CN210800074U

CN210800074U - High-temperature high-pressure needle valve

Info

Publication number: CN210800074U
Application number: CN201921455159.7U
Authority: CN
Inventors: 王宗臣
Original assignee: Jiavalve Technology Xianghe Co Ltd
Current assignee: Jiavalve Technology Xianghe Co Ltd
Priority date: 2019-09-03
Filing date: 2019-09-03
Publication date: 2020-06-19
Anticipated expiration: 2029-09-03

Abstract

The utility model provides a high temperature high pressure needle type valve, this technical scheme have carried out the novelty to its inner structure on the basis of needle type valve conventional structure and have improved. Specifically, the inlet channel and the outlet channel which are perpendicular to each other are arranged in the valve body of the utility model and are separated by the conical valve core, and the valve core can adjust the opening degree through the rotation action under the driving of the valve rod; on this basis, the utility model discloses set up the swivel nut in the access passage, set up the cylinder portion that has the external screw thread at the case lower extreme, utilized the cooperation relation of cylinder portion and swivel nut, made the case last the gripping that obtains the swivel nut at the lift in-process to keep its stability from the case lower extreme, avoided because of the lower extreme dangles and lead to case self vibrations great technical problem when receiving high-pressure fluid to strike. Use the utility model discloses, can effectively improve the stability of case in high-pressure fluid environment, have good result of use.

Description

High-temperature high-pressure needle valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to high temperature high pressure needle type valve.

Background

Any valve is used for cutting off fluid, and can be divided into a stop valve, a gate valve, a plug valve, a ball valve, a butterfly valve, a needle valve and the like according to different valve cores. The valve core of the needle valve is a sharp cone which is inserted into the valve body like a needle, so that the needle valve is named. The needle valve is a valve which can be accurately adjusted, and has wide application, such as cutting distance for flame cutting, and a knob for adjusting flame temperature is the needle valve. The needle valve generally adopts a threaded connection, namely, the insertion depth of a valve rod is adjusted by screwing a handle, so that the gap between a conical valve core and a valve body is adjusted, and the flow is accurately controlled. Needle valves are more tight than other types of valves and are generally used for sealing gas or liquid media with a smaller flow rate.

In the prior art, the valve core is fixedly connected with the bottom end of the valve rod, only the upper end of the valve rod is connected with the valve body or the valve cover, and the lower end of the valve rod is in a suspension state, so when the fluid pressure is overhigh, fluid is sprayed out from an annular gap between the conical valve core and the valve body at a high speed, the valve core and the valve rod are easy to vibrate, and the vibration has certain influence on the service life of the needle valve if not controlled.

Disclosure of Invention

The utility model discloses aim at providing a high temperature high pressure needle type valve to prior art's technical defect to solve prior art, when conventional needle type valve was in the open mode in high-pressure fluid, the great technical problem of fluid impact vibrations to the case.

In order to realize the technical purpose, the utility model adopts the following technical scheme:

a high-temperature and high-pressure needle valve comprises a valve body, a valve cover, an inlet channel, a gland nut, packing, a backing ring, a packing gland, a handle, a valve rod, a valve core, a cylindrical part, a screw sleeve, a through hole and a discharge channel, wherein the upper end of the valve body is fixedly connected with the valve cover, the valve body and the valve cover are provided with a channel which longitudinally penetrates through the valve cover, the valve rod is inserted in the channel, the packing is arranged between the valve rod and the inner wall of the channel, the upper end and the lower end of the packing are respectively provided with the packing gland and the backing ring, the upper end of the packing gland is screwed with the gland nut, the upper end of the valve rod is fixedly connected with the handle, the lower end of the valve rod is fixedly connected with the valve core, the lower end and the side end of the valve body are respectively provided with the inlet channel and the discharge channel, the inlet channel and the discharge, the outer wall of the cylindrical part is provided with external threads, the inner wall of the inlet channel is fixedly connected with a threaded sleeve, the cylindrical part is connected in the threaded sleeve in a threaded mode, and the threaded sleeve is provided with a plurality of through holes which penetrate through the threaded sleeve.

Preferably, the valve further comprises a bolt which is transversely screwed at the joint of the valve body and the valve cover.

Preferably, the valve rod is screwed to the valve cover, and the screwing direction of the screw connection between the valve rod and the valve cover is the same as the screwing direction of the screw connection between the cylindrical portion and the screw sleeve.

Preferably, the axes of the inlet channel and the outlet channel are perpendicular to each other, and the inner diameter of the inlet channel is equal to the inner diameter of the outlet channel.

Preferably, the thread insert and the valve body are integrally formed.

In the technical scheme, the valve body is a basic structure of the valve, a passage is arranged in the valve body for fluid circulation, and a conical valve core is arranged in the valve body for realizing the on-off function; the valve cover is used for sealing the upper end of the valve body, and the valve cover and the valve body enclose an inner space together; the inlet channel is used for allowing fluid to enter, the outlet channel is used for allowing fluid to flow out, and the inlet channel and the outlet channel are spaced by the valve core, so that the valve core is used for controlling the on-off of the fluid; the gland nut and the packing gland are used for sealing the packing from the upper end; the filler is used for playing a role of mechanical sealing; the backing ring is used for sealing the lower end of the filler; the handle is used for screwing the valve rod; the valve rod is connected to the valve cover in a threaded manner, the cylindrical part is connected to the threaded sleeve in a threaded manner, and the thread direction and the thread pitch of the two threaded actions are the same, so that the valve rod synchronously moves up and down on the valve cover and the cylindrical part in the threaded sleeve along with the screwing of the handle, and the lower end of the valve core is continuously kept stable due to the matching between the cylindrical part and the threaded sleeve in the process of adjusting the opening degree of the valve core, so that the vibration impact is relieved; the valve rod is used for establishing a connection relationship between the handle and the valve core, so that the valve core can be controlled to lift by screwing the handle to adjust the opening degree; the outer edge of the upper part of the valve core is in a conical shape and is matched with the upper port of the inlet channel, so that the on-off and opening degree adjusting functions are realized; the cylindrical part is used for being matched with the threaded sleeve and has a stabilizing effect on the valve core from the lower end; the through hole on the through hole thread insert is used for allowing fluid to pass through. In addition, the joint of the valve body and the valve cover can be fixed by utilizing a transverse bolt in a screwed mode, and therefore the tightness of the connecting structure between the valve body and the valve cover is further enhanced.

Drawings

FIG. 1 is a schematic view of the structure of the present invention in a partial longitudinal section;

fig. 2 is a top view of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 1 at A;

fig. 4 is a top view of the middle screw sleeve of the present invention;

in the figure:

1. valve body 2, valve cover 3, inlet channel 4 and gland nut

5. Bolt 6, packing 7, backing ring 8, packing gland

9. Handle 10, valve rod 11, valve core 12 and column part

13. Screw sleeve 14, through hole 15 and discharge channel.

Detailed Description

The following will describe in detail specific embodiments of the present invention. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

Example 1

A high-temperature and high-pressure needle valve comprises a valve body 1, a valve cover 2, an inlet channel 3, a gland nut 4, packing 6, a backing ring 7, a gland 8, a handle 9, a valve rod 10, a valve core 11, a cylindrical part 12, a screw sleeve 13, a through hole 14 and a discharge channel 15, wherein the upper end of the valve body 1 is fixedly connected with the valve cover 2, the valve body 1 and the valve cover 2 are provided with a longitudinally penetrating channel, the valve rod 10 is inserted in the channel, the packing 6 is arranged between the valve rod 10 and the inner wall of the channel, the upper end and the lower end of the packing 6 are respectively provided with the gland 8 and the backing ring 7, the upper end of the gland 8 is connected with the gland nut 4, the upper end of the valve rod 10 is fixedly connected with a handle 9, the lower end of the valve rod 10 is fixedly connected with the valve core 11, the lower end and the side end of the valve body 1 are respectively provided with the inlet channel 3 and the discharge channel 15, and the inlet channel 3 and the, the lower end of the valve core 11 is positioned in the inlet channel 3, the lower end of the valve core 11 is provided with a cylindrical part 12, the outer wall of the cylindrical part 12 is provided with external threads, the inner wall of the inlet channel 3 is fixedly connected with a threaded sleeve 13, the cylindrical part 12 is connected in the threaded sleeve 13 in a threaded manner, and the threaded sleeve 13 is provided with a plurality of through holes 14.

The device has the following structural characteristics: the valve body 1 is a basic structure of the valve, a passage is arranged in the valve body 1 for fluid circulation, and a conical valve core 11 is arranged in the valve body 1 for realizing the on-off function; the valve cover 2 is used for sealing the upper end of the valve body 1, and the valve cover 2 and the valve body 1 jointly enclose an inner space; the inlet channel 3 is used for the fluid to enter, the outlet channel 15 is used for the fluid to flow out, and the inlet channel and the outlet channel are separated by the valve core 11, so that the valve core 11 is used for controlling the on-off of the fluid; the gland nut 4 and the packing gland 8 are used for sealing the packing 6 from the upper end; the filler 6 is used for playing a role of mechanical sealing; the backing ring 7 is used for sealing the lower end of the filler 6; the handle 9 is used for screwing the valve rod 10; the valve rod 10 is connected on the valve cover 2 in a threaded manner, the cylindrical part 12 is connected in the threaded sleeve 13 in a threaded manner, and the thread directions and thread pitches of the two threaded actions are the same, so that the valve rod 10 synchronously moves up and down on the valve cover 2 and the cylindrical part 12 in the threaded sleeve 13 along with the screwing of the grip 9, and the lower end of the valve core 11 is continuously kept stable due to the matching between the cylindrical part 12 and the threaded sleeve 13 in the process of adjusting the opening degree of the valve core 11, so that the vibration impact is relieved; the valve rod 10 is used for establishing a connection relationship between the handle 9 and the valve core 11, so that the valve core 11 can be controlled to ascend and descend by screwing the handle 9 to adjust the opening degree; the outer edge of the upper part of the valve core 11 is conical and is matched with the upper port of the inlet channel 3, so that the on-off and opening degree adjusting functions are realized; the cylindrical part 12 is used for being matched with the threaded sleeve 13 and has a stabilizing effect on the valve core 11 from the lower end; the through hole 14 of the screw sleeve 13 is used for fluid to pass through.

Example 2

A high-temperature and high-pressure needle valve comprises a valve body 1, a valve cover 2, an inlet channel 3, a gland nut 4, packing 6, a backing ring 7, a gland 8, a handle 9, a valve rod 10, a valve core 11, a cylindrical part 12, a screw sleeve 13, a through hole 14 and a discharge channel 15, wherein the upper end of the valve body 1 is fixedly connected with the valve cover 2, the valve body 1 and the valve cover 2 are provided with a longitudinally penetrating channel, the valve rod 10 is inserted in the channel, the packing 6 is arranged between the valve rod 10 and the inner wall of the channel, the upper end and the lower end of the packing 6 are respectively provided with the gland 8 and the backing ring 7, the upper end of the gland 8 is connected with the gland nut 4, the upper end of the valve rod 10 is fixedly connected with a handle 9, the lower end of the valve rod 10 is fixedly connected with the valve core 11, the lower end and the side end of the valve body 1 are respectively provided with the inlet channel 3 and the discharge channel 15, and the inlet channel 3 and the, the lower end of the valve core 11 is positioned in the inlet channel 3, the lower end of the valve core 11 is provided with a cylindrical part 12, the outer wall of the cylindrical part 12 is provided with external threads, the inner wall of the inlet channel 3 is fixedly connected with a threaded sleeve 13, the cylindrical part 12 is connected in the threaded sleeve 13 in a threaded manner, and the threaded sleeve 13 is provided with a plurality of through holes 14. The valve further comprises a bolt 5, and the bolt 5 is transversely threaded at the joint of the valve body 1 and the valve cover 2. The valve rod 10 is connected with the valve cover 2 in a threaded mode, and the threaded direction of the threaded connection between the valve rod 10 and the valve cover 2 is the same as the threaded direction of the threaded connection between the cylindrical part 12 and the threaded sleeve 13. The axes of the inlet channel 3 and the outlet channel 15 are perpendicular to each other, and the inner diameter of the inlet channel 3 is equal to the inner diameter of the outlet channel 15. The screw sleeve 13 and the valve body 1 are integrally formed.

The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the scope of the present invention should be included in the protection scope of the present invention.

Claims

1. The high-temperature and high-pressure needle valve is characterized by comprising a valve body (1), a valve cover (2), an inlet channel (3), a gland nut (4), packing (6), a backing ring (7), a packing gland (8), a handle (9), a valve rod (10), a valve core (11), a cylindrical part (12), a screw sleeve (13), a through hole (14) and a discharge channel (15), wherein the upper end of the valve body (1) is fixedly connected with the valve cover (2), a longitudinal through channel is arranged in the valve body (1) and the valve cover (2), the valve rod (10) is inserted in the channel, the packing (6) is arranged between the valve rod (10) and the inner wall of the channel, the upper end and the lower end of the packing (6) are respectively provided with the packing gland (8) and the backing ring (7), the upper end of the packing gland (8) is connected with the gland nut (4), and the upper end of the valve rod (10) is fixedly connected with, the valve comprises a valve rod (10), a valve core (11) is fixedly connected to the lower end of the valve rod (10), an inlet channel (3) and an outlet channel (15) are respectively arranged at the lower end and the side end of the valve body (1), the inlet channel (3) and the outlet channel (15) are separated by the valve core (11), the lower end of the valve core (11) is positioned in the inlet channel (3), a cylindrical portion (12) is arranged at the lower end of the valve core (11), external threads are arranged on the outer wall of the cylindrical portion (12), a threaded sleeve (13) is fixedly connected to the inner wall of the inlet channel (3), the cylindrical portion (12) is connected to the threaded sleeve (13), and a plurality of through holes (14) are formed in the threaded sleeve (13).

2. A high temperature and high pressure needle valve as claimed in claim 1, further comprising a bolt (5), the bolt (5) being threaded transversely at the junction of the valve body (1) and the bonnet (2).

3. A hot and high pressure needle valve according to claim 1, wherein the valve stem (10) is threaded to the valve cover (2), and the thread direction of the thread connection between the valve stem (10) and the valve cover (2) is the same as the thread direction of the thread connection between the cylindrical portion (12) and the screw sleeve (13).

4. A high temperature and high pressure needle valve as claimed in claim 1, wherein the inlet passage (3) and the outlet passage (15) have axes perpendicular to each other, and the inlet passage (3) has an inner diameter equal to the inner diameter of the outlet passage (15).

5. A high temperature and high pressure needle valve as claimed in claim 1, wherein the threaded sleeve (13) is integrally formed with the valve body (1).