CN216479123U

CN216479123U - Automatic adjusting spring type safety valve

Info

Publication number: CN216479123U
Application number: CN202123028756.1U
Authority: CN
Inventors: 郑子林; 罗立华; 陈斌; 干爱根
Original assignee: Yongyi Valve Group Co ltd
Current assignee: Yongyi Valve Group Co ltd
Priority date: 2021-12-06
Filing date: 2021-12-06
Publication date: 2022-05-10
Anticipated expiration: 2031-12-06

Abstract

The utility model relates to an automatic adjust spring relief valve, include: the valve comprises a valve body, a valve seat, a valve clack, a recoil disc, a guide sleeve, a valve cover, a valve rod and a spring pressure setting device, wherein the valve seat is provided with an adjusting ring; the method is characterized in that: the regulating ring is provided with an automatic regulating device, when the medium pressure of the inlet channel rises to the setting pressure of the channel, and the valve clack is opened, the automatic regulating device drives the regulating ring to move upwards, so that the valve clack and the recoil disc are subjected to larger recoil force and quickly rise, and when the medium pressure at the inlet channel falls, the automatic regulating device drives the regulating ring to move downwards, so that the valve clack and the recoil disc reduce the recoil force and quickly fall.

Description

Automatic adjusting spring type safety valve

Technical Field

The utility model relates to a relief valve especially relates to spring relief valve.

Background

Traditional spring relief valve, in order when the valve clack opens, make the valve clack reach the full open-close state, be provided with the recoil dish in the valve clack outside, be provided with the regulation circle in disk seat upper portion excircle, through threaded connection between regulation circle and the disk seat, when the valve is in the closed condition, through manual rotatory regulation circle, thereby adjust the vertical distance between recoil dish and the regulation circle, when discharging, change the flow direction of medium, further promotion recoil dish rebound, thereby make the valve clack open more easily, reach the full open-close state, its shortcoming lies in: although the valve clack is easier to be fully opened under the matching of the recoil disc and the adjusting ring, when the recoil disc is lifted upwards by the recoil force of a medium, when the pressure of the medium at the inlet side is reduced and the valve clack is returned to the seat, the position of the adjusting ring is fixed, the reduction of the recoil disc is hindered by the adjusting ring, the recoil disc is more difficult to be moved downwards, when the pressure of the medium at the inlet side is lower, the recoil disc and the valve clack can return to the seat, and the valve can be closed, so that the return pressure of the valve is low, the opening and closing pressure difference is large, and the energy waste is large.

Disclosure of Invention

Aiming at the technical defects in the prior art, the utility model provides a valve flap opening mechanism, when the valve flap is opened, the adjusting ring automatically moves upwards, so that the valve flap rapidly reaches the full-opening state; when the valve is closed, the regulating ring moves downwards automatically, the valve clack returns to the seat quickly, and the automatic regulating spring type safety valve with small opening and closing pressure difference is used.

The utility model discloses a following technical scheme realizes:

an automatically adjusting spring safety valve comprising: the valve body is provided with an inlet channel and a discharge channel, the valve seat is installed in the inlet channel of the valve body, an adjusting ring is arranged on the outer side of a sealing surface of the valve seat, the upper end of the guide sleeve is fixedly installed between the valve body and the valve cover, a guide hole at the lower end of the guide sleeve is in movable fit with a guide column at the upper part of the recoil disc, the valve clack is installed on the lower end face of the recoil disc, the spring pressure setting device is installed between the valve cover and the valve rod, the spring pressure setting device comprises a prepressing spring, an upper spring seat, a lower spring seat and an adjusting threaded sleeve, the adjusting threaded sleeve is installed on the upper part of the valve cover, the lower end of the adjusting threaded sleeve presses the upper spring seat, the lower end of the valve rod presses the recoil disc, and the upper end of the valve rod sequentially penetrates through the lower spring seat, the prepressing spring and the upper spring seat and extends into an inner cavity of the valve cover; the method is characterized in that: the adjusting ring is provided with an automatic adjusting device, the automatic adjusting device is composed of a control ring and a spring, the control ring is provided with a pressure guide cavity and is installed on the outer circular surface of the valve seat, the pressure guide cavity is communicated with the valve seat inlet cavity through a pressure guide hole, the elasticity of the spring is equal to the discharge pressure, and the medium pressure of the valve seat inlet cavity pushes the control ring to drive the adjusting ring to move up and down through the spring.

Furthermore, the adjusting ring is installed on the outer circular surface of the upper portion of the valve seat through threads, a clamping groove is formed in the lower portion of the adjusting ring, a clamping head extending into the clamping groove is arranged at the upper end of the control ring, the spring is installed between the lower end face of the control ring and the radially outer step of the valve seat, a spiral groove is formed in the outer wall of the valve seat, and a protruding block which is movably matched with the spiral groove is formed in the inner wall of the control ring.

Furthermore, an inner hole of the adjusting ring is in dynamic sealing fit with the outer circular surface of the valve seat, a radial annular convex shoulder is arranged at the lower end of the adjusting ring, the outer circular surface of the radial annular convex shoulder is in dynamic sealing fit with the inner circular surface of the control ring, the lower ring surface is communicated with the pressure leading cavity, a limiting step is arranged between the lower ring surface of the radial annular convex shoulder and the control ring, and the spring is arranged between the upper ring surface of the radial annular convex shoulder and the radial inner convex shoulder at the upper end of the control ring.

Furthermore, the valve seat comprises an upper valve seat and a lower valve seat, the lower valve seat is fixedly connected with the lower portion of the inner cavity wall of the valve body, the upper valve seat is fixed on the upper portion of the lower valve seat in a sealing mode, and an anti-rotation pin is arranged between the lower valve seat and the upper valve seat.

Furthermore, a lifting nut is arranged at the upper end of the valve rod, a lifting frame and a handle are arranged below the lifting nut, and the lifting frame, the lifting nut and the valve rod can be driven to move upwards by rotating the handle.

The utility model has the advantages that: the regulating ring adopts a self-operated automatic regulating device, when the medium pressure of the inlet channel rises to the set pressure, and the valve clack is opened, the automatic regulating device drives the regulating ring to move upwards, so that the valve clack and the recoil disc are subjected to larger recoil force and quickly rise, and when the medium pressure at the inlet channel falls, the automatic regulating device drives the regulating ring to move downwards, so that the valve clack and the recoil disc reduce the recoil force and quickly fall.

Drawings

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

Fig. 2 is a schematic structural diagram of another embodiment of the present invention.

Detailed Description

The self-adjusting spring-type safety valve shown in fig. 1 and 2 comprises: the valve comprises a valve body 1, a valve seat, a valve clack 12, a recoil disc 13, a guide sleeve 14, a valve cover 15, a valve rod 17 and a spring pressure setting device, wherein the valve body 1 is provided with an inlet channel 28 and a discharge channel 25, the valve seat is installed in the inlet channel 28 of the valve body 1, an adjusting ring 11 is arranged outside the sealing surface of the valve seat, the upper end of the guide sleeve 14 is fixedly installed between the valve body 1 and the valve cover 15, a guide hole at the lower end is in movable fit with a guide post at the upper part of the recoil disc 13, the valve clack 12 is installed at the lower end surface of the recoil disc 13, the spring pressure setting device comprises a prepressing spring 16, an upper spring seat 23, a lower spring seat 24 and an adjusting threaded sleeve 22 which are integrally installed between the valve cover 15 and the valve rod 17, the adjusting threaded sleeve 22 is installed at the upper part of the valve cover 15, the lower end of the valve rod 17 presses the upper spring seat 23, the lower end of the valve rod 17 presses the recoil disc 13, and the upper end of the valve rod sequentially penetrates through the lower spring seat 24, the prepressing spring 16, the upper spring seat 23 and the adjusting threaded sleeve 22, the inner cavity of the protective cover 20 extends into the upper end of the valve cover 15; the method is characterized in that: the adjusting ring 11 is provided with an automatic adjusting device, the automatic adjusting device is composed of a control ring 4 and a spring 3, the control ring 4 is installed on the outer circular surface of the valve seat, a pressure leading cavity 5 is arranged between the control ring 4 and the outer circular surface of the valve seat, the pressure leading cavity 5 is communicated with the valve seat inlet cavity through a pressure leading hole 6, medium pressure of the valve seat inlet cavity is led into the pressure leading cavity, the elasticity of the spring 3 is equal to the setting pressure of the spring pressure setting device, and the valve seat inlet cavity medium pressure pushes the control ring 4 to drive the adjusting ring 11 to move up and down through the spring 3. The pressure of the spring 3 can be designed to be slightly less than the setting pressure, when the pressure of the inlet cavity of the valve seat rises to be close to the discharge pressure, the pressure in the pressure leading cavity 5 compresses the spring 3, the control ring 4 is pushed to drive the adjusting ring 11 to move upwards, and the recoil disc 13 and the valve clack 12 are quickly opened to a full-open position to discharge a medium; when the medium is discharged to be lower than the setting pressure, the spring 3 returns, the control ring 4 drives the adjusting ring 11 to move downwards, the recoil disc 13 and the valve clack 12 are closed quickly, and the opening and closing pressure difference is small.

As shown in fig. 1, an adjusting ring 11 is installed on the outer circular surface of the upper portion of the valve seat through threads, a clamping groove 10 is arranged on the lower portion of the adjusting ring 11, a clamping head 9 extending into the clamping groove 10 is arranged at the upper end of the control ring 4, a spring 3 is installed between the lower end face of the control ring 4 and the radially outer step of the valve seat, a spiral groove 7 is arranged on the outer wall of the valve seat, and a convex block 26 which is movably matched with the spiral groove 7 is arranged on the inner wall of the control ring 4. When the medium pressure in the pressure guide cavity 5 exceeds the elastic force of the spring 3, the medium pressure pushes the control ring 4 to spirally rise in the spiral groove 7 of the valve seat, and the chuck 9 pushes the adjusting ring 11 to spirally rise in the clamping groove 10; on the contrary, when the pressure of the medium in the pressure guide cavity 5 is lower than the elastic force of the spring 3, the chuck 9 pushes the adjusting ring 11 to spirally descend in the clamping groove 10.

As shown in FIG. 2, an inner hole of the adjusting ring 11 is in dynamic sealing fit with an outer circular surface of the valve seat, a radial annular convex shoulder 30 is arranged at the lower end of the adjusting ring 11, an outer circular surface of the radial annular convex shoulder 30 is in dynamic sealing fit with an inner circular surface of the control ring 4, a lower annular surface is communicated with the pressure leading cavity 5, a limiting step is arranged between the lower annular surface of the radial annular convex shoulder 30 and the control ring 4 to limit the downward moving distance of the adjusting ring 11, the spring 3 is arranged between the upper annular surface of the radial annular convex shoulder 30 and a radial inner convex shoulder at the upper end of the control ring 4, and the radial inner convex shoulder is formed by mounting the spring gland 29 on the outer circular surface of the control ring 4 in a threaded manner, so that the spring 3 can be mounted conveniently. When the medium pressure in the pressure guide cavity 5 exceeds the elastic force of the spring 3, the medium pressure overcomes the elastic force of the spring 3 to push the adjusting ring 11 to move upwards; when the pressure of the medium in the pressure guide cavity 5 is lower than the elastic force of the spring 3, the spring 3 pushes the adjusting ring 11 to move downwards.

The valve seat comprises an upper valve seat 8 and a lower valve seat 2, the installation process of the automatic adjusting device is convenient, the control ring 4 is installed on the outer circular surface of the upper valve seat 8, the lower valve seat 2 is fixedly connected with the lower part of the inner cavity wall of the valve body 1, the upper valve seat 8 is fixed on the upper part of the lower valve seat 2 in a sealing mode, and an anti-rotating pin 27 is arranged between the lower valve seat 2 and the upper valve seat 8 to prevent the lower valve seat 2 and the upper valve seat 8 from rotating relatively.

A lifting nut 21 is arranged at the upper end of the valve rod 17, a lifting frame 19 and a handle 18 are arranged below the lifting nut 21, and the lifting frame 19, the lifting nut 21 and the valve rod 17 can be driven to move upwards by rotating the handle 18, so that manual emergency opening of a discharge medium is realized.

Claims

1. An automatically adjusting spring safety valve comprising: the valve comprises a valve body (1), a valve seat, a valve clack (12), a recoil disc (13), a guide sleeve (14), a valve cover (15), a valve rod (17) and a spring pressure setting device, wherein an adjusting ring (11) is arranged on the outer side of a sealing surface of the valve seat, the upper end of the guide sleeve (14) is fixedly arranged between the valve body (1) and the valve cover (15), a guide hole at the lower end of the guide sleeve is in movable fit with a guide post at the upper part of the recoil disc (13), the valve clack (12) is arranged on the lower end surface of the recoil disc (13), and the spring pressure setting device comprises a prepressing spring (16), an upper spring seat (23), a lower spring seat (24) and an adjusting screw sleeve (22) and is integrally arranged between the valve cover (15) and the valve rod (17); the method is characterized in that: the adjusting ring (11) is provided with an automatic adjusting device, the automatic adjusting device is composed of a control ring (4) and a spring (3), the control ring (4) is installed on the outer circular surface of the valve seat, a pressure leading cavity (5) is arranged between the control ring and the outer circular surface of the valve seat, the pressure leading cavity (5) is communicated with the inlet cavity of the valve seat through a pressure leading hole (6), the elastic force of the spring (3) is equal to the setting pressure of the spring pressure setting device, and the medium pressure of the inlet cavity of the valve seat pushes the control ring (4) to drive the adjusting ring (11) to move up and down through the spring (3).

2. The self-regulating spring-loaded safety valve of claim 1, wherein: adjusting ring (11) is installed at the outer disc in disk seat upper portion through the screw thread, is equipped with draw-in groove (10) in adjusting ring (11) lower part, and control ring (4) upper end is equipped with dop (9) that stretch into draw-in groove (10), and spring (3) are installed under control ring (4) between terminal surface and the disk seat radially outer step, and the disk seat outer wall is equipped with helicla flute (7), and control ring (4) inner wall is equipped with lug (26) with helicla flute (7) clearance fit.

3. The self-regulating spring-loaded safety valve of claim 1, wherein: an inner hole of the adjusting ring (11) is in dynamic sealing fit with an outer circular surface of a valve seat, a radial annular convex shoulder (30) is arranged at the lower end of the adjusting ring (11), an outer circular surface of the radial annular convex shoulder (30) is in dynamic sealing fit with an inner circular surface of the control ring (4), a lower ring surface is communicated with the pressure guide cavity (5), a limiting step is arranged between the lower ring surface of the radial annular convex shoulder (30) and the control ring (4), and the spring (3) is arranged between the upper ring surface of the radial annular convex shoulder (30) and a radial inner convex shoulder at the upper end of the control ring (4).

4. A self-regulating spring-loaded safety valve as claimed in claim 1, 2 or 3, wherein: the valve seat comprises an upper valve seat (8) and a lower valve seat (2), a control ring (4) is installed on the outer circular surface of the upper valve seat (8), the lower valve seat (2) is fixedly connected with the lower portion of the inner cavity wall of the valve body (1), the upper valve seat (8) is fixed on the upper portion of the lower valve seat (2) in a sealing mode, and an anti-rotation pin (27) is arranged between the lower valve seat (2) and the upper valve seat (8).

5. A self-regulating spring-loaded safety valve as claimed in claim 1, 2 or 3, wherein: a lifting nut (21) is arranged at the upper end of the valve rod (17), a lifting frame (19) and a handle (18) are arranged below the lifting nut (21), and the lifting frame (19), the lifting nut (21) and the valve rod (17) can be driven to move upwards by rotating the handle (18).