Multifunctional foot-operated valve gas switch

Abstract

The utility model discloses a multifunctional foot-operated valve gas switch which comprises a valve casing, the inside of the valve casing is divided into a gas inlet cavity, a conveying cavity and a gas outlet cavity, the conveying cavity is located between the gas inlet cavity and the gas outlet cavity, one end of the valve casing is provided with a valve plug, and the top of the valve plug is provided with a gas inlet pipe. Firstly, the valve shell, the valve plug and the valve rod are connected in a matched mode, so that gas can enter the valve shell to be output in a split-flow mode, the gas is stably output through the third gas outlet pipe, and the gas output size can be controlled through the first gas outlet pipe and the second gas outlet pipe; the fourth sealing ring can assist the valve rod to stretch out and draw back stably, the valve rod is prevented from swinging, then the telescopic protective cover can protect the movably-telescopic valve rod, the structure is reasonable, gas conveying is convenient to control, and multifunctionality is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of dental equipment, in particular to a multifunctional foot-operated valve gas switch. Background Art

[0002] It is mainly used for oral surgery and examination and treatment of oral diseases. Most of them are electric dental chairs. The whole machine is fixed to the ground with a base plate, and the base plate is connected to the upper part of the dental chair through a bracket. The movement of the dental chair is controlled by the control switch on the back of the chair. Its working principle is: the control switch starts the motor to run and drive the transmission mechanism to move the corresponding parts of the dental chair. According to the treatment needs, the control switch button is operated, and the dental chair can complete the actions of rising, falling, tilting, supine and resetting.

[0003] Among them, the dental chair needs to be equipped with an air intake device, but the existing dental chair air intake device cannot control the size of the gas, and thus does not have better applicability. Therefore, a multifunctional foot valve gas switch is urgently needed to control the size of the air intake of the air intake device on the dental chair, which is easy to use and has a multifunctional effect. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a multifunctional foot-operated valve gas switch, which is realized by the following technical solutions.

[0005] A multifunctional foot-operated valve gas switch comprises a valve housing, the interior of the valve housing is divided into an air inlet chamber, a delivery chamber and an air outlet chamber, and the delivery chamber is located between the air inlet chamber and the air outlet chamber, a valve plug is installed at one end of the valve housing, an air inlet pipe is installed on the top of the valve plug, a valve stem is movably connected to the other end of the valve housing, a spring is fixedly connected between the end of the valve stem extending into the interior of the valve housing and the valve plug, and the spring is located in the delivery chamber of the valve housing, a fourth sealing ring is sleeved on the end of the valve stem extending into the air inlet chamber, the delivery chamber of the valve housing is a conical structure, and the outer surface of the end of the valve stem extending to the delivery chamber of the valve housing is an inclined surface.

[0006] Furthermore, the valve housing is threadably matched with the valve plug, and a first sealing ring is sleeved on one end of the valve plug embedded in the interior of the valve housing.

[0007] Furthermore, a second sealing ring and a third sealing ring are sleeved on the outer surface of the valve stem.

[0008] Furthermore, the outer surface of the valve housing is penetrated by a first air outlet pipe, a second air outlet pipe and a third air outlet pipe, the first air outlet pipe and the second air outlet pipe are both connected to the position of the valve housing air outlet cavity, and the third air outlet pipe is connected to the position of the valve housing air inlet cavity.

[0009] Furthermore, an air inlet notch is provided at one end of the valve stem sleeve on which the fourth sealing ring is provided.

[0010] Furthermore, the invention also includes a protective structure, wherein the protective structure is provided with a telescopic protective cover, and the telescopic protective cover is sleeved on one end of the valve stem extending out of the valve housing.

[0011] Furthermore, one end of the telescopic protective cover is fixedly connected to a connecting seat, and the connecting seat is threadedly installed with the valve housing. The other end of the telescopic protective cover is fixedly connected to an extrusion cover, and the extrusion cover is sleeve-connected to the valve stem. A tightening screw is provided between the valve stem and the extrusion cover.

[0012] The beneficial effect of the utility model is that during the operation of the device, firstly, the valve shell, valve plug and valve stem are connected with each other through the cooperation between them, so that the gas can enter the valve shell for diversion and output, wherein the third outlet pipe is provided to ensure the stable output of the gas, the first outlet pipe and the second outlet pipe are provided to control the size of the gas output, the fourth sealing ring is provided to assist the valve stem in stable extension and retraction to avoid the valve stem from swinging, and then the telescopic protective cover is provided to protect the movable and retractable valve stem, the structure is reasonable, the gas delivery is convenient to control, and the utility model has multifunctionality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 : A schematic diagram of the structure of the multifunctional foot-operated valve gas switch of the utility model;

[0015] Figure 2 : The utility model Figure 1 Middle AA section;

[0016] Figure 3 : A schematic diagram of the structure of the valve housing of the utility model;

[0017] Figure 4 : Schematic diagram of the connection between the valve plug, valve stem and spring of the utility model;

[0018] Figure 5 : Schematic diagram of the end face of the valve stem of the utility model.

[0019] The reference numerals are as follows:

[0020] 1. Valve housing; 101. First air outlet pipe; 102. Second air outlet pipe; 103. Third air outlet pipe;

[0021] 2. valve plug; 201. air inlet pipe; 202. first sealing ring;

[0022] 3. Valve stem; 301. Second sealing ring; 302. Third sealing ring; 303. Fourth sealing ring;

[0023] 4. Spring;

[0024] 5. Telescopic protective cover; 501. Connecting seat; 502. Extrusion cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] like Figure 1-4 As shown, the utility model has the following specific embodiments.

[0027] Example:

[0028] A multifunctional foot-operated valve gas switch comprises a valve housing 1, the interior of the valve housing 1 is divided into an air inlet chamber, a delivery chamber and an air outlet chamber, and the delivery chamber is located between the air inlet chamber and the air outlet chamber, a valve plug 2 is installed at one end of the valve housing 1, an air inlet pipe 201 is installed on the top of the valve plug 2, a valve stem 3 is movably connected to the other end of the valve housing 1, a spring 4 is fixedly connected between the end of the valve stem 3 extending into the interior of the valve housing 1 and the valve plug 2, and the spring 4 is located in the delivery chamber of the valve housing 1, a fourth sealing ring 303 is sleeved on the end of the valve stem 3 extending into the air inlet chamber, the delivery chamber of the valve housing 1 is a conical structure, and the outer surface of the end of the valve stem 3 extending to the delivery chamber of the valve housing 1 is an inclined surface.

[0029] By adopting the above technical solution, when using the device, the air inlet device is connected through the air inlet pipe 201, and the air outlet pipe is connected through the first air outlet pipe 101, the second air outlet pipe 102, and the third air outlet pipe 103, wherein the gas entering the air inlet pipe 201 can be directly output through the third air outlet pipe 103, and the third air outlet pipe 103 can keep the amount of the delivered gas stable, and then move by stepping on the valve stem 3, the valve stem 3 can squeeze the spring 4 to move to the left, at this time, the gas entering the valve housing 1 can enter the air outlet cavity, and then be output through the connected first air outlet pipe 101 and the second air outlet pipe 102 In use, the outer surface of one end of the valve stem 3 extending to the delivery cavity of the valve shell 1 can cooperate with the delivery cavity of the valve shell 1 through the design of the inclined surface, so that the size of the gap with the valve shell 1 can be controlled by the depth of the expansion and contraction of the valve stem 3, thereby controlling the size of the gas delivery amount, and then the size of the gas delivery can be controlled by stepping on the valve stem 3. At the same time, the fourth sealing ring 303 sleeved on the valve stem 3 can be movably fitted on the inner wall of the air inlet cavity of the valve shell 1, thereby assisting the movement of the valve stem 3 and avoiding the valve stem 3 from swinging. The structure is reasonable, which is convenient for the device to quantitatively deliver gas and control the size of gas delivery, and has a multi-functional effect.

[0030] Specifically, the valve housing 1 and the valve plug 2 are threadedly matched, and a first sealing ring 202 is sleeved on one end of the valve plug 2 embedded in the valve housing 1 .

[0031] By adopting the above technical solution, the provided valve plug 2 can be connected to one end of the valve housing 1 , and the valve plug 2 is sealed and docked with the valve housing 1 through the first sealing ring 202 .

[0032] Specifically, the outer surface of the valve stem 3 is sleeved with a second sealing ring 301 and a third sealing ring 302 .

[0033] By adopting the above technical solution, the valve stem 3 can seal and connect the valve housing 1 and the valve stem 3 through the third sealing ring 302 and the second sealing ring 301. When the valve stem 3 moves to the left, the third sealing ring 302 sleeved on the valve stem 3 and the valve housing 1 are opened, thereby facilitating its transportation. When the valve stem 3 moves to the rightmost end, the valve stem 3 is sealed and connected to the valve housing 1 through the third sealing ring 302, thereby preventing gas from being input into the air outlet cavity, that is, closing the second air outlet pipe 102 and the first air outlet pipe 101.

[0034] Specifically, the outer surface of the valve housing 1 is penetrated by a first air outlet pipe 101, a second air outlet pipe 102 and a third air outlet pipe 103. The first air outlet pipe 101 and the second air outlet pipe 102 are both connected to the position of the air outlet cavity of the valve housing 1, and the third air outlet pipe 103 is connected to the position of the air inlet cavity of the valve housing 1.

[0035] By adopting the above technical solution, the first gas outlet pipe 101 , the second gas outlet pipe 102 , and the third gas outlet pipe 103 can discharge the gas input into the valve housing 1 .

[0036] Specifically, an air inlet notch is provided at one end of the valve stem 3 on which the fourth sealing ring 303 is sleeved.

[0037] By adopting the above technical solution, the air inlet notch provided at one end of the valve stem 3 can allow the gas to be transported along the edge of the fourth sealing ring 303 .

[0038] Specifically, it also includes a protective structure, the protective structure is provided with a telescopic protective cover 5, and the telescopic protective cover 5 is sleeved on one end of the valve stem 3 extending out of the valve housing 1;

[0039] One end of the telescopic protective cover 5 is fixedly connected to a connecting seat 501, and the connecting seat 501 is threadedly installed with the valve housing 1. The other end of the telescopic protective cover 5 is fixedly connected to an extrusion cover 502, and the extrusion cover 502 is sleeve-connected to the valve stem 3. A tightening screw is provided between the valve stem 3 and the extrusion cover 502.

[0040] By adopting the above technical scheme, the movable valve stem 3 can be protected, that is, the telescopic protective cover 5 can be sleeved on one end of the valve stem 3, and the connecting seat 501 connected to one end of the telescopic protective cover 5 can be fixedly installed with the valve housing 1, and the extrusion cover 502 connected to the other end of the telescopic protective cover 5 can be sleeved on the valve stem 3. By pressing the extrusion cover 502, the valve stem 3 can be driven to move inside the valve housing 1, so that the telescopic protective cover 5 is squeezed and contracted. Conversely, when the valve stem 3 pops out, the telescopic protective cover 5 can be pushed to reset, so that the telescopic protective cover 5 can be wrapped around the outside of the valve stem 3 for protection, and at the same time, it can facilitate the telescopic movement of the valve stem 3, and can prevent dust from adhering to the outer surface of the valve stem 3 and affecting automatic telescoping.

[0041] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A multifunctional foot-operated valve gas switch, comprising a valve housing (1), wherein the interior of the valve housing (1) is divided into an air inlet cavity, a delivery cavity and an air outlet cavity, and the delivery cavity is located between the air inlet cavity and the air outlet cavity, and characterized in that: A valve plug (2) is installed at one end of the valve housing (1), and an air inlet pipe (201) is installed on the top of the valve plug (2). The other end of the valve housing (1) is movably connected to a valve stem (3). A spring (4) is fixedly connected between the end of the valve stem (3) extending into the interior of the valve housing (1) and the valve plug (2), and the spring (4) is located inside the conveying chamber of the valve housing (1). A fourth sealing ring (303) is sleeved on the end of the valve stem (3) extending into the air inlet chamber. The conveying chamber of the valve housing (1) is a conical structure, and the outer surface of the end of the valve stem (3) extending into the conveying chamber of the valve housing (1) is an inclined surface.

2. The multifunctional foot-operated valve gas switch according to claim 1, characterized in that: The valve housing (1) and the valve plug (2) are threadably matched, and one end of the valve plug (2) embedded in the interior of the valve housing (1) is sleeved with a first sealing ring (202).

3. The multifunctional foot-operated gas switch according to claim 1, characterized in that: The outer surface of the valve stem (3) is sleeved with a second sealing ring (301) and a third sealing ring (302).

4. The multifunctional foot-operated gas switch according to claim 1, characterized in that: The outer surface of the valve housing (1) is connected through a first air outlet pipe (101), a second air outlet pipe (102) and a third air outlet pipe (103); the first air outlet pipe (101) and the second air outlet pipe (102) are both connected to the position of the air outlet cavity of the valve housing (1), and the third air outlet pipe (103) is connected to the position of the air inlet cavity of the valve housing (1).

5. The multifunctional foot-operated valve gas switch according to claim 1, characterized in that: An air inlet notch is provided at one end of the valve stem (3) on which the fourth sealing ring (303) is sleeved.

6. The multifunctional foot-operated gas switch according to claim 1, characterized in that: It also comprises a protection structure, wherein the protection structure is provided with a telescopic protection cover (5), and the telescopic protection cover (5) is sleeved on one end of the valve stem (3) extending out of the valve housing (1).

7. The multifunctional foot-operated valve gas switch according to claim 6, characterized in that: One end of the telescopic protective cover (5) is fixedly connected to a connecting seat (501), and the connecting seat (501) is threadedly mounted on the valve housing (1). The other end of the telescopic protective cover (5) is fixedly connected to an extrusion cover (502), and the extrusion cover (502) is sleeve-connected to the valve stem (3), and a tightening screw is provided between the valve stem (3) and the extrusion cover (502).

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