CN219317754U

CN219317754U - Small-caliber high-temperature high-pressure electric stop valve

Info

Publication number: CN219317754U
Application number: CN202220437398.5U
Authority: CN
Inventors: 宋建中; 方建伟; 沈峰; 张国华
Original assignee: HUANANG POWER STATION INSTRUMENT AND METER FACTORY SUZHOU CITY
Current assignee: HUANANG POWER STATION INSTRUMENT AND METER FACTORY SUZHOU CITY
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2023-07-07
Anticipated expiration: 2032-03-02

Abstract

The utility model discloses a small-caliber high-temperature high-pressure stop valve, which comprises a valve shell, a valve ball and a valve rod assembly, wherein a fluid channel and a sealing body are arranged in the valve shell, the sealing body is in threaded connection with the valve shell, a through hole is arranged in the center of the sealing body, the fluid channel is communicated with the through hole, one end of the sealing body corresponding to the through hole forms an end sealing surface, and the valve ball is arranged at the bottom end of the valve rod assembly and is matched with the end sealing surface on the sealing body, and the valve rod assembly is characterized in that: in the valve rod assembly, a groove is formed in the top of the valve rod; the electric valve is provided with an actuating mechanism, the actuating mechanism is provided with a driving rod, the lower end of the driving rod is matched with a groove at the top of the valve rod, a hand wheel is fixed at the upper end of the driving rod, and the middle part of the driving rod is connected with an output part of an electric driving device; the electric driving device is fixedly connected with the valve casing through a fixed support. The utility model realizes the integration of the manual actuating mechanism and the electric actuating mechanism, and can prolong the service time of the valve body and reduce the downtime required by maintenance.

Description

Small-caliber high-temperature high-pressure electric stop valve

Technical Field

The utility model relates to a stop valve, in particular to a high-temperature high-pressure stop valve, and especially relates to a small-caliber high-temperature high-pressure stop valve which is mainly driven by an electric motor and can be driven manually.

Background

The manual stop valve generally comprises a valve body or a valve shell, a valve ball or a valve core, a valve rod and a hand wheel, wherein a fluid channel is arranged on the valve body, and the hand wheel rotates to drive the valve rod to move up and down to drive the valve core to open or close the fluid channel. Chinese patent No. 2623985Y discloses a high-temperature high-pressure stop valve, which is characterized in that a valve sealing body in threaded connection with a valve body is arranged, and sealing is realized by matching a valve ball with an end sealing surface of the valve sealing body. Once the sealing surface is damaged, only the valve sealing body needs to be replaced, so that the service time of the valve body is prolonged, and the downtime required for maintenance is reduced.

However, for small-caliber high-temperature high-pressure stop valves with calibers of 6mm to 10mm, working temperatures of 550 ℃ or higher and working pressures of 20Mpa or higher, the torque force at the time of closing is 17 newtons or higher, and the radius of a matched hand wheel is generally 4 cm to 5cm due to the limit of the installation position of a valve body, so that the difficulty of manual opening or closing is great.

The electric stop valve uses an electric actuating mechanism to replace a hand wheel to drive the valve rod to rotate so as to realize the opening and closing of the valve. When working under the working condition of high temperature and high pressure, the electric stop valve has the advantages of convenient operation and control and high safety because manual operation is not needed, and on the other hand, the automatic control is convenient to realize. However, when the power supply is interrupted or the internal circuit is failed, the electric stop valve cannot control the opening or closing of the stop valve in time, and the production accident can be caused.

Chinese patent application CN113154052a discloses a novel stop valve, wherein a valve stem nut is connected to the top of the valve stem, and when the valve stem nut is connected to a hand wheel, the stop valve is a manual stop valve, and when the valve stem nut is connected to an electric device, the stop valve is an electric stop valve. The interchangeability of the manual stop valve and the electric stop valve is improved, however, under the same installation structure, only one of the manual stop valve or the electric stop valve can be selected, and the problem of opening and closing when the electric stop valve cannot be used can not be solved.

The Chinese patent No. 102384300A discloses an electric and manual double-acting half-balance large-depth sea-going stop valve, and outputs of a hand wheel and an electric actuating mechanism arranged on one side of the stop valve are transmitted to a valve rod through a large gear, so that manual and electric dual-purpose is realized. However, this scheme structure side direction is electronic occupation space big, is not applicable to high temperature application occasion, and simultaneously, its drive structure is complicated relatively, when being applied to in the structure that CN2623985Y discloses, still can meet the difficulty of actuating mechanism dismouting to accomplish the change of valve seal body, a series of problems such as the cooperation adjustment that relate to the gear during reinstallation, can not exert the effect that sets up valve seal body in order to prolong valve body life and reduce the required downtime of maintenance in the stop valve that CN2623985Y discloses.

Disclosure of Invention

The utility model aims to provide a small-caliber high-temperature high-pressure electric stop valve, which is convenient to replace a valve body sealing piece on the premise of not disassembling a stop valve body while realizing two using modes of electric control and manual control through structural design.

In order to achieve the aim of the utility model, the utility model adopts the following technical scheme: the utility model provides a small-bore high temperature high pressure electricity stop valve, includes valve casing, valve ball, valve rod subassembly, be equipped with fluid passage and sealing body in the valve casing, sealing body and valve casing threaded connection, sealing body central authorities are equipped with the through-hole, fluid passage is through the through-hole intercommunication, the one end that corresponds the through-hole on the sealing body constitutes the tip seal face, the valve ball is installed in valve rod subassembly bottom and with the tip seal face cooperation on the sealing body, in the valve rod subassembly, open at the top of valve rod has the recess; the electric valve is provided with an actuating mechanism, the actuating mechanism is provided with a driving rod, the lower end of the driving rod is matched with a groove at the top of the valve rod, a hand wheel is fixed at the upper end of the driving rod, and the middle part of the driving rod is connected with an output part of an electric driving device; the electric driving device is fixedly connected with the valve casing through a fixed support.

In the above technical scheme, through forming actuating lever and valve rod among the actuating mechanism into the body structure, set up the recess on the valve rod top, the recess can be rectangular or interior hexagon for example, and set up rather than the matched connection end in actuating lever's lower extreme, directly insert actuating lever one end in the recess, can make the actuating lever drive the valve rod and rotate. Therefore, the actuating mechanism and the stop valve body can be conveniently separated, and the replacement operation of the sealing body in the valve housing is convenient. Meanwhile, the driving rod can be driven by the electric driving device and can be driven by the hand wheel, and the electric and manual dual-purpose is realized through a simple structure.

In the above technical scheme, the electric driving device mainly comprises an electric driving shell, a motor arranged on the electric driving shell, and a gear reduction transmission mechanism arranged in the electric driving shell, wherein an output gear of the gear reduction transmission mechanism is sleeved on the driving rod.

In the technical scheme, the reduction ratio of the gear reduction transmission mechanism is 100-200:1. A clutch structure may be provided between the gear reduction rotation mechanism and the drive lever, as required. Therefore, when the stop valve needs to be opened and closed by the hand wheel under emergency conditions, the gear reduction mechanism can be separated through the clutch structure, and the possible damage to the electric drive system in the hand wheel operation process is avoided.

The preferred technical scheme, the fixed bolster has the roof that is located valve pole top, and the trompil in the middle of the roof, the valve rod top recess is inserted in this hole to the actuating lever lower extreme, the roof both sides are connected with the curb plate respectively, the both sides that are opposite on the valve casing are equipped with fluid channel's import and export respectively, and two sides adjacent with this both sides are the junction surface, and two curb plate lower parts of fixed bolster are fixed on the junction surface of valve casing respectively through the screw.

Preferably, the fixing support is integrally formed by bending a plate.

Further technical scheme, two lateral plates are respectively provided with observation holes.

Due to the application of the technical scheme, compared with the prior art, the utility model has the following advantages:

1. according to the utility model, through the structural design, the actuating mechanism can be conveniently installed on or removed from the stop valve body, so that the actuating mechanism does not influence the replacement of the valve sealing body, and the service time of the valve body can be prolonged, and the downtime required by maintenance can be reduced;

2. according to the utility model, the driving rod is arranged, so that the integration of the manual executing mechanism and the electric executing mechanism is conveniently realized;

3. the fixing support is arranged on the valve casing through the screw, and when the actuating mechanism is dismounted, the actuating mechanism can be integrally dismounted only by taking down the screw on the fixing support, and the inside of the actuating mechanism is not required to be dismounted, so that the maintenance and the maintenance of the stop valve body are greatly facilitated.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a cross-sectional view A-A of FIG. 1;

FIG. 5 is a schematic illustration of the actuator of FIG. 1;

fig. 6 is a top view of the interior of the electro-drive housing of fig. 5.

Wherein: 1. a valve housing; 2. a sealing body; 3. a fluid channel; 4. a valve ball; 5. a valve stem assembly; 6. a compression nut; 7. a valve rod positioning seat; 8. a graphite filler; 9. a filler cover; 10. a valve rod guide sleeve; 11. a valve stem housing; 12. a valve rod thread sleeve; 13. an adjusting ring; 14. a compression nut; 15. a groove; 16. an actuator; 17. a hand wheel; 18. a driving rod; 19. a planar thrust bearing; 20. a top plate; 21. a side plate; 22. a fixed bracket; 23. a connection surface; 24. a screw; 25. an observation hole; 26. an electric drive housing; 27. and a motor.

Detailed Description

The utility model is further described below with reference to the accompanying drawings and examples:

embodiment one: referring to fig. 1 to 4, a small-caliber high-temperature high-pressure electric stop valve comprises a valve shell 1, a valve ball 4 and a valve rod assembly 5, wherein a fluid channel 3 and a sealing body 2 are arranged in the valve shell 1, the sealing body 2 is in threaded connection with an inner cavity of the valve shell 1, a through hole is formed in the center of the sealing body 2, the fluid channel 3 is communicated through the through hole, one end of the sealing body 2 corresponding to the through hole forms an end sealing surface, and the valve ball 4 is arranged at the bottom end of the valve rod assembly 5 and is matched with the end sealing surface on the sealing body 2.

Referring to fig. 4, the lower part of the valve rod is arranged in the valve rod positioning seat 7, the valve rod positioning seat 7 is tightly pressed and fixed on the valve shell by the compression nut 6, graphite packing 8 is arranged between the valve rod and the valve rod positioning seat 7 and is sealed by a packing cover 9, the middle part of the valve rod is positioned in the valve rod guide sleeve 10 and limited by the valve rod shell 11, a valve rod thread sleeve 12 is arranged between the valve rod and the valve rod shell 11 and limited by the adjustment ring 13 and the compression nut 14, and a plane thrust bearing 19 is respectively arranged between the upper surface of the convex ring of the valve rod thread sleeve 12 and the adjustment ring 13 and between the lower surface and the valve rod shell 11.

In the valve rod assembly 5, a groove 15 is formed in the top of the valve rod; the actuating mechanism 16 is arranged, the actuating mechanism 16 is provided with a driving rod 18, the lower end of the driving rod 18 is matched with the groove 15 at the top of the valve rod, the upper end of the driving rod is fixedly provided with a hand wheel 17, and the middle part of the driving rod is connected with the output part of an electric driving device.

The valve is provided with a fixing support 22, see fig. 1, the fixing support 22 is formed by integrally bending a plate, the plate is provided with a top plate 20 positioned above the top end of a valve rod, a hole is formed in the middle of the top plate 20, the lower end of a driving rod is inserted into a groove at the top of the valve rod through the hole, two sides of the top plate 20 are respectively connected with a side plate 21, two opposite sides on a valve shell are respectively provided with an inlet and an outlet of a fluid channel, two sides adjacent to the two sides are respectively provided with a connecting surface 23, and the lower parts of the two side plates 21 of the fixing support are respectively fixed on the connecting surface 23 of the valve shell through screws 24 after being bent inwards. Referring to fig. 2, the two side plates 21 are respectively provided with observation holes 25.

The electric driving device is fixedly connected with the valve casing through a fixed support.

Referring to fig. 5, the electric driving device mainly comprises an electric driving shell 26, a motor 27 arranged on the electric driving shell, and a gear reduction transmission mechanism arranged in the electric driving shell, wherein the gear reduction transmission mechanism is shown in fig. 6, and an output gear of the gear reduction transmission mechanism is sleeved on a driving rod.

In this embodiment, the motor operating voltage used is 24 volts, the normal operating speed is 30-50 rpm, the highest efficiency point of the output torque is 2.532 nm, and the maximum output torque is 7.356 nm. The reduction ratio of the matched gear reduction rotating mechanism is 160:1. So that it is ensured that sufficient torque is provided to drive the valve stem to rotate.

When the stop valve is normally used, the motor drives the gear reduction transmission mechanism, and the valve rod is driven to rotate through the driving rod, so that the valve rod moves upwards or downwards, and the valve ball is separated from or seals the end sealing surface of the sealing body, so that the stop valve is opened or closed. When the power supply is failed or the electric driving device is failed, the stop valve can be directly opened or closed by rotating the hand wheel.

When the sealing surface of the sealing body and the valve ball are worn and need to be maintained, the actuating mechanism and the fixed bracket can be integrally taken down as long as a plurality of screws at the bottom of the fixed bracket are loosened, the stop valve is maintained, the operation is convenient, and the stop time is saved.

Claims

1. The utility model provides a small-bore high temperature high pressure electricity stop valve, includes valve casing, valve ball, valve rod subassembly, be equipped with fluid passage and sealing body in the valve casing, sealing body and valve casing threaded connection, sealing body central authorities are equipped with the through-hole, fluid passage warp the through-hole intercommunication, the one end that corresponds the through-hole on the sealing body constitutes the tip sealed face, the valve ball install in valve rod subassembly bottom and with the tip sealed face cooperation on the sealing body, its characterized in that: in the valve rod assembly, a groove is formed in the top of the valve rod; the electric valve is provided with an actuating mechanism, the actuating mechanism is provided with a driving rod, the lower end of the driving rod is matched with a groove at the top of the valve rod, a hand wheel is fixed at the upper end of the driving rod, and the middle part of the driving rod is connected with an output part of an electric driving device; the electric driving device is fixedly connected with the valve casing through a fixed support.

2. The small-caliber high-temperature high-pressure electric shutoff valve of claim 1, wherein: the electric driving device mainly comprises an electric driving shell, a motor arranged on the electric driving shell and a gear reduction transmission mechanism arranged in the electric driving shell, and an output gear of the gear reduction transmission mechanism is sleeved on the driving rod.

3. The small-caliber high-temperature high-pressure electric shutoff valve of claim 2, wherein: the reduction ratio of the gear reduction transmission mechanism is 100-200:1.

4. The small-caliber high-temperature high-pressure electric shutoff valve of claim 2, wherein: the fixed bolster has the roof that is located valve rod top, and the trompil in the middle of the roof, the actuating lever lower extreme passes this hole and inserts valve rod top recess, the roof both sides are connected with the curb plate respectively, the both sides that are opposite on the valve casing are equipped with fluid channel's import and export respectively, and two sides adjacent with this both sides are the junction surface, and two curb plate lower parts of fixed bolster are respectively through the fix with screw on the junction surface of valve casing.

5. The small-caliber high-temperature high-pressure electric shutoff valve of claim 4, wherein: the fixed support is formed by integrally bending a plate.

6. The small-caliber high-temperature high-pressure electric shutoff valve of claim 4, wherein: the two side plates are respectively provided with an observation hole.