CN112555217A - Rotary hydraulic valve - Google Patents

Abstract

The utility model provides a rotation hydraulic pressure valve, includes hydraulic motor, the power increase of slowing down, the biax is stretched the input shaft, the encoder, valve and connecting piece, can realize the hydraulic control to butterfly valve, ball valve, and gate valve, can automatically regulated hydraulic motor output torque according to the change of valve at the in-process load of opening and close, realize intelligent control mode, prevent to strike the vibrations of valve, environmental suitability is strong, can use and can the safe and reliable operation to the occasion of wide application electric valve and the operational environment homoenergetic that does not adapt to electric valve. The hydraulic motor can be used in inflammable and explosive occasions, humid and highly polluted and highly dusty occasions, the method of driving the hydraulic motor to work by arranging the hydraulic system in different places and conveying hydraulic energy by using the steel pipe is adopted, so that the high risk is effectively avoided, the opening degree of the valve can be accurately controlled, the valve core can be effectively and reliably self-locked, and the application field of the hydraulic motor is wider. The encoder can improve the control precision of the hydraulic valve in the operation process, improve the automation control level, realize necessary conditions of a wireless monitoring function, and meet the requirement of industrial intelligence in the 5G era.

Description

Rotary hydraulic valve

Technical Field

The invention belongs to the field of valves, and particularly relates to a rotary type or multi-rotary type hydraulic valve which is wide in coverage area, high in control precision and low in manufacturing cost.

Background

The valve is used as a key part in water, oil and gas medium pipeline transportation, and is widely applied to various fields of petroleum, natural gas, oil and gas wharfs, chemical engineering, ships, power stations, metallurgy, municipal administration and the like. In recent years, with the increase of the size of engineering projects, the demand of large-diameter or large-size valves is increasing, and manual operation is very difficult and cannot meet the requirements of the times. In order to meet the requirements of an automation system, various valve driving methods have been developed, such as an electric valve driven by an electric motor, an air valve driven by an air cylinder, a hydraulic valve driven by a hydraulic oil cylinder, and the like. The driving mode still has some defects and shortcomings in application practice, the development, application and improvement of the electric valve still has the defects that instant starting torque is small, the valve is not opened reliably, the rotary inertia is large when the motor drives the speed reducer to operate, impact is large on the valve, the electric valve is poor in control precision due to the fact that the motor does not have a self-locking function, and on the other hand, the electric valve is not suitable for being applied to flammable and explosive dangerous occasions such as petroleum and natural gas even though protection is performed due to the fact that the electric valve is driven by electricity. The pneumatic valve has large volume, low air source pressure and small driving force on the valve, and the unstable operation of the valve can be caused by the compressibility of air. The hydraulic valve used at present is a valve driven by an oil cylinder, and the valve plate in the valve is difficult to self-lock due to the floatability of an oil cylinder piston, and the emergency manual operation is not easy to realize. On the other hand, the hydraulic valve is ultra-high in shape and size or ultra-wide and ultra-heavy due to the stroke of the oil cylinder. In addition, several patents which are issued by the inventor of the patent in advance are that a hydraulic motor is used for directly driving a hydraulic valve, and the hydraulic valve is theoretically feasible and has obvious advantages. But the difficulty of manufacturing the special non-standard hydraulic motor is high, the processing cost is high, the manufacturing period is long, and the popularization and the application of the technology are not facilitated. With the arrival of the 5G ten-thousand-object interconnection era, the artificial intelligence industrial automation requires more advanced control level of the valve, so that a valve product which is more reliable, safer and higher in control precision is needed, and a good foundation is laid for realizing wireless remote control.

Disclosure of Invention

The rotary hydraulic valve improves the control precision in the operation process of the valve, and still has reliable self-locking performance, namely improves the universality, can reduce the production cost, shortens the manufacturing period and is convenient to popularize and apply.

The technical scheme adopted by the invention is as follows:

a rotary hydraulic valve comprises a hydraulic motor, a speed reduction booster and an emergency manual operation mechanism;

the speed reduction booster comprises a pair of worm wheels and a worm which are meshed with each other, wherein the worm is a ring surface worm and is of a double-shaft end structure, an output shaft of a hydraulic motor which is transversely arranged is fixedly connected to the shaft end of the transversely arranged worm, and two shaft ends of the worm are supported in a speed reduction booster box body through bearings. The worm wheel is horizontally arranged on the upper shaft end and the lower shaft end of the worm wheel and is supported in the speed reduction booster box body through a bearing. The worm wheel shaft is a hollow shaft, and the valve thread valve rod penetrates through the hollow shaft and is connected with a driving nut embedded in the worm wheel shaft.

The power input part of the valve transmission mechanism is a valve rod driving nut which is vertically arranged and is fixedly connected in the center of a worm wheel shaft. The valve rod transmission mechanism comprises a valve rod driving rod and a driving nut for lifting the valve rod. The upper end of a worm wheel shaft for driving the valve penetrates through the box body and is inserted into an upper rolling bearing embedded in an upper rolling bearing seat, and the upper rolling bearing seat is fixed on the box body.

The valve rod driving rod penetrates through the lower rolling bearing seat and the upper rolling bearing seat and penetrates through the valve driving nut to be in threaded fit with the driving valve rod nut. A position indication scale protective cover is fixed above the upper rolling bearing seat. The side surface of the position indication scale protective cover is provided with a pointer pointing guide opening, and two sides of the position indication scale protective cover are provided with length scales. The upper end surface of the valve rod driving rod is fixed with a valve lifting position pointer, and the corresponding pointer points to the guide port. The locking nut is fixed at the inner upper end of the upper shaft of the worm gear and is positioned by the elastic piston ring. The outer surface of the valve rod driving nut is provided with a key groove corresponding to the inner hole of the hollow worm gear shaft, the key groove and the inner hole of the hollow worm gear shaft are fixedly connected through a flat key, the lower bearing of the worm gear shaft is placed in the bearing seat at the lower part of the box body, the worm gear shaft is arranged in the inner hole of the lower bearing, and the upper bearing is arranged in the upper bearing seat and the upper end cover of the worm gear to adjust the bearing gap flange. And inserting the valve rod driving rod to the driving nut, rotating the box body to enable the driving rod to be screwed into the driving nut to enable the box body to move downwards, and adjusting the gap to fix the driving rod and the box body when the driving rod contacts with a mounting flange of the valve body.

The worm is placed in a worm hole in the side face of the box body and is meshed with the worm wheel, the left bearing is arranged in the bearing seat when the position is proper, the bearing gap adjusting flange is covered on the bearing seat to fix the bearing gap adjusting flange, the right bearing is arranged in the bearing seat, and the right end cover is covered on the bearing seat and fixed. The left side connects and fixes the hydraulic motor, the speed reduction booster box body and the worm shaft by a coupler and a special speed reduction booster connecting body. The right worm shaft end is assembled with a manual emergency operation handle in an inner-to-outer sequence. The outer side of the handle is provided with an encoder bracket, the encoder bracket is provided with an encoder, and an input shaft of the encoder is inserted into the axis of the worm. The mounting holes of the two side plates of the emergency manual operation handle body with the inner U-shaped space are respectively provided with a left bearing seat and a right bearing seat, and a left bearing and a right bearing are respectively arranged in the left bearing seat and the right bearing seat. A left ratchet wheel and a right ratchet wheel (a pair of ratchet wheels) with opposite ratchet directions are fixed on the worm between the left bearing and the right bearing.

The horizontal pawl that sets up and reset spring fixed pin are fixed to be worn to establish on emergent manual operation handle body to the cover is equipped with left pawl and right pawl, overlaps between left pawl and the right pawl and establishes reset spring. One end of a return spring is clamped at the groove of the left pawl handle, the other end of the return spring is clamped at the groove of the right pawl handle, and the return spring is set to be in a spring force mode so that the left pawl and the right pawl are close to each other towards the axis direction of the right extension shaft of the worm. The left pawl is provided with a left pawl pin hole corresponding to the left through hole of the emergency manual operation handle body, and the left pawl pin hole and the left through hole are arranged in such a way that a left pawl clutch bolt is inserted and fixed between the left pawl pin hole and the left through hole when the left pawl is outwards broken to separate the left pawl and enable the left pawl to be separated from the left ratchet wheel. And a right pawl pin hole is formed in the right pawl and corresponds to a right through hole of the emergency manual operation handle body, and the right pawl pin hole and the right through hole are arranged to be used for outwards opening the right pawl so that a right pawl clutch bolt is inserted and fixed between the right pawl pin hole and the right through hole when the right pawl is separated from the right ratchet wheel. And a left pawl elastic sleeve is arranged between the left pawl and the reset spring fixing pin. And a right pawl elastic sleeve is arranged between the right pawl and the reset spring fixing pin.

For the second embodiment: the non-rising stem valve transmission mechanism comprises a vertically arranged valve driving sleeve, and the valve driving sleeve is used as a power input part of the valve transmission mechanism. The upper end of the valve rod of the valve is fixedly connected with the valve driving sleeve by a flat key. The valve driving sleeve is inserted from the lower shaft end of the worm wheel and fixed by a flat key, and a lower rolling bearing is arranged outside the lower shaft diameter of the worm wheel and fixedly supported in the box body through a lower rolling bearing seat. The worm wheel is driven by the worm, an upper rolling bearing is arranged on the outer side of the upper shaft diameter of the worm wheel, the upper rolling bearing is fixedly supported above the gear box body through an upper rolling bearing seat, the gap between the upper rolling bearing and the lower rolling bearing is adjusted through an end cover of the worm wheel and worm box body, and then the end cover is fixed. An encoder is arranged on the upper end face of the end cover of the deceleration booster. The input shaft of the encoder is inserted into a boss at the upper shaft end of the worm gear, the boss penetrates through the end cover of the speed reduction booster, and two sealing parts are arranged at the boss. The right shaft end of the worm is processed into a spline, and the tail part of the worm is reduced in shape and provided with a baffle plate and a split pin.

The working principle and the structural form of the butterfly (shaped) valve and the ball (shaped) valve transmission mechanism are similar to those of the second embodiment, the valve rod of the valve does not need to move up and down and only needs to provide torque required by rotation, the valve rod of the valve needs to be decelerated and the booster provides torque required by rotation, and the valve rod of the butterfly valve and the ball valve needs to be decelerated and the booster provides a rotation angle of 90 degrees. (in practice the structural deceleration augmentor may provide a slew angle of 90 ° or less, or less than 180 °).

The multi-rotary speed-reducing booster and the rotary speed-reducing booster do not change greatly in appearance and working principle, but only change the shape of a worm wheel, a standard worm wheel is processed into a fan-shaped worm wheel with a certain angle according to requirements, the part outside the fan shape is rotated by 90 degrees (or other angles) to completely process and remove the part not participating in the work, a fan-shaped rotation-stopping limiting boss integrated with the box body is arranged and processed at a corresponding proper position in a speed-reducing booster box body, the inner structure of a worm, namely the power input part of a valve transmission mechanism, is unchanged from a hidden rod valve, the center part of a fan-shaped worm wheel shaft is consistent with the shape structure of the hidden rod valve worm wheel shaft, a stud bolt is arranged at the center of the boss on the fan-shaped worm wheel, the shape of the worm wheel shaft is changed from the shape of the hidden rod valve, and the worm, The lower end is screwed into the axle center, the upper end is inserted into the input shaft of the encoder, the middle part is fixed with the valve switch pointer by the nut, the encoder is fixed by the encoder bracket, the bracket is fixed on the end cover of the deceleration booster, and the switch indication mark is fixed below the valve switch pointer on the end cover.

The invention has the advantages that: the hydraulic motor is adopted to drive the speed reduction booster to drive the valve, so that the reliability of the opening process of the valve is improved.

The hydraulic motor is used as a power element, and a special non-standard hydraulic motor for the production of the hydraulic motor is avoided. The speed reducing booster can be selected from various known standard hydraulic motors, so that the manufacturing cost of the rotary and multi-rotary hydraulic valve is reduced, the manufacturing period is shortened, and the specialized serial production is facilitated.

According to the fact that the load change of the valve in the opening and closing process is large, the hydraulic control system can automatically adjust the output torque of the hydraulic motor, the control precision of the hydraulic system is used for controlling the valve, and an ideal intelligent control mode can be achieved. Therefore, the impact and vibration to the valve in the operation process of the driving device are reduced, and the safety and the reliability of the valve operation are improved.

The rotary hydraulic valve has strong adaptability to the environment, can be used in the occasions where the electric valve is widely applied and the working environment which is not suitable for the electric valve, and can reliably operate. The hydraulic motor can be used in inflammable and explosive occasions, humid and highly polluted and high-dust occasions, the application field of the hydraulic motor is wider by arranging a hydraulic system in different places and using a method of conveying hydraulic energy by using a steel pipe to drive the hydraulic motor to work, high-risk risks can be effectively avoided, the hydraulic motor can work safely and reliably, and remote automatic control can be realized.

The rotary type and multi-rotary type hydraulic valves overcome the defects that the starting torque of a motor is small in the operation process of the electric valve, the inertia error generated after driving is large, and the valve driven by a hydraulic oil cylinder cannot be operated by emergency and is self-locked, and can realize effective and reliable self-locking of the valve core.

The encoder is adopted to improve the control precision of the hydraulic valve in the operation process and improve the automation control level, is a necessary condition for realizing the wireless monitoring function, and meets the requirement of industrial intelligence in the 5G era.

The valve rod driving nut transmission mechanism is inserted into the worm wheel shaft and then penetrates into the speed reducing booster, so that the volume, the weight and the height of the rotary type hydraulic valve and the multi-rotary type hydraulic valve are all reduced.

The multi-turn hydraulic valve is provided with the ratchet wheel and pawl mechanism to form a rocker type handle suitable for large-specification valve operation, so that the multi-turn hydraulic valve is convenient and labor-saving to operate and has an emergency manual operation function.

In the present invention, the hydraulic part such as the hydraulic motor, the external hydraulic system and the electric control system are known in the art, and therefore, the description thereof is omitted.

Drawings

Fig. 1 is a cross-sectional view of a multi-turn rising stem hydraulic valve drive section in accordance with an embodiment of the present invention.

Fig. 2 is a partial sectional view of fig. 1.

Fig. 3 is a cross-sectional view of a drive portion of a two-spool multi-rod hydrostatic valve according to an embodiment of the present invention.

Fig. 4 is a partial cross-sectional view of the portion of fig. 3.

Fig. 5 is a sectional view of a drive portion of a two-turn (swing) type hydraulic valve according to an embodiment of the present invention.

Fig. 6 is a sectional view of the structure of fig. 5 in a partial position.

Fig. 7 is a schematic structural diagram of the connection with the rising stem valve according to an embodiment of the present invention.

Fig. 8 is a schematic view of the structure of the second embodiment of the present invention cooperating with a non-rising stem valve.

Fig. 9 is a schematic structural view of the second embodiment of the present invention cooperating with a butterfly valve.

Fig. 10 is a schematic structural view of the second embodiment of the present invention in cooperation with a ball valve.

Fig. 11 is a partial cross-sectional schematic view of the emergency operation device of fig. 1.

Fig. 12 is a cross-sectional view taken along line C-C in fig. 11 (the left pawl is broken off to the right, and the left pawl and the left ratchet wheel are disengaged).

Fig. 13 is a sectional view taken along line D-D in fig. 11 (the right pawl has been broken to the left, and the right pawl and the right ratchet wheel are disengaged).

Fig. 14 is a cross-sectional view E-E of fig. 11.

Fig. 15 is a perspective view of the assembled structure of the return spring, two ratchet wheels and pawls and the return spring fixing pin of fig. 11.

Fig. 16 is a schematic diagram of the hydraulic system and the connections and functional symbols of the present valve.

Detailed Description

Example one

The utility model provides a rotation hydraulic valve, includes valve body 57, hydraulic motor 1, speed reduction booster, valve rod actuating mechanism and emergent manual operation mechanism, valve body 57 and hydraulic motor 1 are known technique, its characterized in that: the speed reduction booster comprises a worm gear box body 2, a transverse worm 3 and a horizontal worm wheel 4, wherein the worm wheel 4 is meshed with the worm 3; the worm gear box 2 is provided with a left end cover 5 and a right end cover 6, worm through holes on the left end cover 5 and the right end cover 6 of the worm gear box 2 are respectively provided with a left worm sealing piece groove 9 and a right worm sealing piece groove 10, a left worm sealing piece 15 is embedded in the left worm sealing piece groove 9, and a right worm sealing piece 16 is embedded in the right worm sealing piece groove 10. A left worm bearing seat 11 is arranged at an opening at the left end of the worm gear box body 2, and a left worm bearing 12 is embedded in the left worm bearing seat 11; a worm right bearing seat 13 is arranged at the opening at the right end of the worm gear box body 2, and a worm right bearing 14 is embedded in the worm right bearing seat 13. The left end of the part of the worm 3, which is positioned in the worm gear box 2, penetrates through a worm left bearing 12 and a worm left sealing element 15 respectively; the right end of the worm penetrates through the worm right bearing 14 and the worm right sealing piece 16; the left ends of the parts of the worms 3 positioned in the worm gear box body 2 are respectively supported by a worm left bearing 12 and sealed by a worm left sealing piece 15, and the left end cover 5 is fixed on the worm gear box body 2 through a plurality of bolts. The right end of the part of the worm, which is positioned in the worm gear box body 2, respectively penetrates through the worm right bearing 14 and the worm right sealing piece 16, and after the positions of the worm gear 4 and the worm 3 are adjusted, the right end cover 6 is fixedly connected with the right end of the worm gear box body 2 through a bolt. The left end of the worm 3 penetrates out of the left end cover 5 and then is connected with an output shaft of the hydraulic motor 1 through a coupler 7; the left end cover 5 of the worm gear box body 2 is fixedly connected with the right end shell of the hydraulic motor 1 through a connecting body 8. An upper rolling bearing 18 is arranged on a worm wheel upper shaft 17 of the worm wheel 4, a lower rolling bearing 19 is arranged on a worm wheel lower shaft 22 of the worm wheel 4, and the upper rolling bearing 18 and the lower rolling bearing 19 are respectively supported by an upper bearing seat and a lower bearing seat which are fixed in the worm wheel box body 2. After the gap between the upper rolling bearing 18 and the lower rolling bearing 19 is adjusted, the upper end cover 20 is fixed on the worm gear box body 2 through the upper end cover 20 through bolts. An annular oil seal 21 is provided at a contact portion between the upper end of the worm wheel upper rolling bearing 18 and the worm wheel upper shaft 17 and at a contact portion between the lower end of the worm wheel lower rolling bearing 19 and the worm wheel lower shaft 22. The upper worm wheel shaft 17 and the lower worm wheel shaft 22 are hollow shafts and are communicated with the central hole of the worm wheel 4.

The valve rod driving mechanism comprises a valve rod driving rod 25, a valve rod driving nut 26 and a hollow limiting nut 27. The hollow limiting nut 27 is arranged at a set position at the upper part of the inner hole of the worm wheel upper shaft 17, is in threaded connection with the inner hole wall of the worm wheel upper shaft 17, and is clamped and positioned by the elastic retainer ring 24.

The valve rod driving nut 26 is arranged in an inner hole of the worm gear upper shaft 17, and the outer wall of the valve rod driving nut 26 is in key connection with the inner hole wall of the worm gear upper shaft 17; the valve rod driving rod 25 penetrates through the lower worm wheel shaft 22, the central hole of the worm wheel 4 and the upper worm wheel shaft 17 and is in threaded connection with a valve rod driving nut 26; the upper end of the valve rod driving rod 25 penetrates through a valve rod driving rod through hole in the upper end cover 20, and a valve lifting position pointer 28 is fixed on the upper end face of the valve rod driving rod 25 and points to the port corresponding to the pointer. The front end of the valve rod driving rod 25 extending out of the worm gear upper end cover 20 is fixedly provided with a position indication scale and a protective cover 30. The lower end of the valve rod driving rod 25 is fixedly connected with a valve core of the valve body.

The emergency manual operating mechanism comprises an operating handle 29, a left ratchet wheel 32, a right ratchet wheel 33, a left rib 34, a right rib 35, a left pawl 36, a right pawl 37 and a return spring 38. The lower parts of the left side plate 45 and the right side plate 39 of the operating handle 29 are respectively provided with a ratchet left bearing seat and a ratchet right bearing seat; the left bearing 51 is embedded into the ratchet left bearing seat, and the right bearing 59 is embedded into the ratchet right bearing seat; the right end of the worm 3 penetrates through the right end cover 6 of the worm gear box body 2, two ends of an operating handle on the worm 3 are respectively supported by a left bearing 51 and a right bearing 59, the right end of the worm 3 is provided with an encoder 61, and the encoder 61 is supported by the encoder bracket 31 and fixed on the worm gear box body 2; the left ratchet wheel 32 and the right ratchet wheel 33 are arranged on the worm 3; the left ratchet wheel 32 and the right ratchet wheel 33 are positioned between the left bearing 51 and the right bearing 59 and connected with the left ratchet wheel 32 and the right ratchet wheel 33 through a plurality of flat keys 58, a left retaining edge 34 is fixedly arranged on the left outer side of the left bearing 51, and a right retaining edge 34 is fixedly arranged on the right outer side of the right bearing 59. The left pawl 36 and the right pawl 37 are fixed to pawl fixing pins 40, respectively. The left elastic sleeve 23 is arranged in the lining of the pawl fixing shaft hole of the left pawl 36, and the right elastic sleeve 41 is arranged in the lining of the pawl fixing shaft hole of the right pawl 37. A left pawl handle 42 is fixed to the left pawl 36 and a right pawl handle 60 is fixed to the right pawl 37. A return spring 38 is fitted over the pawl securing pin 40, with one end of the return spring 38 secured within a recess 46 in the left pawl handle 42 and the other end of the return spring 38 secured within a recess 48 in the right pawl handle 60. A middle stopper 47 is provided between the left pawl 36 and the right pawl 37 in the pawl fixing pin 40, an operating lever sheath 44 is provided on the operating lever at the upper end of the operating handle 29, and the operating lever sheath 44 is fixed to the operating lever by a fixing pin 43. During emergency manual operation, the operating rod is pushed, the pawl fixing shaft and the worm rotate, the left pawl 36 and the right pawl 37 are respectively pressed against corresponding ratchets on the left ratchet wheel 32 and the right ratchet wheel 33, and the emergency manual operation of the valve is realized. The right pawl 37 is provided with a right pawl clutch pin hole corresponding to the right through hole of the operating handle 29. A right pawl clutch plug pin 62 is inserted between the right pawl clutch pin holes for positioning. And a left pawl pin hole is formed in the left pawl 36 and corresponds to a left through hole of the operating handle, and a left pawl clutch bolt is inserted between the left pawl pin hole and the left through hole for fixation.

Another way of the emergency manual operation mechanism is to use an emergency hand wheel 50, and the emergency hand wheel 50 is connected with the front end of the worm through a split pin 63 and a baffle 49.

Example two

The valve rod driving mechanism is a driving valve rod 25 required by a multi-rotation hidden rod valve, the outer surface of the upper portion of the driving valve rod 25 is smooth and does not have a T-shaped threaded structure, the driving valve rod 25 can only rotate, the valve rod cannot move up and down, a valve rod driving piece 26 in the valve rod driving mechanism is required to be arranged into a hollow tube, the hollow tube is inserted into a worm wheel lower shaft 22, the outer wall of the hollow tube is in key connection with an inner hole of the worm wheel lower shaft 22, and the inner wall of the hollow tube is in key. The upper end of the upper worm wheel shaft 17 is provided with a boss 56, the boss 56 is inserted into a central through hole of an upper end cover 52 of the worm wheel and worm box body, a sealing element 53 is arranged between the upper part of the boss 56 and the end cover 52 of the worm wheel and worm box body, an encoder 61 is fixedly arranged on the end cover 52, the input shaft end of the encoder 61 is inserted into the boss 56 at the upper end of the upper worm wheel shaft 17 and is connected with the same in key, and other parts of the principle and the structure are the same as those of the multi-rotation type open-lever hydraulic.

On the basis of the multi-rotation type blind rod hydraulic valve, the inner walls of two parts, namely a worm wheel and worm box body 2, in the speed reduction booster are changed to form the speed reduction booster suitable for the working characteristics of the rotation type hydraulic valve by combining the working characteristics of the driving modes, such as a rotation type butterfly valve, a rotation type ball valve and the like. Namely, the standard worm wheel 4 is processed into a fan-shaped worm wheel with a certain rotation angle as required, and the worm wheel part which does not participate in the work is removed. (the size of the angle of the sector worm wheel is related to the size of the angle required by the worm wheel shaft to drive the rotary valve rod to open and close). secondly, a sector rotation stopping limiting boss integrated with the box body is arranged and processed on the box body 2 at the inner side of the speed reduction booster, namely the worm wheel and worm box body 2 close to one side in the radial direction of the worm wheel, when the sector worm wheel drives the rotary valve rod to rotate in place, the side face of the sector worm wheel contacts the end face of the sector rotation stopping limiting boss, and then the sector worm wheel is forced to stop at the rotation angle required by the rotary hydraulic valve, so that the rotary hydraulic. When the angle of the fan-shaped worm wheel is changed and the position and the angle of the fan-shaped rotation stopping limit boss on the inner wall of the box body are changed, the speed reduction booster can realize the torque function required by the rotation angle of less than or equal to 90 degrees or less than 180 degrees.

And elastic buffer parts are respectively arranged on the side surface of the fan-shaped worm wheel and the end surface of the fan-shaped rotation stopping limiting boss on the inner wall of the box body. The upper end of the shaft 17 on the (sector) worm wheel 4 is provided with a boss 56, a bolt is screwed into a central screw hole at the front end of the boss, a switch valve indicating needle 55 is clamped by a nut, a valve rod switch indicating mark 54 is arranged and fixed on the position of the end cover 52 of the worm wheel and worm box body corresponding to the indicating needle 55, the central hole at the upper end of the bolt for fixing the switch valve indicating needle 55 is inserted into an input shaft key of an encoder 61 for connection, the encoder 61 is supported and fixed by an encoder bracket 35, and the encoder bracket 35 is fixed on the end cover 52 of the worm wheel.

The structure of the invention is applicable to a multi-turn (lifting) type hydraulic switch valve (see attached figures 2 and 4) and a turn (rotating) type hydraulic switch valve (see attached figure 6).

Claims (6)

1. The utility model provides a rotation hydraulic pressure valve, includes valve body (57), hydraulic motor (1), speed reduction booster, valve rod drive structure and urgent manual operation mechanism, valve body and hydraulic motor (1) are known technique, its characterized in that: including valve body, hydraulic motor (1), speed reduction booster, valve rod actuating mechanism and emergent manual operation mechanism, valve body and hydraulic motor (1) are known technique, its characterized in that: a worm left sealing piece groove (9) and a worm right sealing piece groove (10) are respectively arranged at the worm through holes on a left end cover (5) and a right end cover (6) of the worm gear and worm box body (2), a worm left sealing piece (15) is embedded in the worm left sealing piece groove (9), and a worm right sealing piece (16) is embedded in the worm right sealing piece groove (10); a worm left bearing seat (11) is arranged at the opening at the left end of the worm gear box body (2), and a worm left bearing (12) is embedded in the worm left bearing seat (11); a worm right bearing seat (13) is arranged at the opening at the right end of the worm gear box body (2), and a worm right bearing (14) is embedded in the worm right bearing seat (13); the left end of the part of the worm (3) positioned in the worm gear box body (2) respectively penetrates through a worm left bearing (12) and a worm left sealing piece (15); the right end of the worm penetrates through a worm right bearing (14) and a worm right sealing piece (16); the left end of the part of the worm (3) positioned in the worm gear box body (2) is respectively supported by a worm left bearing (12) and sealed by a worm left sealing element (15), and a left end cover (5) is fixedly connected with the worm gear box body (2) through a plurality of bolts; the right end of the part of the worm, which is positioned in the worm gear box body (2), penetrates through a worm right bearing (14) and a worm right sealing piece (16) respectively, is supported by the worm right bearing (14), is sealed by the worm right sealing piece (16), and after the positions of the worm gear (4) and the worm (3) are adjusted, a right end cover (6) is fixedly connected with the right end of the worm gear box body (2) through a bolt; the left end of the worm (3) penetrates out of the left end cover (5) and then is connected with an output shaft of the hydraulic motor (1) through a coupler (7); the left end cover (5) of the worm gear box body (2) is fixedly connected with the right end shell of the hydraulic motor (1) through a connecting body (8); an upper rolling bearing (18) is arranged on a worm wheel upper shaft (17) of the worm wheel (4), a lower rolling bearing (19) is arranged on a worm wheel lower shaft (22) of the worm wheel (4), and the upper rolling bearing (18) and the lower rolling bearing (19) are respectively supported by an upper bearing seat and a lower bearing seat which are fixed in the worm wheel box body (2); after the gap between the upper rolling bearing (18) and the lower rolling bearing (19) is adjusted, the upper end cover (20) is fixed on the worm gear box body (2) through a bolt through the upper end cover (20); an oil seal (21) is arranged at the contact part of the upper end of the worm wheel upper rolling bearing (18) and the worm wheel upper shaft (17), and the worm wheel upper shaft (17) and the worm wheel lower shaft (22) are hollow shafts and are communicated with a central hole of the worm wheel (4); the valve rod driving mechanism comprises a valve rod driving rod (25), a valve rod driving nut (26) and a hollow limiting nut (27), wherein the hollow limiting nut (27) is arranged at the upper part of an inner hole of the worm wheel upper shaft (17) and is in threaded connection with the inner hole wall of the worm wheel upper shaft (17) and is clamped and positioned by an elastic check ring (24).

2. The rotary hydraulic valve as claimed in claim 1, wherein the valve is a butterfly valve or a ball valve, the worm wheel (4) is a sector worm wheel, a standard worm wheel is processed into a sector worm wheel with a certain angle according to the requirement, a sector rotation-stopping limit boss integrated with the box is arranged in the worm wheel and worm box body (2), and elastic buffer parts are arranged on the end face of the limit boss and the side face of the sector worm wheel; the driving valve rod (25) is smooth in the outer surface of the upper portion of the driving valve rod and does not have a T-shaped threaded structure, the driving valve rod (25) can only rotate, the valve rod driving piece (26) is a hollow tube, the hollow tube is inserted into the worm gear lower shaft (22), the outer wall of the hollow tube is in key connection with an inner hole of the worm gear lower shaft (22), and the inner wall of the hollow tube is in key connection with the upper end portion of the driving rod (25); the multi-turn type open-lever hydraulic valve is characterized in that a boss (56) is arranged at the upper end of the worm wheel upper shaft (17), the boss (56) is inserted into a central through hole of an upper end cover (52) of the worm wheel and worm box body, a sealing element (53) is arranged between the upper part of the boss (56) and the end cover (52) of the worm wheel and worm box body, an encoder (61) is fixedly arranged on the end cover (52), the input shaft end of the encoder (61) is inserted into the boss (56) at the upper end of the worm wheel upper shaft (17) to be connected through a key, and other parts of the multi-turn type open.

3. Rotary hydraulic valve according to claim 1, characterized by the worm (3) being a torus worm, being a double-axis end structure.

4. Rotary hydraulic valve according to claim 1, characterized by the emergency manual operation mechanism comprising an operation handle (29), a ratchet shaft (3), a left ratchet (32), a right ratchet (33), a left rib (34), a right rib (35), a left pawl (36), a right pawl (37) and a return spring (38); the operating handle (29) is provided with a left side plate and a right side plate, the left side plate is provided with a ratchet wheel left bearing seat, and the right side plate is provided with a ratchet wheel right bearing seat; a left bearing (51) is embedded into the ratchet wheel left bearing seat, and a right bearing (59) is embedded into the ratchet wheel right bearing seat; two ends of the worm (3) are respectively supported by a left bearing (51) and a right bearing (59); a left ratchet wheel (32) and a right ratchet wheel (33) are arranged on the worm (3); the left ratchet wheel (32) and the right ratchet wheel (33) are positioned between the left bearing (51) and the right bearing (59); the left ratchet wheel (32) and the right ratchet wheel (33) are connected with the worm (3) through a plurality of flat keys (58); the left pawl (36) and the right pawl (37) are respectively fixed on the pawl fixing pin (40); a left elastic sleeve (23) is arranged in the lining of the pawl fixing shaft hole of the left pawl (36), and a right elastic sleeve (41) is arranged in the lining of the pawl fixing shaft hole of the right pawl (37); a left pawl handle (42) is fixed on the left pawl (36), and a right pawl handle (60) is fixed on the right pawl (37); a return spring (38) is sleeved on the pawl fixing pin (40), one end of the return spring (38) is fixed in a groove (46) of the left pawl handle (42), and the other end of the return spring (38) is fixed on a groove (48) of the right pawl handle (60); a middle stop block (47) is arranged between the left pawl (36) and the right pawl (37) on the pawl fixing pin (40), an operating rod protective sleeve (44) is sleeved on an operating rod at the upper end of the operating handle (29), and the operating rod protective sleeve (44) is fixed on the operating rod through a fixing pin (43).

5. The rotary hydraulic valve as claimed in claim 1 or 2, wherein the emergency manual operating mechanism is an emergency hand wheel (50) fixed to the end of the worm extending out of the right end cap of the worm gear box.

6. The rotary hydraulic valve according to claim 1, wherein the valve rod driving member (26) is a hollow tube, the hollow tube is inserted into the lower worm wheel shaft (22), the outer wall of the hollow tube is in key connection with the inner hole wall of the lower worm wheel shaft (22), the inner wall of the hollow tube is in key connection with the upper end part of the valve driving rod (25) in a matching way, the upper end of the upper worm wheel shaft (17) is provided with a boss (56), and the boss (56) is inserted into a central through hole of an upper end cover (52) of the worm wheel and worm box body; be provided with sealing member (53) between boss (56) upper portion and end cover (52) of worm gear box, the front end of boss is provided with valve rod switch pilot mark (54) and switch valve pointer (55), and switch valve pointer (55) correspond interface connection with encoder (61), and encoder (61) are supported by encoder support (35), and encoder support (35) are fixed on the end cover of worm gear box.

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