A speed-regulated rotary valve

Abstract

The application relates to the technical field of valves and discloses a speed-regulating rotary valve, which comprises a shell and a valve core rotatably arranged in the shell, the side surface of the valve core is provided with an annular mounting groove, and a sealing ring is arranged in the mounting groove; the sealing ring comprises a bearing part arranged in the mounting groove and two abutting parts distributed along the axial direction of the valve core, the abutting parts are located between the bearing part and the inner wall of the shell, the inner side of the abutting part is connected with the bearing part, the outer side of the abutting part extends in the direction of the other abutting part and is inclined, and the outer end surface of the abutting part elastically abuts against the inner wall of the shell; the outer wall of the bearing part, the inner wall of the shell and the inner side walls of the two abutting parts jointly form an annular collecting cavity, and the annular collecting cavity is used for collecting wear debris generated by the relative rotation between the sealing ring and the inner wall of the shell; the speed-regulating rotary valve has the effects of improving the sealing performance of the valve and the operation stability of the valve.

Description

A speed-regulating rotary valve Technical Field

[0001] This invention relates to the technical field of valves, and more specifically to a speed-regulating rotary valve. Background Technology

[0002] Pressure Swing Adsorption (PSA) is a technology used to separate gas mixtures and is now widely used in petroleum, chemical, metallurgical, electronics, food, and environmental protection industries. Its main advantages over cryogenic gas separation lie in its high degree of automation, simple operation, immediate usability, and the fact that the equipment requires no levelness and can operate normally even in vibrating or swaying environments. PSA technology utilizes the selective adsorption properties of molecular sieves and the principle that their adsorption capacity increases with increasing pressure and decreases with decreasing pressure to perform gas separation. Traditional technologies use timed switching of programmed valves to control gas flow, enabling the adsorption tower to complete periodic pressurization and depressurization desorption processes.

[0003] Patent document CN115306921B discloses a rotary valve, which includes: a valve body, which is a cylindrical structure, with three flow channel groups inside the valve body, the ports of the three flow channel groups being disposed on the surface of the valve body; and a valve sleeve, which is coaxially sealed outside the valve body, the valve sleeve having multiple through holes evenly distributed, each through hole having an inner end extending to form a vertical groove, the vertical groove being divided into three sections along the vertical direction corresponding to the ports of different flow channel groups respectively, a switching valve being provided at the through hole, the switching valve connecting the through hole to the two sections of the vertical groove, which can switch the corresponding two flow channel groups to the working state, the valve body rotating relative to the valve sleeve around the axis, so that the multiple through holes are combined and connected with the ports of the two flow channel groups in the working state, thereby changing the process operation mode, and switching to other flow channel groups when the flow channel groups are worn or otherwise damaged.

[0004] However, this solution still has the following problems: Although the technology can switch to a backup flow channel group in a timely manner when the flow channel group wears out through the flow channel group switching mechanism, thus alleviating the performance degradation problem of rotating parts during long-term operation, in actual operation, the debris and residue generated by the gradual wear of the rubber pads will continue to remain inside the device. These debris not only interfere with the fitting accuracy between each flow channel group and the sealing structure, leading to a decrease in sealing performance, but also easily accumulate in hidden parts such as flow channel gaps and sealing surfaces, causing great inconvenience for subsequent cleaning and maintenance, and thus affecting the overall operational stability and service life of the device. Summary of the Invention

[0005] This invention provides a speed-regulating rotary valve, which aims to solve the problem in related technologies where flow channel switching cannot eliminate wear residues, leading to decreased sealing and difficulty in cleaning.

[0006] The speed-regulating rotary valve of the present invention includes a housing and a valve core rotatably assembled within the housing. The valve core has an annular mounting groove on its side, and a sealing ring is disposed within the mounting groove. The sealing ring includes a receiving portion fitted within the mounting groove and two abutting portions spaced apart along the axial direction of the valve core. The abutting portions are located between the receiving portion and the inner wall of the housing. The inner side of the abutting portion is connected to the receiving portion, and the outer side extends obliquely toward the other abutting portion. The outer end face of the abutting portion elastically abuts against the inner wall of the housing. The outer wall of the receiving portion, the inner wall of the housing, and the inner side walls of the two abutting portions together form an annular collecting cavity, which is used to collect wear debris generated by the relative rotation of the sealing ring and the inner wall of the housing.

[0007] Its effect lies in the fact that, by setting a sealing ring with two spaced abutment parts, wear debris generated by the sealing ring as it rotates with the valve core can be collected. Specifically, in the initial state, the inner side of the abutment part connects to the receiving part in the mounting groove, and the outer side abuts against the inner wall of the housing, thereby achieving a seal at the fit between the valve core and the housing. When the valve core rotates, it will drive the abutment part to rotate as well. Since the two abutment parts are inclined in the direction towards each other, an annular collection cavity is formed between the two abutment parts, the receiving part, and the housing. Debris generated by the abutment parts due to wear will fall into the annular collection cavity, thereby collecting the wear debris and preventing the debris from accumulating in hidden parts such as the flow channel gap and sealing surface. At the same time, it facilitates the subsequent centralized cleaning of debris, improving the valve's sealing and operational stability.

[0008] Preferably, the receiving part is provided with an annular cavity; the valve core is provided with an air supply channel communicating with the annular cavity, and the air supply channel is connected to an external air supply device; air is supplied to the annular cavity through the air supply channel, causing the receiving part to expand and open, and simultaneously driving the abutting part to move towards the inner wall of the housing, so that the abutting part abuts against the inner wall of the housing.

[0009] Its effect is that, by setting up an air supply device connected to the annular cavity, when the valve is working, air is introduced into the annular cavity through the air passage, causing the receiving part to expand under the action of air pressure, and driving the abutting part to move towards the inner wall of the shell until the abutting part abuts against the inner wall of the shell, so as to ensure the sealing between the abutting part and the inner wall of the shell. At the same time, when the abutting part is worn, the abutting part will maintain a continuous abutting state against the inner wall of the shell under the action of the receiving part, so as to eliminate the impact of wear and ensure the overall sealing effect.

[0010] Preferably, a chip discharge port communicating with the annular collection chamber is provided at the bottom of the housing.

[0011] Its effect is that the debris in the annular collection chamber will be discharged through the debris discharge port, so as to remove the debris in the annular collection chamber in a timely manner, avoid excessive accumulation of debris in the annular collection chamber, and improve the overall operational stability.

[0012] Preferably, the two abutting parts abut against the inner walls of the housing on both sides of the chip discharge port.

[0013] Its effect is that by setting the abutment part to abut against the inner wall of the housing on both sides of the chip discharge port, the chip discharge port and the annular collection chamber are completely aligned, that is, the two abutment parts do not contact the chip discharge port, thus preventing the valve core and the housing from communicating with the outside through the chip discharge port, so as to ensure the sealing effect of the sealing ring.

[0014] Preferably, the mounting groove includes: a support portion that mates with the receiving portion and a guide portion that mates with the abutting portion. Two guide portions are provided and located on both sides of the support portion. The two guide portions are inclined on the side away from the support portion in the direction toward each other. The abutting portion and the guide portion are slidably engaged.

[0015] Its effect is that by setting the support part and the receiving part to cooperate, the sealing between the receiving part and the support part is ensured. At the same time, the guide part and the abutting part are set to cooperate, so that the abutting part is kept in an inclined state to prevent the generated debris from falling into the annular collection chamber.

[0016] Preferably, the cross-section of the support part is set to an arc shape, so that the support part corresponds to the outer side of the supported receiving part.

[0017] The effect is that by setting the support part to be arc-shaped, when the receiving part expands, the receiving part can fully fit with the support part after expansion, thereby improving the sealing between the two.

[0018] Preferably, multiple mounting grooves are arranged along the axial direction of the valve core, and multiple sealing rings are synchronously and correspondingly provided with the multiple mounting grooves.

[0019] Preferably, the gas supply channel includes: a connecting part that communicates with an external gas supply device, and an intermediate part that communicates with a receiving part. Multiple intermediate parts are arranged along the axial direction of the valve core, and the intermediate parts communicate with the connecting part. Each of the multiple intermediate parts corresponds to a multiple sealing ring.

[0020] Its effect is that by supplying air through multiple intermediate sections, the receiving parts of multiple sealing rings can be expanded simultaneously, ensuring that multiple abutting parts remain in contact with the inner wall of the housing. At the same time, the multiple intermediate sections are connected to the connecting parts, which ensures that the air pressure on each receiving part is consistent, thereby making the pressure applied to the inner wall of the housing by multiple abutting parts uniform and improving the overall sealing effect.

[0021] Preferably, a rubber tube communicating with the annular cavity is provided on the inner side of the receiving part, and the rubber tube is inserted into the middle part.

[0022] The effect is that by setting a rubber tube on the receiving part, the receiving part can be connected to the middle part through the rubber tube when it is placed in the mounting groove, thus improving the ease of assembly.

[0023] Preferably, multiple chip discharge ports are arranged along the axial direction of the valve core, and each of the multiple chip discharge ports corresponds to a multiple annular collection chamber.

[0024] Its effect is that the debris in the corresponding annular collection chamber can be discharged separately through multiple chip discharge ports, and the multiple annular collection chambers do not interfere with each other, ensuring that the debris in each place can be discharged in a timely manner.

[0025] Beneficial effects:

[0026] This invention provides two abutment portions on the sealing ring, forming an annular collection cavity between the receiving portion, the abutment portion, and the inner wall of the housing. The abutment portions on each sealing ring are arranged in an inward V-shape, allowing the debris generated when the abutment portions on the sealing ring wear down with the valve core during rotation to fall into the annular collection cavity and be discharged through the debris discharge port. This ensures that the debris generated by wear is discharged in a timely manner, preventing secondary wear on other parts and guaranteeing the overall sealing performance and operational stability of the valve. Attached Figure Description

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention.

[0028] Figure 2 is a schematic diagram of the internal structure of the valve in this invention.

[0029] Figure 3 is a schematic diagram showing the positional relationship between the sealing ring and the annular flow channel in this invention.

[0030] Figure 4 is a schematic diagram of the structure at point A in Figure 3.

[0031] Figure 5 is a schematic diagram of the gas supply channel in this invention.

[0032] Figure 6 is a schematic diagram of the structure at point B in Figure 5.

[0033] Figure 7 is a schematic diagram of the chip discharge port in this invention.

[0034] Figure 8 is a schematic diagram of the structure of the rubber cannula in this invention.

[0035] Figure label:

[0036] 1. Housing; 11. First interface; 12. Second interface; 2. Valve core; 21. Air supply channel; 211. Connecting part; 212. Middle part; 22. Internal channel; 23. Annular flow channel; 24. Auxiliary air supply pipe; 3. Mounting groove; 31. Support part; 32. Guide part; 4. Sealing ring; 5. Receiving part; 51. Annular cavity; 6. Abutting part; 7. Annular collection chamber; 8. Chip discharge port; 9. Rubber tube. Detailed Implementation

[0037] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] As shown in Figures 1 to 8, the speed-regulating rotary valve of the present invention is composed of two key components: a housing 1 and a valve core 2. The valve core 2 is rotatably assembled in the valve cavity inside the housing 1, forming a seal and being able to move relative to each other. This can effectively prevent gas leakage during transmission and ensure that the valve core 2 can rotate smoothly within the housing 1. Multiple annular flow channels 23 are machined circumferentially on the side of the valve core 2. The flow channels are arranged in an orderly manner along the axial direction of the valve core 2, and the flow channel size and sealing accuracy are matched to the working conditions of gas transmission. Correspondingly, multiple first interfaces 11 and second interfaces 12 are integrated on the housing 1. The multiple first interfaces 11 are concentrated on the side of the housing 1, and the opening position and number of each first interface 11 form a precise matching relationship with the multiple annular flow channels 23 on the valve core 2. The second interface 12 is located at the end of the housing 1. An internal channel 22 is opened through the inside of the valve core 2. One end of the internal channel 22 is seamlessly connected to the annular flow channel 23, and the other end extends towards the second interface 12 of the housing 1 and forms a positional correspondence with it, thereby constructing a potential gas transmission path from the first interface 11 of the housing 1 through the annular flow channel 23 and the internal channel 22 of the valve core 2 to the second interface 12 of the housing 1.

[0039] During operation, the valve core 2 rotates around its own axis, thereby changing the relative position of the internal channel 22 of the valve core 2 and the second interface 12 of the housing 1. This controls the internal channel 22 at different positions to form an effective correspondence or a complete offset from the second interface 12, so that the connected annular flow channels 23 are in a connected or disconnected working state respectively. With the help of this rotation control mechanism, it is possible to flexibly switch the direction of multiple gas flows and accurately control the transmission flow rate. Finally, it can stably output the gas pressure and flow rate signals required for the periodic pressurization adsorption condition, providing reliable gas transmission guarantee for the adsorption tower and ensuring that the adsorption tower can complete the cycle of adsorption and desorption in a strict manner according to the preset process procedure, efficiently and stably.

[0040] Referring to Figures 2, 3, and 4, in order to achieve a reliable seal between the valve core 2 and the valve cavity of the housing 1 and to effectively isolate adjacent annular flow channels 23, several annular mounting grooves 3 are machined circumferentially on the side of the valve core 2. These mounting grooves 3 are arranged linearly at equal intervals along the axial direction of the valve core 2, and the opening position of each mounting groove 3 precisely corresponds to the interval area between two adjacent annular flow channels 23 on the valve core 2 body. This ensures that there are mounting grooves 3 on both sides of each annular flow channel 23, while ensuring that the mounting grooves 3 do not obstruct or interfere with the flow cross section of the annular flow channel 23. In addition, a matching sealing ring 4 is embedded in each mounting groove 3. The number of sealing rings 4 corresponds one-to-one with the number of mounting grooves 3. The sealing ring 4 is fitted inside the mounting groove 3, and its outer circumferential surface forms a tight interference fit with the inner wall of the valve cavity of the housing 1. At the same time, its inner circumferential surface makes full and reliable contact with the bottom of the mounting groove 3, so as to build a continuous and stable sealing barrier at the mating gap between the valve core 2 and the housing 1. This sealing barrier can completely cover the mating surface gap between the valve core 2 and the housing 1, thereby effectively blocking the path of gas leakage from the mating surface gap between the valve core 2 and the housing 1, and greatly improving the overall sealing performance of the valve core 2 assembly.

[0041] Meanwhile, since each sealing ring 4 is precisely positioned in the interval area between two adjacent annular flow channels 23 through the corresponding annular mounting groove 3, its radial sealing effect not only achieves the sealing between the valve core 2 and the housing 1, but also forms a complete physical isolation between the two adjacent annular flow channels 23. This completely avoids the problem of gas in different annular flow channels 23 flowing across or interfering with each other during transmission through the fit gap between the valve core 2 and the housing 1. It ensures that each gas can be independently and stably transported along its corresponding preset annular flow channel 23, without gas mixing or pressure interference between the channels. This provides a solid and reliable sealing guarantee for subsequent changes in the connection relationship of the annular flow channels 23 by rotating the valve core 2 to achieve precise switching of gas flow direction and precise control of transmission flow, effectively improving the working stability and control accuracy of the valve assembly.

[0042] Referring to Figures 4, 5, and 6, the sealing ring 4 includes a receiving part 5 and an abutting part 6. The receiving part 5 and the abutting part 6 adopt an integrated structural design. The receiving part 5 is fitted into the mounting groove 3. There are two abutting parts 6, and the two abutting parts 6 are arranged at intervals along the axial direction of the valve core 2. That is, the abutting parts 6 are located on both sides of the receiving part 5. The abutting part 6 is located at the annular gap between the receiving part 5 and the inner wall of the housing 1. Its inner side is connected to the outer wall of the receiving part 5, and its outer side extends obliquely towards the other abutting part 6. That is, the outer sides of the two abutting parts 6 are arranged in an inward V-shape. The outer end face of the abutting part 6 abuts against the inner wall of the housing 1 to form a reliable sealing contact interface.

[0043] Referring to Figures 3, 4, 5, and 6, in the structural layout of the sealing ring 4, a closed annular collection cavity 7 with a certain accommodating space is formed by the outer wall of the receiving part 5, the inner wall of the housing 1, and the opposing inner sidewalls of the two abutting parts 6. This annular collection cavity 7 serves as a storage area for wear debris, and its core function is to collect the wear debris generated during the operation of the sealing ring 4.

[0044] When the sealing ring 4 rotates with the valve core 2 relative to the inner wall of the housing 1, the outer end face of the abutment part 6 will inevitably rub against the inner wall of the housing 1, generating tiny wear debris. If this debris spreads freely, it may not only enter the sealing mating surface and damage the sealing performance, but may also intrude into other transmission or sealing components of the equipment, causing malfunctions such as jamming and additional wear. By tilting the two abutment parts 6, when wear occurs, the debris will fall into the collection chamber, or be guided into the annular collection chamber 7 by the tilted abutment parts 6, achieving rapid collection of debris. At the same time, the closed annular collection chamber 7 structure can effectively limit the diffusion range of debris, ensuring that the debris is always stably stored in the chamber, preventing debris from entering between the valve core 2 and the housing 1, or remaining between the abutment part 6 and the housing 1. This fundamentally avoids the adverse effects of debris on sealing performance and equipment operating stability, significantly improving the service life and operational reliability of the sealing ring 4.

[0045] Referring to Figures 5 and 6, the receiving part 5 and the abutting part 6 are manufactured using an integral molding process. Both are made of rubber material with good elastic deformation capability. This rubber material is the same as that used in conventional sealing rings. Its specific composition, performance parameters, and other related information are common knowledge to those skilled in the art and will not be described in detail here. The receiving part 5 has an annular cavity 51 inside. The annular cavity 51 is arranged in a ring around the center of the receiving part 5, that is, the receiving part 5 is a hollow structure as a whole. Correspondingly, an air supply channel 21 is provided inside the valve core 2 body. One end of the air supply channel 21 is continuously connected to the annular cavity 51 of the receiving part 5, and the other end passes through the valve core 2 body and extends to the outside of the valve core 2. The port of the extended end of the air supply channel 21 is provided with a sealing connection structure, so that the air supply channel 21 can achieve an efficient and reliable sealing connection with the output end of the external air supply device. Specifically, the external air supply device is a compressor, which is used to supply air to the annular cavity 51 through the air supply channel 21. An auxiliary air supply pipe 24 is provided on the housing 1. The auxiliary air supply pipe 24 is coaxially and fixedly connected to the valve core 2, that is, the auxiliary air supply pipe 24 can rotate synchronously with the valve core 2. The auxiliary air supply pipe 24 is connected to the air supply channel 21, that is, the air supply channel 21 is connected to the external air supply device through the auxiliary air supply pipe 24.

[0046] During operation, the contact part 6 needs to form a tight contact with the inner wall of the housing 1. By activating the external gas supply device, gas is stably delivered to the annular cavity 51 of the receiving part 5 through the gas supply channel 21. As the gas pressure in the cavity gradually increases, it will form a uniform radial outward thrust on the inner wall of the receiving part 5, causing the receiving part 5 to undergo elastic deformation of radial expansion. Since the receiving part 5 and the contact part 6 are integrally formed, this elastic deformation will be synchronously transmitted to the contact part 6 through the connection between the two, thereby driving the contact part 6 to produce a precise directional movement in the direction closer to the inner wall of the housing 1. After the contact part 6 is in complete contact with the inner wall of the housing 1, the gas pressure in the cavity is maintained, so that a stable, tight and uniform contact relationship is formed between the contact part 6 and the inner wall of the housing 1, thereby achieving the corresponding sealing or positioning function.

[0047] During subsequent use, the abutting part 6, under the continuous elastic thrust transmitted by the receiving part 5, always maintains a tight abutting state with the inner wall of the housing 1. In addition, the abutting part 6 itself is made of a highly elastic and wear-resistant elastic material, and is always in a reasonable compressed state under the mating state. Even if the abutting part 6 is worn to a certain extent due to friction during long-term use, its own elastic recovery ability can compensate for the wear in time, ensuring that the abutting part 6 always maintains a tight abutting state with the inner wall of the housing 1, fundamentally guaranteeing the long-term stability and reliability of the sealing performance between the valve core 2 and the housing 1.

[0048] Referring to Figures 2, 3, 4, and 7, a chip discharge port 8 is provided through the housing 1. The chip discharge port 8 is located in the bottom area of ​​the housing 1 and corresponds to the lowest position of the annular collection cavity 7. The chip discharge port 8 serves as a chip discharge channel to ensure that the debris in the collection cavity can smoothly enter the chip discharge port 8 and be discharged from the annular collection cavity 7.

[0049] When the valve core 2 rotates within the housing 1, causing the contact part 6 to move relative to the housing 1, the generated debris falls into the annular collection chamber 7. The debris entering the annular collection chamber 7 settles naturally towards the bottom of the chamber due to its own gravity and gradually accumulates, continuously moving towards the chip discharge port 8, and finally being discharged through the chip discharge port 8. The chip discharge port 8 enables timely and automatic cleaning of debris, effectively preventing excessive accumulation of debris in the annular collection chamber 7 and its re-entry into the mating gap between the contact part 6 and the housing 1 during the rotation of the valve core 2. This fundamentally eliminates the risk of debris damaging the sealing of the mating surfaces, significantly improving the stability and reliability of the sealing structure between the valve body and the housing 1.

[0050] The two abutting parts 6 respectively abut against the inner wall of the housing 1 on both sides of the chip discharge port 8, which can form a stable structural support to ensure that the chip discharge port 8 and the annular collection chamber 7 are always unobstructed, and ensure that the debris in the collection chamber can smoothly enter the chip discharge port 8 for discharge. At the same time, through this cooperation, an effective isolation barrier can be built between the chip discharge port 8 and the mating area of ​​the valve core 2 and the housing 1, so as to block the communication path between the chip discharge port 8 and the mating gap of the valve core 2 and the housing 1. Structurally, it prevents the precision mating part between the valve core 2 and the housing 1 from communicating with the external environment through the chip discharge port 8, thereby effectively preventing external impurities from entering the mating gap through the chip discharge port 8, and ensuring that the sealing and stability of the mating structure between the valve core 2 and the housing 1 are not affected by the setting of the chip discharge port 8.

[0051] Referring to Figures 2 and 3, multiple chip discharge ports 8 are provided, and these multiple chip discharge ports 8 are continuously arranged along the axial direction of the valve core 2. The multiple chip discharge ports 8 are corresponding one-to-one with multiple annular collection chambers 7. Each chip discharge port 8 and the annular collection chamber 7 pre-set on the outer periphery of the valve core 2 form a one-to-one spatial matching relationship. That is, each chip discharge port 8 is connected to the annular collection chamber 7 at the corresponding position. This one-to-one connection design can make each annular collection chamber 7 form an independent and non-interfering structural unit. At the same time, the chip discharge ports 8 can guide the accumulated chips in the corresponding annular collection chamber 7 to be discharged in time, effectively avoiding problems such as valve core 2 jamming or reduced operating accuracy caused by chip accumulation in the annular collection chamber 7. This ensures the stability and reliability of the valve core 2 during the overall operation.

[0052] Referring to Figures 5 and 6, the air supply channel 21 includes a connecting part 211 and an intermediate part 212. The connecting part 211 is connected to the intermediate part 212 and the external air supply device. The intermediate part 212 is adapted to the receiving part 5 on the sealing ring 4. The intermediate part 212 is arranged continuously along the axial direction of the valve core 2. One end of the intermediate part 212 is in a stable communication state with the connecting part 211, and the other end is in a one-to-one correspondence and communication with each sealing ring 4. Specifically, each intermediate part 212 is reliably connected to the receiving part 5 on the corresponding sealing ring 4.

[0053] When the external air supply device delivers airflow through the air supply channel 21, the airflow can be diverted to each intermediate part 212 via the connecting part 211 and simultaneously delivered to the corresponding receiving part 5, thereby pushing the abutting part 6 on each sealing ring 4 to form a tight abutment with the inner wall of the housing 1. At the same time, the receiving part 5 of each sealing ring 4, through the integrated connecting structure formed by the intermediate part 212 and the connecting part 211, can ensure that the air pressure on the inner wall of each receiving part 5 remains consistent, thereby making the abutting force applied by the abutting part 6 of each sealing ring 4 to the inner wall of the housing 1 evenly distributed, effectively avoiding the problem of excessive or insufficient local sealing pressure, and ultimately achieving a uniform improvement in the overall sealing performance, ensuring that the sealing effect of the device reaches the optimal state.

[0054] Referring to Figures 6, 7, and 8, a rubber tube 9 is integrally formed on the inner side of the receiving part 5. The rubber tube 9 is made of rubber, and one end of it is connected to the pre-set annular cavity 51 inside the receiving part 5. The other end is directly inserted into the middle part 212 of the air supply channel 21, and forms an interference fit connection with the inner wall of the middle part 212. This interference fit design can ensure the basic sealing effect between the rubber tube 9 and the middle part 212 in the initial assembly state, and avoid intermittent leakage problems.

[0055] When the external air supply device starts the air supply program, the high-pressure airflow will first flow through the connecting part 211 of the air supply channel 21, and then be diverted to each intermediate part 212 arranged along the axis of the valve core 2. Then, through the rubber tube 9 inserted in the intermediate part 212, it will finally be smoothly delivered to the annular cavity 51 of the receiving part 5. As the high-pressure airflow continues to fill the annular cavity 51, the receiving part 5 will undergo uniform and controllable expansion deformation under the action of air pressure, thereby driving the outer abutment part 6 to form a tight fit with the inner wall of the housing 1. At the same time, the high-pressure airflow flowing through the rubber tube 9 will also generate outward pressure on the rubber tube 9, causing the outer peripheral wall of the rubber tube 9 to expand adaptively. This expansion effect can further eliminate any small gaps that may exist between the rubber tube 9 and the inner wall of the intermediate part 212, so that the contact surface of the two forms a sealed state without dead angles, greatly improving the sealing performance and reliability of the air circuit connection.

[0056] In addition, the rubber tube 9 is pre-installed inside the receiving part 5. When assembling the sealing ring 4, the operator only needs to align the rubber tube 9 with the port of the middle part 212 and insert it to quickly complete the precise docking between the receiving part 5 and the air supply channel 21 without the need for additional positioning fixtures. This simplifies the assembly process, improves assembly efficiency, and ensures that the receiving part 5 and the external air supply device always maintain a stable and unobstructed airflow path, providing a reliable air source guarantee for the subsequent synchronous expansion and sealing of the sealing ring 4.

[0057] Referring to Figures 4 and 6, the inner wall of the mounting groove 3 includes a support portion 31 and a guide portion 32. There are two guide portions 32, which are symmetrically arranged on both sides of the support portion 31. The guide portions 32 are located on the side of the support portion 31 away from the axis of the valve core 2. Both guide portions 32 are inclined and extend towards each other on the side away from the support portion 31. The abutting portion 6 fits against the guide portion 32, and the inclination direction of the abutting portion 6 is the same as that of the guide portion 32. The abutting portion 6 and the guide portion 32 slide together.

[0058] The cross-section of the support part 31 is set as an arc shape that matches the outer contour of the receiving part 5. This ensures that when the receiving part 5 expands during inflation, its outer surface can fully and tightly fit against the arc-shaped surface of the support part 31, significantly increasing the contact area and tightness of the fit. This effectively guarantees the sealing of the mating structure between the receiving part 5 and the support part 31, fundamentally preventing leakage of the medium at the mating gap between the receiving part 5 and the support part 31. At the same time, the guide parts 32, which are inclined on both sides, can precisely guide and limit the installation posture of the abutment part 6 through their cooperation with the abutment part 6. This ensures that the abutment part 6 always maintains an inclined state that matches the inclination angle of the guide parts 32. This inclined arrangement can guide the debris generated during the mating of the valve core 2 and the housing 1 to naturally slide into the annular collection chamber 7, providing a reliable structural guarantee for the efficient collection and discharge of subsequent debris.

[0059] The implementation principle of this invention is as follows: When the rotary valve enters the working state, the external air supply device continuously supplies gas to the annular cavity 51 of the receiving part 5 on the side of the valve core 2 through the preset air supply channel 21. As the air pressure inside the annular cavity 51 gradually increases, the receiving part 5 undergoes elastic expansion deformation, thereby pushing the outer abutment part 6 to fit tightly against the inner wall of the housing 1. The abutment part 6 always maintains the same tilt angle as the guide part 32 on the receiving part 5, thereby ensuring the sealing and stability of the fit. When the valve core 2 is driven to rotate, it will synchronously drive the abutment part 6 to rotate. During this process, the abutment part 6 and the inner wall of the valve body always maintain a tight abutment, thereby forming a reliable dynamic seal for the fit gap between the valve core 2 and the valve body, effectively avoiding the problem of medium leakage.

[0060] When the contact part 6 generates debris due to wear during long-term rotational friction, the debris will naturally fall into the pre-set annular collection chamber 7 at the bottom of the valve body under the action of gravity. Subsequently, the debris gradually gathers in the annular collection chamber 7 towards the pre-set chip discharge port 8, and is finally discharged from the valve body in a timely manner through the chip discharge port 8. Through this design of debris collection and discharge structure, the accumulation of debris generated by the wear of the sealing ring 4 in hidden critical parts such as the flow channel gap and sealing surface can be effectively reduced. This not only eliminates secondary wear caused by debris accumulation and ensures the sealing surface fit accuracy, but also greatly improves the convenience of debris cleaning, thereby maintaining the overall sealing performance and operational stability of the rotary valve in the long term.

[0061] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A speed-regulating rotary valve, comprising a housing (1) and a valve core (2) rotatably mounted within the housing (1), characterized in that, The valve core (2) has an annular mounting groove (3) on its side, and a sealing ring (4) is provided in the mounting groove (3). The sealing ring (4) includes a receiving part (5) fitted in the mounting groove (3) and two abutting parts (6) spaced apart along the axial direction of the valve core (2). The abutting part (6) is located between the receiving part (5) and the inner wall of the housing (1). The inner side of the abutting part (6) is connected to the receiving part (5), and the outer side extends obliquely toward the other abutting part (6). The outer end face of the abutting part (6) is elastically abutted against the inner wall of the housing (1). The outer wall of the receiving part (5), the inner wall of the housing (1), and the inner side walls of the two abutting parts (6) together form an annular collection cavity (7). The annular collection cavity (7) is used to collect wear debris generated by the relative rotation of the sealing ring (4) and the inner wall of the housing (1).

2. The speed-regulating rotary valve according to claim 1, characterized in that, The receiving part (5) is provided with an annular cavity (51); the valve core (2) is provided with an air supply channel (21) that communicates with the annular cavity (51), and the air supply channel (21) is connected to an external air supply device; air is supplied into the annular cavity (51) through the air supply channel (21), causing the receiving part (5) to expand and open, and simultaneously driving the abutting part (6) to move towards the inner wall of the housing (1), so that the abutting part (6) abuts against the inner wall of the housing (1).

3. The speed-regulating rotary valve according to claim 1, characterized in that, The shell (1) has a chip discharge port (8) that communicates with the annular collection chamber (7) at the bottom.

4. The speed-regulating rotary valve according to claim 3, characterized in that, The two contact parts (6) abut against the inner wall of the shell (1) on both sides of the chip discharge port (8).

5. The speed-regulating rotary valve according to claim 2, characterized in that, The mounting groove (3) includes: a support (31) that cooperates with the receiving part (5) and a guide (32) that cooperates with the abutting part (6). There are two guides (32) located on both sides of the support (31). The two guides (32) are inclined in the direction towards each other on the side away from the support (31). The abutting part (6) and the guide (32) are in sliding cooperation.

6. The speed-regulating rotary valve according to claim 5, characterized in that, The cross section of the support part (31) is set to be arc-shaped, so that the support part (31) corresponds to the outer side of the supported receiving part (5).

7. The speed-regulating rotary valve according to claim 3, characterized in that, Multiple mounting slots (3) are arranged along the axial direction of the valve core (2), and multiple sealing rings (4) are synchronously and correspondingly provided with multiple mounting slots (3).

8. The speed-regulating rotary valve according to claim 7, characterized in that, The gas supply channel (21) includes: a connecting part (211) that communicates with an external gas supply device and an intermediate part (212) that communicates with a receiving part (5). Multiple intermediate parts (212) are arranged along the axial direction of the valve core (2). The intermediate parts (212) communicate with the connecting part (211). Multiple intermediate parts (212) are corresponding to multiple sealing rings (4).

9. The speed-regulating rotary valve according to claim 8, characterized in that, The receiving part (5) is provided with a rubber tube (9) that communicates with the annular cavity (51) and the rubber tube (9) is inserted into the middle part (212).

10. The speed-regulating rotary valve according to claim 7, characterized in that, Multiple chip discharge ports (8) are arranged along the axial direction of the valve core (2), and each chip discharge port (8) corresponds to a multiple annular collection chamber (7).

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