A shield structure, valve and pump

Abstract

The application provides a shielding structure, a valve and a pump, and the shielding structure comprises: a mounting base with a mounting hole; a sliding rod inserted into the mounting hole and capable of sliding along the axial direction of the mounting hole and rotating in the circumferential direction; and an elastic sleeve mounted on the outside of the sliding rod and located on one side of the mounting base, with one end of the elastic sleeve being airtightly mounted on the sliding rod and the other end of the elastic sleeve being airtightly mounted to the mounting base and located on the outside of the mounting hole; and the space surrounded by the elastic sleeve, the sliding rod and the mounting base is filled with a lubricating medium. The shielding structure can realize efficient sliding sealing and avoid medium leakage. The elastic sleeve can cover the sliding rod and the like, slow down the impact of medium flow on the sliding rod and the like, and reduce the wear of the sliding rod and the like. The ductility of the elastic sleeve is good, so that the sliding rod can rotate and slide more flexibly, and the impact of torsional force on the sliding rod is slowed down. Meanwhile, a hard rubber sleeve is mounted at the mounting hole, so that the elastic sleeve can be prevented from flowing out from the gap between the valve rod and the valve cover when the elastic sleeve is pressed.

Description

Technical Field

[0001] This invention relates to the field of sliding seals, and more specifically, to a shielding structure, a valve, and a pump. Background Technology

[0002] Conventionally designed control valves often experience material leakage during use due to packing wear, resulting in losses for businesses and failing to meet environmental protection requirements. This is especially true when the medium is toxic, corrosive, flammable, or explosive, as leakage can endanger human lives.

[0003] Therefore, how to propose a structure for valve sealing with better sealing effect has become an urgent problem to be solved. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] Therefore, one object of the present invention is to provide a shielding structure.

[0006] Another object of the present invention is to provide a valve including the above-described shielding structure.

[0007] Another object of the present invention is to provide a pump including the above-described shielding structure or the above-described valve.

[0008] To achieve the above objectives, the present invention provides a shielding structure, comprising: a mounting base having a mounting hole; a sliding rod inserted into the mounting hole and capable of sliding along the axial direction and / or rotating along the circumferential direction of the mounting hole; and an elastic sleeve fitted over the sliding rod, located on one side of the mounting base, one end of the elastic sleeve being airtightly mounted on the sliding rod, and the other end of the elastic sleeve being airtightly mounted to the mounting base (mainly mounted on the inner side of the mounting base, i.e., the side in contact with gas, etc., but it can also be on the outer side, i.e., providing a reverse seal to the mounting hole from the outside), and located outside the mounting hole; wherein, a lubricating medium is filled between the elastic sleeve, the sliding rod, and the mounting base.

[0009] The elastic sleeve is a flexible component, meaning it has a relatively soft structure. For example, it can be made of elastic rubber or similar materials. In other words, the elastic sleeve is preferably made of flexible materials. The elastic sleeve can be made with fabric or without fabric.

[0010] When the outer side of the elastic sleeve is subjected to force, the elastic sleeve can transmit the force to the mounting base and / or sliding rod, so that the pressure can be borne by the mounting base and / or sliding rod. That is, when the outer side of the elastic sleeve is subjected to force, it can bear the pressure with the help of the mounting base and / or sliding rod, so that the elastic sleeve does not need to bear pressure like a bellows. Therefore, the elastic sleeve has a longer service life and is less prone to damage, thus solving a series of problems existing in the current solution of sealing with bellows.

[0011] Furthermore, the lubricating medium is a lubricating film formed on the inner wall of the elastic sleeve, that is, a relatively thin film, such as an oil film or liquid film, is formed on the inner wall of the elastic sleeve. Specifically, the lubricating medium is applied to the mating surface of the elastic sleeve and the sliding rod, that is, the lubricating medium is applied to the innermost wall of the elastic sleeve, meaning a thin layer of lubricating oil or other medium is attached to the innermost wall of the elastic sleeve. This allows the lubricating medium on the innermost wall of the elastic sleeve to isolate the sliding rod from the elastic sleeve, enabling a non-rotational contact between them. This reduces the resistance of the sliding rod during rotation and / or sliding, thereby reducing wear on the sliding rod. Simultaneously, this arrangement uses less lubricating medium, thus reducing friction and lowering temperature rise.

[0012] Furthermore, the lubricating medium enables the sliding rod and the elastic sleeve, and / or the elastic sleeve and the mounting base to form a wedge gap. This wedge gap refers to an isolation formed by substances such as gas or lubricating oil, i.e., a non-contact state. This space is very small, typically measured in micrometers.

[0013] Furthermore, the elastic sleeve is a multi-layer elastic sleeve, which includes a first layer structure and a second layer structure arranged adjacent to each other, and a lubricating medium is disposed between the first layer structure and the second layer structure.

[0014] Furthermore, the lubricating medium between any of the first and second layer structures can create a wedge gap between them.

[0015] Furthermore, any two adjacent layers of the multi-layer elastic sleeve are filled with a lubricating medium.

[0016] Furthermore, a positioning structure is provided on the connecting surface of any two adjacent layers of the multi-layer elastic sleeve.

[0017] Furthermore, the shielding structure also includes at least one elastic blocking ring installed at the sliding rod and the mounting hole.

[0018] Furthermore, the elastic blocking ring is a hard rubber sleeve.

[0019] Furthermore, the other end of the elastic sleeve (i.e. the end that is airtightly connected to the mounting base) is provided with a flange that is fixedly connected to the mounting base, and the flange is sealed and installed to the mounting base by threaded fasteners and / or clamping devices.

[0020] Furthermore, one end of the elastic sleeve is fitted onto the sliding rod via multiple clamps.

[0021] Furthermore, a first concave-convex limiting structure is provided on the contact surface between the elastic sleeve and the mounting base, and a first mating structure that mates with the first concave-convex limiting structure is correspondingly provided on the mounting base.

[0022] Furthermore, a second concave-convex limiting structure is provided on the contact surface between the elastic sleeve and the sliding rod, and a second mating structure that cooperates with the second concave-convex limiting structure is correspondingly provided on the sliding rod.

[0023] Furthermore, the shielding structure also includes a cooling device for cooling at least one of the sliding rod, mounting base, and elastic sleeve.

[0024] In one specific embodiment, the cooling device includes a cooling chamber with an inlet and an outlet. By introducing a medium such as water into the cooling chamber, objects inside or in contact with the cooling chamber can be cooled. The cooling chamber surrounds the mounting base; that is, a surrounding plate is installed outside the mounting base, and the surrounding plate and the outer wall of the mounting base form the mounting chamber.

[0025] In another specific embodiment, the cooling device is a heat dissipation device such as heat dissipation fins.

[0026] Furthermore, the sliding rod has a first cooling medium channel inside, and the sliding rod on the other side of the mounting base has a first inlet and a first outlet communicating with the first cooling medium channel. The first cooling medium channel is a U-shaped channel disposed inside the sliding rod. The shielding structure also includes a first flexible hose communicating with the first inlet and a second flexible hose communicating with the first outlet.

[0027] Furthermore, the mounting base has a second cooling medium channel inside, and a second inlet and a second outlet communicating with the second cooling medium channel are provided on the portion of the mounting base located outside the mounting hole. The outer and inner sides of the mounting hole are demarcated by the hole wall; the side of the inner wall closer to the center of the mounting hole is the inner side, and the side further out, away from the center, is the outer side. By providing the cooling medium channel, heat can be dissipated from the inside of the valve cover and valve stem, thus enabling the shielding structure to be used in high-temperature applications, thereby expanding its applicability. The cooling device includes a second cooling medium channel and a first cooling medium channel.

[0028] Furthermore, the lubricating medium includes at least one of water, lubricating oil, molybdenum disulfide, etc. That is, the lubricating medium can be a medium that performs lubrication, such as water, molybdenum disulfide, lead powder, lubricating oil, etc., or other common substances used for lubrication.

[0029] The present invention also provides a valve, including the aforementioned shielding structure and a valve seat, wherein a valve cavity is provided within the valve seat, and the valve seat includes the mounting base. The sliding rod of the shielding structure is the valve stem. Of course, the mounting base can specifically be a valve cover of the valve seat or a central partition structure provided within the valve seat. That is, any structure with a mounting hole for the valve stem to pass through can be used as a mounting base; that is, wherever the valve stem needs to slide and seal, the aforementioned shielding structure can be used.

[0030] Furthermore, the valve seat includes a valve body and a valve cover mounted on the valve body, the mounting seat being the valve cover, and the elastic sleeve of the shielding structure being located within the valve body.

[0031] The third aspect of the present invention provides a pump, including the aforementioned shielding structure or the aforementioned valve. When the pump includes the aforementioned shielding structure, it also includes a pump housing, within which a pump chamber is provided, and the pump housing includes the aforementioned mounting base. The sliding rod of the shielding structure is the rotating rod of the pump. Of course, the mounting base can specifically be a valve cover of the pump housing or a central partition structure provided within the pump housing. That is, any structure with a mounting hole through which the rotating rod passes can be used as a mounting base; in other words, wherever the rotating rod needs to slide and seal, the aforementioned shielding structure can be used.

[0032] Of course, the shielding structure in this application can also be used in any other application that requires a sliding seal, and is not limited to pumps and valves.

[0033] The shielding structure, valve, and pump provided by the technical solution of the present invention can be specifically disposed within the valve cavity to achieve a sealed shielding of the valve stem. This shielding structure includes a mounting base and a sliding rod, with the sliding rod passing through the inner hole of the mounting base (e.g., a valve cover). One end of an elastic sleeve is tightened onto the sliding rod by a clamping member, ensuring the tightening force is greater than the pressure of media leakage. The sleeve is fixed to the outer circumference of the sliding rod and moves with it. Simultaneously, by providing a flange at the other end of the elastic sleeve and pressing it against one side of the mounting base (e.g., the inner side of the valve cover) by a clamping device, it is ensured that the media within the valve cavity cannot escape from either end of the elastic sleeve, nor from the gap between the sliding rod and the mounting base, thus preventing media leakage. When the transported medium is hazardous, it also ensures personal safety and has significant environmental benefits. Furthermore, this solution eliminates the need for a packing structure, preventing packing wear between the sliding rod and the mounting base, and reducing the production and maintenance costs of the sliding rod. Furthermore, designing the sliding rod and valve cover mounting bases as hollow structures allows cooling water or oil to circulate inside, thus cooling the elastic sleeve and increasing the overall operating temperature limit of valves and other products. Additionally, the elastic sleeve is elastic, and a space is provided between the sliding rod and the elastic sleeve to accommodate lubricating medium. This lubricating medium makes it less likely for the elastic sleeve and sliding rod to stick together, reducing the coefficient of friction. This prevents the elastic sleeve from adhering to the sliding rod during vertical movement or rotation, ensuring smooth operation of the sliding rod along the axial direction of the mounting hole and preventing the elastic sleeve from breaking. Without lubricating medium, the coefficient of friction between the elastic sleeve and sliding rod would be very high, potentially causing the elastic sleeve to stick to the sliding rod. This would prevent the sliding rod from operating smoothly within the elastic sleeve and could damage it. Therefore, filling with lubricating medium also increases the lifespan of the elastic sleeve.

[0034] In one specific embodiment, the shielding structure is used in a valve. The valve stem and valve cover, and other parts requiring sliding seals, utilize this shielding structure to ensure a smooth sliding seal on the valve stem. Of course, the shielding structure can also be used in pumps, such as plunger pumps and high-temperature plunger pumps.

[0035] Furthermore, a static seal is achieved by installing a hard rubber sleeve at the gap between the valve stem / sliding rod and the mounting base (such as the valve cover). The hard rubber sleeve has less ductility than the elastic sleeve, meaning its pressure-bearing capacity is greater. Given that the hard rubber sleeve has a certain pressure-bearing capacity and is not easily deformed, it can compensate for the problem of the elastic sleeve, which has better ductility and is prone to leaking out from the gap between the valve stem / sliding rod and the mounting base (such as the valve cover). This ensures that the elastic sleeve is not easily carried out by the sliding rod during operation, thus ensuring the reliability of the sliding seal and the smoothness of the sliding rod's movement, preventing the sliding rod from being jammed or blocked by the elastic sleeve.

[0036] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0038] Figure 1 This is a schematic diagram of the shielding structure provided in an embodiment of the present invention;

[0039] Figure 2 This is for Figure 1 A magnified schematic diagram of the local structure at point A;

[0040] Figure 3 A schematic diagram of the valve structure provided for an embodiment of the present invention.

[0041] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0042] 1 Valve seat, 12 Valve cover, 122 Mounting hole, 14 Valve body, 140 Valve cavity, 16 Extended structure, 2 Sliding rod, 22 First cooling medium channel, 3 Elastic sleeve, 32 First layer structure, 34 Second layer structure, 4 Fastener, 5 Elastic retaining ring, 6 Threaded fastener, 72 First hose, 74 Second hose, 8 Water cooling cavity. Detailed Implementation

[0043] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0044] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0045] The following reference Figure 1 and Figure 2 This describes the shielding structure provided according to some embodiments of the present invention.

[0046] like Figure 1 and Figure 2 As shown, an embodiment of the first aspect of the present invention provides a shielding structure, which includes a mounting base, a sliding rod 2, and an elastic sleeve 3. The mounting base may specifically include... Figure 1 and Figure 2The valve cover 12 and its mounting base are provided with mounting holes 122. The sliding rod 2 can be inserted into the mounting hole 122 and slide along the axial direction of the mounting hole 122. An elastic sleeve 3 is provided over the sliding rod 2. One end of the elastic sleeve 3 is airtightly sealed to the sliding rod 2, and the other end is airtightly sealed to one side of the mounting base (such as the valve cover 12) and located outside the mounting hole 122. It can be understood that when the elastic sleeve 3 is installed on the mounting base such as the valve cover 12, it does not affect the insertion of the sliding rod 2 into the mounting hole 122, thereby ensuring the normal installation of the sliding rod 2. Furthermore, by sealing both ends of the elastic sleeve 3 and installing one end on the mounting base, it is ensured that the medium in the valve cavity 140 cannot leak through the elastic sleeve 3 and the sliding rod 2, nor can it leak through the mounting hole 122 on the mounting base. When an elastic sleeve 3 is installed outside the sliding rod 2, a receiving space or a small gap is provided between the sliding rod 2 and the elastic sleeve 3. A lubricating medium can be filled into the gap. This lubricating medium makes it less likely for the elastic sleeve 3 and the sliding rod 2 to stick together, thus reducing the coefficient of friction between them. This prevents the elastic sleeve 3 from sticking to the sliding rod 2 when it moves up and down, ensuring smooth operation of the sliding rod 2 as it slides along the axial direction of the mounting hole 122. Without a lubricating medium, the coefficient of friction between the elastic sleeve 3 and the sliding rod 2 would be very high, potentially causing the elastic sleeve 3 to stick to the sliding rod 2, thus hindering the smooth operation of the sliding rod 2 within the elastic sleeve 3. Furthermore, this structure, due to the good ductility of the elastic sleeve 3, allows it to elongate in length (generally up to 11 times its original length) and to twist in the circumferential direction. This allows the sliding rod 2 to slide up and down as well as rotate in the circumferential direction, enabling more flexible movement during operation and reducing the impact of torsional forces on the sliding rod 2. Furthermore, the elastic sleeve, through its internal lubricating medium, creates a gap between itself and the sliding rod 2 and the mounting seat. This buffer space between the elastic sleeve and the sliding rod 2 and mounting seat allows for the initial absorption of external forces, reducing the force applied to the sliding rod 2 and mounting seat, thus improving the overall pressure resistance of the device. In other words, this structure allows the elastic sleeve 3 to partially or completely cover the sliding rod 2 and mounting seat. The elastic sleeve 3 and its internal lubricating medium provide a buffer against the flowing medium, preventing hard impacts on the sliding rod 2 and mounting seat during medium flow. This reduces the hard wear caused by the flowing medium, improving the strength and service life of the sliding rod 2 and mounting seat. For example, when this structure is used in a valve body, it increases the valve body's pressure resistance, allowing the valve body to handle higher pressure media.Furthermore, the sliding rod 2 can also rotate along the circumferential direction of the mounting hole 122, and the lubricating medium can also play a lubricating role during the rotation process, avoiding excessive resistance between the sliding rod 2 and the elastic sleeve 3 to prevent dry friction and thus prevent the sliding rod 2 from working properly.

[0047] Furthermore, the lubricating medium is an isolation membrane disposed on the inner wall of the elastic sleeve 3. Of course, when the lubricating medium has good fluidity, the lubricating medium is in a concentrated state under normal conditions. However, when the elastic sleeve is compressed and deformed to fit against the sliding rod and the mounting seat, the lubricating medium is squeezed and isolated between the elastic sleeve and the sliding rod, thereby forming a thin film isolation (such as oil film isolation, liquid film isolation, etc.). Through this film, oil gaps and air gaps are formed between the elastic sleeve and the sliding rod, and between the elastic sleeve and the mounting seat, thus forming a wedge gap between them.

[0048] Furthermore, the end of the elastic sleeve 3 furthest from the mounting base is connected to the bottom of the end of the sliding rod inserted into the mounting hole, that is, the elastic sleeve 3 is connected to the root of the sliding rod 2. In this way, the elastic sleeve 3 can cover the entire sliding rod 2 inserted into the mounting hole, avoiding direct contact between the sliding rod 2 and the medium inside the mounting base. This can more effectively reduce the impact and wear of the flowing medium on the sliding rod.

[0049] In this application, both ends of the elastic sleeve 3 can form a sealed shield, therefore it is also called an elastic shielding sleeve.

[0050] Furthermore, to reduce the impact of the flowing medium on the mounting base, the elastic sleeve 3 can be fixedly installed to the edge of the mounting base so as to form a protective covering over the entire inner surface of the mounting base. In the above embodiments, such as... Figure 1 and Figure 2 As shown, the elastic sleeve 3 is a multi-layered elastic sleeve, comprising a first layer structure 32 and a second layer structure 34 arranged adjacent to each other, with a lubricating medium disposed between the first layer structure 32 and the second layer structure 34. By setting up multiple layers of elastic sleeve 3, a shielding effect can be further achieved. This embodiment uses two layers of elastic sleeve 3 as an example, but it is not limited to two layers. If the first layer structure 32 of the elastic sleeve 3 is punctured or damaged, the second layer structure 34 of the elastic sleeve 3 can still play a shielding role, thereby further shielding the medium. At the same time, a lubricating medium is also disposed between the two layers of the elastic sleeve 3, which can also prevent dry friction between the two layers of the elastic sleeve 3, thereby increasing the service life of the elastic sleeve 3.

[0051] In the above embodiments, lubricating medium is filled between any two adjacent layers of the multi-layer elastic sleeve, thereby preventing dry friction between the elastic sleeves 3. This also prevents the multi-layer structure of the elastic sleeve 3 from sticking together when the sliding rod 2 slides along the axial direction of the mounting hole 122, ensuring the normal operation of the sliding rod 2. If the multi-layer structure of the elastic sleeve 3 sticks together, it will be difficult for the sliding rod 2 to slide axially, and it may also cause damage to the elastic sleeve 3, thus reducing its service life.

[0052] Furthermore, the elastic sleeve 3 is a multi-layer elastic sleeve, and a positioning structure is provided on the connecting surface of any two adjacent layers of the multi-layer elastic sleeve. This allows the multi-layer elastic sleeve 3 to be stacked together through the positioning structure, which facilitates the installation between the multi-layer elastic sleeve 3 and enables the multi-layer elastic sleeve 3 to be installed together quickly, greatly saving time.

[0053] In the above implementation list, such as Figure 1 and Figure 2 As shown, the shielding structure also includes at least one elastic blocking ring 5, installed at the junction of the sliding rod 2 and the mounting hole 122, blocking the gap between the sliding rod 2 and the mounting hole 122. This prevents the elastic sleeve 3 from being squeezed out of the gap between the sliding rod 2 and the mounting hole 122 when the pressure in the valve chamber 140 is too high, thus preventing damage to the elastic sleeve 3. Of course, when the pressure in the valve chamber 140 is not very high, the elastic sleeve 3 will not be squeezed out of the gap between the sliding rod 2 and the mounting hole 122, so the elastic blocking ring 5 may not be necessary.

[0054] Furthermore, the elastic retaining ring 5 at the gap between the sliding rod 2 (such as the valve stem) and the mounting seat (such as the valve cover) is preferably a hard rubber sleeve. The hard rubber sleeve has less ductility than the elastic sleeve 3, meaning that the pressure-bearing capacity of the hard rubber sleeve is greater than that of the elastic sleeve 3. Given that the hard rubber sleeve has a certain pressure-bearing capacity and is not easily deformed, it can compensate for the problem that the elastic sleeve 3, due to its better ductility, easily flows out from the gap between the sliding rod 2 and the mounting seat (such as the valve cover). This ensures that the elastic sleeve 3 is not easily carried out by the sliding rod 2 during operation, thus ensuring the reliability of the sliding seal and the smoothness of the sliding rod 2, and preventing the sliding rod 2 from being jammed or blocked by the elastic sleeve 3.

[0055] In the above embodiments, such as Figure 1 and Figure 2 As shown, the other end of the elastic sleeve 3 is provided with a flange that is fixedly connected to the mounting base. The flange is sealed and installed on the mounting base by a threaded fastener 6, thereby ensuring that the medium in the valve cavity 140 cannot escape from the mounting hole 122 on the mounting base. Alternatively, the flange can be sealed and installed on the mounting base by a clamping device, as long as the flange can be clamped and sealed.

[0056] In the above embodiment, one end of the elastic sleeve 3 is fitted onto the sliding rod 2 by a plurality of clamping members 4, thereby sealing one end of the elastic sleeve 3 onto the sliding rod 2 and ensuring that the medium in the valve cavity 140 cannot leak from between the sliding rod 2 and the elastic sleeve 3.

[0057] In the above embodiment, a first concave-convex limiting structure is provided on the contact surface between the elastic sleeve 3 and the mounting base, and a first mating structure that cooperates with the first concave-convex limiting structure is provided on the mounting base. This allows the elastic sleeve 3 to be accurately installed on the mounting base. At the same time, by providing the first concave-convex limiting structure and the first mating structure, the mounting base and the elastic sleeve 3 are further mated, increasing the difficulty for the medium in the valve cavity 140 to flow out between the mounting base and the elastic sleeve 3.

[0058] In the above embodiment, a second concave-convex limiting structure is provided on the contact surface between the elastic sleeve 3 and the sliding rod 2, and a second mating structure that cooperates with the second concave-convex limiting structure is correspondingly provided on the sliding rod 2. By providing the second concave-convex limiting structure and the second mating structure, when the elastic sleeve 3 is installed on the sliding rod 2, the elastic sleeve 3 on both sides of the second mating structure is tightened with clamping members 4, that is, the clamping members 4 are tightened on both sides of the second mating structure along the axial direction of the sliding rod 2, thereby ensuring that the elastic sleeve 3 does not move in the axial direction when the sliding rod 2 moves in the axial direction.

[0059] In any of the above embodiments, the shielding structure further includes a cooling device for cooling the mounting base, sliding rod, or elastic sleeve 3.

[0060] In one specific embodiment, the cooling device includes a cooling chamber with an inlet and an outlet. By introducing a medium such as water into the cooling chamber, objects inside or in contact with the cooling chamber can be cooled. The cooling chamber surrounds the mounting base; that is, a surrounding plate is installed outside the mounting base, and the surrounding plate and the outer wall of the mounting base form the mounting chamber.

[0061] In another specific embodiment, the cooling device is a heat dissipation device such as heat dissipation fins.

[0062] In any of the above embodiments, a first cooling medium channel 22 is provided inside the sliding rod 2. A first inlet and a first outlet communicating with the first cooling medium channel 22 are provided on the other side of the sliding rod 2, allowing cooling medium to be added to the first cooling medium channel 22 through the first inlet to cool the elastic sleeve 3 covering the sliding rod 2. When the temperature of the cooling medium in the first cooling medium channel 22 is too high, it can be discharged through the first outlet, and new cooling medium can be added through the first inlet to ensure the cooling effect. The first cooling medium channel 22 is a U-shaped channel within the sliding rod 2. This U-shaped channel ensures that the sliding rod 2 can be cooled by the cooling medium in the axial direction, thus ensuring that all parts of the sliding rod 2 are cooled. Simultaneously, the input and output of the cooling medium are facilitated by a first flexible hose 72 communicating with the first inlet and a second flexible hose 74 communicating with the first outlet.

[0063] Furthermore, the mounting base is provided with a second cooling medium channel inside. The mounting base is provided with a second inlet and a second outlet on the part outside the mounting hole 122 that communicate with the second cooling medium channel. Cooling medium can be added to the second cooling medium channel through the second inlet to cool the mounting base. When the temperature of the cooling medium in the second cooling medium channel is too high, it can be discharged through the second outlet, which facilitates the replacement of the cooling medium and ensures the cooling effect on the mounting base.

[0064] In any of the above embodiments, the lubricating medium includes at least one of water, lubricating oil, molybdenum disulfide, lead powder, etc. These lubricating media have good lubrication effects and can achieve good lubrication results.

[0065] A second aspect of the present invention provides a valve, including a valve seat 1, within which a valve cavity 140 is disposed. The valve seat 1 includes a mounting base and a shielding structure provided in any embodiment of the first aspect. Since it includes the shielding structure of any embodiment of the first aspect, it possesses all the beneficial technical effects of the first aspect embodiment, which will not be elaborated further here.

[0066] In the above embodiment, the valve seat 1 includes a valve body 14 and a valve cover 12 mounted on the valve body 14. The mounting seat is the valve cover 12, and the elastic sleeve 3 of the shielding structure is located inside the valve body 14, thereby enabling it to shield the medium inside the valve body 14.

[0067] In a specific implementation, such as Figure 3 As shown, the valve is a high-temperature resistant valve. The valve seat 1 of this type of valve includes an elongated structure 16 (an elongated valve cover or an elongated valve seat). This type of valve also includes a cooling device for cooling the elongated structure. Further, as... Figure 3 As shown, the elastic sleeve 3 is located on one side (preferably on top) of the elongated structure 16.

[0068] The cooling device may specifically be a heat sink installed at the extended structure 16 or a water-cooling device corresponding to the extended structure. Specifically, such as... Figure 3 As shown, the water-cooling device includes a water-cooling cavity 8, which surrounds the elongated structure 16. The water-cooling cavity 8 is equipped with a water inlet and a water outlet. Figure 3 In the middle, the cooling water can be arranged according to Figure 3 The left arrow in the diagram leads into water-cooled chamber 8, then... Figure 3 The right arrow in the image shows water flowing out of the water-cooling chamber 8.

[0069] The present invention also provides a pump, including the shielding structure or the valve described above.

[0070] Furthermore, the pump also includes a pump casing, within which a pump chamber is provided, and the pump casing includes the mounting base. The sliding rod of the shielding structure is the pump's rotating rod, i.e., the pump rod (such as a piston rod). Of course, the mounting base can specifically be a valve cover of the pump casing or a central partition structure within the pump casing. That is, any structure with a mounting hole through which the rotating rod passes can serve as a mounting base; in other words, wherever the rotating rod needs to slide and seal, the aforementioned shielding structure can be used.

[0071] Furthermore, since the above-mentioned pump is a plunger pump, the shielding structure in this application can be applied to the plunger pump, turning an ordinary plunger pump into a shielded plunger pump, meaning that the liquid inside the pump chamber will not leak when the plunger pump is working.

[0072] In one specific embodiment, the plunger pump includes: a housing; within the housing, a cylinder liner and the housing form a receiving cavity, the cylinder liner having a mounting hole communicating with the receiving cavity; a piston disposed within the receiving cavity; a piston rod passing through the mounting hole and connected to the piston; and an elastic shielding sleeve fitted onto the piston rod, with a first end of the elastic shielding sleeve connected to the cylinder liner and a second end of the elastic shielding sleeve connected to the piston rod, forming a shielding cavity between the elastic shielding sleeve and the piston rod, the shielding cavity communicating with the mounting hole. This invention solves the problem in the prior art where liquid in the working cavity of the plunger pump easily leaks, thus affecting the normal operation of the plunger pump.

[0073] In the description of this specification, the terms "connection," "installation," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0074] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0075] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A shielding structure, characterized in that, include: Mounting base, wherein the mounting base is provided with mounting holes; A sliding rod, which is inserted into the mounting hole and is capable of sliding along the axial direction of the mounting hole and / or rotating along the circumferential direction of the mounting hole; An elastic sleeve is fitted and installed outside the sliding rod, located on one side of the mounting base. One end of the elastic sleeve is airtightly installed on the sliding rod, and the other end of the elastic sleeve is airtightly installed to the mounting base and located outside the mounting hole. The space between the elastic sleeve, the sliding rod, and the mounting base is filled with a lubricating medium. The lubricating medium is used to reduce the coefficient of friction between the elastic sleeve and the sliding rod, and to create a buffer space between the elastic sleeve, the sliding rod, and the mounting base. The elastic sleeve is a multi-layer elastic sleeve, which includes a first layer structure and a second layer structure arranged adjacent to each other, and a lubricating medium is provided between the first layer structure and the second layer structure.

2. The shielding structure according to claim 1, characterized in that, The lubricating medium enables the sliding rod and the elastic sleeve and / or the elastic sleeve to form a wedge gap with the mounting base; or The lubricating medium is a lubricating film formed on the inner wall surface of the elastic sleeve.

3. The shielding structure according to claim 1, characterized in that, The lubricating medium between the first layer and the second layer enables a wedge gap to be formed between them; and / or The space between any two adjacent layers of the multi-layered elastic sleeve is filled with a lubricating medium; and / or A positioning structure is provided on the connecting surface of any two adjacent layers of the multi-layer elastic sleeve.

4. The shielding structure according to claim 1, characterized in that, Also includes: At least one elastic retaining ring is installed at the sliding rod and the mounting hole.

5. The shielding structure according to any one of claims 1 to 4, characterized in that, Also includes: A cooling device for cooling the mounting base, the sliding rod, or the elastic sleeve; The sliding rod has a first cooling medium channel inside. A first inlet and a first outlet communicating with the first cooling medium channel are located on the other side of the mounting base. The first cooling medium channel is a U-shaped channel within the sliding rod. The shielding structure further includes a first flexible hose communicating with the first inlet and a second flexible hose communicating with the first outlet; and / or The mounting base has a second cooling medium channel inside, and the mounting base has a second inlet and a second outlet on the outer side of the mounting hole that communicate with the second cooling medium channel.

6. The shielding structure according to any one of claims 1 to 4, characterized in that, The lubricating medium includes at least one of water, lubricating oil, molybdenum disulfide, and lead powder.

7. A valve, characterized in that, include: The shielding structure as described in any one of claims 1 to 6; and A valve seat, wherein a valve cavity is provided inside the valve seat, and the valve seat includes the mounting base.

8. The valve according to claim 7, characterized in that, The valve seat includes a valve body and a valve cover mounted on the valve body, the mounting seat being the valve cover, and the elastic sleeve of the shielding structure being located inside the valve body.

9. A pump, characterized in that, include: The shielding structure as described in any one of claims 1 to 6 or the valve as described in any one of claims 7 to 8.

Images