A long-life needle valve suitable for ultra-high pressure working conditions

Abstract

The utility model discloses a long-life needle valve adapted to ultra-high pressure working conditions, comprising a needle valve body, a reinforcement frame evenly fixedly connected to the outer side of the needle valve body, a reinforcement rod evenly fixedly connected to the outer side of the needle valve body, the reinforcement rod and the reinforcement frame fixedly connected, an input hole groove opened at one end of the needle valve body, an output hole groove opened at the other end of the needle valve body, a valve core connection groove opened at the middle of the top of the needle valve body, and an adjustment support portion fixedly installed at the top of the needle valve body. The utility model reinforces the needle valve body by the reinforcement frame and the reinforcement rod, strengthens its internal pressure resistance, and realizes continuous pressure compensation for the sealing gasket by introducing a pressure compensation spring and a metal gasket, thereby ensuring that the sealing gasket always keeps a tight fit and effectively prevents fluid leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of needle valves, in particular to a long-life needle valve suitable for ultra-high pressure working conditions. Background Art

[0002] The needle valve is a precisely adjusted valve with a sharp conical valve core that inserts into the valve seat like a needle, hence the name. The needle valve is particularly suitable for use in scenarios that require precise flow control, such as laboratories and chemical process control.

[0003] The valve body of the needle valve is prone to rupture under high-pressure environment, and the sealing gasket is prone to valve leakage when it wears and becomes thinner. Therefore, a long-life needle valve that can adapt to ultra-high pressure conditions is urgently needed to solve the above problems. Utility Model Content

[0004] The utility model aims to provide a long-life needle valve suitable for ultra-high pressure working conditions, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a long-life needle valve suitable for ultra-high pressure working conditions, comprising a needle valve body, a reinforcement frame is evenly fixedly connected to the outer side of the needle valve body, a reinforcement rod is evenly fixedly connected to the outer side of the needle valve body, the reinforcement rod and the reinforcement frame are fixedly connected, an input hole groove is provided at one end of the needle valve body, an output hole groove is provided at the other end of the needle valve body, a valve core connecting groove is provided in the middle of the top end of the needle valve body, the input hole groove and the output hole groove are connected through the valve core connecting groove, and an adjustment support portion is fixedly installed at the top end of the needle valve body.

[0006] Preferably, the internal thread of the valve core connecting groove is connected with an external thread limit nut, a valve core connecting rod is movably inserted into the inner side of the external thread limit nut, the bottom end of the valve core connecting rod is fixedly connected with a conical valve core, and an adjusting gasket is provided at the top of the external thread limit nut, and a plurality of sealing gaskets are provided at the top of the adjusting gasket, a metal gasket is provided at the top of the sealing gasket located at the top, and a pressure compensation spring is provided at the top of the metal gasket.

[0007] Preferably, a gasket pressure cover is fixedly installed on the top end of the needle valve body, an embedded pressure cover is fixedly connected to the bottom end of the gasket pressure cover, the embedded pressure cover is movably inserted into the inner side of the valve core connecting groove, a valve adjusting rod is threadedly connected to the middle part of the adjustment support part, and an adjusting rudder is fixedly connected to the top end of the valve adjusting rod.

[0008] Preferably, the valve core connecting rod is movably inserted into the inner sides of the external thread limit nut, the adjusting gasket, the sealing gasket and the metal gasket respectively.

[0009] Preferably, the top end of the external thread limit nut is symmetrically provided with notches, and the bottom end of the conical valve core is symmetrically fixedly connected with a clamping block matching the notch at the top end of the external thread limit nut.

[0010] Preferably, the bottom end of the valve regulating rod is in contact with the top end of the external thread limiting nut.

[0011] Preferably, the top end of the pressure compensation spring is in close contact with the bottom end of the embedded pressure cover, and the bottom end of the pressure compensation spring is in close contact with the top end of the metal gasket.

[0012] Preferably, the gasket gland is located on the inner side of the adjustment support portion, and the valve adjustment rod is movably inserted into the inner side of the gasket gland.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The utility model reinforces the needle valve body by means of a reinforcement frame and a reinforcement rod, thereby enhancing its internal pressure resistance, and realizes continuous pressure compensation for the sealing gasket by introducing a pressure compensation spring and a metal gasket. Even if the sealing gasket becomes thinner due to wear after long-term use, the pressure compensation spring can exert pressure on the metal gasket through its stored elastic force, thereby ensuring that the sealing gasket always maintains a tight fit, thereby effectively preventing fluid leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the main three-dimensional structure of the utility model;

[0016] Figure 2 It is a schematic diagram of the main body cutaway structure in the utility model;

[0017] Figure 3 It is a schematic diagram of the main body cut-and-split structure of the present utility model.

[0018] In the figure: 1-needle valve body, 2-reinforcement frame, 3-reinforcement rod, 4-gasket pressure cover, 5-adjustment support part, 6-adjustment rudder, 7-valve adjustment rod, 8-input hole groove, 9-valve core connecting groove, 10-output hole groove, 11-valve core connecting rod, 12-external thread limit nut, 13-conical valve core, 14-adjustment gasket, 15-sealing gasket, 16-metal gasket, 17-pressure compensation spring, 18-embedded pressure cover. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-3 The utility model provides an embodiment: a long-life needle valve suitable for ultra-high pressure working conditions, including a needle valve body 1, a reinforcement frame 2 is evenly fixedly connected to the outer side of the needle valve body 1, a reinforcement rod 3 is evenly fixedly connected to the outer side of the needle valve body 1, the reinforcement rod 3 and the reinforcement frame 2 are fixedly connected, the needle valve body 1 is reinforced by the reinforcement frame 2 and the reinforcement rod 3, and the probability of cracking of the needle valve body 1 is reduced, an input hole groove 8 is opened at one end of the needle valve body 1, an output hole groove 10 is opened at the other end of the needle valve body 1, a valve core connecting groove 9 is opened in the middle of the top end of the needle valve body 1, the input hole groove 8 and the output hole groove 10 are connected through the valve core connecting groove 9, and an adjustment support part 5 is fixedly installed at the top end of the needle valve body 1.

[0021] The internal thread of the valve core connecting groove 9 is connected with an external thread limit nut 12, the bottom end of the valve adjusting rod 7 is in contact with the top end of the external thread limit nut 12, the inner side of the external thread limit nut 12 is movably inserted with a valve core connecting rod 11, the bottom end of the valve core connecting rod 11 is fixedly connected with a conical valve core 13, the top end of the external thread limit nut 12 is provided with an adjusting gasket 14, the top end of the adjusting gasket 14 is provided with a plurality of sealing gaskets 15, the plurality of sealing gaskets 15 increase the sealing performance and the service life of the valve, the top end of the sealing gasket 15 located at the top is provided with a metal gasket 16, the top end of the metal gasket 16 is provided with a pressure compensation spring 17, the valve core connecting rod 11 is movably inserted into the inner sides of the external thread limit nut 12, the adjusting gasket 14, the sealing gasket 15 and the metal gasket 16 respectively.

[0022] A gasket gland 4 is fixedly installed on the top of the needle valve body 1, and an embedded gland 18 is fixedly connected to the bottom end of the gasket gland 4. The embedded gland 18 is movably inserted into the inner side of the valve core connecting groove 9. The middle part of the adjustment support part 5 is threadedly connected with a valve adjustment rod 7, and the top of the valve adjustment rod 7 is fixedly connected with an adjustment rudder 6. The valve adjustment rod 7 can be driven to rotate by rotating the adjustment rudder 6 by external force, and the rotating valve adjustment rod 7 moves up and down on the adjustment support part 5 to realize the opening and closing of the valve.

[0023] The top of the external thread limit nut 12 is symmetrically provided with notches, and the bottom end of the adjusting gasket 14 is symmetrically fixedly connected with a block matching the notch at the top end of the external thread limit nut 12. The notch at the top end of the external thread limit nut 12 facilitates installation and removal, and the pressure is balanced by clamping the block at the bottom end of the adjusting gasket 14 inside the notch at the top end of the external thread limit nut 12.

[0024] The top end of the pressure compensation spring 17 is in close contact with the bottom end of the embedded pressure cover 18, and the bottom end of the pressure compensation spring 17 is in close contact with the top end of the metal gasket 16. During installation, the pressure compensation spring 17 is squeezed to contract and store elastic force. When the sealing gasket 15 is worn, the pressure compensation spring 17 stretches and squeezes the metal gasket 16 through the stored elastic force. The metal gasket 16 is squeezed to apply pressure to the sealing gasket 15, thereby preventing the sealing gasket 15 from loosening and maintaining the seal.

[0025] The gasket gland 4 is located on the inner side of the adjustment support portion 5 , and the valve adjustment rod 7 is movably inserted on the inner side of the gasket gland 4 .

[0026] Working principle: During use, first insert the valve core connecting rod 11 into the interior of the valve core connecting groove 9, and then thread the external thread limiting nut 12 to the inner side of the valve core connecting groove 9 through the notch at the top of the external thread limiting nut 12, and place the adjusting gasket 14 on the top of the external thread limiting nut 12, and the block at the bottom of the adjusting gasket 14 is located inside the notch at the top of the external thread limiting nut 12, and then place multiple sealing gaskets 15 on the top of the adjusting gasket 14, and place the metal gasket 16 on the top of the sealing gasket 15, and then place the pressure compensation spring 17 on the top of the metal gasket 16, and then place the gasket gland 4 on the top of the needle valve body 1 by external force, and insert the embedded gland 18 on the inner side of the valve core connecting groove 9, press the gasket gland 4 downward by external force and squeeze the pressure compensation spring 17 to shrink the stored elastic force, and fix the gasket gland 4 to the needle valve body by bolts. The top of the body 1 is then fixedly installed on the top of the needle valve body 1, and the adjusting support part 5 is located on the outside of the gasket gland 4. The adjusting rudder 6 is then rotated by external force to drive the valve adjusting rod 7 to be threadedly connected to the adjusting support part 5, until the bottom end of the valve adjusting rod 7 is close to the top of the valve core connecting rod 11. At this time, the bottom end of the tapered valve core 13 is close to the top of the input hole groove 8 close to the valve core connecting groove 9 to close the valve port. When the valve needs to be opened, the adjusting rudder 6 is rotated by external force. The rotation of the adjusting rudder 6 drives the valve adjusting rod 7 to move upward. Since there is high-pressure fluid inside the input hole groove 8, the tapered valve core 13 moves upward under the push of the fluid pressure, and the fluid flows into the output hole groove 10 through the valve core connecting groove 9. After a period of use, the sealing gasket 15 will be worn, and the worn sealing gasket 15 is squeezed by the elastic force stored in the pressure compensation spring 17 to achieve continuous sealing and avoid valve body leakage.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A long-life needle valve adapted to ultra-high pressure working conditions, comprising a needle valve body (1), characterized in that: The outer side of the needle valve body (1) is evenly fixedly connected with a reinforcement frame (2), the outer side of the needle valve body (1) is evenly fixedly connected with a reinforcement rod (3), the reinforcement rod (3) and the reinforcement frame (2) are fixedly connected, one end of the needle valve body (1) is provided with an input hole groove (8), the other end of the needle valve body (1) is provided with an output hole groove (10), the middle part of the top end of the needle valve body (1) is provided with a valve core connecting groove (9), the input hole groove (8) and the output hole groove (10) are connected through the valve core connecting groove (9), and the top end of the needle valve body (1) is fixedly installed with an adjustment support portion (5); The internal thread of the valve core connection groove (9) is connected to an external thread limit nut (12), the inner side of the external thread limit nut (12) is movably connected to a valve core connection rod (11), the bottom end of the valve core connection rod (11) is fixedly connected to a conical valve core (13), the top end of the external thread limit nut (12) is provided with an adjusting gasket (14), the top end of the adjusting gasket (14) is provided with a plurality of sealing gaskets (15), the top end of the sealing gasket (15) located at the top is provided with a metal gasket (16), and the top end of the metal gasket (16) is provided with a pressure compensation spring (17); A gasket pressure cover (4) is fixedly installed on the top end of the needle valve body (1), and an embedded pressure cover (18) is fixedly connected to the bottom end of the gasket pressure cover (4). The embedded pressure cover (18) is movably inserted into the inner side of the valve core connecting groove (9). The middle part of the adjustment support part (5) is threadedly connected to a valve adjustment rod (7), and the top end of the valve adjustment rod (7) is fixedly connected to an adjustment rudder (6).

2. The long-life needle valve adapted to ultra-high pressure conditions according to claim 1, characterized in that: The valve core connecting rod (11) is movably inserted into the inner sides of the external thread limit nut (12), the adjusting gasket (14), the sealing gasket (15) and the metal gasket (16).

3. The long-life needle valve adapted to ultra-high pressure conditions according to claim 1, characterized in that: The top end of the external thread limiting nut (12) is symmetrically provided with notches, and the bottom end of the conical valve core (13) is symmetrically fixedly connected with a clamping block matching the notch at the top end of the external thread limiting nut (12).

4. The long-life needle valve adapted to ultra-high pressure conditions according to claim 2, characterized in that: The bottom end of the valve regulating rod (7) is in contact with the top end of the external thread limiting nut (12).

5. The long-life needle valve adapted to ultra-high pressure conditions according to claim 1, characterized in that: The top end of the pressure compensation spring (17) is in close contact with the bottom end of the embedded pressure cover (18), and the bottom end of the pressure compensation spring (17) is in close contact with the top end of the metal gasket (16).

6. The long-life needle valve adapted to ultra-high pressure conditions according to claim 1, characterized in that: The gasket pressure cover (4) is located on the inner side of the adjustment support portion (5), and the valve adjustment rod (7) is movably inserted into the inner side of the gasket pressure cover (4).

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