Grease injection plug valve with sponge diversion trench

Abstract

The utility model discloses a grease injection plug valve with a sponge flow guide groove, and relates to the technical field of valve sealing. Comprising a valve body, a valve rod and a plug cock arranged in the valve body, a flow guide channel composed of an axial flow guide groove and an annular flow guide groove is formed in the inner wall of the valve body, and elastic sponge is fixed in the grooves through dovetail buckles; a grease injection valve on the side wall of the valve body communicates with the flow guide groove through a grease injection channel. The axial flow guide grooves are symmetrically distributed in the two sides of the cock, the annular flow guide grooves are formed in the upper bottom face and the lower bottom face of the cock, and the protruding arc face of the elastic sponge is in interference fit with the cock. When the cock rotates, the sponge is compressed to release lubricating grease to a sealing surface, and when the cock is closed, the sponge rebounds to recover residual grease. Grease release and recovery are adjusted in a self-adaptive mode through deformation of the elastic sponge, the problems of uneven accumulation of lubricating grease and medium pollution of a traditional plug valve are solved, and the structure is simple and reliable.

Description

Technical Field

[0001] This application relates to the field of valve sealing technology, specifically to a grease-filled plug valve with a sponge guide groove. Background Technology

[0002] As a widely used opening and closing control component in fluid pipelines, the dynamic seal between the valve core and the valve body of the plug valve relies on the periodic injection of grease to maintain the sealing performance. The traditional grease injection method generally involves directly pressing the grease into the sealing interface through the grease injection channel opened in the valve body, and then applying the grease by rotating the plug.

[0003] However, in practical applications, it has been found that due to the centrifugal force during the rotation of the valve stem and the inherent viscosity of the grease, the injected grease tends to accumulate locally on the inner wall of the valve body, resulting in uneven grease coverage on the sealing surface. Especially under high-temperature or high-frequency operating conditions, this uneven grease distribution exacerbates wear at the sealing interface, shortens the valve's service life, and the excess grease may mix into the media flow path, causing product contamination or system blockage. Traditional grease injection systems lack dynamic adjustment capabilities for the amount of grease injected, making it difficult to adapt to the diffusion characteristics of greases of different viscosities. Operators often compensate for uneven distribution by increasing the frequency of grease injection, which not only wastes grease but also poses a risk of secondary contamination in industries with strict requirements for media cleanliness, such as petrochemicals and food processing. Utility Model Content

[0004] The purpose of this application is to provide a grease injection plug valve with a sponge guide groove to optimize the problems of uneven lubrication distribution, grease waste and secondary pollution in existing grease injection plug valves.

[0005] To achieve the above-mentioned technical objectives, the technical solution adopted in this application is as follows:

[0006] A grease injection stopcock valve with a sponge flow channel is provided, comprising a valve body, a valve stem, and a stopcock. The stopcock is disposed in the stopcock receiving cavity of the valve body and is tightly fitted to the inner wall of the valve body. The valve stem is connected to the top of the stopcock and drives the stopcock to rotate. A flow channel is formed in the inner wall of the valve body, and a tightly fitted elastic sponge is filled in the flow channel. The elastic sponge contacts the outer wall of the stopcock and forms an interference fit with the outer wall of the stopcock. A grease injection valve is also provided on the side wall of the valve body, and the grease injection valve is connected to the flow channel through a grease injection channel. In the above technical solution, through the matching structure of the flow channel and the elastic sponge, combined with the connection design of the grease injection channel, the grease can be directionally delivered, dynamically stored, and uniformly coated when the stopcock rotates. At the same time, the grease release is automatically adjusted by the elastic deformation and rebound characteristics of the sponge strip, reducing the risk of residual grease entering the medium flow channel.

[0007] It is understandable that the elastic sponge, made of porous composite material, has the function of absorbing and storing grease. When squeezed by the valve, it undergoes elastic deformation, releasing the stored grease. When the pressure is released, it returns to its original shape through the material's shape memory properties, while simultaneously generating negative pressure to adsorb the grease. The grease injection valve is a specialized device for adding lubricating grease to valves. It has a central injection hole and a built-in one-way valve structure to ensure unidirectional grease flow. Grease is a lubricating material that provides sealing, lubrication, and protection. The grease injection valve controls the grease to flow along the injection channel into the valve body's inner wall guide channel. The elastic sponge absorbs the grease injected by the valve and remains wetted. When the valve rotates, the elastic sponge is squeezed by the outer wall of the valve, evenly coating the outer surface of the valve with grease.

[0008] This design, through the combination of the flow channel and the elastic sponge structure, along with the interconnected design of the grease injection channel, enables directional delivery, dynamic storage, and uniform application of grease during the rotation of the valve. At the same time, the elastic deformation and rebound characteristics of the sponge strip automatically adjust the amount of grease released, reducing the risk of residual grease entering the media flow channel. This effectively solves the technical problems of uneven grease distribution, excessive accumulation, and media contamination that exist in traditional grease injection methods.

[0009] In some embodiments, the flow channel includes an axial flow channel and an circumferential flow channel;

[0010] The elastic sponge includes axially brushed sponge and circumferentially brushed sponge;

[0011] At least one set of axial flow guide grooves is provided, with two grooves in each set and symmetrically distributed on both sides of the inner wall of the valve body valve receiving cavity along the axial direction of the valve. The two ends of the axial flow guide grooves correspond to the upper bottom surface and the lower bottom surface of the valve, respectively.

[0012] The axial guide groove is filled with a tightly fitted axial brush sponge;

[0013] The circumferential guide groove consists of two grooves, which are respectively arranged circumferentially along the valve body wall corresponding to the upper and lower bottom surfaces of the valve body.

[0014] The circumferential guide groove is filled with a tightly fitted circumferential brush sponge.

[0015] Furthermore, the bottom of the axial guide channel is provided with an axial dovetail locking groove, and the back of the axial brushing sponge is provided with an axial dovetail buckle that matches the axial dovetail locking groove. The axial brushing sponge is fixed in the axial guide channel by the axial dovetail buckle and the axial dovetail locking groove.

[0016] The bottom of the circumferential flow guide groove is provided with a circumferential dovetail-shaped locking groove, and the back of the circumferential brushing sponge is provided with a circumferential dovetail-shaped buckle that matches the circumferential dovetail-shaped locking groove. The circumferential brushing sponge is fixed in the circumferential flow guide groove by the snap-fit ​​between the circumferential dovetail-shaped buckle and the circumferential dovetail-shaped locking groove.

[0017] In some embodiments, the axial grease sponge has a raised axial grease sponge arc surface on the side near the valve. The axial grease sponge arc surface contacts the outer surface of the valve to form an interference fit, and the interference fit amount is the thickness of the raised arc surface.

[0018] The circumferential grease-removing sponge has a raised circumferential grease-removing sponge arc surface on the side near the valve. The circumferential grease-removing sponge arc surface contacts the outer surface of the valve to form an interference fit. The interference fit amount is the thickness of the raised arc surface.

[0019] In some embodiments, the grease injection valve is disposed in the junction area of ​​the axial guide groove and the circumferential guide groove on the side wall of the valve body.

[0020] Optionally, the grease injection valve is disposed at at least one junction area between the circumferential guide groove and the axial guide groove corresponding to the bottom surface of the valve.

[0021] In some embodiments, the stopcock is a frustum-shaped structure with a top radius greater than the bottom radius, a flow channel in the middle that matches the valve body, and elastic sealing rings on the upper and lower sides of the flow channel.

[0022] Compared with existing technologies, the advantages of this application are: it provides a grease injection valve with a sponge guide groove, which effectively improves the problems of uneven grease distribution, residual contamination, and short sealing life of traditional valves through the cooperation of the guide groove and the elastic sponge. The design combines adaptive lubrication adjustment and anti-contamination functions, and has a simple structure with outstanding application value. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a cross-sectional structural diagram of an embodiment of the application;

[0025] Figure 2 This is a three-dimensional structural diagram of an embodiment of the application;

[0026] Figure 3 This is a schematic diagram of the valve body cavity structure according to an embodiment of the application;

[0027] Figure 4 for Figure 2 Schematic diagram of section A;

[0028] Figure 5 for Figure 2 Schematic diagram of section B;

[0029] The following are the labeling elements in the figure:

[0030] 1. Valve body; 2. Valve stem; 3. Plug; 31. Flow passage; 32. Elastic sealing ring; 4. Flow guide passage; 411. Axial flow guide groove; 412. Axial dovetail locking groove; 421. Circumferential flow guide groove; 422. Circumferential dovetail locking groove; 5. Elastic sponge; 511. Axial grease-brushing sponge arc surface; 512. Axial dovetail snap; 521. Circumferential grease-brushing sponge arc surface; 522. Circumferential dovetail snap; 6. Grease injection valve; 7. Grease injection channel. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application. The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0033] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] It should be noted that in this application, the terms "in some embodiments," "optionally," and "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "in some embodiments," "optionally," or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments or design schemes. Specifically, the use of terms such as "in some embodiments," "optionally," and "for example" is intended to present the relevant concepts in a specific manner, meaning that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of this application. The appearance of the above terms in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0035] In the field of traditional grease-injected valve sealing technology, existing technologies directly inject grease into the sealing interface through grease injection channels opened in the valve body. However, in practical applications, it has been found that due to the centrifugal force during the rotation of the stopcock and the inherent viscosity of the grease, the injected grease tends to accumulate locally on the inner wall of the valve body, resulting in uneven grease coverage on the sealing surface. Especially under high-temperature or high-frequency operating conditions, this uneven grease distribution can exacerbate wear on the sealing interface, shorten the valve's service life, and the excess grease may mix into the media flow channel, causing product contamination or potential system blockage.

[0036] To address the aforementioned technical issues, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0037] Please refer to the following: Figures 1 to 5 This application provides a grease injection stopcock valve with a sponge guide groove, including a valve body 1, a valve stem 2, and a stopcock 3. The stopcock 3 is disposed in the stopcock 3 receiving cavity of the valve body 1 and is tightly fitted to the inner wall of the valve body 1. The valve stem 2 is connected to the top of the stopcock 3 and drives the stopcock 3 to rotate. A guide channel 4 is formed in the inner wall of the valve body 1, and a tightly fitted elastic sponge 5 is filled in the guide channel 4. The elastic sponge 5 contacts the outer wall of the stopcock 3 and forms an interference fit with the outer wall of the stopcock 3. A grease injection valve 6 is also provided on the side wall of the valve body 1, and the grease injection valve 6 is connected to the guide channel 4 through a grease injection channel 7.

[0038] It is understandable that the elastic sponge 5, made of porous composite material, has the function of absorbing and storing grease. When squeezed by the stopcock 3, it undergoes elastic deformation, releasing the stored grease. When the pressure is released, it returns to its original shape through the material's shape memory properties, while simultaneously generating negative pressure to absorb the grease. The grease injection valve 6 is a special device for adding lubricating grease to the valve. It has an oil injection hole in the center and a built-in one-way valve structure to ensure unidirectional flow of grease. Grease is a lubricating material that provides sealing, lubrication, and protection. The grease injection valve 6 controls the grease to flow along the grease injection channel 7 into the guide channel 4 on the inner wall of the valve body. The elastic sponge 5 absorbs the grease injected by the grease injection valve 6 and remains wetted. When the stopcock 3 rotates, the elastic sponge 5 is squeezed by the outer wall of the stopcock 3, evenly coating the outer surface of the stopcock 3 with grease.

[0039] This configuration, through the cooperative structure of the flow channel 4 and the elastic sponge 5, combined with the interconnected design of the grease injection channel 7, enables directional delivery, dynamic storage, and uniform application of grease as the stopcock 3 rotates. At the same time, the grease release is automatically adjusted by the elastic deformation and rebound characteristics of the sponge strip, reducing the risk of residual grease entering the media flow channel. This effectively solves the technical problems of uneven grease distribution, excessive accumulation, and media contamination that exist in traditional grease injection methods.

[0040] In some embodiments, the flow channel 4 includes an axial flow channel 411 and an circumferential flow channel 421, and the elastic sponge 5 includes an axial grease-removing sponge 51 and an circumferential grease-removing sponge 52. At least one set of axial flow channels 411 is provided, with two channels in each set symmetrically distributed along the axial direction of the stopcock 3 on both sides of the inner wall of the valve body 1's stopcock cavity. The two ends of the axial flow channels 411 correspond to the upper and lower bottom surfaces of the stopcock 3, respectively. The axial flow channels 411 are filled with the tightly fitted axial grease-removing sponge 51. Two circumferential flow channels 421 are provided, one above the other, and are respectively arranged circumferentially along the stopcock 3's cavity on the inner wall of the valve body 1 corresponding to the upper and lower bottom surfaces of the stopcock 3. The circumferential flow channels 421 are filled with the tightly fitted circumferential grease-removing sponge 52.

[0041] It is understood that the axial guide groove 411 extends axially along the plug 3, covering the entire length of the sealing interface between the plug 3 and the inner wall of the valve body 1. It is worth noting that the axial guide groove 411 only restricts its two ends to correspond to the upper and lower bottom surfaces of the plug 3 respectively; the area between the two ends can be a curved guide groove. At least two axial guide grooves 411 are provided, for example, four, symmetrically arranged on the inner walls of both sides of the plug receiving cavity of the valve body 1. The circumferential guide groove 421 is located at the interface between the upper and lower bottom surfaces of the plug 3, forming a closed-loop grease supply path to prevent grease loss from the end face due to centrifugal force. By adopting the above technical solution, the combined axial and circumferential layout of the guide channel 4 ensures that the grease can be evenly diffused and cover the entire surface of the plug when the plug 3 rotates.

[0042] Furthermore, the bottom of the axial guide groove 411 is provided with an axial dovetail locking groove 412, and the back of the axial brushing sponge 51 is provided with an axial dovetail buckle 512 that matches the axial dovetail locking groove 412. The axial brushing sponge 51 is fixed in the axial guide groove 411 by engaging the axial dovetail buckle 512 with the axial dovetail locking groove 412.

[0043] The bottom of the circumferential flow guide groove 421 is provided with a circumferential dovetail-shaped locking groove 422, and the back of the circumferential brushing sponge 52 is provided with a circumferential dovetail-shaped buckle 522 that matches the circumferential dovetail-shaped locking groove 422. The circumferential brushing sponge 52 is fixed in the circumferential flow guide groove 421 by the snap-fit ​​between the circumferential dovetail-shaped buckle 522 and the circumferential dovetail-shaped locking groove 422.

[0044] It is understood that both the axial grease sponge 51 and the circumferential grease sponge 52 consist of two parts: a dovetail-shaped clip and a grease sponge. The dovetail-shaped clip is embedded in the dovetail-shaped locking groove at the bottom of the corresponding guide groove for installing and fixing the elastic sponge 5. This design not only prevents the elastic sponge 5 from falling off during the rotation of the stopcock 3, but also facilitates the installation and positioning of the elastic sponge.

[0045] Optionally, the axial grease sponge 51 has a raised axial grease sponge arc surface 511 on the side near the valve 3. The axial grease sponge arc surface 511 contacts the outer surface of the valve 3 to form an interference fit, and the interference fit amount is the thickness of the raised arc surface. The circumferential grease sponge 52 has a raised circumferential grease sponge arc surface 521 on the side near the valve 3. The circumferential grease sponge arc surface 521 contacts the outer surface of the valve 3 to form an interference fit, and the interference fit amount is the thickness of the raised arc surface.

[0046] It is understood that the raised arc surface of the grease-brushing sponge contacts the outer wall of the stopcock 3 with an interference fit, and the radius of curvature of the arc surface is larger than the radius of curvature of the outer surface of the stopcock 3, forming a progressive contact area. During the rotation of the stopcock 3, the elastic sponge 5 generates a periodic compression-rebound motion, forming a micro-pump effect. When the stopcock 3 rotates to the flow state, the elastic sponge 5 is in an interference fit with the outer surface of the stopcock 3, and the stopcock 3 will squeeze the elastic sponge 5, squeezing out the grease to achieve lubrication and sealing; when the stopcock 3 rotates to the closed state, the part of the elastic sponge 5 that is not in contact with the stopcock rebounds to its original state and automatically absorbs excess grease to prevent leakage.

[0047] With this configuration, the elastic sponge 5 is compressed and releases stored grease during the opening and closing of the valve 3, and actively absorbs residual grease upon rebound, achieving synergistic control of micro-lubrication and dynamic recovery. Compared to traditional passive leakage methods, this significantly improves the uniformity of lubrication coverage and grease utilization efficiency, eliminating the phenomena of grease drying or excessive accumulation.

[0048] In some embodiments, the grease injection valve 6 is disposed at at least one junction area between the axial guide groove 411 and the circumferential guide groove 421 on the side wall of the valve body 1.

[0049] It is understandable that the boundary area between the axial guide channel 411 and the circumferential guide channel 421 is determined by the position of the axial guide channel 411, and the number of grease injection valves 6 also depends on the number of axial guide channels 411. For example, if there are two symmetrically distributed axial guide channels 411, then two grease injection valves 6 are respectively set in the boundary area.

[0050] Furthermore, the grease injection valve 6 is located at the junction of the circumferential guide groove 421 and the axial guide groove 411 on the bottom surface of the valve 3.

[0051] It is understandable that in the above technical solution, the grease injection valve 6 is only located in the junction area of ​​the circumferential guide groove 421 and the axial guide groove 411 corresponding to the bottom surface of the valve 3.

[0052] This configuration allows the injected grease to be evenly distributed to the intersection of the axial and circumferential guide grooves 421, forming a multi-path diffusion starting point. This ensures full coverage of the axial guide groove 411 and continuous circumferential replenishment of the circumferential guide groove 421.

[0053] Optionally, the plug 3 has a truncated cone structure with a top radius greater than the bottom radius. The plug 3 has a flow channel 31 in the middle that matches the valve body 1, and elastic sealing rings 32 are provided on the upper and lower sides of the flow channel 31.

[0054] It can be understood that the stopcock 3 is the structure in the stopcock valve that controls the fluid flow rate. The conical surface formed by the truncated cone structure of the stopcock 3 forms a wedge-shaped sealing interface with the inner wall of the valve body 1. The axis of the flow channel 31 of the valve body 1 is collinear with the fluid channel of the valve body 1. The elastic sealing ring 32 can be an elastic sealing structure such as an O-ring, which is embedded in the annular groove of the stopcock 3 by interference fit. When the stopcock 3 rotates, it generates adaptive contact pressure with the valve body 1 to achieve sealing.

[0055] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A grease injection plug valve with a sponge guide groove, comprising a valve body (1), a valve stem (2), and a plug (3), wherein the plug (3) is disposed in the plug receiving cavity of the valve body (1) and is tightly fitted against the inner wall of the valve body (1), and the valve stem (2) is connected to the top of the plug (3) to drive its rotation, characterized in that: The valve body (1) has a flow channel (4) on the inner wall of the plug receiving cavity, and the flow channel (4) is filled with a tightly fitted elastic sponge (5). The elastic sponge (5) contacts the outer wall of the valve (3) and forms an interference fit with the outer wall of the valve (3); The valve body (1) has a grease injection valve (6) on its side wall, and the grease injection valve (6) is connected to the flow guide channel (4) through the grease injection channel (7).

2. The grease injection stopcock valve with sponge guide groove according to claim 1, characterized in that: The flow channel (4) includes an axial flow channel (411) and an circumferential flow channel (421). The elastic sponge (5) includes an axial brushed sponge (51) and a circumferential brushed sponge (52). At least one set of axial flow guide grooves (411) is provided, with two grooves in each set and symmetrically distributed on both sides of the inner wall of the valve body (1) valve receiving cavity along the axial direction of the valve (3). The two ends of the axial flow guide grooves (411) correspond to the upper bottom surface and the lower bottom surface of the valve (3), respectively. The axial guide groove (411) is filled with the tightly fitted axial brush sponge (51). The circumferential guide groove (421) consists of two grooves, which are respectively arranged circumferentially along the valve cavity at the inner wall of the valve body (1) corresponding to the upper and lower bottom surfaces of the valve (3); The circumferential guide groove (421) is filled with the tightly fitted circumferential brush sponge (52).

3. The grease injection stopcock valve with sponge guide groove according to claim 2, characterized in that: The bottom of the axial guide groove (411) is provided with an axial dovetail locking groove (412), and the back of the axial brushing sponge (51) is provided with an axial dovetail buckle (512) that matches the axial dovetail locking groove (412). The axial brushing sponge (51) is fixed in the axial guide groove (411) by the axial dovetail buckle (512) and the axial dovetail locking groove (412). The bottom of the circumferential guide groove (421) is provided with a circumferential dovetail locking groove (422), and the back of the circumferential brush sponge (52) is provided with a circumferential dovetail buckle (522) that matches the circumferential dovetail locking groove (422). The circumferential brush sponge (52) is fixed in the circumferential guide groove (421) by the snap-fit ​​between the circumferential dovetail buckle (522) and the circumferential dovetail locking groove (422).

4. The grease injection stopcock valve with sponge guide groove according to claim 3, characterized in that: The axial grease sponge (51) has a raised axial grease sponge arc surface (511) on the side near the valve (3). The axial grease sponge arc surface (511) contacts the outer surface of the valve (3) to form an interference fit. The interference fit amount is the thickness of the raised arc surface. The circumferential grease sponge (52) has a raised circumferential grease sponge arc surface (521) on the side near the valve (3). The circumferential grease sponge arc surface (521) contacts the outer surface of the valve (3) to form an interference fit. The interference fit amount is the thickness of the raised arc surface.

5. The grease injection stopcock valve with sponge guide groove according to claim 2, characterized in that: The grease injection valve (6) is located at at least one junction area between the circumferential guide groove (421) and the axial guide groove (411) on the side wall of the valve body (1).

6. The grease injection stopcock valve with sponge guide groove according to claim 5, characterized in that: The grease injection valve (6) is located at the junction of the circumferential guide groove (421) and the axial guide groove (411) on the bottom surface of the valve (3).

7. The grease injection stopcock valve with sponge guide groove according to claim 1, characterized in that: The stopcock (3) is a truncated cone structure with a top radius greater than the bottom radius. It has a flow channel (31) in the middle that matches the valve body (1). The flow channel (31) has elastic sealing rings (32) on both the upper and lower sides.

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