Valve element guide structure and valve

Abstract

The utility model provides a valve core guiding structure and a valve, the valve core guiding structure comprises a valve rod, the cross section of the valve rod is a regular polygon, or the cross section of the valve rod is a circle, and the side surface of the cylindrical valve rod is at least provided with two guiding planes; a guide hole allowing the valve rod to penetrate through is formed in the middle of the guide supporting body, the cross section of the guide hole is matched with the cross section of the valve rod, and each guide face of the guide hole is provided with a buffering guide roller assembly in a matched mode so that the valve rod and the buffering guide roller assemblies can be guided through a rolling pair and can absorb buffering force; abrasion can be effectively reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a valve core guiding structure and valve. Background Technology

[0002] Because valves need to open and close according to operating conditions, a corresponding guide structure is usually required to ensure the stable opening and closing of the valve core. Traditional valve guidance only relies on a suitable gap between the valve core shaft and the guide hole for sliding guidance. The sliding mating pair relies on the mutual friction between the surfaces of the parts to achieve repeated movement. Sometimes there is also relative rotational movement between the parts. When the sliding speed between the parts is fast, the working environment is dirty, or there is a certain degree of corrosion and vibration, the surface wear of the parts is large, the resistance is high, and the life of the parts is short. Especially for check valves used in high pressure differential, the frequent opening and the large impact force make the valve stem wear faster and prone to jamming.

[0003] Therefore, there is an urgent need for a valve core guiding structure and valve that can effectively reduce wear and improve service life. Utility Model Content

[0004] The purpose of this invention is to provide a valve core guide structure and valve, aiming to solve the technical problems of easy wear and short service life of traditional valve guide structures.

[0005] To achieve the above objectives, in a first aspect, this utility model provides a valve core guide structure, comprising:

[0006] The valve stem has a cross-section that is a regular polygon or a circle, and the cylindrical valve stem has at least two guide planes on its side.

[0007] The guide support has a guide hole in its middle for the valve stem to pass through, and the cross-section of the guide hole is matched with the cross-section of the valve stem.

[0008] Each guide surface of the guide hole is respectively matched with a buffer guide roller assembly, so that the valve stem and the buffer guide roller assembly are guided by a rolling pair and can absorb the buffer force.

[0009] As a further improvement to the above solution, when the cross-section of the valve stem is circular, if two guide planes are provided, the two guide planes are symmetrically arranged about the valve stem axis.

[0010] If there are two or more guide planes, the multiple guide planes are evenly distributed around the valve stem circumferentially.

[0011] As a further improvement to the above scheme, when the cross-section of the valve stem is a regular polygon, the valve stem is one of a regular trihedron, a regular tetrahedron, a regular pentahedron, or a regular hexahedron.

[0012] As a further improvement to the above solution, the buffer guide roller assembly includes a rotating shaft and rollers rotatably mounted on the rotating shaft, as well as an elastic element for abutting against the outer wall of the rotating shaft.

[0013] The elastic element is disposed on the side of the rotating shaft away from the valve stem, and the outer edge of the roller extends beyond the corresponding guide surface.

[0014] As a further improvement to the above solution, the elastic element is made of either Inconel alloy or fluororubber.

[0015] As a further improvement to the above solution, the buffer guide roller assembly includes a rotating shaft, an elastic sleeve sleeved on the outer wall of the rotating shaft, and a roller rotatably disposed outside the elastic sleeve.

[0016] As a further improvement to the above solution, the elastic sleeve is made of elastic rubber material.

[0017] As a further improvement to the above solution, the roller is a bearing; preferably, the bearing is a ceramic bearing.

[0018] Secondly, this utility model also provides a valve, including a valve body guide structure as described in the first aspect.

[0019] Because this utility model adopts the above technical solutions, the beneficial effects of this application are as follows:

[0020] This utility model provides a valve core guiding structure, including a valve stem and a guide support. The valve stem has a regular polygonal cross-section or a circular cross-section, and the cylindrical valve stem has at least two guide planes on its side. The guide support has a guide hole in the middle for the valve stem to pass through, and the cross-section of the guide hole matches the cross-section of the valve stem. Each guide surface of the guide hole is respectively equipped with a buffer guide roller assembly, so that the valve stem and the buffer guide roller assembly are guided by a rolling pair and can absorb buffering force. The setting of the buffer guide roller assembly first transforms the traditional sliding friction pair of the valve stem into a rolling friction pair for guidance, which can greatly reduce the friction force between the valve stem and the guide support. The friction between them reduces wear; in addition, when strong impacts or unbalanced loads occur, the valve stem of the buffer guide roller assembly has a regular polygonal cross-section or at least two guide planes, and the buffer guide roller assembly is provided on each guide plane. Multiple buffer guide roller assemblies can provide strong guidance and stable limiting, ensuring smooth up-and-down reciprocating operation of the valve stem. At the same time, since the guide hole and valve stem have a square fit, the valve stem will not rotate; furthermore, the buffer guide roller assembly is provided with elastic elements or elastic sleeves, which can effectively buffer the impact of the valve stem on the rollers in the buffer guide roller assembly, thereby improving the valve core guiding structure and the life of the corresponding valve. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a cross-sectional view of a valve core guide structure disclosed in this utility model. Figure 1 ;

[0023] Figure 2 This is a cross-sectional view of a valve core guide structure disclosed in this utility model. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of a valve core guide structure disclosed in this utility model. Figure 3 ;

[0025] Figure label:

[0026] 1. Valve stem; 11. Guide plane; 2. Guide support body; 21. Guide hole; 211. Guide surface; 3. Buffer guide roller assembly; 31a. Rotating shaft; 32a. Roller; 33a. Elastic element; 31b. Rotating shaft; 32b. Roller; 33b. Elastic sleeve.

[0027] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0031] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0032] Example 1

[0033] See Figure 1 This utility model provides a valve core guide structure, comprising:

[0034] The valve stem 1 has a circular cross-section, and the side of the cylindrical valve stem 1 is provided with at least two guide planes 11; specifically, when the cross-section of the valve stem 1 is circular, if two guide planes 11 are provided, the two guide planes 11 are symmetrically arranged about the axis of the valve stem 1.

[0035] If there are two or more guide planes 11, the multiple guide planes 11 are evenly distributed around the valve stem 1; in this embodiment, there are 4 guide planes 11, and the four guide planes 11 are evenly distributed around the valve stem 1.

[0036] The guide support 2 has a guide hole 21 in its middle for the valve stem 1 to pass through, and the cross-section of the guide hole 21 is matched with the cross-section of the valve stem 1.

[0037] Each guide surface 211 of the guide hole 21 is respectively matched with a buffer guide roller assembly 3, so that the valve stem 1 and the buffer guide roller assembly 3 are guided by the rolling pair and can absorb the buffer force;

[0038] The buffer guide roller assembly 3 firstly transforms the traditional sliding friction pair of the valve stem 1 into a rolling friction pair for guidance, which greatly reduces the friction between the valve stem 1 and the guide support 2, thereby reducing wear. Secondly, when strong impacts or unbalanced loads occur, the valve stem 1 of the buffer guide roller assembly 3 has a regular polygonal cross-section or at least two guide planes 11, with the buffer guide roller assembly 3 installed on each guide plane 11. Multiple buffer guide roller assemblies 3 provide strong guidance and stable limiting, ensuring smooth up-and-down reciprocating operation of the valve stem 1. Furthermore, because the guide hole 21 has a square fit with the valve stem 1, the valve stem 1 will not rotate. Moreover, the buffer guide roller assembly 3 is equipped with an elastic element or elastic sleeve, which effectively buffers the impact of the valve stem 1 on the rollers 32a / 32b in the buffer guide roller assembly 3, thereby improving the valve core guiding structure and the lifespan of the corresponding valve.

[0039] As a preferred embodiment, see Figure 1 The buffer guide roller assembly 3 includes a rotating shaft 31a and a roller 32a rotatably disposed on the rotating shaft 31a, as well as an elastic member 33a for abutting against the outer wall of the rotating shaft 31a;

[0040] The elastic element 33a is disposed on the side of the rotating shaft 31a away from the valve stem 1, and the outer edge of the roller 32a extends beyond the corresponding guide surface 211;

[0041] In this embodiment, elastic elements 33a are respectively provided on the two ends of the rotating shaft 31a away from the valve stem 1; in order to match the shape of the valve stem 1, four sets of buffer guide roller assemblies 3 are provided, and correspondingly, each guide surface 211 of the guide hole 21 of the guide support body 2 is provided with a mounting hole for installing the buffer guide roller assembly 3; during installation, after each buffer guide roller assembly 3 is installed in the corresponding mounting hole, the buffer guide roller assembly 3 is detachably fixed in the corresponding mounting hole by a pressure block;

[0042] Preferably, the elastic element 33a is made of one of Inconel alloy and fluororubber;

[0043] The elastic element 33a can also be composed of springs with different elastic coefficients in sections;

[0044] The elastic element 33a is designed so that when an impact force or a strong unbalanced load occurs, the force is transmitted to the rotating shaft 31a through the roller 32a, and then transmitted to the elastic element 33a and absorbed by the elastic element 33a. This effectively buffers the impact of the valve stem 1 on the roller 32a in the buffer guide roller assembly 3, thereby improving the service life of the valve core guide structure.

[0045] In some preferred embodiments, the buffer guide roller assembly 3 includes a rotating shaft 31b, an elastic sleeve 33b sleeved on the outer wall of the rotating shaft 31b, and a roller 32b rotatably disposed outside the elastic sleeve. The elastic sleeve 33b is made of elastic rubber material. When an impact force or a strong unbalanced load occurs, the force is transmitted to the elastic sleeve 33b through the roller 32b. Most of the force is absorbed by the elastic sleeve 33b, and only a small part of the force is transmitted to the rotating shaft 31b. The setting of the elastic sleeve 33b can effectively reduce the impact of the valve stem 1 on the buffer guide roller assembly 3, reduce wear, and thus improve the service life of the valve core guide structure.

[0046] In a preferred embodiment, the rollers 32a / 32b are bearings; preferably, the bearings 32a / 32b are ceramic bearings.

[0047] Example 2

[0048] See Figure 2 and Figure 3 This utility model provides a valve core guide structure, comprising:

[0049] The valve stem 1 has a cross-section that is a regular polygon. The valve stem 1 is one of a regular trihedron, a regular tetrahedron, a regular pentahedron, or a regular hexahedron. In this embodiment, the valve stem 1 is a regular tetrahedron, that is, it has four guide planes 11.

[0050] The guide support 2 has a guide hole 21 in its middle for the valve stem 1 to pass through, and the cross-section of the guide hole 21 is matched with the cross-section of the valve stem 1.

[0051] Each guide surface 211 of the guide hole 21 is respectively matched with a buffer guide roller assembly 3, so that the valve stem 1 and the buffer guide roller assembly 3 are guided by the rolling pair and can absorb the buffer force;

[0052] The buffer guide roller assembly 3 firstly transforms the traditional sliding friction pair of the valve stem 1 into a rolling friction pair for guidance, which greatly reduces the friction between the valve stem 1 and the guide support 2, thereby reducing wear. Secondly, when strong impacts or unbalanced loads occur, the valve stem 1 of the buffer guide roller assembly 3 has a regular polygonal cross-section or at least two guide planes 11, with the buffer guide roller assembly 3 installed on each guide plane 11. Multiple buffer guide roller assemblies 3 provide strong guidance and stable limiting, ensuring smooth up-and-down reciprocating operation of the valve stem 1. Simultaneously, because the guide hole 21 has a square fit with the valve stem 1, the valve stem 1 will not rotate. Furthermore, the buffer guide roller assembly 3 is equipped with an elastic element 33a or an elastic sleeve 33b, which effectively buffers the impact of the valve stem 1 on the rollers 32a / 32b in the buffer guide roller assembly 3, thereby improving the valve core guiding structure and the lifespan of the corresponding valve.

[0053] In this embodiment, the buffer guide roller assembly 3 is configured the same as in embodiment 1, specifically as follows: Figure 2 and Figure 3 The two different structures shown will not be described in detail here.

[0054] Example 3

[0055] This utility model also provides a valve, including a valve core guide structure, a valve core, and a valve seat as described in Embodiment 1 or Embodiment 2. The valve core includes a valve core body and a valve stem 1 disposed on the valve core body, and the valve seat has the guide support 2. In this embodiment, a feed pump check valve is used as an example for illustration. Traditionally, the normal operating conditions of the feed pump check valve are: valve core pressure difference 0~3MPa, 200 degrees Celsius slurry, sometimes exhibiting weak corrosion, and the valve core opening and closing about 30 times per minute.

[0056] Traditional check valves rely on sliding friction between the valve core and its support, with the guide hole 21 and valve stem 1 experiencing entirely sliding friction. Furthermore, the mating pair lacks a limiting structure, and the valve core may rotate. The clearance is on the order of millimeters, resulting in poor stability and high wear. In contrast, the valve core guiding structure provided by this invention utilizes rolling friction between the guide hole 21 and valve stem 1, creating a precision mating pair with excellent stability. The friction on the valve stem 1 is significantly less than the sliding friction of traditional check valves.

[0057] When the valve stem 1 undergoes frequent reciprocating motion and becomes significantly unbalanced, it deviates in one direction, compressing the rollers. The rollers then push the shaft off course, compressing the elastic element or sleeve until the valve stem 1 makes hard contact with the guide hole 21. This achieves stable, strong guidance and limiting of the valve stem 1 by the guide support 2, ensuring the check valve remains in normal operating condition. Because the rollers 32a / 32b are elastic supports, they buffer the unbalanced operation of the valve stem 1. Simultaneously, due to the square fit between the guide hole 21 and the valve stem 1, the valve stem 1 will not rotate.

[0058] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A valve core guide structure, characterized in that, include: The valve stem has a cross-section that is a regular polygon or a circular cross-section, and the cylindrical valve stem has at least two guide planes on its side. The guide support has a guide hole in its middle for the valve stem to pass through, and the cross-section of the guide hole is matched with the cross-section of the valve stem. Each guide surface of the guide hole is respectively matched with a buffer guide roller assembly, so that the valve stem and the buffer guide roller assembly are guided by a rolling pair and can absorb the buffer force.

2. The valve core guide structure according to claim 1, characterized in that, When the cross-section of the valve stem is circular, if two guide planes are provided, the two guide planes are symmetrically arranged about the valve stem axis; If there are two or more guide planes, the multiple guide planes are evenly distributed around the valve stem circumferentially.

3. The valve core guide structure according to claim 1, characterized in that, When the cross-section of the valve stem is a regular polygon, the valve stem is one of a regular trihedron, a regular tetrahedron, a regular pentahedron, or a regular hexahedron.

4. A valve core guide structure according to any one of claims 1-3, characterized in that, The buffer guide roller assembly includes a rotating shaft and rollers rotatably mounted on the rotating shaft, as well as an elastic element for abutting against the outer wall of the rotating shaft; The elastic element is located on the side of the rotating shaft away from the valve stem.

5. A valve core guide structure according to claim 4, characterized in that, The elastic element is made of either Inconel alloy or fluororubber.

6. A valve core guide structure according to any one of claims 1-3, characterized in that, The buffer guide roller assembly includes a rotating shaft, an elastic sleeve sleeved on the outer wall of the rotating shaft, and a roller rotatably disposed outside the elastic sleeve.

7. A valve core guide structure according to claim 6, characterized in that, The elastic sleeve is made of elastic rubber material.

8. A valve core guide structure according to claim 4, characterized in that, The roller is a bearing.

9. A valve core guide structure according to claim 6, characterized in that, The roller is a bearing.

10. A valve, characterized in that, Includes a valve core guide structure as described in any one of claims 1-9.

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