Pneumatic amplifier

Abstract

The utility model discloses a pneumatic amplifier which comprises a valve body, a valve cover installed on the valve body, an exhaust ring installed between the valve body and the valve cover, a valve rod movably installed in the valve body and a valve element arranged on the valve rod. The exhaust valve is characterized in that the exhaust ring is provided with a positioning pin for positioning and installing the exhaust ring, the valve body and the valve cover; a valve seat is detachably mounted in the valve body; and a plurality of layers of sealing gaskets for improving the sealing effect are mounted on the valve core. According to the utility model, the exhaust ring is positioned and mounted between the valve body and the valve cover through the positioning pin, and the exhaust ring is pre-positioned and mounted, so that the exhaust ring is convenient to mount, and the mounting efficiency is improved; the valve seat is detachably installed in the valve body, the valve body and the valve seat are sealed, only the valve seat needs to be replaced when the valve needs to be replaced due to long-time abrasion, and therefore the use cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic amplifiers, in particular to a pneumatic amplifier. Background Art

[0002] In the existing technology, the valve cover, valve body and the valve bodies are fixed by screws during installation. During the fixing process, the valve cover, valve body and the mounting holes on the valve body need to be aligned, and they are easy to move during fixing, so as to facilitate the installation of the valve cover, valve body and the valve bodies, which increases the installation time and reduces the installation efficiency. In addition, the valve core in the existing amplifier directly cooperates with the inside of the valve body to control the opening and closing of the amplifier. After long-term use, the contact between the valve body and the valve core is easy to wear, and the valve body needs to be replaced as a whole, which increases the cost of use and reduces the service life. For this reason, a pneumatic amplifier is proposed that can improve the installation efficiency and service life and reduce the cost of use. Summary of the invention

[0003] The purpose of the utility model is to provide a pneumatic amplifier in order to solve the above problems.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pneumatic amplifier, comprising a valve body, a valve cover installed on the valve body, an exhaust ring installed between the valve body and the valve cover, a valve stem movably installed in the valve body, and a valve core arranged on the valve stem; wherein the exhaust ring is provided with a positioning pin for positioning the exhaust ring, the valve body and the valve cover; a valve seat is detachably installed in the valve body; and a plurality of layers of sealing gaskets for improving the sealing effect are installed on the valve core.

[0005] Preferably, the valve body and the valve cover are both provided with positioning holes adapted to the positioning pins.

[0006] Preferably, a lower diaphragm and an upper diaphragm are respectively installed between the exhaust ring and the valve body and the valve cover.

[0007] Preferably, a spring base is installed on the upper diaphragm; and a spring is installed between the spring base and the valve cover.

[0008] Preferably, a drain cover is installed at the bottom of the valve body; and a return spring is installed between the drain cover and the valve core on the valve stem.

[0009] Preferably, the drain cover is also provided with a movable guide groove for guiding the valve stem.

[0010] Preferably, an exhaust valve core used in conjunction with an exhaust ring is also installed at one end of the valve stem in the valve body.

[0011] Preferably, the exhaust ring is provided with a plurality of exhaust holes.

[0012] Preferably, the valve cover is further provided with a signal pressure inlet and an adjusting screw installed thereon; the valve body is further provided with a gas source pressure inlet and an output pressure outlet.

[0013] The beneficial effects of the utility model are as follows: by using the positioning pin to position the exhaust ring between the valve body and the valve cover, the exhaust ring is pre-positioned and installed, thereby facilitating the installation of the exhaust ring and improving the installation efficiency;

[0014] By installing the valve seat detachably in the valve body, the valve body and the valve seat are sealed. When the valve seat needs to be replaced due to long-term wear, only the valve seat needs to be replaced, thereby reducing the cost of use;

[0015] By using multi-layer sealing gaskets to perform multi-layer sealing between the valve core and the valve seat, the sealing performance between the valve core and the valve seat is improved. After the sealing gasket is worn, the outer surface of the valve core can be directly used to contact the valve seat for sealing, thereby extending the service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 This utility model Figure 1 A partial enlarged view of point A in the middle.

[0018] Figure 3 This utility model Figure 1 A partial enlarged view of point B in the middle.

[0019] Figure 4 It is a side view of the utility model.

[0020] Legend: 1. Valve body; 101. Valve seat; 102. Drain cover; 103. Return spring; 104. Movable guide groove; 105. Air source pressure inlet; 106. Output pressure outlet; 2. Valve cover; 201. Signal pressure inlet; 202. Adjusting screw; 3. Exhaust ring; 301. Locating pin; 302. Lower diaphragm; 303. Upper diaphragm; 304. Spring base; 305. Spring; 306. Exhaust hole; 4. Valve stem; 401. Valve core; 402. Sealing gasket; 403. Exhaust valve core; 5. Locating hole. DETAILED DESCRIPTION

[0021] Below we further explain the pneumatic amplifier described in the utility model in conjunction with the accompanying drawings.

[0022] It should be noted that all directional indications such as up, down, left, right, front, back... in the embodiments of the utility model are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Participate in the Figure 1-4 As shown, in this embodiment, a pneumatic amplifier comprises a valve body 1, a valve cover 2 installed on the valve body 1, an exhaust ring 3 installed between the valve body 1 and the valve cover 2, a valve stem 4 movably installed in the valve body 1, and a valve core 401 arranged on the valve stem 4; the exhaust ring 3 is provided with a positioning pin 301 for positioning the exhaust ring 3 and the valve body 1 and the valve cover 2; a valve seat 101 is detachably installed in the valve body 1; a plurality of layers of sealing gaskets 402 for improving the sealing effect are installed on the valve core 401; the exhaust ring 3 is positioned and installed between the valve body 1 and the valve cover 2 by using the positioning pin 301, The air ring 3 is pre-positioned and installed, which facilitates the installation of the exhaust ring 3 and improves the efficiency of the installation; the valve seat 101 is detachably installed in the valve body 1, so that the valve body 1 and the valve seat 101 are sealed. When replacement is required due to long-term wear, only the valve seat 101 needs to be replaced, thereby reducing the cost of use; the multi-layer sealing between the valve core 401 and the valve seat 101 is performed by using a multi-layer sealing gasket 402 to improve the sealing between the valve core 401 and the valve seat 101. After the sealing gasket 402 is worn, the outer surface of the valve core 401 can be directly used to contact the valve seat 101 for sealing, thereby extending the service life.

[0025] Participate in the Figure 2 As shown, the valve body 1 and the valve cover 2 are both provided with positioning holes 5 adapted to the positioning pins 301 ; the positioning pins 301 are installed into the positioning holes 5 on the valve body 1 and the valve cover 2 , thereby facilitating the pre-positioning installation of the exhaust ring 3 .

[0026] Participate in the Figure 1As shown, a lower diaphragm 302 and an upper diaphragm 303 are respectively installed between the exhaust ring 3 and the valve body 1 and the valve cover 2; a spring base 304 is installed on the upper diaphragm 303; a spring 305 is installed between the spring base 304 and the valve cover 2; the upper diaphragm 303 is reset by using the automatic elasticity of the spring, thereby facilitating the reset of the upper diaphragm 303.

[0027] Participate in the Figure 1 As shown, a drain cover 102 is also installed at the bottom of the valve body 1; a return spring 103 is installed between the drain cover 102 and the valve core 401 on the valve stem 4; the drain cover 102 is also provided with a movable guide groove 104 for guiding the valve stem 4; an exhaust valve core 403 used in conjunction with the exhaust ring 3 is also installed at one end of the valve stem 4 in the valve body 1; the valve stem 4 moves up and down along the movable guide groove 104, thereby guiding the valve stem 4 and improving the control accuracy.

[0028] Participate in the Figure 4 As shown, the exhaust ring 3 is provided with a plurality of exhaust holes 306 .

[0029] Participate in the Figure 1 As shown, the valve cover 2 is also provided with a signal pressure inlet 201 and an adjusting screw 202 ; the valve body 1 is also provided with a gas source pressure inlet 105 and an output pressure outlet 106 .

[0030] During the use of the utility model, a small flow rate as a signal source enters the valve cover 2 through the signal pressure inlet 201, the air pressure in the valve cover 2 increases and acts on the upper diaphragm 303, generating a downward force on the diaphragm. When the pressure in the valve cover 2 is greater than the elasticity of the spring 305, the upper diaphragm 303 is pushed downward, the upper diaphragm 303 pushes the lower diaphragm 302 downward, the lower diaphragm 302 pushes the valve stem 4 downward, the valve stem 4 drives the valve core 401 and the exhaust valve core 403 to move downward along the movable guide groove 104 and compresses the reset spring 103, so that the valve core 401 is separated from the valve seat 101, and the air source pressure inlet 105 is connected to the output pressure outlet 106;

[0031] When the signal source at the signal pressure inlet 201 is cancelled, the pressure at the output pressure outlet 106 is greater than the pressure at the valve cover 2, pushing the valve stem 4 to drive the valve core 401 and the exhaust valve core 403 to move upward along the movable guide groove 104, so that the valve core 401 contacts the valve seat 101, and the air source pressure inlet 105 and the output pressure outlet 106 are blocked. The pressure at the output pressure outlet 106 continues to push the lower diaphragm 302 to move upward, so that the exhaust valve core 403 is separated from the exhaust ring 3, and the pressure at the output pressure outlet 106 discharges the pressure through the exhaust hole 306 on the exhaust ring 3 until the pressure between the upper diaphragm 303 and the lower diaphragm 302 is restored to balance, the lower diaphragm 302 moves downward and contacts the exhaust valve core 403, and the exhaust ring 3 stops exhausting.

[0032] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A pneumatic amplifier, comprising a valve body (1), a valve cover (2) mounted on the valve body (1), an exhaust ring (3) mounted between the valve body (1) and the valve cover (2), a valve stem (4) movably mounted in the valve body (1), and a valve core (401) disposed on the valve stem (4); wherein: The exhaust ring (3) is provided with a positioning pin (301) for positioning the exhaust ring (3) with the valve body (1) and the valve cover (2); a valve seat (101) is detachably mounted in the valve body (1); and a plurality of layers of sealing gaskets (402) for improving the sealing effect are mounted on the valve core (401).

2. A pneumatic amplifier according to claim 1, characterized in that: The valve body (1) and the valve cover (2) are both provided with a positioning hole (5) adapted to fit the positioning pin (301).

3. The pneumatic amplifier according to claim 1, characterized in that: A lower diaphragm (302) and an upper diaphragm (303) are respectively installed between the exhaust ring (3), the valve body (1) and the valve cover (2).

4. A pneumatic amplifier according to claim 3, characterized in that: A spring base (304) is installed on the upper diaphragm (303); and a spring (305) is installed between the spring base (304) and the valve cover (2).

5. The pneumatic amplifier according to claim 1, characterized in that: A drain cover (102) is also installed at the bottom of the valve body (1); a return spring (103) is installed between the drain cover (102) and the valve core (401) on the valve stem (4).

6. A pneumatic amplifier according to claim 5, characterized in that: The drain cover (102) is also provided with a movable guide groove (104) for guiding the valve stem (4).

7. The pneumatic amplifier according to claim 1, characterized in that: An exhaust valve core (403) for use with an exhaust ring (3) is also installed at one end of the valve stem (4) in the valve body (1).

8. A pneumatic amplifier according to claim 7, characterized in that: The exhaust ring (3) is provided with a plurality of exhaust holes (306).

9. The pneumatic amplifier according to claim 7, characterized in that: The valve cover (2) is also provided with a signal pressure inlet (201) and an adjusting screw (202); the valve body (1) is also provided with a gas source pressure inlet (105) and an output pressure outlet (106).

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