Bidirectional sealing rotary ball valve

Abstract

The utility model provides a bidirectional sealing rotary ball valve, which relates to the field of ball valves and comprises a valve body. Flanges are arranged on the two sides of the valve body, a valve ball is arranged in an inner cavity of the valve body, sealing rings are arranged on the two sides of the valve ball in a cushioned mode, and a flow channel is formed between the valve body and the valve ball. The ball valve is provided with a unique locking structure; only when the locking structure is in the open state, a user can screw the handle, and then the opening degree of the ball valve is controlled. It is worth mentioning that the locking structure is designed to be opened only through two-hand operation, and the possibility of accidental opening is greatly reduced; when the locking structure is in a closed state, the lock body tightly clamps the lock cylinder, and the lock cylinder firmly clamps the valve rod, so that the handle cannot be screwed, and the situation that the valve ball rotates due to the fact that the handle is touched by mistake is effectively avoided; the problems that an existing rotary ball valve lacks a locking structure for a valve rod, if a handle is touched accidentally, a valve ball is prone to rotating, and the flow of water passing through the ball valve is changed are solved.

Description

Technical Field

[0001] This utility model belongs to the field of ball valves, and more specifically, it relates to a bidirectional sealing rotary ball valve. Background Technology

[0002] A ball valve is an opening and closing component used to cut off or connect the medium in a pipeline. By rotating the ball 90 degrees, the direction of its through-hole is changed, thus opening or closing the medium. A bidirectional sealing ball valve ensures effective sealing of the valve ball when the medium flows in both directions. It has advantages such as good sealing performance, easy opening, and low flow resistance, and is frequently used in a wide range of fields such as fluid transportation pipelines and hydraulic pipelines. Existing ball valves often lack a locking mechanism for the valve stem. In this case, if the handle is accidentally touched, the valve ball can easily rotate, thereby changing the water flow rate inside the ball valve or causing water waste. Therefore, there is a pressing need in the market for a ball valve with a locking mechanism. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model provides a bidirectional sealing rotary ball valve to address the issue that existing rotary ball valves lack a locking structure for the valve stem, which can easily cause the valve ball to rotate and change the water flow rate inside the ball valve if the handle is accidentally touched.

[0004] This utility model provides a bidirectional sealing rotary ball valve, achieved through the following specific technical means:

[0005] A bidirectional sealing ball valve includes a valve body; flanges are provided on both sides of the valve body, and a valve ball is provided in the inner cavity of the valve body. Sealing rings are placed on both sides of the valve ball, blocking the gap between the valve body and the valve ball, forming a flow channel between them; a valve stem is fixedly connected to the valve ball by bolts, and the upper end of the valve stem has a folded handle, with a slot at the top; a square lower fixing plate is provided above the valve body, and the lower fixing plate is fixedly connected to the upper fixing plate by bolts. The valve stem penetrates the center of both the fixed plate and the upper fixed plate; an annular receiving groove is formed on the upper surface of the upper fixed plate, a washer is inserted into the receiving groove, and the lower end of the handle rests on the washer; a cylindrical connecting seat is provided above the center of the upper fixed plate, the connecting seat has a hollow structure inside, and an arc-shaped groove is formed on one side, through which the lower end of the handle passes; a locking structure is provided above the connecting seat, the locking structure includes a lock body, a lock cylinder and a handle, the lock cylinder is located inside the lock body, and the handle is located above the lock body.

[0006] Furthermore, the lower fixing plate has an annular inclined surface on one side of the upper end of the through hole, and the upper fixing plate has a stepped hole on one side of the lower end of the through hole. The annular inclined surface, the stepped hole and the side wall of the valve stem form a receiving cavity, in which a sealing ring is placed.

[0007] Furthermore, the upper fixed plate is provided with two sets of limiting contacts, and the handle is locked on one side of one set of limiting contacts.

[0008] Furthermore, the lock body includes an internal toothed ring, two sets of side plates are fixedly connected above the internal toothed ring, a top plate is fixedly connected above the side plates, and a through hole is opened in the center of the top plate; the lock cylinder includes a sleeve, the sleeve has a cylindrical inner cavity, the upper end of the valve stem is inserted into the inner cavity, and an insert is provided in the inner cavity, the insert being engaged in a slot.

[0009] Furthermore, the outer side of the sleeve is provided with evenly distributed teeth that mesh with the inner tooth ring; a lifting rod is fixedly connected to the top of the sleeve, and the upper end of the lifting rod passes through a through hole opened in the top plate.

[0010] Furthermore, an arc-shaped limiting protrusion is provided on the inner side of the side plate at a certain height.

[0011] Furthermore, a spring is fitted onto the lifting rod, with the two ends of the spring abutting against the sleeve and the top plate, respectively.

[0012] Furthermore, a stepped hole is provided in the center of the handle; the lifting rod passes through the inner hole of the stepped hole on the handle, and a round handle is provided at the upper end of the lifting rod, which is locked in the stepped hole on the handle.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This utility model is equipped with a unique locking structure; the user can only turn the handle to control the opening degree of the ball valve when the locking structure is in the open state; it is worth mentioning that the locking structure is designed to be opened by both hands, which greatly reduces the possibility of accidental opening; when the locking structure is in the closed state, the lock body tightly locks the lock cylinder, and the lock cylinder firmly locks the valve stem, so that the handle cannot be turned, effectively preventing the valve ball from rotating due to accidental touch of the handle. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 3 This is a utility model Figure 2 Axonometric view of the structure shown.

[0018] Figure 4 This is an axonometric view of the locking structure of this utility model.

[0019] Figure 5This is an exploded view of the locking structure of this utility model.

[0020] Figure 6 This is a schematic diagram of the lock body of this utility model.

[0021] Figure 7 This is a schematic diagram of the lock cylinder of this utility model.

[0022] Figure 8 This is a utility model Figure 2 A magnified view of a portion of point A in the middle.

[0023] Figure 9 This is a cross-sectional view of the locking structure of this utility model.

[0024] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0025] 1. Valve body; 2. Flange; 3. Valve ball; 4. Sealing ring; 5. Flow channel; 6. Valve stem; 7. Handle; 8. Lower fixed plate; 9. Upper fixed plate; 10. Sealing ring; 11. Washer; 12. Limiting contact; 13. Connecting seat; 14. Lock body; 141. Internal toothed ring; 142. Side plate; 143. Top plate; 144. Limiting boss; 15. Slot; 16. Lock cylinder; 161. Sleeve; 162. Lifting rod; 163. Biting tooth; 164. Insert; 165. Round handle; 17. Handle; 18. Spring. Detailed Implementation

[0026] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0027] Example:

[0028] As attached Figure 1 To be continued Figure 9 As shown:

[0029] This utility model provides a bidirectional sealing rotary ball valve, comprising a valve body 1; flanges 2 are provided on both sides of the valve body 1, and a valve ball 3 is provided in the inner cavity of the valve body 1. Sealing rings 4 are placed on both sides of the valve ball 3, blocking the gap between the valve body 1 and the valve ball 3, forming a flow channel 5 between the valve body 1 and the valve ball 3; a valve stem 6 is installed above the valve ball 3 by bolts, and a folded handle 7 is provided at the upper end of the valve stem 6, with a slot 15 at the top of the valve stem 6; a square lower fixing plate 8 is provided above the valve body 1, and the lower fixing plate 8 is fixedly connected to an upper fixing plate 9 by bolts. The valve stem 6 passes through the center of both the lower fixed plate 8 and the upper fixed plate 9. An annular receiving groove is provided on the upper end surface of the upper fixed plate 9, and the washer 11 is inserted into the receiving groove. The lower end of the handle 7 is placed on the washer 11. A cylindrical connecting seat 13 is provided above the center of the upper fixed plate 9. The connecting seat 13 has a hollow structure inside and an arc-shaped groove is provided on one side. The lower end of the handle 7 passes through the arc-shaped groove. A locking structure is provided above the connecting seat 13. The locking structure includes a lock body 14, a lock cylinder 16 and a handle 17. The lock cylinder 16 is located inside the lock body 14, and the handle 17 is located above the lock body 14.

[0030] Among them, such as Figure 8 As shown, the lower fixed plate 8 has an annular inclined surface on one side of the upper end of the through hole, and the upper fixed plate 9 has a stepped hole on one side of the lower end of the through hole. The annular inclined surface, the stepped hole and the side wall of the valve stem 6 form a receiving cavity, in which a sealing ring 10 is placed. The sealing ring 10 has a certain elasticity and blocks the gap between the lower fixed plate 8, the upper fixed plate 9 and the valve stem 6, preventing the water flowing through the valve body 1 from leaking around the valve stem 6.

[0031] Among them, such as Figure 3 As shown, the upper fixed plate 9 is provided with two sets of limit contacts 12. When the handle 7 is locked on one side of one set of limit contacts 12, the ball valve is in the fully open state. If the handle 7 is rotated 90 degrees to lock on one side of the other set of limit contacts 12, the ball valve is in the fully closed state.

[0032] Among them, such as Figure 6 As shown, the lock body 14 includes an internal gear ring 141, two sets of side plates 142 are fixedly connected above the internal gear ring 141, and a top plate 143 is fixedly connected above the side plates 142. A through hole is provided in the center of the top plate 143. Figure 7 As shown, the lock cylinder 16 includes a sleeve 161, which has a cylindrical inner cavity, such as... Figure 9 As shown, the upper end of the valve stem 6 is inserted into the inner cavity, and a insert 164 is provided inside the inner cavity. The insert 164 is stuck in the slot 15, and the handle 7 cannot be turned at this time.

[0033] Among them, such as Figure 7 As shown, the outer side of the sleeve 161 is provided with evenly distributed teeth 163, such as... Figure 9 As shown, the bite teeth 163 and the internal tooth ring 141 mesh with each other; as Figure 7 As shown, a lifting rod 162 is fixedly connected to the upper part of the sleeve 161, as... Figure 9 As shown, the upper end of the lifting rod 162 passes through the through hole opened on the top plate 143; if the lifting rod 162 is lifted upward, the engagement between the teeth 163 and the inner tooth ring 141 is released, and the handle 7 can be rotated at this time.

[0034] Among them, such as Figure 6 As shown, an arc-shaped limiting boss 144 is provided on the inner side of the side plate 142 at a certain height. The limiting boss 144 restricts the movement of the sleeve 161 and prevents the insert 164 from being completely dislodged from the slot 15 when the lifting rod 162 is lifted upward.

[0035] Among them, such as Figure 9 As shown, a spring 18 is sleeved on the lifting rod 162. The two ends of the spring 18 abut against the sleeve 161 and the top plate 143 respectively. After the lifting rod 162 is released, the teeth 163 and the inner tooth ring 141 are engaged again under the compression of the spring 18.

[0036] Among them, such as Figure 9 As shown, a stepped hole is provided in the center of the handle 17; the lifting rod 162 passes through the inner hole of the stepped hole on the handle 17, and a round handle 165 is provided at the upper end of the lifting rod 162, which is locked in the stepped hole on the handle 17; after the handle 17 is lifted upward, the handle 7 can be rotated, and the handle 17 will not rotate with the lifting rod 162.

[0037] The specific usage and function of this embodiment are as follows:

[0038] In this invention, if the handle 7 is engaged on one side of one set of limiting contacts 12, a flow channel 5 is formed between the valve body 1 and the valve ball 3, and the ball valve is in a fully open state; based on this, rotating the handle 7 clockwise ninety degrees to engage on one side of the other set of limiting contacts 12, the ball valve is in a fully closed state; it should be noted that when the locking structure is in the closed state, the teeth 163 of the lock cylinder 16 mesh with the inner tooth ring 141 of the lock body 14, and the insert 164 of the lock cylinder 16 is engaged. The slot 15 at the upper end of the valve stem 6 prevents both the lock cylinder 16 and the valve stem 6 from rotating, and the handle 7 cannot be turned either. Only when the locking structure is open can the handle 7 be turned, lifting the handle 17 upwards. This causes the lock cylinder 16 to move upwards within the lock body 14, disengaging the bite teeth 163 from the internal tooth ring 141, thus opening the locking structure. At this point, the handle 7 can be turned, and turning the handle 7 changes the opening degree of the ball valve. After releasing the handle 17, under the pressure of the spring 18, the bite teeth 163 and the internal tooth ring 141...

[0039] Ring 141 engages again, and the locking structure returns to the closed state.

[0040] Any aspects of this utility model not described in detail are well-known technologies to those skilled in the art.

Claims

1. A bidirectional sealing rotary ball valve, comprising a valve body (1); flanges (2) are provided on both sides of the valve body (1), a valve ball (3) is provided in the inner cavity of the valve body (1), and sealing rings (4) are provided on both sides of the valve ball (3), the sealing rings (4) blocking the gap between the valve body (1) and the valve ball (3), forming a flow channel (5) between the valve body (1) and the valve ball (3); a valve stem (6) is installed above the valve ball (3) by bolt fixing connection, and the upper end of the valve stem (6) is provided with a folded handle. The handle (7) has a slot (15) at the top of the valve stem (6); a square lower fixing plate (8) is provided above the valve body (1), and the upper part of the lower fixing plate (8) is fixedly connected to the upper fixing plate (9) by bolts. The valve stem (6) passes through the center of both the lower fixing plate (8) and the upper fixing plate (9); an annular receiving groove is provided on the upper end surface of the upper fixing plate (9), and a washer (11) is inserted into the receiving groove. The lower end of the handle (7) rests on the washer (11); its characteristic is that: A cylindrical connecting seat (13) is provided above the center of the upper fixed plate (9). The connecting seat (13) has a hollow structure inside and an arc groove is provided on one side. The lower end of the handle (7) passes through the arc groove. A locking structure is provided above the connecting seat (13). The locking structure includes a lock body (14), a lock cylinder (16), and a handle (17). The lock cylinder (16) is located inside the lock body (14), and the handle (17) is located above the lock body (14).

2. The bidirectional sealing rotary ball valve as described in claim 1, characterized in that: The lower fixed plate (8) has an annular inclined surface on one side of the upper end of the through hole, and the upper fixed plate (9) has a stepped hole on one side of the lower end of the through hole. The annular inclined surface, the stepped hole and the side wall of the valve stem (6) form a receiving cavity, in which a sealing ring (10) is placed.

3. The bidirectional sealing rotary ball valve as described in claim 1, characterized in that: The upper fixed plate (9) is provided with two sets of limiting contacts (12), and the handle (7) is locked on one side of one set of limiting contacts (12).

4. A bidirectional sealing rotary ball valve as described in claim 1, characterized in that: The lock body (14) includes an internal toothed ring (141), two sets of side plates (142) are fixedly connected above the internal toothed ring (141), and a top plate (143) is fixedly connected above the side plates (142). A through hole is opened in the center of the top plate (143). The lock cylinder (16) includes a sleeve (161), and the sleeve (161) has a cylindrical inner cavity. The upper end of the valve stem (6) is inserted into the inner cavity. A insert (164) is provided in the inner cavity and is stuck in the slot (15).

5. A bidirectional sealing rotary ball valve as described in claim 4, characterized in that: The sleeve (161) has teeth (163) evenly distributed around its outer side, and the teeth (163) mesh with the inner tooth ring (141). A lifting rod (162) is fixedly connected to the upper part of the sleeve (161), and the upper end of the lifting rod (162) passes through a through hole opened on the top plate (143).

6. A bidirectional sealing rotary ball valve as described in claim 4, characterized in that: An arc-shaped limiting boss (144) is provided on the inner side of the side plate (142) at a certain height.

7. A bidirectional sealing rotary ball valve as described in claim 5, characterized in that: A spring (18) is fitted on the lifting rod (162), and the two ends of the spring (18) abut against the sleeve (161) and the top plate (143) respectively.

8. A bidirectional sealing rotary ball valve as described in claim 1, characterized in that: A stepped hole is provided in the center of the handle (17); the lifting rod (162) passes through the inner hole of the stepped hole on the handle (17), and a round handle (165) is provided at the upper end of the lifting rod (162), which is locked in the stepped hole on the handle (17).

Images