Gapless self-centering valve core minimum flow regulating valve

Abstract

The utility model discloses a minimum flow regulating valve with a gapless self-centering valve core, which relates to the technical field of regulating valves and comprises a valve body. The bottom of the valve cover is fixedly connected with the top of the valve body; the outer side of the valve rod is fixedly connected with the inner side of the valve cover; the outer side of the feeding assembly is in sliding connection with the inner side of the valve body; a discharging assembly; the top of the valve element assembly is fixedly connected with the bottom of the valve rod; the valve element assembly comprises a movable block, a sliding ring is fixedly connected to the bottom of the movable block, and a sliding groove is formed in the wall of the valve body. According to the device, the sliding ring is matched with the sliding groove, the valve element assembly is positioned and prevented from deviating, due to the fact that no gap exists between the valve rod and the valve body, the situation that the position of a valve element is affected by shaking of the valve rod is avoided, materials are filtered by arranging the feeding assembly, and impurities in the materials are prevented from blocking a channel and affecting operation of the valve.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a minimum flow regulating valve with a gapless self-centering valve core. Background Art

[0002] The minimum flow regulating valve is also called the boiler feed pump recirculation valve. In a power plant, it is installed at the outlet of the feed pump and connected to the deaerator. The boiler feed pump sucks water from the deaerator and sends it to the boiler. To prevent the feed pump from overheating and cavitation, the flow rate of the feed pump must not be less than a certain specified safe flow rate, that is, the minimum flow rate, under any circumstances.

[0003] In the prior art, the flow regulating valve has high requirements for sealing performance. After long-term use, the valve core lacks self-centering ability, which easily causes the valve core to shift, affecting the valve sealing performance. Moreover, the material carries impurities, and the accumulation of impurities easily blocks the valve channel, affecting the valve performance. To solve the above problems, we propose a minimum flow regulating valve with a gapless self-centering valve core. Summary of the Utility Model

[0004] In view of the deficiencies of the prior art, the technical solution adopted by the utility model to solve its technical problems is: a minimum flow regulating valve with a gapless self-centering valve core, including a valve body; a valve cover, the bottom of the valve cover is fixedly connected to the top of the valve body; a valve stem, the outside of the valve stem is fixedly connected to the inside of the valve cover, and the bottom of the valve stem penetrates through the valve cover and extends into the interior of the valve body; a feeding component, the outside of the feeding component is slidably connected to the inside of the valve body, and the feeding component is used to feed the material into the valve body; a discharging component, the outside of the discharging component is fixedly connected to one side of the valve body cavity away from the feeding component, and the discharging component is used to send the fed material out of the valve body;

[0005] a valve core component, the top of the valve core component is fixedly connected to the bottom of the valve stem, and the valve core component is used to control the entry and exit of the material; the valve core component includes a movable block, the top of the movable block is fixedly connected to the bottom of the valve stem, the bottom of the movable block is fixedly connected with a sliding ring, a chute is opened in the wall of the valve body, and a sealing strip is fixedly connected to the bottom of the inner cavity of the chute; the chute is located directly below the sliding ring, and the outside of the sliding ring is slidably connected to the inside of the chute;

[0006] By setting the valve core component, the surface of the sliding ring inside the valve core component fits with the chute, strengthening the sealing performance of the valve. The sliding ring is inserted into the chute to position the valve core component and prevent the valve core component from shifting. There is no gap between the valve stem and the valve body, avoiding the influence of the valve stem shaking on the position of the valve core. The material is processed by the feeding component, which plays a filtering role to prevent impurities in the material from blocking the channel and affecting the valve operation.

[0007] Preferably, the feeding assembly includes a fixed pipe, the outer side of the fixed pipe is slidably connected to the inner side of the valve body, an intercepting rod is fixedly connected to the inner side of the fixed pipe, and a filtering assembly is fixedly connected to one side of the inner cavity of the fixed pipe away from the intercepting rod. By setting the feeding assembly, the material is processed, impurities in the material are filtered, the probability of impurities entering the valve interior is reduced, and during the opening and closing of the valve, impurities in the material clogging the channel and affecting the operation of the valve are avoided.

[0008] Preferably, the filtering assembly includes a fixed column, the outer side of the fixed column is fixedly connected to the outer side of the fixed pipe, a conical sieve plate is fixedly connected to the inner side of the fixed column, and a discharge port is formed in the wall of the fixed column. By filtering the material through the filtering assembly, impurities in the material are reduced, and the situation of impurities clogging the channel and affecting the operation of the valve is avoided.

[0009] Preferably, the discharging assembly includes a circular pipe, the outer side of the circular pipe is fixedly connected to one side of the inner cavity of the valve body away from the feeding assembly, a guiding plate is fixedly connected to the inner side of the circular pipe, and a flow dividing plate is fixedly connected to one side of the inner cavity of the circular pipe away from the guiding plate. By diverting the material through the discharging assembly, the flowing speed of the material is slowed down, the instantaneous impact force of the material is reduced, and the damage to the valve caused by the material is decreased.

[0010] The beneficial effects of the present utility model are as follows:

[0011] 1. By setting the valve core assembly in the present utility model, the sliding ring inside the valve core assembly fits the surface of the sliding groove, enhancing the sealing performance of the valve. The sliding ring is inserted into the sliding groove to position the valve core assembly and prevent the valve core assembly from shifting. There is no gap between the valve stem and the valve body, avoiding the valve stem shaking and affecting the position of the valve core.

[0012] 2. By setting the feeding assembly in the present utility model, the material is processed, impurities in the material are filtered, the probability of impurities entering the valve interior is reduced, and during the opening and closing of the valve, impurities in the material clogging the channel and affecting the operation of the valve are avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the front view of the present utility model;

[0014] Figure 2 is the sectional view of the present utility model;

[0015] Figure 3 is the structural sectional view of the valve core assembly of the present utility model;

[0016] Figure 4 is the structural sectional view of the feeding assembly of the present utility model;

[0017] Figure 5 is the structural sectional view of the filtering assembly of the present utility model;

[0018] Figure 6 It is a structural sectional view of the discharge component of the present utility model.

[0019] In the figure: 1, valve body; 2, valve cover; 3, valve rod; 4, valve core assembly; 41, movable block; 42, sliding ring; 43, sealing strip; 44, chute; 5, feeding component; 51, fixed pipe; 52, intercepting rod; 53, filtering component; 531, fixed column; 532, conical sieve plate; 533, discharge port; 6, discharge component; 61, round pipe; 62, guiding plate; 63, flow dividing plate. Specific embodiments

[0020] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present utility model are given for purposes of illustration and description, and are not exhaustive or limit the present utility model to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present utility model, and enable those of ordinary skill in the art to understand the present utility model and thus design various embodiments with various modifications suitable for specific purposes. Embodiment

[0021] Please refer to Figures 1-6 , the present utility model provides a technical solution: a minimum flow regulating valve with a gapless self-centering valve core, including a valve body 1; a valve cover 2, the bottom of the valve cover 2 is fixedly connected to the top of the valve body 1; a valve rod 3, the outside of the valve rod 3 is fixedly connected to the inside of the valve cover 2, and the bottom of the valve rod 3 penetrates through the valve cover 2 and extends into the inside of the valve body 1; a feeding component 5, the outside of the feeding component 5 is slidably connected to the inside of the valve body 1, and the feeding component 5 is used to feed materials into the valve body 1; a discharge component 6, the outside of the discharge component 6 is fixedly connected to one side of the inner cavity of the valve body 1 away from the feeding component 5, and the discharge component 6 is used to discharge the fed materials out of the valve body 1;

[0022] a valve core assembly 4, the top of the valve core assembly 4 is fixedly connected to the bottom of the valve rod 3, and the valve core assembly 4 is used to control the entry and exit of materials; the valve core assembly 4 includes a movable block 41, the top of the movable block 41 is fixedly connected to the bottom of the valve rod 3, the bottom of the movable block 41 is fixedly connected with a sliding ring 42, a chute 44 is opened in the wall of the valve body 1, and a sealing strip 43 is fixedly connected to the bottom of the inner cavity of the chute 44; the chute 44 is located directly below the sliding ring 42, and the outside of the sliding ring 42 is slidably connected to the inside of the chute 44;

[0023] During use, the material is fed into the interior of the feed component 5. The material flows forward along the feed component 5 to the valve core component 4. The material exerts pressure on the valve core component 4. When the pressure reaches the minimum value for valve opening, the valve stem 3 slides upward along the valve cover 2 under the action of an external driving device. The valve stem 3 drives the movable block 41 to slide upward. The movable block 41 drives the sliding ring 42 to slide upward. The movable block 41 releases the valve body 1, and the valve opens. The material flows forward along the space between the movable block 41 and the valve body 1. The material flows to the discharge component 6 and flows outward along the discharge component 6 to the outside of the valve body 1. When the material flow rate is small and the pressure does not reach the minimum value for valve opening, the valve stem 3 moves downward along the valve cover 2 under the drive of the external driving device. The valve stem 3 drives the movable block 41 to move downward. The movable block 41 drives the sliding ring 42 to move downward. The sliding ring 42 is inserted into the interior of the chute 44. The bottom of the sliding ring 42 comes into contact with the sealing strip 43 to seal the valve.

[0024] By providing the valve core component 4, the surface of the sliding ring 42 inside the valve core component 4 fits the surface of the chute 44, strengthening the sealing performance of the valve. The sliding ring 42 is inserted into the interior of the chute 44 to position the valve core component 4 and prevent the valve core component 4 from shifting. There is no gap between the valve stem 3 and the valve body 1, avoiding the influence of the shaking of the valve stem 3 on the position of the valve core. By processing the material through the feed component 5, a filtering effect is achieved to prevent impurities in the material from blocking the passage and affecting the operation of the valve.

[0025] The feed component 5 includes a fixed pipe 51. The outer side of the fixed pipe 51 is slidably connected to the inner side of the valve body 1. The inner side of the fixed pipe 51 is fixedly connected with an intercepting rod 52. On the side of the inner cavity of the fixed pipe 51 away from the intercepting rod 52, a filtering component 53 is fixedly connected. During use, the material is fed into the feed component 5. The material flows forward along the fixed pipe 51 in the feed component 5 to the intercepting rod 52. The intercepting rod 52 intercepts the larger impurities in the material. The remaining material flows along the fixed pipe 51 to the filtering component 53 and continues to flow forward after being filtered by the filtering component 53. When not in use, the feed component 5 can be removed to clean the impurities in the feed component 5. By providing the feed component 5, the material is processed to filter the impurities in the material, reducing the probability of impurities entering the interior of the valve and avoiding the blockage of the passage by impurities in the material during the opening and closing of the valve, which affects the operation of the valve.

[0026] The filtering component 53 includes a fixed column 531. The outer side of the fixed column 531 is fixedly connected to the outer side of the fixed pipe 51. The inner side of the fixed column 531 is fixedly connected with a conical sieve plate 532. A discharge port 533 is formed in the wall of the fixed column 531. During use, the material flows along the fixed pipe 51 into the interior of the fixed column 531. The conical sieve plate 532 installed on the filtering component 53 filters the material. The impurities in the material are washed by the material, and the impurities move along the conical sieve plate 532 to the bottom of the fixed column 531, avoiding the accumulation of impurities at the same place and affecting the filtering effect. The filtered impurities enter the interior of the valve body 1 along the discharge port 533 and then flow along the valve body 1 to the valve core assembly 4. By filtering the material through the filtering component 53, the impurities in the material are reduced, and the blockage of the channel by impurities and the influence on the operation of the valve are avoided.

[0027] The discharge component 6 includes a circular pipe 61. The outer side of the circular pipe 61 is fixedly connected to one side of the inner cavity of the valve body 1 away from the feeding component 5. The inner side of the circular pipe 61 is fixedly connected with a guiding plate 62. A flow dividing plate 63 is fixedly connected to one side of the inner cavity of the circular pipe 61 away from the guiding plate 62. During use, the material flows into the interior of the circular pipe 61. Under the guidance of the guiding plate 62 in the discharge component 6, the material flows to the flow dividing plate 63, and the material flows to the outside along the flow dividing plate 63. During the flowing process, the guiding plate 62 and the flow dividing plate 63 play a certain role in slowing down the flow, reducing the flow rate of the material. By diverting the material through the discharge component 6, the flow speed of the material is slowed down, the instantaneous impact force of the material is reduced, and the damage to the valve caused by the material is reduced.

[0028] Working principle:

[0029] During use, the material is fed into the feeding component 5. The material flows forward along the fixed pipe 51 in the feeding component 5 to the intercepting rod 52. The intercepting rod 52 intercepts the larger impurities in the material. The remaining material flows along the fixed pipe 51 into the interior of the fixed pipe 51. The material flows along the fixed pipe 51 into the interior of the fixed column 531. The conical sieve plate 532 installed on the filtering component 53 filters the material. The impurities in the material are washed by the material, and the impurities move along the conical sieve plate 532 to the bottom of the fixed column 531, avoiding the accumulation of impurities at the same place and affecting the filtering effect. The filtered impurities enter the interior of the valve body 1 along the discharge port 533 and then flow along the valve body 1 to the valve core assembly 4;

[0030] At this time, the material exerts pressure on the valve core assembly 4. When the pressure reaches the minimum value for valve opening, the valve stem 3 slides upward along the valve cover 2 under the action of an external driving device. The valve stem 3 drives the movable block 41 to slide upward, and the movable block 41 drives the sliding ring 42 to slide upward. The movable block 41 releases the valve body 1, and the valve opens. The material flows forward along the space between the movable block 41 and the valve body 1. The material flows into the inside of the round tube 61, and along the guidance of the guide plate 62 in the discharge assembly 6, the material flows to the distribution plate 63 and then flows outward along the distribution plate 63 to the outside of the valve body 1.

[0031] When the material flow rate is small and the pressure does not reach the minimum value for valve opening, the valve stem 3 moves downward along the valve cover 2 under the drive of an external driving device. The valve stem 3 drives the movable block 41 to move downward, and the movable block 41 drives the sliding ring 42 to move downward. The sliding ring 42 is inserted into the inside of the chute 44, and the bottom of the sliding ring 42 contacts the sealing strip 43 to seal the valve.

[0032] Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art and related fields without creative efforts shall fall within the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention, unless otherwise specified and limited, shall be implemented according to the conventional means in the art.

Claims

1. A minimum flow regulating valve with a gapless self-centering valve core, characterized in that, Comprising: Valve body (1); Valve cover (2), the bottom of the valve cover (2) is fixedly connected to the top of the valve body (1); Valve rod (3), the outer side of the valve rod (3) is fixedly connected to the inner side of the valve cover (2), and the bottom of the valve rod (3) penetrates through the valve cover (2) and extends into the interior of the valve body (1); Feeding assembly (5), the outer side of the feeding assembly (5) is slidably connected to the inner side of the valve body (1), and the feeding assembly (5) is used to feed materials into the valve body (1); Discharging assembly (6), the outer side of the discharging assembly (6) is fixedly connected to one side of the inner cavity of the valve body (1) away from the feeding assembly (5), and the discharging assembly (6) is used to discharge the fed materials out of the valve body (1); Valve core assembly (4), the top of the valve core assembly (4) is fixedly connected to the bottom of the valve rod (3), and the valve core assembly (4) is used to control the inlet and outlet of materials; The valve core assembly (4) includes a movable block (41), the top of the movable block (41) is fixedly connected to the bottom of the valve rod (3), a sliding ring (42) is fixedly connected to the bottom of the movable block (41), a chute (44) is formed in the wall of the valve body (1), and a sealing strip (43) is fixedly connected to the bottom of the inner cavity of the chute (44).

2. The minimum flow regulating valve with a gapless self-centering valve core according to claim 1, characterized in that: The chute (44) is located directly below the sliding ring (42), and the outer side of the sliding ring (42) is slidably connected to the inner side of the chute (44).

3. The minimum flow regulating valve with a gapless self-centering valve core according to claim 1, characterized in that: The feeding assembly (5) includes a fixed pipe (51), the outer side of the fixed pipe (51) is slidably connected to the inner side of the valve body (1), an intercepting rod (52) is fixedly connected to the inner side of the fixed pipe (51), and a filtering assembly (53) is fixedly connected to one side of the inner cavity of the fixed pipe (51) away from the intercepting rod (52).

4. The minimum flow regulating valve with a gapless self-centering valve core according to claim 3, characterized in that: The filtering assembly (53) includes a fixed column (531), the outer side of the fixed column (531) is fixedly connected to the outer side of the fixed pipe (51), a conical sieve plate (532) is fixedly connected to the inner side of the fixed column (531), and a discharge port (533) is formed in the wall of the fixed column (531).

5. The minimum flow regulating valve of a gapless self-centering valve core according to claim 1, characterized in that: The discharging assembly (6) includes a circular pipe (61), the outer side of the circular pipe (61) is fixedly connected to one side of the inner cavity of the valve body (1) away from the feeding assembly (5), a guiding plate (62) is fixedly connected to the inner side of the circular pipe (61), and a flow dividing plate (63) is fixedly connected to one side of the inner cavity of the circular pipe (61) away from the guiding plate (62).

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