Explosion-proof hydraulic hand device

Abstract

The utility model discloses a kind of explosion-proof hydraulic manual devices, including hand pump assembly, oil tank assembly, temperature regulating component, explosion-proof box and shell, the hand pump assembly and explosion-proof box are arranged in shell, the explosion-proof box includes explosion-proof cover and explosion-proof bottom plate, the oil tank assembly is fixed on explosion-proof bottom plate, and it is arranged in explosion-proof cover, it is fixed between explosion-proof bottom plate and explosion-proof cover;The temperature regulating component includes several terminals, several temperature switches, heating band and thermosensitive element, the terminal, heating band and thermosensitive element are all arranged on explosion-proof bottom plate, the thermosensitive element is electrically connected with each temperature switch, each the temperature switch is electrically connected with terminal, the terminal is electrically connected with heating band.The utility model has the advantages that the hydraulic manual device still has good working performance under low temperature environment, and the hydraulic manual device also has good explosion-proof effect.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic device technology, and in particular to an explosion-proof hydraulic manual device. Background Technology

[0002] Hydraulic hand devices are portable manual pump products. As a hydraulic power source, they are small in size and light in weight. They are designed for emergency rescue and explosion-hazardous locations and are suitable for disaster relief operations such as traffic accidents and earthquakes.

[0003] However, in certain specialized industrial environments, such as those in the petroleum, chemical, and coal mining industries, flammable and explosive gases or dusts are present. These environments may also involve low-temperature operating conditions. Traditional hydraulic manual devices may experience performance degradation and seal failure in low-temperature environments, and they also suffer from poor explosion-proof performance, necessitating improvements. Utility Model Content

[0004] The purpose of this invention is to provide a hydraulic manual device that still has good working performance in low-temperature environments and has good explosion-proof effect.

[0005] This utility model proposes an explosion-proof hydraulic manual device, including a hand-cranked pump assembly, an oil tank assembly, a temperature control assembly, an explosion-proof box, and a housing. The hand-cranked pump assembly and the explosion-proof box are disposed within the housing. The explosion-proof box includes an explosion-proof outer cover and an explosion-proof base plate. The oil tank assembly is fixed on the explosion-proof base plate and disposed within the explosion-proof outer cover. The explosion-proof base plate and the explosion-proof outer cover are fixed together. The temperature control assembly includes several terminals, several temperature switches, a heating band, and a thermistor. The terminals, heating band, and thermistor are all disposed on the explosion-proof base plate. The thermistor is electrically connected to each temperature switch, each temperature switch is electrically connected to a terminal, and the terminal is electrically connected to the heating band.

[0006] Preferably, a base is fixedly disposed on the surface of the explosion-proof base plate, and a miniature guide rail is fixedly disposed on the base, with a plurality of terminals slidably mounted on the miniature guide rail.

[0007] Preferably, the miniature guide rail includes a base frame and a snap-fit ​​plate. The snap-fit ​​plate is located on both sides of the top of the base frame and is in the shape of an inverted "V". A support is fixedly provided at the bottom of the terminal. A snap-fit ​​groove is formed on the inner side wall of the support, and the snap-fit ​​plate is snapped into the snap-fit ​​groove.

[0008] Preferably, the base and the explosion-proof base plate are fixed together by screws.

[0009] Preferably, the surface of the explosion-proof enclosure is provided with an explosion-proof viewing window.

[0010] Preferably, the explosion-proof outer cover is made of LPU material, and the explosion-proof base plate is made of high-density polyethylene material.

[0011] Preferably, the hand-cranked pump assembly includes a hand-cranked pump, a pressure gauge, a manual directional valve, a throttle valve, and several compression fittings. The manual directional valve is located in the fluid passage of the hand-cranked pump. The pressure gauge is connected to the manual directional valve to detect the pressure in the oil circuit. The compression fittings are located at the bottom of the hand-cranked pump and are connected to the throttle valve.

[0012] Preferably, the fuel tank assembly includes a fuel tank, a check valve, an overflow valve, and a control valve block, wherein the check valve and the overflow valve are both disposed on the control valve block; one end of the control valve block is connected to the fuel tank, the other end of the control valve block is connected to a manual directional valve, and the check valve is connected to a throttle valve.

[0013] As can be seen from the above description of this utility model, this utility model has the following beneficial effects: 1. The hydraulic manual device is equipped with a temperature control component, which includes several terminals, several temperature switches, a heating belt, and a thermal element. When the thermal element senses that the ambient temperature is too low, the temperature switch closes to start heating the heating belt, so that the hydraulic manual device can still maintain good working performance in low-temperature environments.

[0014] 2. The oil tank assembly is installed inside an explosion-proof enclosure, which includes an explosion-proof outer cover and an explosion-proof base plate. The oil tank assembly is fixedly installed on the explosion-proof base plate and passes through the explosion-proof outer cover. The explosion-proof base plate and the explosion-proof outer cover are fixed together. The installation of the explosion-proof enclosure enables the hydraulic manual device to have a good explosion-proof effect. Attached Figure Description

[0015] Figure 1 This is an explosion diagram of an explosion-proof hydraulic manual device according to an embodiment; Figure 2 This is a side view of an explosion-proof hydraulic manual device according to an embodiment; Figure 3 This is a schematic diagram of the structure of the hand-cranked pump assembly and the explosion-proof box in the embodiment; Figure 4 This is a schematic diagram of the structure of the heating belt and the thermistor element in the embodiment; Figure 5 This is a schematic diagram of the structure of the first and second temperature switches in the embodiment; Figure 6 This is a schematic diagram of the terminal installation in the embodiment; Figure 7 This is a schematic diagram of the structure of the miniature guide rail in the embodiment; Figure 8 This is a schematic diagram of the support structure in the embodiment; Figure 9 This is an example of an oil tank assembly.

[0016] Reference numerals: 1. Hand-cranked pump assembly; 11. Hand-cranked pump; 12. Pressure gauge; 13. Manual directional valve; 14. Throttle valve; 15. Compression fitting; 2. Oil tank assembly; 21. Oil tank; 22. Check valve; 23. Overflow valve; 24. Control valve block; 3. Temperature control assembly; 31. Terminal; 32. Temperature switch; 321. First temperature switch; 322. Second temperature switch; 33. Heating belt; 34. Thermistor; 4. Explosion-proof box; 41. Explosion-proof outer cover; 42. Explosion-proof base plate; 43. Explosion-proof viewing window glass; 5. Outer shell; 6. Base; 7. Miniature guide rail; 71. Base frame; 72. Insert plate; 8. Support; 81. Insert groove. Detailed Implementation

[0017] To make the technical problem to be solved, the technical solution and the beneficial effects of this utility model clearer and more understandable, the following description is provided in conjunction with the appendix. Figure 1-9 The present invention will be further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0018] Reference Figure 1 , Figure 2 and Figure 3 An explosion-proof hydraulic manual device includes a hand-cranked pump assembly 1, an oil tank assembly 2, a temperature control assembly 3, an explosion-proof enclosure 4, and a housing 5. The hand-cranked pump assembly 1 and the explosion-proof enclosure 4 are housed within the housing 5. The explosion-proof enclosure 4 includes an explosion-proof outer cover 41 and an explosion-proof base plate 42. The oil tank assembly 2 is mounted on the explosion-proof base plate 42 and inserted into the explosion-proof outer cover 41. The explosion-proof outer cover 41 and the explosion-proof base plate 42 are fixed together with screws, allowing for detachable installation. Fixing the explosion-proof outer cover 41 and the explosion-proof base plate 42 with screws not only provides a secure fixation but also facilitates disassembly. The oil tank assembly 2 is housed within the explosion-proof enclosure 4, thus providing explosion protection for the oil tank assembly 2. The explosion-proof enclosure 4 possesses excellent explosion-proof performance, ensuring safe use in flammable and explosive environments and meeting the needs of special operating conditions.

[0019] To facilitate observation of the interior of the explosion-proof enclosure 4, an explosion-proof viewing window 43 is provided on the surface of the explosion-proof outer casing 41. When it is necessary to observe the interior of the explosion-proof enclosure 4, observation can be completed through the explosion-proof viewing window 43. The explosion-proof outer casing 41 is made of LPU material, and the explosion-proof base plate 42 is made of high-density polyethylene material. The explosion-proof outer casing 41, made of LPU material, has excellent explosion-proof performance. The explosion-proof base plate 42, made of high-density polyethylene material, not only has excellent explosion-proof performance but also excellent low-temperature resistance.

[0020] Reference Figure 4 , Figure 5 and Figure 6 The temperature control assembly 3 includes several terminals 31, several temperature switches 32, a heating band 33, and a thermistor 34. The terminals 31, heating band 33, and thermistor 34 are all mounted on the explosion-proof base plate 42. Two temperature switches 32 are provided: a first temperature switch 321 and a second temperature switch 322. Each first temperature switch 321 and each second temperature switch 322 are mounted on the side of the explosion-proof base plate 42 facing away from the explosion-proof outer cover 41. Thermistors 34 are electrically connected to each temperature switch 32, and each temperature switch 32 is electrically connected to the terminals 31. The terminals 31 are electrically connected to the heating band 33.

[0021] Reference Figure 6 , Figure 7 and Figure 8 To accommodate the installation of terminals 31, a base 6 is horizontally fixed to the surface of the explosion-proof base plate 42, and a miniature guide rail 7 is fixedly mounted on the base 6. Each terminal 31 is slidably mounted on the miniature guide rail 7. The miniature guide rail 7 consists of a base frame 71 and a retaining plate 72, with the retaining plate 72 located on both sides of the base frame 71, making the miniature guide rail 7 in an inverted "U" shape. Correspondingly, each terminal 31 has a support 8 at its bottom end, and a retaining groove 81 is formed on the inner sidewall surface of the support 8, allowing the retaining plate 72 of the miniature guide rail 7 to engage within the sliding groove of the support 8. This enables the terminals 31 to be slidably mounted on the miniature guide rail 7. The miniature guide rail 7 not only accommodates the installation of multiple terminals 31 but also makes the installation and removal of the terminals 31 very convenient.

[0022] When the thermal element 34 senses that the temperature inside the explosion-proof enclosure 4 is below -15℃, the first temperature switch 321 closes, and the heating belt 33 starts heating to approximately -5℃, after which the first temperature switch 321 opens. If the first temperature switch 321 malfunctions, the second temperature switch 322 activates. When the thermal element 34 senses that the temperature inside the explosion-proof enclosure 4 is below -20℃, the second temperature switch 322 closes, and the heating belt 33 starts heating to ensure that the oil temperature in the oil tank 21 remains at a usable level. The temperature control assembly 3 is designed to adjust the temperature inside the explosion-proof enclosure 4, allowing the hydraulic manual device to maintain good performance even in low-temperature environments. The multiple temperature switches 32 in the temperature control assembly 3 prevent the device from failing if a single temperature switch 32 malfunctions.

[0023] Reference Figure 3 and Figure 9The hand-cranked pump assembly 1 includes a hand-cranked pump 11, a pressure gauge 12, a manual directional valve 13, a throttle valve 14, and several compression fittings 15. The hand-cranked pump 11 is housed within the housing 5, and the manual directional valve 13 is located at the fluid passage of the hand-cranked pump 11. The pressure gauge 12 is connected to the manual directional valve 13 to detect the pressure in the oil circuit. The compression fittings 15 are located at the bottom of the hand-cranked pump 11 and are connected to the throttle valve 14. The oil tank assembly 2 includes an oil tank 21, a check valve 22, an overflow valve 23, and a control valve block 24, wherein the check valve 22 and the overflow valve 23 are both located on the control valve block 24. The control valve block 24 and the oil tank 21 are fixedly mounted on the explosion-proof base plate 42, with one end of the control valve block 24 connected to the oil tank 21; the other end of the control valve block 24 is connected to the manual directional valve 13, and the check valve 22 is connected to the throttle valve 14.

[0024] When the hydraulic manual device is in operation, firstly, the manual directional valve 13 is rotated to open the oil circuit. Then, the handle of the hand pump 11 is swung. The oil in the tank 21, under pressure difference, flows through the control valve block 24, the explosion-proof base plate 42, and the manual directional valve 13 to the pressure gauge 12. At this time, the pressure gauge 12 can display the current pressure in the oil circuit in real time. Simultaneously, the oil flows through the explosion-proof base plate 42 to the control valve block 24 via two paths from the manual directional valve 13. One oil path flows to the relief valve 23. When the pressure in the oil circuit exceeds the corresponding set value required for use, the relief valve 23 opens to return the oil to the tank 21. The other oil path flows through the check valve 22 and then to the throttle valve 14. After being throttled by the throttle valve 14, it flows out from the compression fitting 15.

[0025] The specific implementation principle of this application embodiment is as follows: During the use of the hydraulic manual device, when the thermal element 34 senses that the temperature inside the explosion-proof box 4 is below -15℃, it automatically triggers the first temperature switch 321 to close. After the heating belt 33 starts heating to about -5℃, the first temperature switch 321 opens. When the first temperature switch 321 malfunctions, the second temperature switch 322 operates. When the thermal element 34 senses that the temperature inside the explosion-proof box 4 is below -20℃, the second temperature switch 322 closes, and the heating belt 33 starts heating to ensure that the oil temperature in the oil tank 21 remains in a usable state. The temperature control component 3 is set up to adjust the temperature inside the explosion-proof box 4, solving the disadvantage that the hydraulic manual device cannot be used in low-temperature environments. The multiple temperature switches 32 in the temperature control component 3 are set up to prevent the device from failing to continue working after a single temperature switch 32 malfunctions.

[0026] When the hydraulic manual device is in operation, firstly, the manual directional valve 13 is rotated to open the oil circuit. Then, the handle of the hand pump 11 is swung. The oil in the tank 21, under pressure difference, flows through the control valve block 24, the explosion-proof base plate 42, and the manual directional valve 13 to the pressure gauge 12. At this time, the pressure gauge 12 can display the current pressure in the oil circuit in real time. Simultaneously, the oil flows through the explosion-proof base plate 42 to the control valve block 24 via two paths from the manual directional valve 13. One oil path flows to the relief valve 23. When the pressure in the oil circuit exceeds the corresponding set value required for use, the relief valve 23 opens to return the oil to the tank 21. The other oil path flows through the check valve 22 and then to the throttle valve 14. After being throttled by the throttle valve 14, it flows out from the compression fitting 15.

[0027] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution to other situations without modification, shall be protected by the present invention.

Claims

1. An explosion-proof hydraulic manual device, characterized in that: The device includes a hand-cranked pump assembly, an oil tank assembly, a temperature control assembly, an explosion-proof enclosure, and a housing. The hand-cranked pump assembly and the explosion-proof enclosure are housed within the housing. The explosion-proof enclosure includes an explosion-proof outer cover and an explosion-proof base plate. The oil tank assembly is fixed to the explosion-proof base plate and housed within the explosion-proof outer cover. The explosion-proof base plate and the explosion-proof outer cover are fixed together. The temperature control assembly includes several terminals, several temperature switches, a heating band, and a thermistor. The terminals, heating band, and thermistor are all mounted on an explosion-proof base plate. The thermistor is electrically connected to each temperature switch, each temperature switch is electrically connected to a terminal, and the terminal is electrically connected to the heating band.

2. The explosion-proof hydraulic manual device according to claim 1, characterized in that: A base is fixedly mounted on the surface of the explosion-proof base plate, and a miniature guide rail is fixedly mounted on the base. Several terminals are slidably mounted on the miniature guide rail.

3. The explosion-proof hydraulic manual device according to claim 2, characterized in that: The miniature guide rail includes a base frame and a snap-fit ​​plate. The snap-fit ​​plate is located on both sides of the top of the base frame and is in the shape of an inverted "V". A support is fixedly provided at the bottom of the terminal. A snap-fit ​​groove is formed on the inner side wall of the support, and the snap-fit ​​plate is snapped into the snap-fit ​​groove.

4. The explosion-proof hydraulic manual device according to claim 2, characterized in that: The base is fixed to the explosion-proof base plate with screws.

5. The explosion-proof hydraulic manual device according to claim 1, characterized in that: The surface of the explosion-proof enclosure is provided with an explosion-proof viewing window.

6. The explosion-proof hydraulic manual device according to claim 5, characterized in that: The explosion-proof outer cover is made of LPU material, and the explosion-proof base plate is made of high-density polyethylene material.

7. The explosion-proof hydraulic manual device according to claim 1, characterized in that: The hand-cranked pump assembly includes a hand-cranked pump, a pressure gauge, a manual directional valve, a throttle valve, and several compression fittings. The manual directional valve is located in the fluid passage of the hand-cranked pump. The pressure gauge is connected to the manual directional valve to detect the pressure in the oil circuit. The compression fittings are located at the bottom of the hand-cranked pump and are connected to the throttle valve.

8. The explosion-proof hydraulic manual device according to claim 7, characterized in that: The oil tank assembly includes an oil tank, a one-way valve, an overflow valve, and a control valve block. The one-way valve and the overflow valve are both mounted on the control valve block. One end of the control valve block is connected to the oil tank, and the other end of the control valve block is connected to a manual directional valve. The one-way valve is connected to a throttle valve.

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