Sampling valve

Abstract

The utility model discloses a sampling valve which comprises a valve body, a handle used for opening and closing is installed on the valve body, a limiting assembly is rotatably installed on the valve body and comprises a limiting arm and an elastic piece, the limiting arm is rotatably arranged on the outer wall of the valve body, the elastic piece is installed between the limiting arm and the valve body, and the limiting arm is rotatably arranged on the outer wall of the valve body. One end of the elastic piece is installed on the valve body, the other end of the elastic piece extends and abuts against the limiting arm, so that one end of the limiting arm is arranged towards one side of the handle in an inclined state, and the inclined end of the limiting arm is clamped on the handle in a limiting mode. The problem that when the check valve is maintained in the later period, disassembly and assembly are not convenient is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a sampling valve. Background Art

[0002] A sampling valve is a valve used to obtain medium samples in pipelines or equipment. It is used in situations where chemical analysis of medium samples is required frequently. In existing technologies, the sampling valve controls the entry of medium into the sampling chamber inside the valve body by opening and closing the handle, and finally uses a sampler to take samples. When in use, the above structure is prone to the handle loosening or accidental touch causing the valve to open, which affects the service life of the sampling valve. Utility Model Content

[0003] In view of the above problems, the present invention provides a sampling valve, which solves the problem of opening caused by a loose handle or accidental touch.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sampling valve, comprising a valve body, a handle for opening and closing being installed on the valve body, a limit assembly being rotatably installed on the valve body, the limit assembly comprising a limit arm and an elastic member, the limit arm being rotatably arranged on the outer wall of the valve body, the elastic member being installed between the limit arm and the valve body, one end of the elastic member being installed on the valve body, and the other end extending and pressing against the limit arm, so that one end of the limit arm is arranged in an inclined state toward the side of the handle, and the inclined end of the limit arm is limit-clamped on the handle.

[0005] By adopting the above technical solution, when the handle is in the tightened and closed state, the limit arm can be clamped on the handle through the ejection force of the elastic part, thereby realizing axial locking of the handle. When the handle needs to be opened for sampling, the limit arm is pressed on one end of the elastic part to separate the limit arm from the handle, or the limit handle is pulled up and rotated toward the side of the elastic part, which can also release the axial locking of the handle, thereby solving the problem of the handle being opened due to looseness or accidental touch.

[0006] The utility model is further configured as follows: a mounting groove is provided on the valve body, a hinge seat is provided in the mounting groove, a rotating rod is provided through the hinge seat, and a hinge hole adapted to the rotating rod is provided on the limiting arm.

[0007] By adopting the above technical solution, the limiting arm realizes the rotation operation, and the positioning rotation of the limiting arm is realized by the contraction operation of the elastic member.

[0008] The utility model is further configured such that a positioning groove is provided on one side of the hinge seat on the installation groove, one end of the elastic member is installed in the positioning groove, and the other end is tightly pressed against the limiting arm.

[0009] By adopting the above technical solution, the elastic member can be positioned and installed, thereby preventing the elastic member from falling off during use, and having a good positioning effect.

[0010] The present invention is further configured such that a positioning boss is provided on the side of the limiting arm facing the elastic member, the positioning boss extends toward the side of the elastic member, and one end of the elastic member is sleeved on the positioning boss.

[0011] By adopting the above technical solution, the limiting arm can stably transmit the force released by the elastic member through the positioning boss, and at the same time realize the double-end positioning of the elastic member with the positioning groove.

[0012] The present invention is further configured such that a clamping portion is provided on the limiting arm, the clamping portion is connected to the limiting arm in an L-shaped configuration, and a limiting through hole for clamping the clamping portion is provided on the valve body.

[0013] By adopting the above technical solution, the L-shaped setting can realize axial locking of the handle, and the clamping part and the limiting through hole are used to realize the limiting clamping to prevent the handle from loosening.

[0014] The present invention is further configured such that two clamping legs are symmetrically provided on the clamping portion, a positioning flange is provided on the side of the clamping legs facing the limiting through hole, and a fixing groove adapted to the positioning flange is provided on the limiting through hole.

[0015] By adopting the above technical solution, the clamping legs are used to provide more stable support and limiting effects, effectively preventing the limiting arm from loosening during use.

[0016] The present invention is further configured such that the opening width of the limiting through hole is smaller than the plug-in width of the clamping portion.

[0017] By adopting the above technical solution, the two clamping legs are contracted towards each other during insertion, and the contraction pressure is released after passing through the opening and the legs are clamped on the fixing groove.

[0018] The present invention is further configured such that a gap is provided between the two clamping legs.

[0019] By adopting the above technical solution, the purpose of setting the gap is that the two clamping legs can be retracted inward during the installation process and pass through the opening of the limiting through hole.

[0020] The present invention is further configured such that a cambered surface is provided at the connection between the limiting arm and the clamping portion.

[0021] By adopting the above technical solution, structural interference with the valve body can be effectively avoided, and a better yielding effect can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a partial structural diagram of the handle, valve body and limit assembly of the utility model.

[0024] In the figure; 1. valve body; 2. handle; 3. limit assembly; 4. limit arm; 5. elastic member; 8. mounting slot; 9. hinge seat; 10. rotating rod; 11. hinge hole; 12. positioning slot; 13. positioning boss; 14. clamping part; 15. limit through hole; 16. clamping foot; 17. positioning flange; 18. fixing groove; 19. yielding arc surface. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example: As shown in the attached Figure 1 and attached Figure 2 The sampling valve shown in the figure includes a valve body 1, on which a handle 2 for opening and closing is installed, and a limit assembly 3 is rotatably installed on the valve body 1. The limit assembly 3 includes a limit arm 4 (specifically made of plastic material) and an elastic member 5 (specifically a pressure spring). The limit arm 4 is rotatably arranged on the outer wall of the valve body 1, and the elastic member 5 is installed between the limit arm 4 and the valve body 1. One end of the elastic member 5 is installed on the valve body 1, and the other end extends and presses against the limit arm 4, so that one end of the limit arm 4 is inclined toward the side of the handle 2. The state is set, and the inclined end of the limit arm 4 is limited and clamped on the handle 2. When the handle 2 is in the tightened and closed state, the limit arm 4 can be clamped on the handle 2 through the ejection force of the elastic member 5, thereby realizing axial locking of the handle 2. When the handle 2 needs to be opened for sampling, one end of the limit arm 4 located on the elastic member 5 is pressed to realize the separation of the limit arm 4 from the handle 2, or the limit handle 2 is pulled up and rotated toward the side of the elastic member 5, which can also release the axial locking of the handle 2, thereby solving the problem of the handle 2 being opened due to looseness or accidental touch.

[0027] As attached Figure 2As shown, the valve body 1 is provided with a mounting groove 8, and a hinge seat 9 (an integrated structure) is provided in the mounting groove 8. A rotating rod 10 is penetrated by the hinge seat 9, and a hinge hole 11 adapted to the rotating rod 10 is provided on the limiting arm 4. The limiting arm 4 realizes the rotation operation, and the positioning rotation of the limiting arm 4 is realized by the contraction operation of the elastic member 5.

[0028] As attached Figure 2 As shown, a positioning groove 12 is provided on the mounting groove 8 on one side of the hinge seat 9. One end of the elastic member 5 is installed in the positioning groove 12, and the other end is pressed against the limiting arm 4, thereby realizing the positioning installation of the elastic member 5 and preventing the elastic member 5 from falling off during use, and having a good positioning effect.

[0029] As attached Figure 2 As shown, the limiting arm 4 is provided with a positioning boss 13 (an integrated structure) on the side facing the elastic member 5. The positioning boss 13 extends toward the side of the elastic member 5. One end of the elastic member 5 is sleeved on the positioning boss 13. The limiting arm 4 can stably transmit the force released by the elastic member 5 through the positioning boss 13, and at the same time realize the double-end positioning of the elastic member 5 with the positioning groove 12.

[0030] As attached Figure 2 As shown, the limiting arm 4 is provided with a clamping portion 14 (an integrated structure), and the clamping portion 14 is connected to the limiting arm 4 in an L-shaped configuration, and the valve body 1 is provided with limiting through holes 15 for clamping the clamping portion 14 (specifically, two to four are provided, and are in a connected state to prevent the clamping portion 14 from breaking and being unable to be removed from the limiting through hole 15). The L-shaped configuration can achieve axial locking of the handle 2, and the clamping portion 14 and the limiting through hole 15 are used to achieve limiting clamping to prevent the handle 2 from loosening.

[0031] As attached Figure 2 As shown, two clamping legs 16 (an integrated structure) are symmetrically provided on the clamping portion 14, and a positioning flange 17 (an integrated structure) is provided on the side of the clamping leg 16 facing the limiting through hole 15. A fixing groove 18 adapted to the positioning flange 17 is provided on the limiting through hole 15. The clamping legs 16 provide a more stable support and limiting effect, effectively preventing the limiting arm 4 from loosening during use.

[0032] As attached Figure 2 As shown, the opening width of the limiting through hole 15 is smaller than the plug-in width of the clamping portion 14 , and the two clamping legs 16 are contracted toward each other during plugging, and the contraction pressure is released after passing through the opening and clamped on the fixing groove 18 .

[0033] As attached Figure 2As shown, a gap is provided between the two clamping legs 16 . The purpose of providing the gap is to allow the two clamping legs 16 to retract inward during installation and pass through the opening of the limiting through hole 15 .

[0034] As attached Figure 2 As shown, a yielding arc surface 19 is provided at the connection between the limiting arm 4 and the clamping portion 14, which can effectively avoid structural interference with the valve body 1 and has a good yielding effect.

[0035] In the present invention, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present invention, and do not specifically refer to any part or element in the present invention, and cannot be understood as a limitation on the present invention.

Claims

1. A sampling valve, comprising a valve body (1), wherein a handle (2) for opening and closing is mounted on the valve body (1), and characterized in that: A limiting assembly (3) is rotatably mounted on the valve body (1), and the limiting assembly (3) comprises a limiting arm (4) and an elastic member (5). The limiting arm (4) is rotatably mounted on the outer wall of the valve body (1), and the elastic member (5) is mounted between the limiting arm (4) and the valve body (1). One end of the elastic member (5) is mounted on the valve body (1), and the other end extends and presses against the limiting arm (4), so that one end of the limiting arm (4) is arranged in an inclined state toward the side of the handle (2), and the inclined end of the limiting arm (4) is clamped on the handle (2).

2. A sampling valve according to claim 1, characterized in that: The valve body (1) is provided with a mounting groove (8), a hinge seat (9) is provided in the mounting groove (8), a rotating rod (10) is provided through the hinge seat (9), and a hinge hole (11) adapted to the rotating rod (10) is provided on the limiting arm (4).

3. A sampling valve according to claim 2, characterized in that: A positioning groove (12) is provided on one side of the hinge seat (9) on the installation groove (8); one end of the elastic member (5) is installed in the positioning groove (12) and the other end is pressed against the limiting arm (4).

4. A sampling valve according to claim 3, characterized in that: The limiting arm (4) is provided with a positioning boss (13) on one side facing the elastic member (5). The positioning boss (13) extends toward one side of the elastic member (5). One end of the elastic member (5) is sleeved on the positioning boss (13).

5. A sampling valve according to claim 4, characterized in that: The limiting arm (4) is provided with a clamping portion (14), the clamping portion (14) is connected to the limiting arm (4) and is arranged in an L-shaped shape, and the valve body (1) is provided with a limiting through hole (15) for clamping the clamping portion (14).

6. A sampling valve according to claim 5, characterized in that: Two clamping legs (16) are symmetrically arranged on the clamping portion (14), a positioning flange (17) is arranged on the side of the clamping leg (16) facing the limiting through hole (15), and a fixing groove (18) adapted to the positioning flange (17) is opened on the limiting through hole (15).

7. A sampling valve according to claim 6, characterized in that: The opening width of the limiting through hole (15) is smaller than the insertion width of the clamping portion (14).

8. A sampling valve according to claim 7, characterized in that: A gap is provided between the two clamping legs (16).

9. The sampling valve according to claim 6, characterized in that: A cambered surface (19) is provided at the connection between the limiting arm (4) and the clamping portion (14).

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