CN105757271B - A kind of novel flow rate finely tunes gate valve - Google Patents

Abstract

The invention discloses a novel flow fine-tuning gate valve. It includes a valve cover, a first adjustment assembly and a second adjustment assembly; the valve cover is connected to the upper part of the valve body, and the first adjustment assembly and the second adjustment assembly for adjusting the flow rate are installed in the valve body, and the first adjustment assembly is set on the valve cover and the valve The middle part of the body, the second adjustment assembly is set in the first adjustment assembly, a sealing ring is provided between the first adjustment assembly and the valve body, and a sealing ring is provided between the first adjustment assembly and the second adjustment assembly, through the first adjustment The up and down movement of the assembly and the second adjustment assembly adjusts the size of the valve port in the inner cavity of the valve. The present invention is equipped with a fine-tuning device through two adjusting components, which can micro-adjust the fluid flow passing through the valve, and eliminates the disadvantages of large flow changes and inaccurate adjustment of the gate valve during the adjustment process. The device can be well applied in industrial production.

Description

A new type of flow fine-tuning gate valve

technical field

The invention relates to a gate valve, in particular to a novel fine-tuning gate valve, which can perform micro-compensation for fluid flow passing through the valve.

Background technique

Gate valve not only has simple structure and good sealing performance, but also has the advantages of small fluid resistance, small driving torque required for opening and closing, easy operation, and easy to realize rapid opening and closing. It can be used in the ring network pipeline where the medium flows in two directions. In recent years developed rapidly.

Gate valves are widely used, and the fluid flow can be adjusted through the up and down movement of the gate. The variety and quantity of use are still expanding, and they are developing in the direction of high temperature, high pressure, large diameter, high sealing performance and long life. Its reliability and adaptability are important indicators and direction of enterprise development. With the development of the petrochemical industry, especially in oil and natural gas pipelines, refinery cracking units, offshore oil, coal direct liquefied oil units, and nuclear industry, gate valves have been widely used.

At present, most gate valves have a large flow range during the flow adjustment process, especially under the condition of small flow. However, the industrial production industry requires accurate flow values, so continuous adjustment is required to achieve the required flow values. The adaptability of gate valves It is becoming more and more difficult to meet the needs of the market.

Contents of the invention

In order to solve the shortage in the use of gate valves, eliminate the disadvantages of large flow changes in gate valves, and make them more adaptable. The purpose of the present invention is to add a flow fine-adjustment device, and propose a new type of flow fine-adjustment gate valve, which can also achieve the required flow value even in the case of small flow.

The present invention adds a flow fine-tuning device on the basis of the gate valve, which can not only control fluid on-off, but also accurately meet the required flow requirements, which has very important practical significance for improving the adaptability of the valve.

The technical scheme adopted in the present invention is:

The present invention includes a valve body, and also includes a valve cover, a first adjustment assembly and a second adjustment assembly; The components are set in the middle of the bonnet and the valve body, the second adjustment component is set in the first adjustment component, a sealing ring is provided between the first adjustment component and the valve body, and a The sealing ring adjusts the size of the valve port in the inner cavity of the valve through the up and down movement of the first adjusting component and the second adjusting component.

The first adjustment assembly includes a first drive handle, a first valve stem, a first gate and a second gate, the first gate and the second gate are installed oppositely inside the valve body, the first gate and the second gate The connecting end faces of the second gate are sealed. The top end of the first valve stem is fixedly connected with the first driving handle. Between the first gate and the second gate, after turning the first driving handle, the first valve stem moves up and down to drive the first gate and the second gate up and down. A cavity for the second ram to descend.

The second adjustment assembly includes a second drive handle, a second valve stem and a third gate, the second valve stem is installed in the central hole of the first valve stem through screw fit, and the top end of the second valve stem passes through the first valve stem. The valve stem is fixedly connected with the second driving handle at the rear, the bottom end of the second valve stem is connected with the third gate, and the third gate is arranged between the first gate and the second gate.

The structures of the first gate and the second gate are symmetrical, and there are horizontal semicircular grooves near the upper part of the connecting end surface of the first gate and the second gate, and the flange of the first driving handle is embedded in the first gate. In the circular groove formed by the horizontal semicircular groove of the plate and the second gate, the lower part of the connecting end surface of the first gate and the second gate under the horizontal semicircular groove is provided with a rectangular groove, and a fan-shaped through groove is opened in the rectangular groove. The communication direction of the fan-shaped channel is the same as the fluid flow direction in the valve body.

The third gate is installed between the rectangular groove of the first gate and the second gate, the bottom of the second valve stem is provided with a flange, and the upper part of the third gate is provided with a blind hole and a blind hole. The diameter of the circular groove at the inner end is larger than that of the blind hole, so that the flange is embedded in the circular groove of the third flashboard.

The first gate plate, the second gate plate and the inner wall of the valve body are respectively sealed by a first seal ring and a second seal ring, and the first seal ring and the second seal ring are annular seal rings.

The two ends of the third gate are respectively sealed with the first gate and the second gate by the third seal ring and the fourth seal ring, and the third seal ring and the fourth seal ring are both in the shape of a rectangular groove For square sealing rings with the same size, the middle part of the sealing ring is provided with a through groove matching the fan-shaped through grooves of the first gate plate and the second gate plate.

Four bolt holes are evenly distributed on the periphery of the first ram and the second ram, and the first ram and the second ram are tightly connected by bolts, so that the distance between the first ram and the second ram is Connect the end faces to form a seal.

The beneficial effects that the present invention has are:

In addition to the basic functions of the gate valve, the invention also adds the function of fine-tuning the flow rate, improves the functional adaptability of the gate valve, and has an excellent effect on pipelines requiring precise adjustment of the flow rate. And the fluid flow through the valve can be micro-adjusted according to the demand of the flow value.

The invention can meet the needs of fields such as petroleum and chemical industry.

Description of drawings

Fig. 1 is a schematic structural view of the gate valve of the present invention.

Fig. 2 is a schematic structural view of the first gate (second gate) of the present invention.

Fig. 3 is a schematic diagram of the structure of the first valve stem of the present invention.

Fig. 4 is a schematic structural diagram of the third sealing ring (fourth sealing ring) of the present invention.

In the figure: 1, the first driving handle, 2, the first valve stem, 3, the valve cover, 4, the valve body, 5, the first sealing ring, 6, the first gate plate, 7, the third sealing ring, 8, The fourth seal ring, 9, the third gate plate 10, the second gate plate, 11, the second seal ring, 12, the second valve stem, 13, the second driving handle, 14, the cavity.

Detailed ways

The present invention will be further described below in conjunction with drawings and embodiments.

As shown in Figure 1, the present invention includes a valve body 4, a valve cover 3, a first adjustment assembly and a second adjustment assembly; assembly and the second adjustment assembly, the first adjustment assembly is set in the middle of the valve cover 3 and the valve body 4, the second adjustment assembly is set in the first adjustment assembly, a sealing ring is provided between the first adjustment assembly and the valve body 4, A sealing ring is provided between the first adjustment assembly and the second adjustment assembly, and the size of the valve port in the inner cavity of the valve body 4 is adjusted by moving the first adjustment assembly and the second adjustment assembly up and down.

As shown in Figure 1, the first adjustment assembly includes a first driving handle 1, a first valve stem 2, a first gate 6 and a second gate 10, and the first gate 6 and the second gate 10 are installed oppositely on the Inside the valve body 4, the connecting end faces of the first gate 6 and the second gate 10 are sealed, the top of the first valve stem 2 is fixedly connected with the first driving handle 1, and the middle part of the first driving handle 1 is sleeved on the valve cover through thread fit. In 3, a flange is provided at the lower end of the first driving handle 1, and the flange is embedded between the first gate 6 and the second gate 10. After the first driving handle 1 is turned, the first valve stem 2 moves up and down to drive the first gate. The plate 6 and the second gate 10 are raised and lowered, and the center of the bottom of the inner cavity of the valve body 4 is provided with a cavity 14 for the first gate 6 and the second gate 10 to descend;

The second adjustment assembly includes a second drive handle 13, a second valve rod 12 and a third gate 9, the second valve rod 12 is installed in the central hole of the first valve rod 2 through threaded fit, and the second valve rod 12. The top end of the first valve stem 2 is fixedly connected with the second driving handle 13, and the bottom end of the second valve stem 12 is connected with the third gate 9, and the third gate 9 is arranged on the first gate 6 and the second gate. Between the plates 10.

The semicircular grooves of the first gate 6 and the second gate 10 facilitate the installation of the first valve stem 2, so that the first valve stem 2, the first gate 6 and the second gate 10 form a synchronous movement up and down , the third gate can move vertically up and down under the action of the second valve stem.

The structure of the first gate 6 and the second gate 10 are symmetrical, and there are horizontal semicircular grooves near the upper part of the connecting end surface of the first gate 6 and the second gate 10, and the flange of the first drive handle 1 is embedded in the second gate. In the circular groove formed by the horizontal semicircle groove of the first gate plate 6 and the second gate plate 10, the first gate plate 6 and the second gate plate 10 below the horizontal semicircle groove are all provided with a rectangular groove at the lower part of the connecting end face, and in the rectangular groove There is a fan-shaped through groove, and the communication direction of the fan-shaped through groove is the same as the fluid flow direction in the valve body 4 . In specific implementation, the fan angle of the fan-shaped through groove is 20 degrees.

The third flashboard 9 is installed between the rectangular groove of the first flashboard 6 and the second flashboard 10, the third flashboard 9 is an integral plate structure, the bottom end of the second valve stem 12 is provided with a flange, and the second flashboard 9 is provided with a flange. The upper part of the three gates 9 is provided with a blind hole and a circular groove arranged at the inner end of the blind hole. The diameter of the circular groove is greater than the diameter of the blind hole so that the flange is embedded in the circular groove of the third gate 9 .

The circular groove of the third gate 9 facilitates the installation of the second valve stem 12 , so that the second valve stem 12 and the third gate 9 move synchronously up and down.

The first gate plate 6, the second gate plate 10 and the inner wall of the valve body 4 are respectively sealed by the first sealing ring 5 and the second sealing ring 11, and the first gate plate 6 and the inner wall of the valve body 4 are provided with a second sealing ring. A sealing ring 5, a second sealing ring 11 is provided between the second gate plate 10 and the inner wall of the valve body 4, the first sealing ring 5 and the second sealing ring 11 are annular sealing rings.

The two ends of the third gate 9 are respectively sealed with the first gate 6 and the second gate 10 by the third sealing ring 7 and the fourth sealing ring 8 , between the third gate 9 and the first gate 6 A third seal ring 7 is provided, a fourth seal ring 8 is provided between the third gate plate 9 and the second gate plate 10, and both the third seal ring 7 and the fourth seal ring 8 are square with the same shape and size as the rectangular groove. As for the sealing ring, the middle part of the sealing ring is provided with a through groove coincident with the fan-shaped through grooves of the first gate plate 6 and the second gate plate 10 .

Four bolt holes are evenly distributed on the periphery of the first flash plate 6 and the second flash plate 10, and the first flash plate 6 and the second flash plate 10 are tightly connected by bolts, so that the first flash plate 6 and the second flash plate 10 The connecting end faces between form a seal.

The outer wall surface and the inner wall surface of the first valve stem 2 are provided with threads, the outer wall surface of the second valve stem 2 is threaded, the inner wall surface of the through hole at the top of the valve cover 3 is provided with threads, and the outer thread of the first valve stem 2 is connected with the valve cover. 3. The internal thread of the through hole cooperates, and the internal thread of the first valve stem 2 cooperates with the external thread of the second valve stem 2.

Work process and principle of the present invention are:

The invention has the basic function of a gate valve, specifically, under the action of the first driving handle, the first gate and the second gate move vertically up and down to control the size of the fluid flow section. In addition, a flow fine-tuning device is added. The fine-tuning The device is installed between the first gate and the second gate, and the third gate can move up and down vertically under the drive of the second valve rod, so as to control the size of the section of the fluid flowing through the first valve plate and the second valve plate . Therefore, micro adjustments can be made according to the fluid flow.

When the upstream of the gate valve is filled with fluid, the first drive handle turns upwards, and the first gate and the second gate move vertically upward under the action of the first valve stem. At this time, the valve opens and the fluid flows through the first gate and the second gate. When the second ram reaches the downstream of the gate valve, when the flow value at this time is smaller than the required flow value and is lower than the required flow value, the second driving handle slowly turns upwards, and at the same time the second valve stem drives the third ram to move vertically Moving upwards, at this time part of the fluid flows through the tapered horizontal through holes of the first ram and the second ram, so as to achieve the purpose of fine-tuning the flow. When only turning the second driving handle, the adjustment of small flow can also be realized.

The purpose of the invention is to eliminate the disadvantages of large flow range and inaccurate adjustment of the gate valve, and improve the applicability of the gate valve; by adding a fine-tuning device to realize the micro-adjustment of the flow rate, a new fine-tuning gate valve for flow rate is invented. The invention can be adapted to various occasions requiring precise flow control, and has prominent and remarkable social benefits and technical effects.

Claims (6)

1. a kind of novel flow rate finely tunes gate valve, including valve body (4), it is characterised in that：Including valve deck (3), the first adjustment component and Second adjustment component；Valve deck (3) is connected to valve body (4) top, and the first adjustment group for adjusting uninterrupted is equipped in valve body (4) Part and second adjustment component, middle part of the first adjustment assembly set loaded on valve deck (3) and valve body (4), second adjustment assembly set are loaded on In the first adjustment component, sealing ring, the first adjustment component and second adjustment component are equipped between the first adjustment component and valve body (4) Between be equipped with sealing ring, valve of the adjustment in valve body (4) inner cavity is moved up and down by the first adjustment component and second adjustment component Mouth size；

The first adjustment component includes the first driving handle (1), the first valve rod (2), the first flashboard (6) and the second flashboard (10), the first flashboard (6) and the second flashboard (10) are relatively mounted on valve body (4) inside, the first flashboard (6) and the second flashboard (10) it is sealed between connecting end surface, the first valve rod (2) top is fixedly connected with the first driving handle (1), in the middle part of the first valve rod (2) Be sleeved in valve deck (3) by thread fitting, the first driving handle (1) lower end be equipped with flange, flange be embedded into the first flashboard (6) and Between second flashboard (10), the first valve rod (2) oscilaltion drives the first flashboard (6) and the to the first driving handle of rotation (1) afterwards Two flashboards (10) lift, and valve body (4) intracavity bottom center is equipped with for the first flashboard (6) and the second flashboard (10) decline activity Cavity (14)；

The second adjustment component includes the second driving handle (13), the second valve rod (12) and third flashboard (9), the second valve rod (12) it is mounted on by thread fitting in the centre bore of the first valve rod (2), after the second valve rod (12) top is pierced by the first valve rod (2) It is fixedly connected with the second driving handle (13), the second valve rod (12) bottom end is connect with third flashboard (9), and third flashboard (9) is set on Between first flashboard (6) and the second flashboard (10).

2. a kind of novel flow rate fine tuning gate valve according to claim 1, it is characterised in that：First flashboard (6) and The structure of second flashboard (10) is symmetrical, and the adjacent upper part of the first flashboard (6) and the second flashboard (10) connecting end surface is provided with water Flat semicircle groove, the first valve rod (2) flange are embedded into the circle that the first flashboard (6) and the second flashboard (10) horizontal semi-circular groove are formed In connected in star, the first flashboard (6) and the second flashboard (10) connecting end surface lower part below horizontal semi-circular groove are all provided with rectangular channel, square Fan-shaped straight slot is provided in shape slot, the communication direction of fan-shaped straight slot is identical with the fluid circulating direction in valve body (4).

3. a kind of novel flow rate fine tuning gate valve according to claim 1, it is characterised in that：Third flashboard (9) peace Between the rectangular channel of the first flashboard (6) and the second flashboard (10), the second valve rod (12) bottom end is equipped with flange, third flashboard (9) it is equipped with blind hole in top and is set to the circular trough of blind hole inner end, the diameter of circular trough is more than blind hole diameter so that flange is embedding Enter into the circular trough of third flashboard (9).

4. a kind of novel flow rate fine tuning gate valve according to claim 1, it is characterised in that：First flashboard (6) and It is sealed respectively by the first sealing ring (5) and the second sealing ring (11) between the inner wall of second flashboard (10) and valve body (4), first Sealing ring (5) and the second sealing ring (11) are ring type seal.

5. a kind of novel flow rate fine tuning gate valve according to claim 1, it is characterised in that：The third flashboard (9) Both ends are sealed between the first flashboard (6), the second flashboard (10) by third sealing ring (7) and the 4th sealing ring (8) respectively, the Three sealing rings (7) and the 4th sealing ring (8) are the square seal ring identical with rectangular reservoir shape size, are set in the middle part of sealing ring There is the straight slot coincideing with the first flashboard (6) and the fan-shaped straight slot of the second flashboard (10).

6. a kind of novel flow rate fine tuning gate valve according to claim 1, it is characterised in that：First flashboard (6) and The periphery of second flashboard (10) is evenly distributed with four bolts hole, is closely connected by bolt between the first flashboard (6) and the second flashboard (10) It connects so that the connecting end surface between the first flashboard (6) and the second flashboard (10) forms sealing.