Corrosion-resistant long-acting rotary closing type check valve

Abstract

The utility model relates to the technical field of control valves for fluid pipelines, in particular to a corrosion-resistant long-acting rotary closing type check valve which comprises a valve body, a first support and a second support are arranged in the valve body, a sliding rod is movably connected to the middle of the first support, a valve element is fixedly connected to the sliding rod, a valve port is formed in the valve body, and a valve rod is fixedly connected to the valve element. The valve element can close the valve port in a one-way mode, the sliding rod is sleeved with a spring, and the spring deforms when the valve element is away from the valve port. The valve further comprises a guide mechanism, the guide mechanism is arranged in the valve body, and the guide mechanism can enable the sliding rod to rotate while sliding relative to the first support. The check valve is rotationally closed in a spiral motion mode, impact is avoided when the valve element closes the valve port, and therefore untight closing caused by deformation is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of control valve for fluid pipeline, specifically a kind of corrosion-resistant long-acting rotary closed check valve. BACKGROUND

[0002] Various types of check valves are installed on oil well, production equipment and pipeline in petroleum, chemical and refining industries.According to the safety production management regulations, the check valve used in high temperature, high pressure and corrosive medium pipeline must be metal structure, that is, the valve core and valve port are metal materials.Most of the check valves are reciprocating axial movement to close the valve port, that is, the valve core and valve port collide when the valve port is closed.Because the pressure in the pipeline is high, in order to reduce the deformation caused by the collision of the valve core and valve port when the valve port is closed, the key structure of the check valve is made of high hardness metal material.However, high hardness metal material is not resistant to corrosion, so the check valve will rust after a period of use, causing the valve port to close tightly or even fail.

[0003] In addition, the valve port of the check valve used in corrosive medium pipeline is installed with corrosion-resistant plastic sealing gasket or uses sealing ring for soft sealing.However, these non-metal materials are not resistant to high temperature and are prone to aging, and are easily damaged in medium containing dirt such as sand, so the service life of the sealing gasket or sealing ring is short and needs to be replaced frequently.The above problems have long plagued production enterprises in the production of petroleum, chemical and refining industries, not only affecting the normal production of enterprises, but also existing many safety hazards. CONTENT OF THE UTILITY MODEL

[0004] The utility model solves the technical problem of overcoming the defects of prior art and provides a corrosion-resistant long-acting rotary closed check valve.

[0005] In order to solve the above technical problem, the utility model provides the following technical scheme:

[0006] A kind of corrosion-resistant long-acting rotary closed check valve, including valve body, first support and second support are respectively arranged in valve body, the middle part of first support is movably connected with sliding rod, sliding rod is fixedly connected with valve core, valve body is provided with valve port, valve core can close valve port in one direction, spring is sleeved on the outside of sliding rod, spring deforms when valve core is away from valve port;

[0007] It further includes guiding mechanism, guiding mechanism is arranged in valve body, guiding mechanism can make sliding rod slide relative to first support while rotating.

[0008] In the structure, the guide mechanism can make the sliding rod and the valve core rotate simultaneously when the sliding rod drives the valve core to move to close the valve port, so that the valve core gradually approaches the valve port in a screw feeding manner when the valve core closes the valve port, thereby avoiding direct impact of the valve core on the valve port, and avoiding deformation of the valve core and the valve port, and for the medium with high viscosity and turbidity impurities such as sand and iron filings, the valve core can use the characteristics of screw movement to rotate and push the medium and impurities at the valve port in a way of playing shadowboxing, and close the valve port, thereby avoiding hard impact of the valve core and the valve port on the impurities, and rotating and pushing the impurities out, and ensuring the tightness of the seal.

[0009] The guide mechanism comprises a spiral slide and a positioning pin, the positioning pin is in sliding fit with the spiral slide, specifically, the positioning pin is partially arranged in the spiral slide, and the fit of the two can realize screw feeding;

[0010] The guide mechanism further comprises a shaft sleeve, the shaft sleeve is fixedly connected to the second support, and the sliding rod is movably penetrated through the shaft sleeve;

[0011] Specific arrangement modes include that the positioning pin is fixed in position relative to the shaft sleeve, and the spiral slide is arranged on the sliding rod, or the positioning pin is fixed in position relative to the valve core, and the spiral slide is arranged on the shaft sleeve.

[0012] The first arrangement structure of the above arrangement mode is that the spiral slide is arranged outside the sliding rod, the shaft sleeve has the positioning pin fixedly connected inside, and the end of the sliding rod, on which the spiral slide is arranged, is movably arranged inside the shaft sleeve, so that the positioning pin is in sliding fit with the spiral slide.

[0013] Further arrangement is that the first support is arranged close to the outlet end of the valve body, the second support is arranged close to the inlet end of the valve body, the shaft sleeve is fixedly connected to the side of the second support away from the inlet end of the valve body, the adjusting nut is threadedly connected to the sliding rod, the shock-absorbing pad is movably sleeved outside the sliding rod, and the spring is arranged between the adjusting nut and the shock-absorbing pad, and the adjusting nut, the spring and the shock-absorbing pad are located between the shaft sleeve and the first support. The adjusting nut can be used to adjust the opening pressure of the one-way valve.

[0014] Further arrangement is that the first support is arranged close to the inlet end of the valve body, the second support is arranged close to the outlet end of the valve body, the shaft sleeve is fixedly connected to the side of the second support away from the inlet end of the valve body, the spring is arranged between the valve core and the second support, the adjusting nut is threadedly connected to the end of the sliding rod away from the spiral slide, the shock-absorbing pad is movably sleeved outside the sliding rod, and the shock-absorbing pad is arranged between the adjusting nut and the first support.

[0015] The second arrangement structure is that the shaft sleeve has the spiral slide opened on the outer surface, the valve core has the positioning pin fixedly connected through the guide rod, the positioning pin is in sliding fit with the spiral slide, and the sliding rod is movably penetrated through the shaft sleeve.

[0016] Further, the first support is arranged close to the inlet end of the valve body, the second support is arranged close to the outlet end of the valve body, the second support is fixedly connected with a shaft sleeve on one side close to the inlet end of the valve body, the spring is arranged between the valve core and the shaft sleeve, the sliding rod is threadedly connected with an adjusting nut on the end away from the shaft sleeve, a shock pad is movably sleeved on the outer portion of the sliding rod, and the shock pad is arranged between the adjusting nut and the first support.

[0017] The inlet of the valve body is provided with a spherical structure of a flow distributor, the flow distributor is arranged at the center position of the valve body, and the convex curved surface faces the inlet end of the valve body.

[0018] The first support comprises a first outer disc, a first connecting rod and a first inner disc, the first connecting rod is connected between the first outer disc and the first inner disc, a passage between the first outer disc and the first inner disc is arranged as a valve port, a guide hole is formed at the center position of the first inner disc, the sliding rod movably penetrates through the guide hole, and the first outer disc is fixedly connected with the inner wall of the valve body.

[0019] The second support comprises a second outer disc, a second connecting rod and a second inner disc, the second connecting rod is connected between the second outer disc and the second inner disc, a fluid passage is formed between the second outer disc and the second inner disc, and the outer wall of the second outer disc is threadedly screwed to the inner wall of the valve body, so that the position of the second support in the valve body is adjustable, and the opening pressure of the check valve can be adjusted.

[0020] The beneficial effects achieved by the utility model are as follows:

[0021] The utility model adopts the spiral motion mode to rotate to close the check valve, avoids the impact generated when the valve core closes the valve port, thereby avoiding the deformation caused by the impact to cause the closing to be not tight, and when the check valve is rotated to be closed, for the medium with turbid impurities such as viscous and containing sand and iron filings, the utility model can utilize the spiral rotating characteristics to push out the impurities and medium on the valve port in the way of playing shadow boxing and close the valve port, and leakage is avoided.

[0022] The position of the second support is adjustable, and the opening pressure of the valve core can be conveniently adjusted.

[0023] The utility model sets the adjusting nut and the shock pad, has the functions of limiting the opening size of the valve core, preventing the spring from being excessively compressed and damaged and damping.

[0024] The utility model sets the flow distributor at the inlet of the check valve, can distribute the entering fluid, and prevents the high-speed fluid from directly eroding the control and movement components in the valve body.

[0025] The utility model discloses a valve body is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the present utility model, and constitute a part of the specification, and are used together with the embodiments of the present utility model to explain the present utility model, and do not constitute the limitation to the present utility model. In the drawings:

[0027] Figure 1 It is the structural schematic diagram of the utility model embodiment one, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0028] Figure 2 It is the structural schematic diagram of the utility model embodiment one (valve core open state), and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0029] Figure 3 It is the internal structure schematic diagram of the second support and the shaft sleeve in the utility model embodiment one, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0030] Figure 4 It is the plan view of the second support in the utility model embodiment one, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0031] Figure 5 It is the plan view of the first support in the utility model embodiment one, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0032] Figure 6 It is the structural schematic diagram of the utility model embodiment two, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0033] Figure 7 It is the structural schematic diagram of the utility model embodiment two (valve core open state), and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0034] Figure 8 It is the structural schematic diagram of the sliding rod and the valve core in the utility model embodiment two, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0035] Figure 9 It is the structural schematic diagram of the utility model embodiment three, and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0036] Figure 10 It is the structural schematic diagram of the utility model embodiment three (valve core open state), and the first support is made of stainless steel material, environmental protection corrosion -resisting, is applicable to the high temperature, high pressure, high corrosion environment of petroleum, chemical industry, refining etc. industry, also apply to biological pharmacy, medical health etc. environmental protection field, can also play the good check action to the muddy silt of various medium in the bad scene of viscous turbidity simultaneously.

[0037] In the drawing: 1, valve body; 2, second support; 21, second outer disc; 22, second connecting rod; 23, second inner disc; 3, positioning pin; 4, spring; 5, shock pad; 6, first support; 61, first outer disc; 62, first connecting rod; 63, first inner disc; 64, guide hole; 7, valve core; 8, shunt cover; 9, shaft sleeve; 10, sliding rod; 11, adjusting nut; 12, spiral slide; 13, guide rod. Detailed Implementation

[0038] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0039] Example 1: As Figures 1-5 As shown, a corrosion-resistant, long-life, closed-loop valve includes a valve body 1, and a first support 6 and a second support 2 are respectively installed inside the valve body 1.

[0040] The first bracket 6 includes a first outer disc 61, a first connecting rod 62, and a first inner disc 63. The first outer disc 61 and the first inner disc 63 are connected by the first connecting rod 62. The channel between the first outer disc 61 and the first inner disc 63 is set as a valve port. A guide hole 64 is opened at the center of the first inner disc 63. The sliding rod 10 moves through the guide hole 64. The first outer disc 61 is fixedly connected to the inner wall of the valve body 1.

[0041] The second support 2 includes a second outer disc 21, a second connecting rod 22, and a second inner disc 23. The second outer disc 21 and the second inner disc 23 are connected by the second connecting rod 22, and a fluid channel is formed between them. The outer wall of the second outer disc 21 is threaded onto the inner wall of the valve body 1, thereby making the position of the second support 2 inside the valve body 1 adjustable, and thus enabling adjustment of the opening pressure of the check valve. A hole is provided in the middle of the second inner disc 23 to allow the sliding rod 10 to pass through.

[0042] A sliding rod 10 is movably connected to the middle of the first bracket 6. A valve core 7 is fixedly connected to the sliding rod 10. The valve core 7 can close the valve port in one direction. A spring 4 is sleeved on the outside of the sliding rod 10. The spring 4 deforms when the valve core 7 moves away from the valve port, thereby storing energy.

[0043] The corrosion-resistant, long-life, closed-loop valve also includes a guide mechanism, which is located inside the valve body 1. The guide mechanism enables the sliding rod 10 to slide relative to the first support 6 while rotating.

[0044] Specifically, the guiding mechanism includes a spiral slide 12 and a positioning pin 3. The positioning pin 3 is slidably engaged with the spiral slide 12. Specifically, the spiral slide 12 is a spiral groove track, and the positioning pin 3 is partially disposed inside the spiral slide 12. The cooperation between the two enables spiral feeding.

[0045] The guiding mechanism also includes a bushing 9, which is fixedly connected to the second bracket 2, and the sliding rod 10 moves through the bushing 9.

[0046] The specific configuration is as follows: the positioning pin 3 is fixed relative to the bushing 9, and the spiral slide 12 is disposed on the sliding rod 10. Furthermore, the spiral slide 12 is disposed outside the sliding rod 10, the positioning pin 3 is fixedly connected inside the bushing 9, and one end of the sliding rod 10 with the spiral slide 12 is movably disposed inside the bushing 9, allowing the positioning pin 3 and the spiral slide 12 to slide in cooperation.

[0047] One end of the positioning pin 3 can extend out of the bushing 9; the position of the spiral slide 12 on the sliding rod 10 can be different from the diameter of the main body of the sliding rod 10.

[0048] The guiding mechanism enables the sliding rod 10 and the valve core 7 to rotate simultaneously when the sliding rod 10 moves the valve core 7 to close the valve port. As the valve core 7 closes the valve port, it gradually approaches the valve port in a spiral feed manner, avoiding direct impact of the valve core 7 on the valve port and thus preventing deformation of the valve core 7 and the valve port. Furthermore, for viscous media and turbid impurities such as sand and iron filings, the valve core 7 can utilize its spiral movement to rotate and push the media and impurities at the valve port forward and close the valve port in a Tai Chi-like manner. This avoids hard impact between the valve core 7 and the valve port and the impurities, while rotating and pushing the impurities out, ensuring a tight seal.

[0049] The first bracket 6 is located near the outlet end of the valve body 1, and the second bracket 2 is located near the inlet end of the valve body 1. A bushing 9 is fixedly connected to the side of the second bracket 2 away from the inlet end of the valve body 1. An adjusting nut 11 is threaded onto the sliding rod 10. A shock-absorbing pad 5 is also movably sleeved on the sliding rod 10. A spring 4 is located between the adjusting nut 11 and the shock-absorbing pad 5. The adjusting nut 11, the spring 4, and the shock-absorbing pad 5 are located between the bushing 9 and the first bracket 6.

[0050] A spherical flow divider 8 is provided at the inlet of the valve body 1. The flow divider 8 is located at the center of the valve body 1, with the protruding curved surface facing the inlet end of the valve body 1.

[0051] Specifically, the flow divider 8 is fixedly connected to the second inner disc 23 of the second bracket 2.

[0052] Example 2: Example 2 is basically the same as Example 1, except that, as Figures 6-8 As shown, the first bracket 6 is located near the inlet end of the valve body 1, and the second bracket 2 is located near the outlet end of the valve body 1. A bushing 9 is fixedly connected to the side of the second bracket 2 away from the inlet end of the valve body 1. The spring 4 is located between the valve core 7 and the second bracket 2. An adjusting nut 11 is threadedly connected to the end of the sliding rod 10 away from the spiral slide 12. A shock-absorbing pad 5 is movably sleeved on the outside of the sliding rod 10. The shock-absorbing pad 5 is located between the adjusting nut 11 and the first bracket 6, and is located near the first bracket 6.

[0053] The shunt cover 8 is connected inside the valve body 1 through a support structure similar to the second support 2 and is arranged close to the inlet end of the valve body 1.

[0054] Embodiment three: Embodiment three is basically the same as Embodiment one, except that, as shown in Figure 9 Figure 10 The positioning pin 3 is fixed relative to the position of the valve core 7, and the spiral slide 12 is arranged on the shaft sleeve 9. Specifically, the outer surface of the shaft sleeve 9 is provided with a spiral slide 12, the valve core 7 is fixedly connected with a positioning pin 3 through a guide rod 13, the positioning pin 3 is in sliding fit with the spiral slide 12, and the sliding rod 10 is movably penetrated through the shaft sleeve 9.

[0055] Among them, the guide rod 13 and the positioning pin 3 can be provided with two symmetrical groups, and the spiral slide 12 is correspondingly provided with two groups.

[0056] Further, the first support 6 is arranged close to the inlet end of the valve body 1, the second support 2 is arranged close to the outlet end of the valve body 1, the shaft sleeve 9 is fixedly connected to one side of the valve body 1 close to the inlet end, the spring 4 is arranged between the valve core 7 and the shaft sleeve 9, the adjusting nut 11 is threadedly connected to one end of the sliding rod 10 away from the shaft sleeve 9, the shock pad 5 is movably sleeved on the outside of the sliding rod 10, and the shock pad 5 is arranged between the adjusting nut 11 and the first support 6.

[0057] The shunt cover 8 is connected inside the valve body 1 through a support structure similar to the second support 2 and is arranged close to the inlet end of the valve body 1.​

Claims

1. A corrosion-resistant, long-life, closed-loop valve, characterized in that, The valve body (1) includes a first bracket (6) and a second bracket (2) respectively. A sliding rod (10) is movably connected in the middle of the first bracket (6). A valve core (7) is fixedly connected on the sliding rod (10). A valve port is provided in the valve body (1). The valve core (7) can close the valve port in one direction. A spring (4) is sleeved on the outside of the sliding rod (10). The spring (4) deforms when the valve core (7) moves away from the valve port. It also includes a guide mechanism, which is disposed inside the valve body (1). The guide mechanism enables the sliding rod (10) to slide relative to the first bracket (6) while rotating.

2. The corrosion-resistant, long-life, closed-loop valve according to claim 1, characterized in that, The guiding mechanism includes a spiral slide (12) and a positioning pin (3). The positioning pin (3) slides with the spiral slide (12). The guiding mechanism also includes a bushing (9). The bushing (9) is fixedly connected to the second bracket (2). The sliding rod (10) moves through the bushing (9). The positioning pin (3) is fixed relative to the bushing (9), and the spiral slide (12) is set on the sliding rod (10), or the positioning pin (3) is fixed relative to the valve core (7), and the spiral slide (12) is set on the bushing (9).

3. The corrosion-resistant, long-life, closed-loop valve according to claim 2, characterized in that, The spiral slide (12) is located outside the sliding rod (10), and a positioning pin (3) is fixedly connected inside the bushing (9). One end of the sliding rod (10) with the spiral slide (12) is movably located inside the bushing (9).

4. The corrosion-resistant, long-life, closed-loop valve according to claim 3, characterized in that, The first bracket (6) is located near the outlet end of the valve body (1), and the second bracket (2) is located near the inlet end of the valve body (1). A bushing (9) is fixedly connected to the side of the second bracket (2) away from the inlet end of the valve body (1). An adjusting nut (11) is threaded onto the sliding rod (10). A shock-absorbing pad (5) is also movably sleeved on the sliding rod (10). A spring (4) is located between the adjusting nut (11) and the shock-absorbing pad (5). The adjusting nut (11), the spring (4) and the shock-absorbing pad (5) are located between the bushing (9) and the first bracket (6).

5. The corrosion-resistant, long-life, closed-loop valve according to claim 3, characterized in that, The first bracket (6) is located near the inlet end of the valve body (1), and the second bracket (2) is located near the outlet end of the valve body (1). A bushing (9) is fixedly connected to the side of the second bracket (2) away from the inlet end of the valve body (1). The spring (4) is located between the valve core (7) and the second bracket (2). An adjusting nut (11) is threadedly connected to the end of the sliding rod (10) away from the spiral slide (12). A shock-absorbing pad (5) is movably sleeved on the outside of the sliding rod (10). The shock-absorbing pad (5) is located between the adjusting nut (11) and the first bracket (6).

6. The corrosion-resistant, long-life, closed-loop valve according to claim 2, characterized in that, The outer surface of the bushing (9) is provided with a spiral slide (12), the valve core (7) is fixedly connected to the positioning pin (3) through the guide rod (13), and the sliding rod (10) is movably connected through the bushing (9).

7. The corrosion-resistant, long-life, closed-loop valve according to claim 6, characterized in that, The first bracket (6) is located near the inlet end of the valve body (1), and the second bracket (2) is located near the outlet end of the valve body (1). A bushing (9) is fixedly connected to one side of the second bracket (2) near the inlet end of the valve body (1). The spring (4) is located between the valve core (7) and the bushing (9). An adjusting nut (11) is threaded to one end of the sliding rod (10) away from the bushing (9). A shock-absorbing pad (5) is movably sleeved on the outside of the sliding rod (10). The shock-absorbing pad (5) is located between the adjusting nut (11) and the first bracket (6).

8. The corrosion-resistant, long-life, closed-loop valve according to claim 1, characterized in that, A spherical flow divider (8) is provided at the inlet of the valve body (1).

9. The corrosion-resistant, long-life, closed-loop valve according to claim 1, characterized in that, The first bracket (6) includes a first outer disc (61), a first connecting rod (62) and a first inner disc (63). The first outer disc (61) and the first inner disc (63) are connected by the first connecting rod (62). The channel between the first outer disc (61) and the first inner disc (63) is set as a valve port. A guide hole (64) is opened at the center of the first inner disc (63). The sliding rod (10) moves through the guide hole (64). The first outer disc (61) is fixedly connected to the inner wall of the valve body (1).

10. The corrosion-resistant, long-life, closed-loop valve according to claim 1, characterized in that, The second bracket (2) includes a second outer disc (21), a second connecting rod (22) and a second inner disc (23). The second outer disc (21) and the second inner disc (23) are connected by the second connecting rod (22). The outer wall of the second outer disc (21) is screwed onto the inner wall of the valve body (1).

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