CN210318757U

CN210318757U - Stop valve that leakproofness is good

Info

Publication number: CN210318757U
Application number: CN201920366787.1U
Authority: CN
Inventors: 董春景
Original assignee: Yancheng Fair Truemark Valves Corp
Current assignee: Yancheng Fair Truemark Valves Corp
Priority date: 2019-03-22
Filing date: 2019-03-22
Publication date: 2020-04-14
Anticipated expiration: 2029-03-22

Abstract

The utility model discloses a stop valve that leakproofness is good, which comprises a valve body, the inner chamber left and right sides of valve body flows the mouth by left medium respectively and constitutes with right medium flow mouth, left medium flow mouth and right medium flow mouth are separated into to the inner chamber left and right sides of valve body, the through-hole has been seted up to the junction that left side medium flows mouth and right medium flow mouth, left side medium flow mouth the inner chamber right side bottom with the corresponding position department of through-hole with the inner chamber left side top that right side medium flows the mouth all bonds with the corresponding position department of through-hole has the sealing washer, the inner chamber bottom left side interference fit of right side medium flow mouth has the outer loop of bearing, and the inner ring interference fit of bearing has the valve rod. This stop valve that leakproofness is good can avoid single flashboard wearing and tearing back, can't seal the inner chamber of valve body, and then causes the medium seepage, and has avoided valve rod and valve gap and valve body and pipe connection department to appear the gap, has improved the leakproofness of stop valve, and the practicality is strong.

Description

Stop valve that leakproofness is good

Technical Field

The utility model relates to the technical field of valves, specifically be a stop valve that leakproofness is good.

Background

The stop valve, also called stop valve, is a valve used most widely, it is popular because the friction between the sealing surfaces is small in the opening and closing process, it is durable, the opening height is not large, it is easy to manufacture, it is convenient to maintain, it is not only suitable for middle and low pressure, but also suitable for high pressure, the closing principle of the stop valve is, rely on the pressure of the valve lever, make the sealing surface of the valve clack and sealing surface of the valve seat closely joint, prevent the medium from circulating, the valve plays the important role of cutting off and throttling to the medium in the pipeline where it is located, the stop valve is an extremely important cut off type valve, its seal is through exerting the torque to the valve stem, the valve stem exerts the pressure to the valve clack in the axial direction, make the sealing surface of the valve clack and sealing surface of the valve seat closely joint, prevent the medium from leaking along the gap between the sealing surfaces, the existing stop valve in, and then appear the gap and cause the medium seepage, and valve rod and valve gap and valve body and pipe connection department because factors such as installation operation is improper and product specification, the gap often can appear, and then can't be sealed completely with the stop valve to influence the leakproofness of stop valve, consequently for solving above-mentioned problem, need design a stop valve that the leakproofness is good.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stop valve that leakproofness is good to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a stop valve with good sealing performance comprises a valve body, wherein the left side and the right side of an inner cavity of the valve body are respectively composed of a left medium flow port and a right medium flow port, the left side and the right side of the inner cavity of the valve body are divided into a left medium flow port and a right medium flow port, a through hole is formed in the joint of the left medium flow port and the right medium flow port, sealing rings are bonded at the position, corresponding to the through hole, of the right side bottom end of the inner cavity of the left medium flow port and the position, corresponding to the through hole, of the left side top end of the inner cavity of the right medium flow port, an outer ring of a bearing is in interference fit with the left side of the bottom end of the inner cavity of the right medium flow port, a valve rod is in interference fit with an inner ring of the bearing, the top end of the valve rod penetrates through the inner cavity of the through hole and extends out of the upper surface of the, the inner side of the outer wall of the T-shaped rod is inserted with a flashboard, the bottom end of the outer wall of the valve rod is provided with a positive thread and a negative thread which are in threaded connection with the flashboard, the top end of the valve body is in bolted connection with a valve cover, the top ends of the inner wall of the valve cover and the inner wall of the valve body are both provided with a clamping groove and are clamped with a sealing gasket through the clamping groove, the top end of the valve rod penetrates through the sealing gasket and extends out of the upper surface of the valve cover, the top end of the valve rod is clamped with a hand wheel, the top end of the outer wall of the valve rod is in key connection with a ratchet wheel, the outer side of the top end of the valve cover is in shaft connection with a pawl which is inserted with the ratchet wheel, the outer side left end of the spring leaf is in screw connection with the right side of the outer wall of the pawl, the left side and the right side, the left side and the right side of the connecting pipe are both bonded with gaskets.

Preferably, the cross section of the inner cavity of the through hole is circular, and the diameter of the inner cavity of the sealing ring is the same as that of the cross section of the inner cavity of the through hole.

Preferably, the length of the upper and lower positive and negative threads is the same.

Preferably, the distance between two T-shaped rods on the same horizontal line is larger than the diameter of the outer diameter of the sealing ring.

Preferably, the top end of the valve cover is circular, and the diameter of the top end of the valve cover is larger than the outer diameter of the ratchet wheel.

Compared with the prior art, the beneficial effects of the utility model are that: this stop valve that leakproofness is good, the junction through the packing ring to the pipeline seals, seal up the gap in valve rod and valve body and valve gap's junction gap through sealed the pad, through the hand wheel, the cooperation of valve rod and positive and negative screw thread, make two flashboards from top to bottom reciprocate so that the through-hole is opened and is closed, and compress tightly the pawl through the spring leaf, make pawl and ratchet peg graft, with the locking valve rod, thereby can avoid single flashboard wearing and tearing back, can't seal the inner chamber of valve body, and then cause the medium seepage, and avoided valve rod and valve gap and valve body and pipe connection department to appear the gap, the leakproofness of stop valve has been improved, therefore, the clothes hanger is strong in practicability.

Drawings

Fig. 1 is a front sectional view of the present invention;

FIG. 2 is an enlarged view of the point A of the present invention;

fig. 3 is a top cross-sectional view of the present invention;

fig. 4 is a schematic front sectional view of the valve cover of the present invention.

In the figure: 1. the valve comprises a valve body, 2, a left medium flow port, 3, a right medium flow port, 4, a through hole, 5, a sealing ring, 6, a bearing, 7, a valve rod, 8, a flashboard, 9, a T-shaped rod, 10, a valve cover, 11, a sealing gasket, 12, a hand wheel, 13, a flange plate, 14, a connecting pipe, 15, a gasket, 16, a positive thread, a negative thread, 17, a ratchet wheel, 18, a spring plate, 19 and a pawl.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a stop valve with good sealing performance comprises a valve body 1, the left side and the right side of an inner cavity of the valve body 1 are respectively composed of a left medium flow port 2 and a right medium flow port 3, the left side and the right side of the inner cavity of the valve body 1 are divided into a left medium flow port 2 and a right medium flow port 3, a through hole 4 is arranged at the joint of the left medium flow port 2 and the right medium flow port 3, a sealing ring 5 is bonded at the position corresponding to the through hole 4 at the bottom end of the right side of the inner cavity of the left medium flow port 2 and the position corresponding to the through hole 4 at the top end of the left side of the inner cavity of the right medium flow port 3, an outer ring of a bearing 6 is in interference fit with an inner ring of the bearing 6, a valve rod 7 is in interference fit with the inner ring of the bearing 6, the bearing 6 is made of stainless steel to prevent the bearing 6 from being corroded by the medium and further influencing the, the left side and the right side of the right bottom end of the inner cavity of the left medium flow port 2 and the left side and the right side of the left top end of the inner cavity of the right medium flow port 3 are respectively in screw connection with a T-shaped rod 9, the T-shaped rod 9 can limit the flashboard 8, the flashboard 8 is inserted into the inner side of the outer wall of the T-shaped rod 9, the bottom end of the outer wall of the valve rod 7 is provided with a positive thread 16 and a negative thread 16 which are in screw connection with the flashboard 8, the valve rod 7 and the positive thread 16 are both made of stainless steel materials to prevent the flashboard 7 from being corroded by a medium, the valve rod 7 can be rotated by rotating a hand wheel 12 to enable the upper flashboard 8 and the lower flashboard 8 to move up and down under the rotating force of the positive thread 16 to enable the flashboard 8 to be separated upwards or to extrude the sealing ring 5 downwards to open and close the through hole 4, the, the sealing gasket 11 is made of rubber to increase the sealing performance between the valve rod 7 and the joint of the valve body 1 and the valve cover 10, the top end of the valve rod 7 is connected with a hand wheel 12 in a clamping manner, the top end of the outer wall of the valve rod 7 is connected with a ratchet wheel 17 in a key manner, the outer side of the top end of the valve cover 10 is connected with a pawl 19 in a shaft manner, the pawl 19 is inserted into the ratchet wheel 17 in a shaft manner, the outer side of the top end of the valve cover 10 is connected with a spring piece 18 in a screw manner, the spring piece 18 has an elastic coefficient of 16N/CM, the spring piece 18 is stretched or extruded to generate elastic deformation, and is recovered to an initial state after external force is removed, the left end of the rear side of the spring piece 18 is contacted with the right side of the outer wall of the pawl 19, the spring piece 18 pushes the pawl 19 inwards to be inserted into a tooth, the inner cavities of the left medium flow port 2 and the right medium flow port 3 extend out of the outer sides of the two connecting pipes 14 respectively, gaskets 15 are bonded to the left side and the right side of each connecting pipe 14, and the gaskets 15 are made of rubber materials so as to increase the sealing performance between the connecting positions of the valve body 1 and the pipeline.

As a preferred scheme, further, the cross section of the inner cavity of the through hole 4 is circular, and the diameter of the inner cavity of the sealing ring 5 is the same as that of the cross section of the inner cavity of the through hole 4, so that the inner cavities of the upper and lower sealing rings 5 are completely attached to the inner cavity of the through hole 4, and the sealing performance of the through hole 4 is further improved.

Preferably, the upper and lower positive and negative threads 16 have the same length, so that the stroke of the upper and lower shutters 8 is the same, and the upper and lower shutters 8 can simultaneously press the sealing ring 5 downwards or separate from the sealing ring 5, so that the through hole 4 is closed and opened.

Preferably, the distance between the two T-shaped bars 9 located on the same horizontal line is larger than the outer diameter of the sealing ring 5, so that the shutter 8 can press the sealing ring 5 and thus close the through hole 4.

Preferably, the top end of the valve cap 10 is circular, and the diameter of the top end of the valve cap 10 is larger than the outer diameter of the ratchet 17, so as to prevent the ratchet 17 from being too large, so that the pawl 19 pushes the ratchet 17 too little to lock the valve rod 7.

The detailed connection means is a technique known in the art, and the following mainly describes the working principle and process, and the specific operation is as follows.

When the stop valve is installed, a worker respectively sleeves the connecting pipes on two sides outside the connecting pipe 14 to seal the connecting position of the pipeline through the gasket 15 so as to prevent a medium from leaking, the connecting pipes are connected with the flange 13 through screws so as to fix the valve body 1 in the pipeline, when the stop valve is opened, the worker outwards stirs the spring piece 18 to enable the pawl 19 to be separated from the tooth socket of the ratchet wheel 17 to be inserted, the locking state of the valve rod 7 is released, the hand wheel 12 rotates the valve rod 7 anticlockwise, the hand wheel 12 drives the valve rod 7 to rotate anticlockwise so as to enable the upper and lower flashboards 8 to outwards move under the action of the rotating force of the positive and negative threads 16, the flashboards 8 are limited through the T-shaped rod 9 so as to enable the flashboards 8 to stop extruding the sealing ring 5 and open the through holes 4, therefore, the medium can pass through the through holes 4 from the left medium flow port 2 to enter, and promote the tooth's socket that the pawl 19 reinserted ratchet 17 to the inboard, and then locking valve rod 7, when the stop valve was closed, clockwise rotation hand wheel 12, two flashboards 8 move and extrusion sealing washer 5 to the inboard about making, thereby seal through-hole 4, so that the valve body closes, and seal up the gap in the junction gap of valve rod 7 and valve body 1 and valve gap 10 through sealed the pad 11, thereby can avoid single flashboard 8 wearing and tearing back, can't seal valve body 1, cause the medium seepage, and avoided valve rod 7 and valve gap 10 and valve body 1 and pipeline junction to appear the gap, the leakproofness of stop valve has been improved, therefore, the clothes hanger is strong in practicability.

In the description of the present invention, it is to be understood that the terms "top end", "bottom end", "one end", "front side", "rear side", "other end", "upper", "lower", "outer", "inner", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated; also, unless expressly stated or limited otherwise, the terms "screw connection," "coupling," "plug-in," "welding," and the like are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a stop valve that leakproofness is good, includes valve body (1), its characterized in that: the left side and the right side of the inner cavity of the valve body (1) are respectively composed of a left medium flow port (2) and a right medium flow port (3), the left side and the right side of the inner cavity of the valve body (1) are separated into the left medium flow port (2) and the right medium flow port (3), a through hole (4) is arranged at the joint of the left medium flow port (2) and the right medium flow port (3), a sealing ring (5) is respectively bonded at the position corresponding to the through hole (4) at the bottom end of the right side of the inner cavity of the left medium flow port (2) and the position corresponding to the through hole (4) at the top end of the left side of the inner cavity of the right medium flow port (3), an outer ring of a bearing (6) is in interference fit with the bottom end of the inner cavity of the right medium flow port, a valve rod (7) is in interference fit with the inner ring of the bearing (6), the top end of the valve rod (7) penetrates, the left side and the right side of the right bottom end of the inner cavity of the left medium flow port (2) and the left side and the right side of the left top end of the inner cavity of the right medium flow port (3) are respectively connected with a T-shaped rod (9) through screws, the inner side of the outer wall of the T-shaped rod (9) is inserted with a flashboard (8), the bottom end of the outer wall of the valve rod (7) is provided with a positive thread and a negative thread (16) which are in threaded connection with the flashboard (8), the top end of the valve body (1) is in bolted connection with a valve cover (10), the top ends of the inner wall of the valve cover (10) and the inner wall of the valve body (1) are respectively provided with a clamping groove and are clamped with a sealing gasket (11) through the clamping groove, the top end of the valve rod (7) penetrates through the sealing gasket (11) and extends out of the upper surface of the valve cover (10), the top end of the valve rod (7, the top outside screw connection of valve gap (10) has spring leaf (18), the rear side left end of spring leaf (18) and the outer wall right side of pawl (19) contact, ring flange (13) have all been welded to the outer wall left and right sides of valve body (1), connecting pipe (14), two have all been welded to the inner chamber left end of left side medium stream mouth (2) and the inner chamber right-hand member of right side medium stream mouth (3) the inner chamber of left side medium stream mouth (2) and right side medium stream mouth (3) is extended respectively in the outside of connecting pipe (14), the left and right sides of connecting pipe (14) all bonds and has packing ring (15).

2. A good seal shut off valve as defined in claim 1 wherein: the cross section of the inner cavity of the through hole (4) is circular, and the diameter of the inner cavity of the sealing ring (5) is the same as that of the cross section of the inner cavity of the through hole (4).

3. A good seal shut off valve as defined in claim 1 wherein: the lengths of the upper and the lower positive and negative threads (16) are the same.

4. A good seal shut off valve as defined in claim 1 wherein: the distance between the two T-shaped rods (9) on the same horizontal line is larger than the diameter of the outer diameter of the sealing ring (5).

5. A good seal shut off valve as defined in claim 1 wherein: the top end of the valve cover (10) is circular, and the diameter of the top end of the valve cover (10) is larger than the outer diameter of the ratchet wheel (17).