Switch valve with flow adjusting function

Abstract

The utility model discloses a switch valve with a flow adjusting function. The switch valve comprises a valve body and a valve element assembly. The valve body comprises a mounting cavity, the mounting cavity comprises a first chamber and a second chamber, a sealing ring is embedded in the upper end part of the first chamber, and the valve body further comprises a liquid outlet channel and a liquid inlet channel; the valve element assembly comprises a valve rod, a sealing ring and a spring, the valve rod comprises a valve head and a rod body, the spring is arranged between the rod body and the second cavity, the rod body is provided with a gear shaft penetrating out of the valve body, and the valve body is correspondingly provided with a guide hole; a baffle ring and a head are arranged on the valve head, the head is a stepped column with at least two layers and gradually reduced caliber, and the caliber of an inner hole of the sealing ring is larger than the maximum caliber of the head; the sealing ring is arranged at the lower end of the valve head in a limited mode and is always arranged below the communicating position of the first cavity and the liquid inlet channel in a sealed mode. The switching valve is simple and reasonable in structure, and the position of the valve rod in the valve body can be controlled by driving the gear shaft to move along the guide hole, so that the opening and closing states and the through flow of the switching valve are conveniently switched.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control valves, in particular to a switch valve with a fluid regulating function. Background Art

[0002] On-off valves and regulating valves are two common fluid control valves. On-off valves are used to control the on or off of the fluid flow path, and regulating valves are used to adjust the size of the fluid flow. Both valves are widely used in household appliances such as steam cleaners and floor scrubbers. The design trend of existing household appliances is miniaturization and functionality. However, the above two valve bodies are simultaneously set on the steam cleaner to realize the functions of switching and flow control. Such a multi-valve body structure is obviously not conducive to the compactness and miniaturization of the steam cleaner structure. Therefore, it is very necessary and the general trend to design a valve body that can have both switching and regulating functions. Utility Model Content

[0003] The utility model aims to overcome the defects in the above-mentioned prior art and provides a switch valve with a fluid regulating function, which is suitable for the spray gun of a steam cleaning machine. By driving the rod stop shaft, the valve stem can be driven to move in a directional manner in the valve body to control the working state of the switch valve: by controlling whether the stop ring and the sealing ring are sealed against each other, the open or closed state of the switch valve can be controlled; by controlling different step columns on the head to extend into the inner hole of the sealing ring, the flow rate of the switch valve can be controlled.

[0004] To achieve the above object, the utility model provides a switch valve with flow regulating function, comprising a valve body and a valve core assembly axially slidably installed in the valve body;

[0005] The valve body comprises an axially extending installation cavity, the installation cavity comprises a first cavity located in the axial upper part, and a second cavity located in the axial lower part, a sealing ring is embedded in the upper end of the first cavity, the valve body further comprises a liquid outlet channel connected to the upper port structure of the first cavity, and a liquid inlet channel connected to the middle structure of the first cavity;

[0006] The valve core assembly includes a valve stem, a sealing ring and a spring. The valve stem includes a valve head and a stem body respectively located in a first chamber and a second chamber. The spring is arranged between the stem body and the second chamber so that the valve stem always has a tendency to move axially upward. A gear shaft is arranged on the stem body and penetrates the outside of the valve body. A guide hole is correspondingly arranged on the valve body for the gear shaft to pass through and constrain the axial movement of the gear shaft.

[0007] The valve head is provided with a retaining ring at its upper end for sealingly cooperating with the lower end surface of the sealing ring, and a head portion located above the retaining ring and extending into the inner hole of the sealing ring to control the flow rate, wherein the head portion is a stepped column structure with at least two layers and gradually decreasing diameters, and the inner hole diameter of the sealing ring is larger than the maximum diameter of the head portion;

[0008] The sealing ring is limitedly arranged at the lower end of the valve head and is always hermetically arranged below the connection between the first chamber and the liquid inlet passage.

[0009] It is further arranged that: a limiting protrusion is arranged on the outer wall of the rod body corresponding to its lower end, and the spring is sleeved on the rod body and is in contact connection between the limiting protrusion and the bottom of the second chamber.

[0010] It is further arranged that: a blocking structure matched with the limiting protrusion is correspondingly arranged in the second chamber.

[0011] It is further arranged that: the valve body includes a valve housing and a valve cover which are in threaded fit.

[0012] It is further arranged that: two annular ribs are spacedly arranged on the lower end of the valve head, and an annular embedding groove for embedding the sealing ring is formed by matching between the two annular ribs.

[0013] Compared with the prior art, the utility model has a simple and reasonable structure, and is applicable to the spray gun of a steam cleaner. By driving the gear shaft, the valve rod can be driven to move directionally in the valve body to control the working state of the on-off valve: by controlling whether the retaining ring and the sealing ring are in sealing contact, the on or off state of the on-off valve can be controlled; by controlling different stepped columns on the head to extend into the inner hole of the sealing ring, the flow rate of the on-off valve can be controlled. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a three-dimensional structural schematic diagram of an on-off valve with a flow rate regulating function according to the utility model;

[0015] Figure 2 FIG. is an axial sectional view of the on-off valve Figure 1 ;

[0016] Figure 3 FIG. is an axial sectional view of the on-off valve from another angle Figure 2 。

[0017] The following reference numerals are marked on the drawings in combination with the drawings:

[0018] 10. Valve housing; 11. Liquid inlet joint; 12. Liquid outlet joint; 13. Guide hole; 20. Valve cover; 30. Sealing ring; 40. Valve rod; 41. Retaining ring; 42. Head; 43. Annular rib; 44. Gear shaft; 45. Limiting protrusion; 50. Spring; 60. Sealing ring; A. First chamber; B. Second chamber; C. Liquid inlet passage; D. Liquid outlet passage. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will describe in detail a specific embodiment of the present utility model in conjunction with the accompanying drawings. It should be understood that the protection scope of the present utility model is not limited by the specific embodiment.

[0020] A switching valve with a flow regulation function according to the present utility model is as Figure 1 , Figure 2 and Figure 3 shown, which includes a valve body and a valve core assembly that can move axially and is installed in the valve body. By adjusting the position of the valve core assembly in the valve body, the opening and closing state and the flow rate of the switching valve can be controlled.

[0021] In this embodiment, as Figure 2 and Figure 3 shown, an axially extending installation cavity is constructed in the valve body. The installation cavity includes a first chamber A located in the upper part of the axis and a second chamber B located in the lower part of the axis. A sealing ring 30 is fixedly embedded in the upper end part of the first chamber A. A liquid inlet joint 11 and a liquid outlet joint 12 are also provided on the valve body. The liquid inlet channel C in the liquid inlet joint 11 is communicated with the middle part structure of the first chamber A, and the liquid outlet channel D in the liquid outlet joint 12 is communicated with the upper port structure of the first chamber A; the valve core assembly includes a valve stem 40, a spring 50 and a sealing ring 60. The valve stem 40 includes a valve head and a rod body respectively located in the first chamber A and the second chamber B. The sealing ring 60 is limited and installed at the lower end of the valve head and is always sealed below the connection between the first chamber A and the liquid inlet channel C, effectively preventing the liquid flowing in from the liquid inlet joint 11 from entering the second chamber B. Preferably, two annular ribs 43 are spaced on the lower end of the valve head, and the sealing ring 60 is embedded in the annular groove formed by the cooperation of the two annular ribs 43; a retaining ring 41 for sealingly cooperating with the lower end surface of the sealing ring 30 and a head 42 located above the retaining ring 41 and for extending into the inner hole of the sealing ring 30 to control the flow rate are provided corresponding to the upper end of the valve head. The head 42 is a stepped column structure with at least two layers and a gradually decreasing diameter. The diameter of the inner hole of the sealing ring 30 is larger than the maximum diameter of the head 42. In this way, in the state where the retaining ring 41 is separated from the sealing ring 30, by different cylinders of the head 42 extending into the inner hole of the sealing ring 30, the flow area between the two can be effectively controlled, so as to achieve the effect of regulating the flow rate of the switching valve.

[0022] In this embodiment, as Figure 2 and Figure 3As shown, a limiting protrusion 45 is provided corresponding to the lower end of the stem of the valve stem 40. The spring 50 is sleeved on the stem and is in contact connection between the limiting protrusion 45 and the bottom of the second chamber B so that the valve stem 40 always has a tendency to move axially upward. In this way, under the action of the spring 50, the upper end surface of the retaining ring 41 can be attached and sealed to the lower end surface of the sealing ring 30, so that the on-off valve can be stably in the closed state without external force; preferably, a blocking structure matching the limiting protrusion 45 is correspondingly provided in the second chamber B, so as to limit the maximum stroke of the axial upward movement of the valve stem 40.

[0023] In this embodiment, as Figure 2 and Figure 3 shown, a retaining shaft 44 extending horizontally and passing through the valve body is provided above the limiting protrusion 45 on the stem of the valve stem 40. A guiding hole 13 for the retaining shaft 44 to pass through and restricting the axial movement of the retaining shaft 44 is correspondingly opened on the valve body. In this way, the valve stem 40 can be conveniently driven to move in the valve body through the retaining shaft 44 to achieve the purpose of switching the working state of the on-off valve; at the same time, this patent can also be applied to the spray gun structure of the steam cleaner. By acting on the retaining shaft 44 with the trigger on the spray gun, the state of the on-off valve can be mechanically controlled, which is also beneficial to the miniaturization design of the spray gun.

[0024] In this embodiment, the valve body includes a valve housing 10 and a valve cover 20 that are threadedly engaged with each other, so that the assembly between the valve core assembly and the valve body can be facilitated.

[0025] Compared with the prior art, the structure of the present utility model is simple and reasonable. It is applicable to the spray gun of the steam cleaner. By driving the retaining shaft, the valve stem can be driven to move directionally in the valve body to control the working state of the on-off valve: by controlling whether the retaining ring and the sealing ring are in sealing contact, the on or off state of the on-off valve can be controlled; by controlling the different stepped columns on the head to extend into the inner hole of the sealing ring, the flow rate of the on-off valve can be controlled.

[0026] The above-disclosed are only the embodiments of the present utility model. However, the present utility model is not limited thereto, and any changes that can be thought of by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A switching valve with a flow regulation function, characterized in that It includes a valve body and a spool assembly that is axially slidably installed in the valve body; The valve body includes an axially extending installation cavity, the installation cavity includes a first chamber located in the upper part of the axis and a second chamber located in the lower part of the axis. A sealing ring is embedded in the upper end of the first chamber. The valve body further includes a liquid outlet channel that is structurally communicated with the upper port of the first chamber, and a liquid inlet channel that is structurally communicated with the middle part of the first chamber; The spool assembly includes a valve rod, a sealing ring and a spring. The valve rod includes a valve head and a rod body located in the first chamber and the second chamber respectively. The spring is arranged between the rod body and the second chamber so that the valve rod always has a tendency to move axially upward. A stop shaft that penetrates through the valve body is arranged on the rod body, and a guide hole for the stop shaft to pass through and restrict the axial movement of the stop shaft is correspondingly arranged on the valve body; The valve head is correspondingly provided with a retaining ring for sealingly cooperating with the lower end face of the sealing ring at its upper end, and a head located above the retaining ring and for extending into the inner hole of the sealing ring to control the flow rate. The head is a stepped column structure with at least two layers and gradually decreasing diameters, and the inner hole diameter of the sealing ring is larger than the maximum diameter of the head; The sealing ring is limitedly arranged at the lower end of the valve head and is always sealingly arranged below the connection between the first chamber and the liquid inlet channel.

2. The on-off valve with a flow regulation function according to claim 1, characterized in that, A limiting protrusion is correspondingly arranged on the outer wall of the lower end of the rod body. The spring is sleeved on the rod body and abuts and connects between the limiting protrusion and the bottom of the second chamber.

3. The on-off valve with a flow regulation function according to claim 2, characterized in that, A blocking structure that cooperates with the limiting protrusion is correspondingly arranged in the second chamber.

4. The on-off valve with a flow rate regulating function according to claim 1, characterized in that, The valve body includes a valve shell and a valve cover that are threadedly connected.

5. A switching valve with a flow regulation function according to claim 1, characterized in that, Two annular ribs are spacedly arranged on the lower end of the valve head, and an annular groove for the sealing ring to be embedded is formed by the cooperation between the two annular ribs.

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