Overflow valve hold-down device

Abstract

The utility model discloses a kind of overflow valve buckling devices, including upper slide, lower slide and reset component, the upper slide and the lower slide are connected with each other by the reset component, the upper slide can be moved towards or away from the lower slide, wherein, the cross-sectional shape of upper slide and lower slide is all defined by circular arc, the central angle α of upper slide and lower slide is all 210 °. The spinning device of the application can ensure that the spring force of overflow valve is within a certain range when buckling, i. e. the pressure at factory is within the requirement range of customer (±10bar).

Description

Technical Field

[0001] This utility model relates to the field of crimping device technology, and in particular to an overflow valve crimping device. Background Technology

[0002] Existing DRV series crimp-type relief valves, after adjusting the spring force, crimp the spring seat to fix the factory pressure. These types of relief valves are widely used in various threaded cartridge valves. These crimp-type relief valves face the risk of unstable spring force during crimping (the factory pressure often deviates significantly, P*A=K*△X). Therefore, this application designs a quick, convenient, and accurate crimping device that can ensure the spring force of the relief valve is within a certain range during crimping, i.e., the factory pressure is within the customer's required range (±10 bar). Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an overflow valve crimping device.

[0004] The purpose of this utility model is achieved through the following technical solution: An overflow valve pressing device includes an upper slide, a lower slide, and a reset assembly. The upper slide and the lower slide are connected to each other through the reset assembly. The upper slide can move toward or away from the lower slide. The cross-sectional shape of the upper slide and the lower slide is defined by an arc shape, and the central angle α of the upper slide and the lower slide is 210°.

[0005] Preferably, a first base plate is provided on the upper slide rail, a second base plate is provided on the lower slide rail, and the upper slide rail is nested within the lower slide rail.

[0006] Preferably, the second base plate is provided with a fixing groove, a fixing seat is provided in the fixing groove, a fixing sleeve is nested in the fixing seat, and an overflow valve can be nested in the fixing sleeve.

[0007] Preferably, the overflow valve clamping device further includes a sensor pressure measuring head disposed above the fixed base.

[0008] Preferably, the reset assembly includes several guide rods and several reset springs, with a reset spring sleeved on each guide rod, wherein the two ends of the guide rod are respectively connected to the upper slide rail and the lower slide rail.

[0009] This utility model has the following advantages: Because the factory pressure of a crimped relief valve is within the customer's specified value (±10 bar), and many factors affect the factory pressure after crimping, such as manufacturing errors in spring stiffness and spring seat misalignment during crimping leading to excessive or insufficient spring force, this application designs a convenient and quick spinning device. This device prevents spring misalignment at the guide position, controls the spring force within the linear region, and uses a sensor to control the spinning force value. Regardless of spring stiffness deviation, the factory pressure of the relief valve can be controlled (since the relief valve opening area is determined, only the spinning spring force needs to be controlled). This application automates the device through a control system. The factory pressure qualification rate of the spun relief valve after crimping is 99%, and its practicality and reliability have been verified in production. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the mounting bracket assembly; Figure 3 This is a schematic diagram of the cross-sectional shapes of the upper and lower tracks; In the figure, 1-upper slide rail, 2-sensor pressure measuring head, 3-lower slide rail, 4-fixed seat assembly, 5-overflow valve, 6-reset assembly, 7-fixed sleeve, 8-fixed seat, 9-internal hexagon, 10-first base plate, 11-second base plate, 6a-guide rod, 6b-reset spring. Detailed Implementation

[0011] The present invention will be further described below with reference to the accompanying drawings. The scope of protection of the present invention is not limited to the following description: like Figures 1 to 3 As shown, this application provides an overflow valve clamping device, including an upper slide rail 1, a lower slide rail 3, and a reset assembly 6. The upper slide rail 1 and the lower slide rail 3 are connected to each other via the reset assembly 6. The upper slide rail 1 can move toward or away from the lower slide rail 3. The cross-sectional shape of both the upper slide rail 1 and the lower slide rail 3 is defined by an arc shape, and the central angle α of both the upper slide rail 1 and the lower slide rail 3 is 210°. Specifically, a first base plate 10 is provided on the upper slide rail 1, and a second base plate 11 is provided on the lower slide rail 3. The upper slide rail 1 is nested in the lower slide rail 3. The fixing seat assembly 4 consists of a fixing seat and a fixing sleeve, and is used to place the overflow valve. A fixing groove 12 is provided on the second base plate 11, and a fixing seat 8 is provided in the fixing groove 12. A fixing sleeve 7 is nested in the fixing seat 8, and the overflow valve 5 can be nested in the fixing sleeve 7. The overflow valve clamping device also includes a sensor pressure measuring head 2 disposed above the fixing seat 8. The reset assembly 6 includes several guide rods 6a and several reset springs 6b. Each guide rod 6a is fitted with a reset spring 6b. The two ends of the guide rod 6a are respectively connected to the upper slide rail 1 and the lower slide rail 3.

[0012] The working principle of this application is as follows: The fixed sleeve 7 is interference-fitted to the fixed seat 8, and the fixed sleeve and the front end of the relief valve sleeve are fixed with a clearance fit. The purpose is to ensure that the relief valve is positioned correctly. The large clearance fit between the fixed sleeve and the inner hexagonal 9 of the relief valve core facilitates the rotational movement of the valve core during spinning. This device can be used with a control system to achieve automated spinning, while also meeting manual spinning requirements. The upper and lower slides are composed of two mutually clearance-fitted large semicircles (the tail end is at a 15° angle to the semicircle). The purpose is to guide the slides so that the sensor pressure head 2 and the spring seat of the relief valve being spun remain concentric during spinning. This ensures a uniform force distribution, meaning the force value remains stable after spinning, preventing spring misalignment and unstable factory pressure of the refilled relief valve. Furthermore, the large semicircular structure serves both guiding and facilitates easy placement of the relief valve.

[0013] The reset component 6 in the spinning device achieves soft fixation with the upper and lower fixing rods through four springs. The purpose is to assist in overall guidance in addition to the guidance of the upper and lower slide rails. The soft fixation can adaptively meet the concentricity of the upper and lower slide rails through the springs, and automatically reset to a suitable height after spinning to facilitate the spinning of the next overflow valve.

[0014] The spinning technology described in this application is mainly used for fixing the force value of snap-fit ​​springs in a broad sense, and can be automated in conjunction with a control system. The roughness Ra0.4 and Rp3.2 of the upper and lower guide rails must be controlled during manufacturing; the center positions of the upper and lower guide rails must be identical.

[0015] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A relief valve crimping device, characterized in that, It includes an upper slide (1), a lower slide (3) and a reset assembly (6). The upper slide (1) and the lower slide (3) are connected to each other via the reset assembly (6). The upper slide (1) can move toward or away from the lower slide (3). The cross-sectional shape of the upper slide (1) and the lower slide (3) is defined by an arc. The central angle α of the upper slide (1) and the lower slide (3) is 210°.

2. The overflow valve crimping device according to claim 1, characterized in that, The upper slide (1) is provided with a first base plate (10), and the lower slide (3) is provided with a second base plate (11). The upper slide (1) is nested in the lower slide (3).

3. The overflow valve clamping device according to claim 2, characterized in that, The second base plate (11) is provided with a fixing groove (12), a fixing seat (8) is provided in the fixing groove (12), a fixing sleeve (7) is nested in the fixing seat (8), and an overflow valve (5) can be nested in the fixing sleeve (7).

4. The overflow valve clamping device according to claim 3, characterized in that, The overflow valve clamping device also includes a sensor pressure head (2) disposed above the fixed base (8).

5. The overflow valve crimping device according to claim 1, characterized in that, The reset assembly (6) includes several guide rods (6a) and several reset springs (6b). Each guide rod (6a) is fitted with a reset spring (6b). The two ends of the guide rod (6a) are respectively connected to the upper slide (1) and the lower slide (3).

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