Isolation needle valve

Abstract

The utility model discloses an isolation needle valve, and relates to the field of isolation needle valve sealing, the isolation needle valve comprises a valve body, one side of the valve body is provided with an input hole, a sealing mechanism, first fixing cavities symmetrically formed in the middle end of the valve body, and the bottom of the axis of the first fixing cavity formed in the valve body is provided with an output hole and a fixing mechanism; comprising a handle fixedly connected to the upper end of a second threaded column, a groove is formed in the upper end of one side of the second threaded column, a round through hole is formed in one side of the middle end in the handle, and sealing and isolation are achieved through a sealing mechanism, combination of the second threaded column made of common materials and a hard alloy steel ball and contact between the steel ball and a valve body. The copper seal is removed, the conical surface of the nut is directly matched and sealed with the valve body, and the slotting structures on the two sides of the middle part of the valve body are utilized, so that the outer diameter material size of the valve body is saved, the material cost is directly reduced, the material use is reduced, the light weight of the valve body can be realized, and the weight of the whole equipment is reduced.

Description

Technical Field

[0001] The present application relates to the field of isolation needle valve sealing, and in particular to an isolation needle valve. Background Art

[0002] At present, isolation needle valves are widely used. Their fundamental application is mainly in the oil industry. In the instrument control system of the petrochemical industry, they are used to isolate or cut off the oil and gas circuits. They have high operating frequency, are easily damaged, and have a short service life. There are many forms of isolation needle valves on the market, and the demand for them in oil and gas instrument control systems is relatively large, so the market prospects are great.

[0003] In the prior art, when designing the spindle of the isolation needle valve, a spindle made of higher material is usually used, which increases the processing cost and also increases the requirements for the process. If a spindle made of lower material is selected, the spindle is very prone to wear, which shortens the service life of the spindle. When sealing between the nut and the valve body, a copper gasket is usually used for sealing. The processing cost of the copper gasket is relatively high, and due to the characteristics of the material itself, the copper gasket has relatively poor resistance to high temperature and high pressure. It is also prone to wear, aging and other problems, resulting in a relatively short service life. Most importantly, due to the limitations of the structure and manufacturing process of the copper gasket, its sealing performance may not be stable enough. Utility Model Content

[0004] In order to improve the sealing performance of the isolation needle valve, the present application provides an isolation needle valve.

[0005] The isolation needle valve provided in this application adopts the following technical solution:

[0006] An isolation needle valve comprises a valve body, one side of which is provided with an input hole;

[0007] The sealing mechanism comprises a fixed cavity 1 symmetrically opened at the middle end of the valve body, and an output hole is opened at the axial bottom of the fixed cavity 1 opened at the valve body;

[0008] The fixing mechanism comprises a handle fixedly connected to the upper end of the second threaded column, a groove is provided on the upper end of one side of the second threaded column, and a round through hole is provided on one side of the inner middle end of the handle.

[0009] Preferably, a thread groove 1 is provided inside the fixed cavity 1 of the valve body, a T-shaped end surface is provided at a lower end of the thread groove 1 provided inside the fixed cavity 1, and a spherical end surface is provided between the fixed cavity 1 and the output hole provided in the valve body.

[0010] Preferably, a threaded groove 1 provided inside the fixing cavity 1 is threadedly connected with a threaded column 1, a thread is provided at the middle end of the outer wall of the threaded column 1, and the upper and lower ends of the outer wall of the threaded column 1 are both smooth surfaces.

[0011] Preferably, a T-shaped cone block is fixedly connected to the bottom axis of the threaded column one, a hexagonal block is fixedly connected to the upper end of the thread provided on the threaded column one, and a dust cap is sleeved on the upper end of the hexagonal block to which the threaded column one is fixedly connected.

[0012] Preferably, an auxiliary cavity is opened at the lower end of the axis of the threaded column 1, a sealing ring is fixedly installed inside the auxiliary cavity opened by the threaded column 1, a retaining ring is fixedly installed inside the auxiliary cavity opened by the threaded column 1, and the retaining ring in the threaded column 1 is fixedly installed at the upper end of the sealing ring.

[0013] Preferably, a thread groove 2 is provided at the upper end of the auxiliary cavity opened by the threaded column 1, a threaded column 2 is threadedly connected in the thread groove 2 opened by the threaded column 1, the threaded column 2 is movable through the interior of the threaded column 1, a fixed cavity 2 is provided at the bottom end of the threaded column 2, and a ball is universally hinged in the fixed cavity 2 opened by the threaded column 2.

[0014] Preferably, the groove formed on the second threaded column is communicated with the round through hole formed on the handle, and a locking screw is fixedly installed on one side of the handle close to the round through hole.

[0015] In summary, the present application includes at least one of the following beneficial technical effects:

[0016] 1. Use the sealing mechanism, by using the combination of ordinary material threaded column and carbide steel ball, use the contact between the steel ball and the valve body to achieve sealing and isolation, remove the copper seal, and use the cone surface of the nut to directly cooperate with the valve body for sealing;

[0017] 2. With the help of the groove structure on both sides of the middle part of the valve body, the outer diameter material size of the valve body is saved, which directly reduces the material cost and reduces the material usage, so as to realize the lightweight of the valve body and reduce the weight of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the three-dimensional structure of this application;

[0019] Figure 2 It is a schematic cross-sectional view of the three-dimensional structure of the present application;

[0020] Figure 3 This is a left view of the three-dimensional structure of this application;

[0021] Figure 4 A schematic diagram of a threaded column of the present application;

[0022] Figure 5 This is a schematic diagram of the threaded column 2 of the present application;

[0023] Figure 6 This is a schematic cross-sectional view of the valve body of the present application.

[0024] Reference numerals: 1, valve body; 101, input hole;

[0025] 2. Sealing mechanism; 201. Fixed cavity 1; 202. Output hole; 203. Thread groove 1; 204. T-shaped end face; 205. Spherical end face; 206. Thread column 1; 207. T-shaped cone block; 208. Hexagonal block; 209. Dust cap; 210. Auxiliary cavity; 211. Sealing ring; 212. Retaining ring; 213. Thread groove 2; 214. Thread column 2; 215. Fixed cavity 2; 216. Ball;

[0026] 3. Fixing mechanism; 301. Handle; 302. Groove; 303. Round through hole; 304. Locking screw. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1 —6 Provide further details of this application.

[0028] The embodiment of the present application discloses an isolation needle valve.

[0029] Example 1

[0030] Reference Figure 1-6A kind of isolation needle valve comprises a valve body 1, an input hole 101 is provided on one side of the valve body 1, a sealing mechanism 2 comprises a fixed cavity 201 symmetrically provided at the middle end of the valve body 1, an output hole 202 is provided at the bottom of the axis of the fixed cavity 201 provided in the valve body 1, a thread groove 203 is provided inside the fixed cavity 201 provided in the valve body 1, a T-shaped end face 204 is provided at the lower end of the thread groove 203 provided inside the fixed cavity 201, a spherical end face 205 is provided between the fixed cavity 201 provided in the valve body 1 and the output hole 202, a threaded column 206 is threadedly connected to the thread groove 203 provided inside the fixed cavity 201, a thread is provided at the middle end of the outer wall of the threaded column 206, the upper and lower ends of the outer wall of the threaded column 206 are both smooth surfaces, a T-shaped cone block 207 is fixedly connected at the bottom axis of the threaded column 206, and the threaded upper end of the threaded column 206 is fixedly provided with a thread. A hexagonal block 208 is fixedly connected, and a dust cap 209 is sleeved on the upper end of the hexagonal block 208 fixedly connected to the threaded column 206. An auxiliary cavity 210 is opened at the lower end of the axis of the threaded column 206. A sealing ring 211 is fixedly installed inside the auxiliary cavity 210 opened by the threaded column 206. A retaining ring 212 is fixedly installed inside the auxiliary cavity 210 opened by the threaded column 206. The retaining ring 212 in the threaded column 206 is fixedly installed on the upper end of the sealing ring 211. A thread groove 213 is opened at the upper end of the auxiliary cavity 210 opened by the threaded column 206. A threaded column 214 is threadedly connected in the threaded groove 213 opened by the threaded column 206. The threaded column 214 movably passes through the interior of the threaded column 206. A fixed cavity 215 is opened at the bottom end of the threaded column 214. A ball 216 is universally hinged in the fixed cavity 215 opened by the threaded column 214.

[0031] The T-shaped cone block 207 at the bottom of the threaded column 206 is directly machined, the T-shaped end surface 204 inside the valve body 1 is machined, and the material of the ball 216 is hard alloy steel.

[0032] The thread groove 203 inside the fixed cavity 201 is connected with the thread on the surface of the thread column 206, so that the outer wall of the T-shaped cone block 207 fits with the T-shaped end face 204. When the T-shaped cone block 207 fits with the T-shaped end face 204, a tapered sealing surface is formed to prevent the liquid in the input hole 101 from flowing upward through the outer wall of the thread column 206. The output of the output hole 202 can be controlled by rotating the thread column 214. The thread column 206 is fitted with the spherical end face 205 to achieve isolation. The sealing effect is achieved by fixing the sealing ring 211 and the retaining ring 212 inside the threaded column 206, which can prevent the liquid flowing into the input hole 101 from flowing out through the gap between the threaded column 206 and the threaded column 214. The threaded column 206 can be easily rotated out of the valve body 1 by the hexagonal block 208. The dust cap 209 can effectively prevent dust, oil, moisture and other pollutants from contacting the surface of the parts, thereby maintaining the cleanliness of the parts and preventing the parts from being damaged or affecting the performance due to pollution.

[0033] Reference Figure 1 , 2 , 3, 5, an isolation needle valve, a fixing mechanism 3, including a handle 301 fixedly connected to the upper end of the threaded column 214, a groove 302 is provided on the upper end of one side of the threaded column 214, a round hole 303 is provided on the inner middle end of the handle 301, the groove 302 provided on the threaded column 214 is communicated with the round hole 303 provided on the handle 301, and a locking screw 304 is fixedly installed on the side of the handle 301 close to the round hole 303.

[0034] The handle 301 is provided to conveniently rotate the threaded column 214, and the locking screw 304 is provided to effectively prevent the valve components from loosening or vibrating during use due to factors such as medium flow, temperature changes or external vibrations.

[0035] The implementation principle of an isolation needle valve in the embodiment of the present application is as follows: the locking screw 304 is initially installed in the round through hole 303, and the operator manually threads the threaded column 206 into the threaded groove 203 inside the valve body 1. When the threaded column 206 is tightened, the side wall of the T-shaped cone block 207 fixedly connected to the bottom of the threaded column 206 fits with the T-shaped end face 204 to form a tapered sealing surface, and the sealing ring 211 and the retaining ring 212 are initially fixedly installed in the auxiliary cavity 210. Afterwards, the operator manually rotates the handle 301 to tighten the threaded column 206. 14 is threadedly connected inside the threaded column 1 206. When the threaded column 214 can no longer rotate, the surface of the ball 216 hinged on the universal joint at the bottom of the threaded column 214 fits with the spherical end face 205 to form an isolation sealing surface, and the sealing ring 211 and the retaining ring 212 seal the threaded column 214 and the threaded column 1 206. Then, the input hole 101 is fixedly connected to the input end of the external pipeline, and the output hole 202 is fixedly connected to the output end of the external pipeline. The output amount at the output hole 202 can be adjusted by rotating the threaded column 214.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An isolation needle valve, comprising a valve body (1), wherein one side of the valve body (1) is provided with an input hole (101), characterized in that: The sealing mechanism (2) comprises a fixed cavity (201) symmetrically arranged at the middle end of the valve body (1), wherein an output hole (202) is arranged at the bottom of the axis of the fixed cavity (201) arranged in the valve body (1); The fixing mechanism (3) comprises a handle (301) fixedly connected to the upper end of the second threaded column (214), a groove (302) is provided at the upper end of one side of the second threaded column (214), a round through hole (303) is provided at one side of the inner middle end of the handle (301), a thread groove (203) is provided inside the fixing cavity (201) of the valve body (1), a T-shaped end surface (204) is provided at the lower end of the thread groove (203) provided inside the fixing cavity (201), and a ball joint (204) is provided between the fixing cavity (201) of the valve body (1) and the output hole (202). The fixing cavity (201) has a threaded end surface (205), a threaded groove (203) provided inside the fixing cavity (201) is threadedly connected to a threaded column (206), a thread is provided at the middle end of the outer wall of the threaded column (206), the upper and lower ends of the outer wall of the threaded column (206) are both smooth surfaces, a T-shaped cone block (207) is fixedly connected at the bottom axis of the threaded column (206), a hexagonal block (208) is fixedly connected to the upper end of the thread provided on the threaded column (206), and a dust cap (209) is sleeved on the upper end of the hexagonal block (208) fixedly connected to the threaded column (206).

2. An isolation needle valve according to claim 1, characterized in that: An auxiliary cavity (210) is provided at the lower end of the axis of the threaded column (206), a sealing ring (211) is fixedly installed inside the auxiliary cavity (210) provided by the threaded column (206), a retaining ring (212) is fixedly installed inside the auxiliary cavity (210) provided by the threaded column (206), and the retaining ring (212) in the threaded column (206) is fixedly installed on the upper end of the sealing ring (211).

3. The isolation needle valve according to claim 1, characterized in that: The upper end of the auxiliary cavity (210) opened by the threaded column one (206) is provided with a threaded groove two (213), and the threaded groove two (213) opened by the threaded column one (206) is threadedly connected with a threaded column two (214), and the threaded column two (214) is movable through the interior of the threaded column one (206), and the bottom end of the threaded column two (214) is provided with a fixed cavity two (215), and the fixed cavity two (215) opened by the threaded column two (214) is universally hinged with a ball (216).

4. The isolation needle valve according to claim 1, characterized in that: The groove (302) formed on the second threaded column (214) is in communication with the round through hole (303) formed on the handle (301), and a locking screw (304) is fixedly mounted on one side of the handle (301) close to the round through hole (303).

Images