阅读说明：本技术 一种可控式液压钳限压阀 (Controllable hydraulic tong pressure limiting valve ) 是由 张海 曹许明 张国栋 王峰 慕彩霞 刘寒梅 赵建娥 奥生慧 张聪 魏升召 秦欢 于 2019-11-22 设计创作，主要内容包括：本发明公开了一种可控式液压钳限压阀,包括阀体、总承、螺杆、旋转手柄、弹簧座、压缩弹簧、球体罩、凡尔球体、球座、液压表；阀体两侧面交错位置分别设有阀体液压输入孔和阀体液压输出孔,阀体的正面置有液压表,总承下端通过螺纹与阀体相连接,总承上部通过螺纹连接着第一固定螺母,第一螺母上端面通过第二螺母固定螺杆,螺杆上端设有旋转手柄,螺杆通过第一螺母穿入总承腔内,螺杆下端置有弹簧座,弹簧座下部置有压缩弹簧和凡尔球,凡尔球在球座内呈自然放置状态,可以对液压起到密封的作用,总承下端口通过螺纹与紧固体相连接,紧固体中间设有贯通的液压入口。本发明的有益效果是：结构合理,使用方便,可广范应用于液压和气压中。(The invention discloses a controllable hydraulic tong pressure limiting valve which comprises a valve body, a main bearing, a screw, a rotating handle, a spring seat, a compression spring, a ball cover, a valve ball, a ball seat and a hydraulic meter, wherein the main bearing is arranged on the valve body; valve body both sides face staggered position is equipped with valve body hydraulic pressure input hole and valve body hydraulic pressure output hole respectively, the hydraulic pressure table has been put in the front of valve body, the total lower extreme is connected with the valve body through the screw thread, first fixation nut is being passed through on the total upper portion of holding, first nut up end is through second nut set screw, the screw rod upper end is equipped with the twist grip, the screw rod penetrates total holding intracavity through first nut, the spring holder has been put to the screw rod lower extreme, compression spring and valve ball have been put to the spring holder lower part, the valve ball is the nature state of placing in the ball seat, can play sealed effect to hydraulic pressure, the port is connected with the fastening body through the screw thread under the total holding, be equipped with the hydraulic pressure entry that. The invention has the beneficial effects that: reasonable structure, convenient use and wide application in hydraulic pressure and air pressure.)

1. A controllable hydraulic tong pressure-limiting valve comprises a valve body (1), a main bearing (2), a screw (5),

The hydraulic pressure meter comprises a rotary handle (7), a spring seat (8), a compression spring (10), a ball cover (11), a valve ball (12), a ball seat (13) and a hydraulic pressure meter (15); the hydraulic control valve is characterized in that valve body hydraulic input holes (101) and valve body hydraulic output holes (102) are respectively arranged at staggered positions on two side surfaces of the valve body (1); the lower end of the main bearing (2) is connected with the valve body (1) through threads, the outer wall of the main bearing (2) connected with the valve body surface is provided with a sealing table body (201) with the outer diameter larger than the main bearing, and the outer wall of the main bearing at the lower part of the sealing table body is provided with a first sealing ring (3); the upper part of the main bearing (2) is connected with a first fixing nut (4) through threads, the lower part of the internal thread of the first nut (4) is matched with the external thread at the upper end of the main bearing (2), the upper part of the internal thread of the first nut is matched with the external thread of the screw rod (5), and the upper end surface of the first nut is fixed with the screw rod (5) through a second nut (6); the upper end of the screw rod (5) is provided with a rotating handle (7); the screw rod (5) penetrates into the cavity of the main bearing (2) through the first nut (4), and the lower end of the screw rod (5) is provided with a spring seat (8); a second sealing ring (9) is arranged on the outer wall of the spring seat (8), and a compression spring (10) is arranged at the lower part of the spring seat; a ball cover (11) is arranged at the lower part of the compression spring (10), and a valve ball (12) is arranged at the lower part of the ball cover; the valve ball (12) is naturally placed in the ball seat (13) and can play a role in sealing hydraulic pressure; the lower port of the assembly (2) is connected with a fastening body (14) through threads; the middle of the fastening body (14) is provided with a through hydraulic inlet.

2. A controllable hydraulic tong pressure limiting valve according to claim 1, characterized in that a main bearing hydraulic input hole (202) is provided on one side of the lower part of the main bearing (2) and is communicated with the valve body hydraulic output hole (102) and the valve body hydraulic input hole (101).

3. The controllable hydraulic tong pressure limiting valve according to claim 1, characterized in that the ball seat (13) is arranged in the inner cavity of the main bearing, the lower end surface of the ball seat is supported by the fastening body (14), and the upper end surface of the ball seat is clamped into a clamping table (203) which is provided with a protrusion and arranged on the inner wall of the main bearing, so that the upper end surface of the fastening body (14) is in sliding surface contact with the lower end surface of the ball seat (13).

4. The controllable hydraulic tong pressure limiting valve according to claim 1, characterized in that the front surface of the valve body (1) is provided with a hydraulic gauge (15) through a valve body connecting hole (103).

Technical Field

The invention belongs to the field of machinery, and particularly relates to a controllable hydraulic tong pressure limiting valve.

Background

The hydraulic transmission system is an important component of modern machinery, power is transmitted to the hydraulic pump by the power system, and the hydraulic pump transmits hydraulic oil to the hydraulic motor through the high-pressure oil pipe, so that the purpose of power transmission is achieved. The hydraulic transmission system has the advantages of high transmission efficiency, no limitation of a mechanical structure, capability of transmitting in any direction and the like. However, since the power is supplied by an engine or a motor, the power is not easy to control, such as oil pipe hydraulic tongs, the power is transferred to a hydraulic motor through a high-pressure oil pipe by a hydraulic pump, and then the hydraulic motor converts the hydraulic power into torque to make up or break out the oil pipe, so that the power of the hydraulic tongs is too large often to damage the oil pipe. If the oil pipe tongs are used, the oil rod is screwed up or off, because the oil rod is different from the oil pipe, the thread of the oil pipe needs to be screwed up, the tightness of the thread needs to be ensured, the thread of the oil rod only has a connecting effect, the screwing-up is not needed, and the screwing-up is too tight

But the oil rod is damaged, so that the service life of the oil rod is shortened, and the oil rod is difficult to be disassembled when the oil rod is disassembled next time. Therefore, in order to screw the oil rod by using the hydraulic clamp, the development of the pressure limiting valve with high sensitivity and adjustable property is the only option.

Disclosure of Invention

The invention aims to provide a controllable hydraulic clamp pressure limiting valve aiming at the defects and shortcomings of the prior art.

In order to achieve the purpose, the invention adopts the technical scheme that: a controllable hydraulic tong pressure limiting valve comprises a valve body, a main bearing, a screw, a rotating handle, a spring seat, a compression spring, a ball cover, a valve ball, a ball seat and a hydraulic gauge; the staggered positions of the two side surfaces of the valve body are respectively provided with a valve body hydraulic input hole and a valve body hydraulic output hole; the lower end of the main bearing is connected with the valve body through threads, the outer wall of the main bearing connected with the valve body surface is provided with a sealing table body with the outer diameter larger than the outer diameter of the main bearing, and the outer wall of the main bearing at the lower part of the sealing table body is provided with a first sealing ring; the upper part of the main bearing is connected with a first fixing nut through threads, the lower part of the internal thread of the first nut is matched with the external thread at the upper end of the main bearing, the upper part of the internal thread of the first nut is matched with the external thread of the screw, and the upper end surface of the first nut is fixed with the screw through a second nut; the upper end of the screw rod is provided with a rotating handle; the screw rod penetrates into the main bearing cavity through a first nut, a spring seat is arranged at the lower end of the screw rod, a second sealing ring is arranged on the outer wall of the spring seat, a compression spring is arranged at the lower part of the spring seat, a ball cover is arranged at the lower part of the compression spring, and a valve ball is arranged at the lower part of the ball cover; the valve ball is placed in the ball seat in a natural placing state, and can play a sealing role in hydraulic pressure; the general lower port is connected with the fastening body through threads; and a through hydraulic inlet is arranged in the middle of the fastening body.

Furthermore, a main bearing hydraulic input hole arranged on one side of the lower part of the main bearing is communicated with the valve body hydraulic output hole and the valve body hydraulic input hole.

Furthermore, after the ball seat is arranged in the inner cavity of the main bearing, the lower end surface of the ball seat is supported by the fastening body, and the upper end surface of the ball seat is clamped into a clamping table which is arranged on the inner wall of the main bearing and protrudes out, so that the upper end surface of the fastening body is in sliding surface contact with the lower end surface of the ball seat.

Furthermore, a hydraulic gauge is arranged on the front face of the valve body through a valve body connecting hole.

The invention has the beneficial effects that: reasonable structure, convenient use and high sensitivity, and can be widely applied to hydraulic pressure and air pressure.

Drawings

Fig. 1 is a sectional view of the overall structure of the present invention.

Figure 2 is a partial cross-sectional view of the inventive assembly. In fig. 1: 1. a valve body; 101. a valve body hydraulic input aperture; 102. a valve body hydraulic output hole; 103. a hydraulic gauge connecting hole; 2. carrying out assembly; 201. a sealing table body; 202. a collective hydraulic input aperture; 203. clamping a platform; 3. a first seal ring; 4. a first nut; 5. a screw; 6. a second nut; 7. rotating the handle; 8. a spring seat; 9. a second seal ring; 10. a compression spring; 11. a spherical cover; 12. a Versailles ball; 13. a ball seat; 14. a fastening body; 1401. a hydraulic inlet; 15. and a hydraulic gauge.

Detailed Description

For the understanding of those skilled in the art, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The controllable hydraulic tong pressure limiting valve shown in fig. 1-2 comprises a valve body 1, a main bearing 2, a screw 5, an adjusting handle 7, a spring seat 8, a compression spring 10, a ball cover 11, a valve ball 12, a ball seat 13 and a hydraulic gauge 15; valve body hydraulic input holes 101 and valve body hydraulic output holes 102 are respectively arranged at the staggered positions of the two side surfaces of the valve body 1; the lower end of the main bearing 2 is connected with the valve body 1 through threads, the outer wall of the main bearing 2 connected with the surface of the valve body 1 is provided with a sealing table body 201 with the outer diameter larger than the main bearing, and the outer wall of the main bearing at the lower part of the sealing table body is provided with a first sealing ring 3; the upper part of the main bearing 2 is connected with a first fixing nut 4 through threads, the lower part of the internal thread of the first nut 4 is matched with the external thread at the upper end of the main bearing 2, the upper part of the internal thread of the first nut is matched with the external thread of a screw rod 5, and the upper end face of the first nut is fixed with the screw rod 5 through a second nut 6; the upper end of the screw rod 5 is provided with a rotating handle 7, the screw rod 5 penetrates into the cavity of the main bearing 2 through a first nut 4, the lower end of the screw rod 5 is provided with a spring seat 8, the outer wall of the spring seat 8 is provided with a second sealing ring 9, the lower part of the spring seat is provided with a compression spring 10, the lower part of the compression spring 10 is provided with a ball cover 11, the lower part of the ball cover is provided with a valve ball 12, and the valve ball 12 is naturally placed in a ball seat 13 and can play a sealing role in hydraulic pressure; the lower port of the assembly 2 is connected to a fastening body 14 by a screw, and a hydraulic inlet 1401 is provided through the fastening body 14.

In the preferred embodiment, a main hydraulic inlet hole 202 formed in the lower side of the main bearing 2 communicates with the valve body hydraulic outlet hole 102 and the valve body hydraulic inlet hole 101.

In a preferred embodiment, after the ball seat 13 is disposed in the inner cavity of the main bearing, the lower end surface is supported by the fastening body 14, and the upper end surface is clamped into a clamping table 203 provided with a protrusion on the inner wall of the main bearing, so that the upper end surface of the fastening body 14 is in sliding surface contact with the lower end surface of the ball seat 13.

In a preferred embodiment, the front surface of the valve body 1 is provided with a hydraulic gauge 15 through a valve body connecting hole 103.

When in use, the hydraulic clamp is arranged at the tail part of the hydraulic clamp, and the valve body hydraulic input hole 101 and the valve body hydraulic output hole 102 are respectively connected with the hydraulic input hole and the hydraulic output hole of the motor. When the oil rod is unscrewed, the second nut 6 is screwed to the uppermost position by a wrench, the rotating handle 7 is screwed clockwise, the compression spring 10 is completely compressed, the second nut fixing screw 5 is screwed by the wrench, and the valve ball 12 is completely attached to the ball seat 13 and bears the maximum elastic force of the compression spring; the hydraulic oil is transmitted to the motor through the high-pressure oil pipe, and the oil rod is possibly screwed tightly when being unscrewed, so that the hydraulic pressure needs to be amplified as much as possible, and the hydraulic clamp can release the maximum torque to unscrew the oil rod; when the oil rod needs to be buckled, the second nut 6 is firstly unscrewed by a wrench, the rotating handle 7 is adjusted to a proper position, and then the second nut 6 is fixed. The hydraulic pliers are manually operated by workers to control the point extremely difficultly as long as the hydraulic oil passes through the hydraulic pliers, when the screw thread of the oil rod is screwed, the torque of the hydraulic pliers is blocked, the hydraulic oil can avoid a hydraulic motor, and the powerful hydraulic oil can jack the valve ball 12, the ball cover 11 and the compression spring 10, so that the hydraulic oil is output from the valve body hydraulic output hole 102 through the main bearing hydraulic input hole 202, and the pressure of the hydraulic oil is effectively controlled.

The hydraulic pressure and air pressure regulating device is simple in structure, low in cost, free of power supply, fine and accurate in manual regulation and capable of being widely applied to hydraulic pressure and air pressure. The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby; all simple equivalent changes and modifications made according to the claims and the content of the creation specification of the present invention should still fall within the scope covered by the present patent.