Check valve

Abstract

The utility model discloses a check valve. The check valve comprises a valve body with a valve cavity, wherein the valve cavity is provided with a mounting port; the valve seat is arranged in the valve cavity; the valve cover is arranged on the mounting opening in a covering manner; the valve clack is arranged in the valve body and is matched with the valve seat to form a sealing check; the rocker is connected to the valve clack to enable the valve clack and the rocker to move synchronously; and the fork-shaped piece is arranged to be rotationally connected with the rocker, the fork-shaped piece is fixedly arranged on the valve cover, and when the valve cover covers the mounting opening, the rocker rotates to enable the valve clack to be matched with the valve seat to form sealing non-return. The utility model has the following advantages and effects: the mounting is simple and convenient, and the yield is high, so that the production cost of enterprises is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a valve, in particular to a check valve. Background Art

[0002] A check valve is a valve with a circular disc as the opening and closing part. It blocks the backflow of the medium by its own weight and the pressure of the medium. It is an automatic valve and is also called a non-return valve, one-way valve, reflux valve or isolation valve. The disc movement mode is divided into lifting type and swing type.

[0003] The existing check valve includes a valve body with a valve cavity, a valve disc disposed in the valve cavity, a rocker connected to the valve disc, a fork-shaped piece disposed on the valve cavity wall and rotatably connected to the rocker, and a valve cover disposed on the valve body. The existing fork-shaped piece is mainly installed in two ways: integrally formed with the valve body and fixed to the valve cavity wall by bolts. The integral casting method is affected by the valve body structure and the setting position of the fork-shaped piece, and the molding process is more difficult, resulting in a high defective rate, thereby increasing the processing cost; and the bolt connection method is interfered by the valve body, resulting in a smaller space available for operation during operation, which increases the difficulty of manual installation to a certain extent, thereby increasing the manual installation cost. In response to the above problems, the present invention was conceived. Utility Model Content

[0004] The utility model aims to provide a check valve, which is easy to install and has a high yield rate, thereby reducing the production cost of an enterprise and improving production efficiency.

[0005] The above-mentioned technical purpose of the utility model is achieved through the following technical scheme: a check valve, comprising a valve body with a valve cavity and the valve cavity has an installation port; a valve seat, which is arranged in the valve cavity; a valve cover, which covers the installation port; a valve disc, which is arranged in the valve body and cooperates with the valve seat to form a sealed check valve; a rocker, which is connected to the valve disc so that the two move synchronously; a fork piece, which is arranged to be rotatably connected to the rocker, and the fork piece is fixedly arranged on the valve cover and when the valve cover covers the installation port, the rocker rotates so that the valve disc cooperates with the valve seat to form a sealed check valve.

[0006] By adopting the above technical solution, the fork-shaped piece is arranged on the valve cover, so that the molding process of the fork-shaped piece is not hindered or blocked by the valve body and the valve cavity and has a larger installation operation space, thereby reducing the processing difficulty and installation difficulty of the valve components, making the valve easy to install and having a high yield rate, thereby reducing the company's production costs and improving production efficiency.

[0007] It is further configured as follows: comprising a fastener configured to connect the valve cover and the fork-shaped member, the valve cover is provided with a positioning groove at a position corresponding to the fork-shaped member, the fork-shaped member is embedded in the positioning groove and has a shape adapted thereto.

[0008] By adopting the above technical solution, the fork-shaped member is fixed to the valve cover by fasteners, the production cost of this structure is lower, and the installation position of the fork-shaped member is pre-positioned by the provided positioning groove to ensure assembly accuracy.

[0009] It is further configured as follows: the fastener is a bolt, the bolt is located on the side of the valve cover close to the outside and passes through the valve cover and is threadedly connected to the fork-shaped member, and a sealing gasket is provided between the fork-shaped member and the positioning groove.

[0010] By adopting the above technical solution, the structure arranged on the outside of the valve cover makes the bolt tightening operation more convenient and the operation space larger, and the sealing of the connection is ensured by the arranged sealing gasket.

[0011] It is further configured as follows: the fork-shaped member includes a connecting section connected to the valve cover and an extending section connected to the connecting section and extending into the valve cavity, and a reinforcing rib is provided between the extending section and the connecting section.

[0012] By adopting the above technical solution, the structural strength of the fork-shaped member is ensured by setting the reinforcing ribs.

[0013] It is further configured as follows: it includes a socket arranged on the rocker and for the valve disc to be inserted, a limiting hole whose axis is not parallel to the axis of the socket is formed on both the rocker and the valve disc, the rocker is externally rotatably sleeved on a locking sleeve, and a limiting component is provided between the locking sleeve and the limiting hole to limit the valve disc from detaching from the socket.

[0014] By adopting the above technical solution, the locking sleeve, the limiting assembly and the limiting hole are matched to realize the quick installation between the valve disc and the rocker, making the installation operation of the valve more convenient to improve the production efficiency.

[0015] The further configuration is as follows: the locking sleeve is sleeved on the outer periphery of the limiting hole, the limiting assembly includes a notch arranged on the locking sleeve for connecting the outside world with the limiting hole, a limiting rod inserted into the limiting hole, a clamping spring driving the limiting rod to move toward one end, and a locking hole formed on the locking sleeve for the limiting rod to be inserted and limiting the limiting rod from being separated from the limiting hole; when the limiting rod is inserted into the locking hole, one end of the limiting rod facing away from the locking hole is misaligned with the notch.

[0016] By adopting the above technical solution, the limit rod and the clamping spring are installed into the limit hole through the notch, and the limit rod is driven to move toward one end thereof under the action of the clamping spring, and then the locking sleeve is rotated to move the locking hole to the front of the corresponding moving end of the limit rod. The rotation of the locking sleeve is limited by inserting the limit rod into the locking hole and the fixation of the valve disc and the rocker arm is achieved simultaneously. At this time, one end of the limit rod opposite to the locking hole is misaligned with the notch, so that the limit rod and the clamping spring can be firmly fixed in the limit hole.

[0017] In summary, the utility model has the following beneficial effects: the utility model is easy to install and has a high yield rate, thereby reducing the production cost of the enterprise and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment;

[0019] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0020] Figure 3 It is a schematic diagram of the local structure of an embodiment.

[0021] In the figure: 1. valve chamber; 2. valve body; 3. mounting port; 4. valve seat; 5. valve cover; 6. valve disc; 7. rocker; 8. fork-shaped piece; 81. connecting section; 82. extension section; 9. fastener; 10. positioning groove; 11. sealing gasket; 12. reinforcing rib; 13. jack; 14. limiting hole; 15. locking sleeve; 16. limiting assembly; 161. notch; 162. limiting rod; 163. pressing spring; 164. locking hole. DETAILED DESCRIPTION

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] refer to Figures 1 to 3 A check valve comprises a valve body 2 having a valve cavity 1 and the valve cavity 1 has a mounting opening 3; a valve seat 4 fixedly arranged in the valve cavity 1; a valve cover 5 covering the mounting opening 3 and the valve cover 5 and the valve body 2 are connected by bolts and nuts, that is, the bolts pass through the valve cover 5 and are threadedly connected with the valve body 2 and the nuts; a valve flap 6 is arranged in the valve body 2 and cooperates with the valve seat 4 to form a sealing check valve. A rocker 7 is connected to the valve flap 6 so that the two move synchronously; a fork 8 is arranged to be rotatably connected with the rocker 7, the fork 8 is fixedly arranged on the valve cover 5 and when the valve cover 5 covers the mounting opening 3, the rocker 7 rotates so that the valve flap 6 cooperates with the valve seat 4 to form a sealing check valve.

[0024] The fastener 9 is provided to connect the valve cover 5 and the fork-shaped member 8. The valve cover 5 is provided with a positioning groove 10 corresponding to the position of the fork-shaped member 8. The fork-shaped member 8 is embedded in the positioning groove 10 and its shape is adapted thereto. The fastener 9 is a bolt, which is located on the side of the valve cover 5 close to the outside and passes through the valve cover 5 and is threadedly connected to the fork-shaped member 8. A sealing gasket 11 is provided between the fork-shaped member 8 and the positioning groove 10.

[0025] The fork-shaped member 8 includes a connecting section 81 connected to the valve cover 5 and an extending section 82 integrally connected to the connecting section 81 and extending into the valve cavity 1 , and a reinforcing rib 12 is integrally provided between the extending section 82 and the connecting section 81 .

[0026] The rocker 7 includes a plug hole 13 for inserting the valve flap 6, and the rocker 7 and the valve flap 6 are both provided with a limit hole 14 whose axis is not parallel to the axis of the plug hole 13, and the axis of the limit hole 14 is perpendicular to the axis of the plug hole 13. The rocker 7 is externally rotatably sleeved with a locking sleeve 15, and a limit assembly 16 is provided between the locking sleeve 15 and the limit hole 14 to limit the rocker 7 from being separated from the plug hole 13.

[0027] The locking sleeve 15 is sleeved on the outer circumference of the limiting hole 14, and the limiting assembly 16 includes a notch 161 formed on the locking sleeve 15 for connecting the outside with the limiting hole 14, a limiting rod 162 inserted into the limiting hole 14, a pressing spring 163 driving the limiting rod 162 to move toward one end, and a locking hole 164 formed on the locking sleeve 15 and for the limiting rod 162 to be inserted and to limit the limiting rod 162 from being separated from the limiting hole 14. When the limiting rod 162 is inserted into the locking hole 164, one end of the limiting rod 162 facing away from the locking hole 164 is misaligned with the notch 161, and one end of the limiting rod 162 is fixedly connected to the pressing spring 163.

[0028] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A check valve, comprising a valve body (2) having a valve cavity (1), wherein the valve cavity (1) has a mounting opening (3); a valve seat (4) disposed in the valve cavity (1); a valve cover (5) covering the mounting opening (3); a valve flap (6) disposed in the valve body (2) and cooperating with the valve seat (4) to form a sealing check valve; a rocker (7) connected to the valve flap (6) so that the two move synchronously; and a fork member (8) disposed to be rotatably connected to the rocker (7), characterized in that: The fork-shaped member (8) is fixedly arranged on the valve cover (5) and when the valve cover (5) is covered on the installation opening (3), the rocker (7) rotates so that the valve flap (6) cooperates with the valve seat (4) to form a sealing check, comprising a fastener (9) arranged to connect the valve cover (5) and the fork-shaped member (8), the valve cover (5) is provided with a positioning groove (10) at a position corresponding to the fork-shaped member (8), and the fork-shaped member (8) is embedded in the positioning groove (10) and has a shape adapted thereto.

2. The check valve according to claim 1, characterized in that: The fastener (9) is a bolt, which is located on the side of the valve cover (5) close to the outside and passes through the valve cover (5) to be threadedly connected to the fork-shaped member (8). A sealing gasket (11) is provided between the fork-shaped member (8) and the positioning groove (10).

3. The check valve according to claim 1, characterized in that: The fork-shaped member (8) comprises a connecting section (81) connected to the valve cover (5) and an extending section (82) connected to the connecting section (81) and extending into the valve cavity (1), and a reinforcing rib (12) is provided between the extending section (82) and the connecting section (81).

4. The check valve according to claim 1, characterized in that: The invention comprises an insertion hole (13) arranged on a rocker (7) and for inserting a valve flap (6), a limiting hole (14) whose axis is not parallel to the axis of the insertion hole (13) is formed on both the rocker (7) and the valve flap (6), the rocker (7) is externally rotatably sleeved on a locking sleeve (15), and a limiting component (16) is provided between the locking sleeve (15) and the limiting hole (14) for limiting the valve flap (6) from being separated from the insertion hole (13).

5. The check valve according to claim 4, characterized in that: The locking sleeve (15) is sleeved on the outer circumference of the limiting hole (14); the limiting assembly (16) comprises a notch (161) provided on the locking sleeve (15) for connecting the outside with the limiting hole (14); a limiting rod (162) inserted into the limiting hole (14); a pressing spring (163) for driving the limiting rod (162) to move toward one end; and a locking hole (164) formed on the locking sleeve (15) for the limiting rod (162) to be inserted and for limiting the limiting rod (162) from being separated from the limiting hole (14); when the limiting rod (162) is inserted into the locking hole (164), one end of the limiting rod (162) facing away from the locking hole (164) is misaligned with the notch (161).

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