Emptying valve with balance type double-valve-element structure
By employing a balanced dual-valve core structure and a conical flow-limiting section design, the problem of valve sealing ring wear in chemical processes is solved, achieving long valve life and efficient operation, and reducing internal leakage and maintenance requirements.
Patent Information
- Application Number
- CN202520571085.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-03-28
AI Technical Summary
In chemical processes, the composition of the medium is complex, and impurities cause wear on the valve sealing rings. Frequent operation exacerbates the wear, reduces sealing performance, and leads to internal leakage and safety risks.
It adopts a balanced dual-valve core structure, eliminating the easily worn balance sealing ring. The pressure balance on both sides of the valve core is achieved through a small valve core. Combined with the conical flow limiting section and sealing ring design, it ensures sealing performance and reduces wear.
Extend valve lifespan, reduce internal leakage and maintenance frequency, maintain good performance, and reduce economic losses and safety risks.
Smart Images
Figure CN223754802U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to vent valve equipment technical field, concretely relates to a balanced double valve core structure vent valve. BACKGROUND
[0002] In the complex and fine chemical production process, as the key process control component, the stable operation of vent valve is crucial to the safety and efficiency of the whole production process.
[0003] However, in the actual production environment, due to the complex medium composition involved in the chemical process, which often contains various impurities, these impurities constantly scour the various components of the valve with the flow of medium. At the same time, according to the process requirement, the valve needs to be frequently opened and closed, and this frequent action further aggravates the wear degree of the balance sealing ring in the valve. When the balance sealing ring is worn, the sealing performance of the valve will be greatly reduced, which will lead to frequent internal leakage of the valve. Therefore, we propose a balanced double valve core structure vent valve to solve the above problems. SUMMARY
[0004] The utility model discloses in order to realize above-mentioned purpose specifically adopts following technical scheme:
[0005] A balanced double valve core structure vent valve, comprising:
[0006] The large valve core valve cage is provided with a column cavity on the upper side of the inside, the bottom of the large valve core valve cage is connected with a large valve core flow guide section, a flow guide channel is connected between the column cavity and the large valve core flow guide section, and a flow limiting hole is opened at both sides of the large valve core flow guide section at equal intervals.
[0007] The small valve core gland is arranged at the upper end of the column cavity, and the side of the small valve core gland is provided with a balance hole.
[0008] The valve rod is slidably inserted in the middle of the small valve core gland, the bottom of the valve rod is connected with a small valve core connecting section, and the bottom of the small valve core connecting section is provided with a small valve core flow limiting section.
[0009] Further, the number of balance holes is four, and the annular array is arranged on the side of the small valve core gland.
[0010] Further, the inside upper side of the column cavity is provided with a mounting ring, and the small valve core gland and the mounting ring are screw connected.
[0011] Further, the bottom of the small valve core gland is provided with a limiting groove, the upper side of the small valve core connecting section is fixedly inserted with a limiting pin, and the limiting pin is slidably embedded in the inside of the limiting groove.
[0012] Further, the small valve core flow limiting section is tapered, and the diameter thereof gradually decreases from the small valve core connecting section to the other side.
[0013] Further, a sealing ring is arranged at the connection between the small valve core connecting section and the valve rod.
[0014] The utility model discloses the beneficial effect is as follows:
[0015] The utility model discloses cancel the balance sealing ring of easy wearing, on one hand increases small valve core and realizes the pressure balance of both sides of valve core, and the economic loss and the safety risk reduction caused by valve internal leakage are prevented, and the component wear caused by impurity scouring and frequent action is reduced simultaneously, so that the valve can keep good performance state in the long -term use, greatly prolongs the service life of valve, reduces the frequent replacement and maintenance work of being carried out because of valve damage, and the practicality is higher. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is the three-dimensional structure schematic diagram of the utility model;
[0017] Figure 2 It is the overhead schematic diagram of the utility model;
[0018] Figure 3 It is the utility model Figure 2 A-A direction section view schematic diagram of the utility model;
[0019] Figure 4 It is the valve rod structure schematic diagram of the utility model.
[0020] Reference signs: 1, big valve core cage;101, column cavity;102, flow guide channel;2, big valve core flow guide section;201, flow limiting hole;3, small valve core gland;301, balance hole;302, limit slot;4, valve rod;5, small valve core connecting section;501, limit pin;502, sealing ring;6, small valve core flow limiting section;7, mounting ring. DETAILED DESCRIPTION
[0021] In order to make the purpose, technical scheme and advantage of the utility model embodiment more clear, the technical scheme in the utility model embodiment will be clearly and completely described below in combination with the drawings in the utility model embodiment.
[0022] The application provides a balanced double-valve core structure vent valve, which is mainly used for solving the problem that the existing technology is related to complex medium components in a chemical process, wherein various impurities are often contained, and the impurities continuously erode various parts of the valve along with the flow of the medium. At the same time, according to the process requirement, the valve needs to be frequently opened and closed, and the frequent action further aggravates the wear degree of the balance sealing ring in the valve. When the balance sealing ring is worn, the sealing performance of the valve will be greatly reduced, thereby causing frequent internal leakage of the valve, and the following technical scheme is provided, and the application will be described in detail below. Figures 1-4 The application will be described in detail as follows:
[0023] A balanced double-valve core structure vent valve comprises:
[0024] A large valve core valve cage 1 is internally provided with a column cavity 101 on the upper side, the bottom of the large valve core valve cage 1 is connected with a large valve core flow guide section 2, a flow guide channel 102 is connected between the column cavity 101 and the large valve core flow guide section 2, and flow limiting holes 201 are equidistantly arranged on the two sides of the large valve core flow guide section 2.
[0025] A small valve core gland 3 is arranged at the upper end of the column cavity 101, and balance holes 301 are arranged on the side of the small valve core gland 3.
[0026] A valve rod 4 is slidably inserted in the middle of the small valve core gland 3, the bottom of the valve rod 4 is connected with a small valve core connecting section 5, and the bottom of the small valve core connecting section 5 is provided with a small valve core flow limiting section 6.
[0027] It should be noted that a large valve core valve seat (not shown in the figure) is fixed on the valve body.
[0028] Working principle and process:
[0029] When the valve is closed, the valve rod 4 moves downward to push the small valve core flow limiting section 6 into the flow guide channel 102 to form a seal, and at the same time, the large valve core moves downward to form a seal with the large valve core valve seat, and the medium flows from the bottom.
[0030] When the valve is opened, the valve rod 4 moves upward due to the unbalanced pressure in the upper and lower cavities of the valve core, the valve rod 4 drives the small valve core flow limiting section 6 to move upward and separate from the flow guide channel 102, the medium passes through the flow limiting holes 201 of the large valve core flow guide section 2, so that the pressure in the upper and lower cavities of the valve is balanced, the movement resistance of the large valve core flow guide section 2 is reduced after balancing, the small valve core connecting section 5 moves to the uppermost side to drive the large valve core flow guide section 2 to separate from the large valve core valve seat, and pressure or flow regulation is performed.
[0031] The balanced double-valve core structure vent valve cancels the easily-worn balance sealing ring, on the one hand, increases the small valve core to realize the pressure balance on both sides of the valve core, eliminates the economic loss and safety risk caused by the valve leakage, at the same time, reduces the component wear caused by impurities scouring and frequent operation, so that the valve can maintain good performance state in the long-term use process, greatly prolongs the service life of the valve, reduces the frequent replacement and maintenance work caused by the damage of the valve, and has high practicability.
[0032] As shown in Figure 2 some embodiments, the number of balance holes 301 is four, and the annular array is arranged on the side of the small valve core gland 3, more specifically, the plurality of balance holes 301 work simultaneously, which can increase the number of medium flow channels in the valve core, so that the pressure between the upper and lower cavities of the valve core can be balanced more quickly, and when the valve needs to be opened or closed, the valve core can respond to the pressure change in a shorter time and quickly adjust the position to realize accurate adjustment of pressure or flow.
[0033] As shown in Figure 3 some embodiments, the inside upper side of the column cavity 101 is provided with a mounting ring 7, and the small valve core gland 3 is threadedly connected with the mounting ring 7, more specifically, the mounting ring 7 is arranged on the inside upper side of the column cavity 101 and is threadedly connected with the small valve core gland 3, so that the small valve core gland 3 can be conveniently installed into the column cavity 101 during assembly of the valve, and during use and maintenance of the valve, the small valve core gland 3 may need to be adjusted or replaced, and the threaded connection allows the worker to easily realize this operation by rotating the small valve core gland 3 without using complex tools or equipment.
[0034] As shown in Figure 3 some embodiments, the bottom of the small valve core gland 3 is provided with a limiting groove 302, and the upper side of the small valve core connecting section 5 is fixedly penetrated with a limiting pin 501, and the limiting pin 501 is slidingly embedded in the inside of the limiting groove 302, more specifically, the limiting pin 501 is slidingly embedded in the inside of the limiting groove 302, which provides a clear guide path for the up-down movement of the small valve core connecting section 5, and during operation of the valve, the small valve core connecting section 5 needs to accurately move along the vertical direction to realize opening and closing of the valve, and this guiding action can effectively avoid inclination or deviation of the small valve core connecting section 5 during movement, thereby ensuring the verticality of the overall movement of the valve stem 4 and the small valve core.
[0035] As shown in Figure 4As shown, in some embodiments, the small valve core flow-limiting section 6 is conical, and its diameter gradually decreases from near the small valve core connecting section 5 to the other side. More specifically, when the small valve core flow-limiting section 6 is conical and its diameter gradually decreases and it is embedded inside the guide tube channel, a certain interference fit is formed between the flow-limiting section and the guide tube channel in the assembled state. Due to the characteristics of the cone shape, the larger diameter end contacts the inner wall of the guide tube channel first, and as it goes deeper, the smaller diameter end further fits tightly against the channel, generating radial pressure, thereby forming a tight sealing connection between the two. This interference fit is similar to applying a uniform squeezing force between two parts, forcing them to fit tightly together, effectively preventing the leakage of the medium in the gap.
[0036] like Figure 3 As shown, in some embodiments, a sealing ring 502 is provided at the connection between the small valve core connecting section 5 and the valve stem 4. More specifically, the sealing ring 502 plays a key sealing role at the connection between the small valve core connecting section 5 and the valve stem 4, preventing fluid from leaking along the gap between the valve stem 4 and the small valve core gland 3.
[0037] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A balanced dual spool structure vent valve, characterized by, Include: Big valve core cage (1), the inside upper side of the big valve core cage (1) is provided with the column cavity (101), the bottom of the big valve core cage (1) is connected with big valve core flow guide section (2), the column cavity (101) is connected with flow guide channel (102) between big valve core flow guide section (2), the both sides of the big valve core flow guide section (2) are equidistantly provided with flow limiting hole (201); Small valve core gland (3) is arranged at the upper end of the column cavity (101), the side of the small valve core gland (3) is provided with balance hole (301); Valve stem (4) is inserted in the middle of the small valve core gland (3), the bottom of the valve stem (4) is connected with small valve core connecting section (5), the bottom of the small valve core connecting section (5) is provided with small valve core flow limiting section (6).
2. The balanced dual spool structure vent valve according to claim 1, characterized in that, The number of balance holes (301) is four, and the annular array is arranged on the side of the small valve core gland (3).
3. The balanced dual spool structure vent valve according to claim 1, characterized in that, The inside upper side of the column cavity (101) is provided with mounting ring (7), and the small valve core gland (3) and the mounting ring (7) are screw connected.
4. The balanced dual spool structure vent valve according to claim 1, characterized in that, The bottom of the small valve core gland (3) is provided with limit groove (302), the upper side of the small valve core connecting section (5) is fixedly inserted with limit pin (501), and the limit pin (501) is slidably embedded in the inside of the limit groove (302).
5. The balanced dual spool structure vent valve according to claim 1, characterized in that, The small valve core flow limiting section (6) is tapered, and the caliber gradually decreases from the side close to the small valve core connecting section (5) to the other side.
6. The balanced dual spool structure vent valve according to claim 1, characterized in that, The connection between the small valve core connecting section (5) and the valve stem (4) is provided with sealing ring (502).