Grinding device for valve seat and valve plate of disc valve

Abstract

The utility model belongs to the technical field of valve bodies, and particularly relates to a disc valve seat and valve plate grinding device which comprises a machine frame, a workbench used for clamping a valve seat is installed at the bottom of the machine frame, a rotary driving mechanism is installed at the top of the machine frame, and the output end of the rotary driving mechanism is connected with a connecting rod. The bottom of the connecting rod is connected with a transverse adjusting rod capable of transversely moving, the end of the transverse adjusting rod is connected with a longitudinal adjusting rod capable of longitudinally moving, the bottom of the longitudinal adjusting rod is elastically connected with a middle rod, and the bottom of the middle rod is connected with a valve plate through a universal joint. The eccentric distance can be adjusted through the transverse adjusting rod and the longitudinal adjusting rod so as to meet grinding workpieces of different sizes, elastic pre-tightening force can be applied to the valve seat all the time through the compression spring, the valve plate can be attached to the valve seat all the time in the whole process, the valve plate can be self-aligned through the universal joint, and the grinding efficiency is improved. Therefore, a better grinding effect is achieved, and the leakage grade requirement is met.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve bodies, and in particular relates to a grinding device for a valve seat and a valve plate of a disc valve. Background Art

[0002] With the diversity of control valve application conditions, higher requirements are placed on the wear resistance and erosion resistance of valves. In order to prevent valve clogging in the working conditions where abrasive materials exist, the double flat disc valve can meet the normal operation of continuous long periods under harsh working conditions. The double flat disc valve adopts a hard seal structure design. The leakage level can reach ANSI / FCI 70-2Class VI. The valve plate sealing surface fits tightly with the valve seat with the help of spring elastic force, so that the valve disc is closely attached to the valve seat sealing surface for a long time, providing uniform output torque to the valve plates on both sides, and allowing the valve plate to have a certain displacement in the vertical direction of the sealing surface, which is conducive to compensating for the deformation of the valve components caused by thermal expansion and contraction, and ensuring bidirectional sealing.

[0003] Because it is a metal seal, the leakage level needs to reach ANSI / FCI 70-2 Class VI, so the valve plate and valve seat sealing pair must be ground to improve the surface roughness. The existing grinding devices all grind through the rigid contact between the valve plate and the valve seat, and the grinding effect is not good. Utility Model Content

[0004] The technical problem to be solved by the utility model is: in order to solve the problem that the existing grinding devices in the prior art all perform grinding through rigid contact between the valve plate and the valve seat, resulting in poor grinding effect, a disc valve seat and valve plate grinding device is now provided.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a disc valve seat and valve plate grinding device, comprising a frame, a workbench for clamping the valve seat is installed at the bottom of the frame, a rotary drive mechanism is installed at the top of the frame, the output end of the rotary drive mechanism is connected to a connecting rod, the bottom of the connecting rod is connected to a transverse adjustment rod that can move laterally, the end of the transverse adjustment rod is connected to a longitudinal adjustment rod that can move longitudinally, the bottom of the longitudinal adjustment rod is elastically connected to an intermediate rod, and the bottom of the intermediate rod is connected to the valve plate through a universal joint.

[0006] Furthermore, a slot for inserting the middle rod is provided at the bottom of the longitudinal adjustment rod, and an elastic element is provided between the longitudinal adjustment rod and the middle rod.

[0007] Furthermore, the lower end of the longitudinal adjustment rod contracts to form a first contraction section with a first installation step between the two, the slot is located inside the first contraction section, the upper end of the intermediate rod contracts to form a second contraction section with a second installation step between the two, one end of the elastic element is connected to the first installation step, and the other end is connected to the second installation step.

[0008] Furthermore, the upper end of the second contraction section contracts to form an insertion section for inserting into the slot, and a limiting step abutting against the first contraction section is provided between the two.

[0009] Furthermore, the connecting rod is a T-shaped structure that is larger at the top and smaller at the bottom to form a first supporting step between the two. A through slot is provided on the top of the frame for the connecting rod to pass through. The through slot is larger at the top and smaller at the bottom to form a second supporting step. A thrust bearing is provided between the first supporting step and the second supporting step.

[0010] Furthermore, the connecting rod is threadedly connected to the lateral adjustment rod, and locking nuts are installed at locations of the lateral adjustment rod on both sides of the connecting rod.

[0011] Furthermore, the transverse adjustment rod is threadedly connected to the longitudinal adjustment rod, and locking nuts are installed at the locations of the longitudinal adjustment rod on both sides of the transverse adjustment rod.

[0012] The beneficial effects of the utility model are as follows: the utility model utilizes a transverse adjustment rod and a longitudinal adjustment rod to adjust the eccentric distance to meet the needs of grinding workpieces of different sizes, and utilizes a compression spring to always apply an elastic pre-tightening force to the valve seat, so that the valve plate is always in contact with the valve seat during the entire process, and the setting of the universal joint allows the valve plate to be self-aligned, thereby achieving a better grinding effect to meet the leakage level requirements.

[0013] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0017] In the figure:

[0018] 1. Frame; 101. Through slot; 1011. Second supporting step; 102. Bottom plate; 103. Top plate; 104. Column; 2. Workbench; 3. Rotary drive mechanism; 4. Connecting rod; 401. First supporting step; 5. Lateral adjustment rod; 6. Longitudinal adjustment rod; 601. Slot; 602. First contraction section; 603. First installation step; 7. Intermediate rod; 701. Universal joint; 702. Second contraction section; 703. Second installation step; 704. Plug-in section; 705. Limiting step; 8. Valve plate; 9. Valve seat; 10. Elastic element; 11. Thrust bearing; 12. Locking nut. DETAILED DESCRIPTION

[0019] The utility model is now described in further detail in conjunction with the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, so they only show the components related to the utility model, and the directions and references (for example, up, down, left, right, etc.) can only be used to help describe the features in the drawings. Therefore, the following specific embodiments are not adopted in a restrictive sense, and the scope of the subject matter claimed is limited only by the attached claims and their equivalents.

[0020] like Figure 1 and Figure 2 As shown, a disc valve seat and valve plate grinding device comprises a frame 1, a workbench 2 for clamping a valve seat 9 is installed at the bottom of the frame 1, the workbench 2 comprises a bottom plate 102, a top plate 103 and a column 104 located therebetween, and the column 104 is threadedly connected to the two and locked by a locking nut 12, a rotation drive mechanism 3 is installed on the top plate 103, the rotation drive mechanism 3 is a variable frequency motor, the output end of the rotation drive mechanism 3 is connected to a connecting rod 4, the two are keyed, the bottom of the connecting rod 4 is connected to a lateral adjustment rod 5 that can be moved laterally, the lateral adjustment rod 5 is A longitudinal adjusting rod 6 which can move longitudinally is connected to the end of the adjusting rod 5, and an intermediate rod 7 is elastically connected to the bottom of the longitudinal adjusting rod 6, and a valve plate 8 is connected to the bottom of the intermediate rod 7 through a universal joint 701; since there is a certain eccentric distance between the mounting hole of the valve body and the valve seat 9 and the center of the valve body, and since the eccentric distance is inconsistent depending on the caliber, pressure and brand of the disc valve, the lateral and longitudinal positions of the valve plate 8 can be adjusted respectively by the lateral adjusting rod 5 and the longitudinal adjusting rod 6, and the eccentric distance is adjusted so that the valve plate 8 and the valve seat 9 can be in contact during the full rotation stroke, thereby improving the versatility of the device.

[0021] First, the valve seat 9 is installed on the workbench 2. According to the size of the valve seat 9, the lateral position of the valve plate 8 is adjusted by the lateral adjustment rod 5, and the longitudinal position of the valve plate 8 is adjusted by the longitudinal adjustment rod 6. Then, the motor is started. The motor drives the valve plate 8 to rotate through the connecting rod 4 to grind the valve seat 9. During the grinding process, the longitudinal adjustment rod 6 always applies an elastic pre-tightening force to the valve seat 9 through the elastically arranged intermediate rod 7. Through elastic compensation, the valve plate 8 is always in contact with the valve seat 9 during the whole process. The setting of the universal joint 701 can make the valve plate 8 self-aligning, thereby achieving a better grinding effect.

[0022] In some examples, a slot 601 is provided at the bottom of the longitudinal adjustment rod 6 for the intermediate rod 7 to be inserted into, and the two are movably connected. The intermediate rod 7 can slide up and down along the slot 601, and an elastic element 10 is provided between the longitudinal adjustment rod 6 and the intermediate rod 7. The elastic element 10 is a compression spring. The intermediate rod 7 can move up and down under the action of the compression spring, thereby driving the valve plate 8 to fit with the valve seat 9. The cooperation between the intermediate rod 7 and the slot 601 can guide the movement of the intermediate rod 7.

[0023] In some examples, the lower end of the longitudinal adjustment rod 6 contracts to form a first contraction section 602 with a first installation step 603 therebetween, the slot 601 is located inside the first contraction section 602, the upper end of the intermediate rod 7 contracts to form a second contraction section 702 with a second installation step 703 therebetween, the elastic element 10 is sleeved on the first contraction section 602 and the second contraction section 702, and one end thereof is connected to the first installation step 603, and the other end is connected to the second installation step 703.

[0024] In some examples, the upper end of the second contraction section 702 contracts to form an insertion section 704 for inserting into the slot 601, and a limiting step 705 abutting against the first contraction section 602 is provided therebetween, and the limiting step 705 can limit the maximum upward displacement of the intermediate rod 7.

[0025] In some examples, the connecting rod 4 is a T-shaped structure that is larger at the top and smaller at the bottom to form a first supporting step 401 therebetween. A through slot 101 is provided on the top of the frame 1 for the connecting rod 4 to pass through. The through slot 101 is larger at the top and smaller at the bottom to form a second supporting step 1011. The first supporting step 401 abuts against the second supporting step 1011 to support the connecting rod 4, and a thrust bearing 11 is provided between the first supporting step 401 and the second supporting step 1011. A thrust bearing 11 is also provided between the connecting rod 4 and a mounting seat for mounting a motor. During the grinding process of the valve plate 8 and the valve seat 9, the two are tightly fitted and subjected to interaction force. The valve plate 8 is subjected to an upward force, thereby applying an axial force to the connecting rod 4. By installing the thrust bearing 11, the connecting rod 4 can rotate smoothly.

[0026] In some examples, the connecting rod 4 is threadedly connected to the lateral adjustment rod 5, and locking nuts 12 are installed on both sides of the lateral adjustment rod 5. The lateral distance of the valve plate 8 can be adjusted by rotating the lateral adjustment rod 5, and the position can be fixed by locking the locking nuts 12.

[0027] In some examples, the transverse adjustment rod 5 is threadedly connected to the longitudinal adjustment rod 6, and locking nuts 12 are installed on the longitudinal adjustment rod 6 on both sides of the transverse adjustment rod 5. The longitudinal distance of the valve plate 8 can be adjusted by rotating the longitudinal adjustment rod 6, and the position can be fixed by locking the locking nuts 12.

[0028] Working principle:

[0029] First, install the valve seat 9 on the workbench 2. According to the size of the valve seat 9, adjust the lateral position of the valve plate 8 through the lateral adjusting rod 5 and lock it through the locking nut 12, and adjust the longitudinal position of the valve plate 8 through the longitudinal adjusting rod 6 and lock it through the locking nut 12. Then start the motor, and the motor drives the valve plate 8 to rotate through the connecting rod 4 to grind the valve seat 9. During the grinding process, the longitudinal adjusting rod 6 always applies an elastic pre-tightening force to the valve seat 9 through the compression spring. Through elastic compensation, the valve plate 8 is always in contact with the valve seat 9 during the whole process. The setting of the universal joint 701 can make the valve plate 8 self-aligning, so as to achieve a better grinding effect to meet the leakage level requirements.

[0030] The above-mentioned ideal embodiments of the utility model are inspirations. Through the above-mentioned description, relevant staff can make various changes and modifications without deviating from the technical concept of the utility model. The technical scope of the utility model is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A disc valve seat and valve plate grinding device, characterized in that: The invention comprises a frame (1), a workbench (2) for clamping a valve seat (9) is installed at the bottom of the frame (1), a rotary drive mechanism (3) is installed at the top of the frame (1), the output end of the rotary drive mechanism (3) is connected to a connecting rod (4), the bottom of the connecting rod (4) is connected to a lateral adjustment rod (5) that can move laterally, the end of the lateral adjustment rod (5) is connected to a longitudinal adjustment rod (6) that can move longitudinally, the bottom of the longitudinal adjustment rod (6) is elastically connected to an intermediate rod (7), and the bottom of the intermediate rod (7) is connected to a valve plate (8) via a universal joint (701).

2. A disc valve seat and valve plate grinding device according to claim 1, characterized in that: A slot (601) for inserting the intermediate rod (7) is provided at the bottom of the longitudinal adjustment rod (6), and an elastic element (10) is provided between the longitudinal adjustment rod (6) and the intermediate rod (7).

3. A disc valve seat and valve plate grinding device according to claim 2, characterized in that: The lower end of the longitudinal adjustment rod (6) is contracted to form a first contraction section (602) with a first mounting step (603) therebetween; the slot (601) is located inside the first contraction section (602); the upper end of the intermediate rod (7) is contracted to form a second contraction section (702) with a second mounting step (703) therebetween; one end of the elastic element (10) is connected to the first mounting step (603) and the other end is connected to the second mounting step (703).

4. A disc valve seat and valve plate grinding device according to claim 3, characterized in that: The upper end of the second contraction section (702) contracts to form an insertion section (704) for inserting into the slot (601), and a limiting step (705) abutting against the first contraction section (602) is provided between the two.

5. The disc valve seat and valve plate grinding device according to claim 1, characterized in that: The connecting rod (4) is a T-shaped structure with a larger upper portion and a smaller lower portion, so as to form a first supporting step (401) therebetween. A through slot (101) for the connecting rod (4) to pass through is provided on the top of the frame (1). The through slot (101) is larger at the upper portion and smaller at the lower portion to form a second supporting step (1011). A thrust bearing (11) is provided between the first supporting step (401) and the second supporting step (1011).

6. The disc valve seat and valve plate grinding device according to claim 1, characterized in that: The connecting rod (4) is threadedly connected to the lateral adjustment rod (5), and locking nuts (12) are installed at the locations of the lateral adjustment rod (5) located on both sides of the connecting rod (4).

7. The disc valve seat and valve plate grinding device according to claim 1, characterized in that: The transverse adjustment rod (5) is threadedly connected to the longitudinal adjustment rod (6), and locking nuts (12) are installed on both sides of the longitudinal adjustment rod (6) located on the transverse adjustment rod (5).

Images