Safety valve device of novel gear pump

Abstract

The utility model provides a safety valve device of a novel gear pump, which comprises a pump body, an inner cover and a cavity formed by sealing the pump body and the inner cover, a meshing gear is arranged in the cavity, a liquid inlet and a liquid outlet are arranged on the pump body, and the meshing gear divides the cavity into a low-pressure area and a high-pressure area. The pump body is provided with a safety valve device used for adjusting and controlling communication of the high-pressure area and the low-pressure area, the pump body is provided with a hole channel used for containing the safety valve device to move, the safety valve device comprises a valve element, a spring and a valve column, the upper portion of the spring is sleeved with the valve column, the lower portion of the spring is sleeved with the valve element, and a gap is formed between the valve column and the valve element. The input end of the backflow hole is communicated with the hole channel and is arranged at the gap between the valve column and the valve element, the output end of the backflow hole is communicated with the liquid inlet end, and therefore the higher pressure of the high-pressure area relative to the lower-pressure area is controlled, a pipeline system is prevented from being damaged, liquid can flow back to the liquid inlet through the backflow hole, the pressure of the high-pressure area and the pressure of the low-pressure area are stable, and the service life of the pipeline system is prolonged. And accidents are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump equipment, and more specifically relates to a safety valve device for a novel gear pump. Background Art

[0002] The rotor pump consists of a stationary pump casing and a rotating rotor. It has no suction valve and discharge valve. The rotor in the pump body contacts the liquid on one side and applies energy directly to the liquid in the form of static pressure. The liquid is discharged by the squeezing action of the rotating rotor. For high-temperature, high-viscosity and highly corrosive media, once the outlet throttling is blocked, the pressure will increase significantly. In severe cases, cavitation will occur and even damage the pump body.

[0003] The existing patent authorization announcement number: CN206144812U discloses a pressure relief device for a rotor pump, including a pressure relief valve and a rotor pump. The pressure relief valve is composed of a valve body, a spring and a push rod. The push rod is provided with a boss. The spring is sleeved on the push rod. One end of the spring is against the boss of the push rod, and the other end of the spring is against the valve body. The pressure relief valve is connected to a clamp. The push rod supports the valve port of the pressure relief valve through the elastic action of the spring to form a normally closed pressure relief valve. The clamp is provided with a O-ring. The clamp is also connected to the outlet pipe, and the outlet pipe is connected to the rotor pump. When the outlet pressure of the rotor pump is too large, the spring will be pushed open and the pressure will be automatically released to achieve the purpose of protecting the rotor pump.

[0004] The existing technology has the following problems: the rotor pump and the pressure relief valve of the pressure relief device of the rotor pump need to be connected by pipelines, which is not very convenient to operate. It is difficult to adjust the pressure in the rotor pump according to actual conditions, and it is easy to damage the pipeline system. At the same time, the prior art does not have a reflux hole or reflux channel. When the pressure is released, the liquid is discharged into the environment, causing pollution and liquid loss. Utility Model Content

[0005] Therefore, to solve the above technical problems, the present utility model proposes a safety valve device for a new type of gear pump, including a pump body 10 and an inner cover 20. A cavity is sealed and formed by the pump body 10 and the inner cover 20. A meshing gear 30 is arranged in the cavity. The pump body 10 is provided with a liquid inlet 40 and a liquid outlet 50. The meshing gear 30 divides the cavity into a low-pressure area and a high-pressure area. The liquid inlet 40 is communicated with the low-pressure area, and the liquid outlet 50 is communicated with the high-pressure area. The pump body 10 is provided with a safety valve device 60 for regulating and controlling the communication between the high-pressure area and the low-pressure area. The pump body 10 is provided with a passage 70 for accommodating the movement of the safety valve device 60. The safety valve device 60 includes a valve core 601, a spring 602, and a valve post 603. The upper part of the spring 602 is sleeved on the valve post 603, and the lower part is sleeved on the valve core 601. There is a gap between the valve post 603 and the valve core 601. A return hole 80 is arranged in the cavity. The input end of the return hole 80 is communicated with the passage 70 and is located at the gap between the valve post 603 and the valve core 601. The output end of the return hole 80 is communicated with the liquid inlet 40 end. The safety valve device 60 is used to control whether the liquid in the high-pressure area is communicated with the return hole 80. When the pressure acting on the surface of the valve core 601 in the high-pressure area is less than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 is located at the input port of the return hole 80, so that the return hole 80 is not communicated with the high-pressure area, and the liquid between the high-pressure area and the low-pressure area does not flow. When the pressure acting on the surface of the valve core 601 in the high-pressure area is greater than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 moves upward, so that the return hole 80 is communicated with the high-pressure area. The return hole 80 is arranged to incline downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet 40 end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area, avoiding damage to the pipeline system. By providing the return hole 80, the liquid can flow back to the liquid inlet 40, making the pressures in the high-pressure area and the low-pressure area stable and avoiding accidents.

[0006] A safety valve device for a new type of gear pump, comprising a pump body 10 and an inner cover 20. A cavity is sealed and formed by the pump body 10 and the inner cover 20. A meshing gear 30 is arranged in the cavity. The pump body 10 is provided with a liquid inlet 40 and a liquid outlet 50. The meshing gear 30 divides the cavity into a low-pressure area and a high-pressure area. The liquid inlet 40 is communicated with the low-pressure area, and the liquid outlet 50 is communicated with the high-pressure area. The pump body 10 is provided with a safety valve device 60 for adjusting and controlling the communication between the high-pressure area and the low-pressure area. The pump body 10 is provided with a hole 70 for accommodating the movement of the safety valve device 60. The safety valve device 60 includes a valve core 601, a spring 602, and a valve column 603. The upper part of the spring 602 is sleeved on the valve column 603, and the lower part is sleeved on the valve core 601. There is a gap between the valve column 603 and the valve core 601. A return hole 80 is arranged in the cavity. The input end of the return hole 80 is communicated with the hole 70 and is located at the gap between the valve column 603 and the valve core 601. The output end of the return hole 80 is communicated with the liquid inlet 40 end. The safety valve device 60 is used to control whether the liquid in the high-pressure area is communicated with the return hole 80. When the pressure acting on the surface of the valve core 601 in the high-pressure area is less than the resultant force of the tightening force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 is placed at the input port of the return hole 80, so that the return hole 80 is not communicated with the high-pressure area, and the liquid between the high-pressure area and the low-pressure area does not flow. When the pressure acting on the surface of the valve core 601 in the high-pressure area is greater than the resultant force of the tightening force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 moves upward, so that the return hole 80 is communicated with the high-pressure area. The return hole 80 is arranged to incline downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet 40 end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area and avoiding damaging the pipeline system.

[0007] Further, the inclination angle of the return hole 80 is 30 degrees - 45 degrees, and the return effect is better. The aperture of the return hole 80 is 4 mm, which can ensure reliable pressure relief and is suitable for large-flow pumps.

[0008] Further, the liquid inlet 40 and the liquid outlet 50 are arranged on the same side of the pump body 10, with a compact structure and convenient installation.

[0009] Further, a joint 90 matching the liquid inlet 40 and the liquid outlet 50 is provided. The joint 90 is an injection-molded embedded joint, and the joint 90 is integrally formed with the pump body 10, without leakage risk.

[0010] Further, the joint 90 is a pagoda joint, which can directly insert a pipe and be fastened with a hoop, and the installation is convenient and fast.

[0011] Further, a valve element through-hole 100 matching the valve element 601 is provided on the inner cover 20. The valve element 601 is snap-connected to the valve element through-hole 100. A first snap table 110 is provided on the upper portion of the valve element 601. The first snap table 110 is used for the spring 602 to abut against the valve element 601. Under the elastic force of the spring 602 and the pressure in the high-pressure area, it controls the snap connection between the valve element 601 and the valve element through-hole 100 and simultaneously plays a limiting role.

[0012] Further, the valve post 603 is connected to the passage 70. A second snap table 120 is provided on the lower portion of the valve post 603. The spring 602 abuts against the valve post 603 to play a limiting role. A gap is left between the valve post 603 and the valve element 601. By adjusting the distance between the valve post 603 and the valve element 601, the compression force of the spring 602 is further adjusted, affecting the downward pressure of the valve element 601, thereby affecting the pressure difference between the high-pressure area and the low-pressure area.

[0013] Further, the safety valve device 60 further includes an O-ring 604, and the bottom end of the valve post 603 is sleeved with the O-ring 604.

[0014] Further, a rotor cover 130 is provided at the bottom of the inner cover 20. The inner cover 20 and the rotor cover 130 form a sealed chamber. The sealed chamber is communicated with the end of the liquid outlet 50 to form the high-pressure area. The end of the liquid inlet 40 is communicated with the passage 70 to form the low-pressure area. At this time, the pressure at the end of the liquid inlet 40, the pressure in the low-pressure area, and the pressure in the high-pressure area are collinear with the axis of the spring 602. When the pressure in the high-pressure area is less than the resultant force of the compression force of the spring 602 and the pressure at the end of the liquid inlet 40, the valve element 601 is affected by the compression force of the spring 602, and the valve element 601 is snap-connected to the valve element through-hole 100. The liquid in the high-pressure area and the low-pressure area does not flow. At this time, the safety valve does not work. When the pressure in the high-pressure area is greater than the resultant force of the compression force of the spring 602 and the pressure at the end of the liquid inlet 40, the valve element 601 is pushed open, and the high-pressure area is communicated with the low-pressure area, and the pressure in the high-pressure area decreases, thereby playing a role in pressure protection.

[0015] Further, a motor assembly 140 is connected to the pump body 10 to provide a power source.

[0016] Advantages of the present utility model: The present utility model provides a safety valve device for a novel gear pump, which includes a pump body 10 and an inner cover 20. A cavity is formed by sealing the pump body 10 and the inner cover 20. A meshing gear 30 is arranged in the cavity. The pump body 10 is provided with a liquid inlet 40 and a liquid outlet 50. The meshing gear 30 divides the cavity into a low-pressure area and a high-pressure area. The liquid inlet 40 is communicated with the low-pressure area, and the liquid outlet 50 is communicated with the high-pressure area. The pump body 10 is provided with a safety valve device 60 for regulating and controlling the communication between the high-pressure area and the low-pressure area. The pump body 10 is provided with a passage 70 for accommodating the movement of the safety valve device 60. The safety valve device 60 includes a valve core 601, a spring 602, and a valve post 603. The upper part of the spring 602 is sleeved on the valve post 603, and the lower part is sleeved on the valve core 601. There is a gap between the valve post 603 and the valve core 601. A return hole 80 is arranged in the cavity. The input end of the return hole 80 is communicated with the passage 70 and is located at the gap between the valve post 603 and the valve core 601. The output end of the return hole 80 is communicated with the liquid inlet 40 end. The safety valve device 60 is used to control whether the liquid in the high-pressure area is communicated with the return hole 80. When the pressure acting on the surface of the valve core 601 in the high-pressure area is less than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 is placed at the input port of the return hole 80, so that the return hole 80 is not communicated with the high-pressure area, and the liquid does not flow between the high-pressure area and the low-pressure area. When the pressure acting on the surface of the valve core 601 in the high-pressure area is greater than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 moves upward, so that the return hole 80 is communicated with the high-pressure area. The return hole 80 is arranged to incline downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet 40 end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area, avoiding damage to the pipeline system. By providing the return hole 80, the liquid can flow back to the liquid inlet 40, making the pressures in the high-pressure area and the low-pressure area stable and avoiding accidents. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of a safety valve device for a novel gear pump of the present utility model.

[0018] Figure 2 It is a cross-sectional view of a safety valve device for a novel gear pump of the present utility model.

[0019] Figure 3 It is a side cross-sectional view of a safety valve device for a novel gear pump of the present utility model.

[0020] Figure 4This is a partial structural schematic diagram of the safety valve device of a new type of gear pump of the present utility model.

[0021] Figure 5 This is a top view sectional view of the safety valve device of a new type of gear pump of the present utility model.

[0022] Main component symbol description:

[0023] Pump body 10, inner cover 20, meshing gears 30, liquid inlet 40, liquid outlet 50, safety valve device 60, valve core 601, spring 602, valve column 603, O-ring 604, pore passage 70, return hole 80, joint 90, valve core through hole 100, first clamping platform 110, second clamping platform 120, rotor cover 130, motor assembly 140.

[0024] The following specific embodiments will further illustrate the present utility model in conjunction with the above-mentioned drawings. Specific Embodiments

[0025] The following embodiments are described to assist in understanding the present application, and the embodiments are not and should not in any way be construed as limiting the protection scope of the present application.

[0026] In the following description, those skilled in the art will recognize that throughout this discussion, components may be described as separate functional units (which may include sub-units), but those skilled in the art will recognize that various components or portions thereof may be divided into separate components or may be integrated together (including being integrated within a single system or component).

[0027] At the same time, the connections between components or systems are not intended to be limited to direct connections. On the contrary, the data between these components may be modified, reformatted, or otherwise changed by intermediate components. Additionally, additional or fewer connections may be used. It should also be noted that the terms "coupled", "connected", or "input" should be understood to include direct connections, indirect connections through one or more intermediate devices, and wireless connections.

[0028] Embodiment 1

[0029] As Figure 1 shown, this is an overall structural schematic diagram of the safety valve device of a new type of gear pump of the present utility model; as Figure 2 shown, this is a sectional view of the safety valve device of a new type of gear pump of the present utility model; as Figure 3 shown, this is a side sectional view of the safety valve device of a new type of gear pump of the present utility model; as Figure 4 shown, this is a partial structural schematic diagram of the safety valve device of a new type of gear pump of the present utility model; as Figure 5 shown, this is a top view sectional view of the safety valve device of a new type of gear pump of the present utility model.

[0030] A safety valve device for a new type of gear pump, comprising a pump body 10 and an inner cover 20. A cavity is sealed and formed by the pump body 10 and the inner cover 20. A meshing gear 30 is arranged in the cavity. The pump body 10 is provided with a liquid inlet 40 and a liquid outlet 50. The meshing gear 30 divides the cavity into a low-pressure area and a high-pressure area. The liquid inlet 40 is communicated with the low-pressure area, and the liquid outlet 50 is communicated with the high-pressure area. The pump body 10 is provided with a safety valve device 60 for regulating and controlling the communication between the high-pressure area and the low-pressure area. The pump body 10 is provided with a passage 70 for accommodating the movement of the safety valve device 60. The safety valve device 60 includes a valve core 601, a spring 602, and a valve column 603. The upper part of the spring 602 sleeves the valve column 603, and the lower part sleeves the valve core 601. There is a gap between the valve column 603 and the valve core 601. A return hole 80 is arranged in the cavity. The input end of the return hole 80 is communicated with the passage 70 and is located at the gap between the valve column 603 and the valve core 601. The output end of the return hole 80 is communicated with the liquid inlet 40 end. The safety valve device 60 is used to control whether the liquid in the high-pressure area is communicated with the return hole 80. When the pressure acting on the surface of the valve core 601 in the high-pressure area is less than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 is placed at the input port of the return hole 80, so that the return hole 80 is not communicated with the high-pressure area, and the liquid does not flow between the high-pressure area and the low-pressure area. When the pressure acting on the surface of the valve core 601 in the high-pressure area is greater than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 moves upward, so that the return hole 80 is communicated with the high-pressure area. The return hole 80 is arranged to incline downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet 40 end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area and avoiding damaging the pipeline system.

[0031] The inclined angle of the return hole 80 is 30 degrees - 45 degrees, and the return effect is better. The aperture of the return hole 80 is 4 mm, which can ensure reliable pressure relief and is suitable for large-flow pumps.

[0032] The liquid inlet 40 and the liquid outlet 50 are arranged on the same side of the pump body 10, with a compact structure and convenient installation.

[0033] A joint 90 is provided, which is matched with the liquid inlet 40 and the liquid outlet 50. The joint 90 is an injection-molded embedded joint, and the joint 90 is integrally formed with the pump body 10, without leakage risk.

[0034] The joint 90 is a flare fitting, which can directly insert a pipe and be fastened with a hose clamp, and the installation is convenient and fast.

[0035] A valve core through hole 100 matching the valve core 601 is provided on the inner cover 20. The valve core 601 is clamped with the valve core through hole 100. A first clamping platform 110 is provided on the upper part of the valve core 601. The first clamping platform 110 is used for the spring 602 to abut against the valve core 601. Under the elastic force of the spring 602 and the pressure in the high-pressure area, the clamping of the valve core 601 and the valve core through hole 100 is controlled, and at the same time, a limiting function is achieved.

[0036] The valve post 603 is connected to the hole passage 70. A second clamping platform 120 is provided at the lower part of the valve post 603. The spring 602 abuts against the valve post 603 to play a limiting role. A gap is left between the valve post 603 and the valve core 601. By adjusting the distance between the valve post 603 and the valve core 601, the compression force of the spring 602 is adjusted, affecting the downward pressure of the valve core 601, so as to affect the pressure difference between the high-pressure area and the low-pressure area.

[0037] The safety valve device 60 further includes an O-ring 604, and the bottom end of the valve post 603 is sleeved with the O-ring 604.

[0038] A rotor cover 130 is provided at the bottom of the inner cover 20. The inner cover 20 and the rotor cover 130 form a sealed chamber. The sealed chamber is communicated with the outlet 50 end to form the high-pressure area. The inlet 40 end is communicated with the hole passage 70 to form the low-pressure area. At this time, the pressure at the inlet 40 end, the pressure in the low-pressure area, and the pressure in the high-pressure area are collinear with the axis of the spring 602. When the pressure in the high-pressure area is less than the resultant force of the compression force of the spring 602 and the pressure at the inlet 40 end, the valve core 601 is affected by the compression force of the spring 602, and the valve core 601 is clamped with the valve core through hole 100. The liquid in the high-pressure area and the low-pressure area does not flow, and at this time the safety valve does not work. When the pressure in the high-pressure area is greater than the resultant force of the compression force of the spring 602 and the pressure at the inlet 40 end, the valve core 601 is pushed open, the high-pressure area is communicated with the low-pressure area, and the pressure in the high-pressure area decreases, thus playing a role in pressure protection.

[0039] The pump body 10 is connected with a motor assembly 140 for providing a power source.

[0040] Advantages of the present utility model: The present utility model provides a safety valve device for a new type of gear pump, including a pump body 10 and an inner cover 20. A cavity is sealed by the pump body 10 and the inner cover 20. A meshing gear 30 is arranged in the cavity. The pump body 10 is provided with a liquid inlet 40 and a liquid outlet 50. The meshing gear 30 divides the cavity into a low-pressure area and a high-pressure area. The liquid inlet 40 is communicated with the low-pressure area, and the liquid outlet 50 is communicated with the high-pressure area. The pump body 10 is provided with a safety valve device 60 for regulating and controlling the communication between the high-pressure area and the low-pressure area. The pump body 10 is provided with a passage 70 for accommodating the movement of the safety valve device 60. The safety valve device 60 includes a valve core 601, a spring 602, and a valve post 603. The upper part of the spring 602 sleeves the valve post 603, and the lower part sleeves the valve core 601. There is a gap between the valve post 603 and the valve core 601. A return hole 80 is arranged in the cavity. The input end of the return hole 80 is communicated with the passage 70 and is located at the gap between the valve post 603 and the valve core 601. The output end of the return hole 80 is communicated with the liquid inlet 40 end. The safety valve device 60 is used to control whether the liquid in the high-pressure area is communicated with the return hole 80. When the pressure acting on the surface of the valve core 601 in the high-pressure area is less than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 is placed at the input port of the return hole 80, so that the return hole 80 is not communicated with the high-pressure area, and the liquid does not flow between the high-pressure area and the low-pressure area. When the pressure acting on the surface of the valve core 601 in the high-pressure area is greater than the resultant force of the pressing force of the compressed spring 602 and the pressure acting on the surface of the valve core 601 in the low-pressure area, the safety valve device 60 moves upward, so that the return hole 80 is communicated with the high-pressure area. The return hole 80 is arranged to incline downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet 40 end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area and avoiding damage to the pipeline system. By providing the return hole 80, the liquid can flow back to the liquid inlet 40, making the pressures in the high-pressure area and the low-pressure area stable and avoiding accidents.

[0041] The above embodiments only represent several implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several deformations and improvements can be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A safety valve device for a new type of gear pump, comprising a pump body (10) and an inner cover (20), a cavity formed by sealing the pump body (10) and the inner cover (20), a meshing gear (30) provided in the cavity, a liquid inlet (40) and a liquid outlet (50) provided on the pump body (10), the meshing gear (30) dividing the cavity into a low-pressure area and a high-pressure area, the liquid inlet (40) being communicated with the low-pressure area, the liquid outlet (50) being communicated with the high-pressure area, characterized in that: The pump body (10) is provided with a safety valve device (60) for regulating and controlling the communication between the high-pressure area and the low-pressure area. The pump body (10) is provided with a passage (70) for accommodating the movement of the safety valve device (60). The safety valve device (60) includes a valve core (601), a spring (602), and a valve column (603). The upper part of the spring (602) is sleeved on the valve column (603), and the lower part is sleeved on the valve core (601). There is a gap between the valve column (603) and the valve core (601). A return hole (80) is provided in the cavity. The input end of the return hole (80) is communicated with the passage (70) and is located at the gap between the valve column (603) and the valve core (601). The output end of the return hole (80) is communicated with the liquid inlet (40). The safety valve device (60) is used to control whether the liquid in the high-pressure area is communicated with the return hole (80). When the pressure acting on the surface of the valve core (601) in the high-pressure area is less than the resultant force of the pressing force of the compressed spring (602) and the pressure acting on the surface of the valve core (601) in the low-pressure area, the safety valve device (60) is located at the input port of the return hole (80), so that the return hole (80) is not communicated with the high-pressure area, and the liquid does not flow between the high-pressure area and the low-pressure area. When the pressure acting on the surface of the valve core (601) in the high-pressure area is greater than the resultant force of the pressing force of the compressed spring (602) and the pressure acting on the surface of the valve core (601) in the low-pressure area, the safety valve device (60) moves upward, so that the return hole (80) is communicated with the high-pressure area. The return hole (80) is inclined downward, which is convenient for returning part of the fluid in the high-pressure area to the liquid inlet (40) end, thereby controlling the magnitude of the pressure difference between the high-pressure area and the low-pressure area and avoiding damaging the pipeline system.

2. The safety valve device of the novel gear pump according to claim 1, characterized in that: The inclination angle of the return hole (80) is 30 degrees - 45 degrees, and the aperture of the return hole (80) is 4 mm, ensuring reliable pressure relief and being suitable for large-flow pumps.

3. The safety valve device of the novel gear pump according to claim 2, characterized in that: The liquid inlet (40) and the liquid outlet (50) are located on the same side of the pump body (10), with a compact structure and convenient installation.

4. The safety valve device of the novel gear pump according to claim 3, characterized in that: A connector (90) matching the liquid inlet (40) and the liquid outlet (50) is provided. The connector (90) is an injection-molded embedded connector, and the connector (90) is integrally formed with the pump body (10), having no leakage risk.

5. The safety valve device of the novel gear pump according to claim 4, characterized in that: The connector (90) is a flare fitting, which can be directly inserted with a pipe and tightened with a hose clamp, with convenient and quick installation.

6. The safety valve device of the novel gear pump according to claim 1, characterized in that: The inner cover (20) is provided with a valve core through hole (100) that matches the valve core (601). The valve core (601) is snap-fitted with the valve core through hole (100). A first clamping platform (110) is provided at the upper part of the valve core (601), and the first clamping platform (110) is used for the spring (602) to abut against the valve core (601). Under the elastic force of the spring (602) and the pressure in the high-pressure area, it controls the snap-fitting of the valve core (601) and the valve core through hole (100), and at the same time plays a limiting role.

7. The safety valve device of the novel gear pump according to claim 6, characterized in that: The valve stem (603) is connected to the pore passage (70). A second clamping platform (120) is provided at the lower part of the valve stem (603). The spring (602) abuts against the valve stem (603) to play a limiting role. A gap is left between the valve stem (603) and the valve core (601). By adjusting the distance between the valve stem (603) and the valve core (601), the compression force of the spring (602) is adjusted, affecting the downward pressure of the valve core (601), so as to affect the pressure difference between the high-pressure area and the low-pressure area.

8. The safety valve device of the novel gear pump according to claim 7, characterized in that: The safety valve device (60) further includes an O-ring (604), and the bottom end of the valve stem (603) is sleeved with the O-ring (604).

9. The safety valve device of the novel gear pump according to claim 8, characterized in that: A rotor cover (130) is provided at the bottom of the inner cover (20). The inner cover (20) and the rotor cover (130) form a sealed chamber, and the sealed chamber is connected to the outlet (50) end to form the high-pressure area. The inlet (40) end is connected to the pore passage (70) to form a low-pressure area. At this time, the pressure at the inlet (40) end, the pressure in the low-pressure area, and the pressure in the high-pressure area are collinear with the axis of the spring (602). When the pressure in the high-pressure area is less than the resultant force of the compression force of the spring (602) and the pressure at the inlet (40) end, the valve core (601) is affected by the compression force of the spring (602), and the valve core (601) is snap-fitted with the valve core through hole (100), and the liquid in the high-pressure area and the low-pressure area does not flow. At this time, the safety valve does not work. When the pressure in the high-pressure area is greater than the resultant force of the compression force of the spring (602) and the pressure at the inlet (40) end, the valve core (601) is pushed open, the high-pressure area and the low-pressure area are connected, and the pressure in the high-pressure area decreases, thus playing a role in pressure protection.

10. The safety valve device of the novel gear pump according to claim 9, characterized in that: The pump body (10) is connected with a motor assembly (140) to provide a power source.

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