Regulating valve with throttling function
By setting multiple throttling rings on the inner wall of the valve seat of the regulating valve, the media undergoes multiple throttlings, which solves the problem of increasing the flow rate and pressure of the medium in the existing regulating valve, resulting in a decrease in sealing performance and noise, and achieves durability of sealing performance and noise reduction.
Patent Information
- Application Number
- CN202520904508.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2025-06-13
- Estimated Expiration
- 2035-05-09
AI Technical Summary
When the medium flows through the existing regulating valves, the medium flow rate and pressure increase, causing faster wear on the sealing surface, decreased sealing and noise.
A regulating valve with throttling function is designed. The inner wall of the valve seat is provided with a first throttling ring, a second throttling ring and a third throttling ring distributed in the axial direction. The medium flows through the third throttling ring, the second throttling ring and the first throttling ring, and the medium flow rate and pressure are reduced through multiple directions and speed changes.
By throtting the medium multiple times, the flushing force of the medium on the interleaving part, the sealing part and the valve seat is reduced, ensuring the durability of the sealing performance, and reducing the noise generated by the medium during the opening and closing of the valve core.
Smart Images
Figure CN222977563U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of regulating valves, and more specifically to a regulating valve with a throttling function. Background Art
[0002] A regulating valve is a device used to change the amount of gas or liquid passing through and achieve a certain need. It is a precision control instrument, usually composed of a main control device and other auxiliary parts. It only needs to receive the signal from the regulating instrument to realize the switch action, thereby achieving the desired purpose.
[0003] Reference Figure 1 As shown, the valve core of the existing regulating valve includes a connecting portion connected to the valve stem, a sealing portion that can fit with the valve seat and an interpenetrating portion that penetrates the valve seat. The outer surface of the interpenetrating portion is approximately a hemispherical surface. In the process of the interpenetrating portion gradually penetrating the valve seat, the distance between the inner wall of the valve seat and the outer surface of the interpenetrating portion gradually decreases, causing the flow rate of the medium flowing through the sealing portion and the valve seat to become faster and the pressure to become larger, resulting in accelerated wear of the sealing surface between the sealing portion and the valve seat, resulting in a decrease in sealing performance, and the surface wear of the interpenetrating portion of the valve core is accelerated, causing the flow rate of the medium flowing through the valve seat and the interpenetrating portion to further increase, resulting in further accelerated wear between the sealing portion and the valve seat, and noise is generated at the same time. Utility Model Content
[0004] In view of the deficiencies in the prior art, the utility model aims to provide a regulating valve which can slow down the flow rate and pressure of the medium and ensure stable sealing.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a regulating valve with a throttling function, comprising a valve body, a valve seat positioned in the valve body and a valve core that forms a hard seal with the valve seat, the valve core comprising a connecting portion, a sealing portion and an interlaced portion that are connected in sequence, the inner wall of the valve seat is provided with a first throttling ring, a second throttling ring and a third throttling ring that are distributed along the axial direction of the valve seat and are coaxial with the valve seat, the first throttling ring, the second throttling ring and the third throttling ring are all arranged away from the sealing surface of the valve seat and the third throttling ring is close to the orifice of the inner hole of the valve seat, when the interlaced portion gradually penetrates into the inner wall of the valve seat, the medium flows through the third throttling ring, the second throttling ring and the first throttling ring in turn.
[0006] As a further improvement of the utility model, the first throttling ring is provided with a plurality of first throttling ports which are circumferentially distributed around the axis of the valve seat, the second throttling ring is provided with a plurality of second throttling ports which are circumferentially distributed around the axis of the valve seat and staggered with the first throttling ports, and the third throttling ring is provided with a plurality of third throttling ports which are circumferentially distributed around the axis of the valve seat and staggered with the second throttling ports, so that the medium undergoes multiple changes in direction and speed by flowing through the third throttling ports, the second throttling ports and the first throttling ports in sequence.
[0007] As a further improvement of the present utility model, the inner diameters of the first throttle ring, the second throttle ring, and the third throttle ring increase in sequence.
[0008] As a further improvement of the present utility model, the thicknesses of the first throttle ring, the second throttle ring, and the third throttle ring increase in sequence.
[0009] The beneficial effects of the present utility model are as follows: By allowing the medium to flow through the third throttle ring, the second throttle ring, and the first throttle ring in sequence, the medium can be throttled multiple times. Such a design can throttle the medium flowing through the surface of the insertion part compared with the prior art, thereby reducing the pressure and flow rate of the medium, slowing down the scouring force of the medium on the surface of the insertion part, the sealing part, and the valve seat, ensuring the stability of the structures of the insertion part, the sealing part, and the valve seat, indirectly ensuring the durability of the sealing performance, and at the same time reducing the noise generated by the medium during the opening and closing process of the valve core. Description of the Drawings
[0010] Figure 1 is a schematic structural diagram of the prior art;
[0011] Figure 2 is a schematic structural diagram of the present utility model;
[0012] Figure 3 is Figure 2 an enlarged view of part A in
[0013] Figure 4 is a three-dimensional view of the valve seat in the present utility model.
[0014] Reference numerals in the drawings: 1, valve body; 2, valve seat; 3, valve core; 31, connecting part; 32, sealing part; 33, insertion part; 4, first throttle ring; 41, first throttle port; 5, second throttle ring; 51, second throttle port; 6, third throttle ring; 61, third throttle port. Detailed Embodiments
[0015] The present utility model will be further described in detail below with reference to the drawings and embodiments. The same components are denoted by the same reference numerals.
[0016] Referring to Figures 1 to 4 as shown, a throttle valve with a throttling function in this embodiment includes a valve body 1, a valve seat 2 positioned inside the valve body 1, and a valve core 3 that forms a hard seal with the valve seat 2. The valve core 3 includes a connecting part 31, a sealing part 32, and an insertion part 33 that are connected in sequence;
[0017] Based on the foregoing prior art, a first throttle ring 4, a second throttle ring 5, and a third throttle ring 6 coaxial with the valve seat 2 are integrally formed on the inner wall of the valve seat 2. The third throttle ring 6 is located at the orifice of the inner hole of the valve seat 2 where no sealing surface is machined. The third throttle ring 6, the second throttle ring 5, and the first throttle ring 4 are sequentially distributed along the axial direction of the valve seat 2. The first throttle ring 4 is away from the orifice of the inner hole of the valve seat 2 where the sealing surface is machined.
[0018] In the initial state, the valve core 3 is away from the valve seat 2, and the medium passes through the valve seat 2 from bottom to top and flows to one side of the valve body 1. During the process of the valve core 3 closing relative to the valve seat 2, the valve core 3 moves downward, and the insertion part 33 first extends into the inner cavity of the valve seat 2. A narrow flow channel for the medium to flow through is formed between the outer wall of the insertion part 33 and the inner wall of the valve seat 2. As the insertion part 33 continues to penetrate into the valve seat 2, the insertion part 33 sequentially passes through the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6. The first throttle ring 4, the second throttle ring 5, and the third throttle ring 6 all form flow channels with smaller distances from the outer wall of the insertion part 33. The medium flowing through the distance between the third throttle ring 6 and the insertion part 33 is throttled for the first time. Then the medium enters the relatively wide space between the third throttle ring 6 and the second throttle ring 5 to decelerate and depressurize and fill the space between the third throttle ring 6 and the second throttle ring 5. Subsequently, the medium flowing through the distance between the second throttle ring 5 and the insertion part 33 is throttled for the second time. Then the medium enters the relatively wide space between the second throttle ring 5 and the first throttle ring 4 to decelerate and fill the space between the second throttle ring 5 and the first throttle ring 4. Then the medium flowing through the distance between the first throttle ring 4 and the insertion part 33 is throttled for the third time. Then the medium enters the space above the first throttle ring 4 and flows to the gap between the sealing part 32 and the valve seat 2 until the sealing part 32 is in close contact with the valve seat 2, and the insertion part 33 is inserted in place in the valve seat 2. There are distances between the inner walls of the third throttle ring 6, the second throttle ring 5, and the first throttle ring 4 and the outer surface of the insertion part 33, and the medium fills the space below the sealing part 32. During the process of the valve core 3 opening relative to the valve seat 2, the medium flows through the gap between the sealing part 32 and the valve seat 2 at a relatively gentle flow rate and pressure under the action of the throttling of the third throttle ring 6, the second throttle ring 5, and the first throttle ring 4 in sequence. As the valve core 3 continues to move upward, the distance between the sealing part 32 and the valve seat 2 becomes larger and larger, and the scouring force of the medium on the sealing part 32 and the valve seat 2 becomes smaller and smaller until the valve core 3 is opened in place and the medium returns to the initial state.
[0019] Such a design can throttle the medium flowing through the surface of the insertion part 33 compared with the prior art, thereby reducing the pressure and flow rate of the medium, slowing down the scouring force of the medium on the surface of the insertion part 33, the sealing part 32, and the valve seat 2, ensuring the structural stability of the insertion part 33, the sealing part 32, and the valve seat 2, indirectly ensuring the durability of the sealing performance, and at the same time reducing the noise generated by the medium during the opening and closing process of the valve core 3.
[0020] As a specific embodiment of the improvement, refer to Figure 4 As shown, through the cutting process, a plurality of first throttle ports 41, second throttle ports 51, and third throttle ports 61 that are circumferentially distributed around the axis of the valve seat 2 are respectively machined on the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6. The first throttle port 41 and the third throttle port 61 are both offset from the second throttle port 51, that is, the first throttle port 41, the second throttle port 51, and the third throttle port 61 are not on the same vertical line. During the opening and closing process of the valve core 3, when the medium flows through the space between the third throttle ring 6 and the insertion portion 33, it also flows through the third throttle port 61. After the space between the third throttle ring 6 and the second throttle ring 5 is filled, when the medium flows through the space between the second throttle ring 5 and the insertion portion 33, it also flows through the second throttle port 51. After the space between the second throttle ring 5 and the first throttle ring 4 is filled, when the medium flows through the space between the first throttle ring 4 and the insertion portion 33, it also flows through the first throttle port 41. Subsequently, the medium flows into the gap between the sealing portion 32 and the valve seat 2. The medium can be divided into two parts during the flowing process. One part flows along the surface of the insertion portion 33, and the other part flows along the inner wall of the valve seat 2 and successively flows through the third throttle port 61, the second throttle port 51, and the first throttle port 41. The medium undergoes multiple changes in direction and speed. Such a design can increase the complexity of the internal flow of the medium, thereby reducing the overall speed and pressure of the medium, further improving the throttling effect, and slowing down the erosion of the insertion portion 33, the sealing portion 32, and the valve seat 2 by the medium.
[0021] As a specific embodiment of the improvement, refer to Figure 3 and Figure 4 As shown, the inner diameters of the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6 increase in sequence. Then, the distances formed by the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6 and the insertion portion 33 are similar or the same. The third throttle ring 6 can play a greater throttling role, reducing the subsequent impact of the medium on the second throttle ring 5. Then, the throttling role of the second throttle ring 5 reduces the subsequent impact of the medium on the first throttle ring 4. Such a design can perform hierarchical throttling on the medium according to the different structural strengths of the third throttle ring 6, the second throttle ring 5, and the third throttle ring 4, thereby ensuring the impact resistance of each throttle ring and extending the service life of each throttle ring.
[0022] As a specific embodiment of the improvement, refer to Figure 3 and Figure 4 As shown, the thicknesses of the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6 increase in sequence. Such a design can increase the structural strengths of the first throttle ring 4, the second throttle ring 5, and the third throttle ring 6 to different degrees, thereby having different impact resistances, ensuring the structural stability of each throttle ring, and extending the service life of each throttle ring.
[0023] The above are only the preferred embodiments of the present utility model. The protection scope of the present utility model is not limited to the above embodiments. All technical solutions falling within the concept of the present utility model belong to the protection scope of the present utility model. It should be noted that for those of ordinary skill in the art, several improvements and refinements made without departing from the principle of the present utility model should also be regarded as within the protection scope of the present utility model.
Claims
1. A regulating valve with a throttling function, comprising a valve body (1), a valve seat (2) positioned in the valve body (1), and a valve core (3) forming a hard seal with the valve seat (2), wherein the valve core (3) comprises a connecting portion (31), a sealing portion (32), and an interpenetrating portion (33) connected in sequence, characterized in that: The inner wall of the valve seat (2) is provided with a first throttling ring (4), a second throttling ring (5) and a third throttling ring (6) which are distributed along the axial direction of the valve seat (2) and are coaxial with the valve seat (2); the first throttling ring (4), the second throttling ring (5) and the third throttling ring (6) are all arranged away from the sealing surface of the valve seat (2) and the third throttling ring (6) is close to the orifice of the inner hole of the valve seat (2); when the insertion portion (33) gradually penetrates into the inner wall of the valve seat (2), the medium is throttled successively through the third throttling ring (6), the second throttling ring (5) and the first throttling ring (4).
2. A regulating valve with throttling function according to claim 1, characterized in that: The first throttling ring (4) is provided with a plurality of first throttling openings (41) which are distributed in a circular pattern around the axis of the valve seat (2); the second throttling ring (5) is provided with a plurality of second throttling openings (51) which are distributed in a circular pattern around the axis of the valve seat (2) and are staggered from the first throttling openings (41); the third throttling ring (6) is provided with a plurality of third throttling openings (61) which are distributed in a circular pattern around the axis of the valve seat (2) and are staggered from the second throttling openings (51); and the medium flows through the third throttling openings (61), the second throttling openings (51) and the first throttling openings (41) in sequence, so that the medium undergoes multiple changes in direction and speed.
3. A regulating valve with throttling function according to claim 1 or 2, characterized in that: The inner diameters of the first throttling ring (4), the second throttling ring (5) and the third throttling ring (6) increase sequentially.
4. A regulating valve with throttling function according to claim 1 or 2, characterized in that: The thicknesses of the first throttling ring (4), the second throttling ring (5) and the third throttling ring (6) increase sequentially.