CN201723519U

CN201723519U - Manual pilot valve

Info

Publication number: CN201723519U
Application number: CN2010202173680U
Authority: CN
Inventors: 应永华
Original assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Current assignee: Ningbo Long Wall Fluid Kinetic Sci Tech Co Ltd
Priority date: 2010-06-07
Filing date: 2010-06-07
Publication date: 2011-01-26
Anticipated expiration: 2020-06-07

Abstract

A manual pilot valve comprises a valve body and a handle assembly. The handle assembly is rotatably connected with a transverse jack at the upper side of the valve body. A valve chamber of the valve body is internally provided with the following components successively from top to bottom: an upper plug, a gland, an adjusting screw, a spring seat, a spring, an adjusting screw cap push rod, a control valve seat, an upper ball, a valve seat, a lower ball, a guide sleeve, a return spring and a lower plug. A vertical shaft hole of the valve seat is internally provided with a rod which can slide vertically along a vertical shaft hole. The rod pushes between the upper ball and the lower ball. The guide sleeve is slidably connected with a groove at the upper part of the lower plug. The return spring pushes between the guide sleeve and the lower plug. The gland, the spring seat and the adjusting screw cap are slidably connected with the valve chamber. The gland is connected with the spring seat. The spring pushes between the spring base and the adjusting screw cap. An upper part of a screw of adjusting screw is slidably connected with the spring base, and the lower part is connected with the adjusting screw cap. The bottom of the adjusting screw is connected with the top of the push rod. The manual pilot valve has the following advantages: no easy damage and long service life.

Description

Manual pilot valve

Technical field

The utility model relates to a kind of valve, particularly a kind of manual pilot valve.

Background technique

In fully mechanized coal mining face, pilot valve is one of critical elements in the hydraulic support control system, it constitutes the type pilot selector valve with main control valve usually, its objective is the main control valve of controlling high pressure, big flow by the pilot valve that adopts small flow, to reduce operating torque.At present, State Intellectual Property Office discloses notice of authorization number on the net and has been " CN 2864185Y ", name is called the utility model patent of " manually pilot control valve ", this utility model patent discloses a kind of manual pilot valve, it comprises valve body and handle, one side of valve body is provided with axial jack, in jack, be fixed with screw plug successively, spring, ball seat, first ball, first valve pad, valve seat, second valve pad, second ball, guide pin bushing and push rod, valve seat is provided with axial hole, axially be placed with position-limited lever in the inner via hole, this position-limited lever through hole vertically horizontally slips, push rod is located at second ball and can be fixed in rotationally between the handle of the valve body the other end, is provided with circular groove in an end end of close second ball of this push rod, and second ball is embedded in the circular groove, guide pin bushing is located at the push rod periphery, and spring is located between screw plug and the ball seat.Also there is a deficiency in the manual pilot valve of said structure in actual application: because push rod directly is connected with handle, therefore, when handle is upwards pushed away, handle can rotate and oppress push rod makes it promote second ball, make second ball be pressed on second valve pad, handle is rotated when excessive, push rod, second ball and second valve pad very easily produce deformation or damage and cause manual pilot valve to lose efficacy, thereby greatly reduce the working life of manual pilot valve under the situation of excessive pressurized.

The model utility content

The technical problems to be solved in the utility model is, provide a kind of be difficult for impaired, the manual pilot valve of long service life.

For solving the problems of the technologies described above, the utility model provides a kind of manual pilot valve of following structure: it comprises valve body and Handleset, Handleset is rotatably connected in the horizontal jack of valve body upside, be connected with upper plug head in the valve pocket of valve body from top to bottom in turn, push rod, control valve seat, last ball, valve seat, following ball, guide pin bushing, Returnning spring and lower end cap, push rod and last ball all are connected in the vertical through hole of control valve seat slidably, be provided with the shuttle bar that can slide up and down along vertical axis hole in the vertical axis hole of valve seat, the shuttle masthead is between last ball and following ball, guide pin bushing is connected in the groove on lower end cap top slidably, Returnning spring withstands between guide pin bushing and the lower end cap, wherein, also comprise gland, adjusting screw, spring seat, spring and adjusting nut, gland, spring seat and regulate nut and be connected slidably successively from top to bottom in the valve pocket between Handleset and the control valve seat, gland is connected with spring seat, spring withstands on spring seat and regulates between the nut, the screw rod top of adjusting screw slidably is connected with spring seat, the screw rod bottom of adjusting screw is connected with the adjusting nut, and the bottom of adjusting screw is connected with the top of push rod.

Manual pilot valve described in the utility model, wherein, Handleset comprises handgrip and handle body, the handle body is rotatably connected in the horizontal jack of valve body upside, handle body one end be connected with Cock screw, be connected with nut on the Cock screw, the other end and the handgrip of handle body are rotatably connected, the upper side wall of handgrip is the plane, the left side wall of handgrip is an arc shaped surface, the left side wall of handgrip and the right side wall of valve body are close to, the rotary middle point of handgrip to the distance of upper side wall greater than the rotary middle point of handgrip distance to the valve body right side wall.

After adopting said structure, the manual pilot valve of the utility model has the following advantages: when Handleset is upwards pushed away, Handleset can rotate and oppress gland makes it promote spring seat to lower slider, the downward sliding compression spring of spring seat, regulate nut and under the effect of spring force, drive adjusting screw to lower slider, adjusting screw promotes connected push rod to lower slider, when the adjusting nut slides into to a certain degree downwards, in other words, promptly when the top of the bottom of regulating nut and control valve seat is close to, regulating nut stops to lower slider under the support of control valve seat, therefore make the adjusting screw that is connected with the adjusting nut also stop to lower slider, thereby make push rod also stop to lower slider, if the elastic force of spring still imposes on the pressure of gland less than Handleset at this moment, gland can continue to promote spring seat to lower slider, elastic force until spring equates with the pressure that Handleset imposes on gland, and in this course, regulate nut, adjusting screw and push rod all will remain static, and not the gland applied pressure is influenced by Handleset, thereby avoided the excessive pressurized of transmission paries such as push rod and the situation generation of deformation or damage, guarantee the safe handling of the manual pilot valve of the utility model, prolonged the working life of the manual pilot valve of the utility model greatly.

Description of drawings

Fig. 1 is the sectional structure schematic representation of the manual pilot valve of the utility model.

Embodiment

Below in conjunction with the drawings and specific embodiments the manual pilot valve of the utility model is described in further detail.

As shown in Figure 1, in this embodiment, the manual pilot valve of the utility model comprises valve body 1 and Handleset, be connected with upper plug head 2 from top to bottom in turn in the valve pocket 28 of valve body 1, gland 20, spring seat 22, spring 23, adjusting screw 21, regulate nut 24, push rod 3, control valve seat 4, last ball 5, valve seat 6, following ball 7, guide pin bushing 8, Returnning spring 9 and lower end cap 10, Handleset comprises handgrip 16, handle body 17, Cock screw 18 and nut 19, handle body 17 is rotatably connected in the horizontal jack of valve body 1 upside by straight pin, Cock screw 18 is connected with an end of handle body 17, nut 19 is connected with Cock screw 18, and the upper-end surface of the lower end surface of nut 19 and handle body 17 is close to, the effect of nut 19 is to prevent effectively that becoming flexible from appearring in Cock screw 18, the other end of handle body 17 is rotatably connected by straight pin and handgrip 16, the left side wall of handgrip 16 is an arc shaped surface, the right side wall of the left side wall of handgrip 16 and valve body 1 is close to, the upper side wall of handgrip 16 is the plane, the rotary middle point of handgrip 16 to the distance of upper side wall greater than the rotary middle point of handgrip 16 distance to valve body 1 right side wall, gland 20, spring seat 22 and adjusting nut 24 all slidably are connected with valve pocket 28, gland 20 is connected with spring seat 22, spring 23 withstands on spring seat 22 and regulates between the nut 24, the screw rod top of adjusting screw 21 slidably is connected with spring seat 22, the screw rod bottom of adjusting screw 21 is threaded with adjusting nut 24, push rod 3 and last ball 5 all are connected in the vertical through hole of control valve seat 4 slidably, the bottom surface of push rod 3 upper-end surfaces and adjusting screw 21 is close to, valve seat 6 is provided with oil return through-hole 12 and oil-feed through hole 13, oil return through-hole 12 is communicated with return opening 11 and control hydraulic fluid port 29, oil-feed through hole 13 is together with control hydraulic fluid port 29 and filler opening 15, be provided with the shuttle bar 14 that can slide up and down along vertical axis hole in the vertical axis hole of valve seat 6, shuttle bar 14 withstands between ball 5 and the following ball 7, guide pin bushing 8 is connected in the groove on lower end cap 10 tops slidably, Returnning spring 9 withstands between guide pin bushing 8 and the lower end cap 10, control valve seat 4 is provided with upper oil hole 25, the vertical through hole that upper oil hole 25 is communicated with on filler opening 15 and the control valve seat 4, lower end cap 10 is provided with the following oilhole 27 that is communicated with filler opening 15 and lower end cap 10 upper grooves, in the vertical through hole of control valve seat 4, also be provided with back-up ring 26, back-up ring 26 is enclosed within on push rod 3 periphery walls slidably, wherein, the left side wall of handgrip 16 be arc shaped surface can make handgrip 16 push to and put down in the process laborsaving, the upper side wall of handgrip 16 is that the effect on plane is when the upper side wall of handgrip 16 during towards the right side wall of valve body 1, the whole upper side wall of handgrip 16 can be close to the right side wall of valve body 1, thereby make handgrip 16 can be in a higher self-locking state of stability, shock resistance is strong, and the rotary middle point of handgrip 16 is to make handgrip 16 be brought to and put down in process can drive handle body 17 it is rotated greater than the rotary middle point of handgrip 16 to the purpose of the distance of valve body 1 right side wall to the distance of upper side wall, the effect of upper oil hole 25 and following oilhole 27 is that high-voltage oil liquid is incorporated into respectively in the vertical through hole and lower end cap 10 upper grooves on the control valve seat 4, utilize the high pressure of high-voltage oil liquid that push rod 3 and guide pin bushing 8 are exerted pressure, thereby guarantee push rod 3, last ball 5, shuttle bar 14, following ball 7 and guide pin bushing 8 are in the interlock state all the time, the effect of back-up ring 26 is to make two 0 RunddichtringOs in the vertical through hole of being located at control valve seat 4 equally slide up and down the both sides up and down that are in upper oil hole 25 in the process all the time respectively at push rod 3, thereby guarantees the sealing of control valve seat 4 and push rod 3 joints.

The working principle of the manual pilot valve of the utility model is: handgrip 16 is upwards pushed away, make the right side wall of its upper side wall and valve body 1 be close to the formation self-locking, the active force that handle body 17 is subjected to handgrip 16 rotates counterclockwise, making Cock screw 18 move down compressing gland 20 makes it promote spring seat 22 to lower slider, spring seat 22 downward sliding compression springs 23, regulate nut 24 and under the effect of spring 23 elastic force, drive adjusting screw 21 to lower slider, adjusting screw 21 promotes connected push rod 3 to lower slider, push rod 3 promotes to go up ball 5 to lower slider, make ball 5 be close to the opening blocking-up return opening 11 at valve seat 6 tops and the oil circuit between the control hydraulic fluid port 29, last ball 5 is oppressed shuttle bar 14 simultaneously moves down the following ball 7 of its promotion, make down the lift off a seat opening of 6 bottoms of ball 7 be communicated with oil circuit between filler opening 15 and the control hydraulic fluid port 29, the main control valve Control work machinery action that is connected with the manual pilot valve of the utility model at this moment; Handgrip 16 is put down, the right side wall of its left side wall and valve body 1 is close to, in other words, be that handgrip 16 restPoses, handle body 17 also restPoses, Cock screw 18 moves up and leaves gland 20, at this moment, under the elastic force effect of Returnning spring 9, guide pin bushing 8 promotes down, and ball 7 moves up, make down ball 7 be close to the opening blocking-up filler opening 15 of valve seat 6 bottoms and the oil circuit between the control hydraulic fluid port 29, following ball 7 is oppressed shuttle bar 14 simultaneously makes it promote to go up upwards slip of ball 5, make the lift off a seat opening at 6 tops of ball 5 be communicated with oil circuit between return opening 11 and the control hydraulic fluid port 29, the main control valve Control work machinery that be connected with the manual pilot valve of the utility model this moment stops to move.

Claims

1. manual pilot valve, comprise valve body (1) and Handleset, described Handleset is rotatably connected in the horizontal jack of valve body (1) upside, be connected with upper plug head (2) from top to bottom in turn in the valve pocket (28) of described valve body (1), push rod (3), control valve seat (4), last ball (5), valve seat (6), following ball (7), guide pin bushing (8), Returnning spring (9) and lower end cap (10), described push rod (3) and last ball (5) all are connected in the vertical through hole of control valve seat (4) slidably, be provided with the shuttle bar (14) that can slide up and down along vertical axis hole in the vertical axis hole of described valve seat (6), described shuttle bar (14) withstands between ball (5) and the following ball (7), described guide pin bushing (8) is connected in the groove on lower end cap (10) top slidably, described Returnning spring (9) withstands between guide pin bushing (8) and the lower end cap (10), it is characterized in that: also comprise gland (20), adjusting screw (21), spring seat (22), spring (23) and adjusting nut (24), described gland (20), spring seat (22) and regulate nut (24) and be connected slidably successively from top to bottom in the valve pocket (28) between Handleset and the control valve seat (4), described gland (20) is connected with spring seat (22), described spring (23) withstands on spring seat (22) and regulates between the nut (24), the screw rod top of described adjusting screw (21) slidably is connected with spring seat (22), the screw rod bottom of described adjusting screw (21) is connected with adjusting nut (24), and the bottom of described adjusting screw (21) is connected with the top of push rod (3).

2. manual pilot valve according to claim 1, it is characterized in that: described Handleset comprises handgrip (16) and handle body (17), described handle body (17) is rotatably connected in the horizontal jack of valve body (1) upside, described handle body (17) one ends are connected with Cock screw (18), be connected with nut (19) on the described Cock screw (18), the other end of described handle body (17) and handgrip (16) are rotatably connected, the upper side wall of described handgrip (16) is the plane, the left side wall of described handgrip (16) is an arc shaped surface, the right side wall of the left side wall of described handgrip (16) and valve body (1) is close to, the rotary middle point of described handgrip (16) to the distance of upper side wall greater than the rotary middle point of handgrip (16) distance to valve body (1) right side wall.