Pneumatic throttle valve

Abstract

The utility model discloses a pneumatic throttle valve which comprises a valve body, an air inlet is formed in one end of the valve body, a valve element is arranged in the valve body, a throttle valve rod is further arranged in the valve body, a detachable top cover is arranged at the end, away from the air inlet, of the valve body, a nut is arranged in the center of the top cover, an adjusting rod is arranged in the nut, and a hand wheel is arranged at the top of the adjusting rod. A locking cap is arranged outside the adjusting rod, one end of the adjusting rod is rotationally connected with a limiting disc, limiting blocks are distributed on the limiting disc at equal intervals in the circumferential direction, a limiting groove is formed in the inner wall of the valve body, a flexible isolation sleeve is arranged at the top of the limiting disc, a piston is connected to the bottom of the limiting disc, and the top of the air throttle rod is connected with the bottom of the piston. Through the detachable top cover, a user only needs to detach the top cover, the adjusting rod, the limiting disc, the piston and the air throttle rod can be easily taken out, the limiting block is matched with the limiting groove, and it is ensured that the air throttle rod cannot rotate automatically.

Description

TECHNICAL FIELD

[0001] The utility model relates to pneumatic element technical field, concretely relates to a pneumatic throttle valve. BACKGROUND

[0002] The throttle valve is the valve that changes the throttle section or the throttle length to control the fluid flow. The throttle valve and the check valve are parallelly connected and can be combined into the check throttle valve. The throttle valve and the check throttle valve are simple flow control valves, and since the flow of the throttle valve depends on the size of the throttle port area, the area of the throttle port is usually adjusted to realize throttling.

[0003] The utility model discloses a kind of pneumatic throttle valves, including valve body, valve sleeve, adjusting rod and valve core, valve sleeve is sleeved on the outer wall of valve body, valve body is equipped with air inlet, valve sleeve is equipped with exhaust port, valve sleeve is equipped with the connecting channel that is communicated with air inlet and exhaust port, valve body is equipped with the valve core in air inlet, the center of valve core is equipped with air inlet hole, adjusting rod bottom is conical, and adjusting rod bottom passes through valve sleeve and extends into air inlet hole, valve sleeve is equipped with adjusting cap, adjusting cap extends into valve sleeve and is connected with adjusting rod top, adjusting cap inner wall is equipped with limit tooth, valve sleeve periphery is equipped with with limit tooth matched limit slot. The pneumatic throttle valve has the characteristics that structure is simple, adjusting exhaust flow is convenient, and it is convenient to lock. However, the defects of the pneumatic throttle valve are: when the throttle valve needs to be maintained, it cannot be quickly disassembled, and when the user rotates adjusting rod, throttle valve rod will be rotated simultaneously, so that throttle valve rod rotation and valve core contact, affect the use effect of throttle valve, therefore, currently need a kind of pneumatic throttle valve that is convenient to maintain and prevents throttle valve rod rotation. UTILITY MODEL CONTENTS

[0004] In view of the above problems, a kind of pneumatic throttle valve is provided, by the detachable top cover, user only needs to disassemble top cover, adjusting rod, limit disc, piston and throttle valve rod can be easily taken out, so as to quickly replace piston, and the limit block of limit disc is set and is matched with the limit slot of valve body inner wall, ensure that piston and throttle valve rod can only move along the axis of valve body.

[0005] In order to solve the prior art problems, the utility model provides a pneumatic throttle valve, including the valve body, one end of valve body is equipped with the air inlet, the inside of valve body is close to the air inlet and is provided with the valve core, the inside of valve body is also provided with the throttle valve stem that can move to the valve core direction, the one end of valve body is equipped with the detachable top cap that is away from the air inlet, the center of top cap is equipped with the screw cap, the inside of screw cap is equipped with the adjusting rod that is connected with its thread, the top of adjusting rod is equipped with the hand wheel, the outside of adjusting rod is equipped with the locking cap between hand wheel and screw cap, one end of adjusting rod is rotatably connected with the limit disc, the limit disc is equidistantly distributed with the limit block along its circumferential direction, the inner wall of valve body is equipped with the limit slot for the limit block moves along the valve body axis, the top of limit disc is arranged with the flexible isolation sleeve around adjusting rod, the inside of valve body is divided into first chamber and second chamber through flexible isolation sleeve, the bottom of limit disc is connected with the piston, the top of throttle valve stem is connected with the bottom of piston.

[0006] Preferably, the material of the flexible isolation sleeve is composed of industrial rubber material.

[0007] Preferably, the top cap is composed of a screw cap and a threaded sleeve, the screw cap is arranged on the top of the threaded sleeve, the screw cap is arranged at the center of the screw cap, and the threaded groove for threadedly connecting with the threaded sleeve is arranged on the valve body.

[0008] Preferably, one end of the limit slot in the valve body extends to the cutout and forms an opening for the limit block to pass through.

[0009] Preferably, the cutout in the valve body is covered with a horn-shaped cover plate, the uppermost position of the cutout in the valve body is provided with a step, the cover plate is provided with a pressing plate close to the step, the bottom of the threaded sleeve is provided with an upper pressing plate matching the pressing plate, and one end of the flexible isolation sleeve away from the limit disc is pressed between the upper pressing plate and the lower pressing plate.

[0010] Preferably, one end of the cover plate away from the lower pressing plate is provided with an annular baffle capable of abutting against the top of the limit block.

[0011] The utility model has the beneficial effects compared with the prior art:

[0012] 1. Both ends of the piston are detachably connected with the limit disc and the throttle valve stem through screws, the user only needs to disassemble the top cap, and the adjusting rod, the limit disc, the piston and the throttle valve stem can be easily taken out, so that the piston can be quickly replaced.

[0013] 2. The limit block arranged on the limit disc cooperates with the limit slot in the inner wall of the valve body, ensuring that the piston and the throttle valve stem can only move along the axis of the valve body and cannot rotate. This effectively prevents the throttle valve stem and the piston from rotating during movement, thereby reducing wear and tear and prolonging the service life.

[0014] 3, the bottom of the adjusting rod is rotationally connected with the valve body, when rotating the hand wheel to rotate the adjusting rod along the nut, the adjusting rod itself does not rotate the limiting disc, further ensure the stable movement of the throttle valve rod and the piston.

[0015] 4, the cooperation of the limiting block and the limiting groove will cause the piston to produce a small gap during use, in order to avoid the influence of the gap on the sealing of the valve body, therefore, the flexible isolation sleeve separating the piston and the adjusting rod is arranged on the top of the limiting disc, at the same time, the inner part of the valve body is divided into the first chamber and the second chamber, ensure the sealing of the inner part of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a three-dimensional structure schematic view of a pneumatic throttle valve of the utility model.

[0017] Figure 2 is a structure top view of a pneumatic throttle valve of the utility model.

[0018] Figure 3 is a three-dimensional structure schematic view of a pneumatic throttle valve of the utility model. Figure 2 along A-A section view.

[0019] Figure 4 is a three-dimensional structure schematic view of a pneumatic throttle valve of the utility model. Figure 2 along A-A.

[0020] Figure 5 is a split view of a top cover and a valve body of a pneumatic throttle valve of the utility model.

[0021] Figure 6 is a three-dimensional structure schematic view of a pneumatic throttle valve of the utility model.

[0022] Figure 7 is a partial exploded view of a pneumatic throttle valve of the utility model.

[0023] Figure reference: 1, valve body; 11, air inlet; 12, limiting groove; 13, first chamber; 14, second chamber; 15, threaded groove; 16, notch; 161, cover plate; 1611, lower pressing plate; 1612, annular baffle; 17, step; 2, valve core; 3, throttle valve rod; 4, top cover; 41, nut; 42, screw cap; 43, threaded sleeve; 431, upper pressing plate; 5, adjusting rod; 51, hand wheel; 52, locking cap; 53, limiting disc; 54, limiting block; 6, flexible isolation sleeve; 7, piston. DETAILED DESCRIPTION

[0024] In order to further understand the characteristics, technical means and specific purposes and functions reached by the utility model, the utility model is described in further detail below in combination with the drawings and specific embodiments.

[0025] Referring to Figures 1 to 7 As shown in the figure: a pneumatic throttle valve, including a valve body 1, one end of the valve body 1 is provided with an air inlet 11, the inside of the valve body 1 is provided with a valve core 2 near the air inlet 11, the inside of the valve body 1 is also provided with a throttle valve stem 3 which can move to the direction of the valve core 2, the end of the valve body 1 away from the air inlet 11 is provided with a detachable top cover 4, the center of the top cover 4 is provided with a screw cap 41, the screw cap 41 is provided with an adjusting rod 5 which is screwed with it, the top of the adjusting rod 5 is provided with a hand wheel 51, the outside of the adjusting rod 5 is provided with a locking cap 52 between the hand wheel 51 and the screw cap 41, one end of the adjusting rod 5 is rotatably connected with a limiting disc 53, the limiting disc 53 is provided with limiting blocks 54 which are equidistantly distributed along the circumferential direction of the limiting disc 53, the inner wall of the valve body 1 is provided with a limiting groove 12 for the limiting blocks 54 to move along the axis of the valve body 1, the top of the limiting disc 53 is provided with a flexible isolation sleeve 6 around the adjusting rod 5, the inside of the valve body 1 is divided into a first chamber 13 and a second chamber 14 by the flexible isolation sleeve 6, the bottom of the limiting disc 53 is connected with a piston 7, and the top of the throttle valve stem is connected with the bottom of the piston 7.

[0026] The two ends of the piston 7 are detachably connected with the limiting disc 53 and the throttle valve stem through screws, and the user can easily take out the adjusting rod 5, the limiting disc 53, the piston 7 and the throttle valve stem by detaching the top cover 4, so as to quickly replace the piston 7.

[0027] The limiting blocks 54 provided on the limiting disc 53 cooperate with the limiting grooves 12 on the inner wall of the valve body 1 to ensure that the piston 7 and the throttle valve stem 3 can only move along the axis of the valve body 1, and cannot rotate by itself. Effectively prevent the self-rotation of the throttle valve stem 3 and the piston 7 during movement, thereby reducing wear and tear and prolonging service life.

[0028] The bottom of the adjusting rod 5 is rotatably connected with the valve body 1, and when the adjusting rod 5 is rotated along the screw cap 41 by rotating the hand wheel 51, the adjusting rod 5 itself will not rotate the limiting disc 53, further ensuring the stable movement of the throttle valve stem 3 and the piston 7.

[0029] Under the cooperation of the limiting blocks 54 and the limiting grooves 12, the piston 7 will produce a small gap during use. In order to avoid the influence of the gap on the sealing performance of the valve body 1, a flexible isolation sleeve 6 is arranged on the top of the limiting disc 53 to separate the piston 7 and the adjusting rod 5, and at the same time divide the inside of the valve body 1 into a first chamber 13 and a second chamber 14, to ensure the sealing performance of the inside of the valve body 1.

[0030] Referring to Figure 3 As shown in the figure: the material of the flexible isolation sleeve 6 is composed of industrial rubber material.

[0031] By the flexible isolation sleeve 6 made of industrial rubber material, mechanical stress caused by fluid flow or valve operation can be resisted, and in the pneumatic throttle valve, the isolation of the internal fluid of the valve from the external environment is ensured to prevent leakage.

[0032] Referring to Figure 1 , Figure 3 and Figure 4 : the top cover 4 is composed of a screw cap 42 and a threaded sleeve 43, the screw cap 42 is arranged at the top of the threaded sleeve 43, and the screw cap 41 is arranged at the center of the screw cap 42. The valve body 1 is provided with a threaded groove 15 for matching the threaded sleeve 43.

[0033] The screw cap 42 is arranged at the top of the threaded sleeve 43, and the screw cap 42 can be easily combined or separated with the threaded sleeve 43 through rotation. The threaded sleeve 43 matches the threaded groove 15 on the valve body 1, and is fastened through threaded connection, so that the convenience of assembly and disassembly is provided.

[0034] Referring to Figure 3 and Figure 4 : one end of the limiting groove 12 in the valve body 1 extends to the cutout 16 and forms an overpass for the limiting block 54 to pass through.

[0035] When the piston 7 needs to be disassembled, the limiting block 54 on the limiting disc 53 can easily pass through the overpass formed by the limiting groove 12 extending to the cutout 16, so that the piston 7 and the throttle valve rod 3 can be removed faster, reducing the maintenance time and cost.

[0036] Referring to Figure 3 , Figure 4 , Figure 6 and Figure 7 : the cutout 16 in the valve body 1 is covered with a flared cover plate 161, the uppermost position of the cutout 16 in the valve body 1 is provided with a step 17, the cover plate 161 is provided with a pressing plate 1611 close to the step 17, which can tightly fit with the step 17, and the bottom of the threaded sleeve 43 is provided with an upper pressing plate 431 which matches with the lower pressing plate 1611, and the end of the flexible isolation sleeve 6 away from the limiting disc 53 is pressed between the upper pressing plate 431 and the lower pressing plate 1611.

[0037] When assembling, the cover plate 161 is first placed on the cutout 16 of the valve body 1, at this time the lower pressing plate 1611 tightly fits on the step 17 of the valve body 1, then the upper end of the flexible isolation sleeve 6 on the limiting disc 53 is placed on the top of the lower pressing plate 1611, and then the threaded sleeve 43 is screwed into the threaded groove 15 of the valve body 1 by rotating the knob, at this time the upper pressing plate 431 at the bottom of the threaded sleeve 43 presses the upper end of the flexible isolation sleeve 6 placed on the lower pressing plate 1611, and the flexible isolation sleeve 6 is successfully installed in the throttle valve, providing a reliable isolation barrier for the fluid.

[0038] Referring to Figure 4 As shown in the figure: the end of the cover plate 161 away from the lower pressing plate 1611 is provided with an annular baffle 1612 capable of abutting against the top of the limiting block 54.

[0039] When the throttle body 1 is adjusted, in order to make the throttle body 1 have a working position and a non-working position, the end of the cover plate 161 away from the lower pressing plate 1611 is provided with an annular baffle 1612 capable of limiting the upward distance of the limiting block 54, when the limiting block 54 is in contact with the annular baffle 1612, it indicates that the throttle body 1 is in the non-working position at this time, on the contrary, when the limiting block 54 is lowered to the deepest part of the limiting groove 12 and is in contact with the inner wall of the deepest part of the limiting groove 12, it indicates that the throttle body 1 is in the working position at this time.

[0040] The above embodiment only expresses one or several embodiments of the present application, and the description is more specific and detailed, but it cannot be understood as the limitation of the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A pneumatic throttle valve, comprising a valve body (1), one end of the valve body (1) being provided with an air inlet (11), the inside of the valve body (1) being provided with a valve core (2) near the air inlet (11), and the inside of the valve body (1) being further provided with a throttle valve rod (3) capable of moving towards the valve core (2), characterized in that, The valve body (1) is provided with a detachable top cover (4) at one end away from the air inlet (11), a screw cap (41) is provided at the center of the top cover (4), an adjusting rod (5) is provided in the screw cap (41) and is screwed with the screw cap (41), a hand wheel (51) is provided at the top of the adjusting rod (5), a locking cap (52) is provided between the hand wheel (51) and the screw cap (41) outside the adjusting rod (5), one end of the adjusting rod (5) is rotatably connected with a limiting disc (53), limiting blocks (54) are equidistantly distributed along the circumferential direction of the limiting disc (53), a limiting groove (12) is provided on the inner wall of the valve body (1) for the limiting blocks (54) to move along the axis of the valve body (1), a flexible isolation sleeve (6) is arranged around the adjusting rod (5) at the top of the limiting disc (53), the interior of the valve body (1) is divided into a first chamber (13) and a second chamber (14) by the flexible isolation sleeve (6), a piston (7) is connected to the bottom of the limiting disc (53), and the top of the throttle valve rod is connected with the bottom of the piston (7).

2. A pneumatic throttle valve according to claim 1, characterized in that The material of the flexible isolation sleeve (6) is composed of industrial rubber material.

3. A pneumatic throttle valve according to claim 1, characterized in that The top cover (4) is composed of a screw cap (42) and a threaded sleeve (43), the screw cap (42) is arranged at the top of the threaded sleeve (43), the screw cap (41) is arranged at the center of the screw cap (42), and the valve body (1) is provided with a threaded groove (15) for threadedly connecting with the threaded sleeve (43).

4. A pneumatic throttle valve according to claim 3, characterized in that One end of the limiting groove (12) in the valve body (1) extends to the notch (16) and forms an opening for the limiting block (54) to pass through.

5. A pneumatic throttle valve according to claim 4, characterized in that The notch (16) in the valve body (1) is covered with a flared cover plate (161), the uppermost position of the notch (16) in the valve body (1) is provided with a step (17), the cover plate (161) is provided with a pressing plate (1611) capable of closely contacting the step (17) near the step (17), the bottom of the threaded sleeve (43) is provided with an upper pressing plate (431) matched with the pressing plate (1611), and one end of the flexible isolation sleeve (6) away from the limiting disc (53) is pressed between the upper pressing plate (431) and the pressing plate (1611).

6. A pneumatic throttle valve according to claim 5, characterized in that One end of the cover plate (161) away from the pressing plate (1611) is provided with an annular baffle (1612) capable of abutting against the top of the limiting block (54).

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