CN108953621B

CN108953621B - Instrument stop valve

Info

Publication number: CN108953621B
Application number: CN201810965651.2A
Authority: CN
Inventors: 耿成林; 陆超; 陈龙
Original assignee: JIANGSU HUATAI ELECTRIC POWER INSTRUMENT Co Ltd
Current assignee: JIANGSU HUATAI ELECTRIC POWER INSTRUMENT Co Ltd
Priority date: 2018-08-23
Filing date: 2018-08-23
Publication date: 2020-02-07
Anticipated expiration: 2038-08-23
Also published as: CN108953621A

Abstract

The invention discloses an instrument stop valve, and relates to the field of technical flow control parts. This instrument stop valve includes the valve body, locate the case in the valve body, the valve rod, a handle for connecting the valve gap of case and valve body and being used for controlling the case, the valve body is including the base that is used for installing case and intercommunication water pipe, and connect the disk seat that is used for installing the valve rod on the base, through connecting piece fixed connection between base and the disk seat, the connecting piece is located the terminal connecting portion of disk seat including being the spread groove that the taper located on the base and the shape corresponds the spread groove, threaded connection between spread groove and the connecting portion, be equipped with the sealing ring of hugging closely the connecting portion lateral wall along with connecting portion deepen the spread groove on the lateral wall of spread groove, the sealing ring includes the semi-ring of two relative settings, divide into two parts erection joint with the valve body, technological requirement when having reduced the.

Description

Instrument stop valve

Technical Field

The invention relates to the technical field of instrument stop valves, in particular to an instrument stop valve.

Background

The instrument stop valve, i.e. the needle valve of the instrument, is an important component in the instrument measurement pipeline system, mainly comprises a stop valve and a ball valve, and is mainly used for opening or cutting off a pipeline passage. The outer surface of the valve body of the needle valve of the instrument is also corroded by atmosphere, and the general steel materials are protected by painting.

The needle valve of the instrument is an important component of a measuring pipeline system of the instrument, mainly comprises a stop valve and a ball valve, and has the function of opening or cutting off a pipeline passage. The cutting ferrule type instrument valve has the advantages of convenient assembly and disassembly, tight connection, fire prevention, explosion prevention, high pressure resistance, good sealing performance and the like, and is a valve with an advanced connection mode in power stations, oil refining, chemical devices and instrument measuring pipelines.

The needle-shaped stop valve has good sealing performance and long service life, and can be continuously used only by replacing easily damaged parts even if a sealing surface is damaged. The valve core of the needle valve is a sharp cone which is inserted into the valve seat like a needle, so that the name of the needle valve is.

At present, chinese patent publication No. CN108374914A discloses a two-way check valve, which includes a check valve part and an instrument check valve part, wherein the two-way check valve has three connection ends, i.e., an inlet end, a middle end and an outlet end, and is connected with the instrument check valve seats of the inlet end and the outlet end through check valve flaps;

the two-way check valve can realize that the middle end is always communicated with one end with higher pressure at the inlet end or the outlet end of the valve when the instrument stop valves at the two ends are kept open; and the other two ends can be forced to be communicated by closing the instrument stop valve at any end;

the two-way stop valve has the functions of a stop valve and a check valve, particularly has the function of keeping the middle cavity of the gate valve communicated with the higher pressure end of the inlet or the outlet of the gate valve all the time when used as a bypass valve of the gate valve, has the function of avoiding abnormal boosting of the middle cavity of the gate valve, and provides guarantee for safe operation of the valve.

Disclosure of Invention

Aiming at the technical problems, the invention overcomes the defects of the prior art and provides an instrument stop valve.

In order to solve the technical problem, the invention provides an instrument stop valve.

The technical effects are as follows: the valve body is divided into two parts for mounting and connecting, so that the process requirement during valve body manufacturing is reduced, the mounting difficulty of the valve rod and the valve core is reduced, and the overall mounting efficiency is improved.

The technical scheme of the invention is further defined as follows: the utility model provides an instrument stop valve, which comprises a valve body, locate the case in the valve body, the valve rod, a handle for connecting the valve gap of case and valve body and being used for control valve element, the valve body is including the base that is used for installing case and intercommunication water pipe, and connect the disk seat that is used for installing the valve rod on the base, through connecting piece fixed connection between base and the disk seat, the connecting piece is located the terminal connecting portion of disk seat including being the spread groove that the taper was located on the base and the shape corresponds the spread groove, threaded connection between spread groove and the connecting portion, be equipped with the sealing ring of hugging closely the connecting portion lateral wall along with connecting portion deepen the spread groove.

Furthermore, a linkage rod is arranged on the sealing ring, a movable groove is formed in the side wall of the connecting groove, and the middle position of the linkage rod is hinged in the movable groove.

The instrument stop valve, gangbar one end and sealing ring hinge, the other end articulates there is the adjusting block, adjusting block shape and disk seat lower end face laminating, the semi-ring is made by rubber materials and slides and connects in the movable groove.

The instrument stop valve is characterized in that a hinged shaft is arranged in the middle of the linkage rod, the hinged shaft is rotatably connected in the movable groove, and the contact surface of the movable groove and the sealing ring is a cambered surface.

The instrument stop valve, the both sides that lie in the sealing ring in the spread groove are equipped with respectively and are used for increasing sealed the pad and the lantern ring of leakproofness.

The instrument stop valve, be equipped with the valve groove in the base, still be equipped with logical groove in the disk seat, be equipped with on the valve rod and be used for blocking the sealing member that leads to groove and valve groove, the sealing member is including locating the filler at bulge loop top, packs and fills between valve rod and disk seat inner wall.

The instrument stop valve is characterized in that a gland used for compressing packing is further arranged in the through groove, the gland sleeve is arranged on the valve rod and fixed with the valve seat through a lock nut, the handle is fixedly connected to the tail end of the top of the valve rod, and the gland is connected with the lock nut and the valve seat through threads.

The invention has the beneficial effects that:

(1) in the invention, during installation, the valve rod and the valve core are installed in the valve seat, the valve seat is correspondingly installed on the base, and the outer surface of the valve seat is obliquely arranged, so that the valve seat pushes the adjusting block in the installation process, the linkage rod is driven to rotate around a middle hinge point, the semi-ring is pulled to be attached to the valve seat, and the integral sealing effect is improved;

(2) in the invention, the sealing ring comprises two half rings, when the valve seat is separated from the base, the half rings are recovered, so that the disassembly of the valve body is not influenced, and when the valve seat is installed, the half rings supported by the rubber are abutted against the valve seat, so that the friction can be improved, and the connection firmness is increased;

(3) in the invention, the contact surface of the movable groove and the sealing ring is a cambered surface, and when the linkage rod rotates, the rotation of the semi-ring is not influenced, so that the smooth rotation is ensured;

(4) in the invention, the sealing ring and the filler form two sealing barriers between the valve groove and the through groove, the sealing effect between the through groove and the valve groove is optimized, the integral sealing degree is improved, and the water leakage between the valve groove and the through groove is avoided.

Drawings

FIG. 1 is a schematic structural view of example 1;

fig. 2 is a schematic view for showing a connector in embodiment 1.

Wherein: 1. a valve body; 11. a valve spool; 12. a through groove; 13. a base; 14. a valve seat; 2. a valve core; 3. a valve stem; 31. a handle; 4. a valve cover; 5. a seal member; 51. a limiting ring; 52. a gasket; 53. a collar; 6. a filler; 7. a gland; 8. locking a nut; 9. a connecting member; 91. connecting grooves; 92. a connecting portion; 93. a seal ring; 94. a half ring; 95. a linkage rod; 96. a movable groove; 97. an adjusting block; 98. and (4) hinging the shaft.

Detailed Description

The instrument stop valve that this embodiment provided, the structure is as shown in fig. 1 and fig. 2, including valve body 1, 1 top of valve body is valve gap 4, is equipped with case 2 and valve rod 3 in the valve body 1, and valve gap 4 is used for connecting case 2 and valve body 1, and 3 tops of valve rod are fixed with handle 31 for control valve rod 3 is rotatory and case 2 goes up and down, threaded connection between valve rod 3 and the valve body 1.

As shown in fig. 1 and 2, the valve body 1 includes a base 13 for mounting the valve core 2 and the communicating water pipe, and a valve seat 14 connected to the base 13 for mounting the valve rod 3, the base 13 and the valve seat 14 are fixedly connected through a connecting piece 9, the connecting piece 9 includes a connecting groove 91 arranged on the base 13 in a taper shape and a connecting portion 92 arranged at the end of the valve seat 14 corresponding to the connecting groove 91 in shape, the connecting groove 91 is in threaded connection with the connecting portion 92, a sealing ring 93 tightly attached to the side wall of the connecting portion 92 as the connecting portion 92 penetrates into the connecting groove 91 is arranged on the side wall of the connecting groove 91, and the sealing ring 93.

As shown in fig. 1 and 2, a linkage rod 95 is arranged on the sealing ring 93, a movable groove 96 is formed on the side wall of the connecting groove 91, and the middle position of the linkage rod 95 is hinged in the movable groove 96. One end of the linkage rod 95 is hinged with the sealing ring 93, the other end of the linkage rod is hinged with an adjusting block 97, the shape of the adjusting block 97 is attached to the lower end face of the valve seat 14, and the half ring 94 is made of rubber materials and connected in the movable groove 96 in a sliding mode. The middle of the linkage rod 95 is provided with a hinge shaft 98, the hinge shaft 98 is rotatably connected in the movable groove 96, and the contact surface of the movable groove 96 and the sealing ring 93 is a cambered surface.

As shown in fig. 1 and 2, a sealing gasket 52 and a collar 53 for increasing sealing performance are respectively provided in the connecting groove 91 at both sides of the sealing ring 93. Be equipped with valve slot 11 in the base 13, still be equipped with logical groove 12 in the disk seat 14, be equipped with on the valve rod 3 and be used for blocking logical groove 12 and valve slot 11's sealing member 5, sealing member 5 is including locating the packing 6 at bulge loop top, and packing 6 is filled between valve rod 3 and disk seat 14 inner wall.

As shown in fig. 1 and 2, a gland 7 for compressing the packing 6 is further arranged in the through groove 12, the gland 7 is sleeved on the valve rod 3 and fixed with the valve seat 14 through a lock nut 8, the handle 31 is fixedly connected to the tail end of the top of the valve rod 3, and the gland 7 is in threaded connection with the lock nut 8 and the valve seat 14.

During installation, the valve rod 3 and the valve core 2 are installed in the valve seat 14, the valve seat 14 is correspondingly installed on the base 13, and due to the fact that the outer surface of the valve seat 14 is obliquely arranged, the valve seat 14 pushes the adjusting block 97 in the installation process, the linkage rod 95 is driven to rotate around a middle hinge point, the semi-ring 94 is pulled to be attached to the valve seat 14, and the overall sealing effect is improved. When installed, the rubber-backed half rings 94 abut the valve seat 14 and also enhance friction and thus secure attachment.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.

Claims

1. The utility model provides an instrument stop valve, includes valve body (1), locates case (2), valve rod (3) in valve body (1) for valve gap (4) of connecting case (2) and valve body (1) and be used for handle (31) of control case (2), its characterized in that: valve body (1) is including base (13) that is used for installing case (2) and intercommunication water pipe, and connect and be used for installing disk seat (14) of valve rod (3) on base (13), through connecting piece (9) fixed connection between base (13) and disk seat (14), connecting piece (9) are located disk seat (14) terminal connecting portion (92) including being spread groove (91) and shape correspondence spread groove (91) on base (13) that the taper is located, threaded connection between spread groove (91) and connecting portion (92), be equipped with on the lateral wall of spread groove (91) and follow connecting portion (92) and go deep into spread groove (91) and hug closely sealing ring (93) of connecting portion (92) lateral wall, sealing ring (93) include two semi-rings (94) of relative setting.

2. The meter shut-off valve of claim 1, wherein: the sealing ring (93) is provided with a linkage rod (95), the side wall of the connecting groove (91) is provided with a movable groove (96), and the middle position of the linkage rod (95) is hinged in the movable groove (96).

3. The meter shut-off valve of claim 2, wherein: one end of the linkage rod (95) is hinged with the sealing ring (93), the other end of the linkage rod is hinged with an adjusting block (97), the shape of the adjusting block (97) is attached to the lower end face of the valve seat (14), and the half ring (94) is made of rubber materials and connected in the movable groove (96) in a sliding mode.

4. The meter shut-off valve of claim 3, wherein: the middle of the linkage rod (95) is provided with a hinged shaft (98), the hinged shaft (98) is rotatably connected in the movable groove (96), and the contact surface of the movable groove (96) and the sealing ring (93) is an arc surface.

5. The meter shut-off valve of claim 1, wherein: the valve seat is characterized in that a valve groove (11) is formed in the base (13), a through groove (12) is further formed in the valve seat (14), a sealing element (5) used for blocking the through groove (12) and the valve groove (11) is arranged on the valve rod (3), the sealing element (5) comprises a packing (6) arranged at the top of the convex ring, and the packing (6) is filled between the valve rod (3) and the inner wall of the valve seat (14).

6. The meter shut-off valve of claim 5, wherein: the sealing device is characterized in that a gland (7) used for compressing the packing (6) is further arranged in the through groove (12), the gland (7) is sleeved on the valve rod (3) and fixed with the valve seat (14) through a lock nut (8), the handle (31) is fixedly connected to the tail end of the top of the valve rod (3), and the gland (7) is connected with the lock nut (8) and the valve seat (14) through threads.