicate the outside with the bottom of the spiral groove.

The lower piston cavity is communicated with the outlet channel through the right through hole, the communicating pipe is arranged on the step at the lower end of the valve seat in a penetrating mode, the upper end of the communicating pipe is communicated with the upper piston cavity, and the lower end of the communicating pipe penetrates through the lower piston cavity to be communicated with the inlet channel.

The upper end of the valve rod is connected with a driving device, the driving device is connected to the valve cover through a support, and the driving device is an air cylinder or a hydraulic cylinder.

A guide sleeve is arranged between the valve cover and the valve body in a pressing mode, and the valve rod penetrates through the guide sleeve.

The improved pneumatic or hydraulic single-seat regulating valve has the advantages that when solid particles are blocked in the sealing pair, the valve seat can be moved downwards, so that the distance between the sealing surface of the valve clack and the sealing surface of the valve seat is temporarily increased, and meanwhile, the solid particles accumulated at the sealing pair are circumferentially scraped by the scraping head to prevent the solid particles from being blocked, so that the improved pneumatic or hydraulic single-seat regulating valve has the advantages of blockage prevention, capability of preventing the sealing pair from being damaged and long service life; meanwhile, the valve can automatically drive the valve clack to move upwards or downwards through a driving device so as to adjust the medium flow or pressure on the outlet side.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of the open state of the present invention.

Fig. 2 is a schematic structural view of the scraping state of the present invention.

FIG. 3 is an enlarged view of the portion A of FIG. 2 according to the present invention.

Detailed Description

The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. The pneumatic or hydraulic single-seat regulating valve comprises a valve body 1, a valve cover 10 and a valve rod 11, wherein an inlet channel 33 and an outlet channel 16 are arranged in the valve body 1, the inlet channel 33 is communicated with the outlet channel 16 through a central channel 22, a valve seat 23 and a valve clack 8 which form a sealing pair are arranged at the position of the central channel 22, the valve clack 8 is driven by the valve rod 11 to move up and down, and a first cavity, a second cavity, a third cavity and a fourth cavity are sequentially arranged on the valve body 1 corresponding to the periphery of the central channel 22 from inside to outside; the valve seat 23 can be vertically moved and arranged in the first cavity, the upper end of the valve seat 23 can movably extend out of the first cavity, the lower end of the valve seat 23 is provided with a step 6, the step 6 divides the first cavity into an upper closed piston cavity 35 and a lower closed piston cavity 34, the upper piston cavity 35 is communicated with the inlet channel 33, the lower piston cavity 34 is communicated with the outlet channel 16 through a right through hole 17, a communicating pipe 24 penetrates through the step 6 at the lower end of the valve seat 23, the upper end of the communicating pipe 24 is communicated with the upper piston cavity 35, the lower end of the communicating pipe 24 penetrates through the lower piston cavity 34 to be communicated with the inlet channel 33, and a first compression spring 21 is connected between the lower; the scraping sleeve 20 is rotatably arranged in the second cavity, the scraping sleeve 20 is provided with an inner cavity, a push rod 27 capable of moving up and down is arranged in the inner cavity, an upward inclined driving inclined plane 7 is arranged on the right side surface of the push rod 27, a second compression spring 28 is connected between the upper end of the push rod 27 and the upper end of the inner cavity of the scraping sleeve 20, the upper end of the inner cavity of the scraping sleeve 20 is communicated with the outlet channel 16, a right lower through hole 25 is arranged at the lower end of the scraping sleeve 20, when the valve seat 23 moves down, the right lower through hole 25 is communicated with an upper piston cavity 35 and the inner cavity of the scraping sleeve 20, a scraping head 26 capable of moving left and right is arranged in the upper part of the scraping sleeve 20, a return spring 36 is connected onto the scraping head 26, the right end of the scraping head 26 can extend towards the flow channel direction and penetrates through the width of the sealing surface of the valve; a control sleeve 18 and a conversion sleeve 19 are arranged in the third cavity, the control sleeve 18 is fixedly arranged, the conversion sleeve 19 is rotatably arranged in the control sleeve 18 in a vertically moving mode, a spiral groove 31 is formed in the control sleeve 18, a push head 30 is arranged in the spiral groove 31, the push head 30 is connected with the conversion sleeve 19, a clamping block 5 is arranged on the inner side of the conversion sleeve 19, an extending portion extending into the third cavity is arranged on the left side of the scraping sleeve 20, a clamping groove 29 is formed in the extending portion, and the clamping groove 29 is matched with the clamping block 5 in an axial sliding mode and a circumferential; a switching rod 32 capable of floating up and down is arranged in the fourth cavity, a third compression spring 4 is connected between the upper end of the switching rod 32 and the upper end of the fourth cavity, the upper end of the fourth cavity is communicated with the outlet channel 16, the lower end of the fourth cavity is communicated with the inlet channel 33, an upper left through hole 3 which penetrates through the outside, the fourth cavity and the top of the spiral groove 31 and a lower left through hole 2 which penetrates through the outside, the fourth cavity and the bottom of the spiral groove 31 are arranged on the valve body 1, a first communicating hole 37, a second communicating hole 38, a third communicating hole 39 and a fourth communicating hole 40 are arranged on the switching rod 32, when the switching rod 32 moves up, the second communicating hole is matched with the upper left through hole 3 to communicate the outside and the top of the spiral groove 31, the fourth communicating hole is matched with the lower left through hole 2 to communicate the inlet channel and the bottom of the spiral groove 31, when the switching rod 32 moves down, the first communicating, the third communicating hole is matched with the left lower through hole 2 to communicate the outside with the bottom of the spiral groove 31.

The upper end of the valve rod 11 is connected with a driving device 15, the driving device 15 is connected to the valve cover 10 through a support 12, and the driving device 15 is an air cylinder or a hydraulic cylinder.

A guide sleeve 9 is arranged between the valve cover 10 and the valve body 1 in a pressing mode, and the valve rod 11 penetrates through the guide sleeve 9.

The working process of the invention is as follows: when the valve clack 8 is driven by the valve rod 11 to move downwards to approach the valve seat 23, when more solid particles are clamped at a sealing pair, the flow area between the valve clack 8 and the valve seat 23 is reduced, the medium pressure at the outlet channel 16 is reduced, the medium pressure of the inlet channel 33 is increased, when the downward acting force of the medium flowing into the upper piston cavity 35 from the inlet channel 33 on the valve seat 23 is larger than the sum of the upward acting force of the medium flowing into the lower piston cavity 34 from the outlet channel 16 and the upward acting force of the first compression spring 21, the valve seat 23 moves downwards, the medium in the upper piston cavity 35 enters the right lower through hole 25 and pushes the push rod 27 to move upwards, and the push rod 27 pushes the scraping head 26 to extend towards the flow channel direction and penetrate through the width of the; meanwhile, the upward acting force of the medium in the inlet channel 33 applied to the switching rod 32 is greater than the sum of the downward acting force of the medium in the third compression spring 4 and the downward acting force of the medium in the outlet channel 16, the inlet channel 33 is communicated with the bottom of the spiral groove 31, the top of the spiral groove 31 is communicated with the atmosphere, the medium in the inlet channel 33 pushes the switching rod 32 to move upwards, so that the medium in the inlet channel 33 enters the bottom of the spiral groove 31 and pushes the pushing head 30 to rotate upwards along the spiral groove 31, and as the pushing head 30 is fixedly connected with the conversion sleeve 19 and a clamping block which extends into the clamping groove 29 is arranged inside the conversion sleeve 19, the pushing head 30 drives the conversion sleeve 19 to rotate upwards when rotating upwards, and simultaneously drives the scraping sleeve 20 to rotate horizontally, namely drives the scraping head 26 to rotate around the sealing surface of the.

After solid particles at the sealing pair are scraped, the flow area between the valve clack 8 and the valve seat 23 is increased, the medium pressure at the outlet channel 16 is recovered to the original pressure value, the push rod 27 moves downwards under the action of the acting force of the second compression spring 28 and the medium pressure in the outlet channel 16, the scraping head 26 is recovered to the original position under the action of the return spring 36, meanwhile, the sum of the upward thrust of the medium in the lower piston cavity 34 on the valve seat 23 and the upward acting force of the first compression spring 21 is larger than the downward acting force of the medium in the upper piston cavity 35 on the valve seat 23, and the valve seat 23 moves upwards to the original position; meanwhile, the sum of the downward acting force of the third compression spring 4 on the switching rod 32 and the downward acting force of the medium in the outlet channel 16 is greater than the upward acting force of the medium in the inlet channel 33 on the switching rod 32, the switching rod 32 moves downwards, the outlet channel 16 is communicated with the top of the spiral groove 31, and the bottom of the spiral groove 31 is communicated with the atmosphere, so that the pushing head 30 rotates downwards along the spiral groove 31 under the pressure action of the medium in the outlet channel 16, and finally the scraping sleeve 20 is driven to horizontally rotate to the original position.

When the valve is ready to be closed, the valve clack 8 moves downwards, the sealing surface of the valve clack 8 presses the sealing surface of the valve seat 23, at the moment, the medium pressure in the outlet channel 16 is reduced, the valve seat 23 moves downwards, meanwhile, the valve clack 8 moves downwards together, and the push rod 27 pushes the scraping head 26 to move rightwards and prop against the excircle of the valve clack 8 due to the fact that the push rod 27 is subjected to an upward acting force which is larger than a downward acting force, and sealing of the valve seat 23 and the valve clack.

In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.