Buffer type piston flow regulating valve

Abstract

The utility model discloses a buffer type piston flow regulating valve, which relates to the technical field of piston regulating valves and comprises a main valve body, an inner container is arranged in the main valve body, a liquid inlet valve body is arranged at one end of the main valve body far away from the inner container, and a buffer component is arranged in the liquid inlet valve body. A piston assembly is arranged on the side, close to the liquid inlet valve body, of the interior of the inner container, a transmission pipe body is arranged in the middle of the interior of the inner container, and a piston driving assembly matched with the piston assembly is arranged in the transmission pipe body. A mouse cage is arranged on the side, away from the liquid inlet valve body, in the inner container. An external driving box is arranged on the outer side of the circumference of the main valve body. Through the multi-structure combination of the buffer assembly, the high-efficiency energy absorption characteristic is formed, excess energy can be rapidly absorbed when a system is subjected to transient impact or pressure fluctuation, and the flow speed of fluid is stably adjusted; impact and vibration during piston movement are effectively reduced, noise and part abrasion caused by vibration are reduced, and the precision and response speed of flow adjustment are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to piston regulating valve technical field, specifically, relate to a buffer formula's piston flow regulating valve. BACKGROUND

[0002] Piston flow regulating valve is a kind of control element commonly used in hydraulic system, and its main function is to adjust the flow of fluid by piston mechanism. The movement of piston in valve body changes the cross-sectional area of internal flow passage of valve. When piston moves in one direction, the cross-sectional area of flow passage decreases, and the flow of fluid through valve decreases. Conversely, the cross-sectional area of flow passage increases due to the movement of piston, and the flow increases.

[0003] However, the movement of valve core inside the existing flow regulating valve mostly depends on connecting rod mechanism. When force is applied to valve core, there is an angle between the direction of force and the direction of movement, which can easily cause uneven wear on the periphery of valve core. At the same time, the pin shaft at the hinge position of connecting rod is limited by thin shaft at both ends. Since these components are in fluid medium for a long time, they are prone to corrosion and risk of falling off after being washed, which can cause valve core failure. In addition, when the system is subjected to transient impact or pressure fluctuation, insufficient buffering measures can cause vibration to intensify, which not only weakens the adjustment accuracy, but also further accelerates the wear and fatigue of connecting rod and valve core and other components.

[0004] So far, no effective solution has been proposed for the problems in the related art. CONTENT OF THE UTILITY MODEL

[0005] To overcome the above technical problems existing in the prior art, the utility model provides a buffer type piston flow regulating valve.

[0006] Therefore, the utility model adopts the following specific technical solutions:

[0007] A buffer type piston flow regulating valve includes a main valve body, an inner container is arranged inside the main valve body, a liquid inlet valve body is arranged at one end of the main valve body away from the inner container, and a buffer assembly is arranged inside the liquid inlet valve body. A piston assembly is arranged on one side of the inner container close to the liquid inlet valve body, a transmission pipe body is arranged at the middle position of the inner container, a piston drive assembly cooperating with the piston assembly is arranged inside the transmission pipe body, a squirrel cage is arranged on one side of the inner container away from the liquid inlet valve body, and an external drive box is arranged on the circumferential outer side of the main valve body.

[0008] Further, in order to effectively isolate the external environment, protect the internal components from corrosion and external impact, and ensure the sealing of the entire system, a fixed flange is arranged at one end of the main valve body away from the liquid inlet valve body, an end face flange is arranged at one end of the liquid inlet valve body away from the main valve body, and an external cover is arranged on the circumferential outer side of the liquid inlet valve body.

[0009] Further, in order to absorb and relieve transient energy when impacted, reduce vibration and impact caused by pressure mutation, balance fluid power, ensure smooth movement of the valve core, prolong the service life of the key components, the buffer assembly comprises a sealing outer ring arranged in the liquid inlet valve body, a flow buffer hole plate is arranged on the inner side of the circumference of the sealing outer ring, a plurality of outer extension rods are arranged on the outer side of the circumference of the sealing outer ring, a plurality of sliding grooves matched with the outer extension rods are formed on the outer side of the circumference of the liquid inlet valve body, the top end of the outer extension rod penetrates into the inner side of the outer sealing cover, and a buffer spring is arranged between the top side of the outer extension rod and the inner side wall of the outer sealing cover.

[0010] Further, in order to help guide the fluid into a specific area, prevent foreign matter from entering the inner container, and play a filtering and protection role, the end of the inner container away from the liquid inlet valve body is fixedly connected with the main valve body, and a grid hole matched with the squirrel cage is formed in one side of the inner container.

[0011] Further, in order to make the piston head have good directivity and stability during flow regulation, effectively improve the accuracy and response speed of flow regulation, the piston assembly comprises a piston head arranged in the inner container and close to one end of the liquid inlet valve body, a push threaded rod is arranged at the center position of the inner side of the piston head, and limit rods are arranged above and below the push threaded rod; the ends of the two limit rods and the push threaded rod away from the piston head penetrate into the inner side of the transmission pipe body.

[0012] Further, in order to efficiently and stably transmit external power to the piston head, realize accurate flow regulation, and reduce the wear problem caused by different force angles in the traditional connecting rod mechanism, the piston driving assembly comprises a worm gear bracket arranged in the transmission pipe body, a transmission worm gear matched with the push threaded rod is arranged in the middle position of the worm gear bracket; a worm gear base is arranged on one side of the inner bottom of the transmission pipe body, a transmission worm gear matched with the transmission worm gear is arranged on the top of the worm gear base, the top end of the transmission worm gear penetrates into the inner side of the external driving box, a driven bevel gear is arranged at the top end of the transmission worm gear, a driving shaft is arranged in the inner side of the external driving box, a driving bevel gear matched with the driven bevel gear is arranged on the outer side of the driving shaft, and a driving motor matched with the driving shaft is arranged on the outer side of the external driving box.

[0013] Further, in order to effectively prevent fluid leakage and ensure the coordinated movement between the inner container, the transmission pipe body and the driving mechanism, the stability and maintenance convenience of the whole machine are greatly improved, a sealing pipe matched with the transmission worm gear is arranged between the inner wall of the main valve body and the outer wall of the inner container; a partition ring is arranged between the piston head and the transmission pipe body in the inner container, a plurality of positioning holes are formed on the outer side of the circumference of the partition ring, and a plurality of positioning columns matched with the positioning holes are arranged on the end face of the transmission pipe body.

[0014] The utility model discloses the beneficial effect is:

[0015] 1. Through the multiple structure combination of the buffer assembly, a set of high-efficiency energy absorption characteristics is formed, which can quickly absorb excess energy when the system is subjected to transient impact or pressure fluctuation, and smoothly regulate the fluid flow rate; not only effectively reduces the impact and vibration during the movement of the piston, reduces the noise and component wear caused by vibration, but also improves the accuracy and response speed of flow regulation. In addition, the design of the outer cover and the sealing outer ring ensures the good sealing of the system, prevents the intrusion of external corrosive media, thereby greatly prolongs the service life of the device and ensures the long-term stable operation of the entire fluid pipeline network.

[0016] 2. By integrating the functions of liquid buffer, piston adjustment and transmission drive, the compact arrangement of the internal structure of the regulating valve is realized; each structure is connected to each other and has distinct levels, so that the whole regulating valve is not only small in size, but also stable in structure, which not only ensures the sealing of the fluid system, but also effectively prevents the problems of component loosening and wear caused by long-term use. At the same time, the modular design facilitates the later maintenance and replacement, reduces the system maintenance cost and downtime risk, and provides a solid structural guarantee for realizing efficient and stable hydraulic control.

[0017] 3. By the combination of the worm gear, the worm and the bevel gear in the internal transmission pipe body, the energy transmission from the drive motor to the piston assembly is realized, and the threaded push rod and the limiting rod are designed by screwing, so that the piston movement is more accurate, and the problems of local wear and uneven stress caused by inconsistent force angle in the traditional connecting rod mechanism are avoided. At the same time, the drive shaft and the matching drive bevel gear are used in the external drive box, which can realize the stable output of large torque, reduce the dependence on additional speed reducer, make the overall structure more simple, and make the maintenance more convenient, thereby effectively improving the overall economy and wide applicability of the device. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 is a structure schematic view of a buffer type piston flow regulating valve according to an embodiment of the present application;

[0020] Figure 2 is a structure schematic view of a buffer type piston flow regulating valve according to an embodiment of the present application;

[0021] Figure 3 is a main valve body internal sectional view of a buffer type piston flow regulating valve according to an embodiment of the present application;

[0022] Figure 4 is Figure 3 is a local enlarged view of A in figure 1;

[0023] Figure 5 is a transverse sectional view of a buffer type piston flow regulating valve according to an embodiment of the present utility model;

[0024] Figure 6 is a longitudinal sectional view of a buffer type piston flow regulating valve according to an embodiment of the present utility model;

[0025] Figure 7 is a local sectional view of a main valve body in a buffer type piston flow regulating valve according to an embodiment of the present utility model.

[0026] In the drawings:

[0027] 1, main valve body; 2, inner container; 3, inlet valve body; 4, buffer assembly; 401, sealing outer ring; 402, slow flow hole plate; 403, outer extension rod; 404, sliding groove; 405, buffer spring; 5, piston assembly; 501, piston head; 502, push threaded rod; 503, limiting rod; 6, transmission pipe body; 7, piston drive assembly; 701, worm gear support; 702, transmission worm gear; 703, worm base; 704, transmission worm; 705, driven bevel gear; 706, drive shaft; 707, drive bevel gear; 708, drive motor; 8, squirrel cage; 9, external drive box; 10, fixed flange; 11, end face flange; 12, outer cover; 13, grid hole; 14, sealing through pipe; 15, partition ring; 16, positioning hole; 17, positioning column. DETAILED DESCRIPTION

[0028] To further illustrate the embodiments, the present utility model provides drawings which are part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can explain the operating principle of the embodiments in cooperation with the related description of the specification. With reference to these contents, those skilled in the art should be able to understand other possible embodiments and advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0029] According to the embodiments of the present utility model, a buffer type piston flow regulating valve is provided.

[0030] The present utility model will be further illustrated in combination with the drawings and specific embodiments, such as Figures 1-7As shown, the buffer type piston flow regulating valve according to the embodiment of the utility model, including main valve body 1, this main valve body 1 inside is provided with inner container 2, and the one end of main valve body 1 away from inner container 2 is provided with liquid inlet valve body 3, and the inside of liquid inlet valve body 3 is provided with buffer assembly 4;The side of inner container 2 inside close to liquid inlet valve body 3 is provided with piston assembly 5, and the inside of inner container 2 is provided with transmission pipe body 6 in the middle position, and the inside of transmission pipe body 6 is provided with piston drive assembly 7 that cooperates with piston assembly 5;The side of inner container 2 inside away from liquid inlet valve body 3 is provided with squirrel cage 8;The circumferential outside of main valve body 1 is provided with external drive box 9.

[0031] By means of the above technical scheme, through the multiple structure combination of the buffer assembly 4, high-efficiency energy absorption characteristics are formed, which can rapidly absorb excess energy when the system is subjected to transient impact or pressure fluctuation, and smoothly regulate fluid flow rate; Not only effectively reduces the impact and vibration when the piston moves, reduces the noise and component wear caused by vibration, but also improves the accuracy and response speed of flow regulation. By integrating liquid inlet buffering, piston regulation and transmission driving functions, the compact arrangement of the internal structure of the regulating valve is realized; Each structure is connected to each other and has distinct levels, so that the overall regulating valve is not only small in size, but also stable in structure, which not only ensures the sealing of the fluid system, but also effectively prevents the problems of component loosening and wear caused by long-term use. At the same time, the modular design facilitates later maintenance and replacement, reduces system maintenance cost and downtime risk, and provides a solid structural guarantee for efficient and stable hydraulic control. Through the combination of worm gears, worms and bevel gears in the internal transmission pipe body, energy transmission from the drive motor 708 to the piston assembly 5 is realized.

[0032] In one embodiment, for the above-mentioned main valve body 1, the one end of main valve body 1 away from liquid inlet valve body 3 is provided with a fixed flange 10, and the one end of liquid inlet valve body 3 away from main valve body 1 is provided with an end face flange 11; The circumferential outside of liquid inlet valve body 3 is sleeved with an outer cover 12, thereby effectively isolating the external environment, protecting the internal components from corrosion and external impact, and ensuring the sealing of the entire system.

[0033] In one embodiment, for the above-mentioned buffer assembly 4, the buffer assembly 4 includes a sealing outer ring 401 arranged inside the liquid inlet valve body 3, a buffer orifice plate 402 arranged on the inner side of the sealing outer ring 401, a plurality of outer extension rods 403 arranged on the outer side of the sealing outer ring 401, a plurality of sliding grooves 404 arranged on the outer side of the liquid inlet valve body 3 and matched with the outer extension rods 403, and a buffer spring 405 arranged between the top side of the outer extension rod 403 and the inner side wall of the outer cover 12, thereby absorbing and relieving transient energy when impacted, reducing vibration and impact caused by pressure surge, balancing fluid power, ensuring smooth movement of the valve core, and prolonging the service life of the key components.

[0034] Specifically, the working principle of the buffer assembly 4: the sealed outer ring 401 is in contact with the fluid and guides the fluid to the buffer orifice plate 402, which reduces the impact velocity of the incoming fluid by limiting the flow rate, preventing excessive flow rate from causing vibration. The outer extension rod 403 moves in the sliding groove 404 outside the inlet valve body 3, so that the buffer spring 405 between the top end of the outer extension rod 403 and the inside of the outer cover 12 is compressed, providing additional buffering effect, further smoothing the fluid entering process, reducing the transient impact caused by pressure mutation.

[0035] In one embodiment, for the above-mentioned inner container 2, the end of the inner container 2 away from the inlet valve body 3 is fixedly connected with the main valve body 1, and a grid hole 13 cooperating with the squirrel cage 8 is formed on one side of the inner container 2, thereby helping to guide the fluid into a specific area and preventing foreign matter from entering the inner container, playing a filtering and protection role.

[0036] In one embodiment, for the above-mentioned piston assembly 5, the piston assembly 5 includes a piston head 501 arranged inside the inner container 2 near one end of the inlet valve body 3, a push threaded rod 502 arranged at the center of the inside of the piston head 501, and limit rods 503 arranged above and below the push threaded rod 502; the two limit rods 503 and the end of the push threaded rod 502 away from the piston head 501 both penetrate into the inside of the transmission pipe body 6, thereby making the piston head 501 have good directivity and stability during flow regulation, effectively improving the accuracy and response speed of flow regulation.

[0037] In one embodiment, for the above-mentioned piston drive assembly 7, the piston drive assembly 7 includes a worm gear bracket 701 arranged inside the transmission pipe body 6, a transmission worm gear 702 arranged at the middle position of the worm gear bracket 701 and threaded with the push threaded rod 502; a worm gear base 703 is arranged on one side of the inner bottom of the transmission pipe body 6, a transmission worm gear 704 is arranged on the top of the worm gear base 703 and cooperates with the transmission worm gear 702, the top end of the transmission worm gear 704 penetrates into the inside of the external drive box 9, and a driven bevel gear 705 is arranged at the top end of the transmission worm gear 704; a drive shaft 706 is arranged inside the external drive box 9, a drive bevel gear 707 is arranged on the circumferential outside of the drive shaft 706 and cooperates with the driven bevel gear 705, and a drive motor 708 is arranged on the outside of the external drive box 9 and cooperates with the drive shaft 706, thereby efficiently and stably transmitting external power to the piston head 501, achieving precise flow regulation, and reducing the wear problem caused by different force angles in the traditional connecting rod mechanism.

[0038] Specifically, the working principle of the piston driving assembly 7: the piston head 501 of the piston assembly is equipped with a push threaded rod 502, the push threaded rod 502 is controlled by a limiting rod 503 to be fixed in a stroke, and accurate movement of the piston assembly 5 in a specified range is ensured. The piston driving assembly 7 is installed inside the transmission pipe body 6, including a worm gear bracket 701, a transmission worm gear 702 and a transmission worm 704, etc., a transmission mechanism is formed, external power is transmitted to the push threaded rod 502, and the piston head is driven to move linearly. The driving of the whole piston driving assembly 7 is provided by the external driving box 9, power is transmitted from the external motor to the transmission worm 704 through the driving shaft 706, the driving bevel gear 707 and the driven bevel gear 705, and then the transmission worm gear 702 and the push threaded rod 502 are driven.

[0039] In one embodiment, for the above-mentioned main valve body 1, a sealing through pipe 14 matched with the transmission worm 704 is arranged between the inner wall of the main valve body 1 and the outer wall of the inner container 2; a partition ring 15 is arranged inside the inner container 2 between the piston head 501 and the transmission pipe body 6, a plurality of positioning holes 16 are arranged on the circumferential outer side of the partition ring 15, and a plurality of positioning columns 17 matched with the positioning holes 16 are arranged on the end face of the transmission pipe body 6, so that fluid leakage is effectively prevented, and coordinated movement between the inner container, the transmission pipe body and the driving mechanism is ensured, and the stability and maintenance convenience of the whole machine are greatly improved.

[0040] In order to facilitate the understanding of the above technical scheme of the utility model, the working principle or operation mode of the utility model in the actual process will be described in detail.

[0041] In actual application, when fluid enters the flow regulating valve from the pipeline, the fluid first passes through the liquid inlet valve body 3 and enters the inner container 2. Before entering, the fluid encounters the buffer assembly 4, which is located inside the liquid inlet valve body. The sealing outer ring 401 will contact the fluid and guide the fluid to the flow regulating hole plate 402, which reduces the impact speed of the inlet fluid by limiting the flow rate, preventing vibration caused by too fast flow. After the fluid passes through the buffer assembly, it enters the inner container 2 and contacts the piston assembly 5, which adjusts the flow rate according to the fluid demand. When the piston assembly 5 moves forward, the piston head 501 adjusts the position inside the inner container 2 through the push threaded rod 502, adjusts the opening of the valve, and accurately controls the flow of the fluid. At this time, the flow rate of the fluid will change according to the position change of the piston head 501, so as to realize the adjustment of the flow rate.

[0042] In summary, by means of the technical scheme of the utility model, through the multiple structure combination of the buffer assembly 4, a set of efficient energy absorption characteristics is formed, which can rapidly absorb excess energy when the system is subjected to transient impact or pressure fluctuation and stably regulate fluid flow rate; not only effectively reduces the impact and vibration during piston movement and reduces noise and component wear caused by vibration, but also improves the accuracy and response speed of flow regulation. In addition, the design of the outer cover 12 and the sealing outer ring 401 ensures good sealing of the system and prevents external corrosive media from entering, thereby greatly prolonging the service life of the device and ensuring long-term stable operation of the entire fluid pipeline network. By integrating liquid buffering, piston regulation and transmission driving functions, compact arrangement of the internal structure of the regulating valve is realized; the structures are connected to each other and have distinct levels, so that the regulating valve as a whole is not only small in size, but also stable in structure, which not only ensures the sealing of the fluid system, but also effectively prevents component loosening and wear problems caused by long-term use. At the same time, the modular design facilitates later maintenance and replacement, reduces system maintenance cost and downtime risk, and provides a solid structural guarantee for efficient and stable hydraulic control. Through the combination of the worm gear, the worm and the bevel gear in the internal transmission pipe body, energy transmission from the driving motor 708 to the piston assembly 5 is realized, and the threaded rod 502 and the limiting rod 503 are designed in threaded cooperation, so that the piston movement is more accurate, avoiding the local wear and uneven stress problems caused by inconsistent force angles in the traditional connecting rod mechanism. At the same time, the driving shaft 706 and the matching driving bevel gear 707 in the external driving box 9 can realize stable output of large torque, reduce the dependence on additional speed reducers, make the overall structure more simple, and make maintenance more convenient, effectively improving the overall economy and application universality of the device.

[0043] In the utility model, unless another definite provision and limitation, the terms "mount", "set", "connect", "fix", "screw" and so on should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through intermediate medium, can be the communication of two elements or the interaction relationship of two elements, unless another definite limitation, for the ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to specific circumstances.

[0044] The above only is the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement, improvement etc. that is made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A buffer type piston flow regulating valve comprising a main valve body (1) provided with an inner container (2) inside, characterized in that, The liquid inlet valve body (3) is internally provided with a buffer assembly (4); The inner container (2) is internally provided with a piston assembly (5) near one side of the liquid inlet valve body (3), and is internally provided with a transmission pipe body (6) at a middle position, and the transmission pipe body (6) is internally provided with a piston driving assembly (7) matched with the piston assembly (5); The inner container (2) is internally provided with a squirrel cage (8) away from one side of the liquid inlet valve body (3); The outer driving box (9) is arranged on the outer side of the main valve body (1).

2. A cushioned piston flow regulating valve according to claim 1, wherein The liquid inlet valve body (3) is internally provided with a buffer assembly (4); The liquid inlet valve body (3) is internally provided with a buffer assembly (4); 3. A cushioned piston flow regulating valve according to claim 1, wherein The buffer assembly (4) comprises a sealing outer ring (401) arranged in the liquid inlet valve body (3), a slow flow hole plate (402) is arranged on the inner side of the sealing outer ring (401), a plurality of outer extension rods (403) are arranged on the outer side of the sealing outer ring (401), a plurality of sliding grooves (404) matched with the outer extension rods (403) are formed on the outer side of the liquid inlet valve body (3), the top end of the outer extension rod (403) penetrates into the inside of the outer cover (12), and the buffer spring (405) is arranged between the top side of the outer extension rod (403) and the inner side wall of the outer cover (12).

4. The cushioned piston flow regulating valve of claim 1, wherein, The inner container (2) is fixedly connected with the main valve body (1) away from the liquid inlet valve body (3), and a grid hole (13) matched with the squirrel cage (8) is formed in one side of the inner container (2).

5. The cushioned piston flow regulating valve of claim 1, wherein, The piston assembly (5) comprises a piston head (501) arranged in the inner container (2) near one end of the liquid inlet valve body (3), a push threaded rod (502) is arranged at the inner side of the piston head (501), and a limiting rod (503) is arranged above and below the push threaded rod (502); The two limiting rods (503) and the push threaded rod (502) away from the piston head (501) penetrate into the inside of the transmission pipe body (6).

6. A cushioned piston flow regulating valve according to claim 5, wherein The piston driving assembly (7) comprises a worm gear bracket (701) arranged in the transmission pipe body (6), and a transmission worm gear (702) matched with the push threaded rod (502) is arranged at a middle position of the worm gear bracket (701). The bottom side of the transmission pipe body (6) is provided with a worm base (703), the top of the worm base (703) is provided with a transmission worm (704) matched with the transmission worm gear (702), the top end of the transmission worm (704) penetrates into the inside of the external drive box (9), and the top end of the transmission worm (704) is provided with a driven bevel gear (705), the inside of the external drive box (9) is provided with a driving shaft (706), the circumferential outside of the driving shaft (706) is sleeved with a driving bevel gear (707) matched with the driven bevel gear (705), and the outside of the external drive box (9) is provided with a driving motor (708) matched with the driving shaft (706).

7. A cushioned piston flow regulating valve according to claim 6, wherein The inner wall of the main valve body (1) and the outer wall of the inner container (2) are provided with a sealing through pipe (14) matched with the transmission worm (704); The inside of the inner container (2) is provided with a partition ring (15) between the piston head (501) and the transmission pipe body (6), a plurality of positioning holes (16) are formed in the circumferential outside of the partition ring (15), and the end face of the transmission pipe body (6) is provided with a plurality of positioning columns (17) matched with the positioning holes (16).

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