CN210770474U

CN210770474U - High-temperature high-pressure spring type safety valve

Info

Publication number: CN210770474U
Application number: CN201921661853.4U
Authority: CN
Inventors: 赵章旭; 林素伟; 郑子林; 项忠祥; 张薇
Original assignee: Yongyi Valve Group Co ltd
Current assignee: Yongyi Valve Group Co ltd
Priority date: 2019-10-08
Filing date: 2019-10-08
Publication date: 2020-06-16
Anticipated expiration: 2029-10-08

Abstract

The utility model relates to a high-temperature and high-pressure spring type safety valve, which comprises a valve body, a valve seat, a valve clack, a guide sleeve, a valve cover, a valve rod and a spring pressure setting device; the method is characterized in that: the spring pressure setting device consists of a coarse adjusting device and a fine adjusting device; the coarse adjustment device comprises a disc spring, an adjustment sleeve, a guide plate and an annular adjustment plate, wherein the disc spring is arranged between the lower end of the adjustment sleeve and a lower spring seat on the valve rod; the fine setting device includes cylindrical spring and regulation swivel nut, adjusts the swivel nut and adopts the external screw thread to install in the screw of adjusting the upper end face, and the cylindrical spring lower extreme passes through the spring holder to be installed on the radial step of valve rod, and the upper end is passed through the pressure equipment of spring gland and is being adjusted the swivel nut lower extreme. The upper position and the lower position of the annular adjusting plate are adjusted, the compression amount of the belleville spring is adjusted, the setting pressure of the valve clack is set, the sealing surface of the valve clack and the valve seat is not abraded during the setting pressure adjustment, the belleville spring is not pressed to be bent to cause the blocking of the valve rod, and the valve clack adjusting device has the advantages of being good in sealing performance, accurate in setting pressure, flexible in valve rod movement, reliable in valve clack opening and.

Description

High-temperature high-pressure spring type safety valve

Technical Field

The utility model relates to a relief valve especially relates to a spring relief valve. The utility model is suitable for a high temperature high pressure vessel relief valve.

Background

The spring type safety valve utilizes a spring to set a setting pressure value, the acting force generated by the compression of the spring is transmitted to a downward acting force of a valve clack through a valve rod, the compression amount of the spring is adjusted to adjust the sealing specific pressure between a sealing surface of the valve clack and a sealing surface of a valve seat, so that the setting pressure value can be preset. The disadvantages are that: because the spring size is great, and the effort is great, drives the spring easily during the regulating spring and produces torsional force to drive valve rod and valve clack rotation easily, the sealed face of valve clack and the sealed face of disk seat produce the wearing and tearing destruction, influence the leakproofness and the accuracy of setting the pressure value, simultaneously, the spring is crooked easily when the compression, drives the valve rod slope, and the valve rod excircle produces friction or card with the guide part easily and dies, influences the flexibility that the valve rod reciprocated and the reliability that the valve was opened and close.

Disclosure of Invention

The utility model discloses to the defect that prior art exists, provide a leakproofness good, set pressure accuracy, valve rod remove nimble, the valve clack opens and close reliable high temperature high pressure spring relief valve.

The technical scheme of the utility model includes valve body, valve seat, valve clack, uide bushing, valve gap, valve rod, spring pressure setting device, the valve seat is installed at the valve body entrance point, the upper end of valve seat stretches into the valve body inner chamber, the upper end of uide bushing is fixedly installed between valve gap and valve body, the valve clack is arranged in the uide bushing, its excircle face and the interior pore wall of uide bushing are in movable fit, the lower end of valve clack is equipped with the valve clack sealing face forming seal with the valve seat sealing face, the lower end of valve rod stretches into; the method is characterized in that: the spring pressure setting device consists of a coarse adjusting device and a fine adjusting device; the coarse adjustment device comprises a disc spring, an adjustment sleeve, a guide plate and an annular adjustment plate, wherein the lower end of the disc spring is mounted on the upper end face of a lower spring seat, the lower end face of the lower spring seat is pressed on a radial step of a valve rod, the lower end of the adjustment sleeve penetrates through a guide hole of the guide plate and is fixedly connected with the upper end of the disc spring, the guide plate is fixedly mounted on a valve cover through a mounting rod, a plurality of adjustment studs are fixedly mounted on the upper end face of the guide plate, a plurality of mounting holes are formed in an annular plane of the annular adjustment plate, the mounting holes are mounted on the adjustment studs through adjustment nuts, and the inner annular face of the lower end of the; the fine setting device includes cylindrical spring and regulation swivel nut, adjusts the swivel nut and adopts the external screw thread to install in the screw of adjusting the upper end face, and its lower extreme stretches into the inner chamber of adjusting the cover, and the cylindrical spring lower extreme passes through the spring holder to be installed on the radial step of valve rod, and the upper end is passed through the pressure equipment of spring cover and is being adjusted the swivel nut lower extreme, and the outer disc of valve rod upper end and regulation swivel nut hole move fit.

In the technical scheme, the inner annular surface at the lower end of the annular adjusting plate is provided with a radial annular step, the annular table surface of the radial annular step is pressed on the upper end surface of the adjusting sleeve, and the inner circular wall is in movable fit with the outer circular surface of the adjusting sleeve.

Among above technical scheme, the valve gap up end is equipped with manual pressure relief device, manual pressure relief device includes: wrench, lift bar, lift plate and lifting nut, lift plate one end are passed through the hinge type and are connected in the valve gap top, and lifting nut installs on the valve rod of lift plate top, and the lift bar passes through the hinge type and installs on the valve cap of lift plate other end below, and the vertical fixed mounting of wrench is at the other end of lift bar.

In above technical scheme, set up the locating plate between spring holder and lifting nut down, this locating plate passes through the bracing piece and installs on the valve bonnet, the locating hole and the valve rod clearance fit at locating plate center.

In above technical scheme, set up the holding ring between locating plate and valve rod, set up down the holding ring between valve rod and the valve rod.

The utility model has the advantages that: the spring pressure setting device is composed of a coarse adjusting device and a fine adjusting device, the coarse adjusting device structurally comprises a disc spring, an adjusting sleeve, a guide plate and an annular adjusting plate, the compression amount of the disc spring is adjusted by adjusting the upper position and the lower position of the annular adjusting plate, the setting pressure of the valve clack is set, the adjusting force is the pressure in the axial direction of the valve rod, the valve rod has no rotating torque force during the pressure setting adjustment, the sealing surface of the valve clack and a valve seat is not abraded, the disc spring cannot be pressed to bend to cause the jamming of the valve rod, the fine adjusting device achieves fine adjustment of the setting pressure, the precision of the setting pressure is improved, the spring force is small, the rotating torque force generated during the adjustment is small, the rotating friction of the valve clack and the radial jamming of the valve rod are avoided, the sealing performance is good.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The high-temperature high-pressure spring type safety valve shown in fig. 1 comprises a valve body 2, a valve seat 1, a valve clack 4, a guide sleeve 6, a valve cover 8, a valve rod 19 and a spring pressure setting device, wherein a lower adjusting ring 3 is installed on the outer side of a sealing surface of the valve seat 1, an upper adjusting ring 5 is installed on the outer circular surface of the lower end of the guide sleeve 6, the lower end of the valve body 2 is an inlet side, a middle flange is arranged at the upper end of the valve body 2, an outlet flange is arranged in the middle of the valve seat 1, the valve seat 1 is installed at an inlet end of the valve body 2, the upper end of the valve seat 1 extends into an inner cavity of the valve body 2, the upper end of the guide sleeve 6 is fixedly installed between the valve cover 8 and the valve body 2, the valve clack 4 is arranged in the; the method is characterized in that: the spring pressure setting device consists of a coarse adjusting device and a fine adjusting device; the coarse adjustment device comprises a disc spring 17, an adjustment sleeve 22, a guide plate 21 and an annular adjustment plate 23, wherein the lower end of the disc spring 17 is mounted on the upper end surface of a lower spring seat 16, the lower end surface of the lower spring seat 16 is pressed on a radial step of a valve rod 19, the lower end of the adjustment sleeve 22 penetrates through a guide hole of the guide plate 21 and is fixedly connected with the upper end of the disc spring 17, the guide plate 21 is fixedly mounted on a valve cover 8 through a mounting rod 18, a plurality of adjustment studs 24 are fixedly mounted on the upper end surface of the guide plate 21, a plurality of mounting holes are formed in an annular plane of the annular adjustment plate 23, the mounting holes are mounted on the adjustment studs 24 through adjustment nuts, and the inner annular surface of the lower end of the annular adjustment plate; the axial position of the annular adjusting plate 23 on the adjusting stud 24 is adjusted to push the adjusting sleeve 22 to compress the disc spring 17, so that the setting pressure of the sealing pair is set, only the axial pressure exists in the adjusting process, the abrasion of the rotating torque generated in the adjusting process in the prior art to the sealing surface of the valve clack and the large radial force generated by the bending of the spring to the valve rod are avoided, and the moving friction force of the valve rod is increased, even the valve rod is clamped. The fine adjustment device comprises a cylindrical spring 20 and an adjusting threaded sleeve 25, the adjusting threaded sleeve 25 is installed in a screw hole in the upper end face of the adjusting sleeve 22 through external threads, the lower end of the adjusting threaded sleeve extends into an inner cavity of the adjusting sleeve 22, the lower end of the cylindrical spring 25 is installed on a radial step of the valve rod 19 through a spring seat, the upper end of the cylindrical spring is pressed at the lower end of the adjusting threaded sleeve 25 through a spring pressing cover, and the outer circular face of the upper end of the valve rod 19 is in movable fit with an inner hole. The compression force of the cylindrical spring 20 is adjusted by adjusting the position of the adjusting threaded sleeve 25 on the adjusting sleeve 22, so that the pressure setting value is finely adjusted, and the precision of the setting pressure value is provided.

The inner ring surface of the lower end of the annular adjusting plate 23 is provided with a radial annular step, the annular table surface of the radial annular step is pressed on the upper end surface of the adjusting sleeve 22, and the inner ring wall is in movable fit with the outer ring surface of the adjusting sleeve 22 to increase the radial positioning of the adjusting sleeve 22.

The 8 up end of valve gap is equipped with manual pressure relief device, manual pressure relief device includes wrench 9, lifting rod 10, lifting plate 11 and

lifting nut

12, and 11 one end of lifting plate is passed through the hinge type and is connected on the stand of valve gap 8 top, and lifting nut 12 fixed mounting is on the valve rod 19 of lifting plate 11 top, and lifting rod 10 one end is passed through the hinge type and is installed on valve gap 8 of lifting plate 11 other end below, and its up end pushes up with 11 lower terminal surfaces of lifting plate and touches, and the vertical fixed mounting of wrench 9 is at the other end of lifting rod 10. When the valve clack needs to be opened manually for pressure relief, the lifting rod 10 is moved by the plate to drive the lifting plate 11 to move upwards, the lifting plate 11 provides an upward acting force for the lifting nut 12 and the valve rod 19, and the valve clack 4 is opened by overcoming the elastic force of the butterfly spring 17 and the cylindrical spring 20.

A positioning plate 14 is arranged between the lower spring seat 16 and the lifting nut 12, the positioning plate 14 is installed on the valve cover 8 through a supporting rod 13, and a positioning hole in the center of the positioning plate 14 is in movable fit with the valve rod 19, so that the radial positioning and guiding of the valve rod 19 are improved.

An upper positioning ring 15 is arranged between the positioning plate 14 and the valve rod 19, a lower positioning ring 7 is arranged between the valve cover 8 and the valve rod 19, and the upper positioning ring 15 and the lower positioning ring 7 are in movable fit with the outer circular surface of the valve rod 19.

In the present embodiment, the guide plate 21 is fixedly mounted on the positioning plate 14 through the mounting rod 18 and then mounted on the valve cover 8 through the support rod 13, which is the same as the guide plate 21 is directly fixedly mounted on the valve cover 8 through the mounting rod 18.

Claims

1. A high-temperature and high-pressure spring type safety valve comprises a valve body (2), a valve seat (1), a valve clack (4), a guide sleeve (6), a valve cover (8), a valve rod (19) and a spring pressure setting device, wherein the outer circular surface of the valve clack (4) is in movable fit with the inner hole wall of the guide sleeve (6), the lower end of the valve clack (4) is provided with a valve clack sealing surface which forms a seal with the valve seat sealing surface, and the lower end of the valve rod (19) extends into the guide sleeve (6) and is connected with the center of the back surface; the method is characterized in that: the spring pressure setting device consists of a coarse adjusting device and a fine adjusting device; the coarse adjustment device comprises a disc spring (17), an adjustment sleeve (22), a guide plate (21) and an annular adjustment plate (23), wherein the lower end of the disc spring (17) is installed on the upper end face of a lower spring seat (16), the lower end face of the lower spring seat (16) is pressed on a radial step of a valve rod (19), the lower end of the adjustment sleeve (22) penetrates through a guide hole of the guide plate (21) and is fixedly connected with the upper end of the disc spring (17), the guide plate (21) is fixedly installed on a valve cover (8) through an installation rod (18), a plurality of adjustment studs (24) are fixedly installed on the upper end face of the guide plate (21), a plurality of installation holes are formed in an annular plane of the annular adjustment plate (23), the installation holes are installed on the adjustment studs (24) through adjustment nuts, and the inner annular face of the lower end of the annular adjustment plate (23) is pressed on the; the fine setting device includes cylindrical spring (20) and regulation swivel nut (25), adjusts swivel nut (25) and adopts the external screw thread to install in the screw of adjusting the cover (22) up end, and the inner chamber of adjusting cover (22) is stretched into to its lower extreme, and cylindrical spring (20) lower extreme passes through the spring holder to be installed on the radial step of valve rod (19), and the upper end is passed through the pressure equipment of spring gland and is being adjusted swivel nut (25) lower extreme, and the outer disc of valve rod (19) upper end and regulation swivel nut (25) hole clearance fit.

2. The high temperature, high pressure spring loaded safety valve of claim 1, wherein: the inner ring surface of the lower end of the annular adjusting plate (23) is provided with a radial annular step, the annular table surface of the radial annular step is pressed on the upper end surface of the adjusting sleeve (22), and the inner circular wall is in movable fit with the outer circular surface of the adjusting sleeve (22).

3. A high-temperature high-pressure spring type safety valve according to claim 1 or 2, wherein: valve gap (8) up end is equipped with manual pressure relief device, manual pressure relief device includes wrench (9), lifting rod (10), lifting plate (11) and lifting nut (12), lifting plate (11) one end is passed through the hinge type and is connected on the stand of valve gap (8) top, lifting nut (12) fixed mounting is on valve rod (19) of lifting plate (11) top, lifting rod (10) one end is passed through the hinge type and is installed on valve gap (8) of lifting plate (11) other end below, its up end touches with lifting plate (11) lower terminal surface top, the other end at lifting rod (10) is fixed mounting to wrench (9) vertical.

4. A high temperature and high pressure spring type safety valve according to claim 3, wherein: a positioning plate (14) is arranged between the lower spring seat (16) and the lifting nut (12), the positioning plate (14) is installed on the valve cover (8) through a supporting rod (13), and a positioning hole in the center of the positioning plate (14) is in movable fit with the outer circular surface of the valve rod (19).

5. The high temperature, high pressure spring loaded safety valve of claim 4, wherein: an upper positioning ring (15) is arranged between the positioning plate (14) and the valve rod (19), a lower positioning ring (7) is arranged between the valve cover (8) and the valve rod (19), and the upper positioning ring (15) and the lower positioning ring (7) are in movable fit with the outer circular surface of the valve rod (19).