Pump body with exhaust valve and pump

Abstract

The utility model belongs to the technical field of pumps, and provides a pump body with an exhaust valve and a pump, the pump body with the exhaust valve comprises a metal pump body and an exhaust valve assembly, and the exhaust valve body is arranged on the metal pump body; the exhaust valve assembly comprises a floating body which is arranged in the exhaust valve body, a sealing ring for sealing a gap between the floating body and the exhaust valve body is arranged between the floating body and the exhaust valve body, and the floating body can lift and float relative to the exhaust valve body; mounting holes are formed in the side walls of the valve element and the floating body, and the central axes of the mounting holes are arranged in the radial direction of the floating body; the valve element is installed in the installation hole, and exhaust channels are formed in the valve element and the floating body. The valve rod and the valve element are coaxially arranged, the valve rod can seal an inlet of the exhaust channel, one end of the spring is connected to the valve element, and the other end of the spring is connected to the valve rod; and the valve body is arranged below the floating body, and the floating body can drive the valve body to synchronously descend so as to open the inlet of the exhaust channel.

Description

Technical Field

[0001] The utility model belongs to the technical field of pumps, and particularly relates to a pump body with an exhaust valve and a pump. Background Art

[0002] Basically, the metal pump bodies of existing water pumps are all formed by casting, and their structural shapes are basically composed of an inlet and outlet, a flow channel structure, and a sensor mounting hole.

[0003] Basically, the existing metal pump body structure is not equipped with an automatic exhaust valve structure, and it is impossible to achieve gas-liquid separation at the inlet when the medium enters the pump body, so as to discharge the gas and reduce the influence of the gas on the pump body. And generally, the conventional metal pump body structure is exhausted through a bleed screw according to the needs of the whole machine.

[0004] To solve the above technical problems, a pump body with an exhaust valve is provided in this technical solution for application on a pump. Content of the Utility Model

[0005] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a pump body with an exhaust valve to achieve gas-liquid separation at the inlet when the medium enters the pump body, so as to discharge the gas and reduce its influence on the pump body.

[0006] Another purpose of the utility model is to provide a pump, which can achieve gas-liquid separation at the inlet of the pump during operation, and reduce the noise during the operation of the pump.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A pump body with an exhaust valve includes a metal pump body and an exhaust valve assembly, and an exhaust valve body is arranged on the metal pump body;

[0009] The exhaust valve assembly includes:

[0010] A floating body is arranged in the exhaust valve body. A sealing ring for sealing the gap between the floating body and the exhaust valve body is arranged between the floating body and the exhaust valve body, and the floating body can lift and float relative to the exhaust valve body;

[0011] A valve core, an installation hole is formed in the side wall of the floating body, and the central axis of the installation hole is arranged along the radial direction of the floating body;

[0012] The valve core is installed in the installation hole, and an exhaust channel is formed in the valve core and the floating body;

[0013] A valve rod and a spring, the valve rod is coaxially arranged with the valve core, the valve rod can seal the inlet of the exhaust channel, one end of the spring is connected to the valve core, and the other end is connected to the valve rod;

[0014] The valve body is arranged below the floating body, and the floating body can drive the valve body to descend synchronously to drive the valve stem to open the inlet of the exhaust passage;

[0015] When the valve body rises, the spring resets to drive the valve stem to seal the inlet of the exhaust passage.

[0016] Preferably, a first helical tooth portion is provided on the valve core, a second helical tooth portion is provided on the valve stem, one end of the spring is connected to the first helical tooth portion, and the other end is connected to the second helical tooth portion.

[0017] Preferably, when the valve body moves downward, one end of the valve stem is pulled downward to incline, the spring is bent and deformed, and the valve stem and the valve core are opened.

[0018] Preferably, the central axis of the exhaust valve assembly is parallel to the central axes of the water inlet and the water outlet of the metal pump body.

[0019] Preferably, the exhaust passage includes a first passage and a second passage, a third passage is formed on the floating body, the first passage is arranged along the axial direction of the mounting hole, the second passage is arranged along the axial direction of the floating body, the first passage is communicated with the second passage and the third passage, and the third passage is arranged along the axial direction of the floating body.

[0020] Preferably, a first threaded portion is provided at the outer end of the valve core, and the first threaded portion is located on one side of the second passage;

[0021] A first seal is provided between the valve core and the floating body, and the first seal is located between the first threaded portion and the second passage;

[0022] And / or a second seal is further provided between the valve core and the mounting hole, the second seal is arranged on the other side of the second passage, a second mounting groove is provided on the valve core, and the second seal is arranged in the second mounting groove;

[0023] The cross-sectional shape of the second seal is the same as that of the first seal, and the cross-sectional area of the second seal is larger than the cross-sectional area of the first seal.

[0024] Preferably, a first mounting groove is provided on the valve core, and the first seal is arranged in the first mounting groove;

[0025] The minimum distance between the first mounting groove and the first threaded portion along the axial direction of the mounting hole is a first preset distance, and the first preset distance ranges from 1 mm to 2 mm.

[0026] Preferably, the minimum distance between the first installation groove and the second channel along the axial direction of the installation hole is a second preset distance, and the range of the second preset distance is 0.6 mm - 2 mm.

[0027] Preferably, a gasket is provided at the end of the valve stem, and the gasket can block the inlet of the exhaust passage.

[0028] A pump includes the pump body with an exhaust valve as described above.

[0029] Compared with the prior art, the present invention has the following beneficial effects: An exhaust valve assembly is provided on the metal pump body of the present invention. When the pump is working, the exhaust valve assembly can automatically open for exhaust and close to prevent liquid leakage, realizing the automatic gas-liquid separation of the liquid medium before entering the volute chamber, reducing the amount of gas entering the volute chamber, reducing the cavitation phenomenon, and improving the service life of other components.

[0030] The automatic gas-liquid separation of the medium before entering the volute chamber can realize the automatic exhaust of the subsequent entire pump, eliminating the need for subsequent manual exhaust or designing other exhaust structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 is a schematic diagram of the internal structure of the pump in the present invention;

[0032] Figure 2 is a schematic diagram of the structure of the pump body with an exhaust valve in the present invention;

[0033] Figure 3 is a schematic diagram of the internal structure of the pump body with an exhaust valve in the present invention;

[0034] Figure 4 is a schematic diagram of the structure of the pump in the present invention;

[0035] Figure 5 is a partial schematic diagram of the pump body with an exhaust valve in the present invention (sealing state);

[0036] Figure 6 is a partial schematic diagram of the pump body with an exhaust valve in the present invention (exhaust state);

[0037] Figure 7 is a cross-sectional view of the pump body with an exhaust valve in the present invention (spring not shown);

[0038] Figure 8 is a schematic diagram of the structure of the valve core in the present invention;

[0039] Figure 9 is a cross-sectional view of the valve core in the present invention;

[0040] Figure 10 Structural schematic diagram of the floating body in the present utility model;

[0041] Figure 11 Cross-sectional view of the floating body in the present utility model;

[0042] Figure 12 Structural schematic diagram of the valve stem in the present utility model;

[0043] Figure 13 Structural schematic diagram of the valve body in the present utility model.

[0044] Among them, 100, air release screw; 1, metal pump body; 2, exhaust valve assembly; 21, floating body; 210, third channel; 211, floating body main body; 212, annular boss; 22, valve core; 220, mounting hole; 221, first channel; 222, second channel; 223, first spiral tooth part; 224, sealing part; 225, mounting part; 226, floating body main body; 228, thread part; 229, connection hole; 23, valve stem; 231, second spiral tooth part; 232, gasket; 233, first connection part; 224, second connection part; 24, spring; 25, valve body; 251, pressing connection part; 26, first seal; 27, second seal; 28, first mounting groove; 29, second mounting groove; 30, hexagon socket head mounting hole; 31, hook; 32, circlip; 34, valve cap; 341, frustum part; 343, ventilation hole; 35, sealing ring; 36, exhaust valve body; 5, inlet; 6, volute chamber; 7, pump body inlet; 8, outlet; 10, motor; 11, whole pump unit. Specific embodiments

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Generally, the components of the embodiments of the present utility model described and illustrated herein can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0047] It should be noted that like reference numerals and letters indicate like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0048] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present utility model is customarily placed during use. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0049] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "arranged" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0050] In the present utility model, unless otherwise clearly specified and defined, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0051] The embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present utility model and cannot be construed as a limitation on the present utility model.

[0052] As Figures 1-13As shown in the figure, in this embodiment, a pump body with an exhaust valve is disclosed, which includes a metal pump body 1 and an exhaust valve assembly 2. An exhaust valve body 36 is provided on the metal pump body 1, and the exhaust valve assembly 2 is installed in the exhaust valve body 36.

[0053] Among them, the exhaust valve assembly 2 includes a floating body 21, a valve core 22, a valve rod 23, a spring 24 and a valve body 25. A sealing ring 35 for sealing the gap between the floating body 21 and the exhaust valve body 36 is provided between the floating body 21 and the exhaust valve body 36, and the floating body 21 can lift and float relative to the exhaust valve body 36.

[0054] Specifically, the floating body 21 can descend under the action of its own gravity, and the floating body 21 can rise under the buoyancy of the water in the metal pump body 1. A sealing ring 35 is provided on the outer periphery of the floating body 21, and the sealing ring 35 is located between the floating body 21 and the exhaust valve body 36 to prevent the water in the metal pump body 1 from flowing out through the gap between the floating body 21 and the exhaust valve body 36. Since the liquid in the metal pump body 1, such as water, has a certain pressure, the impact of the liquid causes the valve body to rise, and the liquid will spray out through the gap between the floating body 21 and the metal pump body 1. Therefore, the sealing ring 35 is provided to prevent the liquid from spraying out through the gap between the two. Preferably, the floating body 21 includes a floating body main body 211 and an annular convex platform 212 protruding from the outer peripheral wall of the floating body main body 211, and the sealing ring 36 is provided between the lower part of the annular convex platform 212 and the exhaust valve body 36. Preferably, the above-mentioned sealing ring 36 is an O-shaped rubber sealing ring.

[0055] An installation hole 220 is provided on the side wall of the floating body 21, and the central axis of the installation hole 220 is arranged along the radial direction of the floating body 21. The valve core 22 is installed in the installation hole 220, and an exhaust channel is provided in the valve core 22 and the floating body 21. Optionally, the exhaust channel includes a first channel 221 and a second channel 222. A third channel 210 is provided on the floating body 21. The first channel 221 is arranged along the axial direction of the installation hole 220, the second channel 222 is arranged along the axial direction of the floating body 21, the first channel 221 is communicated with the second channel 222 and the third channel 210, and the third channel 210 is arranged along the axial direction of the floating body 21.

[0056] Specifically, the second channel 222 and the third channel 210 are communicated and are both arranged along the vertical direction. The first channel 221 is arranged along the horizontal direction, and the first channel 221 and the second channel 222 and the third channel 210 are arranged in an L shape.

[0057] The valve rod 23 is coaxially arranged with the valve core 22, and the valve rod 23 can seal the inlet of the exhaust channel. Specifically, the valve rod 23 can seal the port of the first channel 221 described above. One end of the spring 24 is connected to the valve core 22, and the other end is connected to the valve rod 23.

[0058] The valve body 25 is arranged below the floating body 21. The floating body 21 can drive the valve body 25 to descend synchronously to drive the valve stem 23 to open the inlet of the exhaust passage. When the valve body 25 ascends, the spring 24 resets to drive the valve stem 23 to seal the inlet of the exhaust passage. As Figure 13 shown, specifically, a pressing connection part 251 is arranged above the valve body 25. During the descending process, the pressing connection part 251 can contact the valve stem 23 and press the valve stem 23 to descend.

[0059] When there is gas inside the pump, the initial state of the exhaust valve is the open state. The floating body 21 sinks under its own gravity. The floating body 21 presses down to drive the valve body 25 to descend synchronously. During the descending process, the valve body 25 pulls the valve stem 23 to descend. Since the valve stem 23 and the valve core 22 are coaxially connected by the spring 24, during the descending process of the valve stem 23, the end of the valve stem 23 away from the valve core 22 inclines downward, driving the spring 24 to deform. A gap is generated between the valve stem 23 and the valve core 22, and the valve core 22 and the valve stem 23 open. The gas is discharged through the above-mentioned first passage 221, second passage 222, and third passage 210.

[0060] As the gas is discharged, the liquid rises. The floating body 21 rises under the action of buoyancy. After rising to a certain stage, the valve body 25 will also rise simultaneously and disengage from the valve stem 23. Under the action of the spring 24, the valve stem 23 becomes horizontal again (such as the state of the valve stem 23 and the valve core 22 shown in Figure 5 ). The valve core 22 and the valve stem 23 come into contact again. The valve stem 23 blocks the first passage 221 to prevent the liquid from leaking. The exhaust valve assembly 2 is in the closed state.

[0061] In this embodiment, an exhaust valve assembly 2 is arranged on the metal pump body 1. When the pump is working, the exhaust valve assembly 2 can automatically open for exhaust and close to prevent the liquid from leaking, realizing the automatic gas-liquid separation of the liquid medium before entering the volute chamber, reducing the amount of gas entering the volute chamber, reducing the cavitation phenomenon, and improving the service life of other components.

[0062] The automatic gas-liquid separation of the medium before entering the volute chamber can realize the automatic exhaust of the subsequent entire pump, eliminating the need for subsequent frequent manual exhaust or designing other exhaust structures.

[0063] As Figure 1 shown, a bleeding screw 100 in the pump body design of the prior art is still retained on the metal pump body 1. As Figure 3 shown, more than 99.5% of the gas entering the metal pump body 1 from the water inlet 5 is discharged from the pump body through the exhaust valve assembly 2, and less than 0.5% of the gas enters the pump interior through the pump body inlet. Since the amount of this part of the gas is extremely small, it is generally not necessary to open the bleeding screw 100 for exhaust again. If the exhaust valve assembly 2 fails and cannot exhaust normally, the bleeding screw 100 can be used for exhaust to ensure that the pump will not be damaged.Figure 6 The arrow in it indicates a schematic diagram of the path for the gas in the pump body to be discharged.

[0064] Preferably, the central axis of the exhaust valve assembly 2 is parallel to the central axis of the water inlet and the central axis of the water outlet of the metal pump body 1 to ensure that the gas can be discharged from the pump body quickly and in the largest amount.

[0065] Preferably, the valve core 22 is threadedly connected to the mounting hole 220 of the floating body 21. While fixing the valve core 22, it is ensured that the second channel 222 and the third channel 210 on the floating body 21 are vertically aligned along the axial direction of the floating body 21. The threaded connection between the valve core 22 and the floating body 21 facilitates the disassembly and installation of the valve core 22. Specifically, a first threaded portion 228 is provided at the outer end of the valve core 22, and the first threaded portion 228 is located on one side of the second channel 222, such as Figure 5 the left side in it. The valve core 22 is threadedly connected to the internal thread of the mounting hole 220 of the valve body through the first threaded portion 228 to fasten the valve core 22.

[0066] Preferably, a first seal 26 is provided between the valve core 22 and the floating body 21, and the first seal 26 is located between the first threaded portion 228 and the second channel 222. A first mounting groove 28 is provided on the valve core 22, and the first seal 26 is disposed in the first mounting groove 28. Specifically, the minimum distance between the first mounting groove 28 and the first threaded portion 228 along the axial direction of the mounting hole 220 is a first preset distance, and the range of the first preset distance is 1 mm - 2 mm. After the valve core 22 and the mounting hole 220 are tightened, the first seal 26 is in place to seal the gap between the valve core 22 and the mounting hole 220, preventing the first seal 26 from being squeezed by the mounting hole 220 during the screwing process of the valve core 22, which affects the installation, or after installation, the position of the first seal 26 is misaligned. Preferably, a second threaded portion is provided on the mounting hole 220 corresponding to the first threaded portion 228, and the top diameter dimension of the second threaded portion is larger than the diameter dimension of the mounting hole 220 to prevent the first seal 26 from being squeezed and deformed during the screwing process, which affects the sealing effect, and at the same time, it is also convenient for installing the valve core.

[0067] Preferably, the minimum distance between the first mounting groove 28 and the second channel 222 along the axial direction of the mounting hole 220 is a second preset distance, and the range of the second preset distance is 0.6 mm - 2 mm to ensure that the edge distance between the first mounting groove 28 and the second channel 222 has sufficient dimensions, thereby ensuring the structural strength of the second channel 222. At the same time, the first mounting groove 28 is maximally close to the first threaded portion 28, which can ensure that the overall structural size of the valve core 22 is compact and not too large.

[0068] Preferably, the first seal 26 is a rubber sealing ring. Specifically, the rubber sealing ring is an O-ring. The number of the first sealing rings is one, and in other embodiments, it can also be multiple.

[0069] Preferably, an internal hexagonal mounting hole 30 is provided at the outer end of the valve element 22 to facilitate the installation and screwing of the valve element 22.

[0070] Preferably, a second sealing member 27 is further provided between the valve element 22 and the mounting hole 220. The second sealing member 27 is disposed on the other side of the second channel 222. A second mounting groove 29 is provided on the valve element 22, and the second sealing member 27 is disposed in the second mounting groove 29. The cross-sectional shape of the second sealing member 27 is the same as that of the first sealing member 26, and the cross-sectional area of the second sealing member 27 is larger than that of the first sealing member 26. Since the valve element 22 is connected to the second thread portion in the mounting hole 220 through the first thread portion 28, and the valve element 22 is located in the mounting hole 220 with one end close to the valve stem 23 being cantilever-mounted. When the liquid in the pump exerts a force on the valve element 22, causing a relatively large movement amplitude of the valve element 22. Therefore, a second sealing member 27 with a larger size is required between the valve element 22 and the mounting hole 220 to compensate for the movement amplitude of the valve element 22.

[0071] Preferably, along the axial direction of the mounting hole 220, the minimum distance between the second mounting groove 29 and the second channel 222 is a third preset distance, and the dimension range of the third preset distance is 1 mm - 2 mm, which ensures the structural strength of the second mounting groove 29. At the same time, it ensures the overall structure of the valve element 22 is compact and the size will not be too large.

[0072] Preferably, a first helical tooth portion 223 is provided at the end of the valve element 22, and one end of the spring 24 is clamped in the first helical tooth portion 223. The spring 24 is fixed by screwing connection with the first helical tooth portion 223, which enables quick installation of the spring 24 and also prevents the spring 24 from falling off.

[0073] Preferably, a second helical tooth portion 231 is provided on the valve stem 23, and the other end of the spring 24 is clamped in the second helical tooth portion 231. The valve element 22 and the valve stem 23 are elastically connected by the spring 24. Specifically, the spring 24 is spirally screwed into the second helical tooth portion 231 and meshes with the second helical tooth portion 231.

[0074] In this embodiment, the hardness requirement of the spring 24 is that when the valve body 25 moves downward, it can drive the valve stem 23 to descend synchronously, causing the spring 24 to deform. And when the valve body 25 is not in contact with the valve stem 23, the spring 24 does not deform, enabling the valve stem 23 and the valve element 22 to contact, and the valve stem 23 to block the port of the first channel 221.

[0075] Preferably, a gasket 232 is provided at the end of the valve stem 23. The gasket 232 contacts the port of the first channel 221 and is made of an elastic material. The gasket 232 can deform. After being squeezed between the valve stem 23 and the valve core 22, the gasket 232 produces a small deformation to block the port of the first channel 221. Specifically, the material of the gasket 232 is silica gel or rubber. During the process of being squeezed by the valve stem 23 and the valve core 22, the deformation amount of the gasket 232 is small, and after the valve stem 23 and the valve core 22 are separated, the deformation of the gasket 232 is restored.

[0076] Preferably, a blocking portion 224 is provided at the end of the valve core 22 where the first channel 221 is opened. The end face of the blocking portion 224 in contact with the valve stem 23 is an outwardly convex arc surface, so as to facilitate the full contact between the gasket 232 and the blocking portion 224 and block the port of the first channel 221.

[0077] Preferably, the first helical tooth portion 223 on the valve core 22 is connected to the blocking portion 224 through a tapered portion. The ratio range of the diameter of the blocking portion 224 to the root circle diameter of the first helical tooth portion 223 is 1:2 - 2:3. In this embodiment, the ratio of the diameter of the blocking portion 224 to the root circle diameter of the first helical tooth portion 223 is 1:2. After the contact area between the valve core 22 and the blocking portion 224 meets the blocking requirements, the weight of the valve core 22 can also be reduced, thereby reducing the load borne by the spring 24, and further reducing the size and occupied space of the spring 24.

[0078] Preferably, the valve stem 23 includes a first connecting portion 233 and a second connecting portion 234. The ratio range of the diameter of the second connecting portion 234 to the diameter of the first connecting portion 233 is 1:3 - 2:3, and the first helical tooth portion 223 is provided on the first connecting portion 233. Setting the diameter of the second connecting portion 234 to be smaller than the diameter of the first connecting portion 233 can reduce the overall weight of the valve stem 23, reduce the force on the spring 24, and further reduce the structural size of the spring 24. And the diameter of the first connecting portion 233 is larger to ensure the structural strength of the first helical tooth portion 231 thereon, and further ensure the connection strength between the spring 24 and it, so as to ensure that the valve stem 23 can maintain a horizontal state when not affected by the force of the valve body 25.

[0079] Preferably, the pump body with an exhaust valve further includes a hook 31 connected to the floating body 21. At least part of the hook 31 is provided below the valve body 25. The hook 31 can limit the extreme position of the downward movement of the valve body 25 and prevent the valve body 25 from being unable to reset.

[0080] Preferably, an installation portion 225 is provided on the inner wall of the floating body 21. The installation portion 225 is located above the hook 31. The hook 31 is a first U-shaped member. The first U-shaped member is located outside the valve body 25, and both ends of the valve body 25 are respectively connected to the installation portion 225.

[0081] The installation part 225 is fixedly connected to the first U-shaped part. The first U-shaped part is located on the outer periphery of the valve body 25. When the valve body 25 descends, the first U-shaped part can limit the extreme position of the downward movement of the valve body 25 and prevent the valve body 25 from moving downward excessively. Since the free end of the valve body 25 inclines downward Figure 6 At the right end of the valve body 25 in [description], the spring 24 is deformed. If the valve body 25 continues to move downward, it will disengage from the valve stem 23 and the valve body 25 cannot be reset.

[0082] Preferably, a connection hole 229 is provided on the installation part 225. A protrusion is provided at the installation end of the hook 31. The protrusion is inserted into the connection hole 229 and is in interference fit with the connection hole 229, enabling the quick installation of the hook 31 to the installation hole 220. Specifically, the interference amount between the protrusion and the installation hole 220 is small. Through the interference amount after the assembly of the protrusion and the installation hole 220, it is ensured that the hook 31 will not disengage from the installation hole 220, and it can withstand a certain downward acting force generated on the hook 31 when the valve body 25 descends. It can also ensure that the first U-shaped part can be disassembled from the installation hole 220, facilitating the replacement and repair of the internal structure of the pump body. The central axis of the connection hole 229 in this embodiment is arranged in the vertical direction, and the protrusion is arranged in a circumferential ring shape.

[0083] Preferably, the pump body with an exhaust valve further includes an elastic retaining ring 32. A jack is provided on the exhaust valve body 36. The elastic retaining ring 32 can be inserted into the jack. The elastic retaining ring 32 can press against the floating body 21. The elastic retaining ring 32 is used to limit the upper extreme position of the upward movement of the floating body 21 and prevent the gas pressure in the pump body from being too high, so that the gas will push the floating body 21 out of the exhaust valve body 36, affecting the use.

[0084] Preferably, the elastic retaining ring 32 is a second U-shaped part. Jacks are provided on both sides of the floating body 21 on the exhaust valve body 36 in a symmetric manner. The two ends of the second U-shaped part are respectively inserted into the above-mentioned jacks, and the floating body 21 can press against the second U-shaped part.

[0085] In this embodiment, the axis of the jack is arranged in the horizontal direction, and the first U-shaped part and the second U-shaped part are arranged perpendicularly.

[0086] Preferably, the pump body with an exhaust valve includes a valve cap 34. The valve cap 34 is installed on the floating body 21. A ventilation hole 343 is provided on the valve cap 34. The ventilation hole 343 is communicated with the third channel 210.

[0087] Preferably, the valve cap 34 is threadedly connected to the floating body 21. A frustum part 341 is provided inside the top end of the valve cap 34. A part of the structure of the frustum part 341 can enter the third channel 210 and press against the edge of the third channel 210. Further preferably, the top opening of the third channel 210 is flared outward to facilitate the quick overflow of gas.

[0088] Obviously, the above embodiments of the present utility model are merely examples for clearly explaining the present utility model, rather than limitations on the implementation manners of the present utility model. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the claims of the present utility model.

Claims

1. A pump body with an exhaust valve, characterized in that, It includes a metal pump body (1) and an exhaust valve assembly (2), and an exhaust valve body (36) is provided on the metal pump body (1); The exhaust valve assembly (2) includes: A floating body (21) which is arranged inside the exhaust valve body (36). A sealing ring (35) for sealing the gap between the floating body (21) and the exhaust valve body (36) is arranged between the floating body (21) and the exhaust valve body (36), and the floating body (21) can lift and float relative to the exhaust valve body (36); A valve core (22). An installation hole (220) is formed on the side wall of the floating body (21), and the central axis of the installation hole (220) is arranged along the radial direction of the floating body (21); The valve core (22) is installed in the installation hole (220) and is threadedly connected to the installation hole (220). An exhaust passage is formed inside the valve core (22) and the floating body (21); A valve rod (23) and a spring (24). The valve rod (23) is coaxially arranged with the valve core (22), the valve rod (23) can seal the inlet of the exhaust passage, one end of the spring (24) is connected to the valve core (22), and the other end is connected to the valve rod (23); A valve body (25) which is arranged below the floating body (21). The floating body (21) can drive the valve body (25) to descend synchronously to drive the valve rod (23) to open the inlet of the exhaust passage; When the valve body (25) rises, the spring (24) resets to drive the valve rod (23) to seal the inlet of the exhaust passage.

2. The pump body with an exhaust valve according to claim 1, wherein A first helical tooth portion (223) is arranged on the valve core (22), a second helical tooth portion (231) is arranged on the valve rod (23), one end of the spring (24) is connected to the first helical tooth portion (223), and the other end is connected to the second helical tooth portion (231).

3. The pump body with an exhaust valve according to claim 1, characterized in that, When the valve body (25) moves downward, one end of the valve rod (23) is pulled to incline downward, the spring (24) is bent and deformed, and the valve rod (23) and the valve core (22) are opened.

4. The pump body with an exhaust valve according to claim 1, characterized in that, The central axis of the exhaust valve assembly (2) is parallel to the central axes of both the water inlet and the water outlet of the metal pump body (1).

5. The pump body with an exhaust valve according to any one of claims 1-3, characterized in that, The exhaust passage includes a first passage (221) and a second passage (222). A third passage (210) is formed on the floating body (21). The first passage (221) is arranged along the axial direction of the installation hole (220), the second passage (222) is arranged along the axial direction of the floating body (21), the first passage (221) is communicated with both the second passage (222) and the third passage (210), and the third passage (210) is arranged along the axial direction of the floating body (21).

6. The pump body with an exhaust valve according to claim 5, characterized in that, A first thread portion (228) is arranged at the outer end of the valve core (22), and the first thread portion (228) is located on one side of the second passage (222); A first seal (26) is provided between the valve core (22) and the floating body (21), and the first seal (26) is located between the first threaded portion (228) and the second channel (222); and / or a second seal (27) is further provided between the valve core (22) and the mounting hole (220). The second seal (27) is provided on the other side of the second channel (222). A second mounting groove (29) is provided on the valve core (22), and the second seal (27) is provided in the second mounting groove (29); The cross-sectional shape of the second seal (27) is the same as the cross-sectional shape of the first seal (26), and the cross-sectional area of the second seal (27) is larger than the cross-sectional area of the first seal (26).

7. The pump body with an exhaust valve according to claim 6, characterized in that, A first mounting groove (28) is provided on the valve core (22), and the first seal (26) is provided in the first mounting groove (28); The minimum distance between the first mounting groove (28) and the first threaded portion (228) along the axial direction of the mounting hole (220) is a first preset distance, and the range of the first preset distance is 1 mm - 2 mm.

8. The pump body with an exhaust valve according to claim 7, characterized in that, The minimum distance between the first mounting groove (28) and the second channel (222) along the axial direction of the mounting hole (220) is a second preset distance, and the range of the second preset distance is 0.6 mm - 2 mm.

9. The pump body with an exhaust valve according to any one of claims 1-3, characterized in that, A gasket (232) is provided at the end of the valve stem (23), and the gasket (232) can block the inlet of the exhaust passage.

10. A pump, characterized in that, Including the pump body with an exhaust valve according to any one of claims 1 - 9.

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