Flange type temperature control valve integrated with safety valve and engineering machinery

Abstract

This invention discloses a flanged temperature control valve with an integrated safety valve and its application in engineering machinery, relating to the field of heat dissipation technology for engineering machinery. It includes a valve block with a temperature control valve chamber inside. A spring is located on one side of the temperature control valve chamber, connected to one end of a valve core. The other end of the valve core is connected to a temperature sensing element, with a push rod at the end of the temperature sensing element furthest from the valve core. The temperature control valve chamber has P-ports and A-ports on both sides, allowing switching between connection and disconnection of P-ports and A-ports via valve core movement. P-ports and A-ports are coaxial and parallel to four flange mounting holes, with the temperature control valve chamber located along the length of the flange mounting holes. An upper cavity connects to a safety valve chamber, and a T-port return oil chamber connects to the lower cavity. A safety valve is inserted into the safety valve chamber. This invention enables automatic control of hydraulic oil temperature. Using a flanged connection, it can be easily integrated into the oil port of a circulating pump or radiator, achieving rapid heating of hydraulic oil in extremely cold conditions and reducing energy consumption.

Description

Technical Field

[0001] This invention relates to a flange-type temperature control valve with integrated safety valve and engineering machinery, belonging to the field of heat dissipation technology for engineering machinery. Background Technology

[0002] Forestry machinery operating in extremely cold environments requires thermostatic valves to automatically control the flow of hydraulic oil to the radiator, enabling rapid heating of the hydraulic oil and subsequent control of the back pressure in the circulating oil circuit. However, traditional forestry machinery often uses split-type thermostatic valves, which need to be fixed to the frame before connecting the relevant pipelines. The safety valves are external tubular check valves, resulting in complex pipeline connections. Combined logging machines, due to space constraints, do not have thermostatic valves installed, leading to slow hydraulic oil temperature rise in extremely cold environments and significant waste.

[0003] In existing technologies, such as CN119933841B, a thermostat, a cooling system, and a vehicle are disclosed. This mainly solves the problems of existing thermostats having limited functionality and low integration, only able to control the opening and closing of the small and large oil circulation loops. Furthermore, when the large circulation loop is open, the high-temperature oil causes significant thermal and pressure shocks to the radiator, affecting the reliability of the cooling system. Additionally, it cannot release pressure in a timely manner when the system pressure is too high. However, its problems include complex oil circuits, the need for external installation, and the use of custom-made valve blocks, resulting in poor versatility.

[0004] Publication number RCN223678266U discloses a radiator assembly, a lubrication and cooling system, and a wind turbine generator set. CN 223975524 U discloses an integrated valve assembly, a radiator assembly, a lubrication and cooling system, and a wind turbine generator set. Both operate on the same principle. The radiator assembly includes a heat dissipation core and a bypass channel. The bypass channel is connected in parallel with the heat dissipation channel within the heat dissipation core. The integrated valve assembly is located at the inlet of the bypass channel. The integrated valve assembly includes an integrated temperature control valve assembly and a pressure valve assembly. The inner cavity of the temperature control valve assembly is connected to the inner cavity of the pressure valve assembly. The temperature control valve controls the direction of the radiator's oil circuit. In both patents, the pressure valve is integrated onto the radiator, and the temperature control valve is mounted on the pressure valve. Therefore, a custom-made radiator is required, resulting in a complex structure and high cost.

[0005] Therefore, there is an urgent need for a temperature control valve that can automatically control the hydraulic oil temperature of forestry machinery in extremely cold environments. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a flange-type temperature control valve with integrated safety valve and engineering machinery, which can automatically control the hydraulic oil temperature, achieve rapid heating of hydraulic oil in extremely cold conditions, and reduce energy consumption.

[0007] To achieve the above objectives, the present invention is implemented using the following technical solution: On one hand, the present invention provides a flanged temperature control valve with an integrated safety valve, including a valve block, a temperature control valve chamber inside the valve block, a spring on one side of the temperature control valve chamber, the spring being connected to one end of a valve core, the other end of the valve core being connected to a temperature sensing element, a push rod being provided at the end of the temperature sensing element away from the valve core, the temperature sensing element being able to expand or contract according to changes in hydraulic oil temperature to achieve switching of push rod extension, valve core movement, or push rod retraction, valve core reset; the temperature control valve chamber has a P port and an A port on both sides respectively, and the movement of the valve core can achieve switching of connection and blockage between the P port and the A port; The temperature control valve cavity is provided with an upper cavity and a lower cavity on the side near the P port. The upper cavity is connected to a safety valve cavity, which is connected to the oil return cavity at the T port. A safety valve is inserted into the safety valve cavity.

[0008] Furthermore, the upper cavity and the lower cavity are interconnected, and the connection point is connected to port P. The upper cavity is connected to the oil inlet of the safety valve cavity through the pressure chamber.

[0009] Furthermore, both the upper and lower cavities adopt an arc-shaped channel.

[0010] Furthermore, the valve core is provided with a throttling orifice, which is used to guide part of the hydraulic oil to the T-port return oil chamber, so that the hydraulic oil is always in contact with the temperature sensing element.

[0011] Furthermore, an end cap is connected to the side of the temperature control valve chamber away from the spring via a retaining ring. The end cap contacts the push rod to limit the axial position of the push rod.

[0012] Furthermore, a sealing ring is provided around the outer perimeter of the end cap, which is used to improve the sealing performance of the contact surface between the end cap and the valve block.

[0013] Furthermore, the T-port oil return chamber is perpendicular to the temperature control valve chamber and also perpendicular to the P-port. The P-port and A-port are coaxial, and the A-port is provided with a flange. The flange has threaded holes at all four azimuth angles, and the threaded holes are equipped with fastening bolts.

[0014] Furthermore, the temperature sensing element and the push rod are an integral structure.

[0015] On the other hand, the present invention also provides an engineering machine that includes a flanged temperature control valve with an integrated safety valve as described in any of the preceding claims; It also includes a circulating pump, a flanged temperature control valve with an integrated safety valve is installed on the circulating pump, and the P port is connected to the oil outlet of the circulating pump, the A port is connected to the oil inlet of the radiator, and the oil outlet and T port return oil chamber of the radiator are connected to the hydraulic oil tank.

[0016] Furthermore, port A is connected to the radiator inlet via a flange.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The flange-type temperature control valve of the integrated safety valve of this invention can realize automatic control of hydraulic oil temperature, enabling forestry engineering machinery to achieve rapid heating of hydraulic oil under extremely cold conditions, reducing energy consumption. It is also equipped with a safety valve to facilitate the release of hydraulic oil pressure to the hydraulic oil tank when the hydraulic oil pressure rises, effectively ensuring the safety of the hydraulic oil circuit.

[0018] The flange-type temperature control valve of the integrated safety valve of the present invention can be standardized and serialized, and can be conveniently installed at the oil outlet of the circulating pump or the oil inlet of the radiator. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the hydraulic flow direction of a flange-type temperature control valve with an integrated safety valve in a low-temperature state, according to one embodiment of the present invention. Figure 2 This is a schematic diagram of the hydraulic flow direction of a flange-type temperature control valve with an integrated safety valve in a high-temperature state, according to one embodiment of the present invention. Figure 3 This is a schematic diagram of the operation of a flange-type temperature control valve with an integrated safety valve in one embodiment of the present invention; Figure 4 This is a cross-sectional view of the valve block in a flanged temperature control valve with an integrated safety valve, according to one embodiment of the present invention. Figure 5 This is a schematic diagram of the installation structure of a flange-type temperature control valve with an integrated safety valve at the outlet of a circulating pump in one embodiment of the present invention. Figure 6 This is a schematic diagram of the installation structure of a flange-type temperature control valve with an integrated safety valve at the radiator inlet in one embodiment of the present invention. In the diagram: 1-Retaining ring, 2-End cap, 3-Sealing ring, 4-Valve block, 5-Safety valve, 6-Spring, 7-Valve core, 8-Temperature sensing element, 9-Push rod, 10-Throttle orifice, 11-Upper cavity, 12-Lower cavity, 13-Pressure chamber, 14-Temperature control valve cavity, 15-Safety valve cavity, 16-T-port return oil cavity, 17-A-port, 18-P-port, 19-Circulating pump, 20-Flange, 21-Radiator. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention. Example 1

[0021] This invention provides a flanged temperature control valve with an integrated safety valve, including a valve block 4, the structure of which is as follows: Figure 4As shown, a temperature control valve chamber 14 is provided inside the valve block 4, and a safety valve chamber 15 is provided on the temperature control valve chamber 14. A safety valve 5 is installed in the safety valve chamber 15. In this embodiment, the safety valve 5 is a cartridge safety valve.

[0022] Combination Figure 1 and Figure 2 Within the temperature control valve chamber 14, located below the safety valve chamber 15, a spring 6, a valve core 7, and a temperature sensing element 8 are sequentially arranged from one side to the other, all interconnected. A push rod 9 is located at the end of the temperature sensing element 8 furthest from the valve core 7. In this embodiment, the push rod 9 and the temperature sensing element 8 are an integral structure. When the hydraulic oil temperature changes, the material of the temperature sensing element 8 expands or contracts. Specifically, as the hydraulic oil temperature rises, the internal temperature-sensing material of the temperature sensing element 8 expands due to heat, causing the push rod 9 to extend outward, pushing the valve core 7 to compress the spring 6, thus moving the valve core 7. As the hydraulic oil temperature decreases, the temperature-sensing material contracts, and the valve core 7, under the action of the spring force, pushes the push rod back, resetting the valve core 7.

[0023] To achieve axial positioning of the push rod 9, this embodiment provides an end cap 2 on the side of the temperature control valve cavity 14 near the push rod 9. The end cap 2 is installed inside the temperature control valve cavity 14 via a retaining ring 1, and the push rod 9 contacts the end cap 2. To ensure the sealing between the end cap 2 and the valve block 4, a sealing ring 3 is provided around the outer periphery of the end cap 2.

[0024] The temperature control valve chamber 14 has a P port 18 and an A port 17 on both sides. The P port 18 and the A port 17 adopt a through-shaft design, and the temperature control valve chamber 14 is located below the spring 6 and connected to the T port oil return chamber 16. In this embodiment, the T port oil return chamber 16 is perpendicular to the temperature control valve chamber 14 and perpendicular to the P port 18.

[0025] An upper cavity 11 and a lower cavity 12 are provided on the side of the temperature control valve cavity 14 near port P 18. The upper cavity 11 and the lower cavity 12 are interconnected and connected to port P 18 at the connection point. The upper cavity 11 is connected to the oil inlet of the safety valve cavity 15 through the pressure cavity 13, and the safety valve cavity 15 is connected to the return oil cavity 16 at port T. In this embodiment, both the upper cavity 11 and the lower cavity 12 adopt an arc-shaped channel.

[0026] To ensure that the temperature sensing element 8 can better sense the hydraulic oil temperature under high temperature conditions, a throttling orifice 10 is provided on the valve core 7. The throttling orifice 10 allows a small amount of hydraulic oil to flow through the throttling orifice 10 to the T-port return oil chamber 16, so that the hydraulic oil is always in contact with the temperature sensing element 8. Example 2

[0027] This embodiment also provides an engineering machinery, which includes a flange-type temperature control valve with an integrated safety valve as described in Embodiment 1.

[0028] Combination Figure 5 and Figure 6The engineering machinery also includes a circulating pump 19, a flanged temperature control valve with an integrated safety valve is installed on the circulating pump 19, and the P port 18 is connected to the oil outlet of the circulating pump, and the A port 17 is connected to the oil inlet of the radiator through a flange. The flange has threaded holes at all four azimuth angles, and the threaded holes are equipped with fastening bolts. Fastening can be achieved by the cooperation of the fastening bolts and the threaded holes. The oil outlet and T port return oil chamber 16 of the radiator are connected to the hydraulic oil tank.

[0029] The working principle of flanged temperature control valves with integrated safety valves in engineering machinery includes: Combination Figure 1 The blue arrow indicates the direction of hydraulic oil flow. When the hydraulic oil is at a low temperature, P port 18 and A port 17 are blocked. The hydraulic oil of the circulating pump flows through P port 18, upper chamber 11, lower chamber 12, and valve core 7 to T port return chamber 16 and directly back to the hydraulic oil tank.

[0030] Combination Figure 2 The red arrow indicates the hydraulic oil flow direction. When the hydraulic oil is at a high temperature, the temperature-sensing material inside the temperature-sensing element 8 expands, causing the push rod 9 to gradually extend until it reaches the preset lift, thus moving the valve core 7. At this time, the spring 6 is pushed by the valve core 7 and is in a compressed state. The valve core 7 connects port P 18 and port A 17, allowing the hydraulic oil to flow through port P 18 and port A 17 to the radiator's inlet. Meanwhile, a small amount of hydraulic oil flows through the throttling orifice 10 to the return oil chamber 16 at port T, ensuring that the hydraulic oil remains in contact with the temperature-sensing element 8 and improving the accuracy of temperature sensing.

[0031] When the hydraulic oil changes from a high temperature state to a low temperature state, the temperature sensing material in the temperature sensing element 8 gradually contracts. At this time, the rebound force of the spring 6 pushes the push rod 9 to gradually retract, causing the valve core 7 to return to its original position.

[0032] Combination Figure 3 When the hydraulic oil pressure is high, the orange arrow indicates the direction of hydraulic oil flow. The high-pressure hydraulic oil flows through the upper cavity 11. At this time, the pressure chamber is subjected to hydraulic pressure, which opens the safety valve 5, so that the high-pressure hydraulic oil flows through the pressure chamber 13 and the safety valve 5 to the T-port return oil chamber 16.

[0033] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A flanged temperature control valve with an integrated safety valve, characterized in that, The device includes a valve block, inside which is a temperature-controlled valve chamber. A spring is located on one side of the temperature-controlled valve chamber, and the spring is connected to one end of a valve core. The other end of the valve core is connected to a temperature-sensing element. A push rod is located at the end of the temperature-sensing element away from the valve core. The temperature-sensing element can expand or contract according to changes in the hydraulic oil temperature to switch between push rod extension, valve core movement, or push rod retraction and valve core reset. The temperature-controlled valve chamber has a P port and an A port on each side, and the movement of the valve core can switch between connecting and blocking the P port and the A port. The temperature control valve cavity is provided with an upper cavity and a lower cavity on the side near the P port. The upper cavity is connected to a safety valve cavity, which is connected to the oil return cavity at the T port. A safety valve is inserted into the safety valve cavity.

2. The flanged temperature control valve with integrated safety valve according to claim 1, characterized in that, The upper cavity and the lower cavity are interconnected, and the connection point is connected to port P. The upper cavity is connected to the oil inlet of the safety valve cavity through the pressure chamber.

3. The flanged temperature control valve with integrated safety valve according to claim 2, characterized in that, Both the upper and lower cavities are constructed using arc-shaped channels.

4. The flanged temperature control valve with integrated safety valve according to claim 1, characterized in that, The valve core is provided with a throttling orifice, which is used to guide part of the hydraulic oil to the T-port return oil chamber, so that the hydraulic oil is always in contact with the temperature sensing element.

5. The flanged temperature control valve with integrated safety valve according to claim 1, characterized in that, The side of the temperature control valve chamber away from the spring is connected to an end cap via a retaining ring. The end cap contacts the push rod to limit the axial position of the push rod.

6. The flanged temperature control valve with integrated safety valve according to claim 5, characterized in that, A sealing ring is provided around the outer perimeter of the end cap, which is used to improve the sealing performance of the contact surface between the end cap and the valve block.

7. The flanged temperature control valve with integrated safety valve according to claim 1, characterized in that, The oil return chamber at port T is perpendicular to the temperature control valve chamber and to port P. Port P and port A are coaxial, and port A is provided with a flange. The flange has threaded holes at all four azimuth angles, and the threaded holes are equipped with fastening bolts.

8. The flanged temperature control valve with integrated safety valve according to claim 1, characterized in that, The temperature sensing element and the push rod are an integral structure.

9. An engineering machinery, characterized in that, It includes a flanged temperature control valve with an integrated safety valve as described in any one of claims 1 to 8; It also includes a circulating pump, a flanged temperature control valve with an integrated safety valve is installed on the circulating pump, and the P port is connected to the oil outlet of the circulating pump, the A port is connected to the oil inlet of the radiator, and the oil outlet and T port return oil chamber of the radiator are connected to the hydraulic oil tank.

10. The engineering machinery according to claim 9, characterized in that, Port A is connected to the radiator inlet via a flange.

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