One-way adjustable throttle valve
By designing a combined structure for a one-way adjustable throttle valve, the system achieves convenient overall installation, disassembly, and throttle adjustment, solving the problems of existing one-way throttle valves being unable to be disassembled as a whole and having unadjustable throttle function. This improves operational reliability and adaptability, and reduces maintenance costs.
Patent Information
- Application Number
- CN202520007368.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2026-01-09
- Estimated Expiration
- 2035-01-03
AI Technical Summary
Existing one-way throttle valves cannot be disassembled as a whole, making them inconvenient to use. Their throttling function is not adjustable, and they cannot adapt to load changes, resulting in high maintenance costs and poor operational reliability.
A one-way adjustable throttle valve was designed, which adopts a combination structure of valve seat, one-way valve core, spring, throttle valve core, stop block, stud, nut and plug to realize overall installation and disassembly, facilitate maintenance, and adjust the throttle opening by rotating the stud and nut, simplifying the internal structure and improving guidance and working reliability.
It achieves convenient assembly and disassembly of the one-way throttle valve, reduces maintenance costs, improves operational reliability and throttle adjustment flexibility, adapts to different load changes, simplifies the internal structure, and reduces space occupation.
Smart Images
Figure CN223782147U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a one-way throttle valve, and in particular a one-way throttle valve that can be disassembled as a whole and has adjustable throttle. Background Technology
[0002] Existing one-way throttle valves either cannot be disassembled as a whole, making them inconvenient to use, maintain, or replace, or their throttling function cannot be adjusted, making them unable to adapt to situations with changing loads or fully utilize their throttling back pressure function. Utility Model Content
[0003] The present invention aims to provide a one-way adjustable throttle valve, which is adjustable in throttle flow and can be installed and disassembled as a whole, making it convenient to use and with low maintenance costs.
[0004] The main technical solutions of this utility model are as follows:
[0005] A one-way adjustable throttle valve includes a valve seat, a one-way valve core, a spring, a stop block, a stud, a nut, and a plug. The valve seat is a tubular part, and several oil inlet holes are provided on the middle side wall along the length of the valve seat. These oil inlet holes serve as the inlet of the one-way adjustable throttle valve. The parts before and after the oil inlet holes are respectively the front and rear parts of the valve seat. The inner hole of the front part of the valve seat is set as a stepped cylindrical hole with a larger diameter at the front and a smaller diameter at the rear. The rear part of the one-way valve core is slidably connected in the smaller diameter cylindrical hole of the stepped cylindrical hole. The valve core has an outer conical surface at the front, which is larger at the front and smaller at the rear. The inner edge of the stepped surface of the stepped cylindrical hole and the outer conical surface form a one-way valve sealing pair in the form of a reverse cone valve. The front and rear parts of the one-way valve core are separated by an annular groove with the groove facing outwards. The rear part of the one-way valve core has a flow channel that runs through the front and rear, and this flow channel communicates with the annular groove. The spring is set in the inner hole of the valve seat, in front of the one-way valve core. The spring is kept in a compressed state and presses against the one-way valve core. The front port of the valve seat acts as the outlet of a one-way adjustable throttle valve. The check valve core has a hollow structure. The front end of the inner hole of the check valve core opens to the front port of the valve seat. The rear end of the inner hole of the check valve core is set as a conical hole with a smaller front and a larger rear. The rear part of the throttle valve core is slidably connected to the inner hole of the rear part of the valve seat. A seal is provided between the rear part of the throttle valve core and the valve seat. The front part of the throttle valve core is a truncated cone with a smaller front and a larger rear. An annular gap is formed between the outer conical surface of the front end of the truncated cone and the conical hole on the check valve core. The inner hole of the check valve core communicates with the oil inlet through this annular gap. The stop block is threadedly connected to the valve seat and located behind the throttle valve core. The stud is threadedly connected to the core of the stop block and passes through the stop block to abut against the rear end of the one-way valve core. The rear part of the stud is fixed relative to the stop block by screwing the nut. The plug is threadedly connected to the valve seat and abuts against the stop block from the rear. The outer cylindrical surface of the rear part of the valve seat is provided with a cylindrical section, an external thread section and a polygonal prism section with progressively increasing equivalent diameter from front to back. The cylindrical section is provided with an annular first sealing groove and a first sealing ring is provided in the first sealing groove.
[0006] The oil inlet holes are preferably evenly distributed around the axis of the valve seat.
[0007] The front end of the one-way valve core is preferably provided with an annular groove, and the rear end of the spring is embedded in the annular groove.
[0008] The one-way adjustable throttle valve may also include a spring seat, the front end of which abuts against the spring seat. The spring seat is fixed in the inner hole at the front of the valve seat, and a retaining ring installed in the inner hole of the valve seat restricts the forward movement of the spring seat. The spring seat is an annular structure with its axis extending back and forth, and the annular inner hole communicates with the front port of the valve seat.
[0009] A first retaining ring is also provided behind the first sealing ring in the first sealing groove.
[0010] The outer cylindrical surface at the rear of the throttle valve core is provided with an annular second sealing groove, and a second sealing ring and a second retaining ring are respectively provided in the front and rear of the second sealing groove.
[0011] The rear end face of the screw plug has multiple pin holes.
[0012] The inner hole at the rear of the valve seat can be set as a stepped hole with a smaller front and a larger rear. The rear part of the throttle valve core is slidably connected in the small-diameter cylindrical hole of the stepped hole. The stop block and the screw plug are installed in the large-diameter threaded hole of the stepped hole, and the front end face of the stop block rests on the stepped surface of the stepped hole.
[0013] The cone angle of the conical hole on the one-way valve core is preferably greater than the cone angle of the front part of the throttle valve core.
[0014] The beneficial effects of this utility model are:
[0015] The one-way adjustable throttle valve can be installed as a whole on the valve block, with a compact structure, high integration, and convenient disassembly and assembly. When damaged, it can be replaced as a whole, which can effectively reduce maintenance costs.
[0016] The one-way adjustable throttle valve's valve core also functions as the valve seat for the throttle valve section, greatly simplifying the valve's internal structure, reducing space requirements, and improving operational reliability. Because the rear cylindrical surface of the one-way valve core slides into the valve seat's inner bore, a high degree of concentricity is achieved, resulting in good guiding properties. When adjusting the throttle opening, the valve core is less prone to misalignment or jamming, thus ensuring high overall reliability of the one-way adjustable throttle valve. Attached Figure Description
[0017] Figure 1 This is a schematic diagram of the installation state of one embodiment of the unidirectional adjustable throttle valve in the valve block;
[0018] Figure 2 for Figure 1AA section view;
[0019] Figure 3 This is a schematic diagram of a half-section of the valve core of the one-way valve;
[0020] Figure 4 yes Figure 3 The left view.
[0021] Figure label:
[0022] 1-Valve seat; 2-Plug; 3-Nut; 4-Stud; 5-First sealing ring; 6-First retaining ring; 7-Second sealing ring; 8-Second retaining ring; 9-Throttle valve core; 10-Check valve core; 101-Outer conical surface; 102-Annular groove; 103-Flow channel; 11-Spring; 12-Spring seat; 13-Retaining ring; 14-Stop block; 15-Valve block; D3-One-way adjustable throttle valve. Detailed Implementation
[0023] like Figure 1-4 As shown, this utility model discloses a one-way adjustable throttle valve (hereinafter referred to as a one-way throttle valve) D3, including a valve seat 1, a one-way valve core 10, a spring 11, a throttle valve core 9, a stop block 14, a stud 4, a nut 3, and a plug 2. The valve seat is a tubular part, and several oil inlet holes are provided on the middle side wall of the valve seat along its length. These oil inlet holes serve as the inlet K31 of the one-way adjustable throttle valve. The parts before and after the oil inlet holes are respectively the front and rear parts of the valve seat (corresponding to...). Figure 1 , 2 (Lower and upper viewpoints). The inner hole at the front of the valve seat is configured as a stepped cylindrical hole, larger at the front and smaller at the rear. The rear part of the one-way valve core is slidably connected in the small-diameter cylindrical hole of the stepped cylindrical hole. The front part of the one-way valve core has an outer conical surface 101, larger at the front and smaller at the rear. The inner edge of the stepped surface of the stepped cylindrical hole and the outer conical surface form a one-way valve sealing pair in the form of a reverse cone valve. The front and rear parts of the one-way valve core are separated by an annular groove 102 with the groove opening facing outward. The rear part of the one-way valve core has a flow channel 103 that runs through the front and rear, which communicates with the annular groove. The one-way valve part of the one-way adjustable throttle valve has good sealing performance due to the use of a cone valve type. The spring is set in the inner hole of the valve seat, in front of the one-way valve core, and the spring is kept in a compressed state against the one-way valve core. The front port of the valve seat serves as the outlet K32 of the one-way adjustable throttle valve. The components inside the valve seat of the one-way adjustable throttle valve are arranged axially, and the inlet and outlet channels are arranged at right angles, which facilitates combination with other components to form a composite valve.
[0024] The check valve core has a hollow structure. The front end of the inner bore of the check valve core opens to the front port of the valve seat. The rear end of the inner bore of the check valve core is designed as a conical hole, smaller at the front and larger at the rear. The rear part of the throttle valve core is slidably connected to the inner bore of the rear part of the valve seat, and a seal is provided between the rear part of the throttle valve core and the valve seat. The front part of the throttle valve core is a truncated cone, smaller at the front and larger at the rear. Most of the outer conical surface of the truncated cone is radially opposite to the oil inlet. An annular gap, i.e., the throttling orifice, is formed between the outer conical surface of the front end of the truncated cone and the conical hole on the check valve core. The inner bore of the check valve core communicates with the oil inlet through this annular gap. Since the check valve core also serves as the valve seat for the throttle valve, it greatly simplifies the internal structure of the valve, helps to reduce the space occupied by the valve, and improves the operational reliability of the valve. Because the outer cylindrical surface of the rear part of the one-way valve core is slidably connected to the inner hole of the valve seat, it can achieve a high degree of concentricity, thus providing good guidance. When adjusting the opening of the throttle orifice, the valve core of the throttle valve is not prone to deflection or jamming.
[0025] The stop block is threaded into the valve seat and located behind the throttle valve core. The stud is threaded into the core of the stop block and passes through the stop block, abutting against the rear end of the one-way valve core to limit the backward movement of the throttle valve core. The rear part of the stud is fixed relative to the stop block by screwing on the nut. The plug is threaded into the valve seat and abuts against the stop block from the rear to prevent the stop block from moving backward. Turning the stud forward pushes the throttle valve core forward, which can close the throttle orifice. When it is necessary to increase the throttle orifice, the stud is turned backward, leaving a gap between the throttle valve core and the stud, allowing the outlet of the one-way adjustable throttle valve to be connected to pressurized oil. The pressurized oil flows through the inner hole of the one-way valve core and acts on the throttle valve core, pushing the throttle valve core backward until it is against the front end face of the stud, forming and maintaining the adjusted throttle orifice. After the throttle opening is adjusted, the stud is locked by tightening the nut, thereby fixing the front and rear positions of the throttle valve core and thus fixing the size of the throttle opening. The stud, nut, and stop that make up the throttle opening adjustment mechanism are all located inside the valve seat and protected by a screw plug on the outside, which can effectively prevent them from being crushed or collided by coal blocks. They are easy to maintain and can be well adapted to the working environment of coal mines.
[0026] The rear outer cylindrical surface of the valve seat is provided with a cylindrical section, an external thread section, and a polygonal prism section with progressively increasing equivalent diameters from front to back. The cylindrical section has an annular first sealing groove, and a first sealing ring 7 is provided in the first sealing groove. When this one-way throttle valve is required in a certain oil circuit, the one-way throttle valve can be directly installed as a whole into the valve block 15 of the oil circuit. During installation, the valve seat is installed in the one-way adjustable throttle valve socket on the valve block. The valve seat cooperates with and seals the valve block through the cylindrical section and its sealing structure. The valve seat is axially positioned by the stepped surface between the polygonal prism section and the external thread section against one end face of the valve block. The valve seat is fixed in the valve block by the external thread section. All other parts of the one-way adjustable throttle valve are located in the valve seat. In the installed state, only the valve seat and the valve block are in contact. Only the cylindrical section and the stepped surface between the polygonal section and the external thread section on the valve seat have high machining accuracy requirements. Therefore, the installation reference is simple to machine and the accuracy is easy to ensure. Once the one-way adjustable throttle valve is damaged, the whole thing can be replaced. Disassembly and assembly are very convenient.
[0027] The one-way adjustable throttle valve has two working states. One is the one-way conduction state, where the medium enters the valve seat through the inlet K31, overcoming the spring force to push the one-way valve core forward, causing the one-way valve core to move away from the throttle valve core, which is equivalent to the one-way valve opening. The medium flows through the inner hole of the one-way valve core and flows out through the outlet K32. After the inlet is depressurized, the spring pushes the one-way valve core to reset. The other is the reverse throttle state, where the medium enters the valve seat through the outlet K32, flows out through the inner hole of the one-way valve core, the annular gap between the throttle valve core and the one-way valve core, and the oil inlet. The presence of the annular gap generates a certain damping, which can limit the flow rate of the medium.
[0028] The one-way adjustable throttle valve of this utility model can be further optimized in one or more of the following aspects:
[0029] 1. The inlet and outlet ports of the one-way valve section of the aforementioned one-way adjustable throttle valve are arranged at right angles, with the outlet located at the front port of the tubular valve seat. By setting a valve seat of sufficient diameter and a sufficient opening height for the one-way valve core, this one-way valve section can achieve a large flow rate to adapt to high-flow-rate applications. The flow channel at the rear of the one-way valve core is preferably configured as multiple fan-shaped cross-section channels to maximize the flow cross-sectional area and reduce flow resistance, enabling the one-way valve section to be suitable for more applications and larger flow rates.
[0030] Furthermore, the fan-shaped cross-section of the channel can be configured as a radially externally open structure, and multiple channels are evenly distributed around the circumference, so that while the one-way valve part can adapt to high flow rate applications, the rear part of the one-way valve core still maintains a sliding connection with the valve seat and balanced guidance.
[0031] 2. The oil inlet holes can be evenly distributed around the axis of the valve seat.
[0032] 3. The front end of the one-way valve core may be provided with an annular groove, and the rear end of the spring is embedded in the annular groove, which saves space and makes the spring installation reliable.
[0033] Furthermore, the front end of the one-way valve core can be configured as a protruding tube structure, with the spring sleeved on the tube to prevent unnecessary lateral displacement or deformation of the spring and improve the working reliability of the spring.
[0034] 4. The one-way adjustable throttle valve may further include a spring seat 12, the spring seat fitting its outer cylindrical surface into the inner hole at the front of the valve seat, the front end of the spring abutting against the spring seat, and the spring seat being restricted from moving forward by a retaining ring 3 installed in the inner hole of the valve seat. The spring seat is an annular structure with its axis extending front and back, and its outer cylindrical surface has multiple through notches, the annular inner hole and the notches communicating with the front port of the valve seat.
[0035] 5. A first retaining ring may also be provided behind the first sealing ring in the first sealing groove to prevent the first sealing ring from being damaged due to being squeezed into the gap between the valve core and the valve seat of the throttle valve.
[0036] 6. The outer cylindrical surface at the rear of the throttle valve core is provided with an annular second sealing groove. The second sealing groove is provided with a second sealing ring and a second retaining ring at the front and rear respectively. Similarly, the second retaining ring can prevent the second sealing ring from being damaged by being squeezed into the gap between the valve seat and the valve block.
[0037] 7. The rear end face of the screw plug has multiple pin holes, which can be used to install special tools to facilitate the removal of the screw plug.
[0038] 8. The inner hole at the rear of the valve seat is set as a stepped hole with a smaller front and a larger rear. The rear part of the throttle valve core is slidably connected in the small diameter cylindrical hole of the stepped hole. The stop block and the screw plug are installed in the large diameter threaded hole of the stepped hole, and the front end face of the stop block rests on the stepped surface of the stepped hole.
[0039] 9. The cone angle of the conical hole on the one-way valve core is preferably greater than the cone angle of the front part of the throttle valve core. This can increase the opening at the end edge of the throttle outlet, which helps to slow down the fluid flow rate, reduce hydraulic shock, and avoid system vibration, noise, damage to hydraulic components, or valve malfunction that may occur under extreme conditions.
[0040] The use of "before" and "after" in this article is for ease of expression and is not a limitation on absolute location.
Claims
1. A one-way adjustable throttle valve, characterized in that: The valve includes a valve seat, a one-way valve core, a spring, a throttle valve core, a stop block, a stud, a nut, and a plug. The valve seat is a tubular part with several oil inlet holes on its longitudinal sidewall. These inlet holes act as the inlet for the one-way adjustable throttle valve. The parts before and after the oil inlet holes are the front and rear parts of the valve seat, respectively. The inner hole of the front part of the valve seat is a stepped cylindrical hole with a larger diameter at the front and a smaller diameter at the rear. The rear part of the one-way valve core is slidably connected to the smaller diameter cylindrical hole in the stepped cylindrical hole. The front part of the one-way valve core has a larger diameter at the front and a smaller diameter at the rear. The outer conical surface of the rear valve core and the inner edge of the stepped cylindrical hole form a one-way valve sealing pair in the form of a reverse cone valve. The front and rear parts of the one-way valve core are separated by an annular groove with the groove facing outward. The rear part of the one-way valve core has a flow channel that runs through the front and rear, which communicates with the annular groove. The spring is set in the inner hole of the valve seat, in front of the one-way valve core. The spring is kept in a compressed state and presses against the one-way valve core. The front port of the valve seat acts as the outlet of a one-way adjustable throttle valve. The valve core has a hollow structure. The front end of the inner hole of the one-way valve core opens to the front port of the valve seat. The rear end of the inner hole of the one-way valve core is set as a conical hole with a smaller front and a larger rear. The rear part of the throttle valve core is slidably connected to the inner hole of the rear part of the valve seat. A seal is provided between the rear part of the throttle valve core and the valve seat. The front part of the throttle valve core is a truncated cone with a smaller front and a larger rear. An annular gap is formed between the outer conical surface of the front end of the truncated cone and the conical hole on the one-way valve core. The inner hole of the one-way valve core communicates with the oil inlet through this annular gap. The stop block is threadedly connected to the valve seat and located behind the throttle valve core. The stud is threadedly connected to the core of the stop block and passes through the stop block to abut against the rear end of the one-way valve core. The rear part of the stud is fixed relative to the stop block by screwing on the nut. The plug is threadedly connected to the valve seat and abuts against the stop block from the rear. The rear outer cylindrical surface of the valve seat is provided with a cylindrical section, an external thread section and a polygonal prism section with progressively increasing equivalent diameter from front to back. The cylindrical section is provided with an annular first sealing groove and a first sealing ring is provided in the first sealing groove.
2. The one-way adjustable throttle valve as described in claim 1, characterized in that: The oil inlet holes are evenly distributed around the axis of the valve seat.
3. The one-way adjustable throttle valve as described in claim 1, characterized in that: The front end of the one-way valve core is provided with an annular groove, and the rear end of the spring is embedded in the annular groove.
4. The one-way adjustable throttle valve as described in claim 1, characterized in that: It also includes a spring seat, the front end of the spring abuts against the spring seat, the spring seat is fixed in the inner hole of the front part of the valve seat, and the forward movement of the spring seat is restricted by a retaining ring installed in the inner hole of the valve seat. The spring seat is an annular structure with the axis extending back and forth, and the annular inner hole communicates with the front port of the valve seat.
5. The one-way adjustable throttle valve as described in claim 1, characterized in that: A first retaining ring is also provided behind the first sealing ring in the first sealing groove.
6. The one-way adjustable throttle valve as described in claim 1, characterized in that: The outer cylindrical surface at the rear of the throttle valve core is provided with an annular second sealing groove, and a second sealing ring and a second retaining ring are respectively provided in the front and rear of the second sealing groove.
7. The one-way adjustable throttle valve as described in claim 1, characterized in that: The rear end face of the screw plug has multiple pin holes.
8. The one-way adjustable throttle valve as described in claim 1, characterized in that: The inner hole at the rear of the valve seat is set as a stepped hole with a smaller front and a larger rear. The rear part of the throttle valve core is slidably connected in the small-diameter cylindrical hole of the stepped hole. The stop block and the screw plug are installed in the large-diameter threaded hole of the stepped hole, and the front end face of the stop block rests on the stepped surface of the stepped hole.
9. The one-way adjustable throttle valve as described in claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: The cone angle of the conical hole on the one-way valve core is greater than the cone angle of the front part of the throttle valve core.