阅读说明：本技术 一种用于阀杆与操纵机构连接的防松止动装置 (Anti-loosening stop device for connecting valve rod with operating mechanism ) 是由 徐熙 潘伟龙 严巍峰 何静 方小峰 李小辉 崔添棋 窦建业 于 2020-12-25 设计创作，主要内容包括：本发明公开一种用于阀杆与操纵机构连接的防松止动装置,包括：阀杆、横销、球头、下夹板、调整垫、上夹板、锁块、榫块、卡槽和销孔；下夹板、调整垫和上夹板固定连接并形成容纳球头的空腔,下夹板套设于阀杆上,球头与阀杆连接,阀杆的上部设有横向贯通的横销孔,球头的内部中心位置设有横向贯通的销孔,销孔与横销孔相配合并对准；横销设于销孔和横销孔的内部；球头的上端中心位置设有与连接孔贯通的卡槽,锁块设于卡槽内；锁块的中心位置设有竖向贯通的第一榫槽；榫块的上部设于锁块的第一榫槽内,榫块的下部与阀杆的顶部连接。本发明装置能够有效消除传统结构防松止动可靠性差,维修经济性差,横销易磨损、断裂等缺点。(The invention discloses a locking and stopping device for connecting a valve rod with an operating mechanism, which comprises: the device comprises a valve rod, a transverse pin, a ball head, a lower clamping plate, an adjusting pad, an upper clamping plate, a locking block, a tenon block, a clamping groove and a pin hole; the lower clamping plate, the adjusting pad and the upper clamping plate are fixedly connected to form a cavity for containing the ball head, the lower clamping plate is sleeved on the valve rod, the ball head is connected with the valve rod, a transverse pin hole which is transversely communicated is formed in the upper portion of the valve rod, a pin hole which is transversely communicated is formed in the center of the interior of the ball head, and the pin hole is matched with and aligned to the transverse pin hole; the transverse pin is arranged in the pin hole and the transverse pin hole; a clamping groove communicated with the connecting hole is formed in the center of the upper end of the ball head, and the locking block is arranged in the clamping groove; a first vertically through mortise is arranged at the center of the locking block; the upper portion of tenon piece is located the first tongue-and-groove of locking piece, and the lower part of tenon piece is connected with the top of valve rod. The device can effectively overcome the defects of poor locking reliability, poor maintenance economy, easy abrasion and breakage of the transverse pin and the like of the traditional structure.)

1. An anti-loosening stop device for connecting a valve stem to an operating mechanism, the device comprising: the ball head adjusting device comprises a valve rod (1), a transverse pin (2), a ball head (3), a lower clamping plate (4), an adjusting pad (5), an upper clamping plate (6), a locking block (7), a tenon block (8), a clamping groove (9) and a pin hole (10);

the upper clamping plate (6) is positioned right above the lower clamping plate (4), and the adjusting pad (5) is positioned between the lower clamping plate (4) and the upper clamping plate (6); the lower splint (4), the adjusting pad (5) and the upper splint (6) are fixedly connected to form a cavity; the lower clamping plate (4) is sleeved at the lower part of the valve rod (1); the ball head (3) is arranged in a cavity formed by the lower clamping plate (4), the adjusting pad (5) and the upper clamping plate (6);

a vertically through connecting hole is formed in the center of the inner part of the ball head (3), and the ball head (3) is fixedly connected with the upper part of the valve rod (1) through the connecting hole; the upper part of the valve rod (1) is provided with a transverse pin hole which is transversely communicated, the center position of the inner part of the ball head (3) is provided with a transverse pin hole (10) which is transversely communicated, and the pin hole (10) of the ball head (3) is matched and aligned with the transverse pin hole of the valve rod (1); the transverse pin (2) is arranged in the aligned pin hole (10) and the transverse pin hole;

a clamping groove (9) communicated with the connecting hole is formed in the center of the upper end of the ball head (3), and the locking block (7) is arranged in the clamping groove (9); a first vertically through mortise is arranged at the center of the locking block (7); the upper portion of tenon piece (8) is located the first tongue-and-groove of locking piece (7), and the lower part of tenon piece (8) is connected with the top of valve rod (1).

2. The locking and stopping device for the connection of the valve rod and the operating mechanism is characterized in that a first hemispherical hole is formed in the middle of the upper surface of the lower clamping plate (4), a second hemispherical hole is formed in the middle of the lower surface of the upper clamping plate (6), a through round hole is formed in the middle of the adjusting pad (5), and the first hemispherical hole, the round hole and the second hemispherical hole correspondingly penetrate through and form a cavity for accommodating the ball head (3).

3. The anti-loosening and stopping device for connecting the valve rod with the operating mechanism is characterized in that first bolt holes are uniformly formed in the lower clamping plate (4) around the circumference of a first hemispherical hole, second bolt holes which are vertically communicated are uniformly formed in the upper clamping plate (6) around the circumference of a second hemispherical hole, third bolt holes are uniformly formed in the adjusting pad (5) around the circumference of a round hole, and the first bolt holes, the second bolt holes and the third bolt holes are correspondingly communicated; the connecting bolts are arranged in the first bolt hole, the second bolt hole and the third bolt hole, and the lower clamping plate (4), the adjusting pad (5) and the upper clamping plate (6) are fixedly connected through the connecting bolts.

4. The anti-loose stop device for connecting the valve rod with the operating mechanism is characterized in that a through hole which is vertically communicated is formed in the middle of the lower surface of the lower clamping plate (4), the through hole is communicated with the first hemispherical hole, and the lower clamping plate (4) is sleeved on the lower portion of the valve rod (1) through the through hole.

5. Anti-loose stop device for the connection of a valve stem to an operating mechanism, according to claim 1, characterized in that the pin hole (10) is of an elongated configuration, the length of the pin hole (10) being greater than the diameter of the cross pin (2).

6. The locking and stopping device for connecting the valve rod and the operating mechanism is characterized in that a second mortise is arranged at the top center position of the valve rod (1), and the lower part of the tenon block (8) is detachably connected with the second mortise.

7. Anti-loose stop device for connection of a valve stem with an operating mechanism according to claim 6, characterized in that the lower part of the tenon block (8) is in interference fit connection with the mortise.

8. Anti-loose stop device for connection of a valve stem with an operating mechanism according to claim 6, characterized in that the lower part of the tenon block (8) is in threaded connection with the mortise.

9. A locking stop device for connection of a valve stem to an operating mechanism according to claim 1, characterised in that the tenon block (8) is of one-piece construction with the valve stem (1).

10. Anti-loose stop device for connection of a valve stem with an operating mechanism according to claim 1, characterized in that the locking piece (7) is polygonal, gear-shaped or spline-shaped.

11. Anti-loose stop device for connection of a valve stem with an operating mechanism according to claim 1, characterized in that the tenon block (8) is polygonal, gear-shaped or spline-shaped.

12. Anti-loose stop device for connecting a valve rod with an operating mechanism according to claim 1, characterized in that the ball head (3) is fixedly connected with the valve rod (1) by a thread.

Technical Field

The invention belongs to the technical field of mechanical connection structures, and particularly relates to an anti-loosening and stopping device for connecting a valve rod with an operating mechanism.

Background

A high-pressure regulating valve (hereinafter referred to as a regulating valve) of a steam turbine is an important ring of a steam turbine regulating system, one steam turbine usually consists of a high-pressure cylinder and a low-pressure cylinder, the high-pressure cylinder and the low-pressure cylinder are matched with the high-pressure regulating valve and the low-pressure regulating valve, and the regulating valve is usually driven by an operating mechanism to control the steam quantity entering the steam turbine to regulate the rotating speed and the power of the steam turbine, so that the steam turbine stably operates under a designed working condition, the steam inlet of the steam turbine can be quickly closed in an emergency, and a unit; it can be seen that the control valve is of great importance for the reliable operation of steam turbines and even power stations.

The valve rod of the traditional steam turbine high-pressure regulating valve is connected with the operating mechanism through a ball head, the ball head is fixed on the valve rod through threads, and the threads are prevented from loosening through a transverse pin structure. In actual operation, the pull rod of the operating mechanism drives the ball head and the valve rod to move up and down, so that the opening of the valve is adjusted.

However, in the conventional structure, the anti-loosening and stopping of the ball head thread are realized through the transverse pin, all the torsional force generated between the valve rod and the ball head in the operation process is borne by the transverse pin, the cross-sectional area of the transverse pin is relatively small, the anti-loosening and stopping reliability is poor, the requirements on the strength and the toughness of the material of the transverse pin are high, high-strength steel made of special materials must be used, and common materials cannot be used for replacing the high-strength steel.

And the bulb passes through the screw thread and is connected with the valve rod, and threaded connection itself has certain clearance, uses after a period, receives the vibration influence, and the clearance of screw thread can enlarge because of wearing and tearing for there is certain axial rock in bulb and the connection of valve rod. After the transverse pin is installed, when the valve rod is stressed during working, due to the existence of a thread gap, the transverse pin inevitably bears the shearing force along the axial direction of the valve rod, the shearing force is intensively acted at the connecting thread position of the ball head and the valve rod, the transverse pin is tightly matched with the valve rod pin hole and the ball head pin hole, the material hardness of the transverse pin is high, and under the action of the shearing force of the valve rod, great shearing damage is generated on the transverse pin. The high-pressure regulating valve needs to be continuously regulated in the running of the unit, meanwhile, the regulating valve and the steam pipeline are disturbed by high-speed steam to generate excitation vibration with certain strength, the transverse pin is frequently stressed due to the up-and-down frequent action of the valve rod, the transverse pin is finally broken, the anti-loosening stop structure fails, the valve rod is seriously caused to fall off, and great risk is brought to the safe and stable running of the unit.

In addition, in order to ensure that the pin holes on the ball head and the valve rod are aligned simultaneously in the circumferential direction and the axial direction, a strict matching relation exists between the pin holes, the valve rod and the ball head assembly can only be integrally replaced when the defect is replaced, the damaged parts cannot be replaced independently, and the maintenance economy is poor.

Therefore, it is highly desirable to develop a locking structure for connecting a valve rod and an operating mechanism, which can effectively eliminate the disadvantages of poor locking reliability, poor maintenance economy, high requirement on the material of a transverse pin, easy abrasion and breakage of the transverse pin, and the like of the conventional structure.

Disclosure of Invention

The invention aims to provide an anti-loosening stop device for connecting a valve rod and an operating mechanism, which can effectively overcome the defects of poor anti-loosening stop reliability, poor maintenance economy, high requirement on material of a transverse pin, easy abrasion and breakage of the transverse pin and the like of the traditional structure.

The technical scheme for realizing the purpose of the invention is as follows: a check and stop device for connection of a valve stem to an operating mechanism, the device comprising: the device comprises a valve rod, a transverse pin, a ball head, a lower clamping plate, an adjusting pad, an upper clamping plate, a locking block, a tenon block, a clamping groove and a pin hole;

the upper clamping plate is positioned right above the lower clamping plate, and the adjusting pad is positioned between the lower clamping plate and the upper clamping plate; the lower clamping plate, the adjusting pad and the upper clamping plate are fixedly connected to form a cavity; the lower clamping plate is sleeved at the lower part of the valve rod; the ball head is arranged in a cavity formed by the lower clamping plate, the adjusting pad and the upper clamping plate;

a vertically through connecting hole is formed in the center of the inner part of the ball head, and the ball head is fixedly connected with the upper part of the valve rod through the connecting hole; the upper part of the valve rod is provided with a transverse pin hole which is transversely communicated, the center position of the inner part of the ball head is provided with a transverse pin hole which is transversely communicated, and the pin hole of the ball head is matched and aligned with the transverse pin hole of the valve rod; the transverse pin is arranged in the aligned pin hole and the transverse pin hole;

a clamping groove communicated with the connecting hole is formed in the center of the upper end of the ball head, and the locking block is arranged in the clamping groove; a first vertically through mortise is arranged at the center of the locking block; the upper portion of tenon piece is located the first tongue-and-groove of locking piece, and the lower part of tenon piece is connected with the top of valve rod.

Further, the upper surface middle part of lower plate is equipped with first hemisphere hole, and the lower surface middle part of punch holder is equipped with second hemisphere hole, and the middle part of adjustment pad is equipped with the round hole that link up, and first hemisphere type hole, round hole and second hemisphere pore pair link up and form the cavity for hold the bulb.

Furthermore, first bolt holes are uniformly formed in the lower clamping plate around the circumference of the first hemispherical hole, vertically through second bolt holes are uniformly formed in the upper clamping plate around the circumference of the second hemispherical hole, third bolt holes are uniformly formed in the adjusting pad around the circumference of the round hole, and the first bolt holes, the second bolt holes and the third bolt holes are correspondingly through; the connecting bolt is arranged in the first bolt hole, the second bolt hole and the third bolt hole, and the lower clamping plate, the adjusting pad and the upper clamping plate are fixedly connected through the connecting bolt.

Further, the lower surface middle part of lower plate is equipped with the through-hole of vertical link up, and the through-hole is link up with first hemisphere shape hole, and the lower part of valve rod is located to the lower plate through the through-hole cover.

Further, the pin hole is of an elongated structure, and the length of the pin hole is larger than the diameter of the transverse pin.

Furthermore, a second mortise is arranged in the center of the top of the valve rod, and the lower portion of the tenon block is detachably connected with the second mortise.

Further, the lower part of the tenon block is connected with the mortise in an interference fit manner.

Further, the lower part of the tenon block is connected with the mortise through threads.

Furthermore, the tenon block and the valve rod are of an integrally formed structure.

Further, the locking piece is polygonal, gear-shaped or spline-shaped.

Further, the tenon block is polygonal, gear-shaped or spline-shaped.

Further, the ball head is fixedly connected with the valve rod through threads.

The invention has the beneficial technical effects that:

1. the transverse pin and the locking block in the anti-loosening and stopping device for connecting the valve rod and the operating mechanism realize the anti-loosening and stopping functions of the connecting threads of the ball head and the valve rod, the anti-loosening and stopping functions of the connecting threads cannot be lost after a single structure fails, the dual-protection effect is achieved, and the reliability is higher;

2. the torsion force of the ball head in the anti-loosening and stopping device for connecting the valve rod and the operating mechanism is jointly borne by the transverse pin and the locking block, wherein the locking block is stressed mainly, and the transverse pin is assisted, because the locking block is larger in stress area and can bear larger load, the transverse pin and the locking block have no special requirements on the material;

3. the locking block in the anti-loosening and stopping device for connecting the valve rod and the operating mechanism does not limit axial shaking of the ball head and the valve rod, and a pin hole in the ball head is axially processed into a long hole along the valve rod, so that axial shaking of the transverse pin in a certain range can be allowed, the locking block and the transverse pin are not influenced by the axial shaking between the ball head and the valve rod, and the risk of failure of an anti-loosening structure of the transverse pin due to axial shearing force is eliminated;

4. the pin hole of the ball head in the anti-loosening and stopping device for connecting the valve rod and the operating mechanism is a long hole, no special matching requirement exists in the axial direction with the pin hole on the valve rod, the valve rod and the ball head can be independently replaced, and the maintenance economy is improved;

5. the pin hole of the ball head in the anti-loosening and stopping device for connecting the valve rod and the operating mechanism is an elongated hole, so that the ball head is allowed to be adjusted in position relative to the valve rod within a certain axial range, the overall length of the valve rod and the ball head is adjustable, the zero adjustment of the valve is convenient, and the maintenance process is simplified.

Drawings

FIG. 1 is a schematic structural view of an anti-loose stopping device for connecting a valve rod with an operating mechanism, provided by the invention;

FIG. 2 is a partial exploded view of a check stop device for a valve stem to operator mechanism according to the present invention;

fig. 3 is a partial sectional view of a check stop device for connecting a valve stem to an operating mechanism according to the present invention.

In the figure: 1. a valve stem; 2. a transverse pin; 3. a ball head; 4. a lower splint; 5. an adjustment pad; 6. an upper splint; 7. a locking block; 8. a tenon block; 9. a card slot; 10. a pin hole.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

As shown in fig. 1-3, the present invention provides a locking and stopping device for connecting a valve rod with an operating mechanism, comprising: the device comprises a transverse pin 2, a ball head 3, a lower clamping plate 4, an adjusting pad 5, an upper clamping plate 6, a locking block 7, a tenon block 8, a clamping groove 9 and a pin hole 10.

As shown in fig. 1, the upper clamping plate 6 is located right above the lower clamping plate 4, and the adjusting pad 5 is located between the lower clamping plate 4 and the upper clamping plate 6, and is used for adjusting the fit clearance between the ball 3 and the upper clamping plate 6, the lower clamping plate 4. The middle part of the upper surface of the lower clamping plate 4 is provided with a first hemispherical hole, and the aperture of the first hemispherical hole is matched with the outer diameter of the ball head 3; a second hemispherical hole is formed in the middle of the lower surface of the upper clamping plate 6, and the aperture of the second hemispherical hole is matched with the outer diameter of the ball head 3; a through round hole is arranged in the middle of the adjusting pad 5, and the aperture of the round hole is matched with the outer diameter of the ball head 3; the first hemispherical hole, the round hole and the second hemispherical hole correspondingly penetrate through and form a cavity.

As shown in fig. 1, first bolt holes are uniformly formed in the lower clamp plate 4 around the circumference of the first hemispherical hole, vertical through second bolt holes are uniformly formed in the upper clamp plate 6 around the circumference of the second hemispherical hole, third bolt holes are uniformly formed in the adjusting pad 5 around the circumference of the round hole, and the first bolt holes, the second bolt holes and the third bolt holes are correspondingly communicated and matched with the connecting bolts. . The connecting bolts are sequentially inserted into the second bolt holes, the third bolt holes and the first bolt holes from top to bottom, and the lower clamp plate 4, the adjusting pad 5 and the upper clamp plate 4 are fixedly connected through the connecting bolts.

As shown in fig. 1, the upper clamp plate 6 is long, and both ends of the upper clamp plate 6 are connected to the operating mechanism tie rods.

As shown in fig. 1-3, the lower surface of the lower clamp plate 4 is provided with a through hole which penetrates up and down, the through hole is matched with the lower part of the valve rod 1, the valve rod 1 can penetrate through the through hole, and the lower clamp plate 4 is sleeved on the lower part of the valve rod 1 through the through hole. The ball head 3 is spherical, is positioned right above the valve rod 1 and is arranged in a cavity formed by the first hemispherical hole, the round hole and the second hemispherical hole; a connecting hole which vertically penetrates through the ball head 3 is formed in the center of the interior of the ball head 3, and an internal thread is formed in the connecting hole; valve rod 1 is cylindric, and the upper portion of valve rod 1 is equipped with the external screw thread, and the internal thread of connecting hole cooperatees with the external screw thread of valve rod 1, passes through thread fixed connection with bulb 3 and valve rod 1.

As shown in fig. 2-3, the upper part of the valve rod 1 is provided with a circular transverse pin hole which transversely penetrates through the valve rod 1, and the aperture of the transverse pin hole is matched with the diameter of the transverse pin 2; a long pin hole 10 penetrating through the ball head 3 from left to right is arranged at the center of the inner part of the ball head 3, the width of the pin hole 10 is matched with the diameter of the transverse pin 2, and the length of the pin hole 10 is larger than the diameter of the transverse pin 2; the pin hole 10 of the ball head 3 is matched and aligned with the transverse pin hole of the valve rod 1 for installing the transverse pin 2. The transverse pin 2 is matched with the aligned pin hole 10 and the aligned transverse pin hole, and is inserted into the aligned pin hole 10 and the aligned transverse pin hole, so that the ball head 3 is prevented from rotating relative to the valve rod 1, and the anti-loosening and stopping effects are realized.

Because the pinhole 10 is along axial processing long shape hole, allow horizontal round pin 2 along the axial in pinhole 10, vertical direction rocks or carries out position control promptly for horizontal round pin 2 does not receive the axial between bulb 3 and valve rod 1 and rocks the influence, has eliminated horizontal round pin 2 because of the risk that axial shearing force leads to anti loosening structure to become invalid.

As shown in fig. 2-3, a clamping groove 9 penetrating through the connecting hole is formed in the center of the upper end of the ball head 3, and the clamping groove 9 is of an octagonal structure matched with the locking block 7 and used for accommodating the locking block 7. The locking piece 7 is of an octagonal structure corresponding to the clamping groove 9, the upper portion of the locking piece is a spherical surface, the locking piece 7 is installed in the clamping groove 9, and the upper surface of the locking piece 7 and the upper surface of the ball head 3 form a complete spherical surface.

As shown in fig. 2-3, a first mortise penetrating the locking block 7 from top to bottom is disposed at the center of the locking block 7, and the first mortise has a quadrilateral structure matching with the tenon block 8 and is used for inserting the tenon block 8. The top center position of valve rod 1 is equipped with the second tongue-and-groove, and the second tongue-and-groove corresponds with first tongue-and-groove, is the quadrangle structure with tenon piece 8 assorted equally. The tenon block 8 is in a shape of a long and thin rod, the cross section of the tenon block is in a quadrilateral corresponding to the first mortise and the second mortise, the upper part of the tenon block 8 is inserted into the first mortise of the locking block 7 through interference fit, and the lower part of the tenon block 8 is inserted into the second mortise of the valve rod 1 through interference fit. The locking piece 7 and the tenon piece 8 are matched together to prevent the ball head 3 from rotating relative to the valve rod 1, so that the locking and stopping effects are realized.

It should be noted that the tenon block 8 and the top of the valve rod 1 can be connected through a thread, and the tenon block 8 is finely adjusted in the circumferential direction to match the tenon block 8 with the first mortise on the lock block 7. In addition, the tenon block 8 and the valve rod 1 can be processed into a whole to form an integrated structure according to requirements.

It should be noted that the locking block 7 and the matching slot, the tenon block 8 and the matching mortise may be designed to be polygonal, gear-shaped or spline-shaped, and the anti-loose locking function exerted by different shapes and the anti-loose locking principle are not different, so that no further description is given.

The installation process of the anti-loosening and stopping device for connecting the valve rod and the operating mechanism is as follows:

step (1), sleeving a lower clamping plate 4 on a valve rod 1, and enabling the valve rod 1 to penetrate through a through hole of the lower clamping plate 4 and expose a thread on the upper part of the valve rod 1;

step (2), installing the ball head 3 on the upper part of the valve rod 1 through threaded connection, adjusting the total length of the ball head 3 and the valve rod 1, and aligning a transverse pin hole on the valve rod 1 with a long pin hole 10 on the ball head 2;

step (3), penetrating the transverse pin 2 into a long pin hole on the ball head 3 and a transverse pin hole on the valve rod 10, wherein a certain gap is kept between the transverse pin 2 and the upper and lower cylindrical surfaces of the long pin hole 10 on the ball head 3, so that the transverse pin 2 has a certain free shaking gap in the long pin hole 10 of the ball head 3 along the axial direction, and the free gap is moderate in size and preferably 0.5-2 mm;

step (4), the tenon block 8 is installed on the top of the valve rod 1 through a tenon groove or a thread on the top of the valve rod 1, or the tenon block 8 is directly processed into a whole with the valve rod 1 to form an integrally formed structure;

step (5), the locking block 7 is installed in a polygonal clamping groove in the upper portion of the ball head 3, meanwhile, the tenon block 8 is inserted into a polygonal mortise in the locking block 7, the locking block 7 can be repaired as required, if the tenon block 8 is in threaded connection with the valve rod 1, the tenon block 8 can also be finely adjusted in the circumferential direction to enable the tenon block 8 to be matched with a first mortise in the locking block 7, and after the locking block 7 is installed, the ball head 3 can be prevented from rotating relative to the valve rod 1 under the matching of the tenon block 8, so that the anti-loosening function is achieved;

step (6), installing the adjusting pad 5 between the upper clamping plate 6 and the lower clamping plate 4, and connecting the upper clamping plate 6, the lower clamping plate 4 and the adjusting pad 5 into a whole by using connecting bolts; the ball 3, the locking piece 7 and the valve rod 1 are arranged in a spherical space formed by the upper clamping plate 6, the lower clamping plate 4 and the adjusting pad 5.

After the installation is finished, the upper clamping plate 6 drives the lower clamping plate 4, the adjusting pad 5, the ball head 3 in the spherical space, the locking block 7 and the valve rod 1 to move together when moving up and down along with the operating mechanism, and the function of adjusting the opening of the adjusting valve is realized.

The present invention has been described in detail with reference to the drawings and examples, but the present invention is not limited to the examples, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention. The prior art can be adopted in the content which is not described in detail in the invention.